CN111417192B

CN111417192B - Transmission method, device, base station and terminal for aperiodic Channel State Information (CSI)

Info

Publication number: CN111417192B
Application number: CN201910009138.0A
Authority: CN
Inventors: 司倩倩; 高雪娟; 艾托尼
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-01-04
Filing date: 2019-01-04
Publication date: 2023-03-17
Anticipated expiration: 2039-01-04
Also published as: CN111417192A; WO2020140964A1

Abstract

The invention provides a transmission method, a device, a base station and a terminal of aperiodic Channel State Information (CSI), wherein the transmission method comprises the following steps: issuing at least two downlink control information DCI to a terminal; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource. According to the scheme, the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI can be reduced or avoided, and therefore the reliable feedback of the aperiodic CSI on the PUCCH is guaranteed.

Description

Transmission method, device, base station and terminal for aperiodic Channel State Information (CSI)

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a base station, and a terminal for transmitting aperiodic channel state information CSI.

Background

In a 5G system, rel-16 (release 16) may support that downlink DCI (downlink control information) triggers aperiodic CSI (channel state information) to be transmitted through a PUCCH (physical uplink control channel), and there is no specific transmission scheme at present, which cannot guarantee reliable feedback of the aperiodic CSI on the PUCCH.

Disclosure of Invention

The invention aims to provide a transmission method, a transmission device, a base station and a terminal of aperiodic Channel State Information (CSI), and solve the problem that reliable feedback of the aperiodic CSI on a Physical Uplink Control Channel (PUCCH) cannot be guaranteed in the prior art.

In order to solve the above technical problem, an embodiment of the present invention provides a method for transmitting aperiodic channel state information CSI, which is applied to a base station, and includes:

issuing at least two downlink control information DCI to a terminal;

the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of the at least two DCI scheduling uses the same PUCCH resource to perform feedback;

if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource.

Optionally, the PUCCH resource indicated by the DCI instructing the terminal to report the aperiodic CSI is different from the PUCCH resource indicated by the DCI issued before the DCI instructing the terminal to report the aperiodic CSI.

Optionally, after issuing at least two pieces of downlink control information DCI to the terminal, the method further includes:

determining PUCCH resources according to the last DCI issued;

and detecting the aperiodic CSI and HARQ-ACK fed back by the terminal on the PUCCH resource.

Optionally, the method further includes:

if the aperiodic CSI and HARQ-ACK fed back by the terminal are not detected on the PUCCH resources, and a PUCCH resource different from the PUCCH resource indicated by the last DCI sent down is indicated in the DCI sent down before the last DCI sent down, detecting on the different PUCCH resources indicated by the DCI in a DCI reverse order mode until effective feedback information is detected;

when PUCCH resources in a non-discontinuous transmission DTX state are detected, the detection of effective feedback information is confirmed.

The embodiment of the invention also provides a transmission method of the aperiodic channel state information CSI, which is applied to a terminal and comprises the following steps:

receiving at least two downlink control information DCI issued by a base station;

determining whether to carry out aperiodic CSI reporting or not according to the received DCI;

the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback;

if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI received after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource.

Optionally, a PUCCH resource indicated by DCI instructing the terminal to report the aperiodic CSI is different from a PUCCH resource indicated by DCI received before DCI instructing the terminal to report the aperiodic CSI.

Optionally, if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, after receiving the at least two DCI sent by the base station, the method further includes:

determining a reference time slot of the aperiodic CSI in the following way:

when the received last DCI and a PUCCH resource used by the aperiodic CSI feedback are in the same time slot, the reference time slot of the aperiodic CSI is the sending time slot of the last DCI; otherwise, the reference time slot of the aperiodic CSI is an effective downlink time slot which meets the CSI processing time delay and is closest to the CSI reporting time slot; or,

the reference time slot of the aperiodic CSI is an effective downlink time slot which meets the CSI processing time delay and is closest to the CSI reporting time slot; or,

the reference time slot of the aperiodic CSI is the time slot of the last DCI received;

the valid downlink timeslot refers to a downlink timeslot which at least includes a downlink symbol or a flexible symbol configured by a higher layer signaling and is not included in a measurement interval of the terminal.

