CN106559893B

CN106559893B - Downlink scheduling indication method, device, base station and terminal

Info

Publication number: CN106559893B
Application number: CN201510623607.XA
Authority: CN
Inventors: 侯雪颖; 胡丽洁; 沈晓冬
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2015-09-25
Filing date: 2015-09-25
Publication date: 2020-05-01
Anticipated expiration: 2035-09-25
Also published as: CN106559893A

Abstract

The invention provides a method, a device, a base station and a terminal for indicating downlink scheduling, wherein the method comprises the following steps: generating Downlink Control Information (DCI) which needs to be sent to a terminal, wherein the DCI comprises information for representing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier; the invention can ensure that the carrier number understood by the base station and the terminal is consistent with the number of the transmission data blocks when the base station and the terminal determine the feedback format and the feedback resource based on the dynamically scheduled carrier number, thereby reducing the feedback overhead.

Description

Downlink scheduling indication method, device, base station and terminal

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a method, an apparatus, a base station, and a terminal for indicating downlink scheduling.

Background

In the tenth version of Long Term Evolution (LTE), a carrier aggregation function is introduced, and Control information (Channel state report, hybrid automatic repeat request, scheduling request) of layer 1/layer 2 is transmitted on an Uplink resource located on a Physical Uplink Control Channel (PUCCH) dedicated to transmit Uplink layer 1/layer 2 Control information. The PUCCH feedback under carrier aggregation supported by two formats is introduced for carrier aggregation:

the first is Format1b (Format 1b), which can support the feedback of carrier aggregation of at most 2 serving cells (serving cells), and carry at most 4 feedback bits (bits) of correct transmission indication or erroneous transmission indication (a/N, ACK/NACK);

the first is Format 3(Format 3), which can support Hybrid Automatic Repeat reQuest (HARQ) feedback under carrier aggregation of at most 5 serving cells, and for Frequency Division Duplex (FDD), ACK/NACK information of at most 10 bits needs to be fed back; for Time Division Duplex (TDD) to feed back ACK/NACK bit information of 20 bits at most, if a plurality of downlink subframes correspond to one uplink subframe and the number of ACK/NACK bits to be fed back is greater than 20, 2 codewords of the downlink subframe of each serving cell need to be spatially bound by the ACK/NACK bit.

And as for which format the terminal specifically adopts for feedback, the configuration is carried out by a high layer. In a carrier aggregation scenario, a user can only feed back one PUCCH in a primary carrier (Pcell).

The A/N feedback bit number determination, feedback format determination mode and feedback process of the existing protocol supporting carrier aggregation are as follows:

step one, a base station configures the number of aggregated carriers and specific carriers for a terminal, wherein the configuration is realized through Radio Resource Control (RRC) signaling;

secondly, the base station configures the feedback format of the PUCCH for the terminal, namely which PUCCH format is adopted to feed back the A/N, and the configuration is realized through RRC signaling;

thirdly, the terminal determines the bit number of A/N feedback based on the carrier number and duplex mode configured by RRC signaling, and if the carrier number and duplex mode are TDD, according to the time slot ratio and the transmission block number of the TDD;

fourthly, after the number of feedback bits is determined, transmitting the feedback format based on RRC configuration;

fifthly, when the terminal is configured with PUCCH format3 for transmission but only Pcell is scheduled for 1 subframe transmission in the feedback window, the terminal automatically falls back to PUCCH format1a (format 1a) or PUCCH format1b for transmission; and the base station side detects the PUCCH format3 and the PUCCH format1a/1b at the same time so as to avoid the mismatch of understanding between the terminal and the base station in the RRC configuration ambiguity period.

While for carrier aggregation enhancements, the goal of current protocol design is to support carrier aggregation techniques for 32 carriers. Since the current feedback format supports 5-carrier aggregation at most, a new uplink control information feedback format must be designed to support a/N feedback of 32-carrier aggregation.

For more carrier aggregation, the base station may configure a larger number of carriers for the terminal, but may dynamically schedule which carriers are used for current carrier aggregation transmission for the terminal in consideration of load conditions of different carriers.

If the feedback number is transmitted based on RRC configuration regardless of how many carriers are scheduled for the terminal based on the existing protocol, the feedback resource is wasted. For example, the base station configures an a/N feedback format supporting 32 carrier aggregation for the terminal through RRC signaling, and only a few carriers are scheduled for the user to perform carrier aggregation transmission during scheduling, which would result in resource waste if the feedback format is configured.

In order to reduce feedback overhead, the base station and the terminal may be made to perform feedback format determination and feedback resource determination based on the number of dynamically scheduled carriers. However, there is a possibility that detection omission of Downlink Control Information (DCI) downlink detection by the terminal may cause a problem that the number of scheduling carriers understood by the terminal and the number of scheduling carriers used by the base station are not consistent. In addition, since the number of transmission data blocks sent by the base station to the terminal on a certain carrier is also informed by the DCI information, if the terminal detects a DCI missing, the number of transmission data blocks sent to the terminal on the carrier cannot be known, which results in inconsistency between the number of scheduling transmission data blocks understood by the terminal and the number of scheduling transmission data blocks used by the base station.

Disclosure of Invention

The embodiments of the present invention provide a method, an apparatus, a base station, and a terminal for downlink scheduling indication, which can ensure that when the base station and the terminal determine a feedback format and a feedback resource based on a dynamically scheduled carrier number, the carrier number understood by the terminal and the base station is consistent with the number of transmission data blocks, thereby reducing feedback overhead.

In order to achieve the above object, an embodiment of the present invention provides a method for indicating downlink scheduling, which is applied to a base station, and the method includes:

generating Downlink Control Information (DCI) which needs to be sent to a terminal, wherein the DCI comprises information for representing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

and transmitting the DCI to the terminal.

The generating of the DCI which needs to be sent to the terminal specifically includes:

judging whether indication information for representing whether A/N binding needs to be carried out on the current scheduled carrier or not needs to be added in DCI to be sent to a terminal or not;

when indication information for representing whether A/N binding needs to be performed on the currently scheduled carrier or not does not need to be added in the DCI to be sent to the terminal, fields for representing the information of the currently scheduled carrier and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier are added in the DCI to be sent to the terminal, and the DCI is obtained.

When the terminal works in the frequency division duplex frequency band, the information of the currently scheduled carrier is the information of the currently scheduled transmission data block, and the information of all scheduled carriers on the subframe corresponding to the currently scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier.

Wherein, the information of the currently scheduled transmission data block comprises:

a first sum of the number of transmission data blocks on the currently scheduled carrier and the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier, or,

the number of all transport data blocks of the carrier scheduled before the currently scheduled carrier.

The method includes the steps of adding fields for representing information of a currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier to a DCI to be sent to a terminal to obtain the DCI, and specifically includes:

calculating a field for representing the first sum by using a formula DCI _ i { (K _ i-1), N _ index } +1, wherein DCI _ i is the field for representing the first sum, K _ i is the first sum, and N _ index is a modulus parameter;

calculating a field for representing the total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier by using a formula DCI _ total { (K _ total-1), wherein DCI _ total is a field for representing the total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, K _ total is the total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter;

and adding the DCI _ i and the DCI _ total to DCI to be sent to the terminal to obtain the DCI.

Wherein, the method further comprises:

when indication information for representing whether A/N binding needs to be carried out on the currently scheduled carrier is required to be added in DCI to be sent to a terminal, and the terminal works in a time division duplex frequency band, further judging whether A/N binding needs to be carried out on the currently scheduled carrier;

when the A/N binding of the current scheduled carrier is not needed, adding indication information which does not need the A/N binding of the current scheduled carrier, a field used for representing the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window, and a field used for representing the information of the current scheduled carrier and the information of all the scheduled carriers on the subframe corresponding to the current scheduled carrier into DCI to obtain the DCI, wherein the information of the current scheduled carrier is the information of the current scheduled transmission data blocks, and the information of all the scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all the scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier.

Wherein, the method further comprises:

when the currently scheduled carrier needs to be A/N bound, adding indication information needing to A/N bind the currently scheduled carrier in DCI to be sent to a terminal, a field for representing the number of the scheduled carriers on all scheduled subframes in a current feedback window, and fields for representing the information of the currently scheduled carrier and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier to obtain the DCI, wherein the information of the currently scheduled carrier comprises: the number of all carriers scheduled before the current scheduled carrier of the current scheduled carrier and the subframe corresponding to the current scheduled carrier is a second sum of the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the current scheduled carrier in the current feedback window, and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled carriers on the subframe corresponding to the current scheduled carrier.

The method for obtaining the DCI includes adding indication information that needs to perform a/N binding on a currently scheduled carrier to DCI to be sent to a terminal, a field for representing the number of scheduled carriers on all scheduled subframes in a current feedback window, and a field for representing information of the currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, and specifically includes:

calculating a field for representing a second sum by using a formula DCI _ i { (K _ i-1), N _ index } +1, wherein DCI _ i is the field for representing the second sum, K _ i is the second sum, and N _ index is a modulus parameter;

calculating a field for representing the total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier by using a formula DCI _ total { (K _ total-1), wherein DCI _ total is a field for representing the total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier, K _ total is the total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter;

calculating a field for representing the number of scheduled carriers on all scheduled subframes in a current feedback window by using a formula DCI _ total _ all { (K _ total _ all-1), N _ total _ all } +1, wherein DCI _ total _ all is a field for representing the number of scheduled carriers on all scheduled subframes in the current feedback window, K _ total _ all is the number of scheduled carriers on all scheduled subframes in the current feedback window, and N _ total _ all is a modulus parameter;

and adding indication information, DCI _ i, DCI _ total and DCI _ total _ all which need to perform A/N binding on the currently scheduled carrier to the DCI to be sent to the terminal to obtain the DCI.

the number of transmission data blocks of the currently scheduled carrier, the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier in the subframe corresponding to the currently scheduled carrier, and a third sum of the number of all transmission data blocks of all scheduled carriers in the current feedback window on the subframe scheduled before the subframe corresponding to the currently scheduled carrier.

Adding indication information which does not need to perform A/N binding on a currently scheduled carrier, a field for representing the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window, and a field for representing information of the currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier to a DCI to be sent to a terminal to obtain the DCI, wherein the indication information specifically comprises:

calculating a field for representing a third sum by using a formula DCI _ i { (K _ i-1), N _ index } +1, wherein DCI _ i is the field for representing the third sum, K _ i is the third sum, and N _ index is a modulus parameter;

calculating a field for representing the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window by using a formula DCI _ total _ all { (K _ total _ all-1), N _ total _ all } +1, wherein DCI _ total _ all is a field for representing the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window, K _ total _ all is the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window, and N _ total _ all is a modulus parameter;

and adding indication information, DCI _ i, DCI _ total and DCI _ total _ all which do not need to carry out A/N binding on the currently scheduled carrier to the DCI to be sent to the terminal to obtain the DCI.

The embodiment of the invention also provides a device for indicating downlink scheduling, which is applied to a base station and comprises the following components:

a generating module, configured to generate DCI which needs to be sent to a terminal, where the DCI includes information for characterizing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

and the sending module is used for sending the DCI to the terminal.

Wherein, the generation module includes:

a judging unit, configured to judge whether indication information for indicating whether a currently scheduled carrier needs to be a/N bonded needs to be added to DCI to be sent to a terminal, and trigger a first adding unit when the indication information for indicating whether the currently scheduled carrier needs to be a/N bonded does not need to be added to DCI to be sent to the terminal;

and the first adding unit is used for adding fields used for representing the information of the current scheduled carrier and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier in the DCI to be sent to the terminal according to the trigger of the judging unit to obtain the DCI.

Wherein, the device still includes:

the judging module is used for further judging whether the currently scheduled carrier wave needs to be subjected to A/N binding or not when the judging unit judges that the indicating information for representing whether the currently scheduled carrier wave needs to be subjected to A/N binding or not is added to the DCI to be sent to the terminal and the terminal works in a time division duplex frequency band, and triggering the first adding module when the currently scheduled carrier wave does not need to be subjected to A/N binding;

a first adding module, configured to add, according to the trigger of the determining module, indication information that does not need to perform a/N binding on a currently scheduled carrier, a field for characterizing the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window, and a field for characterizing information of the currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, to obtain DCI, where the information of the currently scheduled carrier is information of the currently scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier is the total number of all scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier.

Wherein, the device still includes:

a second adding module, configured to, when the determining module determines that a/N bonding needs to be performed on a currently scheduled carrier, add, to DCI to be sent to a terminal, indication information that a/N bonding needs to be performed on the currently scheduled carrier, a field used to represent the number of scheduled carriers on all scheduled subframes in a current feedback window, and a field used to represent information of the currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, to obtain DCI, where the information of the currently scheduled carrier includes: the number of all carriers scheduled before the current scheduled carrier of the current scheduled carrier and the subframe corresponding to the current scheduled carrier is a second sum of the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the current scheduled carrier in the current feedback window, and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled carriers on the subframe corresponding to the current scheduled carrier.

The embodiment of the invention also provides a base station which comprises the device for indicating the downlink scheduling.

The embodiment of the invention also provides a method for indicating downlink scheduling, which is applied to a terminal and comprises the following steps:

receiving Downlink Control Information (DCI) sent by a base station, wherein the DCI comprises information for representing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

and determining the feedback format of the correct transmission indication or the error transmission indication A/N according to the DCI.

Wherein, the information of the current scheduled carrier is the information of the current scheduled transmission data block, the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier, correspondingly,

determining a feedback format of a correct transmission indication or an error transmission indication A/N according to the DCI, specifically comprising:

determining the number of the transmission data blocks actually scheduled by the base station according to the information of the transmission data blocks currently scheduled and the total number of all the scheduled transmission data blocks on the subframe corresponding to the carrier currently scheduled;

and determining the feedback format of the A/N according to the number of the transmission data blocks actually scheduled by the base station.

Wherein, the information of the current scheduled carrier is the information of the current scheduled transmission data block, the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier, and when the DCI also includes indication information that the A/N binding of the current scheduled carrier is not required and a field for representing the number of the scheduled transmission data blocks on all scheduled subframes in the current feedback window,

determining the number of transmission data blocks actually scheduled by the base station according to indication information which does not need to perform A/N binding on the currently scheduled carrier, information of the currently scheduled transmission data blocks and the total number of all the scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier;

The determining the number of transmission data blocks actually scheduled by the base station specifically includes:

detecting whether a first subframe of the missed DCI exists according to the total number and the third sum of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier and the number of the scheduled transmission data blocks on all scheduled subframes in a current feedback window;

and when the first subframe of the missed DCI exists, taking the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window as the number of the transmission data blocks actually scheduled by the base station.

Wherein, the information of the current scheduled carrier comprises: the number of all carriers scheduled before the current scheduled carrier of the currently scheduled carrier and the subframe corresponding to the currently scheduled carrier, and a second sum of the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the currently scheduled carrier in the current feedback window, wherein the information of all scheduled carriers on the subframe corresponding to the currently scheduled carrier is the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, and when the DCI further includes indication information for a/N binding of the currently scheduled carrier and a field for representing the number of scheduled carriers on all scheduled subframes in the current feedback window,

determining the number of the carriers actually scheduled by the base station according to the indication information for A/N binding of the currently scheduled carriers, the total number and the second sum of all the scheduled carriers on the subframe corresponding to the currently scheduled carriers;

and determining the feedback format of the A/N according to the number of the carriers actually scheduled by the base station.

The determining the number of carriers actually scheduled by the base station specifically includes:

detecting whether a second subframe of the missed DCI exists according to the total number and the second sum of all scheduled carriers on a subframe corresponding to the current scheduled carrier and the number of the scheduled carriers on all scheduled subframes in the current feedback window;

and when the second subframe of the missed DCI exists, taking the number of the scheduled carriers on all the scheduled subframes in the current feedback window as the number of the carriers actually scheduled by the base station.

The embodiment of the invention also provides a device for indicating downlink scheduling, which is applied to a terminal and comprises the following components:

a receiving module, configured to receive downlink control information DCI sent by a base station, where the DCI includes information for characterizing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

and the determining module is used for determining the feedback format of the correct transmission indication or the wrong transmission indication A/N according to the DCI.

the determining module comprises:

a first determining unit, configured to determine, according to information of a currently scheduled transmission data block and a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, a number of transmission data blocks actually scheduled by a base station;

and the second determining unit is used for determining the feedback format of the A/N according to the number of the transmission data blocks actually scheduled by the base station.

the determining module comprises:

a third determining unit, configured to determine, according to indication information that a/N binding is not required for a currently scheduled carrier, information of a currently scheduled transmission data block, and a total number of all scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier, a number of transmission data blocks actually scheduled by the base station;

and the fourth determining unit is used for determining the feedback format of the A/N according to the number of the transmission data blocks actually scheduled by the base station.

Wherein the third determining unit includes:

a first subunit, configured to detect whether there is a first subframe of missed DCI according to the total number and the third total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier and the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window, and trigger a second subunit when there is the first subframe of missed DCI;

and the second subunit is used for taking the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window as the number of the transmission data blocks actually scheduled by the base station according to the trigger of the first subunit.

the determining module comprises:

a fifth determining unit, configured to determine, according to the indication information that a/N binding is required to be performed on the currently scheduled carrier, the total number and the second sum of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, the number of carriers actually scheduled by the base station;

and a sixth determining unit, configured to determine an a/N feedback format according to the number of carriers actually scheduled by the base station.

Wherein the fifth determination unit includes:

the third subunit is configured to detect whether there is a second subframe of missed DCI according to the total number and the second sum of all scheduled carriers on the subframe corresponding to the currently scheduled carrier and the number of scheduled carriers on all scheduled subframes in the current feedback window, and trigger the fourth subunit when there is the second subframe of missed DCI;

and the fourth subunit is used for taking the number of the scheduled carriers on all the scheduled subframes in the current feedback window as the number of the carriers actually scheduled by the base station according to the triggering of the third subunit.

The embodiment of the invention also provides a terminal which comprises the device for indicating the downlink scheduling.

The scheme of the invention at least comprises the following beneficial effects:

in the embodiment of the invention, the base station sends DCI including fields for representing the information of the current scheduled carrier and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier to the terminal, so that the base station determines the feedback format of the A/N according to the DCI, the problem that the carrier number and the transmission data block number understood by the terminal and the base station are inconsistent when the base station and the terminal determine the feedback format and the feedback resource based on the number of the dynamically scheduled carriers in order to reduce the feedback overhead is solved, and the effect of reducing the feedback overhead is achieved by ensuring that the carrier number and the transmission data block number understood by the terminal and the base station are consistent when the base station and the terminal determine the feedback format and the feedback resource based on the number of the dynamically scheduled carriers.

Drawings

Fig. 1 is a flowchart of a method for indicating downlink scheduling applied to a base station in a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an apparatus for downlink scheduling indication applied to a base station in a second embodiment of the present invention;

fig. 3 is a flowchart of a method for downlink scheduling indication applied to a terminal in a fourth embodiment of the present invention;

fig. 4 is a schematic structural diagram of an apparatus for downlink scheduling indication applied to a terminal in a fifth embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

First embodiment

As shown in fig. 1, a first embodiment of the present invention provides a method for indicating downlink scheduling, which is applied to a base station, where the method includes:

step S11, when it is monitored that service information needs to be sent to the terminal, generating DCI that needs to be sent to the terminal, wherein the DCI includes information for representing the current scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the current scheduled carrier;

in the first embodiment of the present invention, the base station monitors whether it is necessary to send service information to the terminal, and further determines whether a carrier is scheduled to transmit the service information to the terminal when it is monitored that it is necessary to send the service information to the terminal, and when the carrier is scheduled to transmit the service information to the terminal (i.e., the carrier is a currently scheduled carrier), the base station generates DCI corresponding to the carrier.

In the first embodiment of the present invention, each downlink subframe of FDD has an uplink subframe as its feedback a/N, and TDD needs to determine whether there are a plurality of downlink subframes with a/N fed back in the same uplink subframe according to different timeslot matching conditions. Thus, the specific content included in the DCI in FDD and the specific content included in the DCI in TDD are slightly different. Specifically, when the terminal operates in the frequency division duplex frequency band, the information of the currently scheduled carrier is information of a currently scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier is a total number of all scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier. Further, the information of the currently scheduled transmission data block includes: the first sum of the number of the transmission data blocks on the current scheduled carrier and the number of all the transmission data blocks of the carriers scheduled before the current scheduled carrier (if the carriers are sorted from small to large according to the carrier index, the carriers scheduled before the current scheduled carrier are all the carriers scheduled to be smaller than the current scheduled carrier index), or the number of all the transmission data blocks of the carriers scheduled before the current scheduled carrier. As for the terminal operating in the TDD band, the specific content included in the DCI will be described in detail later.

Step S12, sending DCI to the terminal, so that the terminal determines the feedback format of the correct transmission indication or the incorrect transmission indication according to the DCI.

In the first embodiment of the present invention, it should be noted that after the feedback format of the correct transmission indication or the incorrect transmission indication is determined, the feedback resource can be determined.

In the first embodiment of the present invention, the base station sends, to the terminal, the DCI including the fields of the information for characterizing the currently scheduled carrier and the information of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, so that the base station determines the feedback format of the a/N according to the DCI, thereby solving the problem that the number of carriers understood by the terminal and the base station is inconsistent with the number of transmission data blocks when the base station and the terminal determine the feedback format and the feedback resource based on the number of dynamically scheduled carriers in order to reduce the feedback overhead, and achieving the effect of reducing the feedback overhead by ensuring that the number of carriers understood by the terminal and the base station is consistent with the number of transmission data blocks when the base station and the terminal determine the feedback format and the feedback resource based on the number of dynamically scheduled carriers.

In a first embodiment of the present invention, the step S11 specifically includes: and when judging that the indication information for representing whether the A/N binding of the currently scheduled carrier is needed is not needed to be added in the DCI to be sent to the terminal, adding fields for representing the information of the currently scheduled carrier and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier in the DCI to be sent to the terminal to obtain the DCI.

In the first embodiment of the present invention, when the terminal operates in the frequency division duplex frequency band, the information of the currently scheduled carrier is information of a currently scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier is a total number of all scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier. Further, the information of the currently scheduled transmission data block includes: a first sum of the number of transmission data blocks on the currently scheduled carrier and the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier, or the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier. Correspondingly, when the base station generates the DCI which needs to be sent to the terminal, the base station needs to judge whether indication information for representing whether A/N binding is needed to be carried out on the currently scheduled carrier needs to be added in the DCI which needs to be sent to the terminal, and when the judgment result is that the indication information for representing whether A/N binding is needed to be carried out on the currently scheduled carrier does not need to be added in the DCI which needs to be sent to the terminal, the base station carries out cyclic modular operation on the numerical values corresponding to the first sum and the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, or carries out cyclic modular operation on the numerical values corresponding to the number of all transmission data blocks of the currently scheduled carrier before the currently scheduled carrier and the numerical values corresponding to the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, and adds the result obtained by the cyclic modular operation to the DCI which needs to be sent to the terminal in a binary mode, obtaining DCI to be sent to the terminal.

It should be noted that, when the terminal operates in the frequency division duplex frequency band, and the base station generates the DCI that needs to be sent to the terminal, the base station may not perform the step of determining whether it is necessary to add the indication information for characterizing whether it is necessary to perform the a/N binding on the currently scheduled carrier in the DCI to be sent to the terminal, directly perform the cyclic modulo operation on the numerical value corresponding to the first sum and the numerical value corresponding to the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, or the numerical value corresponding to the number of all transmission data blocks of the carrier that is scheduled before the currently scheduled carrier and the numerical value corresponding to the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, and add the result obtained by the cyclic modulo operation to the DCI to be sent to the terminal in a binary manner, obtaining DCI to be sent to the terminal.

In the first embodiment of the present invention, when the terminal operates in the frequency division duplex frequency band, assuming that the first sum is K _ i, the information added to the DCI to be sent to the terminal is: the DCI _ i { (K _ i-1), N _ index } +1, where DCI _ i is information added to DCI to be sent to a terminal, and represents a first sum, N _ index is a modulus parameter, and the larger the value of the modulus parameter is, the larger the signaling overhead of DCI _ i is, and the specific signaling overhead of DCI _ i is log2(N _ index) bits. When N _ index is 4, the DCI needs to add a 2-bit field to the DCI _ i indication. Similarly, assuming that the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier is K _ total, the information added to the DCI to be sent to the terminal is: DCI _ total { (K _ total-1), N _ total } +1, where DCI _ total is information added to DCI to be sent to a terminal, and represents a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter, where the larger the value of N _ total is, the larger the signaling overhead of DCI _ total is, and the specific signaling overhead of DCI _ total is log2(N _ total) bits. When N _ total is 4, the DCI needs to add a 2-bit field to the DCI _ total indication. It should be noted that the information values obtained by the above calculation (i.e. the numerical values corresponding to DCI _ i and DCI _ total) need to be converted into binary representations and then added to the DCI to be sent to the terminal, so that the signaling overhead can be greatly reduced.

In the first embodiment of the present invention, when the terminal operates in the frequency division duplex frequency band, the process of generating the DCI to be transmitted to the terminal is described with two specific examples.

In the first example, it is assumed that the base station configures 13 carriers for the terminal for aggregation transmission, and it is assumed that N _ index is equal to N _ total and K _ total is equal to 11, then DCI _ i and DCI _ total are as shown in table 1, where it is to be noted that a first column in table 1 represents a carrier index, a second column represents whether the carrier is scheduled, a third column represents the number of transmission data blocks on the carrier, and a fourth column represents the values of DCI _ i and DCI _ total.

TABLE 1

In the second example, it is assumed that the base station configures 13 carriers for the terminal for aggregation transmission, and if N _ index is 4N _ total and K _ total is 11, DCI _ i and DCI _ total are shown in table 2, where it is to be noted that a first column in table 2 represents a carrier index, a second column represents whether the carrier is scheduled, a third column represents the number of transmission data blocks on the carrier, and a fourth column represents the values of DCI _ i and DCI _ total.

TABLE 2

In the first embodiment of the present invention, when the terminal operates in the time division duplex frequency band, and the base station generates DCI that needs to be sent to the terminal, it needs to determine whether to add indication information for indicating whether a/N bonding is required to be performed on a currently scheduled carrier in the DCI to be sent to the terminal, and when it needs to add indication information for indicating whether a/N bonding is required to be performed on a currently scheduled carrier in the DCI to be sent to the terminal, it further determines whether a/N bonding is required to be performed on the currently scheduled carrier.

And when the judgment result shows that the A/N binding of the current scheduled carrier is not needed, adding indication information which does not need the A/N binding of the current scheduled carrier, a field for representing the number of the scheduled transmission data blocks on all the scheduled sub-frames in the current feedback window and a field for representing the information of the current scheduled carrier and the information of all the scheduled carriers on the sub-frame corresponding to the current scheduled carrier in the DCI to be sent to the terminal to obtain the DCI. The information of the current scheduled carrier is the information of the current scheduled transmission data block, and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier. Further, the information of the currently scheduled transmission data block includes: the number of transmission data blocks of the current scheduled carrier, the number of all transmission data blocks of a carrier scheduled before the current scheduled carrier in a subframe corresponding to the current scheduled carrier (if the carriers are sorted from small to large according to carrier indexes, the carrier scheduled before the current scheduled carrier is a carrier smaller than the current scheduled carrier index), and a third sum of the number of all transmission data blocks of all scheduled carriers on a subframe scheduled before the subframe corresponding to the current scheduled carrier in a current feedback window.

In the first embodiment of the present invention, when the terminal operates in the tdd band, assuming that the third sum K _ i, the information added to the DCI is: the DCI _ i { (K _ i-1), N _ index } +1, where DCI _ i is information added to DCI to be sent to a terminal, and represents a third sum, N _ index is a modulus parameter, and the larger the value of the modulus parameter is, the larger the signaling overhead of DCI _ i is, and the specific signaling overhead of DCI _ i is log2(N _ index) bits. When N _ index is 4, the DCI needs to add a 2-bit field to the DCI _ i indication. Similarly, assuming that the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier is K _ total, the information added in the DCI is: DCI _ total { (K _ total-1), N _ total } +1, where DCI _ total is information added to DCI to be sent to a terminal, and represents a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter, where the larger the value of N _ total is, the larger the signaling overhead of DCI _ total is, and the specific signaling overhead of DCI _ total is log2(N _ total) bits. When N _ total is 4, the DCI needs to add a 2-bit field to the DCI _ total indication. Similarly, assuming that the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window is K _ total _ all, the information added in the DCI is: the DCI _ total _ all { (K _ total _ all-1), and N _ total _ all } +1, where DCI _ total _ all is information added to DCI to be sent to a terminal, and represents the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window, and N _ total _ all is a modulus parameter, and the larger the value of DCI _ total _ all is, the larger the signaling overhead of DCI _ total _ all is, and the specific signaling overhead of DCI _ total _ all is log2(N _ total _ all) bits. When N _ total _ all is 4, the DCI needs to add a 2-bit field to the DCI _ total _ all indication. It should be noted that the information values obtained by the above calculation (i.e., the numerical values corresponding to DCI _ i, DCI _ total, and DCI _ total _ all) need to be converted into binary representations and then added to the DCI to be sent to the terminal, so that the signaling overhead can be greatly reduced.

In the first embodiment of the present invention, when the terminal operates in the time division duplex frequency band, the procedure of generating the DCI to be transmitted to the terminal is described with two specific examples.

In the first example, it is assumed that TDD timeslot configuration 2 is adopted, 10 carriers are configured for the terminal in each subframe for aggregate transmission, and 2 transmission data blocks are transmitted for the terminal in each carrier in each subframe, where N _ index is N _ total which is 11 and K _ total which is 10, then a design example of DCI is shown in table 3, and it should be noted that in table 3, values of DCI _ i and DCI _ total are expressed in the form of (DCI _ total, DCI _ i), for example, (10, 2) in table 3, and the like. In addition, the first column in table 3 is a carrier index, and if a value indicating (DCI _ total, DCI _ i) exists in a row corresponding to the index, it indicates that the carrier is a scheduled carrier, and the scheduled carriers in the other table 3 are all fed back in the uplink subframe marked with a slash in table 3.

TABLE 3

In the second example, it is assumed that TDD timeslot configuration 2 is adopted, 10 carriers are configured for the terminal in each subframe for aggregate transmission, and 2 transmission data blocks are transmitted for the terminal in each carrier in each subframe, where N _ index is N _ total which is 4, and K _ total is 10, then a design example of DCI is shown in table 4, and it should be noted that in table 4, values of DCI _ i and DCI _ total are expressed in the form of (DCI _ total, DCI _ i), for example, (2, 2) in table 4, and the like. In addition, the first column in table 4 is a carrier index, and if a value indicating (DCI _ total, DCI _ i) exists in a row corresponding to the index, it indicates that the carrier is a scheduled carrier, and the scheduled carriers in the other table 4 are all fed back in the uplink subframe marked with a slash in table 4.

TABLE 4

In the first embodiment of the present invention, when determining whether the currently scheduled carrier needs to be a/N bonded, the determination result is: when the currently scheduled carrier needs to be A/N bound, adding indication information needing to A/N bind the currently scheduled carrier in DCI to be sent to a terminal, a field for representing the number of the scheduled carriers on all scheduled subframes in a current feedback window, and fields for representing the information of the currently scheduled carrier and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier to obtain the DCI. Wherein the information of the currently scheduled carrier includes: the number of all carriers scheduled before the currently scheduled carrier (i.e., the number of carriers co-scheduled by the sub-frame corresponding to the currently scheduled carrier up to the currently scheduled carrier, including the currently scheduled carrier of course) of the currently scheduled carrier and the sub-frame corresponding to the currently scheduled carrier, and a second sum of the number of all scheduled carriers on the sub-frame scheduled before the sub-frame corresponding to the currently scheduled carrier in the current feedback window. The information of all scheduled carriers on the subframe corresponding to the currently scheduled carrier is the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carrier.

In the first embodiment of the present invention, when the terminal operates in the tdd band, assuming that the second sum is K _ i, the information added to the DCI is: the DCI _ i { (K _ i-1), N _ index } +1, where DCI _ i is information added to DCI to be sent to a terminal, and represents a second sum, N _ index is a modulus parameter, and the larger the value of the modulus parameter is, the larger the signaling overhead of DCI _ i is, and the specific signaling overhead of DCI _ i is log2(N _ index) bits. When N _ index is 4, the DCI needs to add a 2-bit field to the DCI _ i indication. Similarly, assuming that the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carrier is K _ total, the information added in the DCI is: the DCI _ total is information added to DCI to be sent to a terminal, and represents the total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier, where N _ total is a modulus parameter, and the larger the value of N _ total is, the larger the signaling overhead of DCI _ total is, the more the signaling overhead of DCI _ total is log2(N _ total) bits. When N _ total is 4, the DCI needs to add a 2-bit field to the DCI _ total indication. Similarly, assuming that the number of scheduled carriers on all scheduled subframes in the current feedback window is K _ total _ all, the information added in the DCI is: the DCI _ total _ all { (K _ total _ all-1), and N _ total _ all } +1, where DCI _ total _ all is information added to DCI to be sent to a terminal, and represents the number of scheduled carriers on all scheduled subframes in a current feedback window, and N _ total _ all is a modulus parameter, and the larger the value of the modulus parameter is, the larger the signaling overhead of DCI _ total _ all is, and the specific signaling overhead of DCI _ total _ all is log2(N _ total _ all) bits. When N _ total _ all is 4, the DCI needs to add a 2-bit field to the DCI _ total _ all indication. It should be noted that the information values obtained by the above calculation (i.e., the numerical values corresponding to DCI _ i, DCI _ total, and DCI _ total _ all) need to be converted into binary representations and then added to the DCI to be sent to the terminal, so that the signaling overhead can be greatly reduced.

In the first example, it is assumed that TDD timeslot configuration 2 is adopted, 10 carriers are configured for the terminal in each subframe for aggregate transmission, and 2 transmission data blocks are transmitted for the terminal in each carrier in each subframe, where N _ index is N _ total which is 11 and K _ total which is 10, then a design example of DCI is shown in table 5, and it should be noted that in table 5, values of DCI _ i and DCI _ total are expressed in the form of (DCI _ total, DCI _ i), for example, (5, 1) in table 5, and the like. In addition, the first column in table 5 is a carrier index, and if a value indicating (DCI _ total, DCI _ i) exists in a row corresponding to the index, it indicates that the carrier is a scheduled carrier, and the scheduled carriers in table 5 are all fed back in the uplink subframe marked with a slash in table 5.

TABLE 5

In the second example, it is assumed that TDD timeslot configuration 2 is adopted, 10 carriers are configured for the terminal in each subframe for aggregate transmission, and 2 transmission data blocks are transmitted for the terminal in each carrier in each subframe, where N _ index is N _ total is 4 and K _ total is 10, then a design example of DCI is shown in table 6, and it should be noted that in table 6, values of DCI _ i and DCI _ total are expressed in the form of (DCI _ total, DCI _ i), for example, (1, 1) in table 6, and the like. In addition, the first column in table 6 is a carrier index, and if a value indicating (DCI _ total, DCI _ i) exists in a row corresponding to the index, it indicates that the carrier is a scheduled carrier, and the scheduled carriers in table 6 are all fed back in the uplink subframe marked with a slash in table 6.

TABLE 6

Second embodiment

As shown in fig. 2, a second embodiment of the present invention provides an apparatus for indicating downlink scheduling, which is applied to a base station, where the apparatus includes:

a generating module 21, configured to generate DCI which needs to be sent to a terminal, where the DCI includes information used to represent a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

and a sending module 22, configured to send the DCI to the terminal, so that the terminal determines a feedback format of the correct transmission indication or the incorrect transmission indication a/N according to the DCI.

Wherein, the generating module 21 includes:

Wherein the first adding unit includes:

a first calculating subunit, configured to calculate a field for representing the first sum according to a formula DCI _ i ═ mod { (K _ i-1), N _ index } +1, where DCI _ i is the field for representing the first sum, K _ i is the first sum, and N _ index is a modulus parameter;

a second calculating subunit, configured to calculate, by using a formula DCI _ total { (K _ total-1), N _ total } +1, a field for characterizing a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, where DCI _ total is a field for characterizing a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, K _ total is a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter;

and the adding subunit is used for adding the DCI _ i and the DCI _ total to the DCI to be sent to the terminal to obtain the DCI.

Wherein, the device still includes:

Wherein the second adding module comprises:

a first calculating unit, configured to calculate a field for representing a second sum according to a formula DCI _ i ═ mod { (K _ i-1), N _ index } +1, where DCI _ i is the field for representing the second sum, K _ i is the second sum, and N _ index is a modulus parameter;

a second calculating unit, configured to calculate, by using a formula DCI _ total { (K _ total-1), N _ total } +1, a field for characterizing a total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier, where DCI _ total is a field for characterizing a total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier, K _ total is a total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter;

a third calculating unit, configured to calculate, by using a formula DCI _ total _ all { (K _ total _ all-1), N _ total _ all } +1, a field for characterizing the number of scheduled carriers on all scheduled subframes in a current feedback window, where DCI _ total _ all is a field for characterizing the number of scheduled carriers on all scheduled subframes in the current feedback window, K _ total _ all is the number of scheduled carriers on all scheduled subframes in the current feedback window, and N _ total _ all is a modulus parameter;

and the second adding unit is used for adding the indication information, the DCI _ i, the DCI _ total and the DCI _ total _ all which need to perform A/N binding on the current scheduled carrier into the DCI to be sent to the terminal to obtain the DCI.

Wherein, the first increase module includes:

a fourth calculating unit, configured to calculate a field for representing a third sum according to a formula DCI _ i ═ mod { (K _ i-1), N _ index } +1, where DCI _ i is the field for representing the third sum, K _ i is the third sum, and N _ index is a modulus parameter;

a fifth calculating unit, configured to calculate, by using a formula DCI _ total { (K _ total-1), N _ total } +1, a field for characterizing a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, where DCI _ total is a field for characterizing a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, K _ total is a total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier, and N _ total is a modulus parameter;

a sixth calculating unit, configured to calculate, by using formulas DCI _ total _ all { (K _ total _ all-1), N _ total _ all } +1, a field for characterizing the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window, where DCI _ total _ all is a field for characterizing the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window, K _ total _ all is the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window, and N _ total _ all is a modulus parameter;

and a third adding unit, configured to add indication information, DCI _ i, DCI _ total, and DCI _ total _ all, which do not need to perform a/N binding on a currently scheduled carrier, to DCI to be sent to a terminal, so as to obtain DCI.

In the second embodiment of the present invention, the base station sends, to the terminal, the DCI including the fields of the information for characterizing the currently scheduled carrier and the information of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, so that the base station determines the feedback format of the a/N according to the DCI, which solves the problem that the number of carriers understood by the terminal and the base station is inconsistent with the number of transmission data blocks when the base station and the terminal determine the feedback format and the feedback resource based on the number of dynamically scheduled carriers in order to reduce the feedback overhead, and achieves the effect of reducing the feedback overhead by ensuring that the number of carriers understood by the terminal and the base station is consistent with the number of transmission data blocks when the base station and the terminal determine the feedback format and the feedback resource based on the number of dynamically scheduled carriers.

It should be noted that the apparatus for indicating downlink scheduling applied to a base station according to the second embodiment of the present invention is an apparatus for applying the above method for indicating downlink scheduling applied to a base station, that is, all embodiments of the above method are applicable to the apparatus, and can achieve the same or similar beneficial effects.

Third embodiment

A third embodiment of the present invention provides a base station, including the above apparatus for indicating downlink scheduling applied to the base station.

It should be noted that the base station provided in the third embodiment of the present invention is a base station including the apparatus for downlink scheduling indication applied to the base station, that is, all embodiments of the apparatus for downlink scheduling indication applied to the base station are applicable to the terminal, and all the same or similar beneficial effects can be achieved.

Fourth embodiment

As shown in fig. 3, a fourth embodiment of the present invention provides a method for indicating downlink scheduling, which is applied to a terminal, where the method includes:

step S31, receiving DCI sent by the base station, wherein the DCI includes information for representing the current scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the current scheduled carrier;

step S32, determining a feedback format of the correct transmission indication or the incorrect transmission indication according to the DCI.

In the fourth embodiment of the present invention, it should be noted that after the feedback format of the correct transmission indication or the incorrect transmission indication is determined, the feedback resource can be determined.

In the fourth embodiment of the present invention, after receiving DCI including information characterizing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, a terminal determines a feedback format of a correct transmission indication or an incorrect transmission indication according to the fields, which solves the problem that the carrier number and the transmission data block number understood by the terminal and the base station are inconsistent when the base station and the terminal determine the feedback format and the feedback resource based on the dynamically scheduled carrier number in order to reduce the feedback overhead, and achieves the effect of reducing the feedback overhead by ensuring that the carrier number and the transmission data block number understood by the terminal and the base station are consistent when the base station and the terminal determine the feedback format and the feedback resource based on the dynamically scheduled carrier number.

In a fourth embodiment of the present invention, when the terminal operates in the FDD frequency band, the specific contents of the fields in the received DCI are as follows: the information of the current scheduled carrier is the information of the current scheduled transmission data block, and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier. Accordingly, the step S32 is: and determining the number of the transmission data blocks actually scheduled by the base station according to the information of the transmission data blocks currently scheduled and the total number of all the scheduled transmission data blocks on the subframe corresponding to the carrier currently scheduled, and then determining the feedback format of the A/N according to the number of the transmission data blocks actually scheduled by the base station.

It should be noted that, when the terminal operates in the FDD frequency band, the information of the currently scheduled transmission data block specifically includes: a first sum of the number of transmission data blocks on the currently scheduled carrier and the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier, or the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier.

In a fourth embodiment of the present invention, when the terminal operates in the TDD band, specific contents of fields in the received DCI are as follows: the information of the current scheduled carrier is the information of the current scheduled transmission data block, and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier. And when the DCI further includes indication information that a/N bonding is not required for the currently scheduled carrier and a field for characterizing the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window, step S32 is: and determining the number of the transmission data blocks actually scheduled by the base station according to the indication information which does not need to perform A/N binding on the currently scheduled carrier, the information of the currently scheduled transmission data blocks and the total number of all the scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, and then determining the feedback format of the A/N according to the number of the transmission data blocks actually scheduled by the base station.

It should be noted that, when the terminal operates in the TDD frequency band and the DCI includes indication information that does not need to perform a/N binding on the currently scheduled carrier, the information of the currently scheduled transmission data block specifically includes: the number of transmission data blocks of the currently scheduled carrier, the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier in the subframe corresponding to the currently scheduled carrier, and a third sum of the number of all transmission data blocks of all scheduled carriers in the current feedback window on the subframe scheduled before the subframe corresponding to the currently scheduled carrier. Thus, the terminal can detect whether the first subframe of the missed DCI exists according to the total number and the third sum of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier and the number of the scheduled transmission data blocks on all scheduled subframes in the current feedback window, and when the first subframe of the missed DCI exists, directly take the number of the scheduled transmission data blocks on all scheduled subframes in the current feedback window as the number of the transmission data blocks actually scheduled by the base station. Therefore, the situation that the number of the transmission data blocks actually scheduled by the base station cannot be determined due to the fact that the terminal misses the DCI of the first subframe is effectively avoided.

In a fourth embodiment of the present invention, when the terminal operates in the TDD band, specific contents of fields in the received DCI are as follows: the information of the currently scheduled carrier includes: the number of all carriers scheduled before the current scheduled carrier of the current scheduled carrier and the subframe corresponding to the current scheduled carrier is a second sum of the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the current scheduled carrier in the current feedback window, and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier is the total number of all scheduled carriers on the subframe corresponding to the current scheduled carrier. And when the DCI further includes indication information that needs to perform a/N bonding on the currently scheduled carrier and a field for characterizing the number of scheduled carriers on all scheduled subframes in the current feedback window, step S32 is: determining the number of the carriers actually scheduled by the base station according to the indication information for A/N binding of the currently scheduled carriers, the total number and the second sum of all the scheduled carriers on the subframe corresponding to the currently scheduled carriers; and determining the feedback format of the A/N according to the number of the carriers actually scheduled by the base station.

It should be noted that, in the fourth embodiment of the present invention, when the terminal operates in the TDD frequency band and the DCI includes indication information that the a/N binding needs to be performed on the currently scheduled carrier, the terminal may detect whether there is a second subframe of missed DCI according to the total number and the second sum of all scheduled carriers on the subframe corresponding to the currently scheduled carrier and the number of scheduled carriers on all scheduled subframes in the current feedback window, and when there is the second subframe of missed DCI, use the number of scheduled carriers on all scheduled subframes in the current feedback window as the number of carriers actually scheduled by the base station. Therefore, the situation that the number of the carrier waves actually scheduled by the base station cannot be determined due to the fact that the terminal misses the DCI of the second subframe is effectively avoided.

Fifth embodiment

As shown in fig. 4, a fifth embodiment of the present invention provides an apparatus for indicating downlink scheduling, which is applied to a terminal, and the apparatus includes:

a receiving module 41, configured to receive downlink control information DCI sent by a base station, where the DCI includes information used to represent a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

and a determining module 42, configured to determine a feedback format of the correct transmission indication or the erroneous transmission indication a/N according to the DCI.

the determination module 42 includes:

Wherein the third determining unit includes:

the determination module 42 includes:

Wherein the fifth determination unit includes:

In the fifth embodiment of the present invention, after receiving DCI including information characterizing a currently scheduled carrier and fields of information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, a terminal determines a feedback format of a correct transmission indication or an incorrect transmission indication according to the fields, which solves the problem that the carrier number and the transmission data block number understood by the terminal and the base station are inconsistent when the base station and the terminal determine the feedback format and the feedback resource based on the dynamically scheduled carrier number in order to reduce the feedback overhead, and achieves the effect of reducing the feedback overhead by ensuring that the carrier number and the transmission data block number understood by the terminal and the base station are consistent when the base station and the terminal determine the feedback format and the feedback resource based on the dynamically scheduled carrier number.

It should be noted that, the apparatus for downlink scheduling indication applied to a terminal according to the fifth embodiment of the present invention is an apparatus for applying the above method for downlink scheduling indication applied to a terminal, that is, all embodiments of the above method are applicable to the apparatus, and can achieve the same or similar beneficial effects.

Sixth embodiment

A sixth embodiment of the present invention provides a terminal, including the above apparatus for downlink scheduling indication applied to the terminal.

It should be noted that, the terminal provided in the sixth embodiment of the present invention is a terminal including the apparatus for downlink scheduling indication applied to the terminal, that is, all embodiments of the apparatus for downlink scheduling indication applied to the terminal are applicable to the terminal, and can achieve the same or similar beneficial effects.

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. A method for indicating downlink scheduling is applied to a base station, and is characterized in that the method comprises the following steps:

generating downlink control information DCI which needs to be sent to a terminal, comprising: judging whether indication information for representing whether correct transmission indication or error transmission indication A/N binding needs to be carried out on the current scheduled carrier or not needs to be added in DCI to be sent to a terminal;

when judging that indication information for representing whether A/N binding needs to be carried out on the current scheduled carrier wave is not required to be added in the DCI to be sent to the terminal, the terminal works in a frequency division duplex frequency range, and the following steps are added in the DCI to be sent to the terminal: a field used for representing the information of the first current scheduled carrier and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier to obtain the DCI;

the information of the first currently scheduled carrier is information of a first currently scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier; the information of the first currently scheduled transmission data block comprises: a first sum of a number of transmission data blocks on a currently scheduled carrier and a number of all transmission data blocks of a carrier scheduled before the currently scheduled carrier;

calculating a field DCI for representing a first sum by a formula DCI _ i ═ mod { (K _ i-1), N _ index } +1, wherein K _ i is the first sum, and N _ index is a modulus parameter;

calculating a field DCI _ total used for representing the total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier by using a formula DCI _ total { (K _ total-1), N _ total } +1, wherein K _ total is the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, and N _ total is a modulus parameter;

adding the DCI _ i and the DCI _ total into DCI to be sent to a terminal to obtain the DCI;

and sending the downlink control information DCI to a terminal.

2. The method of claim 1, wherein when it is determined that indication information for characterizing whether a/N bonding needs to be performed on a currently scheduled carrier needs to be added to DCI to be sent to a terminal, if the terminal operates in a tdd band, it is further determined whether a/N bonding needs to be performed on the currently scheduled carrier;

when A/N binding of the current scheduled carrier is not needed, the DCI to be sent to the terminal is added with: indication information which does not need to perform A/N binding on the current scheduled carrier, a field for representing the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window, and a field for representing information of a third current scheduled carrier and information of all the scheduled carriers on the subframe corresponding to the current scheduled carrier, so as to obtain the DCI;

wherein the information of the third currently scheduled carrier is information of a third currently scheduled transmission data block; the information of the third currently scheduled transmission data block includes: a third sum of the number of transmission data blocks of the currently scheduled carrier, the number of all transmission data blocks of the currently scheduled carrier, which are scheduled before the currently scheduled carrier, of the subframe corresponding to the currently scheduled carrier, and the number of all transmission data blocks of all scheduled carriers, which are scheduled before the subframe corresponding to the currently scheduled carrier in the current feedback window, of the subframe;

and sending the downlink control information DCI to a terminal.

3. The method of claim 2, further comprising:

when A/N binding needs to be carried out on the current scheduled carrier, the DCI to be sent to the terminal is added with: indication information needing to perform A/N binding on the currently scheduled carrier, a field for representing the number of the scheduled carriers on all the scheduled subframes in the current feedback window, a field for representing information of a second currently scheduled carrier and information of all the scheduled carriers on the subframe corresponding to the currently scheduled carrier, and obtaining the DCI;

wherein the information of the second currently scheduled carrier includes: a second sum of the number of all carriers scheduled before the current scheduled carrier of the currently scheduled carrier and the subframe corresponding to the currently scheduled carrier and the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the currently scheduled carrier in the current feedback window;

and sending the downlink control information DCI to a terminal.

4. The method of claim 3, wherein when a/N bonding is required for a currently scheduled carrier, adding to DCI to be transmitted to a terminal: the obtaining of the DCI includes indication information that a/N bonding needs to be performed on a currently scheduled carrier, a field used for representing the number of scheduled carriers on all scheduled subframes in a current feedback window, a field used for representing information of a second currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, and specifically includes:

calculating a field DCI for representing the second sum by using a formula DCI _ i { (K _ i-1), N _ index } +1, wherein K _ i is the second sum, and N _ index is a modulus parameter;

calculating a field DCI _ total used for representing the total number of all scheduled carriers on a subframe corresponding to a currently scheduled carrier by using a formula DCI _ total { (K _ total-1), N _ total } +1, wherein K _ total is the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, and N _ total is a modulus parameter;

calculating a field DCI _ total _ all used for representing the number of scheduled carriers on all scheduled subframes in a current feedback window by a formula DCI _ total _ all { (K _ total _ all-1), N _ total _ all } +1, wherein K _ total _ all is the number of scheduled carriers on all scheduled subframes in the current feedback window, and N _ total _ all is a modulus parameter;

and adding the indication information, the DCI _ i, the DCI _ total and the DCI _ total _ all, which need to perform A/N binding on the currently scheduled carrier, into DCI to be sent to a terminal to obtain the DCI.

5. The method of claim 2, wherein when a/N bonding is not required for a currently scheduled carrier, adding to DCI to be transmitted to a terminal: the obtaining of the DCI includes that indication information that a/N binding is not required for a currently scheduled carrier, a field used for representing the number of scheduled transmission data blocks on all scheduled subframes in a current feedback window, and a field used for representing information of a third currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier, and specifically includes:

calculating a field DCI for representing the third sum by using a formula DCI _ i { (K _ i-1), N _ index } +1, wherein K _ i is the third sum, and N _ index is a modulus parameter;

calculating a field DCI _ total _ all used for representing the number of the scheduled transmission data blocks on all scheduled subframes in the current feedback window through a formula DCI _ total _ all { (K _ total _ all-1) and N _ total _ all } +1, wherein K _ total _ all is the number of the scheduled transmission data blocks on all scheduled subframes in the current feedback window, and N _ total _ all is a modulus parameter;

and adding the indication information which does not need to carry out A/N binding on the currently scheduled carrier, the DCI _ i, the DCI _ total and the DCI _ total _ all into DCI to be sent to a terminal to obtain the DCI.

6. An apparatus for indicating downlink scheduling, applied to a base station, the apparatus comprising:

a generating module, configured to generate DCI which needs to be sent to a terminal;

the generation module comprises:

a determining unit, configured to determine whether indication information for indicating whether correct transmission indication or incorrect transmission indication a/N binding needs to be performed on a currently scheduled carrier in DCI to be sent to a terminal needs to be added, and trigger a first adding unit when the terminal operates in a frequency division duplex frequency band and does not need to add indication information for indicating whether a/N binding needs to be performed on the currently scheduled carrier in the DCI to be sent to the terminal;

a first adding unit, configured to add, according to the trigger of the determining unit, to the DCI to be sent to the terminal: a field used for representing the information of the first current scheduled carrier and the information of all scheduled carriers on the subframe corresponding to the current scheduled carrier to obtain the DCI;

the information of the first current scheduled carrier is the information of a first current scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the current scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier; the information of the first currently scheduled transmission data block includes: a first sum of a number of transmission data blocks on a currently scheduled carrier and a number of all transmission data blocks of a carrier scheduled before the currently scheduled carrier;

obtaining a field DCI for representing the first sum by calculating a formula DCI _ i ═ mod { (K _ i-1) and N _ index } +1, wherein K _ i is the first sum and N _ index is a modulus parameter; calculating a field DCI _ total used for representing the total number of all scheduled transmission data blocks on a subframe corresponding to a currently scheduled carrier by using a formula DCI _ total { (K _ total-1), N _ total } +1, wherein K _ total is the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, and N _ total is a modulus parameter;

and the sending module is used for sending the DCI to the terminal.

7. The apparatus of claim 6, wherein the apparatus further comprises:

a judging module, configured to, when the judging unit judges that indication information for indicating whether a currently scheduled carrier needs to be a/N bonded needs to be added to DCI to be sent to a terminal, and the terminal operates in a time division duplex frequency band, further judge whether a/N bonding needs to be performed on the currently scheduled carrier, and trigger a first adding module when a/N bonding does not need to be performed on the currently scheduled carrier;

a first adding module, configured to add, according to the trigger of the determining module, to the DCI to be sent to the terminal: indication information which does not need to perform A/N binding on the current scheduled carrier, a field for representing the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window, and a field for representing information of a third current scheduled carrier and information of all the scheduled carriers on the subframe corresponding to the current scheduled carrier, so as to obtain the DCI;

the information of the third currently scheduled carrier is information of a third currently scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier; the information of the third currently scheduled transmission data block includes: the number of transmission data blocks of the currently scheduled carrier, the number of all transmission data blocks of the carrier scheduled before the currently scheduled carrier in the subframe corresponding to the currently scheduled carrier, and a third sum of the number of all transmission data blocks of all scheduled carriers in the current feedback window on the subframe scheduled before the subframe corresponding to the currently scheduled carrier.

8. The apparatus of claim 7, wherein the apparatus further comprises:

a second adding module, configured to, when the determining module determines that a/N bonding needs to be performed on a currently scheduled carrier, add, to DCI to be sent to a terminal: indication information needing to perform A/N binding on the currently scheduled carrier, a field used for representing the number of the scheduled carriers on all the scheduled subframes in the current feedback window, and a field used for representing information of a second currently scheduled carrier and information of all the scheduled carriers on the subframe corresponding to the currently scheduled carrier, so as to obtain the DCI;

wherein the information of the second currently scheduled carrier includes: the number of all carriers scheduled before the current scheduled carrier of the current scheduled carrier and the subframe corresponding to the current scheduled carrier is a second sum of the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the current scheduled carrier in the current feedback window.

9. A base station, characterized by comprising means for downlink scheduling indication according to any one of claims 6 to 8.

10. A method for indicating downlink scheduling is applied to a terminal, and is characterized in that the method comprises the following steps:

receiving downlink control information DCI sent by a base station; wherein

Judging whether indication information for representing whether correct transmission indication or error transmission indication A/N binding needs to be carried out on the current scheduled carrier or not needs to be added in DCI to be sent to a terminal by a base station;

when the base station judges that indication information for representing whether A/N binding needs to be carried out on the currently scheduled carrier or not does not need to be added in the DCI to be sent to the terminal, the terminal works in a frequency division duplex frequency band, and fields for representing the information of the first currently scheduled carrier and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier are added in the DCI to be sent to the terminal, so that the DCI is obtained;

the information of the first currently scheduled carrier is information of a first currently scheduled transmission data block, and the information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier is the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier; the information of the first currently scheduled transmission data block includes: a first sum of a number of transmission data blocks on a currently scheduled carrier and a number of all transmission data blocks of a carrier scheduled before the currently scheduled carrier, wherein

Calculating a field DCI for representing the first sum by using a formula DCI _ i { (K _ i-1), N _ index } +1, wherein K _ i is the first sum, and N _ index is a modulus parameter;

adding the DCI _ i and the DCI _ total to DCI to be sent to a terminal by a base station to obtain the DCI;

and the terminal determines the feedback format of the correct transmission indication or the wrong transmission indication A/N according to the DCI.

11. The method of claim 10, wherein when the base station determines that indication information for indicating whether A/N binding is required for a currently scheduled carrier does not need to be added to DCI to be transmitted to the terminal, the terminal operates in a frequency division duplex frequency band, and accordingly,

the determining, according to the DCI, a feedback format of a correct transmission indicator or an incorrect transmission indicator a/N specifically includes:

determining the number of the transmission data blocks actually scheduled by the base station according to the information of the first currently scheduled transmission data block and the total number of all the scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier;

12. The method of claim 10, wherein when the DCI includes indication information indicating whether a/N bonding for a currently scheduled carrier is required to be added to the DCI to be sent to a terminal, the terminal operates in a time division duplex frequency band and determines that the a/N bonding for the currently scheduled carrier is not required; the DCI received by the terminal comprises: indication information which does not need to carry out A/N binding on the current scheduled carrier, a field used for representing the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window, and a field used for representing the information of a third current scheduled carrier and the information of all the scheduled carriers on the subframe corresponding to the current scheduled carrier;

determining the number of transmission data blocks actually scheduled by the base station according to the indication information which does not need to perform A/N binding on the currently scheduled carrier, the information of the third currently scheduled carrier and the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier;

13. The method of claim 12, wherein the information of a third currently scheduled carrier is information of a third currently scheduled transmission data block, the information of the third currently scheduled transmission data block comprising:

14. The method of claim 13, wherein the determining the number of transmission data blocks actually scheduled by the base station specifically comprises:

detecting whether a first subframe of the missed DCI exists according to the total number of all scheduled transmission data blocks on the subframe corresponding to the current scheduled carrier, the third sum and the number of the scheduled transmission data blocks on all scheduled subframes in the current feedback window;

15. The method of claim 10, wherein when the DCI includes indication information indicating whether a/N bonding for a currently scheduled carrier is required to be added to the DCI to be sent to a terminal, the terminal operates in a time division duplex frequency band and determines that the a/N bonding for the currently scheduled carrier is required;

the DCI received by the terminal comprises: indication information needing to perform A/N binding on the currently scheduled carrier, a field used for representing the number of the scheduled carriers on all scheduled subframes in a current feedback window, and a field used for representing information of a second currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

the information of the second currently scheduled carrier includes: a second sum of the number of all carriers scheduled before the current scheduled carrier of the currently scheduled carrier and the subframe corresponding to the currently scheduled carrier and the number of all scheduled carriers on the subframe scheduled before the subframe corresponding to the currently scheduled carrier in the current feedback window;

determining the number of the carriers actually scheduled by the base station according to the indication information of A/N binding of the currently scheduled carriers, the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carriers and the second sum;

16. The method of claim 15, wherein the determining the number of carriers actually scheduled by the base station specifically comprises:

detecting whether a second subframe with missed DCI detection exists according to the total number of all scheduled carriers on the subframe corresponding to the current scheduled carrier, the second sum and the number of the scheduled carriers on all scheduled subframes in the current feedback window;

17. An apparatus for indicating downlink scheduling, applied to a terminal, the apparatus comprising:

a receiving module, configured to receive downlink control information DCI sent by a base station;

the method comprises the steps that a base station judges whether indication information used for representing whether correct transmission indication or error transmission indication A/N binding needs to be carried out on a currently scheduled carrier or not needs to be added in DCI to be sent to a terminal, when the base station judges that the indication information used for representing whether the A/N binding needs to be carried out on the currently scheduled carrier or not does not need to be added in the DCI to be sent to the terminal, the terminal works in a frequency division duplex frequency range, and fields used for representing information of a first currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier are added in the DCI to be sent to the terminal, so that the DCI is obtained;

18. The apparatus of claim 17, wherein when the base station determines that indication information for indicating whether A/N binding is required for a currently scheduled carrier does not need to be added to DCI to be sent to the terminal, the terminal operates in a frequency division duplex frequency band, and accordingly,

the determining module comprises:

a first determining unit, configured to determine, according to the information of the first currently scheduled transmission data block and a total number of all scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier, a number of transmission data blocks actually scheduled by a base station;

19. The apparatus of claim 17, wherein when the DCI includes indication information indicating whether a/N bonding for a currently scheduled carrier is required to be added to the DCI to be sent to a terminal, the terminal operates in a time division duplex frequency band, and it is determined that the a/N bonding for the currently scheduled carrier is not required, the DCI received by the terminal includes: indication information which does not need to carry out A/N binding on the current scheduled carrier, a field used for representing the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window, and a field used for representing the information of a third current scheduled carrier and the information of all the scheduled carriers on the subframe corresponding to the current scheduled carrier;

the determining module comprises:

a third determining unit, configured to determine, according to the indication information that a/N binding does not need to be performed on the currently scheduled carrier, information of a third currently scheduled carrier, and a total number of all scheduled transmission data blocks on a subframe corresponding to the currently scheduled carrier, a number of transmission data blocks actually scheduled by the base station;

20. The apparatus of claim 19, wherein the information of a third currently scheduled carrier is information of a third currently scheduled transmission data block, the information of the third currently scheduled transmission data block comprising:

21. The apparatus of claim 20, wherein the third determining unit comprises:

a first subunit, configured to detect whether there is a first subframe of missed DCI according to the total number of all scheduled transmission data blocks on the subframe corresponding to the currently scheduled carrier, the third sum, and the number of scheduled transmission data blocks on all scheduled subframes in the current feedback window, and trigger a second subunit when there is the first subframe of missed DCI;

and the second subunit is configured to use, according to the trigger of the first subunit, the number of the scheduled transmission data blocks on all the scheduled subframes in the current feedback window as the number of the transmission data blocks actually scheduled by the base station.

22. The apparatus of claim 17, wherein when the DCI includes indication information indicating whether a/N bonding for a currently scheduled carrier is required to be added to the DCI to be sent to a terminal, the terminal operates in a time division duplex frequency band and determines that the a/N bonding for the currently scheduled carrier is required; the DCI received by the terminal comprises: indication information needing to perform A/N binding on the currently scheduled carrier, a field used for representing the number of the scheduled carriers on all scheduled subframes in a current feedback window, and a field used for representing information of a second currently scheduled carrier and information of all scheduled carriers on a subframe corresponding to the currently scheduled carrier;

the determining module comprises:

a fifth determining unit, configured to determine, according to the indication information that the currently scheduled carrier needs to be a/N bonded, the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, and the second sum, the number of carriers actually scheduled by the base station;

23. The apparatus of claim 22, wherein the fifth determining unit comprises:

a third subunit, configured to detect whether there is a second subframe of missed DCI according to the total number of all scheduled carriers on the subframe corresponding to the currently scheduled carrier, the second sum, and the number of scheduled carriers on all scheduled subframes in the current feedback window, and trigger a fourth subunit when there is a second subframe of missed DCI;

and the fourth subunit is configured to use, according to the trigger of the third subunit, the number of scheduled carriers on all scheduled subframes in the current feedback window as the number of carriers actually scheduled by the base station.

24. A terminal, characterized in that it comprises means for downlink scheduling indication according to any of claims 17-23.