CN106982111A

CN106982111A - Ascending control information UCI report method and device

Info

Publication number: CN106982111A
Application number: CN201610032828.4A
Authority: CN
Inventors: 李新彩; 苟伟; 赵亚军; 毕峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-01-18
Filing date: 2016-01-18
Publication date: 2017-07-25
Anticipated expiration: 2036-01-18
Also published as: WO2017124863A1; CN106982111B

Abstract

The invention provides a kind of ascending control information UCI report method and device, wherein, this method includes：It is determined that reporting the corresponding more than two candidate UCI of UCI unauthorized carrier wave to report carrier wave for terminal；Carrier wave is reported to carry out reporting for UCI using candidate the UCI more than above-mentioned two of determination.Pass through the present invention, solve present in correlation technique when terminal performed on unauthorized carrier wave CCA it is unsuccessful when caused can not feed back UCI, and base station can not know the information of down channel, the problem of reducing downlink data transmission success rate, and then reached terminal performed on unauthorized carrier wave CCA it is unsuccessful when can also feed back UCI, ensure that the information of down channel is known in base station in time, improve the effect of downlink data transmission success rate.

Description

Method and device for reporting uplink control information UCI

Technical Field

The invention relates to the field of communication, in particular to a method and a device for reporting uplink control information UCI.

Background

The Long-Term Evolution (Long-Term Evolution, LTE for short) system uses an unlicensed carrier to work, which is an important content in the LTE Evolution process. The technology enables the LTE system to use the existing unlicensed carrier, greatly improves the potential spectrum resources of the LTE system, and enables the LTE system to obtain lower spectrum cost.

There are two main modes of LTE using unlicensed communication, one is Carrier Aggregation (CA), one is unlicensed as a secondary component Carrier access, and the other is an access mode using Dual Connectivity (DC).

According to the existing protocol, Uplink Control Information (UCI) of a terminal at a certain time is transmitted only on one Uplink carrier, and for Channel State Information (CSI) Information reported periodically, one component carrier can only feed back CSI of the carrier. For the aperiodic reported CSI, the base station triggers only one carrier to perform multi-carrier CSI feedback. In both CA and DC scenarios, there are cases where uplink control information is transmitted on an unlicensed carrier. According to the requirement of regional regulation, the terminal needs to make Listen Before Talk (Listen Before Talk, abbreviated as LBT) (also referred to as clear channel Assessment, abbreviated as CCA) Before performing uplink data transmission on the unlicensed carrier. However, if the periodic or specified aperiodic feedback carrier terminal fails to perform LBT (or referred to as CCA), uplink control information of some or all cell scell carrier sets fed back on the carrier may not be fed back, which affects the base station to acquire information of the downlink channel, and thus the efficiency of successful transmission of downlink data may be reduced.

Aiming at the problems that UCI can not be fed back and a base station can not acquire information of a downlink channel and the success rate of downlink data transmission is reduced, which are caused when a terminal fails to execute CCA on an unauthorized carrier wave in the related technology, an effective solution is not provided at present.

Disclosure of Invention

The invention provides a method and a device for reporting Uplink Control Information (UCI), which are used for at least solving the problems that the UCI cannot be fed back when a terminal fails to execute CCA on an unauthorized carrier wave, a base station cannot acquire the information of a downlink channel and the success rate of downlink data transmission is reduced in the related technology.

According to an aspect of the present invention, a method for reporting uplink control information UCI is provided, including: determining more than two candidate UCI reporting carriers corresponding to the unauthorized carriers used for reporting the UCI by the terminal; and reporting the UCI by using the determined more than two candidate UCI reporting carriers.

Optionally, determining the two or more candidate UCI reporting carriers corresponding to the unlicensed carrier for the terminal to report the UCI includes: and determining the more than two candidate UCI reporting carriers configured by the base station for the unauthorized carrier used for the terminal to report the UCI.

Optionally, determining that the base station is configured to report the two or more candidate UCI reporting carriers of the unlicensed carrier for the terminal to report the UCI includes at least one of the following manners: determining the more than two candidate UCI reporting carriers through a received Radio Resource Control (RRC) message from the base station; determining an activated carrier in carriers configured by the base station as the more than two candidate UCI reporting carriers; determining the more than two candidate UCI reporting carriers through a display signaling received from the base station, wherein the display signaling is carried in one of the following manners: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

Optionally, the reporting of the UCI by using the determined two or more candidate UCI reporting carriers includes: when the base station carries out the scheduled time after the downlink transmission burst on the carrier wave successfully competed in advance in the more than two candidate UCI reporting carrier waves, the base station reports the UCI on the carrier wave successfully competed by the base station; or, executing a Clear Channel Assessment (CCA) on the determined more than two candidate UCI reporting carriers, and reporting the UCI on one of the more than two candidate UCI reporting carriers according to an execution result of executing the CCA.

Optionally, the manner of performing the CCA on the determined two or more candidate UCI reporting carriers includes one of: performing a fixed CCA for a CCA detection duration; performing a CCA with a backoff value of N ═ 1 or N ═ 2 for more than two CCA detection periods; the CCA is performed one or more times within a predefined UCI transmission time window or a UCI transmission time window configured by the base station.

Optionally, the time domain position for performing the CCA is a last symbol of a previous subframe of the UCI transmission subframe, or a first symbol of the UCI transmission subframe.

Optionally, the predefined UCI transmission time window includes at least one of: the method comprises the steps of a periodic or aperiodic UCI sending timing subframe, a q-th subframe in front of the periodic or aperiodic UCI sending timing subframe, and a q-th subframe behind the periodic or aperiodic UCI sending timing subframe, wherein q is 1 or 2.

Optionally, reporting the UCI on one of the two or more candidate UCI reporting carriers according to the execution result of executing the CCA includes at least one of: when the CCA is successfully executed on more than two candidate UCI reporting unauthorized carriers, selecting the carrier with the minimum carrier index, the highest carrier priority, the best channel condition or service data scheduling for reporting the UCI; reporting the UCI on a first carrier which successfully executes the CCA, wherein when no uplink service data is sent on the rest other carriers, the CCA is stopped being executed on the other carriers; and when the CCA is not successfully executed on multiple unauthorized carriers in the more than two candidate UCI reporting carriers which are predefined or indicated by the base station through signaling at the timing moment of non-periodic or periodic UCI reporting, reporting the UCI on authorized carriers in the more than two candidate UCI reporting carriers.