Optionally, after determining the reference slot of the aperiodic CSI, the method further includes:

according to the determined reference time slot of the aperiodic CSI, CSI measurement is carried out to obtain the aperiodic CSI;

and reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station.

Optionally, the reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station includes:

determining PUCCH resources according to the received last DCI;

and transmitting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resource.

The embodiment of the invention also provides a base station, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

issuing at least two downlink control information DCI to a terminal through the transceiver;

if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI which indicates that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource.

Optionally, a PUCCH resource indicated by DCI instructing the terminal to report the aperiodic CSI is different from a PUCCH resource indicated by DCI issued before DCI instructing the terminal to report the aperiodic CSI.

Optionally, the processor is further configured to:

after at least two downlink control information DCI are issued to a terminal, determining PUCCH resources according to the last DCI issued;

Optionally, the processor is further configured to:

The embodiment of the invention also provides a terminal, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

receiving at least two downlink control information DCI issued by a base station through the transceiver;

determining whether to carry out aperiodic CSI reporting according to the received DCI;

Optionally, if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the processor is further configured to:

after receiving at least two downlink control information DCI issued by a base station, determining a reference time slot of the aperiodic CSI by adopting the following mode:

Optionally, the processor is further configured to:

after the reference time slot of the aperiodic CSI is determined, CSI measurement is carried out according to the determined reference time slot of the aperiodic CSI to obtain the aperiodic CSI;

and reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station through the transceiver.

Optionally, the processor is specifically configured to:

determining PUCCH resources according to the received last DCI;

and transmitting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resource through the transceiver.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for transmitting aperiodic channel state information CSI at the base station side; or

The program is executed by a processor to implement the steps of the method for transmitting aperiodic CSI at the terminal side.

The embodiment of the invention also provides a transmission device of the aperiodic channel state information CSI, which is applied to a base station and comprises the following steps:

the first sending module is used for issuing at least two downlink control information DCI to the terminal;

Optionally, the method further includes:

the first determining module is used for determining PUCCH resources according to the last downlink control information DCI after the DCI is transmitted to the terminal;

and the first detection module is used for detecting the aperiodic CSI and HARQ-ACK fed back by the terminal on the PUCCH resource.

Optionally, the method further includes:

a first processing module, configured to, if the aperiodic CSI and HARQ-ACK fed back by the terminal are not detected on the PUCCH resource, and a PUCCH resource different from a PUCCH resource indicated by the last DCI issued before the last DCI issued is indicated, perform detection on the different PUCCH resources indicated by the DCI in a reverse order manner until effective feedback information is detected;

The embodiment of the invention also provides a transmission device of the aperiodic channel state information CSI, which is applied to a terminal and comprises the following steps:

a first receiving module, configured to receive at least two downlink control information DCIs sent by a base station;

a second determining module, configured to determine whether to perform aperiodic CSI reporting according to the received DCI;

Optionally, if one DCI of the at least two DCIs indicates the terminal to report the aperiodic CSI, the method further includes:

a third determining module, configured to determine, after receiving at least two pieces of downlink control information DCI sent by the base station, a reference timeslot of the aperiodic CSI in the following manner:

Optionally, the method further includes:

the second processing module is used for measuring the CSI according to the determined reference time slot of the aperiodic CSI after the reference time slot of the aperiodic CSI is determined, so as to obtain the aperiodic CSI;

and the second sending module is used for reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station.

Optionally, the second sending module includes:

a first determining submodule, configured to determine a PUCCH resource according to the received last DCI;

and the first sending submodule is used for sending the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resource.

The technical scheme of the invention has the following beneficial effects:

in the above scheme, the transmission method of the aperiodic channel state information CSI issues at least two pieces of downlink control information DCI to the terminal; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of the at least two DCI scheduling uses the same PUCCH resource to perform feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating the terminal to report the aperiodic CSI also indicates the terminal to report the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

Drawings

Fig. 1 is a first flowchart illustrating a method for transmitting aperiodic CSI according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a transmission method of aperiodic CSI according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a specific application flow of a transmission method of aperiodic CSI according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 6 is a first schematic structural diagram of an apparatus for transmitting aperiodic CSI according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second transmission apparatus for aperiodic CSI according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Aiming at the problem that reliable feedback of aperiodic CSI on a PUCCH (physical uplink control channel) cannot be ensured in the prior art, the invention provides a transmission method of aperiodic CSI, which is applied to a base station and comprises the following steps as shown in figure 1:

step 11: issuing at least two pieces of downlink control information DCI to a terminal;

The transmission method of the aperiodic Channel State Information (CSI) provided by the embodiment of the invention issues at least two Downlink Control Information (DCI) to a terminal; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating the terminal to report the aperiodic CSI also indicates the terminal to report the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

The PUCCH resource indicated by the DCI for indicating the terminal to report the aperiodic CSI is different from the PUCCH resource indicated by the DCI issued before the DCI for indicating the terminal to report the aperiodic CSI.

Further, after issuing at least two pieces of downlink control information DCI to the terminal, the method further includes: determining PUCCH resources according to the last DCI issued; and detecting the aperiodic CSI and HARQ-ACK fed back by the terminal on the PUCCH resource.

Further, the method also comprises the following steps: if the aperiodic CSI and HARQ-ACK fed back by the terminal are not detected on the PUCCH resources, and a PUCCH resource different from the PUCCH resource indicated by the last DCI sent down is indicated in the DCI sent down before the last DCI sent down, detecting on the different PUCCH resources indicated by the DCI in a DCI reverse order mode until effective feedback information is detected; when PUCCH resources in a non-discontinuous transmission DTX state are detected, the detection of effective feedback information is confirmed.

An embodiment of the present invention further provides a method for transmitting aperiodic channel state information CSI, which is applied to a terminal, and as shown in fig. 2, the method includes:

step 21: receiving at least two downlink control information DCI issued by a base station;

step 22: determining whether to carry out aperiodic CSI reporting or not according to the received DCI;

The transmission method of the aperiodic Channel State Information (CSI) provided by the embodiment of the invention receives at least two Downlink Control Information (DCI) issued by a base station; determining whether to carry out aperiodic CSI reporting according to the received DCI; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI received after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

The PUCCH resource indicated by the DCI for indicating the terminal to report the aperiodic CSI is different from the PUCCH resource indicated by the DCI received before the DCI for indicating the terminal to report the aperiodic CSI.

Further, if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, after receiving the at least two DCI transmitted by the base station, the method further includes: determining a reference slot for aperiodic CSI in the following manner:

the valid downlink timeslot refers to a downlink timeslot that at least includes a downlink symbol or a flexible symbol configured by a higher layer signaling and is not included in a measurement interval of the terminal.

Further, after determining the reference slot of the aperiodic CSI, the method further includes: according to the determined reference time slot of the aperiodic CSI, CSI measurement is carried out to obtain the aperiodic CSI; and reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station.

Specifically, the reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station includes: determining PUCCH resources according to the received last DCI; and transmitting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resource.

The following further describes the transmission method of the aperiodic CSI provided in the embodiment of the present invention with reference to the base station and the terminal.

In view of the above technical problems, an embodiment of the present invention provides a method for transmitting aperiodic channel state information CSI, where the related base station side mainly includes: the base station indicates, through a field in DCI (i.e., the downlink DCI) for scheduling PDSCH transmission, whether a UE (terminal) reports aperiodic CSI, and receives HARQ-ACK feedback and the aperiodic CSI corresponding to the DCI fed back by using the same PUCCH resource, and in a plurality of downlink DCI corresponding to one PUCCH resource, if the base station triggers aperiodic CSI reporting in one DCI, a CSI trigger information field of subsequent DCI (DCI corresponding to the same PUCCH resource and ordered (see ordering manner described below) after the DCI triggering aperiodic CSI reporting) also indicates the terminal to report aperiodic CSI in the PUCCH resource, and the base station may set the content of a CSI trigger information field in all subsequent DCI to be the same as the content of the CSI trigger information field of the DCI triggering aperiodic CSI reporting.

Specifically, for example, a field in the downlink DCI indicates the UE to report the aperiodic CSI:

regarding the terminal side:

the terminal receives downlink DCI sent by a base station, reports aperiodic CSI according to CSI trigger information in the DCI, and HARQ-ACK corresponding to the DCI and the aperiodic CSI triggered by the DCI use the same PUCCH resource for feedback. If a terminal receives (needs) multiple PDSCHs (physical downlink shared channels) which are fed back on the same PUCCH resource, when the terminal receives a first DCI corresponding to one of the PDSCHs and triggers aperiodic CSI feedback, the terminal does not expect that the content of a CSI trigger information field included in other DCIs after the first DCI indicates that aperiodic CSI is not reported, or the terminal does not expect that the content of a CSI trigger information field included in other DCIs after the first DCI is different from the content of a CSI trigger information field in the first DCI, where the other DCI is DCI corresponding to other PDSCHs which are fed back on the same PUCCH resource (HARQ-ACK) by using HARQ-ACK of the PDSCH scheduled by the first DCI.

Further, the method also comprises the following steps: when the first DCI is preceded by another DCI, the PUCCH resource indicated by the first DCI and the PUCCH resource indicated by the another DCI are different.

In the embodiment of the present invention, the reference time slot of the aperiodic CSI may be determined according to the following manner (specifically, the CSI needs to be measured and reported, and the measurement resource corresponds to the reference time slot):

when the last DCI and the PUCCH resource of the aperiodic CSI are in the same time slot, the reference time slot of the aperiodic CSI is the time slot sent by the last DCI, otherwise, the reference time slot of the aperiodic CSI is an effective downlink time slot which meets CSI processing time delay and is closest to a CSI reporting time slot;

or the reference time slot of the aperiodic CSI is an effective downlink time slot which meets the CSI processing time delay and is closest to the CSI reporting time slot;

or, the reference time slot of the aperiodic CSI is the time slot where the last DCI is located;

the valid downlink timeslot refers to a downlink timeslot that at least includes a downlink symbol or a flexible symbol configured by a higher layer signaling and is not included in a measurement interval of the UE.

Further, the terminal performs CSI measurement according to the determined reference time slot of the aperiodic CSI to obtain the aperiodic CSI;

and then the terminal determines PUCCH resources according to the indication of the last DCI, and sends the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resources.

Here, it is explained that: in the above, the DCI fed back in the same PUCCH resource is first sorted according to the ascending order of carrier numbers (there may be multiple DCIs on one carrier), and then sorted according to the starting time or ending time of the detection opportunity (i.e. the starting time or ending time of the DCI in the transmission resource range). The last DCI is the last DCI which is received and fed back in the same PUCCH resource. And when the order of the DCI is judged, the DCI is sequenced according to the mode. The same applies below.

Regarding the base station side:

and the base station indicates the UE to report the aperiodic CSI through a CSI trigger information field in the downlink DCI, and indicates that the HARQ-ACK corresponding to the DCI and the aperiodic CSI triggered by the DCI use the same PUCCH resource for feedback. If the base station schedules (needs) a plurality of PDSCHs which are fed back on the same PUCCH resource, when the base station triggers aperiodic CSI feedback in a first DCI corresponding to one PDSCH, CSI trigger information fields of other DCIs after the first DCI also indicate the terminal to report aperiodic CSI on the PUCCH resource, or the content of CSI trigger information fields contained in the other DCIs after the first DCI is the same as the content of CSI trigger information fields in the first DCI, and the other DCIs are DCIs corresponding to other PDSCHs which are fed back (HARQ-ACK) on the same PUCCH resource by HARQ-ACK of the PDSCH scheduled by the first DCI.

In the embodiment of the invention, the base station determines the PUCCH resources according to the indication of the last DCI, and detects the aperiodic CSI and HARQ-ACK fed back by the terminal on the PUCCH resources.

Further, if the base station does not detect the aperiodic CSI and HARQ-ACK fed back by the terminal in the PUCCH resources, and the base station indicates a different PUCCH resource in the DCI before the last DCI, the base station performs detection on the corresponding different PUCCH resource in reverse order according to the DCI until effective feedback information is detected (it is determined that there is data transmission in the non-discontinuous transmission DTX state, and it is determined that the effective feedback information is detected).

Here, it is explained that: in the above, the DCI fed back in the same PUCCH resource is first sorted according to the ascending order of the carrier numbers, and then sorted according to the time sequence of the start time or the end time of the detection opportunity. The last DCI is the last DCI which is sent and fed back in the same PUCCH resource. And when the order of the DCI is judged, the DCI is sequenced according to the mode. As above.

The following specifically exemplifies the scheme provided by the embodiment of the present invention:

assuming that the base station uses the scheduling of the present time slot (that the PDCCH and the PDSCH are in the same time slot), as shown in fig. 3, the base station schedules the PDSCH transmission in slot n, and indicates to transmit HARQ-ACK feedback information of the PDSCH in slot n +4 through DCI. In slot n +1, the base station schedules PDSCH transmission and triggers UE to transmit aperiodic CSI, and HARQ-ACK feedback and aperiodic CSI information of the PDSCH are transmitted in slot n +4 through DCI indication. If the base station still needs to schedule the PDSCH in slot n +2 and/or slot n +3 (the PDSCH scheduled by slot n, slot n +1, slot n +2 and slot n +3 are different), and still indicates that the HARQ-ACK information corresponding to the PDSCH and the HARQ-ACK information corresponding to the PDSCH scheduled by slot n and slot n +1 perform multiplexing feedback in slot n +4, the base station needs to set the aperiodic CSI trigger information field in the scheduling DCI of slot n +2 and/or slot n +3 and also indicates the UE to report the aperiodic CSI, or sets the content of the aperiodic CSI trigger information field in the scheduling DCI of slot n +2 and/or slot n +3 to be the same as the content of the aperiodic CSI trigger information field in the scheduling DCI of slot n + 1.

Meanwhile, in order to avoid that the UE misses all DCI indicating aperiodic CSI reporting, the base station may indicate, in the DCI corresponding to slot n, PUCCH resources indicated in the DCI different from slot n +1, slot n +2, and slot n +3 respectively (specifically, PUCCH resources indicated by the DCI corresponding to slot n +1, slot n +2, and slot n +3 may be the same or different, but are all different from PUCCH resources indicated by the DCI corresponding to slot n), for example, the base station indicates, in the DCI corresponding to slot n, that the UE uses PUCCH resource 1 (corresponding to symbol 1 in fig. 3), and indicates, in the DCI corresponding to slot n +1, slot n +2, and slot n +3 respectively, that the UE uses PUCCH resource 2 (corresponding to symbol 2 in fig. 3), so that if the UE misses DCI corresponding to slot n +1, slot n +2, and slot n +3, the UE only feeds back HARQ-ACK information on PUCCH resource 1 of slot n + 4; if the UE receives all DCI, the UE feeds back HARQ-ACK and CSI information of slot n, slot n +1, slot n +2 and slot n +3 on PUCCH resource 2 of slot n +4, and the base station can determine whether the UE has the missed detection condition of the DCI or not through blind detection of different PUCCH resources.

When determining the reference time slot of the aperiodic CSI transmitted in slot n +4, the UE uses the last slot n +3 triggering the aperiodic CSI report as the reference time slot of the aperiodic CSI (in this case, it needs to be determined that all the time slots all satisfy the CSI processing delay); or the UE selects an effective downlink timeslot that satisfies CSI processing latency and is closest to a CSI reporting timeslot as a reference timeslot of the aperiodic CSI, assuming that the CSI processing latency is 30 symbols, one timeslot includes 14 symbols, and PUCCH resource 2 occupies the last 3 symbols in slot n +4, so that the UE uses slot n +2 as the reference timeslot of the aperiodic CSI.

As can be seen from the above, currently, in NR (new air interface, 5G), there is no specific scheme for how to transmit aperiodic CSI through a PUCCH format, but the scheme provided in the embodiment of the present invention indicates, through a field in downlink-related DCI, whether UE reports aperiodic CSI, and indicates that HARQ-ACK feedback corresponding to DCI and the aperiodic CSI use the same PUCCH resource for feedback when reporting, and, in a plurality of downlink DCIs corresponding to one PUCCH resource, if a base station triggers aperiodic CSI reporting in one DCI, CSI trigger information fields in all subsequent DCIs also indicate the terminal to report aperiodic CSI, or the contents of CSI trigger information fields in all subsequent DCIs are the same as the contents of CSI trigger information fields of DCI triggering aperiodic CSI reporting; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, and ensure that the aperiodic CSI can be reliably fed back on the PUCCH.

The base station provided by the embodiment of the invention issues at least two pieces of downlink control information DCI to a terminal through the transceiver; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of the at least two DCI scheduling uses the same PUCCH resource to perform feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating the terminal to report the aperiodic CSI also indicates the terminal to report the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

Specifically, as shown in fig. 4, the base station according to the embodiment of the present invention includes:

a processor 41; and a memory 43 connected to the processor 41 through the bus interface 42, wherein the memory 43 is used for storing programs and data used by the processor 41 in executing operations, and when the processor 41 calls and executes the programs and data stored in the memory 43, the following processes are executed:

issuing at least two downlink control information DCI to the terminal through the transceiver 44;

Wherein a transceiver 44 is connected to the bus interface 42 for receiving and transmitting data under control of the processor 41.

It should be noted that in fig. 4, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 41 and various circuits of memory represented by memory 43 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 44 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 41 is responsible for managing the bus architecture and general processing, and the memory 43 may store data used by the processor 41 in performing operations.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Further, the processor is further configured to: after at least two downlink control information DCI are issued to a terminal, determining PUCCH resources according to the last DCI issued; and detecting the aperiodic CSI and HARQ-ACK fed back by the terminal on the PUCCH resource.

Still further, the processor is further configured to: if the aperiodic CSI and HARQ-ACK fed back by the terminal are not detected on the PUCCH resources, and a PUCCH resource different from the PUCCH resource indicated by the last DCI sent down is indicated in the DCI sent down before the last DCI sent down, detecting on the different PUCCH resources indicated by the DCI in a DCI reverse order mode until effective feedback information is detected; when PUCCH resources in a non-discontinuous transmission DTX state are detected, the detection of effective feedback information is confirmed.

The implementation embodiments of the transmission method for aperiodic CSI at the base station side are all applicable to the embodiment of the base station, and the same technical effects can be achieved.

The terminal provided by the embodiment of the invention receives at least two downlink control information DCI issued by a base station through the transceiver; determining whether to carry out aperiodic CSI reporting according to the received DCI; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI received after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

Specifically, as shown in fig. 5, the terminal provided in the embodiment of the present invention includes:

a processor 51; and a memory 53 connected to the processor 51 through a bus interface 52, wherein the memory 53 is used for storing programs and data used by the processor 51 in executing operations, and when the processor 51 calls and executes the programs and data stored in the memory 53, the following processes are executed:

receiving at least two downlink control information DCI transmitted by a base station through the transceiver 54;

Wherein a transceiver 54 is connected to the bus interface 52 for receiving and transmitting data under the control of the processor 51.

It should be noted that in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 51 and various circuits of memory represented by memory 53 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 54 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 55 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 51 is responsible for managing the bus architecture and general processing, and the memory 53 may store data used by the processor 51 in performing operations.

Further, if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the processor is further configured to: after receiving at least two downlink control information DCI issued by a base station, determining a reference time slot of the aperiodic CSI by adopting the following mode:

Still further, the processor is further configured to: after the reference time slot of the aperiodic CSI is determined, CSI measurement is carried out according to the determined reference time slot of the aperiodic CSI to obtain the aperiodic CSI; and reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station through the transceiver.

Specifically, the processor is specifically configured to: determining PUCCH resources according to the received last DCI; and transmitting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resource through the transceiver.

The implementation embodiments of the transmission method of the aperiodic CSI at the terminal side are all applicable to the embodiment of the terminal, and the same technical effect can be achieved.

The implementation embodiments of the steps of the transmission method of aperiodic CSI at the base station side or the terminal side are all applicable to the embodiment of the computer-readable storage medium, and the same technical effects can be achieved.

An embodiment of the present invention further provides a device for transmitting aperiodic channel state information CSI, which is applied to a base station, and as shown in fig. 6, includes:

a first sending module 61, configured to issue at least two pieces of downlink control information DCI to a terminal;

The transmission device of the aperiodic channel state information CSI provided by the embodiment of the invention issues at least two pieces of downlink control information DCI to a terminal; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating the terminal to report the aperiodic CSI also indicates the terminal to report the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

Further, the apparatus for transmitting aperiodic CSI further includes: the first determining module is used for determining PUCCH resources according to the last downlink control information DCI after the DCI is issued to the terminal; a first detection module, configured to detect aperiodic CSI and HARQ-ACK fed back by the terminal on the PUCCH resource.

Further, the apparatus for transmitting aperiodic CSI further comprises: a first processing module, configured to, if the aperiodic CSI and HARQ-ACK fed back by the terminal are not detected on the PUCCH resource, and a PUCCH resource different from a PUCCH resource indicated by the last DCI issued before the last DCI issued is indicated, perform detection on the different PUCCH resources indicated by the DCI in a reverse order manner until effective feedback information is detected; when PUCCH resources in a non-discontinuous transmission DTX state are detected, the detection of effective feedback information is confirmed.

The implementation embodiments of the transmission method of aperiodic CSI at the base station side are all applicable to the embodiment of the transmission apparatus of aperiodic CSI, and can achieve the same technical effect.

An embodiment of the present invention further provides a device for transmitting aperiodic channel state information CSI, which is applied to a terminal, and as shown in fig. 7, includes:

a first receiving module 71, configured to receive at least two pieces of downlink control information DCI sent by a base station;

a second determining module 72, configured to determine whether to perform aperiodic CSI reporting according to the received DCI;

The transmission device of the aperiodic channel state information CSI provided by the embodiment of the invention receives at least two downlink control information DCI issued by a base station; determining whether to carry out aperiodic CSI reporting according to the received DCI; the hybrid automatic repeat request acknowledgement HARQ-ACK of the PDSCH of at least two DCI scheduling uses the same physical uplink control channel PUCCH resource for feedback; if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI received after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource; the method and the device can reduce or avoid the influence on the feedback information content when the UE fails to detect a DCI triggering the reporting of the aperiodic CSI, thereby ensuring that the aperiodic CSI can be reliably fed back on the PUCCH.

Further, if one DCI of the at least two DCIs indicates the terminal to report the aperiodic CSI, the apparatus for transmitting the aperiodic CSI further includes: a third determining module, configured to determine, after receiving at least two pieces of downlink control information DCI sent by the base station, a reference timeslot of the aperiodic CSI in the following manner:

Further, the apparatus for transmitting aperiodic CSI further comprises: the second processing module is used for measuring the CSI according to the determined reference time slot of the aperiodic CSI after the reference time slot of the aperiodic CSI is determined, so as to obtain the aperiodic CSI; and the second sending module is used for reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station.

Specifically, the second sending module includes: a first determining submodule, configured to determine a PUCCH resource according to the received last DCI; and the first sending submodule is used for sending the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI on the PUCCH resource.

The implementation embodiments of the transmission method of the aperiodic CSI at the terminal side are all applicable to the embodiment of the transmission device of the aperiodic CSI, and the same technical effects can be achieved.

It should be noted that many of the functional components described in this specification are referred to as modules/sub-modules in order to more particularly emphasize their implementation independence.

In embodiments of the invention, the modules/sub-modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.

Claims

1. A transmission method of aperiodic Channel State Information (CSI) is applied to a base station, and is characterized by comprising the following steps:

issuing at least two downlink control information DCI to a terminal;

if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI issued after the DCI indicating the terminal to report the aperiodic CSI also indicates the terminal to report the aperiodic CSI on the PUCCH resource;

2. The method for transmitting aperiodic CSI as claimed in claim 1, further comprising, after sending at least two DCI messages to the terminal:

determining PUCCH resources according to the last DCI issued;

3. The method for transmitting aperiodic Channel State Information (CSI) as defined in claim 2, further comprising:

4. A transmission method of aperiodic CSI (channel state information), which is applied to a terminal, is characterized by comprising the following steps:

if one DCI of the at least two DCIs indicates that the terminal reports the aperiodic CSI, the aperiodic CSI and the HARQ-ACK use the same PUCCH resource for feedback, and a CSI trigger information field of the DCI received after the DCI indicating that the terminal reports the aperiodic CSI also indicates that the terminal reports the aperiodic CSI on the PUCCH resource;

5. The method for transmitting aperiodic CSI as claimed in claim 4, wherein if one DCI of the at least two DCIs indicates that the terminal reports aperiodic CSI, after receiving at least two DCI sent by the base station, the method further comprises:

determining a reference slot for aperiodic CSI in the following manner:

6. The method for transmitting aperiodic CSI as recited in claim 5, further comprising, after determining the reference slot for aperiodic CSI:

7. The method of claim 6, wherein the reporting the obtained aperiodic CSI and the HARQ-ACK of the PDSCH scheduled by each DCI to the base station comprises:

determining PUCCH resources according to the received last DCI;

8. A base station comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

9. The base station of claim 8, wherein the processor is further configured to:

10. The base station of claim 9, wherein the processor is further configured to:

11. A terminal comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

12. The terminal of claim 11, wherein if one of the at least two DCIs indicates that the terminal reports aperiodic CSI, the processor is further configured to:

when the PUCCH resources used by the received last DCI and the aperiodic CSI feedback are in the same time slot, the reference time slot of the aperiodic CSI is the sending time slot of the last DCI; otherwise, the reference time slot of the aperiodic CSI is an effective downlink time slot which meets the CSI processing time delay and is closest to the CSI reporting time slot; or,

13. The terminal of claim 12, wherein the processor is further configured to:

14. The terminal of claim 13, wherein the processor is specifically configured to:

determining PUCCH resources according to the received last DCI;

15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for transmission of aperiodic channel state information, CSI, as defined in any one of claims 1 to 3; or

The program, when executed by a processor, implements the steps of the method for transmission of aperiodic channel state information, CSI, as recited in any of claims 4 to 7.

16. A transmission device of aperiodic CSI (channel state information), which is applied to a base station, is characterized by comprising:

17. A transmission device of aperiodic CSI (channel state information), which is applied to a terminal, is characterized by comprising: