CN107733584B

CN107733584B - ACK/NACK feedback information transmission method and related equipment

Info

Publication number: CN107733584B
Application number: CN201610666325.2A
Authority: CN
Inventors: 高雪娟; 司倩倩; 潘学明
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2020-04-10
Anticipated expiration: 2036-08-12
Also published as: WO2018028337A1; CN107733584A

Abstract

The invention discloses an ACK/NACK feedback information transmission method and related equipment, which are used for solving the problems that in the existing mechanism, the understanding of a terminal and a base station on ACK/NACK feedback bit numbers is inconsistent, and the correct analysis of ACK/NACK cannot be ensured. The method comprises the following steps: the terminal determines ACK/NACK indication information, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal; and the terminal reports the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information.

Description

ACK/NACK feedback information transmission method and related equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and a related device for transmitting ACK/NACK feedback information.

Background

One, existing LTE frame structure (LTE Rel-8/9/10/11/12/13)

An existing Long Term Evolution (LTE) Frequency Division Duplex (FDD) system uses a Frame Structure Type 1 (FS 1 for short) Frame Structure Type 1. In an FDD system, uplink and downlink transmissions use different carrier frequencies, and uplink and downlink transmissions use the same frame structure. As shown in fig. 1, which is a structural diagram of FS1, on each carrier, a radio frame with a length of 10ms includes 10 subframes with a length of 1ms, each subframe is divided into two time slots with a length of 0.5ms, and a Transmission Time Interval (TTI) for uplink and downlink data Transmission is 1 ms.

The existing LTE Time Division Duplex (TDD) system uses a frame structure Type 2 (FS 2 for short) frame structure Type 2. In a TDD system, uplink and downlink transmissions use different subframes or different time slots on the same frequency. Fig. 2 shows a structural diagram of FS 2. Each 10ms long radio frame in FS2 consists of two 5ms long half-frames, each containing 5 1ms long subframes. The subframes in FS2 are divided into three categories, which are: the subframe comprises a Downlink subframe, an Uplink subframe and special subframes, wherein each special subframe comprises a Downlink transmission Time Slot (DwPTS), a Guard Period (GP) and an Uplink transmission Time Slot (UpPTS). The DwPTS can be used for transmitting downlink pilot frequency, downlink service data and downlink control signaling; the GP does not transmit any signal; the UpPTS may be used only for transmitting a random access signal and a Sounding Reference Signal (SRS), and may not be used for transmitting uplink traffic or uplink control information. Each half frame comprises at least 1 downlink subframe, at least 1 uplink subframe and at most 1 special subframe. Table 1 shows 7 uplink and downlink subframe configurations supported in FS 2.

Table 1: uplink and downlink configuration

Second, ACK/NACK feedback timing sequence of existing LTE FDD/TDD

In the LTE Rel-8 system, for the FDD system, since each subframe has uplink resources, ACK/NACK feedback information of a downlink subframe numbered n is transmitted in an uplink subframe numbered n + k.

For the TDD system, since uplink and downlink transmissions share frequency domain resources, the uplink and downlink subframes need to be divided as shown in table 1, so ACK/NACK feedback information of different downlink subframes may need to be transmitted in the same uplink subframe, as shown in table 2, according to a set K corresponding to an uplink subframe numbered n: { k } is a function of₀,k₁,…k_M-1Each element in the set can determine a downlink subframe (including a downlink subframe numbered n-K, including a special subframe) which needs to perform ACK/NACK feedback in the uplink subframe, and then the same uplink subframe needs to feed back ACK/NACK feedback information of M downlink subframes, where M is the number of elements in the set K, and different uplink subframes and different TDD uplink and downlink configuration values are not necessarily the same.

TABLE 2Downlink association set index K: { K₀,k₁,…k_M-1}for TDD

It should be noted that the numbers in table 2 are in units of radio frames, and a subframe with a number of n-k indicates that the subframe belongs to a previous radio frame if the subframe number n-k is less than zero.

When Carrier aggregation is performed, one terminal may simultaneously operate on multiple carriers, but only transmit ACK/NACK feedback information, such as Primary Component Carrier (PCC), in a Physical Uplink Control Channel (PUCCH) of a partial Carrier. Therefore, the terminal needs to feed back ACK/NACK feedback information corresponding to multiple carriers in one uplink subframe. When the carriers aggregated by the terminal are all FDD carriers, the ACK/NACK feedback time sequence on each carrier is performed according to n + 4. When the carriers aggregated by the terminal are TDD carriers, if the TDD uplink and downlink configurations of all the TDD carriers are the same, the ACK/NACK feedback timing sequence on each carrier is performed according to the feedback timing sequence shown in table 2 corresponding to the TDD uplink and downlink configurations; if the TDD uplink and downlink configurations of the aggregated TDD carriers are different, reference TDD uplink and downlink configurations need to be defined for Secondary Component Carriers (SCCs) according to a specific rule, and ACK/NACK feedback is performed according to a feedback timing sequence in table 2 corresponding to the reference TDD uplink and downlink configurations. When the Carrier aggregated by the terminal includes both an FDD Carrier and a TDD Carrier, if the FDD Carrier is a PCC, the ACK/NACK feedback timing on each Carrier is performed according to n +4, and if the TDD Carrier is a PCC, the Secondary Component Carrier (SCC) is defined with reference to TDD uplink and downlink configurations according to a specific rule, and ACK/NACK feedback is performed according to the feedback timing in table 2 corresponding to the reference TDD uplink and downlink configurations.

In subsequent releases (releases), it is further supported that the aggregated carriers are divided into multiple carrier groups, and ACK/NACK feedback is performed on one carrier in each carrier group through a PUCCH, and at this time, the feedback timing of the SCC in the carrier group is determined in each carrier group according to one of the above situations corresponding to its aggregated carrier.

When each carrier aggregated by the terminal adopts FDD feedback time sequence, the bit number of ACK/NACK feedback information transmitted in the same uplink subframe is determined according to the number of configured carriers, the transmission mode of each carrier and whether space combination is adopted, namely the bit number of ACK/NACK is determined

When the carrier i is in a single TB transmission mode or a multi-TB transmission mode and spatial combination is adopted, C_iOtherwise, i.e. when carrier i is multi-TB transmission mode and spatial combining is not employed, C _i2. When at least one carrier aggregated by the terminal adopts a TDD feedback time sequence, the bit number of ACK/NACK feedback information transmitted in the same uplink subframe is determined according to the number of configured carriers, the M value, the transmission mode of each carrier and whether spatial combination is adopted, namely the bit number of ACK/NACK is determined

When the carrier i is in a single TB transmission mode or a multi-TB transmission mode and spatial combination is adopted, C_iOtherwise, i.e. when carrier i is multi-TB transmission mode and spatial combining is not employed, C_i＝2，M_iAnd the number of downlink sub-frames corresponding to the carrier i and needing ACK/NACK feedback in the same uplink sub-frame is determined.

In an LTE system, existing channel transmissions are all defined by TTI being 1ms, when a TTI length other than 1ms is adopted, the TTI length of downlink transmission may change, and in addition, a base station may dynamically adjust feedback delay of ACK/NACK transmission by a terminal, so that the number of downlink transmissions for ACK/NACK feedback in the same uplink TTI may dynamically change along with different TTI lengths and different delays indicated by the base station, and thus there is no feedback window of a fixed size, that is, there is no fixed M value. The method for determining the number of ACK/NACK feedback bits according to the configuration carrier, the transmission mode and the M size in the existing mechanism is not applicable any more, and a new method needs to be researched to ensure that the number of ACK/NACK feedback bits is consistent to the comprehension of the terminal and the base station, so that the correct analysis of ACK/NACK is ensured, and downlink retransmission is avoided as much as possible.

Disclosure of Invention

The embodiment of the invention provides an ACK/NACK feedback information transmission method and related equipment, which are used for solving the problems that in the existing mechanism, the understanding of ACK/NACK feedback bit numbers by a terminal and a base station is inconsistent, and the correct analysis of ACK/NACK cannot be ensured.

The embodiment of the invention provides the following specific technical scheme:

in a first aspect, an embodiment of the present invention provides a method for transmitting ACK/NACK feedback information, including:

the terminal determines ACK/NACK indication information, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal;

and the terminal reports the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information.

In a possible implementation, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same transmission time interval TTI; or, the ACK/NACK indication information is transmitted in a transmission time interval TTI ahead of the ACK/NACK feedback information.

In a possible implementation, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel or different channels.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information occupy different time domain and frequency domain resources on the same channel to be independently transmitted.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the reporting, by the terminal, of the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information includes:

the terminal determines a first channel resource for transmitting the ACK/NACK indication information, and transmits the ACK/NACK indication information on the first channel resource;

and the terminal determines a second channel resource for transmitting the ACK/NACK feedback information and transmits the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In a possible implementation manner, a channel format for transmitting the ACK/NACK indication information is the same as or different from a channel format for transmitting the ACK/NACK feedback information.

In a possible implementation manner, the determining, by the terminal, a first channel resource for transmitting the ACK/NACK indication information includes:

the terminal acquires the first channel resource pre-configured by a network side through a high-level signaling; or, the terminal acquires a first channel resource set pre-configured by a network side through a high-level signaling, and determines at least one first channel resource in the first channel resource set according to a bit field in a downlink control channel.

In a possible implementation manner, the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal; or, the ACK/NACK indication information indicates a total bit number of the ACK/NACK feedback information on each of the aggregated/activated carriers by the terminal or a total downlink transmission number corresponding to the ACK/NACK feedback information on each of the aggregated/activated carriers by the terminal.

In a possible implementation manner, if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the determining, by the terminal, the ACK/NACK indication information specifically includes: the terminal generates ACK/NACK feedback information, and takes the bit number of the ACK/NACK feedback information as the ACK/NACK indication information, or takes the total downlink transmission number corresponding to the ACK/NACK feedback information as the ACK/NACK indication information; or

The terminal generates ACK/NACK feedback information, selects a value which is not less than the bit number of the ACK/NACK feedback information from a plurality of bit numbers of the ACK/NACK feedback information which are predefined or pre-configured by a high-level signaling as the ACK/NACK indication information, or selects a value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are predefined or pre-configured by a high-level signaling as the ACK/NACK indication information; or

The terminal generates ACK/NACK feedback information for each aggregation/activation carrier, and takes the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers as the ACK/NACK indication information, or takes the product of the maximum value of the downlink transmission sum corresponding to the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers as the ACK/NACK indication information; or

The terminal generates ACK/NACK feedback information, and takes the ACK/NACK feedback information bit number corresponding to the downlink transmission total number indicated in the downlink control channel corresponding to the ACK/NACK feedback information as the ACK/NACK indication information, or takes the downlink transmission total number as the ACK/NACK indication information;

if the ACK/NACK indication information indicates the total bit number of the ACK/NACK feedback information on each carrier in the aggregation/activation carriers of the terminal or the total downlink transmission number corresponding to the ACK/NACK feedback information on each carrier in the aggregation/activation carriers of the terminal, the terminal determines the ACK/NACK indication information, which specifically includes:

the terminal generates ACK/NACK feedback information for each aggregation/activation carrier, and takes the bit number of the ACK/NACK feedback information of each aggregation/activation carrier as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information, or takes the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information; or

The terminal generates ACK/NACK feedback information for each aggregation/activation carrier, selects a value which is not less than the bit number of the ACK/NACK feedback information from the bit numbers of a plurality of ACK/NACK feedback information which are pre-defined or pre-configured by a high-level signaling as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information, or selects a value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are pre-defined or pre-configured by a high-level signaling as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information.

In a possible implementation manner, the generating, by the terminal, ACK/NACK feedback information, or generating, by the terminal, ACK/NACK feedback information for each aggregation/activation carrier specifically includes:

the terminal generates ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same moment; or

And the terminal generates the ACK/NACK feedback information according to the transmission time interval TTI number and/or the process number and/or the carrier number of the downlink transmission which feeds back the ACK/NACK feedback information at the same moment.

In a possible embodiment, the generating, by the terminal, ACK/NACK feedback information, selecting, as the ACK/NACK indication information, one value that is not less than the number of bits of the ACK/NACK feedback information from among a plurality of predefined bits of ACK/NACK feedback information or a plurality of downlink transmission total numbers that are preconfigured by a higher layer signaling, or selecting, as the ACK/NACK indication information, one value that is not less than the total number of downlink transmissions corresponding to the ACK/NACK feedback information, includes:

when the sequence length of the ACK/NACK feedback information is smaller than the total number of ACK/NACK bits indicated by the ACK/NACK indication information, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information is smaller than the total number of downlink transmissions indicated by the ACK/NACK indication information, the terminal supplements NACK at the end of the sequence of the ACK/NACK feedback information until the sequence length of the ACK/NACK feedback information is equal to the total number of ACK/NACK bits indicated by the ACK/NACK indication information or the total number of ACK/NACK bits corresponding to the total number of downlink transmissions indicated by the ACK/NACK indication information;

the terminal generates ACK/NACK feedback information for each aggregation/activation carrier, takes the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers as the ACK/NACK indication information, or takes the product of the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers as the ACK/NACK indication information, and the method comprises the following steps:

when the number of bits of the ACK/NACK feedback information of one aggregation/active carrier is less than the maximum value of the number of bits of the ACK/NACK feedback information of each aggregation/active carrier, or when the total downlink transmission number corresponding to the ACK/NACK feedback information of one aggregation/active carrier is smaller than the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/active carrier, the terminal supplements NACK at the end of the sequence of the ACK/NACK feedback information of the aggregation/activation carrier wave until the sequence length of the ACK/NACK feedback information of the aggregation/activation carrier wave is equal to the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier wave or the total bit number of the ACK/NACK corresponding to the maximum value of the downlink transmission total number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier wave;

the terminal generates ACK/NACK feedback information for each aggregation/activation carrier, selects a value which is not less than the bit number of the ACK/NACK feedback information from the bit numbers of a plurality of ACK/NACK feedback information which are pre-defined or pre-configured by a high-level signaling as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information, or selects a value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are pre-defined or pre-configured by a high-level signaling as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information, and the method comprises the following steps:

when the sequence length of the ACK/NACK feedback information of one aggregation/active carrier is less than the total number of ACK/NACK bits of the one aggregation/active carrier indicated by the ACK/NACK indication information, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information of one aggregation/active carrier is less than the total number of downlink transmissions of the one aggregation/active carrier indicated by the ACK/NACK indication information, the terminal complements NACK at the end of the sequence of the ACK/NACK feedback information of the one aggregation/active carrier until the sequence length of the ACK/NACK feedback information of the one aggregation/active carrier is equal to the total number of ACK/NACK bits of the one aggregation/active carrier indicated by the ACK/NACK indication information or the total number of ACK transmissions corresponding to the total number of downlink transmissions of the one aggregation/active carrier indicated by the ACK/NACK indication information /total number of NACK bits.

