CN107181577B

CN107181577B - Method and device for transmitting uplink feedback information

Info

Publication number: CN107181577B
Application number: CN201610133811.8A
Authority: CN
Inventors: 杨立
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-03-09
Filing date: 2016-03-09
Publication date: 2022-03-01
Anticipated expiration: 2036-03-09
Also published as: CN107181577A; WO2017152645A1

Abstract

The invention provides a method and a device for transmitting uplink feedback information, wherein the method comprises the following steps: the method comprises the steps that a terminal receives configuration information sent by an authorized auxiliary access main cluster LAA-MCG side of a network side, the terminal receives a downlink data block on an unauthorized carrier wave from the LAA-SCG side of the network side, UCI corresponding to the downlink data block is sent to the network side in an uplink mode on one or more uplink candidate subframes of the LAA-MCG side, the problem that an auxiliary base station LAA-SeNB cannot obtain UCI auxiliary information through an authorized carrier wave in time and downlink data transmission performance of the LAA-SCG side is affected is solved, and downlink data transmission efficiency of an LTE system on the unauthorized carrier wave is improved.

Description

Method and device for transmitting uplink feedback information

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting uplink feedback information.

Background

In the related art, communication networks of Long Term Evolution (Long Term Evolution, abbreviated as LTE) are all deployed on authorized carriers for operation, and with the development of LTE, some companies propose "to propose to research the subject of LTE deployment on unlicensed carriers", for example, the companies in the united states in the high traffic industry consider that: with the rapid growth of data traffic, the resources of the licensed carriers will not be able to withstand the huge amount of data brought by the rapid traffic growth in the near future. The data volume pressure brought by service growth can be solved by deploying the LTE service cell on the unlicensed carrier to share the data flow in the licensed carrier; this is the Enhanced Assisted authorized Access (e) LAA technology that is being researched and developed by the 3rd Generation Partnership Project (3 GPP) standard organization.

The unlicensed carrier has the following characteristics: on one hand, because the unauthorized carrier does not need an operator to bid for purchase, or the carrier resource has zero cost, the unauthorized carrier can be utilized free of charge or at low cost; on the other hand, individuals and enterprises can also participate in the deployment of related network equipment, so the requirement on the admission condition of the unauthorized carrier is low; furthermore, the unlicensed carrier has fair sharing performance, and the utilization efficiency of carrier resources can be improved when a plurality of systems of different systems are shared and operated in the system, or different operators of the system of the same system are shared and operated in the system.

In summary, although the LTE technology has obvious commercial advantages when deployed on an unlicensed carrier, there still exists a problem in the process of deployment and operation; among them, there are many types of radio access technologies (communication standards across different systems, difficult cooperation between radio nodes, and various network topologies) and many radio access sites (large number of users, large difficulty in cooperation, and large centralized management overhead), and therefore, for LTE deployment on an unlicensed carrier, regulatory regulations for supporting the use of the unlicensed carrier are required. Most countries require that any communication system be deployed on unlicensed carriers, and a basic mechanism for supporting Listen Before Talk (LBT) is required. Interference and collision between adjacent wireless systems caused by simultaneous use of local unlicensed carrier resources can be avoided by listen-before-talk. In order to further reduce the probability of collision and interference, a random contention backoff mechanism is introduced, that is, adjacent system stations (generally, adjacent transmission nodes of the same system) may avoid interference caused when the adjacent transmission nodes of the same system use an unlicensed carrier at the same time through the contention backoff mechanism. Regulation and regulation: any device using an unlicensed carrier resource (including an LTE base station and a User Equipment (UE)) needs to perform an LBT operation (i.e., Clear Channel Assessment (CCA)) before transmitting, and the device can use the unlicensed carrier Channel to perform data transmission for a period of time when the Channel is idle. For example, the eNB may perform downlink data transmission only if it seizes a certain unlicensed carrier channel through LBT operation, and the UE may perform uplink data transmission only if it seizes a certain unlicensed carrier channel through LBT operation. The content transmitted here may be a user traffic data block, control information, or the like.

In the LTE system, a UE needs to perform feedback Acknowledgement (ACK)/non-acknowledgement (NACK) on whether a data block related to downlink data transmission of an eNB is successfully received, and also needs to feedback Channel State Information (CSI) in a past period of time to assist the eNB in scheduling (re) transmission of future data. The UCI may be transmitted in an Uplink through a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH). For example, the base station transmits a downlink data block in the PDSCH channel corresponding to the downlink subframe n, and the UE needs to transmit UCI information to the base station on a specific physical resource block of the PUSCH channel or the PUCCH channel corresponding to the uplink subframe n +4 after receiving and analyzing the UCI information.

In LTE, the uplink subframe position where the UE sends UCI feedback in a synchronous manner and the subframe position of the corresponding downlink data block sent by the base station keep an agreed subframe interval relationship, for example, a fixed subframe interval relationship of n +4 (the duration of each subframe of LTE is 1ms) in a Frequency Division Duplex (FDD); under Time Division Duplex (TDD for short), the agreed subframe interval relationship of n + x can also be determined according to a standardized table according to the specific uplink and downlink subframe configuration of TDD. The fixed subframe interval relationship is easily ensured and realized on the authorized carrier, because the uplink and downlink channel resources of the authorized carrier are completely controlled by the scheduling of the eNB, the eNB and the UE can ensure to transmit the relevant information at the appointed subframe position, fig. 1 is a schematic diagram of downlink scheduling transmission and uplink feedback according to the LTE FDD system in the related art, for example, in fig. 1, when the base station transmits a downlink data block to the UE in a subframe n, and the UE needs to transmit UCI feedback information in an appointed subframe n +4 in an uplink manner after receiving and analyzing the data block. However, the UCI feedback operation described above has the following problems for unlicensed carriers: fig. 2 is a schematic diagram of downlink scheduling transmission and uplink feedback of an LAA system according to the related art, for example, in fig. 1, when a base station transmits a downlink data block to a UE in a subframe n, and the UE also needs to transmit UCI information in a subframe n +4 after receiving and resolving the data block, but before the subframe n +4 arrives, the UE needs to perform LBT operation, i.e., CCA detection, before detecting that a channel of an unlicensed carrier is idle (energy in a detection channel is lower than a preset threshold), the UE can use the subframe n +4 to transmit UCI only when detecting that the channel of the unlicensed carrier is idle (energy in the detection channel is lower than the preset threshold), and the UE cannot use the subframe n +4 to transmit UCI when detecting that the channel is not idle (busy). When the latter occurs, the UE cannot transmit UCI feedback information in the subframe position agreed with the base station, and the eNB cannot know the downlink data transmission condition of the data block in the subframe n and CSI measurement information in the past period of time, and cannot perform further accurate downlink data scheduling.

For the problem that UCI uplink auxiliary information may not be transmitted in time due to LBT operation failure on an unlicensed carrier, the UCI uplink auxiliary information may be transmitted by using a PUSCH or PUCCH channel on the Licensed carrier, but this is only applicable to Licensed Assisted Access (LAA) operation of the same base station, because at this time, an LAA secondary serving cell (cells) on the unlicensed carrier and a serving cell on the Licensed carrier are co-located with a co-scheduler, and uplink feedback UCI received by a master base station (MeNB) from the Licensed carrier can quickly know the downlink data block transmission condition and CSI condition on the unlicensed carrier. However, for the LAA-DC operation, the secondary base station (LAA-SeNB) cannot obtain UCI auxiliary information in time through the authorized carrier, so that the downlink data transmission performance of the Licensed Assisted Access secondary Cell Group (LAA-SCG) side is affected.

Aiming at the problem that in the related art, the auxiliary base station LAA-SeNB cannot timely obtain UCI auxiliary information through an authorized carrier, so that the downlink data transmission performance of the LAA-SCG side is affected, no effective solution is provided at present.

Disclosure of Invention

The invention provides a transmission method and a device of uplink feedback information, which at least solve the problem that the transmission performance of downlink data at an LAA-SCG side is influenced because an auxiliary base station LAA-SeNB cannot timely obtain UCI auxiliary information through an authorized carrier in the related technology.

According to an aspect of the present invention, a method for transmitting uplink feedback information is provided, including:

a terminal receives configuration information sent by a Licensed Assisted Access Master Cell Group (LAA-MCG) side (i.e., a Master base station) of a network side, where the configuration information includes: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

the terminal receives a downlink data block on the unlicensed carrier from the LAA-SCG side (i.e. a secondary base station) of the network side, and sends UCI corresponding to the downlink data block to the network side in an uplink manner on the one or more uplink candidate subframes of the LAA-MCG side.

Further, the uplink transmitting, to the network side, UCI corresponding to the downlink data block on the one or more uplink candidate subframes on the LAA-MCG side includes:

and sending the UCI corresponding to the downlink data block to the LAA-MCG side, wherein the UCI corresponding to the unlicensed carrier of the LAA-SCG side is further transmitted to the LAA-SCG side through an X2 interface by the LAA-MCG side.

Further, the receiving the downlink data block on the unlicensed carrier from the LAA-SCG side includes:

preferentially receiving a downlink data block on an unlicensed carrier on the LAA-SCG side, wherein after receiving the downlink data block, transmitting UCI feedback corresponding to the downlink data block.

simultaneously uplink transmitting joint feedback UCI related to a plurality of downlink data blocks on one uplink candidate subframe of the one or more uplink candidate subframes, wherein the plurality of downlink data blocks comprise: before receiving downlink data blocks on the unlicensed carrier on the LAA-SCG side, the received downlink data blocks of the unlicensed carrier on the LAA-SCG side and the received downlink data blocks of other unlicensed carriers, where the joint feedback UCI includes: joint feedback Information indicating whether the plurality of downlink data blocks are successfully received and Channel State Information (CSI) indicating Channel reception observation times corresponding to the plurality of downlink data blocks.

Further, under the condition that the feedback information of the joint feedback UCI exceeds the capacity of the uplink subframe where the joint feedback UCI is located, the joint feedback UCI preferably carries a UCI corresponding to a downlink data block of an unlicensed carrier on the LAA-SCG side, wherein a coding mode of the joint feedback UCI including a plurality of UCI information adopts a carrier aggregation joint UCI coding mode.

Further, the transmission time location information of the one or more uplink candidate subframes includes: interval information of the plurality of uplink candidate subframes, the interval information including: the number of the spaced uplink subframes, and the spacing information indicates a time dimension spacing between uplink transmission time of the subframe where the UCI is located and reception time of the subframe where the downlink data block is located.

Further, the time dimension interval is determined by a delay time size of X2 between the LAA-SCG side and the LAA-MCG side, wherein a sum of the X2 delay time and the time dimension interval is less than or equal to a system-predetermined UCI feedback delay time length.

Further, after the delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds a predetermined UCI feedback delay Threshold, the terminal is in an area that does not support a Short Control Signal (SCS) mechanism, and the configuration information further carries a predetermined Clear Channel Assessment Threshold (CCA), which is referred to as CCA), where the CCA-EDTL is higher than a preset general CCA Detection Threshold;

after the delay time of the X2 between the LAA-SCG side and the LAA-MCG side exceeds the predetermined UCI feedback delay threshold, the terminal compresses an uplink subframe where the UCI is located into a short control signal frame which meets SCS conditions and is supported by a system in an area supporting an SCS mechanism, wherein the UCI is directly transmitted uplink on an unlicensed carrier at the LAA-SCG side by using the short control signal frame without LBT operation.

Further, the configuration information is carried in a dedicated Radio Resource Control (RRC) message or an RRC message broadcasted by the system.

According to another aspect of the present invention, there is also provided a method for transmitting uplink feedback information, including:

the LAA-MCG side at the network side sends configuration information to the terminal, wherein the configuration information comprises: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

and sending a downlink data block on the unlicensed carrier to the terminal on an unlicensed carrier secondary serving cell on the LAA-SCG side of the network side, and receiving UCI corresponding to the downlink data block by the main base station LAA-MeNB on one or more uplink candidate subframes on the LAA-MCG side of the network side.

Further, after receiving the UCI sent by the terminal in the uplink, the LAA-MCG side further transfers the UCI corresponding to the unlicensed carrier on the LAA-SCG side to the LAA-SCG side through an X2 interface.

Further, the transmission time location information of the one or more uplink candidate subframes includes: interval information of the plurality of uplink candidate subframes, the interval information including: the number of the subframes at intervals, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

Further, the LAA-MCG side of the network side derives UCI corresponding to the unlicensed carrier of the LAA-SCG side according to the interval information and the physical layer control information.

Further, after the LAA-SCG side does not receive the UCI corresponding to the unlicensed carrier on the LAA-SCG side sent by the LAA-MCG side through the X2 interface at the predetermined UCI feedback delay time, sending an out-of-synchronization message to the LAA-SCG side, where the out-of-synchronization message is used to instruct the LAA-SCG side to update and adjust the timing for sending the UCI.

Further, the configuration information also carries an energy detection threshold CCA-EDTL of a predetermined clear channel assessment CCA, where the CCA-EDTL is higher than a preset general CCA detection threshold.

Further, the configuration information is carried in a dedicated radio resource control information RRC message or an RRC message broadcasted by the system.

According to another aspect of the present invention, there is also provided an apparatus for transmitting uplink feedback information, where the apparatus is located in a terminal, and the apparatus includes:

a first receiving module, configured to receive configuration information sent by an authorized assisted access master group LAA-MCG side of a network side, where the configuration information includes: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

a second receiving module, configured to receive a downlink data block on the unlicensed carrier from the LAA-SCG side of the network side;

a first sending module, configured to send UCI corresponding to the downlink data block to the network side in an uplink manner on the one or more uplink candidate subframes on the LAA-MCG side.

Further, the first sending module is configured to send UCI corresponding to the downlink data block to the LAA-MCG side, where the LAA-MCG side further transfers the UCI corresponding to the unlicensed carrier on the LAA-SCG side to the LAA-SCG side through an X2 interface.

Further, the second receiving module is further configured to preferentially receive a downlink data block on an unlicensed carrier on the LAA-SCG side, where after receiving the downlink data block, the second receiving module is configured to send UCI feedback corresponding to the downlink data block.

Further, the first sending module is further configured to simultaneously send, in an uplink candidate subframe of the one or more uplink candidate subframes, uplink joint feedback UCI related to a plurality of downlink data blocks, where the plurality of downlink data blocks include: before receiving downlink data blocks on the unlicensed carrier on the LAA-SCG side, the received downlink data blocks of the unlicensed carrier on the LAA-SCG side and the received downlink data blocks of other unlicensed carriers, where the joint feedback UCI includes: joint feedback information indicating whether the plurality of downlink data blocks are successfully received and Channel State Information (CSI) indicating channel reception observation time corresponding to the plurality of downlink data blocks.

Further, the transmission time location information of the one or more uplink candidate subframes includes: interval information of the one or more uplink candidate subframes, the interval information including: the number of the subframes at intervals, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

Further, after the delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds a predetermined UCI feedback delay threshold, the terminal is in an area that does not support a short control frame SCS mechanism, and the configuration information also carries an energy detection threshold CCA-EDTL of a predetermined clear channel assessment CCA, where the CCA-EDTL is higher than a preset general CCA detection threshold;

According to another aspect of the present invention, there is also provided a device for transmitting uplink feedback information, where the device is located on a network side, and the device includes:

a second sending module, configured to send, to a terminal, configuration information to the LAA-MCG side on the network side, where the configuration information includes: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

a third sending module, configured to send, to the terminal, a downlink data block on an unlicensed carrier secondary serving cell on an LAA-SCG side of the network side;

a third receiving module, configured to receive, by the network-side master base station LAA-MeNB, UCI corresponding to the downlink data block on one or more uplink candidate subframes on the network-side LAA-MCG side.

Through the invention, the terminal receives the configuration information sent by the authorized auxiliary access master cluster LAA-MCG side (namely the master base station) of the network side, and the configuration information comprises: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG; the terminal receives the downlink data block on the unlicensed carrier from the LAA-SCG side (i.e. the secondary base station) of the network side, and sends UCI corresponding to the downlink data block to the network side in an uplink manner on the one or more uplink candidate subframes of the LAA-MCG side, so that the problem that the secondary base station LAA-SeNB cannot obtain UCI auxiliary information through the licensed carrier in due time to influence the downlink data transmission performance of the LAA-SCG side is solved, and the downlink data transmission efficiency of the LTE system on the unlicensed carrier 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 diagram illustrating downlink scheduling transmission and uplink feedback in an LTE FDD system according to the related art;

fig. 2 is a diagram illustrating downlink scheduling transmission and uplink feedback of an LAA system according to the related art;

fig. 3 is a first flowchart of a method for transmitting uplink feedback information according to an embodiment of the present invention;

fig. 4 is a flowchart ii of a method for transmitting uplink feedback information according to an embodiment of the present invention;

fig. 5 is a block diagram of a first structure of an apparatus for transmitting uplink feedback information according to an embodiment of the present invention;

fig. 6 is a block diagram of a second structure of an apparatus for transmitting uplink feedback information according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an uplink auxiliary information transmission mode 1 on the LAA-SeNB side in the LAA-DC system according to the preferred embodiment of the present invention;

fig. 8 is a schematic diagram of an uplink auxiliary information transmission mode 2 on the LAA-SeNB side in the LAA-DC system according to the preferred embodiment of the present invention;

fig. 9 is a schematic illustration of LAA-DC deployment of two LAA cells on Pcell + unlicensed carrier on the licensed carrier in accordance with the preferred embodiment of the present invention;

fig. 10 is a schematic diagram of LAA system downlink scheduling transmission and uplink feedback according to the preferred embodiment 1of the present invention;

fig. 11 is a first schematic diagram of LAA-DC deployment of three LAA cells on Pcell + unlicensed carrier on a licensed carrier in accordance with the preferred embodiment of the present invention;

fig. 12 is a schematic diagram of LAA system downlink scheduling transmission and uplink feedback according to the preferred embodiment 2 of the present invention;

fig. 13 is a diagram two of the LAA-DC deployment of three LAA Scells on Pcell + unlicensed carrier in accordance with the preferred embodiment of the present invention;

fig. 14 is a schematic diagram of LAA system downlink scheduling transmission and uplink feedback according to the preferred embodiment 3 of the present invention;

fig. 15 is a third schematic diagram of LAA-DC deployment of three LAA Scells on Pcell + unlicensed carrier in accordance with the preferred embodiment of the present invention;

fig. 16 is a schematic diagram of the LAA system downlink scheduling transmission and uplink feedback according to the preferred embodiment 3 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 transmitting uplink feedback information is provided, and fig. 3 is a first flowchart of a method for transmitting uplink feedback information according to an embodiment of the present invention, as shown in fig. 3, the process includes the following steps:

step S302, the terminal receives configuration information sent by an authorized assisted access master group LAA-MCG side (i.e. a master base station) of the network side, where the configuration information includes: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

step S304, the terminal receives the downlink data block on the unlicensed carrier from the LAA-SCG side (i.e. the secondary base station) of the network side, and sends UCI corresponding to the downlink data block to the network side in uplink on the one or more uplink candidate subframes of the LAA-MCG side.

Through the steps, the terminal receives the configuration information sent by the authorized auxiliary access main cluster LAA-MCG side of the network side, receives the downlink data block on the unauthorized carrier wave from the LAA-SCG side of the network side, and sends the UCI corresponding to the downlink data block to the network side in the uplink on the one or more uplink candidate subframes of the LAA-MCG side, so that the problem that the auxiliary base station LAA-SeNB cannot obtain the UCI auxiliary information timely through the authorized carrier wave, so that the downlink data transmission performance of the LAA-SCG side is influenced is solved, and the downlink data transmission efficiency of the LTE system on the unauthorized carrier wave is improved.

In an embodiment of the present invention, the uplink sending, to the network side, UCI corresponding to the downlink data block on the one or more uplink candidate subframes on the LAA-MCG side includes:

and sending the UCI corresponding to the downlink data block to the LAA-MCG side, wherein the UCI corresponding to the unlicensed carrier of the LAA-SCG side is further transferred to the LAA-SCG side through an X2 interface by the LAA-MCG side.

In an embodiment of the present invention, the receiving the downlink data block on the unlicensed carrier from the LAA-SCG side includes:

In the embodiment of the present invention, when the feedback information of the joint feedback UCI exceeds the capacity of the uplink subframe where the joint feedback UCI is located, the joint feedback UCI preferably carries a UCI corresponding to a downlink data block of an unlicensed carrier on the LAA-SCG side, wherein a coding mode of the joint feedback UCI including a plurality of UCI information adopts a carrier aggregation joint UCI coding mode.

In an embodiment of the present invention, the transmission time location information of the one or more uplink candidate subframes includes: interval information of the plurality of uplink candidate subframes, the interval information including: the number of the spaced uplink subframes, and the spacing information indicates a time dimension spacing between uplink transmission time of the subframe where the UCI is located and reception time of the subframe where the downlink data block is located.

In an embodiment of the present invention, the time dimension interval is determined by a delay time size of X2 between the LAA-SCG side and the LAA-MCG side, wherein a sum of the X2 delay time and the time dimension interval is less than or equal to a UCI feedback delay time length predetermined by the system.

In the embodiment of the present invention, after the delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds a predetermined UCI feedback delay Threshold, the terminal is in an area that does not support a Short Control Signal (SCS) mechanism, and the configuration information further carries a predetermined Clear Channel Assessment Threshold (CCA), which is referred to as CCA-EDTL for Short, where the CCA-EDTL is higher than a preset general CCA Detection Threshold;

after the delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds the predetermined UCI feedback delay threshold, the terminal compresses the uplink subframe where the UCI is located into a short control signal frame that meets SCS conditions and is supported by the system in an area supporting an SCS mechanism, wherein the UCI is transmitted uplink by using the short control signal frame directly on the unlicensed carrier on the LAA-SCG side without LBT operation.

In the embodiment of the present invention, the configuration information is carried in a dedicated Radio Resource Control (RRC) message or an RRC message broadcasted by the system.

In this embodiment, a transmission method of uplink feedback information is provided, and fig. 4 is a second flowchart of the transmission method of uplink feedback information according to the embodiment of the present invention, as shown in fig. 4, the process includes the following steps:

step S402, the LAA-MCG side of the network side sends configuration information to the terminal, and the configuration information comprises: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

step S404, on the secondary serving cell of the unlicensed carrier on the LAA-SCG side of the network side, sending the downlink data block on the unlicensed carrier to the terminal, and on one or more uplink candidate subframes on the LAA-MCG side of the network side, the main base station LAA-MeNB on the network side receives UCI corresponding to the downlink data block.

Through the steps, the LAA-MCG side of the network side sends configuration information to the terminal, the downlink data block on the unlicensed carrier is sent to the terminal on the unlicensed carrier secondary serving cell of the LAA-SCG side of the network side, and the main base station LAA-MeNB of the network side receives UCI corresponding to the downlink data block on one or more uplink candidate subframes of the LAA-MCG side of the network side, so that the problem that the downlink data transmission performance of the LAA-SCG side is affected because the auxiliary base station LAA-SeNB cannot timely obtain UCI auxiliary information through the licensed carrier is solved, and the downlink data transmission efficiency of the LTE system on the unlicensed carrier is improved.

In the embodiment of the present invention, after receiving the UCI sent by the terminal in uplink, the LAA-MCG side further transfers the UCI corresponding to the unlicensed carrier on the LAA-SCG side to the LAA-SCG side through an X2 interface.

In an embodiment of the present invention, the transmission time location information of the one or more uplink candidate subframes includes: interval information of the plurality of uplink candidate subframes, the interval information including: the number of the subframes of the interval, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

In the embodiment of the invention, the LAA-MCG side of the network side derives the UCI corresponding to the unlicensed carrier of the LAA-SCG side according to the interval information and the physical layer control information.

In the embodiment of the present invention, after the LAA-SCG side does not receive the UCI corresponding to the unlicensed carrier on the LAA-SCG side sent by the LAA-MCG side through the X2 interface at the predetermined UCI feedback delay time, the LAA-SCG side sends an out-of-synchronization message to the LAA-MCG side, where the out-of-synchronization message is used to instruct the LAA-MCG side to update and adjust the timing for sending the UCI.

In an embodiment of the present invention, the configuration information further carries an energy detection threshold CCA-EDTL for a predetermined clear channel assessment CCA, where the CCA-EDTL is higher than a preset general CCA detection threshold.

In the embodiment of the present invention, the configuration information is carried in a dedicated radio resource control information RRC message or an RRC message broadcasted by the system.

In this embodiment, a transmission apparatus for uplink feedback information is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description already made is omitted for brevity. 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. 5 is a block diagram of a first structure of an apparatus for transmitting uplink feedback information according to an embodiment of the present invention, which is located on a terminal, and as shown in fig. 5, the apparatus includes:

a first receiving module 52, configured to receive configuration information sent by an authorized assisted access master group LAA-MCG side of a network side, where the configuration information includes: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

a second receiving module 54, configured to receive a downlink data block on the unlicensed carrier from the LAA-SCG side of the network side;

a first sending module 56, configured to send UCI corresponding to the downlink data block to the network side in an uplink manner on the one or more uplink candidate subframes on the LAA-MCG side.

Through the above apparatus, the first receiving module 52 is configured to receive configuration information sent by an authorized secondary access master group LAA-MCG side of a network side, where the configuration information includes: the uplink control information comprises sending time position information of one or more uplink candidate subframes, the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on an LAA-SCG side of an authorized assisted access assisting area group, the second receiving module 54 is used for receiving a downlink data block on the unlicensed carrier on the LAA-SCG side from the network side, and the first sending module 56 is used for sending the UCI corresponding to the downlink data block to the network side in an uplink mode on the one or more uplink candidate subframes on the LAA-MCG side, so that the problem that the downlink data transmission performance on the LAA-SCG side is affected due to the fact that a secondary base station LAA-SeNB cannot timely obtain the UCI auxiliary information through the licensed carrier is solved, and the downlink data transmission efficiency of an LTE system on the unlicensed carrier is improved.

In an embodiment of the present invention, the first sending module 56 is configured to send UCI corresponding to the downlink data block to the LAA-MCG side, where the LAA-MCG side further transfers the UCI corresponding to the unlicensed carrier on the LAA-SCG side to the LAA-SCG side through an X2 interface.

In this embodiment of the present invention, the second receiving module 56 is further configured to preferentially receive a downlink data block on the unlicensed carrier on the LAA-SCG side, where after receiving the downlink data block, the second receiving module sends UCI feedback corresponding to the downlink data block.

In an embodiment of the present invention, the first sending module 56 is further configured to simultaneously uplink send, on an uplink candidate subframe of the one or more uplink candidate subframes, joint feedback UCI related to a plurality of downlink data blocks, where the plurality of downlink data blocks include: before receiving downlink data blocks on the unlicensed carrier on the LAA-SCG side, the received downlink data blocks of the unlicensed carrier on the LAA-SCG side and the received downlink data blocks of other unlicensed carriers, where the joint feedback UCI includes: joint feedback information indicating whether the plurality of downlink data blocks are successfully received and Channel State Information (CSI) indicating channel reception observation times corresponding to the plurality of downlink data blocks.

In an embodiment of the present invention, the transmission time location information of the one or more uplink candidate subframes includes: interval information of the one or more uplink candidate subframes, the interval information including: the number of the subframes of the interval, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

In the embodiment of the present invention, after the delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds a predetermined UCI feedback delay threshold, the terminal is in an area that does not support a short control frame SCS mechanism, and the configuration information further carries an energy detection threshold CCA-EDTL of a predetermined clear channel assessment CCA, where the CCA-EDTL is higher than a preset general CCA detection threshold;

Fig. 6 is a block diagram of a second structure of an apparatus for transmitting uplink feedback information according to an embodiment of the present invention, located on a network side, as shown in fig. 6, the apparatus includes:

a second sending module 62, configured to send configuration information to the terminal from the LAA-MCG side on the network side, where the configuration information includes: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

a third sending module 64, configured to send, to the terminal, a downlink data block on the unlicensed carrier on the secondary serving cell of the unlicensed carrier on the LAA-SCG side of the network side;

a third receiving module 66, configured to receive, at one or more uplink candidate subframes on the LAA-MCG side of the network side, UCI corresponding to the downlink data block by the network-side master base station LAA-MeNB.

Through the above apparatus, the second sending module 62 is configured to send, to the terminal, configuration information to the LAA-MCG side on the network side, where the configuration information includes: sending time and location information of one or more uplink candidate subframes, where the one or more uplink candidate subframes are used to send uplink control information UCI of an unlicensed carrier on the LAA-SCG side of a licensed-assisted access control group, a third sending module 64 is used to send downlink data blocks on the unlicensed carrier to the terminal on an unlicensed carrier serving cell on the LAA-SCG side of the network side, a third receiving module 66 is used to send downlink data blocks on the unlicensed carrier to one or more uplink candidate subframes on the LAA-MCG side of the network side, the main base station LAA-MeNB on the network side receives the UCI corresponding to the downlink data block, thereby solving the problem that the auxiliary base station LAA-SeNB can not obtain the UCI auxiliary information through the authorized carrier wave at the right time, therefore, the problem of downlink data transmission performance of the LAA-SCG side is influenced, and the downlink data transmission efficiency of the LTE system on the unauthorized carrier wave is improved.

The present invention will be described in detail with reference to preferred examples and embodiments.

When the LTE system works on an unlicensed carrier and there is downlink data block transmission, due to LBT regulatory requirements, the UE uplink UCI information feedback may not be sent at the current predetermined n +4 subframe position (or other subframe positions agreed by the system), so that the base station cannot receive UCI feedback at a proper time, which is particularly serious for the LAA-SeNB base station under LAA-DC operation. By introducing the UCI feedback enhancement mechanism in the preferred embodiment of the invention, the LAA-SeNB base station can timely receive the UCI information at the position of the n +4 subframe (or other subframe positions appointed by the system), thereby improving the downlink data transmission efficiency of the LTE system on the unauthorized carrier.

In a scenario where an X2 interface delay between the LAA-MeNB and the LAA-SeNB is <4ms, fig. 7 is a schematic diagram of an uplink auxiliary information transmission method 1 on the LAA-SeNB side in the LAA-DC system according to a preferred embodiment of the present invention, as shown in fig. 7, the preferred embodiment includes:

for a certain downlink data block on a certain unlicensed carrier at the LAA-SCG side, the network side configures a certain UCI on a certain licensed carrier at the LAA-MCG side for the UE to send subframe position information or uplink candidate subframe interval information. The interval between the uplink candidate subframe and the corresponding downlink data block subframe is less than 4ms and other early appointed intervals.

And the UE allows the data block sent down from the non-authorized carrier wave at the LAA-SCG side to be preferentially received and analyzed to generate a corresponding UCI result, and then sends UCI information at the position of the uplink candidate subframe configured at the network side.

The UE may perform joint feedback of UCI on multiple downlink data blocks simultaneously in a certain uplink candidate subframe, that is, UCI information in the same subframe includes joint feedback of a data block previously sent from an LAA-SCG side unlicensed carrier and data blocks sent from other licensed carriers on a network side, and CSI measurement information in a past period of channel reception observation time.

The network side LAA-MeNB tries to receive UCI auxiliary information at the position of the uplink candidate subframe; the network side needs to be able to confirm and extract the part of UCI information corresponding to the data block previously sent from the LAA-SCG side unlicensed carrier from the received UCI combination information.

And the LAA-MeNB quickly transmits the part of UCI information corresponding to the data block transmitted on the unauthorized carrier wave on the LAA-SCG side to the LAA-SeNB through an X2 interface, so that the LAA-SeNB can receive the UCI information corresponding to the downlink data block of the LAA-SeNB at the current preset n +4 subframe position (or other subframe positions appointed by the system). Thus, from the perspective of LAA-SeNB, it is equivalent to receive UCI information corresponding to its own downlink data block at a predetermined n +4 subframe position (or other subframe position agreed by the system) directly from the air interface of LAA-SCG.

The UCI transmission subframe position information or the uplink candidate subframe interval information describes the time dimension interval between the uplink UCI auxiliary information and the downlink data block on the corresponding unlicensed carrier. The time dimension interval may be described by the number of subframes of the interval, for example, the number of subframes of the time dimension interval agreed by default in the current FDD system is 4, and in the present invention, the value should be less than 4, such as candidate value under LTE FDD system: 1,2,3.

The network side may configure the time dimension interval information for the UE through a UE-specific RRC message or a system broadcast RRC message. The configuration value depends on the X2 delay between the connections LAA-MeNB and LAA-SeNB, ensuring that X2 delay + the above time dimension interval is 4ms (or other subframe position agreed by the system).

Because the UE is in the same subframe position, a plurality of downlink data blocks can be received from a plurality of aggregated carriers at the same time, and because the base band processing capability of the UE is limited, the data blocks transmitted from the unauthorized carrier on the LAA-SCG side are preferentially received and analyzed as soon as possible, and the UCI result is generated in advance; and if the UE cannot generate the UCI at the UCI subframe position configured at the network side, abandoning to send the UCI at the UCI subframe position.

Because the UCI combined feedback information cannot be accumulated infinitely due to the limitation of the channel resource capacity in single subframes of the PUSCH and the PUCCH, when the subframe capacity is exceeded, the UCI information corresponding to the feedback and the data block sent down on the unlicensed carrier wave at the LAA-SCG side is carried preferentially.

On the basis of the time dimension interval configured by the RRC high layer signaling, the network side LAA-MeNB may derive, through the physical layer control information, a part of UCI information corresponding to a data block transmitted on an unlicensed carrier at the LAA-SCG side, that is, which UCI information needs to be further transmitted to the LAA-SeNB through the X2 interface.

The LAA-MeNB transfers the relevant UCI information to the LAA-SeNB through the X2 proprietary bearer, and the time sequence of the UCI arriving at the LAA-SeNB needs to be ensured to just meet the preset n +4 subframe position (or other subframe positions appointed by the system) from the LAA-SeNB perspective. The LAA-SeNB needs to be able to deduce to which LAA-SCG side unlicensed carriers the UCI information received from the LAA-MeNB corresponds to the data blocks sent down.

If the LAA-SeNB can not receive the corresponding UCI information at the preset subframe position, the situation that the LAA-MeNB receives the UCI and is out of synchronization is informed through an X2 proprietary message, and then the LAA-MeNB needs to adjust the UCI transmission timing in the future.

In a scenario facing an X2 interface delay between the LAA-MeNB and the LAA-SeNB of >4ms (or other subframe locations agreed by the system), fig. 8 is a schematic diagram of an uplink auxiliary information transmission manner 2 on the LAA-SeNB side in the LAA-DC system according to a preferred embodiment of the present invention, as shown in fig. 8, the embodiment of this embodiment includes:

since the delay of the X2 interface is >4ms (or other subframe positions agreed by the system), the method 1 cannot be applied, and in order to still maintain the relative relationship between the downlink data block transmission and the uplink feedback n +4 subframe positions (or other subframe positions agreed by the system) on the LAA-SeNB side, and only increase the success probability of the uplink LBT on the LAA-SCG side, there are two basic methods: 1: in an area which does not support an SCS mechanism, a network side configures a very high CCA detection threshold CCA-ED TL for a UE, namely, under the local small interference intensity of the UE, the UE can operate through a fast LBT with higher success probability, so that UCI information is transmitted on an unlicensed carrier configured on an LAA-SCG side at an n +4 subframe position (or other subframe positions appointed by a system). 2: in the region supporting the SCS mechanism, the UE compresses the uplink sub-frame containing UCI with the original time length of 1ms into a shorter small control signal frame which meets the applicable condition of SCS and is supported by the system, thus in some regions supporting the SCS mechanism, LBT operation can not be executed to directly transmit UCI information on the unlicensed carrier wave configured at the LAA-SCG side.

The network side can configure a very high CCA detection threshold specially serving for UCI signal uploading purpose through UE special RRC message, and the threshold is obviously higher than CCA detection thresholds of other transmission purposes.

The UE carries UCI information according to a new short frame mechanism (e.g. new subframe length is 0.5ms,0.1ms,1OFDM Sysbol, etc.) introduced by the LTE evolved system in the subsequent standardization, and directly transmits UCI information in uplink without performing LBT operation through the new short frame + SCS mechanism.

Example 1: fig. 9 is a schematic diagram of LAA-DC deployment of two LAA Scells on Pcell + unlicensed carrier on the licensed carrier according to the preferred embodiment of the present invention, and fig. 10 is a schematic diagram of downlink scheduling transmission and uplink feedback of the LAA system according to the preferred embodiment 1of the present invention, as shown in fig. 9 and fig. 10, an operator deploys and utilizes LAA-DC technology, there is Pcell serving cell macro coverage on the licensed carrier of LAA-MeNB, and connects to an LAA-SeNB base station through X2 at a far end (estimated total delay is 2ms), and the LAA-SeNB has two LAA Scells deployed on the unlicensed carrier for hot spot capacity enhancement. The UE is under the public coverage of Pcell + LAA Scell1+ LAA Scell2 at a certain time, so that the main base station LAA-MeNB decides that LAA-DC operation is configured for the UE to carry out downlink data distribution, and the UE can simultaneously receive and transmit data from and send data from the uplink and the downlink of two radio links LAA MCG-link and LAA SCG-link. The LAA-SeNB base station performs self-carrier scheduling on LAA cells and supports the capability of the mode 1of the present invention, and the UE also supports the mode 1of the present invention, because there are other WLAN nodes on the unlicensed carrier frequency point where the LAA cells are located, they all need to contend for the local unlicensed carrier resource through LBT. The method comprises the following specific implementation steps:

step 1001: the LAA-MeNB configures the UE for LAA-DC dual Connection operation through RRC message RRC Connection Reconfiguration, and performs shunt transmission of downlink data blocks on the LAA-SCG side. And further configuring the LAA-SeNB and the UE to transmit the related auxiliary UCI information in an uplink mode through a PUCCH channel on the Pcell. The LAA-MeNB is configured to the UE that the UE receives the downlink data block at the sub-frame position {2} of the PUCCH on the Pcell, namely corresponding to the sub-frame N on the LAA Scell1/2, and the UE needs to send the UCI at the uplink sub-frame position of the PUCCH N +2 on the Pcell (the UE needs to preferentially analyze the downlink data block received on the LAA Scell1/2 and generate the corresponding UCI as soon as possible).

Step 1002: the LAA-SeNB successfully competes to a certain Transmission Burst resource through LBT operation, and the LAA-SeNB schedules and sends 1 data block in a downlink subframe N on the LAA Scell 1. After the UE successfully receives and analyzes the data block according to a new UCI feedback time sequence configured by the LAA-MeNB, the UE successfully generates the UCI as soon as possible before the position of the N +2 uplink subframe, and simultaneously performs the measurement of the CSI, and finally successfully generates the corresponding UCI information.

Step 1003: and according to the configuration of the LAA-MeNB, the UE successfully transmits UCI information to the LAA-MeNB in an uplink manner at the position of the PUCCH N +2 subframe on the Pcell.

Step 1004: the LAA-MeNB parses the received UCI information, confirms that the UCI information corresponds to the downlink data transmission of the LAA Scell1, further transmits the UCI information to the LAA-SeNB through an X2 interface, and informs the LAA-SeNB that the UCI information corresponds to the downlink transmission block transmission on the LAA Scell 1. The X2 interface may be conveyed in proprietary control plane messages or user plane bearers.

Step 1005: the LAA-SeNB successfully receives UCI information from the LAA-MeNB side at the preset subframe time of N +4, deduces that the UCI information corresponds to a data block which is transmitted in a downlink scheduling mode in a downlink subframe N on the LAA Scell1, and therefore the transmission result and the CSI situation in the past period of observation time are known.

Step 1006: as the LAA-SeNB continuously transmits data blocks in downlink on the LAA Scell1+ LAA Scell2, the above process is repeated continuously, and the UE does not need to perform uplink LBT operation (reduce contention for unlicensed carrier resources) on the LAA Scell1+ LAA Scell2, but feedback is guaranteed in time through the PUCCH channel of the Pcell.

Example 2: fig. 11 is a schematic diagram of LAA-DC deployment of three LAA Scells on Pcell + unlicensed carrier on the licensed carrier according to the preferred embodiment of the present invention, fig. 12 is a schematic diagram of downlink scheduling transmission and uplink feedback of the LAA system according to the preferred embodiment of the present invention 2, as shown in fig. 11 and fig. 12, an operator deploys and utilizes LAA-DC technology, there is Pcell serving cell macro coverage on the licensed carrier of LAA-MeNB, and a LAA-SeNB base station is connected at a far end through X2 (total estimated delay is 1ms), and the LAA-SeNB has three LAA Scells deployments on the unlicensed carrier for hot spot capacity enhancement. The UE is under the public coverage of Pcell + LAA Scell1+ LAA Scell2+ LAA Scell3 at a certain time, so that the main base station LAA-MeNB decides that LAA-DC operation is configured for the UE to carry out downlink data distribution, and the UE can simultaneously receive and transmit data from and send data from the uplink and the downlink of two radio links LAA MCG-link and LAA SCG-link. The LAA-SeNB base station performs self-carrier scheduling on LAA cells and supports the capability of the mode 1of the present invention, and the UE also supports the mode 1of the present invention, because there are other WLAN nodes on the unlicensed carrier frequency point where the LAA cells are located, they all need to contend for the local unlicensed carrier resource through LBT. The method comprises the following specific implementation steps:

step 1201: the LAA-MeNB configures the UE for LAA-DC dual Connection operation through RRC message RRC Connection Reconfiguration, and performs shunt transmission of downlink data blocks on the LAA-SCG side. And further configuring the LAA-SeNB and the UE to transmit the related auxiliary UCI information in an uplink mode through a PUCCH channel on the Pcell. The LAA-MeNB is configured to the UE that the UCI subframe position of the PUCCH on the Pcell is {3}, namely the UE corresponds to the downlink data block received at the subframe N moment on the LAA Scell1/2/3, and the UE needs to send the UCI at the PUCCH N +3 uplink subframe position on the Pcell (the UE needs to preferentially analyze the downlink data block received on the LAA Scell1/2/3 and generate the corresponding UCI as soon as possible).

Step 1202: the LAA-SeNB successfully competes to a certain Transmission Burst resource through LBT operation, and the LAA-SeNB schedules and sends 1 data block in each downlink subframe N on the LAA Scell 1/3. After the UE successfully receives and analyzes the two data blocks according to a new UCI feedback time sequence configured by the LAA-MeNB, the UE successfully generates the UCI as soon as possible before the position of the N +3 uplink subframe, and simultaneously performs the measurement of the CSI, and finally successfully generates the corresponding UCI information.

Step 1203: and according to the configuration of the LAA-MeNB, the UE successfully transmits UCI information to the LAA-MeNB in an uplink manner at the position of the PUCCH N +3 subframe on the Pcell.

Step 1204: the LAA-MeNB parses the received UCI information, confirms that the UCI information corresponds to the downlink data transmission of the LAA Scell1/3, further transmits the UCI information to the LAA-SeNB through an X2 interface, and informs the LAA-SeNB that the UCI information corresponds to the downlink transmission block transmission on the LAA Scell 1/3.

Step 1205: the LAA-SeNB successfully receives UCI information from the LAA-MeNB side at the preset subframe time of N +4, deduces that the UCI information corresponds to the data block which is respectively transmitted by the downlink scheduling of the downlink subframe N on the LAA Scell1/3, and therefore the transmission result and the CSI situation in the past period of observation time are known.

Step 1206: as the LAA-SeNB continuously transmits data blocks in downlink on the LAA Scell1+ LAA Scell2+ LAA Scell3, the above process is repeated continuously, and the UE does not need to perform uplink LBT operation (reduce contention for unlicensed carrier resources) on the LAA Scell1+ LAA Scell2+ LAA Scell3, but feedback guaranteed in due time through the PUCCH channel of the Pcell.

Example 3: fig. 13 is a schematic diagram of LAA-DC deployment of three LAA Scells on Pcell + unlicensed carrier on the licensed carrier according to the preferred embodiment of the present invention, fig. 14 is a schematic diagram of downlink scheduling transmission and uplink feedback of the LAA system according to the preferred embodiment of the present invention 3, as shown in fig. 13 and fig. 14, as shown in fig. 7a below, an operator deploys and utilizes LAA-DC technology in an area supporting SCS mechanism, has Pcell serving cell macro coverage on the licensed carrier of LAA-MeNB, connects the LAA-SeNB base station through X2 at the far end (estimated total delay is 5ms), and has three LAA Scells deployment on the unlicensed carrier for hot spot capacity enhancement. The UE is under the public coverage of Pcell + LAA Scell1+ LAA Scell2+ LAA Scell3 at a certain time, so that the main base station LAA-MeNB decides that LAA-DC operation is configured for the UE to carry out downlink data distribution, and the UE can simultaneously receive and transmit data from and send data from the uplink and the downlink of two radio links LAA MCG-link and LAA SCG-link. The LAA-SeNB base station performs self-carrier scheduling on LAA cells and supports the capability of the mode 2 of the present invention, and the UE also supports the mode 2 of the present invention, because there are other WLAN nodes on the unlicensed carrier frequency point where the LAA cells are located, they all need to contend for the local unlicensed carrier resource through LBT. The method comprises the following specific implementation steps:

step 1401: the LAA-MeNB configures the UE for LAA-DC dual Connection operation through RRC message RRC Connection Reconfiguration, and performs shunt transmission of downlink data blocks on the LAA-SCG side. Since the total delay of X2 is already greater than 4ms, and there is no applicable condition of the invention mode 1, the LAA-MeNB configures the LAA-SeNB and the UE transmits its associated auxiliary UCI information directly through LAA Scell1/2/3 uplink. Since the region regulation supports the SCS mechanism and both LAA-SeNB and UE support the new subframe length of 0.1ms, LAA-MeNB configures PUCCH channel of UE on LAA Scell1/2/3, and UCI information is uploaded and transmitted through the subframes with compressed length.

Step 1402: the LAA-SeNB successfully competes to a certain Transmission Burst resource through LBT operation, and the LAA-SeNB schedules and transmits 1 data block in each downlink subframe N on the LAA Scell 2/3. After successfully receiving and analyzing the two data blocks according to the traditional N +4 subframe interval time sequence, the UE successfully generates UCI before the position of the N +4 uplink subframe, and simultaneously performs CSI measurement, and finally successfully generates corresponding UCI information.

Step 1403: according to the configuration of the LAA-MeNB, the UE allows the position of a compressed subframe of a PUCCH (physical uplink control channel) N +4 on the LAA Scell2/3, and directly transmits UCI (uplink control information) to the LAA-SeNB in an uplink manner without carrying out LBT (local binary transmission) operation.

Step 1404: the LAA-SeNB analyzes the received UCI information and confirms that the UCI information corresponds to the downlink data transmission of the LAA Scell2/3, so that the transmission result and the CSI condition in the past observation time are known.

Step 1405: with continuous downlink transmission of data blocks by the LAA-SeNB on the LAA Scell1+ LAA Scell2+ LAA Scell3, the above process is repeated continuously, and the UE does not need to perform uplink LBT operation (reduce contention for unlicensed carrier resources) on the LAA Scell1+ LAA Scell2+ LAA Scell3, but directly compresses subframes through the PUCCH channel on the LAA Scell1/2/3 to timely guarantee feedback UCI.

Example 4: fig. 15 is a third schematic diagram of LAA-DC deployment of three LAA Scells on Pcell + unlicensed carrier in accordance with a preferred embodiment of the present invention, and fig. 16 is a schematic diagram of downlink scheduling transmission and uplink feedback of the LAA system in accordance with preferred embodiment 3 of the present invention, as shown in fig. 15 and fig. 16, an operator deploys and utilizes LAA-DC technology in an area that does not support SCS mechanism, there is Pcell serving cell macro coverage on the licensed carrier of LAA-MeNB, and a pre-estimated LAA-SeNB base station (total delay is 100ms) is connected through X2 at the far end, and the LAA-SeNB has deployment of three LAA Scells on the unlicensed carrier for hot spot capacity enhancement. The UE is under the public coverage of Pcell + LAA Scell1+ LAA Scell2+ LAA Scell3 at a certain time, so that the main base station LAA-MeNB decides that LAA-DC operation is configured for the UE to carry out downlink data distribution, and the UE can simultaneously receive and transmit data from and send data from the uplink and the downlink of two radio links LAA MCG-link and LAA SCG-link. The LAA-SeNB base station performs self-carrier scheduling on LAA cells and supports the capability of the mode 2 of the present invention, and the UE also supports the mode 2 of the present invention, because there are other WLAN nodes on the unlicensed carrier frequency point where the LAA cells are located, they all need to contend for the local unlicensed carrier resource through LBT. The method comprises the following specific implementation steps:

step 1601: the LAA-MeNB configures the UE for LAA-DC dual Connection operation through RRC message RRC Connection Reconfiguration, and performs shunt transmission of downlink data blocks on the LAA-SCG side. Since the total delay of X2 is already greater than 4ms, and there is no applicable condition of the invention mode 1, the LAA-MeNB configures the LAA-SeNB and the UE transmits its associated auxiliary UCI information directly through LAA Scell1/2/3 uplink. Because the system does not support the SCS mechanism and the shorter UCI subframe feedback mechanism under the mode 2, the LAA-MeNB configures the extremely high CCA detection threshold CCA-ED TL value of the UE on the LAA Scell1/2/3, and the LBT threshold value is only suitable for the uplink transmission of the UCI auxiliary information on the unlicensed carrier.

Step 1602: the LAA-SeNB successfully competes to a certain Transmission Burst resource through LBT operation, and the LAA-SeNB schedules and sends 1 data block in a downlink subframe N on the LAA Scell1/2 at the same time. After successfully receiving and analyzing the two data blocks according to the traditional N +4 subframe interval time sequence, the UE successfully generates UCI before the position of the N +4 uplink subframe, and simultaneously performs CSI measurement, and finally successfully generates corresponding UCI information.

Step 1603: according to the configuration of the LAA-MeNB, the UE allows the conventional subframe position of the PUCCH channel N +4 on the LAA Scell1/2 to perform the fast LBT operation. Because the local detection energy of the UE is less than the extremely high CCA detection threshold CCA-ED TL value, the UCI information can be directly sent to the LAA-SeNB in an uplink mode.

Step 1604: the LAA-SeNB analyzes the received UCI information and confirms that the UCI information corresponds to the downlink data transmission of the LAA Scell1/2, so that the transmission result and the CSI condition in the past observation time are known.

Step 1605: with continuous downlink transmission of data blocks by the LAA-SeNB on the LAA Scell1+ LAA Scell2+ LAA Scell3, the above process is repeated continuously, and the UE only needs to perform uplink fast LBT operation on the LAA Scell1+ LAA Scell2+ LAA Scell3, and feedback UCI is guaranteed in time through the PUCCH channel conventional subframe on the LAA Scell 1/2/3.

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.

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:

s1, the terminal receives the configuration information sent by the network side, where the configuration information includes: sending time and position information of one or more uplink candidate subframes of uplink auxiliary control information UCI of an unlicensed carrier of an licensed assisted access auxiliary area group LAA-SCG;

s2, the terminal receives the downlink data block on the unlicensed carrier;

s3, sending UCI corresponding to the downlink data block to the network side in uplink on the plurality of uplink candidate subframes.

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

Optionally, in this embodiment, the processor executes the method steps of the above 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 transmitting uplink feedback information is characterized by comprising the following steps:

the terminal receives configuration information sent by an authorized auxiliary access master cluster LAA-MCG side of a network side, wherein the configuration information comprises: sending time position information of one or more uplink candidate subframes, wherein the one or more uplink candidate subframes are used for sending uplink control information UCI of an unlicensed carrier on the side of an licensed assisted access assisting group LAA-SCG;

the terminal receives a downlink data block on the unlicensed carrier from the LAA-SCG side of the network side, and transmits UCI corresponding to the downlink data block to the network side in an uplink manner on the one or more uplink candidate subframes of the LAA-SCG side;

wherein, on the one or more uplink candidate subframes on the LAA-MCG side, transmitting UCI corresponding to the downlink data block to the network side in an uplink manner includes:

2. The method of claim 1, wherein the receiving the downlink data block on the unlicensed carrier from the LAA-SCG side comprises:

3. The method of claim 1, wherein the uplink transmitting UCI corresponding to the downlink data block to the network side on the one or more uplink candidate subframes on the LAA-MCG side comprises:

simultaneously uplink transmitting joint feedback UCI related to a plurality of downlink data blocks on one uplink candidate subframe of the one or more uplink candidate subframes, wherein the plurality of downlink data blocks comprise: before receiving downlink data blocks on the unlicensed carrier on the LAA-SCG side, the received downlink data blocks of the unlicensed carrier on the LAA-SCG side and the received downlink data blocks of other unlicensed carriers, where the joint feedback UCI includes: joint feedback information indicating whether the plurality of downlink data blocks are successfully received and Channel State Information (CSI) indicating channel reception observation time corresponding to the plurality of downlink data blocks.

4. The method of claim 3,

and under the condition that the feedback information of the combined feedback UCI exceeds the capacity of an uplink subframe where the combined feedback UCI is located, the combined feedback UCI preferably carries feedback of UCI corresponding to a downlink data block of an unauthorized carrier at the LAA-SCG side, wherein the coding mode of the combined feedback UCI containing a plurality of UCI information adopts a carrier aggregation combined UCI coding mode.

5. The method of claim 1, wherein the transmission time location information of the one or more uplink candidate subframes comprises: interval information of the plurality of uplink candidate subframes, the interval information including: the number of the spaced uplink subframes, and the spacing information indicates a time dimension spacing between uplink transmission time of the subframe where the UCI is located and reception time of the subframe where the downlink data block is located.

6. The method of claim 5, wherein the time dimension interval is determined by a delay time size of X2 between the LAA-SCG side and the LAA-MCG side, wherein a sum of the X2 delay time and the time dimension interval is less than or equal to a system-predetermined UCI feedback delay time length.

7. The method of claim 1, wherein after a delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds a predetermined UCI feedback delay threshold, the terminal is in a region where a short control frame SCS mechanism is not supported, and the configuration information further carries an energy detection threshold CCA-EDTL for a predetermined clear channel assessment CCA, wherein the CCA-EDTL is higher than a preset general CCA detection threshold;

8. The method according to any of claims 1 to 7, wherein the configuration information is carried in a dedicated radio resource control information, RRC, message or a system broadcast RRC message.

9. A method for transmitting uplink feedback information is characterized by comprising the following steps:

sending a downlink data block on an unlicensed carrier to the terminal on an unlicensed carrier secondary serving cell on an LAA-SCG side of the network side, wherein on one or more uplink candidate subframes on the LAA-MCG side of the network side, the main base station LAA-MeNB on the network side receives UCI corresponding to the downlink data block;

after receiving the UCI sent by the terminal in the uplink, the LAA-MCG side further transfers the UCI corresponding to the unlicensed carrier of the LAA-SCG side to the LAA-SCG side through an X2 interface.

10. The method of claim 9, wherein the transmission time location information of the one or more uplink candidate subframes comprises: interval information of the plurality of uplink candidate subframes, the interval information including: the number of the subframes at intervals, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

11. The method of claim 10, wherein the LAA-MCG side of the network derives UCI corresponding to the unlicensed carrier on the LAA-SCG side according to the interval information and physical layer control information.

12. The method of claim 9,

and after the LAA-SCG side does not receive UCI corresponding to the unlicensed carrier wave of the LAA-SCG side, which is sent by the LAA-MCG side through an X2 interface, at the UCI feedback delay time, sending an out-of-step message to the LAA-MCG side, wherein the out-of-step message is used for indicating the LAA-MCG side to update and adjust the time sequence for sending the UCI.

13. The method of claim 9, wherein the configuration information further carries an energy detection threshold CCA-EDTL for a predetermined clear channel assessment CCA, wherein the CCA-EDTL is above a preset general CCA detection threshold value.

14. The method according to any of claims 9 to 13, wherein the configuration information is carried in a dedicated radio resource control information, RRC, message or a system broadcast RRC message.

15. An apparatus for transmitting uplink feedback information, located in a terminal, includes:

a first sending module, configured to send, to the network side, UCI corresponding to the downlink data block in an uplink manner on the one or more uplink candidate subframes on the LAA-MCG side;

the first sending module is configured to send UCI corresponding to the downlink data block to the LAA-MCG side, where the LAA-MCG side further transfers the UCI corresponding to the unlicensed carrier of the LAA-SCG side to the LAA-SCG side through an X2 interface.

16. The apparatus of claim 15,

the second receiving module is further configured to preferentially receive a downlink data block on an unlicensed carrier on the LAA-SCG side, where after receiving the downlink data block, the second receiving module sends UCI feedback corresponding to the downlink data block.

17. The apparatus of claim 15,

the first sending module is further configured to send, in an uplink candidate subframe of the one or more uplink candidate subframes, a joint feedback UCI related to a plurality of downlink data blocks in an uplink at the same time, where the plurality of downlink data blocks include: before receiving downlink data blocks on the unlicensed carrier on the LAA-SCG side, the received downlink data blocks of the unlicensed carrier on the LAA-SCG side and the received downlink data blocks of other unlicensed carriers, where the joint feedback UCI includes: joint feedback information indicating whether the plurality of downlink data blocks are successfully received and Channel State Information (CSI) indicating channel reception observation time corresponding to the plurality of downlink data blocks.

18. The apparatus of claim 17,

19. The apparatus of claim 15, wherein the transmission time location information of the one or more uplink candidate subframes comprises: interval information of the one or more uplink candidate subframes, the interval information including: the number of the subframes at intervals, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

20. The apparatus of claim 19, wherein the time dimension interval is determined by a delay time size of X2 between the LAA-SCG side and the LAA-MCG side, wherein a sum of the X2 delay time and the time dimension interval is less than or equal to a system-predetermined UCI feedback delay time length.

21. The apparatus of claim 15, wherein after a delay time of X2 between the LAA-SCG side and the LAA-MCG side exceeds a predetermined UCI feedback delay threshold, the terminal is in a region where short control frame SCS mechanism is not supported, and the configuration information further carries an energy detection threshold CCA-EDTL for a predetermined clear channel assessment CCA, wherein the CCA-EDTL is higher than a predetermined general CCA detection threshold;

22. The apparatus according to any of claims 15 to 21, wherein the configuration information is carried in a dedicated radio resource control information, RRC, message or a system broadcast RRC message.

23. An apparatus for transmitting uplink feedback information, located on a network side, includes:

a third receiving module, configured to receive, at one or more uplink candidate subframes on the LAA-MCG side of the network side, UCI corresponding to the downlink data block at the network side master base station LAA-MeNB;

24. The apparatus of claim 23, wherein the transmission time location information of the one or more uplink candidate subframes comprises: interval information of the one or more uplink candidate subframes, the interval information including: the number of the subframes at intervals, and the interval information indicates the time dimension interval between the uplink sending time of the subframe where the UCI is located and the receiving time of the subframe where the downlink data block is located.

25. The apparatus of claim 24, wherein the LAA-MCG side of the network derives UCI corresponding to the unlicensed carrier on the LAA-SCG side according to the interval information and physical layer control information.

26. The apparatus of claim 23,

27. The apparatus of claim 23, wherein the configuration information further carries an energy detection threshold CCA-EDTL for a predetermined clear channel assessment CCA, wherein the CCA-EDTL is above a preset general CCA detection threshold value.

28. The apparatus according to any of claims 23 to 27, wherein the configuration information is carried in a dedicated radio resource control information, RRC, message or a system broadcast RRC message.