Optionally, the method comprises at least one of: when no scheduling service data is sent on the selected carrier wave for reporting the UCI, the UCI is reported independently with the maximum sending power through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH); when scheduling service data are sent on the selected carrier wave for reporting the UCI, reporting the UCI through a PUCCH; and for other unselected carriers which do not report the UCI and execute the CCA successfully, if scheduled service data are transmitted, transmitting the scheduled service data.

Optionally, the reporting of the UCI by using the determined two or more candidate UCI reporting carriers includes: after determining that at least one of the following trigger conditions for reporting the UCI is reached, reporting the UCI by using the determined more than two candidate UCI reporting carriers: and determining to send acknowledgement character ACK and/or non-acknowledgement character NACK according to the timing relation, periodic channel state information CSI report and non-periodic CSI report triggered by the base station.

Optionally, the request information corresponding to the aperiodic CSI report triggered by the base station is carried by downlink control information DCI and is sent on a CSI request carrier or one or more configured candidate UCI feedback carriers.

Optionally, the method comprises at least one of: the reporting mode of the channel state information CSI in the UCI is configured semi-statically through high-level signaling; the reporting of the channel quality indicator CQI in the UCI is predefined as broadband CQI reporting; the channel quality indicator CQI in the UCI is the latest channel measurement value; the UCI comprises UCI corresponding to a carrier used for reporting the UCI and/or UCI of all feedback carriers configured in the carrier used for reporting the UCI in a predefined UCI sending time window.

Optionally, when reporting the UCI, the method further includes at least one of: reporting the UCI in a Physical Uplink Control Channel (PUCCH) and/or a Physical Uplink Shared Channel (PUSCH) on an unlicensed carrier; the periodic UCI and the aperiodic UCI are reported in a Physical Uplink Shared Channel (PUSCH) on an unauthorized carrier, wherein when the periodic UCI is reported, the base station distributes reported resources and Modulation Coding Strategies (MCS) to the unauthorized carrier through a semi-persistent scheduling (SPS); when reporting the aperiodic UCI, the base station dynamically allocates reported resources and modulation coding strategy MCS to the PUSCH on the unauthorized carrier wave through downlink control information DCI; reporting the UCI in a Physical Uplink Shared Channel (PUSCH) on an unlicensed carrier, wherein the unlicensed carrier only supports the reporting of aperiodic UCI; reporting the UCI from the first symbol or the second symbol or the 8 th symbol of a subframe in which a carrier used for reporting the UCI is positioned.

Optionally, when the UCI is carried on the PUCCH on the unlicensed carrier and is not transmitted simultaneously with the PUSCH, the resource mapping method of the PUCCH includes at least one of: modifying the mapping interval of subcarriers to M subcarriers, and mapping the UCI to p equally-spaced Physical Resource Blocks (PRBs), wherein M is a positive integer, and p is a positive integer; the requirement that 80% bandwidth resources are occupied when the PUCCH is transmitted is achieved through filling a preamble, or demodulating a reference signal (DMRS), or sounding a reference signal (SRS), or through a UCI frequency domain repetition mode.

According to another aspect of the present invention, there is also provided a method for reporting uplink control information UCI, including: determining more than two candidate UCI reporting carriers for an unauthorized carrier used for reporting UCI by a terminal, wherein the more than two candidate UCI reporting carriers are used for reporting the UCI by the terminal; and configuring the determined more than two candidate UCI reporting carriers to the terminal.

Optionally, configuring the determined more than two candidate UCI reporting carriers to the terminal includes at least one of the following manners: configuring the more than two candidate UCI reporting carriers to the terminal through a Radio Resource Control (RRC) message; configuring the more than two candidate UCI reporting carriers to the terminal in a mode of configuring activated carriers in the carriers; configuring the more than two candidate UCI reporting carriers to the terminal through a display signaling, wherein the display signaling is carried in one of the following modes: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

Optionally, after configuring the determined more than two candidate UCI reporting carriers to the terminal, the method further includes: and performing downlink transmission burst on an unauthorized carrier which is successfully contended in advance in the more than two candidate UCI reporting carriers, wherein the downlink transmission burst is used for reporting the UCI on the unauthorized carrier which is successfully contended after a preset time after indicating the downlink transmission burst in the terminal.

According to another aspect of the present invention, an apparatus for reporting uplink control information UCI is provided, including: the terminal comprises a first determining module, a second determining module and a third determining module, wherein the first determining module is used for determining more than two candidate UCI reporting carriers corresponding to unauthorized carriers used for reporting UCI by the terminal; and a reporting module, configured to report the UCI by using the determined two or more candidate UCI reporting carriers.

According to another aspect of the present invention, there is also provided a device for reporting uplink control information UCI, including: a second determining module, configured to determine, for an unlicensed carrier used for a terminal to report UCI, more than two candidate UCI reporting carriers, where the more than two candidate UCI reporting carriers are used for the terminal to report the UCI; and a configuration module, configured to configure the determined more than two candidate UCI reporting carriers to the terminal.

By the invention, more than two candidate UCI reporting carriers corresponding to the unauthorized carrier determined to be used for the terminal to report the UCI are adopted; and reporting the UCI by using the determined more than two candidate UCI reporting carriers. The problems that UCI cannot be fed back and a base station cannot acquire information of a downlink channel and the success rate of downlink data transmission is reduced caused by the fact that a terminal fails to execute CCA on an unauthorized carrier in the related technology are solved, and the effects that the UCI can be fed back when the terminal fails to execute CCA on the unauthorized carrier are achieved, the base station can acquire the information of the downlink channel in time, and the success rate of downlink data transmission is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a first reporting method of UCI according to an embodiment of the present invention;

fig. 2 is a flowchart of a second reporting method of UCI according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an uplink control information feedback carrier configuration according to an embodiment of the present invention;

fig. 4 is a schematic diagram of uplink control information feedback according to an embodiment of the present invention;

fig. 5 is a schematic diagram of uplink control information resource mapping according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an uplink control information transmission structure according to an embodiment of the present invention;

fig. 7 is a block diagram of a first apparatus for reporting uplink control information UCI according to an embodiment of the present invention;

fig. 8 is a block diagram of a reporting apparatus for second uplink control information UCI according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this embodiment, a method for reporting uplink control information UCI is provided, and fig. 1 is a flowchart of a first method for reporting UCI according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, determining more than two candidate UCI reporting carriers corresponding to the unauthorized carrier used for reporting UCI by the terminal;

and step S104, reporting the UCI by using the determined more than two candidate UCI reporting carriers.

Wherein, it may be the terminal that performs the above-mentioned operations. As can be seen from the foregoing embodiments, the unlicensed carrier for reporting the UCI may correspond to more than two candidate UCI reporting carriers, where the more than two candidate UCI reporting carriers may include the unlicensed carrier itself, and the more than two candidate UCI reporting carriers may include other licensed carriers or other unlicensed carriers besides the unlicensed carrier. Even if CAA is not successfully executed on the unauthorized carrier, other candidate UCI reporting carriers can be used for reporting UCI, and the probability of sending uplink control information on the unauthorized carrier is improved. The problems that UCI cannot be fed back and a base station cannot acquire information of a downlink channel and the success rate of downlink data transmission is reduced caused by the fact that a terminal fails to execute CCA on an unauthorized carrier in the related technology are solved, and the effects that the UCI can be fed back when the terminal fails to execute CCA on the unauthorized carrier are achieved, the base station can acquire the information of the downlink channel in time, and the success rate of downlink data transmission is improved.

In an optional embodiment, the two or more candidate UCI reporting carriers corresponding to the unlicensed carrier may be configured by the base station, and in this embodiment, determining the two or more candidate UCI reporting carriers corresponding to the unlicensed carrier used for the terminal to report the UCI includes: and determining more than two candidate UCI reporting carriers configured by the base station for the unauthorized carrier used for reporting the UCI by the terminal. The two or more candidate UCI reporting carriers may be two or more candidate UCI reporting carrier sets, and different carrier sets may be configured with different reporting sets.

The base station may be configured in multiple ways when configuring the candidate carriers, and optionally, determining that the base station configures more than two candidate UCI reporting carriers for an unlicensed carrier used for the terminal to report UCI includes at least one of the following ways: determining the more than two candidate UCI reporting carriers through a received Radio Resource Control (RRC) message from a base station; determining an activated carrier in carriers configured by a base station as the more than two candidate UCI reporting carriers; determining the two or more candidate UCI reporting carriers through a display signaling received from the base station, wherein the display signaling may be carried in one of the following manners: downlink Control Information (DCI) signaling, Physical Hybrid Indicator Channel (PHICH) Channel resources, and Physical Control Format Indicator Channel (PCFICH) Channel resources. When the base station dynamically indicates the candidate carrier reported by the UCI through the real signaling, the base station may also send a DCI signaling to the candidate carrier to trigger the candidate carrier to serve as the candidate carrier reported by the UCI finally.

In an optional embodiment, the reporting of the UCI by using the determined two or more candidate UCI reporting carriers includes: when a base station reports a predetermined time (for example, 16 microseconds) after a downlink transmission burst is performed on a carrier successfully contended in advance in more than two candidate UCI reporting carriers, reporting the UCI on the carrier successfully contended by the base station; or, executing a Clear Channel Assessment (CCA) on the determined more than two candidate UCI reporting carriers, and reporting the UCI on one of the more than two candidate UCI reporting carriers according to the execution result of executing the CCA. Wherein, CCA may not be performed in the first UCI reporting method; in the second UCI reporting method, CCA needs to be performed, and when the terminal performs CCA on the configured carrier, CCA may be performed on the configured carrier at a corresponding timing time according to a predefined UCI transmission period or after receiving an aperiodic trigger feedback indication signaling sent by the base station. Optionally, the condition that the base station sends the aperiodic trigger feedback indication signaling may include: when the base station sends a Channel State Information-reference signal (CSI-RS) to an unlicensed carrier, and the base station is about to compete for the carrier resource and send a PDSCH, the base station triggers the UE to perform aperiodic feedback.

When performing CCA, there may be multiple manners of performing CCA, and in an optional embodiment, the manner of performing CCA on the determined two or more candidate UCI reporting carriers includes one of: performing a fixed CCA for a CCA detection duration; performing a CCA with a backoff value of N ═ 1 or N ═ 2 for more than two CCA detection periods; the CCA is performed one or more times within a predefined UCI transmission time window or a UCI transmission time window configured by the base station. The window size of the UCI transmission time window is 2ms, 3ms, or 4ms, the terminal may perform CCA for multiple times within the UCI transmission time window, and may transmit UCI in the current subframe or the next subframe after one successful transmission. When the UCI is an Acknowledge/Non-Acknowledge character, the CCA may be performed only once for a fixed clear channel assessment CCA detection duration. Optionally, when the terminal fails to perform CCA in a subframe sent at a timing or a period according to the timing relationship, but performs CCA successfully in a next scheduling subframe, the UE sends the CI information together with the data of the current scheduling.

In an optional embodiment, the time domain position for performing the CCA is a last symbol of a previous subframe of the UCI transmission subframe, or a first symbol of the UCI transmission subframe.

In an optional embodiment, the predefined UCI transmission time window includes at least one of: the subframe comprises a periodic or aperiodic UCI transmission timing subframe, a qth subframe before the periodic or aperiodic UCI transmission timing subframe, and a qth subframe after the periodic or aperiodic UCI transmission timing subframe, wherein q is 1 or 2.

In an alternative embodiment, the terminal may determine the carrier and bearer channel for transmitting UCI according to a predefined rule. For example, in reporting UCI on one of more than two candidate UCI reporting carriers according to an execution result of performing CCA, reporting UCI according to at least one of the following predefined rules may be performed: when CCA is successfully executed on more than two candidate UCI reporting unauthorized carriers, selecting the carrier with the minimum carrier index, the highest carrier priority, the best channel condition or service data scheduling for reporting the UCI; reporting UCI on the first carrier which successfully executes CCA, wherein when no uplink service data is transmitted on the rest other carriers, CCA is stopped being executed on the other carriers (of course, if the other carriers have scheduled uplink services to be transmitted, CCA is continuously executed on the other carriers); when the timing moment of non-periodic or periodic UCI reporting is reached, CCA is not successfully executed on a plurality of non-authorized carriers in more than two candidate UCI reporting carriers which are predefined or indicated by a base station through signaling, and UCI is reported on authorized carriers in the more than two candidate UCI reporting carriers.

In an alternative embodiment, the method may include at least one of: when no scheduling service data is sent on the selected carrier wave for reporting the UCI, the UCI is reported independently at the maximum sending power through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH); when scheduling service data are sent on the selected carrier for reporting the UCI, reporting the UCI through a PUCCH; and for other unselected carriers which do not report UCI and execute CCA successfully, if scheduled service data are transmitted, transmitting the scheduled service data.

In an optional embodiment, the reporting of the UCI by using the determined two or more candidate UCI reporting carriers includes: after determining that at least one of the following trigger conditions for reporting the UCI is reached, reporting the UCI by using the determined more than two candidate UCI reporting carriers: and determining to send acknowledgement character ACK and/or non-acknowledgement character NACK according to the timing relation, periodic channel state information CSI report and non-periodic CSI report triggered by the base station.

In an optional embodiment, the request information corresponding to the aperiodic CSI report triggered by the base station is carried by DCI, and is sent on a CSI request carrier or one or more configured candidate UCI feedback carriers.

In an alternative embodiment, the method comprises at least one of: the reporting mode of the channel state information CSI in the UCI is configured in a semi-static way through high-level signaling; the reporting of the channel quality indicator CQI in the UCI is predefined as the reporting of the broadband CQI; the channel quality indicator CQI in the UCI is the latest channel measurement value; the UCI comprises UCI corresponding to a carrier used for reporting the UCI and/or UCI of all feedback carriers configured in the carrier used for reporting the UCI in a predefined UCI sending time window. Optionally, the reported UCI includes periodic CSI in a UCI feedback window and all CSI reported by the carrier triggered by the DCI signaling.

In an optional embodiment, when reporting the UCI, the method further includes at least one of: reporting UCI in a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH on an unlicensed carrier; the periodic UCI and the aperiodic UCI are reported in a Physical Uplink Shared Channel (PUSCH) on an unauthorized carrier, wherein when the periodic UCI is reported, a base station distributes reported resources and Modulation Coding Strategies (MCS) to the unauthorized carrier through a semi-persistent scheduling (SPS); when reporting the aperiodic UCI, the base station dynamically allocates reported resources and modulation coding strategy MCS to the PUSCH on the non-authorized carrier wave through downlink control information DCI; reporting UCI in a Physical Uplink Shared Channel (PUSCH) on an unauthorized carrier, wherein the unauthorized carrier only supports the reporting of aperiodic UCI; reporting UCI from the first symbol or the second symbol or the 8 th symbol of a subframe where a carrier used for reporting UCI is located. Optionally, when reporting UCI in a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH on an unlicensed carrier, periodic UCI may be transmitted on the PUCCH, and when the PUCCH is sent, the base station needs to simultaneously schedule service data for transmission on the carrier, that is, when the PUCCH is transmitted, the PUSCH must be transmitted together. Optionally, the unlicensed carrier supports periodic UCI reporting, and there is no scheduled service data when the periodic UCI is reported, that is, the UCI is separately transmitted on the unlicensed carrier through the PUCCH.

In an optional embodiment, when the UCI is carried on a PUCCH on an unlicensed carrier and is not transmitted simultaneously with the PUSCH, the resource mapping method of the PUCCH includes at least one of: modifying the mapping interval of subcarriers to M subcarriers, and mapping the UCI to p equally-spaced Physical Resource Blocks (PRBs), wherein M is a positive integer, and p is a positive integer; the requirement that 80% of bandwidth resources are occupied when the PUCCH is transmitted is achieved by filling a preamble, or a demodulation Reference Signal (DMRS), or a Sounding Reference Signal (SRS), or by a UCI frequency domain repetition mode. Optionally, the UCI includes ACK/NACK information, channel quality status CSI feedback information channel quality Indication (CQI for short)/Precoding Matrix Indication (PMI for short)/Rank Indication (RI for short), where the ACK/NACK information is preferentially transmitted on the above-mentioned unlicensed carrier and/or preferentially transmitted on a Primary Cell (PCell for short) or a secondary Cell (SCell for short).

Fig. 2 is a flowchart of a second method for reporting UCI according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:

step S202, more than two candidate UCI reporting carriers are determined for the unauthorized carrier used for reporting UCI by the terminal, wherein the more than two candidate UCI reporting carriers are used for reporting UCI by the terminal;

and step S204, configuring the determined more than two candidate UCI reporting carriers to the terminal.

Wherein, it may be the base station to perform the above steps. In the above embodiment, the base station configures more than two candidate UCI reporting carriers for the unlicensed carrier for the terminal to report the UCI, where the more than two candidate UCI reporting carriers may include the unlicensed carrier itself, and the more than two candidate UCI reporting carriers may include other licensed carriers or other unlicensed carriers besides the unlicensed carrier. Even if the terminal does not successfully execute CAA on the unauthorized carrier, other candidate UCI can be used for reporting the UCI by the carrier, so that the probability of sending the uplink control information on the unauthorized carrier is improved. The problems that UCI cannot be fed back and a base station cannot acquire information of a downlink channel and the success rate of downlink data transmission is reduced caused by the fact that a terminal fails to execute CCA on an unauthorized carrier in the related technology are solved, and the effects that the UCI can be fed back when the terminal fails to execute CCA on the unauthorized carrier are achieved, the base station can acquire the information of the downlink channel in time, and the success rate of downlink data transmission is improved.

In an optional embodiment, configuring the determined two or more candidate UCI reporting carriers to the terminal includes at least one of the following manners: configuring the more than two candidate UCI reporting carriers to a terminal through a Radio Resource Control (RRC) message; configuring the more than two candidate UCI reporting carriers to a terminal in a mode of configuring activated carriers in the carriers; and configuring the more than two candidate UCI reporting carriers to the terminal through a display signaling, wherein the display signaling comprises the following bearing modes: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

In an optional embodiment, after configuring the determined two or more candidate UCI reporting carriers to the terminal, the method further includes: and performing downlink transmission burst on the unauthorized carrier which is successfully contended in advance in the more than two candidate UCI reporting carriers, wherein the downlink transmission burst is used for indicating the terminal to report the UCI on the unauthorized carrier which is successfully contended after a preset time after the downlink transmission burst.

The invention is illustrated below with reference to specific examples:

the first embodiment is as follows:

this embodiment explains the carrier configuration reported by UCI.

The base station allocates at least two reporting carriers to each unauthorized carrier of the terminal, and the base station also comprises at least one carrier and/or one authorized carrier of other allocated carriers besides the carrier. Fig. 3 shows a configuration of reporting carriers of uplink control information corresponding to each carrier, where fig. 3 is a schematic diagram of configuration of uplink control information feedback carriers according to an embodiment of the present invention, where: the number of the carriers reported by the UCI corresponding to each unlicensed carrier may be multiple. For example, the carrier reported by the uplink control information of the unlicensed carrier cell4 may be an licensed carrier and an unlicensed carrier cell3, in addition to the local carrier. Although a plurality of feedback carriers (i.e., candidate carriers) are configured, the terminal finally performs feedback of the uplink control information on only one of the carriers (i.e., performs reporting of UCI).

The specific configuration implementation method comprises at least one of the following steps:

the first method is as follows: and the base station configures a feedback carrier set of each cell through RRC message. The cell set configured by the UE is not changed, and different reporting sets are configured for different carrier sets. And reasonable matching between authorization and non-authorization.

The second method comprises the following steps: and determining the cell carrier set fed back by the cell in an implicit mode. For example, all activated carriers in the carrier set configured for the terminal are used as candidate carriers for feeding back the UCI.

The third method comprises the following steps: and dynamically indicating the fed back carrier wave through display signaling. And the base station indicates a plurality of unlicensed carriers to feed back CSI through DCI signaling or PHICH resources or PCFICH. Wherein, the unlicensed carrier is a carrier that the base station has competed successfully. That is, the base station sends DCI signaling to two or more carriers simultaneously to trigger the carriers to serve as candidate carriers for final UCI reporting, and each carrier gives feedback configuration information such as MCS, RB and the like corresponding to reporting.

The method for configuring a plurality of reported CSI carriers for each carrier can improve the transmission opportunity of uplink control information in the unauthorized carrier, thereby allocating proper resources and MCS to the downlink scheduling of the carrier and improving the probability of successful transmission of downlink data of the carrier.

Example two

This embodiment explains a trigger condition for transmission of uplink control information in an unlicensed carrier.

When a downlink service in a carrier configured by a terminal needs to feed back ACK/NACK, or a periodic CSI or an aperiodic CSI needs to be reported, UCI needs to be transmitted in a configured candidate carrier.

The conditions for the base station to trigger CSI reporting in an aperiodic manner include:

when the carrier has CSI-RS transmission, and the base station is about to compete for the unlicensed carrier resources and about to transmit PDSCH, the base station triggers the UE to feedback CSI including CQI/PMI/RI in an aperiodic way. Or when there is a carrier triggering scheduling in the carriers configured by the UE, for example, there is uplink service that needs to be scheduled in the carrier, triggering aperiodic CSI to be sent together with service data.

And the ACK/NACK feedback moment is n + k subframes after the transmission subframe of the carrier PDSCH, wherein n is the transmission subframe of the PDSCH, and k is a value related to a frame structure.

The reporting period of the CSI is 2ms, 5ms or 10 ms.

And when the condition is met, the UE executes CCA on the feedback carrier configured by the carrier, and after the CCA is successful, the UE transmits the uplink control information on one candidate reporting carrier according to a preset rule.

EXAMPLE III

The present embodiment describes a transmission method of uplink control information.

The system predefines or the base station configures a UCI transmission time window, and the window size may be 2ms, or 3ms or 4 ms. The UE has multiple opportunities to perform CCA in the transmission window, or the UE performs CCA from the starting point of the window, and after one success, may transmit UCI in the current subframe or the next subframe, and if unsuccessful, continue to perform CCA at the position of the next CCA.

That is, the UCI may be transmitted in one or two subframes before the predetermined subframe, or may be transmitted one or two subframes after the predetermined subframe.

Fig. 4 is a schematic diagram of uplink control information feedback according to an embodiment of the present invention, as shown in fig. 4: assuming that the window of UCI transmission defined by the system is 2ms, the terminal may start CCA from a subframe before a subframe where UCI is transmitted periodically or aperiodically. If the CCA is successfully performed in the first two symbols of the previous subframe, the terminal may transmit UCI in the first 1ms of the 2ms transmission window, and if the subframe has scheduled traffic data, UCI information is carried on the PUSCH in a multiplexing manner with the traffic data. If CCA is not successful yet in the first two symbols, the terminal continues CCA, and if CCA is successful before the next 1ms, UCI may be transmitted in a corresponding subframe according to a timing relationship.

The above-mentioned manner of performing CCA may include: the CCA is not executed, the CCA detected for a preset time is executed only once, and the CCA detected for a plurality of times with backoff and backoff value less than a predefined threshold is executed. The backoff value is preferably 1, but may be 2. Not performing CCA means that the base station firstly successfully contends for a certain carrier and directly transmits uplink control information on the carrier by a terminal at most 16 microseconds after performing downlink transmission burst on the carrier.

The uplink control information is only UCI information of the local carrier, such as ACK/NACK information and/or CSI report information. Or the reported UCI information includes all uplink control information transmitted in the time window and configured to be transmitted in the carrier. For example, after the CC1 carrier LBT succeeds first, the terminal configures ACK/NACK information to be reported in the time window of the carrier CC2 and the carrier CC4 fed back by the carrier, or periodic CSI reporting information, or triggered aperiodic CSI reporting information may be transmitted through the CC1 carrier.

Example four

This embodiment explains the determination of the carrier on which the uplink control information is transmitted.

And the terminal determines the carrier and the bearer channel for sending the uplink control information according to a predefined rule. The predefined rules include:

and if the CCAs of a plurality of unauthorized carriers are synchronous and the UE successfully preempts more than one unauthorized carrier at the same time, the terminal feeds back the carrier with the minimum carrier index or the highest carrier priority.

For example, if the UE succeeds in LBT of the carriers with unlicensed carrier indexes CC1, CC4, and CC8 at the same time, the UE selects to transmit uplink control information on the carrier index CC 1.

Alternatively, the carrier CC4 with the best uplink channel quality is selected for uplink control information transmission.

Or selecting the carrier with the scheduling service to transmit the uplink control information through the PUCCH. For example, CC1, CC4 and CC8LBT are successful at the same time, but the subframe has data scheduling only on CC8, the terminal can carry UCI on PUCCH and transmit scheduled traffic data PUSCH together. If the sub-frame CC1 also has scheduled data, UCI information will be transmitted together with PUSCH through PUCCH on CC 1.

And simultaneously, the fed-back carrier wave reports all CSI information which is configured on the carrier wave and fed back by the carrier wave and meets the triggering condition.

Alternatively, when the PUCCH carries UCI of more than one carrier, the UCI may be carried through format 3 or format4 or format 5. When the PUCCH capacity is limited, part of UCI information may also be carried through PUSCH.

Meanwhile, for other contended unlicensed carriers, if no uplink service is scheduled, the UE releases the carrier, that is, does not send any uplink information on the carrier.

When all carriers do not schedule uplink service, the periodically transmitted CSI information may be separately carried through the PUSCH. And the base station allocates the CSI transmission resources and MCS to the terminal in an SPS scheduling mode.

Or the transmission of periodic feedback on the PUSCH is realized by dynamically scheduling the PUSCH.

Or the periodic CSI report is still carried by a PUCCH channel, and PUSCH service data is transmitted at the middle position of the system bandwidth during transmission.

The CSI reporting mode is configured semi-statically through higher layer information, or predefined, such as wideband CQI feedback.

Optionally, for the DC scenario, the UE performs resource contention on the Pscell first, and sends the uplink control information on the carrier through the PUCCH after success. If contention on the Pscell fails but contention on other scheduled scells succeeds, uplink control information may also be transmitted on the scells with successful contention.

Optionally, for the CA scenario, if none of the carrier LBTs reported by the triggered unlicensed carrier is successful, the ue may switch to the predefined licensed carrier for feedback.

Or the UE performs feedback on the first carrier for which CCA is successful. And if the carrier has service data scheduling, carrying through a PUSCH.

And if the rest carriers have no uplink service data transmission, the UE stops CCA on the carrier. If the rest carriers have scheduled uplink services to be sent, the CCA is continuously carried out on the carrier.

EXAMPLE five

This embodiment explains resource mapping when uplink control information is carried through PUCCH.

When the UCI is carried through PUCCH and is transmitted together with the scheduled PUSCH, the UCI carried on the PUCCHformat 1/1a/1b/2a/2b/3 is subjected to resource mapping according to the existing mode.

When the PUCCH is transmitted on the unlicensed carrier alone, the requirement of occupying bandwidth can be satisfied by the following resource mapping manner.

The first method is as follows: a discrete Resource Element (RE) mapping manner is adopted.

The UCI content of one or a plurality of original RBs is mapped to a plurality of discontinuous subcarriers with equal intervals N by taking the subcarriers as a unit, which is equivalent to modifying the subcarrier intervals. The structure of the specific resource mapping is shown in fig. 5, and fig. 5 is a schematic diagram of the uplink control information resource mapping according to the embodiment of the present invention.

For example, the mapping interval of the PUCCH format 1/1a/1b/2a/2b/3 subcarriers is modified to 12 subcarriers, and the original 12 subcarriers of data are mapped to 24 PRBs. And still employs intra-slot frequency hopping.

When the resource mapping is finished, mapping is carried out after the RE of the first carrier is mapped, and then every 12 carriers are mapped.

The method can meet the regulation requirement that the transmission bandwidth of each UE is at least 5M.

The PUCCH is mapped in the existing manner when the unlicensed carrier does not transmit a request occupying at least 80% of the bandwidth.

The second method comprises the following steps: the frequency domain repetition mode is adopted.

Firstly, mapping the PUCCH to a sideband of a system bandwidth according to the existing PUCCH mapping mode, and then transmitting a repeated PUCCH for every N PRBs (physical resource blocks) in the middle of the residual frequency domain resources.

The value of N may be 1,2,3,4,5, 6.

The third method comprises the following steps: a preamble, or DMRS, or SRS, or PUSCH is filled in the middle of two RBs of a PUCCH, as shown in fig. 6, where fig. 6 is a schematic diagram of an uplink control information transmission structure according to an embodiment of the present invention.

Optionally, the base station is required to give the resource location of the whole bandwidth when the PUCCH frequency domain resource is configured by the high-level signaling, so as to avoid resource collision between UEs. Namely, PUCCH frequency domain repetition or data padding, needs to be considered to collide with other UE PUCCH resources.

The method can meet the requirement of non-authorized carrier occupation in the control.

By the method for sending the unlicensed spectrum uplink control information in each embodiment, the specific problem of how to transmit the uplink control information in the unlicensed carrier wave by the LTE is solved, the probability of sending the uplink control information by the terminal is improved, the base station can timely acquire the quality information of the downlink channel so as to allocate a proper MCS and a resource position to downlink scheduling, and the efficiency of downlink data transmission is improved.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a reporting apparatus of uplink control information UCI is further provided, where the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 7 is a block diagram of a first apparatus for reporting uplink control information UCI according to an embodiment of the present invention, and as shown in fig. 7, the apparatus includes a first determining module 72 and a reporting module 74, which will be described below.

A first determining module 72, configured to determine more than two candidate UCI reporting carriers corresponding to an unauthorized carrier used for a terminal to report UCI; a reporting module 74, connected to the first determining module 72, configured to report UCI by using the determined two or more candidate UCI reporting carriers.

In an optional embodiment, the first determining module 72 includes a determining unit, and the determining unit is configured to determine more than two candidate UCI reporting carriers configured by the base station for the unlicensed carrier used for the terminal to report UCI.

In an optional embodiment, the determining unit may determine, by at least one of the following manners, more than two candidate UCI reporting carriers configured by the base station for an unlicensed carrier used for reporting UCI by the terminal: determining the more than two candidate UCI reporting carriers through a received Radio Resource Control (RRC) message from a base station; determining that an activated carrier in carriers configured by the base station is more than two candidate UCI reporting carriers; determining more than two candidate UCI reporting carriers through a received display signaling from a base station, wherein the display signaling is carried in one of the following modes: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

In an optional embodiment, the reporting module 74 includes a reporting unit, configured to report, when a predetermined time elapses after a base station performs a downlink transmission burst on a carrier that is successfully contended in advance among more than two candidate UCI reporting carriers, the UCI on the carrier that is successfully contended by the base station; or, executing a clear channel assessment CCA on the determined more than two candidate UCI reporting carriers, and reporting the UCI on one of the more than two candidate UCI reporting carriers according to the execution result of executing the CCA.

In an optional embodiment, a manner of performing the CCA on the determined two or more candidate UCI reporting carriers by the reporting unit may include one of: performing a fixed CCA for a CCA detection duration; performing a CCA with a backoff value of N ═ 1 or N ═ 2 for more than two CCA detection periods; the CCA is performed one or more times within a predefined UCI transmission time window or a UCI transmission time window configured by the base station.

In an optional embodiment, the predefined UCI transmission time window includes at least one of: a periodic or aperiodic UCI transmission timing subframe, a qth subframe preceding the periodic or aperiodic UCI transmission timing subframe, and a qth subframe following the periodic or aperiodic UCI transmission timing subframe, wherein q is 1 or 2.

In an optional embodiment, the reporting unit reports the UCI on one of the two or more candidate UCI reporting carriers according to an execution result of executing the CCA, in at least one of the following manners: when CCA is successfully executed on more than two candidate UCI reporting unauthorized carriers, selecting the carrier with the minimum carrier index, the highest carrier priority, the best channel condition or service data scheduling for reporting the UCI; reporting UCI on the first carrier which successfully executes CCA, wherein when no uplink service data is sent on the rest other carriers, CCA is stopped on the other carriers; when the timing moment of non-periodic or periodic UCI reporting is reached, CCA is not successfully executed on a plurality of non-authorized carriers in more than two candidate UCI reporting carriers which are predefined or indicated by a base station through signaling, and the UCI is reported on authorized carriers in the more than two candidate UCI reporting carriers.

In an optional embodiment, the reporting unit may further perform at least one of the following operations: when no scheduling service data is sent on the selected carrier wave for reporting the UCI, the UCI is reported independently at the maximum sending power through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH); when scheduling service data are sent on the selected carrier for reporting the UCI, reporting the UCI through a PUCCH; and for other unselected carriers which do not report UCI and execute CCA successfully, if scheduled service data are transmitted, transmitting the scheduled service data.

In an optional embodiment, the reporting module 74 includes a processing module, and the processing module is configured to, after determining that at least one of the following trigger conditions for reporting UCI is reached, utilize the determined more than two candidate UCI reporting carriers to report UCI: and determining to send acknowledgement character ACK and/or non-acknowledgement character NACK according to the timing relation, periodic channel state information CSI report and non-periodic CSI report triggered by the base station.

In an optional embodiment, the reporting mode of the CSI in the UCI is configured semi-statically through a high-level signaling; in another optional embodiment, the reporting of the channel quality indicator CQI in the UCI is predefined as a wideband CQI reporting; in another optional embodiment, the channel quality indicator CQI in the UCI is a latest channel measurement value; in another optional embodiment, the UCI includes UCI corresponding to a carrier used for reporting UCI and/or UCI of all feedback carriers configured in the carrier used for reporting UCI within a predefined UCI transmission time window.

In an optional embodiment, the reporting module 74 is further configured to perform at least one of the following: reporting UCI in a physical uplink control channel PUCCH and/or a physical uplink shared channel PUSCH on an unlicensed carrier; the periodic UCI and the aperiodic UCI are reported in a Physical Uplink Shared Channel (PUSCH) on an unauthorized carrier, wherein when the periodic UCI is reported, a base station distributes reported resources and Modulation Coding Strategies (MCS) to the unauthorized carrier through a semi-persistent scheduling (SPS); when reporting the aperiodic UCI, the base station dynamically allocates reported resources and modulation coding strategy MCS to the PUSCH on the unauthorized carrier wave through downlink control information DCI; reporting UCI in a Physical Uplink Shared Channel (PUSCH) on an unauthorized carrier, wherein the unauthorized carrier only supports the reporting of aperiodic UCI; reporting the UCI from the first symbol or the second symbol or the 8 th symbol of a subframe where a carrier used for reporting the UCI is located.

In an optional embodiment, when the UCI is carried on a PUCCH on an unlicensed carrier and is not transmitted simultaneously with the PUSCH, the resource mapping method for the PUCCH includes at least one of: modifying the mapping interval of subcarriers to M subcarriers, and mapping the UCI to p equally-spaced Physical Resource Blocks (PRBs), wherein M is a positive integer, and p is a positive integer; the requirement that 80% bandwidth resources are occupied when the PUCCH is transmitted is achieved through filling of a preamble, or demodulation reference signal (DMRS), or Sounding Reference Signal (SRS), or through a UCI frequency domain repetition mode.

Fig. 8 is a block diagram of a second apparatus for reporting uplink control information UCI according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes a second determining module 82 and a configuring module 84, which will be described below.

A second determining module 82, configured to determine, for an unlicensed carrier used for a terminal to report UCI, more than two candidate UCI reporting carriers, where the more than two candidate UCI reporting carriers are used for the terminal to report the UCI; a configuring module 84, connected to the second determining module 82, configured to configure the determined two or more candidate UCI reporting carriers to the terminal.

In an alternative embodiment, the configuration module 84 includes a configuration unit configured to perform at least one of the following operations: more than two candidate UCI reporting carriers are configured to the terminal through a Radio Resource Control (RRC) message; more than two candidate UCI reporting carriers are configured to the terminal in a mode of configuring activated carriers in the carriers; more than two candidate UCI reporting carriers are configured to the terminal through a display signaling, wherein the display signaling can be carried in one of the following modes: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

In an optional embodiment, the apparatus further includes a transmission module, connected to the configuration module 84, configured to perform a downlink transmission burst on an unlicensed carrier that succeeds in contention in advance in the two or more candidate UCI reporting carriers after the determined two or more candidate UCI reporting carriers are configured to the terminal, where the downlink transmission burst is used to indicate that, after a predetermined time after the downlink transmission burst in the terminal, the UCI is reported on the unlicensed carrier that succeeds in contention.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s11, determining more than two candidate UCI reporting carriers corresponding to the unauthorized carrier used for reporting UCI by the terminal;

and S12, reporting the UCI by using the determined more than two candidate UCI reporting carriers.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s21, determining more than two candidate UCI reporting carriers for the unauthorized carrier used for reporting UCI by the terminal, wherein the more than two candidate UCI reporting carriers are used for reporting UCI by the terminal;

and S22, configuring the determined more than two candidate UCI reporting carriers to the terminal.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Optionally, in this embodiment, the processor executes the steps in the above method embodiments according to the program code stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for reporting uplink control information UCI is characterized by comprising the following steps:

determining more than two candidate UCI reporting carriers corresponding to the unauthorized carriers used for reporting the UCI by the terminal;

and reporting the UCI by using the determined more than two candidate UCI reporting carriers.

2. The method of claim 1, wherein determining the two or more candidate UCI reporting carriers corresponding to the unlicensed carrier for the terminal to report the UCI comprises:

and determining the more than two candidate UCI reporting carriers configured by the base station for the unauthorized carrier used for the terminal to report the UCI.

3. The method of claim 2, wherein determining the two or more candidate UCI reporting carriers configured by the base station for the unlicensed carrier used for the terminal to report the UCI comprises at least one of:

determining the more than two candidate UCI reporting carriers through a received Radio Resource Control (RRC) message from the base station;

determining an activated carrier in carriers configured by the base station as the more than two candidate UCI reporting carriers;

determining the more than two candidate UCI reporting carriers through a display signaling received from the base station, wherein the display signaling is carried in one of the following manners: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

4. The method of claim 1, wherein reporting the UCI using the determined two or more candidate UCI reporting carriers comprises:

when the base station carries out the scheduled time after the downlink transmission burst on the carrier wave successfully competed in advance in the more than two candidate UCI reporting carrier waves, the base station reports the UCI on the carrier wave successfully competed by the base station; or,

and executing CCA (clear channel assessment) on the determined more than two candidate UCI reporting carriers, and reporting the UCI on one of the more than two candidate UCI reporting carriers according to the execution result of executing the CCA.

5. The method of claim 4, wherein the manner of performing the CCA on the determined two or more candidate UCI reporting carriers comprises one of:

performing a fixed CCA for a CCA detection duration;

performing a CCA with a backoff value of N ═ 1 or N ═ 2 for more than two CCA detection periods;

the CCA is performed one or more times within a predefined UCI transmission time window or a UCI transmission time window configured by the base station.

6. The method of claim 5, wherein the CCA is performed at a time domain position of a last symbol of a previous subframe of a UCI transmission subframe or a first symbol of a UCI transmission subframe.

7. The method of claim 5, wherein the predefined UCI transmission time window comprises at least one of: a periodic or aperiodic UCI transmission timing subframe, a qth subframe preceding the periodic or aperiodic UCI transmission timing subframe, and a qth subframe following the periodic or aperiodic UCI transmission timing subframe, wherein q is 1 or 2.

8. The method of claim 4, wherein reporting the UCI on one of the two or more candidate UCI reporting carriers according to the result of performing the CCA comprises at least one of:

when the CCA is successfully executed on more than two candidate UCI reporting unauthorized carriers, selecting the carrier with the minimum carrier index, the highest carrier priority, the best channel condition or service data scheduling for reporting the UCI;

reporting the UCI on a first carrier which successfully executes the CCA, wherein when no uplink service data is sent on the rest other carriers, the CCA is stopped being executed on the other carriers;

and when the CCA is not successfully executed on multiple unauthorized carriers in the more than two candidate UCI reporting carriers which are predefined or indicated by the base station through signaling at the timing moment of non-periodic or periodic UCI reporting, reporting the UCI on authorized carriers in the more than two candidate UCI reporting carriers.

9. The method of claim 8, comprising at least one of:

when no scheduling service data is sent on the selected carrier wave for reporting the UCI, the UCI is reported independently with the maximum sending power through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH);

when scheduling service data are sent on the selected carrier wave for reporting the UCI, reporting the UCI through a PUCCH;

and for other unselected carriers which do not report the UCI and execute the CCA successfully, if scheduled service data are transmitted, transmitting the scheduled service data.

10. The method of claim 1, wherein reporting the UCI using the determined two or more candidate UCI reporting carriers comprises:

after determining that at least one of the following trigger conditions for reporting the UCI is reached, reporting the UCI by using the determined more than two candidate UCI reporting carriers: and determining to send acknowledgement character ACK and/or non-acknowledgement character NACK according to the timing relation, periodic channel state information CSI report and non-periodic CSI report triggered by the base station.

11. The method of claim 10, wherein the request information corresponding to the aperiodic CSI report triggered by the base station is carried by DCI (downlink control information) and is sent on a CSI request carrier or one or more configured candidate UCI feedback carriers.

12. The method of claim 1, comprising at least one of:

the reporting mode of the channel state information CSI in the UCI is configured semi-statically through high-level signaling;

the reporting of the channel quality indicator CQI in the UCI is predefined as broadband CQI reporting;

the channel quality indicator CQI in the UCI is the latest channel measurement value;

the UCI comprises UCI corresponding to a carrier used for reporting the UCI and/or UCI of all feedback carriers configured in the carrier used for reporting the UCI in a predefined UCI sending time window.

13. The method of claim 2, wherein when reporting the UCI, the method further comprises at least one of:

reporting the UCI in a Physical Uplink Control Channel (PUCCH) and/or a Physical Uplink Shared Channel (PUSCH) on an unlicensed carrier;

the periodic UCI and the aperiodic UCI are reported in a Physical Uplink Shared Channel (PUSCH) on an unauthorized carrier, wherein when the periodic UCI is reported, the base station distributes reported resources and Modulation Coding Strategies (MCS) to the unauthorized carrier through a semi-persistent scheduling (SPS); when reporting the aperiodic UCI, the base station dynamically allocates reported resources and modulation coding strategy MCS to the PUSCH on the unauthorized carrier wave through downlink control information DCI;

reporting the UCI in a Physical Uplink Shared Channel (PUSCH) on an unlicensed carrier, wherein the unlicensed carrier only supports the reporting of aperiodic UCI;

reporting the UCI from the first symbol or the second symbol or the 8 th symbol of a subframe in which a carrier used for reporting the UCI is positioned.

14. The method of claim 13, wherein when the UCI is carried on the PUCCH on the unlicensed carrier and is not transmitted simultaneously with the PUSCH, the PUCCH resource mapping method comprises at least one of:

modifying the mapping interval of subcarriers to M subcarriers, and mapping the UCI to p equally-spaced Physical Resource Blocks (PRBs), wherein M is a positive integer, and p is a positive integer;

the requirement that 80% bandwidth resources are occupied when the PUCCH is transmitted is achieved through filling a preamble, or demodulating a reference signal (DMRS), or sounding a reference signal (SRS), or through a UCI frequency domain repetition mode.

15. A method for reporting uplink control information UCI is characterized by comprising the following steps:

determining more than two candidate UCI reporting carriers for an unauthorized carrier used for reporting UCI by a terminal, wherein the more than two candidate UCI reporting carriers are used for reporting the UCI by the terminal;

and configuring the determined more than two candidate UCI reporting carriers to the terminal.

16. The method of claim 15, wherein configuring the determined two or more candidate UCI reporting carriers to the terminal comprises at least one of:

configuring the more than two candidate UCI reporting carriers to the terminal through a Radio Resource Control (RRC) message;

configuring the more than two candidate UCI reporting carriers to the terminal in a mode of configuring activated carriers in the carriers;

configuring the more than two candidate UCI reporting carriers to the terminal through a display signaling, wherein the display signaling is carried in one of the following modes: downlink control information DCI signaling, physical hybrid automatic repeat indicator channel PHICH channel resources and physical control format indicator channel PCFICH channel resources.

17. The method of claim 15, wherein after configuring the determined two or more candidate UCI reporting carriers to the terminal, the method further comprises:

and performing downlink transmission burst on an unauthorized carrier which is successfully contended in advance in the more than two candidate UCI reporting carriers, wherein the downlink transmission burst is used for reporting the UCI on the unauthorized carrier which is successfully contended after a preset time after indicating the downlink transmission burst in the terminal.

18. A reporting device of uplink control information UCI is characterized by comprising:

the terminal comprises a first determining module, a second determining module and a third determining module, wherein the first determining module is used for determining more than two candidate UCI reporting carriers corresponding to unauthorized carriers used for reporting UCI by the terminal;

and a reporting module, configured to report the UCI by using the determined two or more candidate UCI reporting carriers.

19. A reporting device of uplink control information UCI is characterized by comprising:

a second determining module, configured to determine, for an unlicensed carrier used for a terminal to report UCI, more than two candidate UCI reporting carriers, where the more than two candidate UCI reporting carriers are used for the terminal to report the UCI;

and a configuration module, configured to configure the determined more than two candidate UCI reporting carriers to the terminal.