CN111416684B

CN111416684B - Information transmission method, base station and terminal

Info

Publication number: CN111416684B
Application number: CN201910009135.7A
Authority: CN
Inventors: 司倩倩; 高雪娟
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: 2021-07-27
Anticipated expiration: 2039-01-04
Also published as: WO2020140967A1; CN111416684A

Abstract

The invention provides an information transmission method, a base station and a terminal, which solve the problem of how to realize aperiodic CSI transmission when a plurality of downlink DCIs simultaneously indicate that aperiodic CSI is reported in the same PUCCH resource. The method comprises the following steps: sending first downlink DCI for indicating a terminal to report aperiodic CSI, wherein HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicate that the aperiodic CSI reported by the terminal is transmitted in the same PUCCH resource; and receiving HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource. The invention can transmit the aperiodic CSI through the PUCCH format, reduce the downlink control overhead and reduce the transmission delay of the aperiodic CSI.

Description

Information transmission method, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information transmission method, a base station, and a terminal.

Background

In the NR Rel-15 system, aperiodic CSI (Channel State Information) is transmitted through a PUSCH (Physical Uplink Shared Channel). The base station notifies a UE (User Equipment) whether to perform aperiodic CSI reporting through a CSI request field in the DCI format 1_ 0.

The CSI request field of DCI format 1_0 may be 0,1,2,3,4,5, or 6 bits. And when all the CSI requests are 0, not triggering any CSI report. Otherwise, reporting the aperiodic CSI according to the high-level configuration information. The base station may trigger aperiodic CSI reporting and uplink data to be transmitted together, or may trigger aperiodic CSI reporting only. The base station may perform measurement using a periodic CSI-RS, a semi-persistent CSI-RS, or an aperiodic CSI-RS through higher layer signaling configuration.

DCI format 1_0 includes time domain resource allocation information and frequency domain resource allocation information, and aperiodic CSI and data (if any) are transmitted on the resources indicated by DCI format 1_ 0. And when the DCI and the aperiodic CSI are in the same time slot, the reference resource of the aperiodic CSI is the time slot sent by the DCI, otherwise, the reference resource of the aperiodic CSI is an effective downlink time slot which meets the CSI processing time delay and has the nearest distance to the CSI reporting time slot.

In the NR Rel-16 system, if it is supported that aperiodic CSI is transmitted in a downlink DCI triggered short PUCCH (Physical Uplink Control Channel) format, there may be a case where multiple downlink DCIs indicate that aperiodic CSI reporting is performed in the same PUCCH resource at the same time, and at this time, there is no specific CSI transmission scheme according to the definition of the current standard.

Disclosure of Invention

The invention aims to provide an information transmission method, a base station and a terminal, which are used for solving the problem of how to realize aperiodic CSI transmission when a plurality of downlink DCIs simultaneously indicate that aperiodic CSI reporting is carried out in the same PUCCH resource.

In order to achieve the above object, an information transmission method provided in an embodiment of the present invention is applied to a base station, and includes:

sending first Downlink Control Information (DCI) for indicating a terminal to report aperiodic Channel State Information (CSI), wherein the hybrid automatic repeat request acknowledgement (HARQ-ACK) corresponding to a Physical Downlink Shared Channel (PDSCH) scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicate that the terminal reports the CSI to be transmitted in the same Physical Uplink Control Channel (PUCCH) resource;

and receiving HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource.

Wherein the method further comprises:

and determining a target sending time slot of the CSI-RS, and sending the CSI-RS in the target sending time slot.

Wherein the determining the target transmission time slot of the CSI-RS comprises:

determining the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource according to the high-level signaling configuration or a predefined value;

and determining an effective downlink time slot which is closest to the aperiodic CSI reporting time slot in the effective downlink time slots with the interval greater than or equal to the minimum time slot interval as a target sending time slot of the CSI-RS.

The effective downlink time slot at least comprises a downlink symbol or a flexible symbol configured by a high-level signaling, and the flexible symbol comprises an uplink symbol and/or a downlink symbol;

or, the valid downlink timeslot is not included in the measurement interval of the terminal.

and determining a target sending time slot of the CSI-RS according to the CSI trigger information field of the first downlink DCI.

Wherein, the determining the target transmission time slot of the CSI-RS according to the CSI trigger information field of the first downlink DCI includes:

if the number of the first downlink DCIs is at least two and bit information indicated by a CSI trigger information field of each first downlink DCI is the same, determining a sending time slot of a CSI-RS indicated by each first downlink DCI as a target sending time slot of the CSI-RS;

and if the number of the first downlink DCIs is at least two, the bit information indicated by the CSI trigger information field of each first downlink DCI is different, and the CSI-RS in the same time slot is indicated in the at least two different CSI trigger information fields, determining the same time slot as a target sending time slot of the CSI-RS.

Wherein the first downlink DCI satisfies CSI processing delay;

the first downlink DCI meeting the CSI processing delay is that the ending position of the DCI and the starting position of the PUCCH resource are greater than or equal to CSI processing time.

Wherein the method further comprises:

and if HARQ-ACK corresponding to a PDSCH scheduled by second downlink DCI and HARQ-ACK corresponding to a PDSCH scheduled by first downlink DCI are fed back in the same PUCCH resource except the first downlink DCI, setting the bit occupied by the CSI trigger information domain in DCI which does not meet CSI processing time delay in the second downlink DCI to be zero or to be an arbitrary value.

If a second downlink DCI except the first downlink DCI exists, the PUCCH resource indicated by the first downlink DCI is different from the PUCCH resource indicated by the second downlink DCI;

and the second downlink DCI is DCI corresponding to other PDSCHs fed back on the same PUCCH resource by the HARQ-ACK of the PDSCH scheduled by the first downlink DCI.

Wherein the method further comprises:

detecting feedback information on a PUCCH resource indicated by first downlink DCI transmitted latest in the first downlink DCI, and if first transmission content is detected, demodulating according to the bit number of HARQ-ACK and CSI;

and if the first transmission content is not detected, detecting feedback information on PUCCH resources indicated by second downlink DCI which is transmitted latest in the second downlink DCI, and if the second transmission content is detected, demodulating according to the bit number of HARQ-ACK.

In order to achieve the above object, an embodiment of the present invention further provides an information transmission method, which is applied to a terminal, and includes:

receiving first downlink DCI sent by a base station, wherein the first downlink DCI is used for indicating a terminal to report aperiodic CSI, and HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicating the terminal are transmitted in the same PUCCH resource;

HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources.

Wherein, prior to the HARQ-ACK and aperiodic CSI sent on the PUCCH resources, the method further comprises:

and determining a CSI reporting time slot according to the CSI trigger information field of the first downlink DCI.

Wherein the method further comprises:

determining a CSI measurement resource.

Wherein the determining the CSI measurement resource comprises:

and determining CSI measurement resources according to the CSI reporting time slot.

Wherein the determining the CSI measurement resource comprises:

determining the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource according to the predefined CSI processing time;

and determining an effective downlink time slot which is closest to the aperiodic CSI reporting time slot in the effective downlink time slots with the interval with the aperiodic CSI reporting time slot being greater than or equal to the minimum time slot interval as a CSI measurement resource.

The effective downlink time slot at least comprises a downlink symbol or a flexible symbol or CSI-RS configured by a high-level signaling, and the flexible symbol comprises an uplink symbol and/or a downlink symbol;

Wherein the determining the CSI measurement resource comprises:

and determining a time slot in which the first downlink DCI which is transmitted latest in the received first downlink DCI is positioned as a CSI measurement resource.

In order to achieve the above object, an embodiment of the present invention further provides a base station, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

sending first Downlink Control Information (DCI) for indicating a terminal to report aperiodic Channel State Information (CSI) through a transceiver, wherein hybrid automatic repeat request acknowledgement (HARQ-ACK) corresponding to a Physical Downlink Shared Channel (PDSCH) scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicate the terminal to report are transmitted in the same Physical Uplink Control Channel (PUCCH) resource;

and receiving HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource through the transceiver.

Wherein the processor, when executing the program, further implements the steps of:

Wherein the first downlink DCI satisfies CSI processing delay;

In order to achieve the above object, an embodiment of the present invention further provides a base station, including:

a first sending module, configured to send first downlink control information DCI for instructing a terminal to report aperiodic channel state information CSI, where a hybrid automatic repeat request acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instruct the terminal to transmit in a same physical uplink control channel PUCCH resource;

and the first receiving module is used for receiving the HARQ-ACK and the aperiodic CSI sent by the terminal on the PUCCH resource.

Wherein the base station further comprises:

the first processing module is used for determining a target sending time slot of a channel state information reference signal (CSI-RS), and sending the CSI-RS in the target sending time slot.

Wherein the first processing module comprises:

the first processing unit is used for determining the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource according to the high-level signaling configuration or a predefined value;

and the second processing unit is used for determining an effective downlink time slot which is closest to the aperiodic CSI reporting time slot in the effective downlink time slots with the interval with the aperiodic CSI reporting time slot being greater than or equal to the minimum time slot interval as a target sending time slot of the CSI-RS.

Wherein the first processing module comprises:

and the third processing unit is used for determining a target sending time slot of the CSI-RS according to the CSI trigger information field of the first downlink DCI.

Wherein the third processing unit is specifically configured to: when the number of the first downlink DCIs is at least two and bit information indicated by a CSI trigger information field of each first downlink DCI is the same, determining a transmission time slot of a CSI-RS indicated by each first downlink DCI as a target transmission time slot of the CSI-RS;

and when the number of the first downlink DCIs is at least two, the bit information indicated by the CSI trigger information field of each first downlink DCI is different, and the CSI-RS in the same time slot is indicated in the at least two different CSI trigger information fields, determining the same time slot as a target sending time slot of the CSI-RS.

Wherein the first downlink DCI satisfies CSI processing delay;

Wherein the base station further comprises:

and the setting module is used for setting the bits occupied by the CSI trigger information domain in the DCI which does not meet the CSI processing time delay in the second downlink DCI to be zero or to be any value when the HARQ-ACK corresponding to the PDSCH scheduled by the second downlink DCI and the HARQ-ACK corresponding to the PDSCH scheduled by the first downlink DCI are fed back in the same PUCCH resource.

Wherein the base station further comprises:

a demodulation module, configured to detect feedback information on a PUCCH resource indicated by a first downlink DCI transmitted latest in the first downlink DCI, and perform demodulation according to bit numbers of HARQ-ACK and CSI if first transmission content is detected;

and when the first transmission content is not detected, detecting feedback information on PUCCH resources indicated by second downlink DCI which is transmitted latest in the second downlink DCI, and if the second transmission content is detected, demodulating according to the bit number of HARQ-ACK.

In order to achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the information transmission method as described above.

In order to achieve the above object, an embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

receiving first downlink DCI sent by a base station through a transceiver, wherein the first downlink DCI is used for indicating a terminal to report aperiodic CSI, and HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicate that the terminal reports are transmitted in the same PUCCH resource;

HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources by a transceiver.

determining a CSI measurement resource.

and determining the time slot of the first downlink DCI corresponding to the latest sending time slot in the received first downlink DCI as the CSI measurement resource.

In order to achieve the above object, an embodiment of the present invention further provides a terminal, including:

a second receiving module, configured to receive a first downlink DCI sent by a base station, where the first downlink DCI is used to instruct a terminal to report aperiodic CSI, and an HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instruct the terminal to transmit in a same PUCCH resource;

a second sending module, configured to send HARQ-ACK and aperiodic CSI on the PUCCH resource.

Wherein, the terminal further includes:

and a second processing module, configured to determine a CSI reporting slot according to a CSI trigger information field of the first downlink DCI before the HARQ-ACK and the aperiodic CSI that are sent on the PUCCH resource.

Wherein, the terminal further includes:

and the third processing module is used for determining the CSI measurement resource.

Wherein the third processing module comprises:

and the fourth processing unit is used for determining CSI measurement resources according to the CSI reporting time slot.

Wherein the third processing module comprises:

the fifth processing unit is used for determining the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource according to the predefined CSI processing time;

and a sixth processing unit, configured to determine, as a CSI measurement resource, an effective downlink timeslot that is closest to the aperiodic CSI reporting timeslot in the effective downlink timeslots whose interval with the aperiodic CSI reporting timeslot is greater than or equal to the minimum timeslot interval.

Wherein the third processing module comprises:

and a seventh processing unit, configured to determine, as a CSI measurement resource, a time slot in which a first downlink DCI transmitted latest in the received first downlink DCI is located.

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

in the technical solution of the embodiment of the present invention, by sending the first downlink control information DCI for instructing the terminal to report the aperiodic channel state information CSI, the HARQ-ACK is confirmed by the hybrid automatic repeat request corresponding to the PDSCH of the physical downlink shared channel scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instructing the terminal to transmit in the same PUCCH resource of the physical uplink control channel; and receiving the HARQ-ACK and the aperiodic CSI sent by the terminal on the PUCCH resource, so that the aperiodic CSI can be transmitted through the PUCCH format, the downlink control overhead is reduced, and the transmission delay of the aperiodic CSI is reduced.

Drawings

Fig. 1 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a second exemplary information transmission method according to the present invention;

fig. 3 is a schematic diagram illustrating an example of a corresponding information transmission method according to an embodiment of the present invention;

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

fig. 5 is a block diagram of a base station according to an embodiment of the present invention;

fig. 6 is a block diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a block diagram of a terminal 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.

As shown in fig. 1, an information transmission method provided for an embodiment of the present invention is applied to a base station, and includes:

step 101: sending first Downlink Control Information (DCI) for indicating a terminal to report aperiodic Channel State Information (CSI), wherein the hybrid automatic repeat request acknowledgement (HARQ-ACK) corresponding to a Physical Downlink Shared Channel (PDSCH) scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicate that the terminal reports the CSI to be transmitted in the same Physical Uplink Control Channel (PUCCH) resource;

in this step, the downlink DCI includes a CSI trigger information field, where the CSI trigger information field is used to indicate whether the terminal reports the aperiodic CSI. Specifically, whether the terminal reports the aperiodic CSI can be indicated by assigning different values to bits occupied by the CSI trigger information field.

For example, the CSI trigger information field occupies two bits, and if the bit information is "00", the CSI trigger information field is used to indicate that the terminal does not report the aperiodic CSI; and if the bit information is '10', indicating the terminal to report the aperiodic CSI.

Here, the CSI trigger information field in the first downlink DCI instructs the terminal to report the aperiodic CSI.

Step 102: and receiving HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource.

In the information transmission method of the embodiment of the invention, by sending the first downlink control information DCI for indicating the terminal to report the aperiodic channel state information CSI, the hybrid automatic repeat request acknowledgement HARQ-ACK corresponding to the PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicating terminal are transmitted in the same physical uplink control channel PUCCH resource; and receiving the HARQ-ACK and the aperiodic CSI sent by the terminal on the PUCCH resource, so that the aperiodic CSI can be transmitted through the PUCCH format, the downlink control overhead is reduced, and the transmission delay of the aperiodic CSI is reduced.

Optionally, in a preferred embodiment of the present invention, before step 102, the method may further include the steps of:

Here, the terminal may perform CSI measurement based on the CSI-RS transmitted by the base station.

Here, the determining of the target transmission slot of the CSI-RS in this step may specifically include the following two implementation manners.

The first method is as follows:

Preferably, the valid downlink timeslot at least includes a downlink symbol configured by a higher layer signaling or a flexible symbol, where the flexible symbol includes an uplink symbol and/or a downlink symbol; or, the valid downlink timeslot is not included in the measurement interval of the terminal.

The second method comprises the following steps:

Specifically, the method may further include the following steps:

that is to say, the CSI trigger information field of each first downlink DCI indicates the same bit information, and the CSI-RS offset slot corresponding to the CSI trigger information field of each first downlink DCI is 0, the transmission slot of the CSI-RS indicated by each first downlink DCI, that is, the slot in which each first downlink DCI is located, is determined as the target transmission slot of the CSI-RS, that is, the CSI-RS is transmitted in the CSI-RS transmission slot indicated by each first downlink DCI.

It should be noted that different CSI trigger information fields indicate the same CSI reporting information (such as reporting CSI format, CSI bit number, etc.) but different CSI-RS slot offsets.

Here, different CSI trigger information fields indicate CSI-RS in the same timeslot, and the same timeslot is a target transmission timeslot of the CSI-RS.

Preferably, the first downlink DCI satisfies CSI processing latency;

It should be noted that the ending position of the DCI specifically refers to an ending position of a resource occupied by the transmission of the DCI.

Further, in another preferred embodiment, the method may further include:

In order to avoid that the terminal misses all DCI indicating aperiodic CSI reporting, in a preferred embodiment of the present invention, if there is a second downlink DCI other than the first downlink DCI, a PUCCH resource indicated by the first downlink DCI is different from a PUCCH resource indicated by the second downlink DCI;

Based on the above, when there is a second downlink DCI other than the first downlink DCI, the method may further include:

Note that, the HARQ-ACK here includes: HARQ-ACK corresponding to the PDSCH scheduled by the first downlink DCI and HARQ-ACK corresponding to the PDSCH scheduled by the second downlink DCI.

The following describes the implementation of the method of the present invention in detail with respect to an example.

As shown in fig. 2, it is assumed that the base station uses slot scheduling, PDSCH transmission is scheduled in slot n, and HARQ-ACK feedback information of the PDSCH is transmitted in slot n +4 is indicated through downlink DCI.

In slot n +1, the base station schedules PDSCH transmission and triggers the terminal to transmit aperiodic CSI, and HARQ-ACK feedback information and aperiodic CSI information of the PDSCH are transmitted in slot n +4 through downlink DCI indication.

If the base station still needs to schedule the PDSCH in slot n +2 and/or slot n +3, and still indicates the HARQ-ACK information corresponding to the PDSCH and the HARQ-ACK information corresponding to the PDSCH in slot n and slot n +1 through downlink DCI to perform multiplexing feedback on the same PUCCH, and the base station sets the non-periodic CSI transmission also to be triggered in the scheduling DCI of slot n +2, the following three ways can be adopted to determine the time slot for transmitting the CSI-RS.

The first mode is as follows:

the base station determines a CSI-RS transmission time slot based on the aperiodic CSI reporting time slot, and since the downlink DCI triggers aperiodic CSI reporting in a slot n +4 and the base station indicates that the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource is 2, the corresponding CSI-RS transmission time slot is n + 2.

Here, this approach may specifically correspond to the first approach in the above implementation of determining the target transmission slot of the CSI-RS.

The second mode is as follows:

the base station indicates the same bit information in the CSI trigger information domains of slot n +2 and slot n +1, and the base station sends CSI-RS in slot n +1 and slot n +2 on the assumption that the CSI-RS offset time slot corresponding to the CSI trigger information domain is 0.

The third mode is as follows:

the method includes the steps that a base station indicates different bit information in CSI trigger information domains of slot n +2 and slot n +1, and indicates a terminal to carry out same aperiodic CSI reporting on the same PUCCH resource of slot n +4, and the difference is that the CSI-RS offset time slot corresponding to the CSI trigger information domain in slot n +1 is 1, the CSI-RS offset time slot corresponding to the CSI trigger information domain in slot n +2 is 0, and the base station only sends CSI-RS in slot n + 2.

Here, the second and third aspects correspond to the second aspect in the above-described implementation of determining a target transmission slot of the CSI-RS.

In addition, assuming that slot n +3 cannot satisfy the CSI processing delay, the base station may set the CSI trigger information field bits of the scheduling downlink DCI of slot n +3 to all 0, or the base station may select to set the CSI trigger information field bits of the scheduling downlink DCI of slot n +3 to an arbitrary value, and at this time, the terminal may ignore the CSI trigger information field content in the downlink DCI that does not satisfy the CSI processing delay.

In order to avoid that the terminal misses all DCI indicating aperiodic CSI reporting, the base station may respectively indicate different PUCCH resources in the downlink DCI corresponding to slot n, slot n +1/n +2, and slot n +3, for example, the base station indicates the terminal to use PUCCH resource 1 in the downlink DCI of slot n, indicates the terminal to use PUCCH resource 2 in the downlink DCI corresponding to slot n +1/n +2, and indicates the terminal to use PUCCH resource 3 in the downlink DCI corresponding to slot n + 3.

Thus, if the terminal missed detects the downlink DCI of slot n +1/n +2, the terminal only feeds back the HARQ-ACK information on PUCCH resource 3 of slot n + 4.

And if the terminal receives all DCI, the terminal feeds back HARQ-ACK and CSI information on PUCCH resource 2 of slot n + 4.

If the terminal fails to detect the downlink DCI of slot n +1/n +2/n +3, the terminal feeds back HARQ-ACK information only on PUCCH resource 1 of slot n +4, and the base station can determine whether the terminal has the failure detection condition of the downlink DCI or not through blind detection of different PUCCH resources.

As shown in fig. 3, an information transmission method provided for an embodiment of the present invention is applied to a terminal, and includes:

step 301: receiving first downlink DCI sent by a base station, wherein the first downlink DCI is used for indicating a terminal to report aperiodic CSI, and HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicating the terminal are transmitted in the same PUCCH resource;

in this step, the downlink DCI includes a CSI trigger information field, where the CSI trigger information field is used to indicate whether the terminal reports the aperiodic CSI. Specifically, the terminal can determine whether to report the aperiodic CSI by assigning different values to bits occupied by the CSI trigger information field.

Step 302: HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources.

According to the information transmission method, first downlink DCI sent by a base station is received, the first downlink DCI is used for indicating a terminal to report aperiodic CSI, and HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicating terminal are transmitted in the same PUCCH resource; and the HARQ-ACK and the aperiodic CSI are sent on the PUCCH resource, so that the aperiodic CSI can be transmitted through a PUCCH format, the downlink control overhead is reduced, and the transmission delay of the aperiodic CSI is reduced.

It should be noted that the terminal ignores the CSI trigger information field content in the downlink DCI that does not satisfy the CSI processing delay.

In a preferred embodiment of the present invention, before step 302, the method further comprises:

Further, the method further comprises:

determining a CSI measurement resource.

Here, after determining the CSI measurement resource, the terminal performs CSI measurement on the measurement resource and performs CSI reporting on the CSI reporting slot.

Specifically, the determining the CSI measurement resource in this step may include the following three implementation manners.

And in the mode A, the CSI measurement resource is determined according to the CSI reporting time slot.

In the mode B, the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource is determined according to the predefined CSI processing time;

Preferably, the valid downlink timeslot at least includes a downlink symbol configured by a higher layer signaling or a flexible symbol or CSI-RS, where the flexible symbol includes an uplink symbol and/or a downlink symbol;

It should be noted that, the terminal determines whether the CSI-RS is included in the valid downlink timeslot according to the DCI indication.

In the mode C, the time slot where the first downlink DCI transmitted latest in the received first downlink DCI is located is determined as the CSI measurement resource.

Continuing to take the example shown in fig. 2 as an example, when determining a reference resource of aperiodic CSI transmitted in slot n +4, the terminal selects an effective downlink slot that satisfies CSI processing delay and is closest to a CSI reporting slot, assuming that the CSI processing delay is 30 symbols, one slot includes 14 symbols, PUCCH2 occupies the last 3 symbols in slot n +4, the base station indicates, through downlink DCI, that the terminal has CSI-RS in both slot n +1 and slot n +2, or indicates, through downlink DCI, that the terminal has CSI-RS in slot n +2, and then the terminal uses slot n +2 as a reference subframe of aperiodic CSI; or, assuming that the minimum time slot interval between the aperiodic CSI reporting time slot and the CSI measurement resource configured by the high-level signaling is 3, the terminal uses slot n +1 as a reference subframe of the aperiodic CSI; or, the terminal considers that the time slot of the downlink DCI triggering the CSI feedback in one PUCCH can meet the CSI processing time delay, and the terminal takes the slot n +2 triggering the aperiodic CSI reporting at the last time as the reference subframe of the aperiodic CSI.

As shown in fig. 4, an embodiment of the present invention further provides a base station, including: a transceiver 410, a memory 420, a processor 400 and a computer program stored on the memory and executable on the processor, the processor 400 implementing the following steps when executing the computer program:

sending, by a transceiver 410, first downlink control information DCI for instructing a terminal to report aperiodic channel state information CSI, where a hybrid automatic repeat request acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instruct the terminal to transmit in a same physical uplink control channel PUCCH resource;

HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource are received by the transceiver 410.

Where in fig. 4, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors, represented by processor 400, and memory, represented by memory 420, 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 410 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 400 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 400 in performing operations.

Optionally, the processor 400 implements the following steps when executing the computer program:

Preferably, the valid downlink timeslot at least includes a downlink symbol configured by a higher layer signaling or a flexible symbol, where the flexible symbol includes an uplink symbol and/or a downlink symbol;

Preferably, the first downlink DCI satisfies CSI processing latency;

Preferably, if there is a second downlink DCI other than the first downlink DCI, the PUCCH resource indicated by the first downlink DCI is different from the PUCCH resource indicated by the second downlink DCI;

As shown in fig. 5, an embodiment of the present invention further provides a base station, including:

a first sending module 501, configured to send first downlink control information DCI for instructing a terminal to report aperiodic channel state information CSI, where a hybrid automatic repeat request acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instruct the terminal to transmit in a same physical uplink control channel PUCCH resource;

a first receiving module 502, configured to receive HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource.

The base station of the embodiment of the invention further comprises:

In the base station of the embodiment of the present invention, the first processing module may include:

In the base station of the embodiment of the present invention, the third processing unit is specifically configured to: when the number of the first downlink DCIs is at least two and bit information indicated by a CSI trigger information field of each first downlink DCI is the same, determining a transmission time slot of a CSI-RS indicated by each first downlink DCI as a target transmission time slot of the CSI-RS;

Preferably, the first downlink DCI satisfies CSI processing latency;

The base station of the embodiment of the invention further comprises:

In the base station of the embodiment of the invention, a first downlink control information DCI used for indicating a terminal to report aperiodic channel state information CSI is sent by a first sending module, and a hybrid automatic repeat request acknowledgement HARQ-ACK corresponding to a physical downlink shared channel PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicating terminal are transmitted in the same physical uplink control channel PUCCH resource; the first receiving module receives HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource, so that the aperiodic CSI can be transmitted through the PUCCH format, downlink control overhead is reduced, and transmission delay of the aperiodic CSI is reduced.

In some embodiments of the invention, there is also provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

When executed by the processor, the program can implement all the implementation manners applied to the method embodiment on the base station side shown in fig. 1, and details are not described here for avoiding repetition.

As shown in fig. 6, an embodiment of the present invention further provides a terminal, including: comprising a memory 620, a processor 600, a transceiver 610, a bus interface and a computer program stored on the memory 620 and executable on the processor 600, the processor 600 being adapted to read the program in the memory 620 and to execute the following processes:

receiving, by a transceiver 610, first downlink DCI sent by a base station, where the first downlink DCI is used to instruct a terminal to report aperiodic CSI, and a HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instruct the terminal to transmit in the same PUCCH resource;

HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources by the transceiver 610.

Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. 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 610 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 user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.

Optionally, the processor 600 may further implement the following steps when executing the computer program:

and before the HARQ-ACK and the aperiodic CSI sent on the PUCCH resource, determining a CSI reporting time slot according to a CSI trigger information domain of the first downlink DCI.

determining a CSI measurement resource.

As shown in fig. 7, an embodiment of the present invention further provides a terminal, including:

a second receiving module 701, configured to receive a first downlink DCI sent by a base station, where the first downlink DCI is used to instruct a terminal to report aperiodic CSI, and an HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI instruct the terminal to transmit in a same PUCCH resource;

a second sending module 702, configured to send HARQ-ACK and aperiodic CSI on the PUCCH resource.

The terminal of this embodiment, further includes:

In the terminal of this embodiment, the third processing module includes:

The terminal of the embodiment of the invention receives first downlink DCI sent by a base station through a second receiving module, wherein the first downlink DCI is used for indicating the terminal to report aperiodic CSI, and HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicate that the terminal reports the aperiodic CSI to be transmitted in the same PUCCH resource; the second sending module sends the HARQ-ACK and the aperiodic CSI on the PUCCH resources, so that the aperiodic CSI can be transmitted through a PUCCH format, downlink control overhead is reduced, and transmission delay of the aperiodic CSI is reduced.

receiving first downlink DCI sent by a base station, wherein the first downlink DCI is used for indicating a terminal to report aperiodic CSI, and HARQ-ACK corresponding to a PDSCH scheduled by the first downlink DCI and the aperiodic CSI reported by the first downlink DCI indicating the terminal are transmitted in the same PUCCH resource; HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources.

When executed by the processor, the program can implement all the implementation manners in the embodiment of the method applied to the terminal side shown in fig. 3, and details are not described here for avoiding repetition.

In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An information transmission method applied to a base station, comprising:

receiving HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resources;

the method further comprises the following steps:

determining a target sending time slot of a channel state information reference signal (CSI-RS), and sending the CSI-RS in the target sending time slot;

the determining the target transmission time slot of the channel state information reference signal CSI-RS comprises:

determining an effective downlink time slot which is closest to the aperiodic CSI reporting time slot in the effective downlink time slots with the interval larger than or equal to the minimum time slot interval as a target sending time slot of the CSI-RS; alternatively, the first and second electrodes may be,

determining a target sending time slot of the CSI-RS according to the CSI trigger information field of the first downlink DCI;

the determining a target transmission time slot of the CSI-RS according to the CSI trigger information field of the first downlink DCI includes:

2. The information transmission method according to claim 1, wherein the valid downlink timeslot includes at least one downlink symbol of a higher layer signaling configuration or a flexible symbol, and the flexible symbol includes an uplink symbol and/or a downlink symbol;

3. The information transmission method according to claim 1, wherein the first downlink DCI satisfies CSI processing latency;

4. The information transmission method according to claim 3, wherein the method further comprises:

5. The information transmission method according to claim 1, wherein if there is a second downlink DCI other than the first downlink DCI, a PUCCH resource indicated by the first downlink DCI is different from a PUCCH resource indicated by the second downlink DCI;

6. The information transmission method according to claim 5, wherein the method further comprises:

7. An information transmission method applied to a terminal is characterized by comprising the following steps:

HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources;

prior to the HARQ-ACK and aperiodic CSI sent on the PUCCH resources, the method further comprises:

determining a CSI reporting time slot according to the CSI trigger information domain of the first downlink DCI;

the method further comprises the following steps:

determining a CSI measurement resource according to the CSI reporting time slot, comprising:

determining an effective downlink time slot which is closest to the aperiodic CSI reporting time slot in the effective downlink time slots with the interval larger than or equal to the minimum time slot interval as a CSI measurement resource;

or, determining CSI measurement resources according to the received first downlink DCI, including:

8. The information transmission method according to claim 7, wherein the valid downlink timeslot at least includes one downlink symbol configured by higher layer signaling or a flexible symbol or CSI-RS, and the flexible symbol includes an uplink symbol and/or a downlink symbol;

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

receiving HARQ-ACK and aperiodic CSI sent by a terminal on the PUCCH resource through a transceiver;

the processor, when executing the program, further implements the steps of:

10. The base station according to claim 9, wherein the valid downlink timeslot comprises at least one downlink symbol of a higher layer signaling configuration or a flexible symbol, and the flexible symbol comprises an uplink symbol and/or a downlink symbol;

11. The base station of claim 9, wherein the first downlink DCI satisfies CSI processing latency;

12. The base station of claim 11, wherein the processor when executing the program further performs the steps of:

13. The base station of claim 9, wherein if there is a second downlink DCI other than the first downlink DCI, a PUCCH resource indicated by the first downlink DCI is different from a PUCCH resource indicated by the second downlink DCI;

14. The base station of claim 13, wherein the processor when executing the program further performs the steps of:

15. A base station, comprising:

a first receiving module, configured to receive HARQ-ACK and aperiodic CSI sent by the terminal on the PUCCH resource;

the base station further comprises:

the device comprises a first processing module, a second processing module and a third processing module, wherein the first processing module is used for determining a target sending time slot of a channel state information reference signal (CSI-RS) and sending the CSI-RS in the target sending time slot;

the first processing module comprises:

a second processing unit, configured to determine, as a target transmission timeslot of the CSI-RS, an effective downlink timeslot that is closest to the aperiodic CSI reporting timeslot in an effective downlink timeslot whose interval with the aperiodic CSI reporting timeslot is greater than or equal to the minimum timeslot interval; alternatively, the first and second electrodes may be,

the first processing module comprises:

a third processing unit, configured to determine a target transmission timeslot of a CSI-RS according to a CSI trigger information field of the first downlink DCI;

the third processing unit is specifically configured to: when the number of the first downlink DCIs is at least two and bit information indicated by a CSI trigger information field of each first downlink DCI is the same, determining a transmission time slot of a CSI-RS indicated by each first downlink DCI as a target transmission time slot of the CSI-RS;

16. The base station according to claim 15, wherein the valid downlink timeslot comprises at least one downlink symbol of a higher layer signaling configuration or a flexible symbol, and the flexible symbol comprises an uplink symbol and/or a downlink symbol;

17. The base station of claim 15, wherein the first downlink DCI satisfies CSI processing latency;

18. The base station of claim 17, wherein the base station further comprises:

19. The base station of claim 15, wherein if there is a second downlink DCI other than the first downlink DCI, a PUCCH resource indicated by the first downlink DCI is different from a PUCCH resource indicated by the second downlink DCI;

20. The base station of claim 19, wherein the base station further comprises:

21. 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 information transmission method according to one of claims 1 to 6.

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

HARQ-ACK and aperiodic CSI transmitted on the PUCCH resources by a transceiver;

the processor, when executing the program, further implements the steps of:

determining CSI measurement resources according to the CSI reporting time slot;

the processor, when executing the program, further implements the steps of:

or, the processor further implements the following steps when executing the program:

determining CSI measurement resources according to the received first downlink DCI;

the processor, when executing the program, further implements the steps of:

23. The terminal according to claim 22, wherein the valid downlink timeslot comprises at least one downlink symbol of a higher layer signaling configuration or a flexible symbol or CSI-RS, and the flexible symbol comprises an uplink symbol and/or a downlink symbol;

24. A terminal, comprising:

a second transmitting module, configured to transmit HARQ-ACK and aperiodic CSI on the PUCCH resource;

the terminal further comprises:

a second processing module, configured to determine a CSI reporting slot according to a CSI trigger information field of the first downlink DCI before the HARQ-ACK and the aperiodic CSI that are sent on the PUCCH resource;

the terminal further comprises:

the third processing module is used for determining CSI measurement resources according to the CSI reporting time slot;

the third processing module comprises:

a sixth processing unit, configured to determine, as a CSI measurement resource, an effective downlink timeslot that is closest to the aperiodic CSI reporting timeslot in an effective downlink timeslot whose interval with the aperiodic CSI reporting timeslot is greater than or equal to the minimum timeslot interval;

or, the terminal further includes:

25. The terminal according to claim 24, wherein the valid downlink timeslot comprises at least one downlink symbol of a higher layer signaling configuration or a flexible symbol or CSI-RS, and the flexible symbol comprises an uplink symbol and/or a downlink symbol;

26. 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 information transmission method according to one of claims 7 to 8.