In a possible implementation manner, when there is a physical downlink shared channel that does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, the total number of bits of ACK/NACK or the total number of downlink transmissions indicated by the ACK/NACK indication information is added by 1.

In a second aspect, an embodiment of the present invention provides a method for transmitting ACK/NACK feedback information, including:

a base station receives ACK/NACK (acknowledgement/negative acknowledgement) indication information reported by a terminal, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal;

and the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the receiving, by the base station, the ACK/NACK indication information reported by the terminal, and receiving, according to the ACK/NACK indication information, the ACK/NACK feedback information reported by the terminal includes:

the base station determines a first channel resource for transmitting the ACK/NACK indication information, and receives the ACK/NACK indication information on the first channel resource;

and the base station determines a second channel resource for transmitting the ACK/NACK feedback information and receives the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In a possible implementation manner, the determining, by the base station, a first channel resource for transmitting the ACK/NACK indication information includes:

the base station determines that the first channel resource is pre-configured to the terminal by the base station through a high-level signaling;

or, the base station determines that the first channel resource is at least one first channel resource in a first channel resource set indicated to the terminal by the base station through a bit field in a downlink control channel, where the first channel resource set is pre-configured to the terminal by the base station through a high-level signaling.

In a possible implementation manner, the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal;

or, the ACK/NACK indication information indicates a total bit number of the ACK/NACK feedback information on each of the aggregated/activated carriers by the terminal or a total downlink transmission number corresponding to the ACK/NACK feedback information on each of the aggregated/activated carriers by the terminal.

In a possible implementation manner, if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the receiving, by the base station, the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information specifically includes:

the base station determines that the ACK/NACK indication information indicates the bit number of the ACK/NACK feedback information, or the ACK/NACK indication information indicates the total downlink transmission number corresponding to the ACK/NACK feedback information; or

The base station determines one value, which is not less than the bit number of the ACK/NACK feedback information, in a plurality of bit numbers of ACK/NACK feedback information which are predefined by the ACK/NACK indication information or configured by the ACK/NACK indication information in advance, or one value, which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information, in a plurality of downlink transmission total numbers which are predefined by the ACK/NACK indication information or configured by the high-layer signaling in advance; or

The base station determines the product of the maximum value of the bit number of the ACK/NACK feedback information indicating each aggregation/activation carrier and the number of the aggregation/activation carriers, or the product of the maximum value of the downlink transmission total number corresponding to the ACK/NACK feedback information indicating each aggregation/activation carrier and the number of the aggregation/activation carriers; or

The base station determines the ACK/NACK feedback information bit number or the downlink transmission total number corresponding to the downlink transmission total number indicated in the downlink control channel corresponding to the ACK/NACK feedback information indicated by the ACK/NACK indication information;

if the ACK/NACK indication information indicates the total bit number of the ACK/NACK feedback information on each carrier in the aggregation/activation carriers of the terminal or the total downlink transmission number corresponding to the ACK/NACK feedback information on each carrier in the aggregation/activation carriers of the terminal, the receiving, by the base station, the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information specifically includes: the base station determines that the ACK/NACK indication information contains indication information of each aggregation/activation carrier corresponding to the terminal, and the indication information of one aggregation/activation carrier corresponding to the terminal indicates the bit number of ACK/NACK feedback information of one aggregation/activation carrier or the indication information of one aggregation/activation carrier corresponding to the terminal indicates the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier; or

The base station determines that the ACK/NACK indication information contains indication information of each aggregation/activation carrier corresponding to the terminal, and the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value which is not less than the bit number of the ACK/NACK feedback information of the one aggregation/activation carrier in a plurality of bit numbers of ACK/NACK feedback information which are predefined or configured in advance by a high-level signaling or indicates one value which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier in a plurality of downlink transmission total numbers which are predefined or configured in advance by a high-level signaling.

In a possible implementation manner, the base station determines that the terminal generates ACK/NACK feedback information as follows: the terminal generates ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same moment; or

In a possible implementation manner, when the base station determines that one of a plurality of bit numbers of ACK/NACK feedback information, which are predefined by the ACK/NACK indication information or preconfigured by a high-layer signaling, of the bit numbers of the ACK/NACK feedback information is not less than the bit number of the ACK/NACK feedback information, or determines that one of a plurality of total downlink transmissions, which are predefined by the ACK/NACK indication information or preconfigured by a high-layer signaling, of the total downlink transmissions is not less than the total downlink transmissions corresponding to the ACK/NACK feedback information, the receiving, by the base station, the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information specifically includes:

the base station determines that the terminal generates ACK/NACK feedback information according to the following modes:

when the sequence length of ACK/NACK feedback information generated by the terminal according to the detected downlink transmission is smaller than the total number of ACK/NACK bits indicated by the ACK/NACK indication information, or when the total number of the downlink transmission detected by the terminal is smaller than the total number of the downlink transmission indicated by the ACK/NACK indication information, the terminal supplements NACK at the end of the sequence of the ACK/NACK feedback information until the sequence length of the ACK/NACK feedback information is equal to the total number of ACK/NACK bits indicated by the ACK/NACK indication information or the total number of ACK/NACK bits corresponding to the total number of the downlink transmission indicated by the ACK/NACK indication information;

when the base station determines that the ACK/NACK indication information indicates a product of a maximum value of bit numbers of ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, or that the ACK/NACK indication information indicates a product of a maximum value of a total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information, which specifically includes: the base station determines that the terminal generates ACK/NACK feedback information according to the following modes:

when the bit number of ACK/NACK feedback information generated by the terminal according to the detected downlink transmission on one aggregation/activation carrier is smaller than the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier, or when the total number of downlink transmissions detected by the terminal on one aggregation/activation carrier is smaller than the maximum value of the total number of downlink transmissions corresponding to the ACK/NACK feedback information of each aggregation/activation carrier, the terminal supplements NACK at the end of the sequence of the ACK/NACK feedback information of the aggregation/activation carriers until the sequence length of the ACK/NACK feedback information of the aggregation/activation carriers is equal to the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier or the ACK/NACK corresponding to the maximum value of the total number of downlink transmissions corresponding to the ACK/NACK feedback information of each aggregation/activation carrier Total number of NACK bits;

when the base station determines that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the bit number of the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of bit numbers of ACK/NACK feedback information predefined or preconfigured by a high-level signaling, or the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of total downlink transmission numbers predefined or preconfigured by a high-level signaling, the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information, the method specifically comprises the following steps: the base station determines that the terminal generates ACK/NACK feedback information according to the following modes:

when the sequence length of ACK/NACK feedback information generated by the terminal according to the detected downlink transmission on one aggregation/activation carrier is smaller than the total number of ACK/NACK bits of the aggregation/activation carrier indicated by the ACK/NACK indication information, or when the total number of downlink transmissions detected by the terminal on the aggregation/activation carrier is smaller than the total number of downlink transmissions of the aggregation/activation carrier indicated by the ACK/NACK indication information, the terminal supplements NACK at the end of the sequence of the ACK/NACK feedback information of the aggregation/activation carrier until the sequence length of the ACK/NACK feedback information of the aggregation/activation carrier is equal to the total number of ACK/NACK bits of the aggregation/activation carrier indicated by the ACK/NACK indication information or the aggregation/activation carrier indicated by the ACK/NACK indication information And the total bit number of ACK/NACK corresponding to the total downlink transmission number of the wave.

In a possible implementation manner, when there is a physical downlink shared channel that does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, the base station determines that the total number of bits of ACK/NACK indicated by the ACK/NACK indication information includes the number of bits of ACK/ANCK feedback information of the physical downlink shared channel or the total number of downlink transmissions includes the physical downlink shared channel.

In a third aspect, an embodiment of the present invention provides a terminal, including:

a processing module, configured to determine ACK/NACK indication information, where the ACK/NACK indication information at least includes information used to determine a bit number of ACK/NACK feedback information transmitted by the terminal;

and the reporting module is used for reporting the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the reporting module is specifically configured to: determining a first channel resource for transmitting the ACK/NACK indication information, and transmitting the ACK/NACK indication information on the first channel resource; and determining a second channel resource for transmitting the ACK/NACK feedback information, and transmitting the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In a possible implementation manner, the reporting module is specifically configured to: acquiring the first channel resource pre-configured by a network side through a high-level signaling; or, acquiring a first channel resource set pre-configured by a network side through a high-level signaling, and determining at least one first channel resource in the first channel resource set according to a bit field in a downlink control channel.

In a possible implementation manner, if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the processing module is specifically configured to:

generating ACK/NACK feedback information, and using the bit number of the ACK/NACK feedback information as the ACK/NACK indication information, or using the total downlink transmission number corresponding to the ACK/NACK feedback information as the ACK/NACK indication information; or

Generating ACK/NACK feedback information, selecting a value which is not less than the bit number of the ACK/NACK feedback information from a plurality of bit numbers of the ACK/NACK feedback information which are predefined or pre-configured by a high-layer signaling as the ACK/NACK indication information, or selecting a value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are predefined or pre-configured by a high-layer signaling as the ACK/NACK indication information; or

Generating ACK/NACK feedback information for each aggregation/activation carrier, taking the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers as the ACK/NACK indication information, or taking the product of the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers as the ACK/NACK indication information; or

Generating ACK/NACK feedback information, and using the ACK/NACK feedback information bit number corresponding to the total downlink transmission number indicated in the downlink control channel corresponding to the ACK/NACK feedback information as the ACK/NACK indication information, or using the total downlink transmission number as the ACK/NACK indication information;

if the ACK/NACK indication information indicates a total bit number of the ACK/NACK feedback information on each carrier of aggregation/active carriers of the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information on each carrier of the aggregation/active carriers of the terminal, the determining module is specifically configured to:

generating ACK/NACK feedback information for each aggregation/activation carrier, taking the bit number of the ACK/NACK feedback information of each aggregation/activation carrier as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information, or taking the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information; or

Generating ACK/NACK feedback information for each aggregation/activation carrier, selecting a value which is not less than the bit number of the ACK/NACK feedback information from the bit numbers of a plurality of ACK/NACK feedback information which are pre-defined or pre-configured by a high-level signaling as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information, or selecting a value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are pre-defined or pre-configured by a high-level signaling as the indication information corresponding to the aggregation/activation carrier in the ACK/NACK indication information.

In a possible embodiment, the processing module is specifically configured to: generating ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same time; or generating the ACK/NACK feedback information according to the transmission time interval TTI number and/or the process number and/or the carrier number of the downlink transmission feeding back the ACK/NACK feedback information at the same time.

In a possible embodiment, the processing module is specifically configured to:

when the sequence length of the ACK/NACK feedback information is smaller than the total number of ACK/NACK bits indicated by the ACK/NACK indication information, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information is smaller than the total number of downlink transmissions indicated by the ACK/NACK indication information, supplementing NACK at the end of the sequence of the ACK/NACK feedback information until the sequence length of the ACK/NACK feedback information is equal to the total number of ACK/NACK bits indicated by the ACK/NACK indication information or the total number of ACK/NACK bits corresponding to the total number of downlink transmissions indicated by the ACK/NACK indication information;

when the number of bits of the ACK/NACK feedback information of one aggregation/active carrier is less than the maximum value of the number of bits of the ACK/NACK feedback information of each aggregation/active carrier, or when the total downlink transmission number corresponding to the ACK/NACK feedback information of one aggregation/active carrier is smaller than the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/active carrier, supplementing NACK at the end of the sequence of the ACK/NACK feedback information of the aggregation/activation carriers until the sequence length of the ACK/NACK feedback information of the aggregation/activation carriers is equal to the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier or the total bit number of ACK/NACK corresponding to the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier;

when the sequence length of the ACK/NACK feedback information of one aggregation/active carrier is less than the total number of ACK/NACK bits of the one aggregation/active carrier indicated by the ACK/NACK indication information, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information of one aggregation/active carrier is less than the total number of downlink transmissions of the one aggregation/active carrier indicated by the ACK/NACK indication information, performing NACK padding at the end of the sequence of the ACK/NACK feedback information of the one aggregation/active carrier until the sequence length of the ACK/NACK feedback information of the one aggregation/active carrier is equal to the total number of ACK/NACK bits of the one aggregation/active carrier indicated by the ACK/NACK indication information or the total number of ACK/NACK transmissions corresponding to the total number of downlink transmissions of the one aggregation/active carrier indicated by the ACK/NACK indication information The number of bits.

In a fourth aspect, an embodiment of the present invention provides a base station, including:

a first receiving module, configured to receive ACK/NACK indication information reported by a terminal, where the ACK/NACK indication information at least includes information used to determine a bit number of ACK/NACK feedback information transmitted by the terminal;

and the second receiving module is used for receiving the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the first receiving module is specifically configured to: determining a first channel resource for transmitting the ACK/NACK indication information, and receiving the ACK/NACK indication information on the first channel resource;

the second receiving module is specifically configured to: and determining a second channel resource for transmitting the ACK/NACK feedback information, and receiving the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In a possible implementation manner, the first receiving module is specifically configured to:

determining that the first channel resource is pre-configured to the terminal by the base station through a high-level signaling;

or, determining that the first channel resource is at least one first channel resource in a first channel resource set indicated to the terminal by the base station through a bit field in a downlink control channel, where the first channel resource set is pre-configured to the terminal by the base station through a high-level signaling.

In a possible implementation manner, if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the second receiving module is specifically configured to:

determining the bit number of the ACK/NACK feedback information indicated by the ACK/NACK indication information, or determining the total downlink transmission number corresponding to the ACK/NACK feedback information indicated by the ACK/NACK indication information; or

Determining one value, which is not less than the bit number of the ACK/NACK feedback information, in a plurality of bit numbers of ACK/NACK feedback information which are predefined by the ACK/NACK indication information or configured by a plurality of downlink transmission total numbers which are predefined by the ACK/NACK indication information or configured by a high-layer signaling, or is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information; or

Determining the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier indicated by the ACK/NACK indication information and the number of the aggregation/activation carriers, or the product of the maximum value of the downlink transmission total number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier indicated by the ACK/NACK indication information and the number of the aggregation/activation carriers; or

Determining the ACK/NACK feedback information bit number or the downlink transmission total number corresponding to the downlink transmission total number indicated in the downlink control channel corresponding to the ACK/NACK feedback information indicated by the ACK/NACK indication information;

if the ACK/NACK indication information indicates a total bit number of the ACK/NACK feedback information on each carrier of aggregation/active carriers of the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information on each carrier of the aggregation/active carriers of the terminal, the second receiving module is specifically configured to:

determining that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, where the indication information of one aggregation/activation carrier corresponding to the terminal indicates a bit number of ACK/NACK feedback information of one aggregation/activation carrier or the indication information of one aggregation/activation carrier corresponding to the terminal indicates a total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier; or

Determining that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, where the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the bit number of the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of bit numbers of ACK/NACK feedback information predefined or preconfigured by a high-layer signaling or indicates one value, which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of total downlink transmission numbers predefined or preconfigured by a high-layer signaling.

In a possible implementation manner, the second receiving module is specifically configured to: determining that the terminal generates ACK/NACK feedback information according to the following mode: the terminal generates ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same moment; or the terminal generates the ACK/NACK feedback information according to the transmission time interval TTI number and/or the process number and/or the carrier number of the downlink transmission which feeds back the ACK/NACK feedback information at the same moment.

In a possible implementation manner, when the base station determines that the ACK/NACK indication information indicates one of a plurality of bits of ACK/NACK feedback information predefined by or preconfigured by a higher layer signaling and is not less than the number of bits of the ACK/NACK feedback information, or that the ACK/NACK indication information indicates one of a plurality of total downlink transmissions predefined by or preconfigured by a higher layer signaling and is not less than the total downlink transmissions corresponding to the ACK/NACK feedback information, the second receiving module is specifically configured to: determining that the terminal generates ACK/NACK feedback information according to the following mode:

when the base station determines that the ACK/NACK indication information indicates a product of a maximum value of bit numbers of ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, or that the ACK/NACK indication information indicates a product of a maximum value of a total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, the second receiving module is specifically configured to: determining that the terminal generates ACK/NACK feedback information according to the following mode:

when the base station determines that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, and the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the bit number of the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of bit numbers of ACK/NACK feedback information predefined or preconfigured by a high-layer signaling or indicates one value, which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of total downlink transmission numbers predefined or preconfigured by a high-layer signaling, of the indication information of the one aggregation/activation carrier, the second receiving module is specifically configured to:

determining that the terminal generates ACK/NACK feedback information according to the following mode:

In a possible embodiment, when there is a physical downlink shared channel that does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, the second receiving module is specifically configured to: and determining that the total number of ACK/NACK bits indicated by the ACK/NACK indication information includes the number of bits of ACK/ANCK feedback information of the physical downlink shared channel or the total number of downlink transmissions includes the physical downlink shared channel.

In a fifth aspect, an embodiment of the present invention provides another terminal, including a processor, a memory, and a transceiver, where the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, and the processor reads the program in the memory and executes the following processes according to the program:

determining ACK/NACK indication information, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal; and reporting the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information through a transceiver.

In a possible embodiment, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the processor determines a first channel resource for transmitting the ACK/NACK indication information, and instructs the transceiver to transmit the ACK/NACK indication information on the first channel resource;

and determining second channel resources for transmitting the ACK/NACK feedback information, and instructing a transceiver to transmit the ACK/NACK feedback information on the second channel resources, wherein the first channel resources are different from the second channel resources.

In a possible implementation manner, the processor acquires the first channel resource pre-configured by the network side through a high-level signaling; or, acquiring a first channel resource set pre-configured by a network side through a high-level signaling, and determining at least one first channel resource in the first channel resource set according to a bit field in a downlink control channel.

In a possible implementation manner, if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the processor is specifically configured to:

In a possible embodiment, the processor is specifically configured to: generating ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same time; or generating the ACK/NACK feedback information according to the transmission time interval TTI number and/or the process number and/or the carrier number of the downlink transmission feeding back the ACK/NACK feedback information at the same time.

In a possible embodiment, the processor is specifically configured to:

In a sixth aspect, an embodiment of the present invention provides a base station, including a processor, a memory, and a transceiver, where the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, and the processor reads the preset program in the memory, and executes the following processes according to the program:

receiving ACK/NACK (acknowledgement/negative acknowledgement) indication information reported by a terminal through a transceiver, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal; and indicating the transceiver to receive the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the processor is specifically configured to:

determining a first channel resource for transmitting the ACK/NACK indication information, instructing a transceiver to receive the ACK/NACK indication information on the first channel resource;

and determining second channel resources for transmitting the ACK/NACK feedback information, and indicating a transceiver to receive the ACK/NACK feedback information on the second channel resources, wherein the first channel resources are different from the second channel resources.

In a possible embodiment, the processor is specifically configured to: determining that the first channel resource is pre-configured to the terminal by the base station through a high-level signaling; or, determining that the first channel resource is at least one first channel resource in a first channel resource set indicated to the terminal by the base station through a bit field in a downlink control channel, where the first channel resource set is pre-configured to the terminal by the base station through a high-level signaling.

In a possible implementation, the processor determines that the terminal generates ACK/NACK feedback information as follows: the terminal generates ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same moment; or the terminal generates the ACK/NACK feedback information according to the transmission time interval TTI number and/or the process number and/or the carrier number of the downlink transmission which feeds back the ACK/NACK feedback information at the same moment.

In a possible implementation manner, when the base station determines that the ACK/NACK indication information indicates one of a plurality of bits of ACK/NACK feedback information predefined by or preconfigured by a higher layer signaling and is not less than the number of bits of the ACK/NACK feedback information, or that the ACK/NACK indication information indicates one of a plurality of total downlink transmissions predefined by or preconfigured by a higher layer signaling and is not less than the total downlink transmissions corresponding to the ACK/NACK feedback information, the processor determines that the terminal generates ACK/NACK feedback information in the following manner:

when the base station determines that the ACK/NACK indication information indicates the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers, or that the ACK/NACK indication information indicates the product of the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers, a processor determines that the terminal generates the ACK/NACK feedback information in the following way:

when the base station determines that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, and the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the bit number of the ACK/NACK feedback information of the one aggregation/activation carrier, of bit numbers of a plurality of ACK/NACK feedback information predefined or preconfigured by a high-level signaling or one value, which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier, of a plurality of downlink transmission numbers predefined or preconfigured by a high-level signaling, of the indication information of the one aggregation/activation carrier corresponding to the one aggregation/activation carrier, a processor determines that the terminal generates ACK/NACK feedback information in the following manner:

In a possible implementation manner, when there is a physical downlink shared channel which does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, the processor determines that the total number of bits of ACK/NACK indicated by the ACK/NACK indication information includes the number of bits of ACK/ANCK feedback information of the physical downlink shared channel or the total number of downlink transmissions includes the physical downlink shared channel.

Based on the technical scheme, in the embodiment of the invention, the terminal reports the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information, and the ACK/NACK indication information at least comprises information for determining the bit number of the ACK/NACK feedback information transmitted by the terminal, so that the understanding of the terminal and the base station on the ACK/NACK feedback bit number is consistent, the correct analysis of ACK/NACK is ensured, and the downlink retransmission is avoided as much as possible.

Drawings

FIG. 1 is a schematic structural diagram of FS 1;

FIG. 2 is a schematic structural diagram of FS 2;

fig. 3 is a flowchart illustrating a method for transmitting ACK/NACK feedback information at a terminal side according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating a method for receiving ACK/NACK feedback information by a base station side according to an embodiment of the invention;

FIG. 5a is a diagram illustrating transmission of ACK/NACK indication information and ACK/NACK feedback information in a first embodiment of the invention;

FIG. 5b is a diagram illustrating transmission of ACK/NACK indication information and ACK/NACK feedback information in accordance with the first embodiment of the present invention;

FIG. 5c is a diagram illustrating transmission of ACK/NACK indication information and ACK/NACK feedback information in accordance with the first embodiment of the present invention;

FIG. 6 is a diagram illustrating transmission of ACK/NACK indication information and ACK/NACK feedback information in a second embodiment of the invention;

FIG. 7 is a diagram illustrating transmission of ACK/NACK indication information and ACK/NACK feedback information in a third embodiment of the invention;

fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a base station structure according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another terminal according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another base station in the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core idea of the invention is as follows: when the terminal reports the ACK/NACK feedback information, it needs to additionally report ACK/NACK indication information, where the ACK/NACK indication information at least includes a bit number of the ACK/NACK feedback information transmitted by the terminal, and the additional report needs to be obtained before the base station analyzes the ACK/NACK feedback information reported by the terminal.

It should be noted that the Downlink transmission mentioned in the embodiment of the present invention may be short TTI (referred to as sTTI) transmission or may also be traditional (i.e. 1ms) TTI transmission, the Downlink control Channel indicating release of Downlink Semi-Persistent Scheduling (SPS) resources and the Downlink control Channel indicating activation of Downlink SPS resources mentioned in the embodiment of the present invention, and the Physical Downlink Shared Channel (PDSCH) may be short TTI transmission or may also be traditional (i.e. 1ms) TTI transmission.

In the embodiment of the present invention, as shown in fig. 3, a detailed method flow for transmitting ACK/NACK feedback information by a terminal side is as follows:

step 301: the terminal determines ACK/NACK indication information, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal.

In the embodiment of the invention, the ACK/NACK indication information is used for indicating the total bit number of ACK/NACK feedback information reported by a terminal or the total downlink transmission number corresponding to the ACK/NACK feedback information reported by the terminal; or, the ACK/NACK indication information indicates a total bit number of ACK/NACK feedback information of the terminal on each of the aggregated/activated carriers or a total downlink transmission number corresponding to the ACK/NACK feedback information of the terminal on each of the aggregated/activated carriers.

Specifically, if the ACK/NACK indication information is used to indicate a total bit number of ACK/NACK feedback information reported by the terminal or a total downlink transmission number corresponding to the ACK/NACK feedback information reported by the terminal, the terminal determines the ACK/NACK indication information, which includes, but is not limited to, the following methods:

in the method 1, the terminal generates ACK/NACK feedback information, and the bit number of the ACK/NACK feedback information is used as ACK/NACK indication information, or the total downlink transmission number corresponding to the ACK/NACK feedback information is used as the ACK/NACK indication information.

Specifically, the total downlink transmission number may be specifically represented by a total number of PDSCH and control channels indicating downlink SPS resource release, and may further include SPS PDSCH; the total number of downlink transmissions and the total number of bits may be converted, and for example, the total number of bits of ACK/NACK may be determined according to the transmission mode of each downlink transmission, whether spatial combination is performed, and other information. The following explanation of the total number of downlink transmissions in each embodiment may refer to the description herein, and will not be repeated.

And 2, the terminal generates ACK/NACK feedback information, selects a value which is not less than the bit number of the ACK/NACK feedback information from a plurality of bit numbers of the ACK/NACK feedback information which are pre-defined or pre-configured by a high-level signaling as ACK/NACK indication information, or selects a value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are pre-defined or pre-configured by the high-level signaling as the ACK/NACK indication information.

Specifically, corresponding to method 2, when the sequence length of the ACK/NACK feedback information is smaller than the total number of ACK/NACK bits indicated by the ACK/NACK indication information, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information is smaller than the total number of downlink transmissions indicated by the ACK/NACK indication information, the terminal complements NACK at the end of the sequence of the ACK/NACK feedback information until the sequence length of the ACK/NACK feedback information is equal to the total number of ACK/NACK bits indicated by the ACK/NACK indication information or the total number of ACK/NACK bits corresponding to the total number of downlink transmissions indicated by the ACK/NACK indication information.

In the method 3, the terminal generates ACK/NACK feedback information for each aggregation (or active) carrier, and takes the product of the maximum value of the number of bits of the ACK/NACK feedback information of each aggregation (or active) carrier and the number of aggregation (or active) carriers as ACK/NACK indication information, or takes the product of the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation (or active) carrier and the number of aggregation/active carriers as ACK/NACK indication information.

In particular, corresponding to method 3, when the number of bits of ACK/NACK feedback information of one aggregated (or activated) carrier is less than the maximum value of the number of bits of ACK/NACK feedback information of each aggregated (or activated) carrier, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information of one aggregated (or activated) carrier is less than the maximum value of the total number of downlink transmissions corresponding to the ACK/NACK feedback information of each aggregated (or activated) carrier, and the terminal supplements NACK at the end of the sequence of the ACK/NACK feedback information of the aggregation (or activation) carrier until the sequence length of the ACK/NACK feedback information of the aggregation (or activation) carrier is equal to the maximum value of the bit number of the ACK/NACK feedback information of each aggregation (or activation) carrier or the total bit number of the ACK/NACK corresponding to the maximum value of the downlink transmission total number corresponding to the ACK/NACK feedback information of each aggregation (or activation) carrier.

And 4, generating ACK/NACK feedback information by the terminal, and taking the ACK/NACK feedback information bit number corresponding to the downlink transmission total number indicated in the downlink control channel corresponding to the ACK/NACK feedback information as the ACK/NACK indication information or taking the downlink transmission total number as the ACK/NACK indication information.

For example, each Downlink control channel includes a T-DAI (Total Downlink Assignment Index) for indicating the Total number of Downlink transmissions scheduled on all configured carriers up to the current subframe/TTI, and each TTI on each carrier is a Downlink transmission; for carrier aggregation, the T-DAIs are the same on all carriers at the same time domain location (e.g., subframe or TTI), and the T-DAIs may be different at different time domain locations.

Specifically, if the ACK/NACK indication information indicates the total bit number of the ACK/NACK feedback information of the terminal on each carrier in the aggregated (or activated) carriers or the total downlink transmission number corresponding to the ACK/NACK feedback information of the terminal on each carrier in the aggregated/activated carriers, the terminal determines the ACK/NACK indication information, including but not limited to the following methods:

in the method 5, the terminal generates ACK/NACK feedback information for each aggregated (or activated) carrier, and uses the bit number of the ACK/NACK feedback information of each aggregated (or activated) carrier as the indication information corresponding to the aggregated (or activated) carrier in the ACK/NACK indication information, or uses the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregated (or activated) carrier as the indication information corresponding to the aggregated/activated carrier in the ACK/NACK indication information.

And 6, the terminal generates ACK/NACK feedback information for each aggregation (or activated) carrier, selects one value which is not less than the bit number of the ACK/NACK feedback information from the bit numbers of a plurality of ACK/NACK feedback information which are pre-defined or pre-configured by the high-layer signaling as the indication information corresponding to the aggregation (or activated) carrier in the ACK/NACK indication information, or selects one value which is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information from a plurality of downlink transmission total numbers which are pre-defined or pre-configured by the high-layer signaling as the indication information corresponding to the aggregation (or activated) carrier in the ACK/NACK indication information.

Specifically, corresponding to method 6, when the sequence length of the ACK/NACK feedback information of one aggregation (or active) carrier is less than the total number of ACK/NACK bits of one aggregation/active carrier indicated by the ACK/NACK indication information, or when the total number of downlink transmissions corresponding to the ACK/NACK feedback information of one aggregation (or active) carrier is less than the total number of downlink transmissions of one aggregation/active carrier indicated by the ACK/NACK indication information, the terminal complements NACK at the end of the sequence of the ACK/NACK feedback information of the one aggregation (or active) carrier until the sequence length of the ACK/NACK feedback information of the one aggregation (or active) carrier is equal to the total number of ACK/NACK bits of the one aggregation (or active) carrier indicated by the ACK/NACK indication information or the total number of ACK/NACK bits corresponding to the total number of downlink transmissions of the one aggregation (or active) carrier indicated by the ACK/NACK indication information .

The terminal generates ACK/NACK feedback information, or the terminal generates ACK/NACK feedback information for each aggregated (or activated) carrier, including but not limited to the following two implementation manners:

in the first mode, the terminal generates the ACK/NACK feedback information according to the DAI corresponding to the downlink transmission for feeding back the ACK/NACK feedback information at the same time.

Specifically, the downlink transmission for feeding back ACK/NACK feedback information at the same time includes the received downlink transmission and the downlink transmission capable of determining packet loss according to the DAI, and may be that the ACK/NACK is sorted based on the DAI, the packet loss is determined by the DAI, and NACK is generated at a position where the packet loss is determined, where the DAI is a counter; if only one aggregation carrier is used, the aggregation carrier is a time domain counter, namely, the aggregation carrier is accumulated one by one TTI in the time domain; if multiple carriers are aggregated, the counter may be performed after the frequency domain.

Specifically, the DAI may be further divided into a C-DAI (Counter DAI, counting downlink assignment index) having the above-described DAI function and a T-DAI indicating the total number of downlink transmissions scheduled in total on all configured carriers up to the current subframe/TTI, and thus a NACK may be supplemented thereafter when the length of ACK/NACK feedback information generated according to the C-DAI is less than the length indicated by the T-DAI.

And the terminal generates the ACK/NACK feedback information according to the TTI number and/or the process number and/or the carrier number of the downlink transmission which feeds back the ACK/NACK feedback information at the same time.

Specifically, each ACK/NACK feedback bit is ordered according to a TTI number and/or a process number and/or a carrier number, and each ACK/NACK feedback bit carries a TTI number and/or a process number and/or a carrier number corresponding to each ACK/NACK feedback bit.

In the embodiment of the invention, when the physical downlink control channel which does not correspond to the downlink control channel needs to perform ACK/NACK feedback, the total bit number of ACK/NACK or the total downlink transmission number indicated by the ACK/NACK indication information is added by 1.

Specifically, when there is a physical downlink shared channel which does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, that is, when there is ACK/NACK feedback information of the SPS PDSCH at the time of ACK/NACK feedback information transmission and needs to transmit, the transmission time of the ACK/NACK feedback information of the SPS PDSCH may be implicitly determined according to a feedback timing sequence or determined according to a feedback delay indication field in the downlink control channel indicating SPS resource activation; therefore, once the terminal is configured with SPS service, ACK/NACK feedback is always performed at a fixed location.

Specifically, when the SPS PDSCH is not considered when the ACK/NACK feedback sequence is generated, for example, the ACK/NACK feedback sequence is determined according to the total downlink transmission number indicated by the T-DAI, where the total downlink transmission number indicated by the T-DAI only includes the downlink control channel indicating the downlink SPS resource release and the PDSCH having the corresponding downlink control channel, and does not include the SPS PDSCH, the number of feedback information of the SPS PDSCH needs to be increased on the basis of the total feedback information number, which is usually 1 bit;

at this time, which position of the ACK/NACK feedback information of the SPS PDSCH is arranged in the ACK/NACK feedback information sequence may be predetermined, for example, always arranged at the top, or always arranged at the last, or always arranged at the top or the last of the ACK/NACK feedback information of the PCC, and the like.

Step 302: and the terminal reports the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information.

In the embodiment of the present invention, the terminal reports the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information, including but not limited to the following modes:

in the first mode, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same TTI; alternatively, the ACK/NACK indication information is transmitted in a TTI that precedes the ACK/NACK feedback information.

Specifically, when the ACK/NACK indication information is transmitted in a TTI preceding the ACK/NACK feedback information, which is previously agreed, for example, the ACK/NACK indication information is transmitted in an adjacent TTI preceding the TTI in which the ACK/NACK feedback information is transmitted.

In the second mode, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel or different channels.

In this way, the same channel means that the channel formats are the same and the channel resources are the same; different channels refer to either different channel formats and different channel resources, e.g., may be the same channel format but use different channel resources, or use different channel formats and use different channel resources.

In the embodiment of the invention, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information respectively occupy different time domain and frequency domain resources to be independently transmitted on the same channel. For example, the ACK/NACK indication information is always mapped on a specific time and frequency domain resource of the channel for transmission, and the ACK/NACK indication information is independently coded/scrambled/modulated, etc. from the ACK/NACK feedback information. Preferably, in order to ensure that the ACK/NACK indication information is resolved before the ACK/NACK feedback information, the ACK/NACK indication information is mapped to a position in the TTI that is earlier in the time domain, for example, the first symbol.

In the embodiment of the invention, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the terminal determines a first channel resource for transmitting the ACK/NACK indication information and transmits the ACK/NACK indication information on the first channel resource; and the terminal determines a second channel resource for transmitting the ACK/NACK feedback information and transmits the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In one embodiment, the terminal determines the first channel resource for transmitting the ACK/NACK indication information, which includes but is not limited to the following two ways:

firstly, a terminal acquires a first channel resource pre-configured by a network side through a high-level signaling;

secondly, the terminal acquires a first channel resource set pre-configured by the network side through a high-level signaling, and determines at least one first channel resource in the first channel resource set according to a bit field in the downlink control channel. The higher layer signaling may be Radio Resource Control (RRC) signaling.

In the embodiment of the invention, the channel format for transmitting the ACK/NACK indication information is the same as or different from the channel format for transmitting the ACK/NACK feedback information.

Specifically, if the ACK/NACK indication information is used to indicate the total bit number of the ACK/NACK feedback information reported by the terminal, the terminal sorts the ACK/NACK feedback information based on a DAI value corresponding to downlink transmission for transmitting the ACK/NACK feedback information at the same time, and generates NACK feedback information at a position where packet loss is determined by the DAI, and if the length of an ACK/NACK feedback information sequence generated according to the DAI value sorting is smaller than the total bit number of the ACK/NACK feedback information, NACK is supplemented at the end of the ACK/NACK feedback information sequence until the length of the ACK/NACK feedback information sequence is equal to the total bit number of the ACK/NACK feedback information, where the DAI value is a time domain counter; alternatively, the first and second electrodes may be,

and the terminal sequences based on TTI numbers and/or process numbers corresponding to the ACK/NACK feedback bits, each ACK/NACK feedback bit carries the TTI number and/or the process number corresponding to the ACK/NACK feedback bit, and if the total bit number of an ACK/NACK feedback information sequence consisting of the received ACK/NACK feedback bits of downlink transmission is less than the total bit number of the ACK/NACK feedback information, NACK is supplemented at the tail of the ACK/NACK feedback information sequence until the length of the ACK/NACK feedback information sequence is equal to the total bit number of the ACK/NACK feedback information.

Specifically, if the ACK/NACK indication information indicates the total bit number of the ACK/NACK feedback information of the terminal on each carrier in the aggregated carriers, the terminal sorts the ACK/NACK feedback information on each carrier based on a DAI value corresponding to downlink transmission for transmitting the ACK/NACK feedback information at the same time, generates NACK feedback information at a position where packet loss is determined by the DAI value, and supplements NACK at the end of the ACK/NACK feedback information sequence as the ACK/NACK feedback information sequence of the carrier if the length of the ACK/NACK feedback information sequence generated according to the DAI value sorting is smaller than the total bit number of the ACK/NACK feedback information, where the DAI value is a time domain counter on each carrier; cascading the ACK/NACK feedback information sequence of each carrier to obtain the ACK/NACK feedback information; alternatively, the first and second electrodes may be,

the terminal sorts based on the sending time interval TTI number and/or the process number and/or the carrier number corresponding to each ACK/NACK feedback bit, each ACK/NACK feedback bit carries the TTI number and/or the process number and/or the carrier number corresponding to each ACK/NACK feedback bit, if the total bit number of an ACK/NACK feedback information sequence formed by the received ACK/NACK feedback bits transmitted in the downlink is smaller than the total bit number of the ACK/NACK feedback information, NACK is supplemented at the end of the ACK/NACK feedback information sequence until the length of the ACK/NACK feedback information sequence is equal to the total bit number of the ACK/NACK feedback information.

Based on the same inventive concept, in the embodiment of the present invention, as shown in fig. 4, a detailed method flow for receiving ACK/NACK feedback information by a base station side is as follows:

step 401: and the base station receives ACK/NACK indication information reported by the terminal, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal.

In the embodiment of the present invention, if the ACK/NACK indication information is used to indicate the total bit number of the ACK/NACK feedback information reported by the terminal or the total downlink transmission number corresponding to the ACK/NACK feedback information reported by the terminal, the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information, which is specifically as follows:

the base station determines the bit number of ACK/NACK feedback information indicated by the ACK/NACK indication information or the total downlink transmission number corresponding to the ACK/NACK feedback information indicated by the ACK/NACK indication information; or

The base station determines one value which is not less than the bit number of the ACK/NACK feedback information in the bit numbers of a plurality of ACK/NACK feedback information which are predefined by the ACK/NACK indication information or is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information in a plurality of downlink transmission total numbers which are predefined by the ACK/NACK indication information or are configured by the high-layer signaling in advance as the ACK/NACK indication information; or

The base station determines the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation (or activated) carrier indicated by the ACK/NACK indication information and the number of the aggregation/activated carriers, or the product of the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation (or activated) carrier indicated by the ACK/NACK indication information and the number of the aggregation (or activated) carriers; or

And the base station determines the bit number of the ACK/NACK feedback information or the total downlink transmission number corresponding to the total downlink transmission number indicated in the downlink control channel corresponding to the ACK/NACK feedback information indicated by the ACK/NACK indication information.

In the embodiment of the present invention, if the ACK/NACK indication information indicates the total bit number of the ACK/NACK feedback information of the terminal on each carrier in the aggregated (or activated) carriers or the total downlink transmission number corresponding to the ACK/NACK feedback information of the terminal on each carrier in the aggregated (or activated) carriers, the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information, which is specifically as follows:

the base station determines that the ACK/NACK indication information contains indication information of each aggregation (or activated) carrier corresponding to the terminal, and the indication information of one aggregation/activated carrier corresponding to the terminal indicates the bit number of ACK/NACK feedback information of one aggregation (or activated) carrier or the indication information of one aggregation (or activated) carrier corresponding to the terminal indicates the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation (or activated) carrier; or

The base station determines that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, where the indication information of one aggregation (or activation) carrier corresponding to the terminal indicates one value, which is not less than the number of bits of ACK/NACK feedback information of the one aggregation (or activation) carrier, in predefined bits or multiple bits of ACK/NACK feedback information preconfigured by a high-layer signaling, or the indication information of the one aggregation (or activation) carrier corresponding to the terminal indicates one value, which is not less than the total number of downlink transmissions corresponding to the ACK/NACK feedback information of the one aggregation (or activation) carrier, in predefined total number or multiple downlink transmissions preconfigured by a high-layer signaling.

Step 402: and the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information.

In the embodiment of the invention, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same transmission time interval TTI; alternatively, the ACK/NACK indication information is transmitted in a transmission time interval TTI ahead of the ACK/NACK feedback information.

In the embodiment of the invention, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel or different channels.

In a specific embodiment, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information occupy different time domain and frequency domain resources on the same channel for independent transmission, respectively. Specifically, the channel format for transmitting the ACK/NACK indication information is the same as or different from the channel format for transmitting the ACK/NACK feedback information.

Specifically, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the base station determines a first channel resource for transmitting the ACK/NACK indication information, and receives the ACK/NACK indication information on the first channel resource; and the base station determines a second channel resource for transmitting the ACK/NACK feedback information and receives the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

Wherein, the base station determines a first channel resource for transmitting the ACK/NACK indication information, including but not limited to the following ways:

In the embodiment of the invention, the base station determines that the terminal generates the ACK/NACK feedback information according to the following modes:

And the terminal generates the ACK/NACK feedback information according to the TTI number and/or the process number and/or the carrier number of the downlink transmission which feeds back the ACK/NACK feedback information at the same moment.

Specifically, when the base station determines that the ACK/NACK indication information indicates one of a plurality of predefined or preconfigured high-level signaling ACK/NACK feedback information bit numbers that is not less than the ACK/NACK feedback information bit number, or the ACK/NACK indication information indicates one of a plurality of predefined or preconfigured high-level signaling downlink transmission total numbers that is not less than the downlink transmission total number corresponding to the ACK/NACK feedback information, the base station determines that the terminal generates ACK/NACK feedback information in the following manner:

when the base station determines that the ACK/NACK indication information indicates the product of the maximum value of the bit number of the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers, or that the ACK/NACK indication information indicates the product of the maximum value of the total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/activation carrier and the number of the aggregation/activation carriers, the base station determines that the terminal generates the ACK/NACK feedback information in the following way:

when the base station determines that the ACK/NACK indication information includes indication information for each aggregation/activation carrier corresponding to the terminal, when the indication information corresponding to one aggregation/activation carrier of the terminal indicates one value which is not less than the bit number of the ACK/NACK feedback information of the aggregation/activation carrier and is predefined or preconfigured by a high-layer signaling or the indication information corresponding to one aggregation/activation carrier of the terminal indicates one value which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the aggregation/activation carrier and is predefined or preconfigured by a high-layer signaling, the base station determines that the terminal generates ACK/NACK feedback information according to the following modes:

Specifically, when there is a physical downlink shared channel which does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, the base station determines that the total number of bits of ACK/NACK indicated by the ACK/NACK indication information includes the number of bits of ACK/ANCK feedback information of the physical downlink shared channel or the total number of downlink transmissions includes the physical downlink shared channel.

The process of ACK/NACK transmission is described in detail below with several specific embodiments.

First embodiment

The terminal only works on one carrier, 8 downlink short TTI transmissions are scheduled by the base station side and all carry out ACK/NACK feedback at the same time, a downlink control channel corresponding to each downlink short TTI transmission comprises 2-bit DAI, the DAI is used as a time domain counter (counter), and a value exceeding 4 is circularly indicated in a mode of modulo 4.

Specifically, when the terminal side receives the packet loss in the second downlink short TTI, it can determine that the packet loss exists at the second downlink short TTI through the continuous DAI counter value, and generate NACK for the second downlink short TTI as the feedback information. The terminal loses packets in the last 1 downlink short TTI scheduled by the base station, and the terminal can not judge whether the packet loss exists later according to the previous scheduling information, and the terminal determines ACK/NACK feedback information according to the received downlink short TTI and the downlink short TTI judging the packet loss and the transmission mode and whether the space is combined. For example, assuming that each downlink short TTI transmission is a single codeword transmission, 1-bit feedback information is generated for each received downlink short TTI and the downlink short TTI for determining packet loss, and the received downlink short TTIs and the downlink short TTIs for determining packet loss are sorted according to the DAI counter sequence to obtain 7-bit ACK/NACK feedback information, which is represented as o1, o2, …, and o7, and the terminal side considers that only 7 downlink short TTI transmissions need to perform ACK/NACK feedback.

Specifically, the terminal determines the total number of bits or the total number of downlink transmissions of the ACK/NACK information transmitted by the terminal indicated by the ACK/NACK indication information, where the total number may be the number actually detected by the terminal, or may be a value selected from predetermined values, which is closest to the actual number and is greater than the actual number, and determines the ACK/NACK indication information according to the following manner:

in the first implementation, the binary bit number corresponding to the ACK/NACK indication information is predetermined, the binary bit number is associated with a range of total bit numbers of ACK/NACK feedback information that the ACK/NACK indication information needs to indicate, for example assuming that the maximum total number of ACK/NACK bits or the total number of downlink transmissions does not exceed 16 bits, then the ACK/NACK indication information may be fixed as 4-bit information, the corresponding relationship between the total bit number of 1-16 or the total downlink transmission number and the 4-bit binary transmission sequence may be agreed, as shown in table 3, so as to obtain the binary transmission sequence corresponding to the total bit number 7 or the total downlink transmission number 7 as '0111', or directly convert 7 into binary value, for example, provision is made for a binary conversion of 7-1 ═ 6, with 0 being complemented in the upper bits, resulting in a 4-bit transmission sequence "0111"; and the terminal takes the 7-bit ACK/NACK feedback information as the actually transmitted ACK/NACK feedback information.

In a second implementation manner, assuming that 2-bit binary information is always used to represent ACK/NACK indication information, a modulo-4 many-to-one relationship is adopted for a total bit number exceeding 4 or a total downlink transmission number, and the corresponding relationship is shown in table 4, so that a binary transmission sequence "10" corresponding to a total bit number 7 or a total downlink transmission number 7 can also be obtained; and the terminal takes the 7-bit ACK/NACK feedback information as the actually transmitted ACK/ANCK feedback information.

In a third implementation manner, a plurality of ACK/NACK total bit values or total downlink transmission values that can be indicated by ACK/NACK indication information are predefined, and then the ACK/NACK total bit values or the total downlink transmission values can be used

Bit ACK/NACK indication information, A is the number of numerical values defined in advance; for example, a number of values a, such as a1 ═ 4, a2 ═ 8, a3 ═ 12, a4 ═ 16, and 2-bit ACK/NACK indication information are predefined in advance, and the correspondence between each value and the 2-bit indication information is shown in table 5, and among them, a value closest to and greater than the ACK/NACK feedback bit number or the total downlink transmission number is selected, then a2 ═ 8 is selected, and the 2-bit ACK/NACK indication information is obtained as "01"; at this time, since the total number of bits of ACK/NACK or the total number of downlink transmissions indicated by the ACK/NACK indicator information is greater than the actual number of bits or the actual number of downlink transmissions, 1-bit NACK needs to be supplemented to the ends of the generated 7-bit ACK/NACK feedback information o1, o2, …, o7, and 8-bit ACK/NACK feedback information o1, o2, …, o8 is obtained as the actually transmitted ACK/ANCK feedback information.

In this embodiment, the transmission manner of the ACK/NACK indication information includes, but is not limited to, the following two methods:

the method comprises the following steps: the ACK/NACK indication information is transmitted on the same channel resources as the ACK/NACK feedback information.

For example, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted using a sPUCCH of a PUSCH-based transmission structure, and it is assumed that the sPUCCH is transmitted using 7 symbols (e.g., SC-FDMA symbols, the same applies below), the ACK/NACK indication information is mapped to a first symbol for transmission, and the ACK/NACK feedback information is mapped to a subsequent 6 symbols for transmission. As shown in fig. 5a, assuming that 1RB transmission is occupied on the sPUCCH frequency domain, 4-bit ACK/NACK indication information obtained in the first implementation manner or 2-bit ACK/NACK indication information obtained in the second and third implementation manners is mapped to 12 REs in the frequency domain on the first symbol after being subjected to channel coding (repetition coding, RM coding, or TBCC + CRC mode, if CRC exists, the coded information includes CRC bits, the same below) and modulation (for example, QPSK modulation, the same below), and 7-bit ACK/NACK feedback information in the first and second implementation manners or 8-bit ACK/NACK feedback information in the third implementation manner is mapped to 12 REs in the frequency domain on the remaining 6 symbols after being subjected to channel coding and modulation, for example, mapping the time domain after the frequency domain, or vice versa; in the sTTI, the terminal sends ACK/NACK indication information and ACK/NACK feedback information simultaneously on the same sPUCCH, where channel resources of the sPUCCH, such as information of RB location, may be notified in downlink control signaling or preconfigured in higher layer signaling.

For another example, an sPUCCH transmission format based on a constant Amplitude Zero Auto-correlation (CAZAC) sequence is used, in which a part of symbols or CAZAC sequences on frequency domain resources are used to carry one of ACK/NACK indication information and ACK/NACK feedback information, respectively.

The method 2 comprises the following steps: the ACK/NACK indication information is transmitted on a different channel resource from the ACK/NACK feedback information.

For example, ACK/NACK feedback information is transmitted by using a sPUCCH based on a transmission structure of a PUSCH, assuming that the sPUCCH is transmitted by using 7 symbols, and the sPUCCH occupies 1 Resource Block (RB) in a frequency domain for transmission, then the 7-bit ACK/NACK feedback information in the first or second implementation manner or the 8-bit ACK/NACK feedback information in the third implementation manner is mapped onto 12 Resource Elements (REs) in the frequency domain on 7 symbols of the sPUCCH after channel coding and modulation, which may be frequency domain first and time domain second mapping, or vice versa. The ACK/NACK indication information may also be transmitted by using the same transmission structure, where the symbol length may be the same as or different from the sPUCCH for ACK/NACK feedback information transmission, for example, defined as 2 symbol lengths, and the frequency domain occupies 1RB for transmission, and then the 4-bit ACK/NACK indication information obtained in the first implementation manner or the 2-bit ACK/NACK indication information obtained in the second and third implementation manners is mapped to 12 REs in the frequency domain of the sPUCCH with the 2 symbol lengths for transmission after being channel coded and modulated. The sPUCCH carrying the ACK/NACK feedback information and the sPUCCH carrying the ACK/NACK indication information may be transmitted at the same time domain position. For example, 2 symbols occupied by the sPUCCH carrying the ACK/NACK indication information are aligned with the first two symbols of the 7 symbols occupied by the sPUCCH carrying the ACK/NACK feedback information, and different frequency domain resources (such as RBs) are occupied for transmission in the frequency domain, as shown in fig. 5b, or the symbols may not be overlapped in the time domain, for example, 2 symbols occupied by the sPUCCH carrying the ACK/NACK indication information are sent before 7 symbols occupied by the sPUCCH carrying the ACK/NACK feedback information, as shown in fig. 5 c.

For another example, the ACK/NACK feedback information is transmitted using sPUCCH based on the transmission structure of PUSCH, and the specific procedure is as above. The ACK/NACK indication information adopts a transmission structure of a CAZAC sequence, and the frequency domain occupies 1RB assuming that the transmission is carried out by using the length of 2 symbols. Directly modulating 4-bit ACK/NACK indication information obtained in the first implementation mode to obtain 2 Quadrature Phase Shift Keying (QPSK) modulation symbols, respectively carrying on different sPUCCH transmission symbols for transmission, namely, the first QPSK modulation symbol is multiplied by the CAZAC sequence after cyclic shift and then mapped to the first symbol of sUCCH for transmission, the second QPSK modulation symbol is multiplied by the CAZAC sequence after cyclic shift and then mapped to the second symbol of sUCCH for transmission, or if the sPUCCH occupies 2 or more RB transmissions, the sPUCCH can also be respectively carried on different sPUCCH frequency domain resources for transmission, that is, the first QPSK modulation symbol is multiplied by the cyclic shifted CAZAC sequence and then mapped to the first RB of sPUCCH for transmission, and the second QPSK modulation symbol is multiplied by the cyclic shifted CAZAC sequence and then mapped to the second RB of sPUCCH for transmission. And directly modulating the 2-bit ACK/NACK indication information obtained in the second and third implementation modes to obtain 1 QPSK modulation symbol, multiplying the QPSK modulation symbol by a CAZAC sequence subjected to cyclic shift, and mapping the multiplied QPSK modulation symbol to each symbol of the sUCCH and frequency domain resources for transmission.

In method 2, the ACK/NACK feedback information may also be transmitted by using a CAZAC sequence transmission structure, and the specific manner is similar to the transmission of ACK/NACK indication information, and only the original bit number is different, and the obtained QPSK modulation symbols are different in number.

In the specific embodiment, the base station side receives and analyzes the ACK/NACK indication information according to a scheme corresponding to the terminal side, determines the total bit number of ACK/NACK feedback information according to the ACK/NACK indication information, receives and analyzes the ACK/NACK feedback information according to the total bit number, determines the total bit number to be 7 bits according to the ACK/NACK indication information and receives and obtains the 7-bit ACK/NACK feedback information according to the 7-bit information for the first and second implementation modes, so that the terminal can judge that the feedback information of the first 7 sTTIs is only fed back by the terminal actually, the terminal side of the last sTTI loses packets, and the base station determines the downlink short TTI needing to be retransmitted according to the ACK/NACK information and the judged packet loss condition; for the third implementation manner, the total bit number is determined to be 8 bits according to the ACK/NACK indication information, 8-bit ACK/NACK feedback information is received according to the 8-bit information, although the base station cannot judge whether the terminal loses packet at the end of scheduling, the tail occupied feedback information is NACK, the base station does not need to judge whether the terminal loses packet or not and performs retransmission processing according to NACK, and the base station can extract corresponding feedback information from the received ACK/NACK feedback information sequence according to actual scheduling (i.e., if the length of the ACK/NACK feedback information sequence exceeds ACK/NACK corresponding to downlink transmission actually scheduled by the base station, the tail feedback information is invalid and is not used), at this time, the base station considers that the 8-bit feedback information is valid information due to actual scheduling of 8 downlink transmissions, and respectively corresponds to 8 transmissions, and determines the downlink short TTI required to be retransmitted according to the ACK/NACK information, the 8 th bit feedback information is NACK, and although the base station cannot determine whether the terminal loses packet in the 8 th transmission, the base station may retransmit the 8 th transmission due to the occupied-bit NACK.

In table 5, more predefined values may be defined, and multiple values may be indicated by multiplexing the same binary state. However, for the multiplexing indication method of ACK/NACK indication information shown in table 4 (or when a method in which a plurality of values correspond to one binary state is also used in table 5), since it is assumed that 4 data packets are continuously lost by the terminal, which is a very small probability event, it is always assumed that the terminal does not continuously lose more than 4 data packets, and therefore, which value the multiplexing indication value is can be determined according to the total number of data packets scheduled by the base station itself. For example, in this embodiment, the base station itself schedules 8 downlink short TTI transmissions and needs to perform ACK/NACK feedback at the same time, and when the analyzed ACK/NACK indication information is "10", it can only be determined that the ACK/NACK indication information is not greater than 8 and not less than 8-4, which is 4, so that the ACK/NACK indication information can only be a value of "7" corresponding to the "10" state, and the following determination principle of multiple correspondences is the same as that described herein, and is not described here again.

TABLE 3 correspondence between the total number of ACK/NACK bits or the total number of downlink transmission bits and 4-bit binary transmission information

TABLE 4 corresponding relationship between the total number of ACK/NACK bits or the total number of downlink transmission bits and 2-bit binary transmission information

TABLE 5 corresponding relationship between the total number of ACK/NACK bits or the total number of downlink transmission bits and 2-bit binary transmission information

Second embodiment

As shown in fig. 6, the terminal is in a carrier aggregation operating mode, and is supposed to operate on two carriers, the base station side schedules 4 downlink short TTI transmissions on carrier 1 to perform ACK/NACK feedback at the same time, and assumes that each downlink short TTI has the same length and is 7 symbols, the base station schedules 8 downlink short TTI transmissions on carrier 2 to perform ACK/NACK feedback at the same time as the 4 downlink short TTI transmissions on carrier 1, and assumes that each downlink short TTI has the same length and is 2 symbols, a downlink control channel corresponding to each downlink short TTI transmission includes a 2-bit DAI, the DAI serves as a time domain counter, and a value exceeding 4 is cyclically indicated in a modulo 4 manner.

In this embodiment, the terminal receiving process is as follows:

the packet loss of the second downlink short TTI on the carrier 1 can be judged by the continuous DAI counter value that the packet loss exists at the position of the second downlink short TTI on the carrier 1, and the packet loss exists at the second downlink short TTIThe row short TTI generates NACK as feedback information. The terminal loses packet in the last 1 downlink short TTI scheduled by the base station on carrier 1, and the terminal cannot determine whether packet loss exists later according to the previous scheduling information. And the terminal determines the ACK/NACK feedback information according to the transmission mode and whether the space is combined or not according to the received downlink short TTI and the downlink short TTI for judging packet loss. For example, assuming that each downlink short TTI transmission is a single codeword transmission, 1-bit feedback information is generated for each received downlink short TTI and the downlink short TTI for determining packet loss, and 3-bit ACK/NACK feedback information o is obtained by sorting according to the sequence of the DAIcounter_1,1、o_1,2、o_1,3And the terminal side considers that only 3 downlink short TTI transmissions need to be subjected to ACK/NACK feedback on the carrier 1.

And the terminal determines ACK/NACK feedback information according to the received downlink short TTI and whether the transmission mode is spatial combination or not. For example, assuming that each downlink short TTI transmission is a single codeword transmission, 1-bit feedback information is generated for each received downlink short TTI and is ordered according to the DAI counter order to obtain 2-bit ACK/NACK feedback information o_2,1、o_2,2…o_2,6And the terminal side considers that only 6 downlink short TTI transmissions need to be subjected to ACK/NACK feedback on the carrier 2.

Specifically, the terminal determines the ACK/NACK indication information and the ACK/ANCK feedback information, which includes but is not limited to the following methods:

the method A comprises the following steps: the terminal determines that the ACK/NACK indication information includes a plurality of indication fields, where each indication field is used to indicate a total bit number of ACK/NACK feedback information of one carrier or a total downlink transmission number of one carrier, where the total number may be a number actually detected by the terminal, or may be a value that is selected from predetermined values and is closest to the actual number and is greater than the actual number, and specifically, specific implementation manners of the terminal determining the ACK/NACK indication information include, but are not limited to, the following:

the first implementation manner, similar to the first implementation manner in the first specific embodiment, is assumed to beEach carrier corresponds to 4-bit ACK/NACK indication information, a first ACK/NACK indication information indication field is used for indicating 3-bit ACK/NACK total feedback bit number or 3 total downlink transmission numbers of the carrier 1, a second ACK/NACK indication information indication field is used for indicating 6-bit ACK/NACK total feedback bit number or 6 total downlink transmission numbers of the carrier 2, the first ACK/NACK indication information is corresponding to '0010' and the second ACK/NACK indication information is corresponding to '0101' respectively according to the table 3 or a mode of directly converting the first ACK/NACK indication information and the second ACK/NACK indication information into 4-bit binary information, and the first ACK/NACK indication information and the second ACK/NACK indication information are cascaded together to be used as 8-bit transmission information '00100101' corresponding to the ACK/NACK indication information; the terminal concatenates the ACK/NACK feedback information of the carrier 1 and the carrier 2 to obtain 9-bit ACK/NACK feedback information o_1,1、o_1,2、o_1,3、o_2,1、o_2,2…o_2,6As actual transmitted ACK/NACK feedback information;

a second implementation manner, similar to the second implementation manner of the first specific embodiment, assuming that each carrier corresponds to 2-bit ACK/NACK indication information, the first ACK/NACK indication information indication field is used to indicate a 3-bit ACK/NACK total feedback bit number or 3 total downlink transmission numbers of carrier 1, the second ACK/NACK indication information indication field is used to indicate a 6-bit ACK/NACK total feedback bit number or 6 total downlink transmission numbers of carrier 2, according to table 4, it is obtained that the first ACK/NACK indication information corresponds to "10" and the second ACK/NACK indication information corresponds to "01", and the first and second ACK/NACK indication information are concatenated together as 4-bit transmission information "1001" corresponding to ACK/NACK indication information; the terminal concatenates the ACK/NACK feedback information of the carrier 1 and the carrier 2 to obtain 9-bit ACK/NACK feedback information o_1,1、o_1,2、o_1,3、o_2,1、o_2,2…o_2,6As actual transmitted ACK/NACK feedback information;

a third implementation manner, similar to the third implementation manner of the first embodiment, assuming that each carrier corresponds to 2-bit ACK/NACK indication information, and the actual 3-bit ACK/NACK total feedback bit number or 3 total downlink transmission bits for carrier 1 are assumed to be respectively transmittedThe number selection a2 ═ 8 as ACK/NACK indication information, the actual 6-bit ACK/NACK total feedback bit number or 6 total downlink transmission numbers of carrier 2, the number selection a2 ═ 8 as ACK/NACK indication information, according to table 5, the first ACK/NACK indication information corresponding to "01", the second ACK/NACK indication information corresponding to "01", and the first and second ACK/NACK indication information are concatenated together as 4-bit transmission information "0101" corresponding to ACK/NACK indication information; at this time, since the total number of bits of ACK/NACK or the total number of downlink transmissions of carrier 1 indicated by the ACK/NACK indication information is greater than the actual number of bits or the number of downlink transmissions, the 3-bit ACK/NACK feedback information o needs to be provided for the carrier 1_1,1、o_1,2、o_1,35-bit NACK is complemented at the tail end to obtain 8-bit ACK/NACK feedback information actually transmitted by the carrier wave 1, and 6-bit ACK/NACK feedback information o of the carrier wave 2_2,1、o_2,2…o_2,6And supplementing 2-bit NACK at the tail end to obtain 8-bit ACK/NACK feedback information actually transmitted by the carrier 2, and cascading the 8-bit ACK/NACK feedback information actually transmitted by the carrier 1 and the carrier 2 after the NACK is supplemented by the carrier 2 to obtain 16-bit ACK/NACK feedback information actually transmitted by the terminal.

The method B comprises the following steps: the terminal determines that the ACK/NACK indication information is used for indicating the total bit number of the ACK/NACK feedback information of each carrier or the maximum value a × N of the total downlink transmission number, where a ═ max (3, 6) ═ 6, and N ═ 2 is the number of aggregated carriers; the terminal determines that the actual ACK/NACK feedback bit number A corresponding to each carrier is max (3, 6) to 6, supplements 3-bit NACK for the ACK/NACK feedback information of the carrier 1, and then is cascaded with the ACK/NACK feedback information of the carrier 2 to be used as 12-bit ACK/NACK feedback information o of the terminal_1,1、o_1,2、o_1,3、NACK、NACK、NACK、o_2,1、o_2,2…o_2,6(ii) a Specifically, specific implementation manners of the terminal determining the ACK/NACK indication information include, but are not limited to, the following three:

a first implementation manner, similar to the first implementation manner of the first specific embodiment, obtains 4-bit transmission information "1011" corresponding to the ACK/NACK indication information according to table 3 or a manner of directly converting into 4-bit binary information; the terminal reverses the 12-bit ACK/NACKFeed information o_1,1、o_1,2、o_1,3、NACK、NACK、NACK、o_2,1、o_2,2…o_2,6As actual transmitted ACK/NACK feedback information;

a second implementation manner, similar to the second implementation manner of the first embodiment, obtains 2-bit transmission information "11" corresponding to the ACK/NACK indication information according to table 4; the terminal feeds back the 12-bit ACK/NACK feedback information o_1,1、o_1,2、o_1,3、NACK、NACK、NACK、o_2,1、o_2,2…o_2,6As actual transmitted ACK/NACK feedback information.

Corresponding to method a, the transmission mode of the ACK/NACK indication information is processed according to a specific procedure similar to

methods

1 and 2 in the first specific embodiment, and the only difference is that the bit number of the ACK/NACK feedback information sequence and the transmission bit number and specific content of the ACK/NACK indication information are different.

Corresponding to method B, the transmission mode of the ACK/NACK indication information is handled according to the specific procedures similar to

methods

1 and 2 in the first specific embodiment, and the only difference is that the bit number of the ACK/NACK feedback information sequence is different.

In this embodiment, the base station side receives and analyzes the ACK/NACK indication information according to a scheme corresponding to the terminal side, and receives and analyzes ACK/NACK feedback information according to a total bit number obtained by the ACK/NACK indication information (if the total downlink transmission number is indicated, the total bit number is determined according to the number of downlink transmissions, a transmission mode, and whether spatial combination is performed). The method comprises the following specific steps:

corresponding to method a: dividing 8-bit (corresponding to a first implementation mode) or 4-bit (corresponding to a second implementation mode and a third implementation mode) ACK/NACK indication information received according to a corresponding transmission scheme (a transmission scheme in which a terminal is consistent with a base station) into 2 parts according to the front and back sequence, and respectively obtaining the total number of ACK/NACK bits actually transmitted by each carrier; specifically, for the first and second implementations: if the total number of ACK/NACK bits or the total number of downlink transmissions of the carrier 1 obtained according to the first part of information is 3, the base station judges that the last downlink short TTI packet loss of the terminal on the carrier 1, and if the total number of ACK/NACK bits or the total number of downlink transmissions of the carrier 2 obtained according to the second part of information is 6, the base station judges that the last 2downlink short TTI packet losses of the terminal on the carrier 2; the base station determines that the total bit number or the total downlink transmission number of ACK/NACK feedback information of two carriers transmitted by the terminal is 3+6 to 9, receives and analyzes the ACK/NACK feedback information according to 9 bits, judges that the first 3 bits of ACK/NACK feedback information correspond to the first 3 downlink short TTIs on the carrier 1 for transmission, judges that the last 6 bits of ACK/NACK feedback information correspond to the first 6 downlink short TTIs on the carrier 2 for transmission, and determines the downlink short TTIs required to be retransmitted according to the ACK/NACK information and the judgment packet loss condition; for the third implementation: the total number of ACK/NACK bits or the total number of downlink transmissions of the carrier 1 obtained according to the first part of information is 8, the base station cannot judge the last packet loss condition of the terminal on the carrier 1, and because the base station only schedules 4 downlink transmissions on the carrier 1, the base station judges that only the first 4 bits in the ACK/NACK feedback information of the carrier 1 are valid, and the rest are occupied; the total number of bits of ACK/NACK or the total number of downlink transmissions of the carrier 2 obtained according to the second part of information is 8, the base station cannot judge the last packet loss situation of the terminal on the carrier 2, and since the base station schedules 8 downlink transmissions on the carrier 2, the base station judges that ACK/NACK feedback information of the carrier 2 is valid (namely, NACK placeholder information generated by the terminal is also used as feedback information, and downlink transmissions corresponding to the placeholder information either lose packets per se or do not exist per se, so that the correct correspondence of ACK/NACK is not influenced); the base station determines that the total bit number or the total downlink transmission number of ACK/NACK feedback information of two carriers transmitted by the terminal is 8+8 to 16, receives and analyzes the ACK/NACK feedback information according to 16 bits, judges that the first 8 bits of ACK/NACK feedback information correspond to a carrier 1, only takes the first 4 bits as effective ACK/NACK feedback information, respectively corresponds to 4 downlink transmissions on the carrier 1, and determines whether retransmission is needed according to the corresponding ACK/NACK information, because the 4 th bit of feedback information is NACK, the base station can not judge whether packet loss occurs at last, but can retransmit the 4 th transmission; after the judgment, the 8-bit ACK/NACK feedback information corresponds to the carrier 2, and the 8 bits are considered to be effective, and respectively correspond to 8 downlink short TTI transmissions on the carrier 2, whether retransmission is needed is determined according to the corresponding ACK/NACK information, and because the 7 th bit feedback information and the 8 th bit feedback information are NACK, although the base station cannot judge whether packet loss occurs at last, the 7 th transmission and the 8 th transmission are retransmitted.

Corresponding to method B: receiving 4-bit (corresponding to a first implementation mode) or 2-bit (corresponding to a second implementation mode) ACK/NACK indication information according to a corresponding transmission scheme (a transmission scheme in which a terminal is consistent with a base station), so as to obtain that the total bit number of ACK/NACK is 12, determining that the terminal feeds back 6-bit ACK/NACK feedback information to each carrier according to the principle that the actual bit numbers of the ACK/NACK feedback information of each carrier are the same, receiving and analyzing the ACK/NACK feedback information according to 12 bits, determining that the first 6 bits are feedback information of a carrier 1, and the last 6 bits are feedback information of a carrier 2. For carrier 1, because the base station actually schedules only 4 downlink short TTI transmissions, it determines that the last 2 bits are placeholder information and do not work, and because the terminal loses packet in the last downlink short TTI and the downlink short TTI corresponds to placeholder NACK information, although the base station cannot determine that the downlink short TTI loses packet, it retransmits the downlink short TTI. For carrier 2, since the base station actually schedules 8 downlink short TTI transmissions, it determines that the last 2downlink short TTIs have lost packets. And the base station determines the downlink short TTI needing to be retransmitted according to the ACK/NACK information and the judgment packet loss condition.

Third embodiment

As shown in fig. 7, a terminal is in a carrier aggregation operating mode, and is supposed to operate on 6 carriers, a short TTI transmission situation that needs to perform ACK/NACK feedback at the same time scheduled on each carrier by a base station side is as shown in fig. 7, it is supposed that each downlink short TTI has the same length and is 7 symbols, each downlink short TTI transmission is single-codeword transmission, a downlink control channel corresponding to each downlink short TTI transmission contains 2-bit C-DAI and 2-bit T-DAI, the C-DAI is used as a counter of a frequency domain first and a time domain later, the T-DAI indicates a total number of TTIs scheduled on all carriers up to a current short TTI, and values of the C-DAI and the T-DAI exceeding 4 are cyclically indicated in a modulo-4 manner, as shown in table 6 below.

TABLE 6 values of C-DAI and T-DAI

In this embodiment, the terminal receiving process is as follows:

receiving downlink transmissions on each carrier and short TTI, specifically, as shown in fig. 7, determining that packet losses exist at the second downlink short TTI on carriers 1 and 4 according to C-DAI, determining that 6 downlink transmissions are scheduled on all carriers in the first sTTI in total according to T-DAI ═ 2 in the first sTTI, determining that 11 downlink transmissions are scheduled on all carriers in total according to T-DAI value in the second sTTI being 3 and the number of downlink transmissions received on all carriers up to the second TTI, and determining that 11 downlink transmissions are scheduled on all carriers in total represented by T-DAI ═ 3, so that it can be determined that packet losses exist on the second sTTI on carrier 6; generating NACK as feedback information for the packet loss position; however, since the terminal does not receive any downlink transmission in the third sTTI, it cannot determine that the carrier 1 and the carrier 2 have packet loss in the third sTTI, and thus the bit number of the feedback information cannot be determined according to the total downlink transmission number 13 indicated by the last T-DAI ═ 1 actually scheduled by the base station; therefore, the terminal judges the position of packet loss according to the detected C-DAI and T-DAI and generates 11-bit ACK/NACK feedback information, and the ACK/NACK feedback information is sequenced according to the increasing sequence of the C-DAI, namely the feedback information of a first sTTI carrier 1, the feedback information of a first sTTI carrier 2, the feedback information of a first … sTTI carrier 6, the feedback information of a second sTTI carrier 1, the feedback information of a second sTTI carrier 3 and the feedback information of a … second sTTI carrier 6; the terminal side considers that only the 11 downlink short TTI transmissions need to be subjected to ACK/NACK feedback.

The ACK/NACK indication information indicates a total ACK/NACK feedback bit number transmitted by the terminal, or a detected total downlink transmission number, or a value of a detected last T-DAI, or a total number of ACK/NACK feedback information determined according to the detected last T-DAI, and determines the total bit number or the total downlink transmission number of the ACK/NACK information transmitted by the ACK/NACK indication information indicating terminal, where the total number may be a number actually detected by the terminal, or may be a value selected from predetermined values that is closest to the actual number and is greater than the actual number, and the specific implementation manner is as follows:

a first implementation manner, similar to the first implementation manner of the first specific embodiment, the binary bit number corresponding to the ACK/NACK indication information is agreed in advance, as shown in table 3, table 3 is looked up to obtain a binary transmission sequence corresponding to the actually generated total bit number 11, or the actually detected total downlink transmission number 11, or the total downlink transmission number 11 indicated by the last T-DAI value, or the total ACK/ANCK feedback bit number 11 determined by the last T-DAI value of the constellation, which is "1010", or the binary transmission sequence may be directly converted into a binary value after subtracting 1 from 11, and the binary value is supplemented with 0 at high order to obtain a 4-bit transmission sequence "1010".

The second implementation manner, similar to the second implementation manner of the first specific embodiment, assumes that 2-bit binary information is always used to represent ACK/NACK indication information, as shown in table 4, so as to obtain a binary transmission sequence "10" corresponding to the total number of actually generated bits 11, or the total number of actually detected downlink transmissions 11, or the total number of downlink transmissions 11 indicated by the last T-DAI value, or the total ACK/ANCK feedback bits 11 determined by the last T-DAI, or may directly use the T-DAI value or the binary state as ACK/NACK indication information (because the definition manner of the T-DAI in this case is consistent with table 4).

In a third implementation manner, similar to the third implementation manner of the first specific embodiment, a plurality of ACK/NACK total bit values or total downlink transmission values that may be indicated by the ACK/NACK indication information are predefined, as shown in table 5, a value closest to and greater than the above-mentioned actually generated total bit number 11, or the actually detected total downlink transmission number 11, or the total downlink transmission number 11 indicated by the last T-DAI value, or the total ACK/ANCK feedback bit number 11 determined by the last T-DAI configuration is selected, then a3 is selected to be 12, and the 2-bit ACK/NACK indication information is obtained to be "10". At this time, since the total number of bits of ACK/NACK or the total number of downlink transmissions indicated by the ACK/NACK indication information is greater than the actual number of bits or the actual number of downlink transmissions, it is necessary to complement 1-bit NACK at the end of the generated 11-bit ACK/NACK feedback information to obtain 12-bit ACK/NACK feedback information as ACK/NACK feedback information actually transmitted by the terminal.

The transmission mode of the ACK/NACK indication information is processed according to a specific procedure similar to the method 1 and the method 2 in the first specific embodiment, and the only difference is that the bit number of the ACK/NACK feedback information sequence and the specific content of the ACK/NACK indication information are different.

In the specific embodiment, the base station side receives and analyzes the ACK/NACK indication information according to a scheme corresponding to the terminal side, determines the total bit number of ACK/NACK feedback information according to the ACK/NACK indication information, receives and analyzes the ACK/NACK feedback information according to the total bit number, determines the total bit number to be 11 bits according to the ACK/NACK indication information and receives and obtains 11-bit ACK/NACK feedback information according to 11-bit information for the first and second implementation modes, so that the terminal can judge that only the feedback information of the first 11 sTTIs is actually fed back by the terminal, the last 2 sTTI terminal sides lose packets, and the base station determines the downlink short TTI needing to be retransmitted according to the ACK/NACK information and the judged packet loss condition; for the third implementation manner, the total bit number is determined to be 12 bits according to the ACK/NACK indication information, 12-bit ACK/NACK feedback information is received according to 12-bit information, because the base station actually schedules 13 downlink transmissions, and if the terminal receives one downlink transmission on any carrier in the last sTTI, the total number of downlink transmissions can be determined to be 13 according to the T-DAI therein, but because the terminal feeds back 12 downlink transmissions, the base station can determine that 2downlink transmissions in the last sTTI have lost packets, and for the remaining downlink transmissions, determine whether to retransmit according to the received corresponding ACK/ANCK feedback information.

In the above three specific embodiments, only 1RB is occupied by the sPUCCH frequency domain, the sPUCCH frequency domain occupies more RBs, or occupies the frequency domain resources in a manner of other frequency domain resource units, and similarly, the sPUCCH may also use other symbol lengths different from those in the above specific embodiments, and details are not repeated here.

The above three embodiments are applicable to both FDD and TDD systems. If the system is an FDD system, downlink sTTI transmission and uplink sPUCCH feedback are performed on different frequency domain resources, and if the system is a TDD system, the downlink sTTI transmission and the uplink sPUCCH feedback are performed on the same frequency domain resource by Time Division Multiplexing (TDM). In the above two specific embodiments, the downlink sTTI on each carrier only takes one sTTI length as an example, and it is also possible that ACK/NACK feedback information of downlink transmission with different sTTI lengths is fed back in the same sPUCCH, and the processing manner is the same as above.

In the above three embodiments, only downlink short TTI single codeword transmission is taken as an example. If the transmission is multi-code word transmission and space combination is not used, each downlink short TTI corresponds to 2-bit ACK/NACK feedback information and corresponds to each transmission block respectively. If the transmission is multi-code word transmission and space combination is used, each downlink short TTI corresponds to 1-bit ACK/NACK feedback information, and logical AND is carried out on the feedback information of each transmission block. If each ACK/NACK feedback information carries a time stamp, such as a subframe/TTI number, a carrier number, a process number and the like, an ACK/NACK sequence can be generated according to the time stamp sequence to replace the ACK/NACK sequence generated according to the DAI counter sequence, and other processes are the same;

in the above three specific embodiments, only taking as an example that each downlink transmission is a single codeword, therefore, the ACK/NACK indication information indicates that the total bit number of ACK/NACK and the total downlink transmission number are the same in value; if each downlink transmission or part of the downlink transmissions are multiple codewords and no spatial combination is used, the ACK/NACK indication information may determine the total downlink transmission number according to specific detection conditions (i.e., the number of actually received downlink transmissions and the number of judged packet losses) if indicating that the total downlink transmission number is smaller than the total number of ACK/NACK bits in terms of value, then obtaining ACK/NACK indication information according to the corresponding table, the total bit number of ACK/NACK is determined according to the number of transmission blocks indicated by each downlink transmission and whether the transmission blocks are spatially combined or not, if 2 transport blocks are supported and spatial combining is not used, each downlink transmission corresponds to 2-bit ACK/NACK feedback information, if 2 transport blocks are supported and spatial combining is used, each downlink transmission corresponds to 1-bit ACK/NACK feedback information, the 1-bit information is obtained by logically and-ing ACK/NACK feedback information of 2 transport blocks.

Based on the same inventive concept, the embodiment of the present invention further provides a terminal, and specific implementation of the terminal may refer to the description of the method embodiment, and repeated details are not described again, as shown in fig. 8, the terminal mainly includes:

a processing module 801, configured to determine ACK/NACK indication information, where the ACK/NACK indication information at least includes information used for determining a bit number of ACK/NACK feedback information transmitted by the terminal;

a reporting module 802, configured to report the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information.

In a possible implementation, the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same transmission time interval TTI;

or, the ACK/NACK indication information is transmitted in a transmission time interval TTI ahead of the ACK/NACK feedback information.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the reporting module is specifically configured to:

determining a first channel resource for transmitting the ACK/NACK indication information, and transmitting the ACK/NACK indication information on the first channel resource;

and determining a second channel resource for transmitting the ACK/NACK feedback information, and transmitting the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In a possible implementation manner, the reporting module is specifically configured to:

acquiring the first channel resource pre-configured by a network side through a high-level signaling;

or, acquiring a first channel resource set pre-configured by a network side through a high-level signaling, and determining at least one first channel resource in the first channel resource set according to a bit field in a downlink control channel.

In a possible embodiment, the processing module is specifically configured to:

generating ACK/NACK feedback information according to a Downlink Allocation Index (DAI) corresponding to downlink transmission for feeding back the ACK/NACK feedback information at the same time; or

And generating the ACK/NACK feedback information according to the TTI number and/or the process number and/or the carrier number of the downlink transmission which feeds back the ACK/NACK feedback information at the same time.

In a possible embodiment, the processing module is specifically configured to:

Based on the same inventive concept, the embodiment of the present invention further provides a base station, and the specific implementation of the base station may refer to the description of the method embodiment, and repeated details are not repeated, as shown in fig. 9, the base station mainly includes:

a first receiving module 901, configured to receive ACK/NACK indication information reported by a terminal, where the ACK/NACK indication information at least includes information used for determining a bit number of ACK/NACK feedback information transmitted by the terminal;

a second receiving module 902, configured to receive, according to the ACK/NACK indication information, ACK/NACK feedback information reported by the terminal.

In a possible implementation manner, if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the first receiving module is specifically configured to:

determining a first channel resource for transmitting the ACK/NACK indication information, and receiving the ACK/NACK indication information on the first channel resource;

the second receiving module is specifically configured to:

and determining a second channel resource for transmitting the ACK/NACK feedback information, and receiving the ACK/NACK feedback information on the second channel resource, wherein the first channel resource is different from the second channel resource.

In a possible implementation manner, the second receiving module is specifically configured to:

In a possible implementation manner, when the base station determines that the ACK/NACK indication information indicates one of a plurality of bits of ACK/NACK feedback information predefined by or preconfigured by a higher layer signaling and is not less than the number of bits of the ACK/NACK feedback information, or that the ACK/NACK indication information indicates one of a plurality of total downlink transmissions predefined by or preconfigured by a higher layer signaling and is not less than the total downlink transmissions corresponding to the ACK/NACK feedback information, the second receiving module is specifically configured to:

when the base station determines that the ACK/NACK indication information indicates a product of a maximum value of bit numbers of ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, or that the ACK/NACK indication information indicates a product of a maximum value of a total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, the second receiving module is specifically configured to:

In a possible embodiment, when there is a physical downlink shared channel that does not have a corresponding downlink control channel and needs to perform ACK/NACK feedback, the second receiving module is specifically configured to:

and determining that the total number of ACK/NACK bits indicated by the ACK/NACK indication information includes the number of bits of ACK/ANCK feedback information of the physical downlink shared channel or the total number of downlink transmissions includes the physical downlink shared channel.

Based on the same inventive concept, another terminal is further provided in the embodiments of the present invention, and specific implementation of the terminal may refer to description of the method embodiment, and repeated parts are not repeated, as shown in fig. 10, the terminal mainly includes a processor 1001, a memory 1002, and a transceiver 1003, where the transceiver receives and transmits data under control of the processor, the memory stores a preset program, and the processor reads the program in the memory and executes the following processes according to the program:

determining ACK/NACK indication information, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal;

and reporting the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information through a transceiver.

In implementation, the processor executes the relevant processes described in the method embodiments to implement the corresponding functions, and reference is specifically made to the description of the method embodiments, and this is not repeated here.

Based on the same inventive concept, another base station is further provided in the embodiments of the present invention, and specific implementation of the base station may refer to description of the method embodiment, and repeated parts are not repeated, as shown in fig. 11, the base station mainly includes a processor 1101, a memory 1102, and a transceiver 1103, where the transceiver receives and transmits data under control of the processor, the memory stores a preset program, and the processor reads the program in the memory and executes the following processes according to the program:

receiving ACK/NACK (acknowledgement/negative acknowledgement) indication information reported by a terminal through a transceiver, wherein the ACK/NACK indication information at least comprises information used for determining the bit number of ACK/NACK feedback information transmitted by the terminal;

and indicating the transceiver to receive the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information.

Where in fig. 10 and 11 the processors, memories and transceivers are connected by a bus, the bus architecture may include any number of interconnected buses and bridges, with one or more of the processors represented by the processors and the various circuits of the memories represented by the memories being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver may be a plurality of elements, i.e., including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus architecture and the usual processing, and the memory may store data used by the processor in performing operations.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An ACK/NACK feedback information transmission method is characterized by comprising the following steps:

2. The method of claim 1, wherein the ACK/NACK indication information is transmitted in a same transmission time interval, TTI, as the ACK/NACK feedback information;

3. The method of claim 1, wherein the ACK/NACK indication information is transmitted in the same channel or a different channel than the ACK/NACK feedback information.

4. The method according to any of claims 1-3, wherein if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information occupy different time domain and frequency domain resources, respectively, to be transmitted independently on the same channel.

5. The method of any one of claims 1 to 3, wherein if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the reporting, by the terminal, of the ACK/NACK indication information and the ACK/NACK feedback information corresponding to the ACK/NACK indication information comprises:

6. The method of claim 5, wherein a channel format for transmitting the ACK/NACK indication information is the same as or different from a channel format for transmitting the ACK/NACK feedback information.

7. The method of claim 5, wherein the terminal determining a first channel resource for transmitting the ACK/NACK indication information comprises:

the terminal acquires the first channel resource pre-configured by a network side through a high-level signaling;

or, the terminal acquires a first channel resource set pre-configured by a network side through a high-level signaling, and determines at least one first channel resource in the first channel resource set according to a bit field in a downlink control channel.

8. The method according to any of claims 1-3, wherein the ACK/NACK indication information is used to indicate a total number of bits of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal;

9. The method of claim 8, wherein if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the determining, by the terminal, the ACK/NACK indication information specifically includes:

the terminal generates ACK/NACK feedback information, and takes the bit number of the ACK/NACK feedback information as the ACK/NACK indication information, or takes the total downlink transmission number corresponding to the ACK/NACK feedback information as the ACK/NACK indication information; or

10. The method of claim 9, wherein the generating the ACK/NACK feedback information by the terminal, or the generating the ACK/NACK feedback information by the terminal for each aggregation/active carrier, specifically comprises:

11. The method of claim 9, wherein the generating of the ACK/NACK feedback information by the terminal selects, as the ACK/NACK indication information, one value that is not less than the number of bits of the ACK/NACK feedback information among a plurality of predefined bits of ACK/NACK feedback information or a plurality of predefined total downlink transmissions or a plurality of total downlink transmissions corresponding to the ACK/NACK feedback information, as the ACK/NACK indication information, comprises:

12. The method of claim 9, wherein when there is a physical downlink shared channel (pdcch) not corresponding to the downlink control channel and ACK/NACK feedback is required, the total number of bits of ACK/NACK or the total number of downlink transmissions indicated by the ACK/NACK indication information is increased by 1.

13. An ACK/NACK feedback information transmission method is characterized by comprising the following steps:

14. The method of claim 13, wherein the ACK/NACK indication information is transmitted in a same transmission time interval, TTI, as the ACK/NACK feedback information;

15. The method of claim 13, wherein the ACK/NACK indication information is transmitted in the same channel or a different channel than the ACK/NACK feedback information.

16. The method according to any of claims 13-15, wherein if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information occupy different time and frequency resources, respectively, for independent transmission on the same channel.

17. The method of any one of claims 13 to 15, wherein if the ACK/NACK indicator and the ACK/NACK feedback information are transmitted in different channels, the receiving, by the base station, the ACK/NACK indicator reported by the terminal, and receiving, according to the ACK/NACK indicator, the ACK/NACK feedback information reported by the terminal includes:

18. The method of claim 17, wherein a channel format for transmitting the ACK/NACK indication information is the same as or different from a channel format for transmitting the ACK/NACK feedback information.

19. The method of claim 17, wherein the base station determining a first channel resource for transmitting the ACK/NACK indication information comprises:

20. The method according to any of claims 13-15, wherein the ACK/NACK indication information is used to indicate a total number of bits of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal;

21. The method of claim 20, wherein if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the receiving, by the base station, the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information specifically includes:

if the ACK/NACK indication information indicates the total bit number of the ACK/NACK feedback information on each carrier in the aggregation/activation carriers of the terminal or the total downlink transmission number corresponding to the ACK/NACK feedback information on each carrier in the aggregation/activation carriers of the terminal, the receiving, by the base station, the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information specifically includes:

the base station determines that the ACK/NACK indication information contains indication information of each aggregation/activation carrier corresponding to the terminal, and the indication information of one aggregation/activation carrier corresponding to the terminal indicates the bit number of ACK/NACK feedback information of one aggregation/activation carrier or the indication information of one aggregation/activation carrier corresponding to the terminal indicates the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier; or

22. The method of claim 21, wherein the base station determines that the terminal generates ACK/NACK feedback information as follows:

23. The method of claim 21, wherein when the base station determines that the ACK/NACK indication information indicates one of a plurality of predefined or preconfigured bits of ACK/NACK feedback information for higher layer signaling that is not less than the bits of the ACK/NACK feedback information, or the ACK/NACK indication information indicates one of a plurality of predefined or preconfigured total downlink transmissions for higher layer signaling that is not less than the total downlink transmissions corresponding to the ACK/NACK feedback information, the base station receives, according to the ACK/NACK indication information, the ACK/NACK feedback information reported by the terminal, specifically including:

when the base station determines that the ACK/NACK indication information indicates a product of a maximum value of bit numbers of ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, or that the ACK/NACK indication information indicates a product of a maximum value of a total downlink transmission number corresponding to the ACK/NACK feedback information of each aggregation/active carrier and the number of aggregation/active carriers, the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information, which specifically includes:

when the base station determines that the ACK/NACK indication information includes indication information of each aggregation/activation carrier corresponding to the terminal, the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the bit number of the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of bit numbers of ACK/NACK feedback information predefined or preconfigured by a high-level signaling, or the indication information of one aggregation/activation carrier corresponding to the terminal indicates one value, which is not less than the total downlink transmission number corresponding to the ACK/NACK feedback information of the one aggregation/activation carrier, in a plurality of total downlink transmission numbers predefined or preconfigured by a high-level signaling, the base station receives the ACK/NACK feedback information reported by the terminal according to the ACK/NACK indication information, the method specifically comprises the following steps:

24. The method of claim 21, wherein when there is a physical downlink shared channel that does not have a corresponding downlink control channel and requires ACK/NACK feedback, the base station determines that the total number of ACK/NACK bits indicated by the ACK/NACK indication information includes the number of bits of ACK/ANCK feedback information of the physical downlink shared channel or the total number of downlink transmissions includes the physical downlink shared channel.

25. A terminal, comprising:

26. The terminal of claim 25, wherein the ACK/NACK indication information is transmitted in a same transmission time interval, TTI, as the ACK/NACK feedback information;

27. The terminal of claim 25, wherein the ACK/NACK indication information is transmitted in the same channel or a different channel than the ACK/NACK feedback information.

28. The terminal according to any of claims 25-27, wherein if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information occupy different time and frequency resources, respectively, for independent transmission on the same channel.

29. The terminal according to any of claims 25 to 27, wherein if the ACK/NACK indicator information and the ACK/NACK feedback information are transmitted in different channels, the reporting module is specifically configured to:

30. The terminal of claim 29, wherein a channel format for transmitting the ACK/NACK indication information is the same as or different from a channel format for transmitting the ACK/NACK feedback information.

31. The terminal of claim 29, wherein the reporting module is specifically configured to:

32. The terminal according to any of claims 25-27, wherein the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal;

33. The terminal of claim 32, wherein if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the processing module is specifically configured to:

34. The terminal of claim 33, wherein the processing module is specifically configured to:

35. The terminal of claim 33, wherein the processing module is specifically configured to:

36. The terminal of claim 33, wherein when there is a physical downlink shared channel that does not have a corresponding downlink control channel and requires ACK/NACK feedback, the total number of bits of ACK/NACK or the total number of downlink transmissions indicated by the ACK/NACK indication information is increased by 1.

37. A base station, comprising:

38. The base station of claim 37, wherein the ACK/NACK indication information is transmitted in a same transmission time interval, TTI, as the ACK/NACK feedback information;

39. The base station of claim 37, wherein the ACK/NACK indication information is transmitted in the same channel or a different channel than the ACK/NACK feedback information.

40. The base station according to any of claims 37-39, wherein if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in the same channel, the ACK/NACK indication information and the ACK/NACK feedback information occupy different time domain and frequency domain resources, respectively, and are independently transmitted in the same channel.

41. The base station according to any of claims 37 to 39, wherein if the ACK/NACK indication information and the ACK/NACK feedback information are transmitted in different channels, the first receiving module is specifically configured to:

the second receiving module is specifically configured to:

42. The base station of claim 41, wherein a channel format for transmitting the ACK/NACK indication information is the same as or different from a channel format for transmitting the ACK/NACK feedback information.

43. The base station of claim 41, wherein the first receiving module is specifically configured to:

44. The base station of any one of claims 37 to 39, wherein the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal;

45. The base station of claim 44, wherein if the ACK/NACK indication information is used to indicate a total bit number of the ACK/NACK feedback information reported by the terminal or a total number of downlink transmissions corresponding to the ACK/NACK feedback information reported by the terminal, the second receiving module is specifically configured to:

46. The base station of claim 45, wherein the second receiving module is specifically configured to:

47. The base station of claim 45, wherein when the base station determines that the ACK/NACK indication information indicates one of a plurality of predefined or preconfigured bits of ACK/NACK feedback information for higher layer signaling that is not less than the number of bits of the ACK/NACK feedback information, or that the ACK/NACK indication information indicates one of a plurality of predefined or preconfigured total downlink transmissions for higher layer signaling that is not less than the total downlink transmissions corresponding to the ACK/NACK feedback information, the second receiving module is specifically configured to:

48. The base station of claim 45, wherein when there is a physical downlink shared channel that does not have a corresponding downlink control channel and requires ACK/NACK feedback, the second receiving module is specifically configured to: