CN107231222B

CN107231222B - Transmission method and device of feedback information

Info

Publication number: CN107231222B
Application number: CN201610179913.3A
Authority: CN
Inventors: 司倩倩; 高雪娟; 郑方政; 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: 2016-03-25
Filing date: 2016-03-25
Publication date: 2020-04-10
Anticipated expiration: 2036-03-25
Also published as: CN107231222A

Abstract

The invention discloses a transmission method and a device of feedback information, which are used for solving the problem that in the prior art, when downlink data are transmitted by adopting flexible and variable TTI length, an explicit implementation scheme is not provided at present for transmitting ACK/NACK feedback information of the downlink data. The method comprises the following steps: the method comprises the steps that a first terminal determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes; and the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe, so that the normal feedback of the ACK/NACK information of the downlink transmission can be supported when the TTI of the downlink transmission is variable.

Description

Transmission method and device of feedback information

Technical Field

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

Background

An existing Long Term Evolution (LTE) Frequency Division Duplex (FDD) system uses a Frame Structure type 1 (FS 1), and the Structure of the Frame Structure type 1 is shown in fig. 1. In an FDD system, different carriers are used for uplink and downlink transmissions, both using the same frame structure. On each carrier, a 10ms long radio frame contains 101 ms subframes, each divided into two 0.5ms long slots. The length of a Transmission Time Interval (TTI) for transmitting uplink and downlink data is 1 ms.

The conventional LTE Time Division Duplex (TDD) system uses an FS2 frame structure, as shown in fig. 2. In a TDD system, uplink and downlink transmissions use different subframes or different time slots on the same frequency. Each 10ms long radio frame in FS2 is made up of two 5ms long half-frames, each containing 51 ms long subframes. Subframes in FS2 are divided into three categories: each special subframe comprises a Downlink transmission Time Slot (DwPTS), a Guard Period (GP) and an Uplink transmission Time Slot (UpPTS). Wherein, the DwPTS can transmit downlink pilot frequency, downlink service data and downlink control information; the GP does not transmit any signal; the UpPTS transmits only a random access and Sounding Reference Signal (SRS), and cannot transmit uplink service data 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 configurations (Uplink-downlink configurations)

In the LTE release 8(Rel-8) system, for the FDD system, since there is uplink resource in each subframe, ACK/NACK information of the downlink subframe numbered n is transmitted in the 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 value K in the set can determine a downlink subframe (i.e., the downlink subframe numbered n-K including the special subframe) that 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 values of different uplink subframes and different TDD uplink and downlink configuration K are not necessarily the same.

TABLE 2TDD Downlink related K value set { K₀,k₁,…k_M-1}

The numbers in table 2 are subframes numbered n-k in units of radio frames, and if n-k is less than 0, it indicates a subframe in the previous radio frame.

With the development and change of the mobile communication service demand, various organizations such as international telecommunications Union (ITU for short) define higher user plane delay performance requirements for future mobile communication systems. One of the main methods to shorten user time-delay performance is to reduce the TTI length. When downlink data are transmitted by adopting flexible and variable TTI length, no clear implementation scheme exists for how the ACK/NACK feedback information of the downlink data is transmitted at present.

Disclosure of Invention

The embodiment of the invention provides a method and a device for transmitting feedback information, which are used for solving the problem that in the prior art, when downlink data are transmitted by adopting a flexible and variable TTI length, an explicit implementation scheme is not provided at present for transmitting ACK/NACK feedback information of the downlink data.

In a first aspect, a method for sending feedback information includes:

the method comprises the steps that a first terminal determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes;

and the first terminal transmits the ACK/NACK information in a feedback resource of the feedback subframe, wherein the feedback resource is used for transmitting feedback information.

In one possible implementation, the first feedback timing relationship satisfies the following condition:

the feedback subframe is a first subframe which comprises at least one feedback resource and has a time interval with the end position of the subframe where the downlink transmission is located, wherein the time interval is greater than k times the length of the TTI of the downlink transmission, and k is a positive integer; or

The feedback subframe is a subframe after a first subframe which contains at least one feedback resource and has a time interval with the end position of the subframe where the downlink transmission is located, wherein the time interval is greater than k times of the length of the TTI of the downlink transmission, and k is a positive integer.

In one possible implementation, the first feedback timing relationship at least includes:

the length of a downlink transmission TTI in a subframe n is 14 OFDM symbols, and a feedback subframe where ACK/NACK information corresponding to downlink transmission is located is n + 4; or

The length of a downlink transmission TTI in a subframe n is 7 OFDM symbols, and a feedback subframe where ACK/NACK information corresponding to downlink transmission is located is n + 3; or

The length of downlink transmission TTI in the subframe n is 3 or 4 OFDM symbols, and the feedback subframe where the downlink transmission corresponding to the ACK/NACK information is located is n + 2; or

The length of downlink transmission TTI in the subframe n is 1 or 2 OFDM symbols, and the feedback subframe where the downlink transmission corresponding to the ACK/NACK information is located is n + 1.

In a possible implementation manner, before the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe, the method further includes:

the first terminal receives indication information sent by a network side;

and the first terminal determines the feedback resources used by the ACK/NACK information in the feedback sub-frame according to the indication information.

and the first terminal determines the feedback resources used by the ACK/NACK information in the feedback sub-frame according to a second feedback time sequence relation, wherein the second feedback time sequence relation comprises the corresponding relation among the length of the TTI of the downlink transmission, the sub-frame where the downlink transmission is located, the position of the downlink transmission in the sub-frame where the downlink transmission is located and the feedback resources used by the ACK/NACK information corresponding to the downlink transmission.

In a possible implementation manner, the transmitting, by the first terminal, the ACK/NACK information in the feedback resource of the feedback subframe includes:

the first terminal and the second terminal adopt a time division multiplexing mode to transmit the ACK/NACK information in different feedback resources of the feedback subframe; or

The first terminal and the second terminal adopt a frequency division multiplexing mode to transmit the ACK/NACK information in different feedback resources of the feedback subframe; or

And the first terminal and the second terminal adopt a code division multiplexing mode to transmit the ACK/NACK information in different feedback resources of the feedback subframe.

the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe through a Physical Uplink Control Channel (PUCCH); or

And the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe through a Physical Uplink Shared Channel (PUSCH).

In a second aspect, a method for receiving feedback information includes:

the network side determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes;

and the network side receives ACK/NACK information transmitted by a terminal in the feedback resources of the feedback sub-frame, and the feedback resources are used for transmitting the feedback information.

For the first feedback timing relationship, reference is specifically made to the related description in the first aspect, and details are not repeated here.

In a possible implementation, the method further includes:

and the network side sends indication information to the terminal, wherein the indication information is used for indicating feedback resources used by the ACK/NACK information in the feedback subframe.

In a possible implementation manner, before the network side receives ACK/NACK information transmitted by a terminal in a feedback resource of the feedback subframe, the method further includes:

and the network side determines a feedback resource used by the ACK/NACK information in the feedback subframe according to a second feedback time sequence relation, wherein the second feedback time sequence relation comprises the corresponding relation among the length of the TTI of the downlink transmission, the subframe where the downlink transmission is located, the position of the downlink transmission in the subframe where the downlink transmission is located and the feedback resource used by the ACK/NACK information corresponding to the downlink transmission.

In a possible implementation manner, the receiving, by the network side, ACK/NACK information sent by a terminal in a feedback resource of the feedback subframe includes:

the network side receives ACK/NACK information transmitted by different terminals in a time division multiplexing mode in different feedback resources of the feedback sub-frame; or

The network side receives ACK/NACK information transmitted by different terminals in a frequency division multiplexing mode in different feedback resources of the feedback sub-frame; or

And the network side receives ACK/NACK information transmitted by different terminals in a code division multiplexing mode in different feedback resources of the feedback sub-frame.

In a possible implementation manner, the receiving, by the network side, ACK/NACK information transmitted by a terminal in a feedback resource of the feedback subframe includes:

the network side receives ACK/NACK information transmitted by the terminal in a feedback resource of the feedback subframe through a Physical Uplink Control Channel (PUCCH); or

And the network side receives the ACK/NACK information transmitted by the terminal in the feedback resource of the feedback subframe through a Physical Uplink Shared Channel (PUSCH).

In a third aspect, an apparatus for transmitting feedback information includes:

the determining module is used for determining a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes;

a sending module, configured to transmit the ACK/NACK information in a feedback resource of the feedback subframe, where the feedback resource is used to transmit feedback information.

In a possible implementation manner, the apparatus further includes:

the receiving module is used for receiving the indication information sent by the network side;

the determining module is further configured to determine, according to the indication information, a feedback resource used by the ACK/NACK information in the feedback subframe.

In a possible implementation manner, the determining module is further configured to:

and determining feedback resources used by the ACK/NACK information in the feedback sub-frame according to a second feedback time sequence relation, wherein the second feedback time sequence relation comprises the corresponding relation among the length of the TTI of the downlink transmission, the sub-frame where the downlink transmission is located, the position of the downlink transmission in the sub-frame where the downlink transmission is located and the feedback resources used by the ACK/NACK information corresponding to the downlink transmission.

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

transmitting the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a time division multiplexing mode with a second terminal; or

Transmitting the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a frequency division multiplexing mode with a second terminal; or

And transmitting the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a code division multiplexing mode with the second terminal.

transmitting the ACK/NACK information in the feedback resources of the feedback sub-frame through a Physical Uplink Control Channel (PUCCH); or

And transmitting the ACK/NACK information in the feedback resources of the feedback sub-frame through a Physical Uplink Shared Channel (PUSCH).

In a fourth aspect, an apparatus for receiving feedback information includes:

and the receiving module is used for receiving the ACK/NACK information transmitted by the terminal in the feedback resources of the feedback sub-frame, and the feedback resources are used for transmitting the feedback information.

In a possible implementation manner, the apparatus further includes:

and a sending module, configured to send indication information to the terminal, where the indication information is used to indicate a feedback resource used by the ACK/NACK information in the feedback subframe.

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

receiving ACK/NACK information transmitted by different terminals in a time division multiplexing mode in different feedback resources of the feedback sub-frame; or

Receiving ACK/NACK information transmitted by different terminals in a frequency division multiplexing mode in different feedback resources of the feedback subframe; or

And receiving ACK/NACK information transmitted by different terminals in a code division multiplexing mode in different feedback resources of the feedback sub-frame.

receiving ACK/NACK information transmitted by the terminal in a feedback resource of the feedback subframe through a Physical Uplink Control Channel (PUCCH); or

And receiving the ACK/NACK information transmitted by the terminal in the feedback resource of the feedback subframe through a Physical Uplink Shared Channel (PUSCH).

In a fifth aspect, a terminal comprises a transceiver and at least one processor coupled to the transceiver, wherein:

a processor for reading the program in the memory, performing the following processes:

determining a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes; controlling the transceiver to transmit the ACK/NACK information in a feedback resource of the feedback subframe, wherein the feedback resource is used for transmitting feedback information;

a transceiver for receiving and transmitting data under the control of the processor.

In one possible implementation, the transceiver is further configured to: receiving indication information sent by a network side;

the processor reads the program in the memory and further executes: and determining the feedback resources used by the ACK/NACK information in the feedback sub-frame according to the indication information.

In one possible implementation, the processor reads the program in the memory and further executes:

controlling the transceiver to transmit the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a time division multiplexing mode with a second terminal; or

Controlling the transceiver to transmit the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a frequency division multiplexing mode with a second terminal; or

And the second terminal controls the transceiver to transmit the ACK/NACK information in different feedback resources of the feedback sub-frame in a code division multiplexing mode.

controlling the transceiver to transmit the ACK/NACK information in a feedback resource of the feedback subframe through a PUCCH; or

And controlling the transceiver to transmit the ACK/NACK information in a feedback resource of the feedback subframe through a PUSCH.

In a sixth aspect, a base station includes a transceiver and at least one processor coupled to the transceiver, wherein:

determining a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes; controlling the transceiver to receive ACK/NACK information transmitted by a terminal in feedback resources of the feedback sub-frame, wherein the feedback resources are used for transmitting feedback information;

As a possible implementation, the processor reads the program in the memory and further executes:

and controlling the transceiver to send indication information to the terminal, wherein the indication information is used for indicating feedback resources used by the ACK/NACK information in the feedback subframe.

As another possible implementation manner, the processor reads the program in the memory, and further executes:

Based on any of the above embodiments, the processor reads the program of the memory, and specifically executes:

controlling the transceiver to receive ACK/NACK information transmitted by different terminals in a time division multiplexing mode in different feedback resources of the feedback sub-frame; or

Controlling the transceiver to receive ACK/NACK information transmitted by different terminals in a frequency division multiplexing mode in different feedback resources of the feedback sub-frame; or

And controlling the transceiver to receive ACK/NACK information transmitted by different terminals in a code division multiplexing mode in different feedback resources of the feedback sub-frame.

Based on any of the above embodiments, the processor reads the program in the memory, and specifically executes:

controlling the transceiver to receive ACK/NACK information transmitted by the terminal in a feedback resource of the feedback subframe through a PUCCH; or

And controlling the transceiver to receive the ACK/NACK information transmitted by the terminal in the feedback resource of the feedback subframe through a PUSCH.

In the method and the device provided by the embodiment of the invention, based on the first feedback time sequence relationship, the terminal can determine the feedback subframe for transmitting the ACK/NACK information corresponding to the downlink transmission according to the length of the TTI of the downlink transmission and the subframe where the downlink transmission is located, and transmit the ACK/NACK information in the feedback resource of the feedback subframe. The feedback subframe for transmitting the ACK/NACK information corresponding to the downlink transmission can be determined according to the lengths of the TTIs of different downlink transmissions, so that the normal feedback of the ACK/NACK information of the downlink transmission can be supported when the TTI of the downlink transmission is variable.

Drawings

Fig. 1 is a diagram illustrating a frame structure in an FDD system;

FIG. 2 is a diagram of a frame structure in a TDD system;

fig. 3 is a schematic flowchart of a method for sending feedback information according to an embodiment of the present invention;

FIG. 4A is a diagram illustrating a first possible first feedback timing relationship according to an embodiment of the present invention;

FIG. 4B is a diagram illustrating a second possible first feedback timing relationship according to an embodiment of the present invention;

FIG. 4C is a diagram illustrating a third possible first feedback timing relationship according to an embodiment of the present invention;

FIG. 4D is a diagram illustrating a fourth possible first feedback timing relationship according to an embodiment of the present invention;

fig. 5 is a schematic flowchart of a method for receiving feedback information according to an embodiment of the present invention;

FIG. 6 is a timing diagram of embodiment 1 according to the present invention;

FIG. 7 is a timing diagram of embodiment 2 of the present invention;

FIG. 8 is a timing diagram of embodiment 3 of the present invention;

FIG. 9 is a timing diagram of embodiment 4 of the present invention;

fig. 10 is a schematic diagram of an apparatus for sending feedback information according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a terminal provided in an embodiment of the present invention;

fig. 12 is a schematic diagram of a device for receiving feedback information according to an embodiment of the present invention;

fig. 13 is a schematic diagram of a base station according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 techniques described herein may be used in various communication systems, such as current 2G, 3G, 4G communication systems and next generation communication systems (e.g., 5G), such as Global System for mobile communications (GSM), Code Division Multiple Access (CDMA, Code Division Multiple Access) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) systems, Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency-Division Multiple Access) systems, SC-FDMA systems, General packet radio Service (GPRS, General packet Access) systems, Long Term Evolution (LTE), Long Term Evolution (Evolution) systems, and other communication systems.

For explaining the technical scheme of the present invention, the words "first" and "second" are used to distinguish different terminals, but the number of terminals and the operation priority are not limited, the first terminal represents any terminal in the communication network, and the second terminal represents any terminal in the communication network different from the first terminal.

The first terminal and the second terminal in the embodiments of the present invention may be a wireless terminal and a wired terminal, and the wireless terminal may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio access network (e.g., RAN). For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like.

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto. It is to be understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

In an embodiment of the present invention, a method for sending feedback information is provided, as shown in fig. 3, the method includes:

s31, the first terminal determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a transmission time interval TTI of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes.

S32, the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe, and the feedback resource is used for transmitting feedback information.

In the embodiment of the present invention, based on the first feedback timing relationship, the first terminal may determine, according to the length of the TTI of the downlink transmission and the subframe where the downlink transmission is located, a feedback subframe for transmitting ACK/NACK information corresponding to the downlink transmission, and transmit the ACK/NACK information in a feedback resource of the feedback subframe. The feedback subframe for transmitting the ACK/NACK information corresponding to the downlink transmission can be determined according to the lengths of the TTIs of different downlink transmissions, so that the normal feedback of the ACK/NACK information of the downlink transmission can be supported when the TTI of the downlink transmission is variable.

In the embodiment of the present invention, the first feedback timing relationship satisfies the following condition:

The feedback subframe is a subframe behind a first subframe which comprises at least one feedback resource and has a time interval with the end position of the subframe where the downlink transmission is located, wherein the time interval is greater than k times of the length of the TTI of the downlink transmission, and k is a positive integer.

Four possible implementations of the corresponding relationship between the TTI length of the downlink transmission, the subframe where the downlink transmission is located, and the feedback subframe where the ACK/NACK information corresponding to the downlink transmission is located are listed below:

1. the length of downlink transmission TTI in the subframe n is 14 OFDM symbols, and the feedback subframe where the downlink transmission corresponding to the ACK/NACK information is located is n + 4.

Correspondingly, if the first terminal determines that the TTI length of the downlink transmission is 14 OFDM symbols and the subframe in which the downlink transmission is located is the subframe n, the first terminal determines that the feedback subframe in which the ACK/NACK information corresponding to the downlink transmission is located is n +4, as shown in fig. 4A.

2. The length of downlink transmission TTI in the subframe n is 7 OFDM symbols, and the feedback subframe where the downlink transmission corresponding to the ACK/NACK information is located is n + 3.

Correspondingly, if the first terminal determines that the TTI length of the downlink transmission is 7 OFDM symbols and the subframe in which the downlink transmission is located is the subframe n, the first terminal determines that the feedback subframe in which the ACK/NACK information corresponding to the downlink transmission is located is n +3, as shown in fig. 4B.

3. The length of downlink transmission TTI in the subframe n is 3 or 4 OFDM symbols, and the feedback subframe where the downlink transmission corresponding to the ACK/NACK information is located is n + 2.

Correspondingly, if the first terminal determines that the TTI length of the downlink transmission is 3 or 4 OFDM symbols and the subframe where the downlink transmission is located is the subframe n, the first terminal determines that the feedback subframe where the ACK/NACK information corresponding to the downlink transmission is located is n +2, as shown in fig. 4C.

4. The length of downlink transmission TTI in the subframe n is 1 or 2 OFDM symbols, and the feedback subframe where the downlink transmission corresponding to the ACK/NACK information is located is n + 1.

Correspondingly, if the first terminal determines that the TTI length of the downlink transmission is 1 or 2 OFDM symbols and the subframe where the downlink transmission is located is the subframe n, the first terminal determines that the feedback subframe where the ACK/NACK information corresponding to the downlink transmission is located is n +1, as shown in fig. 4D.

In the embodiment of the present invention, a first subframe, which preferably includes at least one feedback resource and has a time interval with the end position of the subframe where the downlink transmission is located, which is greater than k times the length of the TTI of the downlink transmission is used as the feedback subframe.

Further, if a first subframe which includes at least one feedback resource and has a time interval with the end position of the subframe where the downlink transmission is located that is greater than k times the length of the TTI of the downlink transmission cannot perform uplink transmission, a feedback subframe is a subframe which first meets the requirement after the first subframe and includes at least one feedback resource and has a time interval with the end position of the subframe where the downlink transmission is located that is greater than k times the length of the TTI of the downlink transmission.

In this embodiment of the present invention, the feedback subframe includes at least one feedback resource, and each feedback resource may occupy N OFDM symbols, where N is a positive integer greater than or equal to 1 and less than 14.

Optionally, when the feedback subframe includes at least two feedback resources, the time lengths of different feedback resources may be the same or different; the number of frequency bands occupied by different feedback resources may be the same or different.

Optionally, the time length of the feedback resource in the feedback subframe may be the same as or different from the length of the corresponding TTI of the downlink transmission.

Optionally, when determining the feedback resource used by the downlink transmission corresponding to the ACK/NACK information, the terminal may adopt the following two possible implementation manners:

in the first mode, the network side dynamically notifies the first terminal of the feedback resource used by the downlink transmission of the corresponding ACK/NACK information through a signaling, and correspondingly, the first terminal determines the feedback resource used by the downlink transmission of the corresponding ACK/NACK information in the feedback subframe according to the signaling sent by the network side, which specifically includes the following steps:

the first terminal receives downlink scheduling information sent by a network side;

and the first terminal determines feedback resources used by the ACK/NACK information in the feedback sub-frame according to the downlink scheduling signaling.

In this way, the network side can flexibly schedule the feedback resources to transmit the ACK/NACK information corresponding to the downlink transmission.

And in the second mode, the length of the TTI of the downlink transmission and the subframe where the downlink transmission is located implicitly indicate the feedback resource used by the ACK/NACK information corresponding to the downlink transmission, that is, the terminal and the network side are pre-configured with a second feedback time sequence relationship, wherein the second feedback time sequence relationship comprises the corresponding relationship among the length of the TTI of the downlink transmission, the subframe where the downlink transmission is located, the position of the subframe where the downlink transmission is located, and the feedback resource used by the ACK/NACK information corresponding to the downlink transmission. The method comprises the following specific steps:

and the first terminal determines feedback resources used by the ACK/NACK information in the feedback sub-frame according to a preset second feedback time sequence relation.

The position of the downlink transmission in the subframe where the downlink transmission is located is specifically a first OFDM symbol occupied by the downlink transmission in the subframe where the downlink transmission is located.

Based on any of the above embodiments, the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe, including the following three possible multiplexing modes:

in the mode 1, the first terminal and the second terminal adopt a time division multiplexing mode, and the ACK/NACK information is transmitted in different feedback resources of the feedback subframe.

And in the mode 2, the first terminal and the second terminal adopt a frequency division multiplexing mode, and the ACK/NACK information is transmitted in different feedback resources of the feedback subframe.

And in the mode 3, the first terminal and the second terminal adopt a code division multiplexing mode, and the ACK/NACK information is transmitted in different feedback resources of the feedback subframe.

Based on any of the above embodiments, the first terminal transmits the ACK/NACK information in the feedback resource of the feedback subframe, including the following two possible transmission modes:

And the first terminal transmits the ACK/NACK information in a feedback resource of the feedback subframe through a Physical Uplink Shared Channel (PUSCH for short).

Based on the same inventive concept, the embodiment of the present invention further provides a method for receiving feedback information, as shown in fig. 5, the method includes:

s51, the network side determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of TTI of the downlink transmission, the subframe where the downlink transmission is located and the corresponding relation between the feedback subframes;

s52, the network side receives ACK/NACK information transmitted by the terminal in the feedback resource of the feedback sub-frame, and the feedback resource is used for transmitting the feedback information.

For the first feedback timing relationship, please refer to the related description in the embodiment shown in fig. 3, which is not repeated herein.

As an implementation, the method further comprises:

Specifically, when scheduling downlink transmission, the network side dynamically notifies the terminal of the feedback resources used by the ACK/NACK information in the feedback subframe through a downlink scheduling signaling.

As another implementation manner, before the network side receives ACK/NACK information transmitted by a terminal in a feedback resource of the feedback subframe, the method further includes:

Based on any of the above embodiments, the receiving, by the network side, ACK/NACK information sent by the terminal in the feedback resource of the feedback subframe includes:

Based on any of the above embodiments, the receiving, by the network side, ACK/NACK information transmitted by the terminal in the feedback resource of the feedback subframe includes:

The following four specific embodiments are provided to describe in detail the transmission method of ACK/NACK information according to the embodiments of the present invention.

Example 1: in this embodiment, the carriers aggregated by the terminal are all FDD carriers, and a conventional CP is used. Suppose that the base station transmits downlink data with a TTI length of 14 OFDM symbols in subframe n, transmits downlink data with a TTI length of 7 OFDM symbols in subframe n +1, transmits downlink data with a TTI length of 3 or 4 OFDM symbols in subframe n +2, and transmits downlink data with a TTI length of 1 or 2 OFDM symbols in subframe n + 3. According to the predefined downlink feedback timing sequence, the ACK/NACK information corresponding to these downlink data is fed back in subframe n +4, as shown in fig. 6.

Because the subframe n +4 includes multiple feedback resources, the base station may pre-configure multiple resources to the terminal through a Radio resource control (RRC for short) signaling, and notify, when scheduling downlink transmission, the feedback resource used by ACK/NACK information corresponding to current downlink transmission through a downlink scheduling signaling. In this embodiment, the base station indicates the same feedback resource in the downlink scheduling signaling in the subframe n, the subframe n +1, the subframe n +2, and the subframe n +3, the feedback resource occupies 7 OFDM symbols, and the time interval between the corresponding TTI of downlink transmission is greater than k × TTI (where k takes the value of 3).

Example 2: in this embodiment, the carriers aggregated by the terminal are all FDD carriers, and a conventional CP is used. Suppose that the base station transmits downlink data of 3 TTI lengths to the terminal in subframe n: according to the predefined downlink feedback time sequence, the ACK/NACK information corresponding to the downlink data with the TTI length of 7 OFDM symbols is fed back in the subframe n +3, the ACK/NACK information corresponding to the downlink data with the TTI length of 4 OFDM symbols is fed back in the subframe n +2, and the ACK/NACK information corresponding to the downlink data with the TTI length of 1 OFDM symbol is fed back in the subframe n +1, as shown in fig. 7.

The base station can pre-configure a plurality of resources for the terminal through RRC signaling, and inform the feedback resources corresponding to the current transmission through downlink scheduling signaling when scheduling downlink transmission. In this embodiment, the feedback resources indicated in the downlink scheduling signaling in different TTIs of the subframe n by the base station are different, the indicated feedback resources occupy 7 OFDM symbol lengths, and the time interval between corresponding TTIs of downlink transmission is greater than k × TTI (where k is 3).

Example 3: in this embodiment, the carriers aggregated by the terminal are all FDD carriers, and a conventional CP is used. Assuming that the base station transmits downlink data with 2 types of TTI lengths to the terminal A in the subframe n, according to a predefined feedback timing sequence, ACK/NACK information corresponding to the downlink data with the TTI length of 7 OFDM symbols is fed back in the subframe n +3, and ACK/NACK information corresponding to the downlink data with the TTI length of 1 OFDM symbol is fed back in the subframe n + 1. The base station further transmits downlink data with TTI length of 2 OFDM symbols to the terminal B in the subframe n, and then according to the predefined feedback timing, ACK/NACK feedback corresponding to the downlink data with TTI length of 2 OFDM symbols is fed back in the subframe n +1, as shown in fig. 8.

If the terminal a and the terminal B receive the downlink data in the subframe n, feedback needs to be performed in the subframe n + 1. The base station pre-configures a plurality of resources for the terminal A and the terminal B through RRC signaling, and notifies feedback resources corresponding to current transmission through downlink scheduling signaling when downlink transmission is scheduled. In this embodiment, the TTI length for ACK/NACK feedback by the terminal is the same as the TTI length for downlink transmission, in subframe n +1, terminal a uses TTI of 1 OFDM symbol length for ACK/NACK feedback, and terminal B uses TTI of 2 OFDM symbol length for ACK/NACK feedback, at this time, terminal a and terminal B may have overlapping Resource Blocks (RBs) and are code-division multiplexed on these RBs.

Example 4: in this embodiment, the carriers aggregated by the terminal are TDD carriers, a conventional CP is adopted, TDD uplink and downlink configuration 2 is used, and TDD special subframe configuration 7 is assumed (that is, DwPTS includes 10 symbols, GP is 2 symbols, and UpPTS includes 2 symbols).

Assuming that the base station transmits downlink data with a TTI length of 14 OFDM symbols in subframe 0, the terminal should perform feedback in subframe 4 according to a predefined downlink feedback timing sequence, but subframe 4 is a downlink subframe, and finds a first subframe containing feedback resources after subframe 4, that is, subframe 7 (assuming that 2 uplink OFDM symbols in subframe 6 cannot be used for transmitting ACK/NACK information), so the feedback subframe should be subframe 7, as shown in fig. 9;

the base station transmits downlink data with the TTI length of 7 OFDM symbols in the subframe 1, and then the terminal should perform feedback in the subframe 4 according to a predefined downlink feedback timing sequence, and similarly, the subframe 4 is a downlink subframe, and a first subframe including ACK/NACK feedback resources after the subframe 4, that is, the subframe 7 (assuming that 2 uplink OFDM symbols in the subframe 6 cannot be used for transmitting ACK/NACK), is searched for, and therefore, the feedback subframe should be the subframe 7, as shown in fig. 9;

the base station also transmits downlink data with TTI length of 1 OFDM symbol in subframe 1, and then according to a predefined downlink feedback timing, the terminal should perform feedback in subframe 2, where subframe 2 is an uplink subframe and contains ACK/NACK feedback resources, and thus the feedback subframe should be subframe 2, as shown in fig. 9.

The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, the embodiment of the present invention further provides a device for sending feedback information, and since the principle of the device for solving the problem is similar to that of a sending method of feedback information shown in fig. 3, the implementation of the terminal may refer to the implementation of the method, and repeated parts are not described again.

As shown in fig. 10, an apparatus for sending feedback information according to an embodiment of the present invention includes:

a determining module 1001, configured to determine a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback timing relationship, where the first correspondence relationship includes a correspondence relationship between a transmission time interval TTI of the downlink transmission, a subframe where the downlink transmission is located, and the feedback subframe;

a sending module 1002, configured to transmit the ACK/NACK information in a feedback resource of the feedback subframe, where the feedback resource is used for transmitting feedback information.

In a possible implementation manner, the terminal further includes:

transmitting the ACK/NACK information in a feedback resource of the feedback subframe through a PUCCH; or

And transmitting the ACK/NACK information in the feedback resources of the feedback sub-frame through a PUSCH.

An embodiment of the present invention further provides a terminal, where the terminal includes the apparatus in any one of the embodiments shown in fig. 10.

The structure and processing method of the terminal according to the embodiment of the present invention will be described below with reference to a preferred hardware structure.

In the embodiment of fig. 11, the terminal comprises a transceiver 1101, and at least one processor 1102 connected to the transceiver 1101, wherein:

a processor 1102, configured to read a program in the memory 1103, and execute the following processes:

determining a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes; controlling the transceiver 1101 to transmit the ACK/NACK information in a feedback resource of the feedback subframe, the feedback resource being used for transmitting feedback information;

a transceiver 1101 for receiving and transmitting data under the control of the processor 1102.

Where, in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1102, and various circuits, represented by the memory 1103, 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 1101 may be a plurality of elements including a transmitter and a receiver providing a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1104 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1102 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1102 in performing operations.

In one possible implementation, the transceiver 1101 is further configured to: receiving indication information sent by a network side;

the processor 1102 reads the program in the memory 1103 and also performs: and determining the feedback resources used by the ACK/NACK information in the feedback sub-frame according to the indication information.

In one possible implementation, the processor 1102 reads the program in the memory 1103 and further executes:

controlling the transceiver 1101 to transmit the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a time division multiplexing mode with a second terminal; or

Controlling the transceiver 1101 to transmit the ACK/NACK information in different feedback resources of the feedback sub-frame by adopting a frequency division multiplexing mode with a second terminal; or

And the second terminal controls the transceiver 1101 to transmit the ACK/NACK information in different feedback resources of the feedback subframe by using a code division multiplexing mode.

controlling the transceiver 1101 to transmit the ACK/NACK information in a feedback resource of the feedback subframe through a PUCCH; or

Controlling, by a PUSCH, the transceiver 1101 to transmit the ACK/NACK information in a feedback resource of the feedback subframe.

Based on the same inventive concept, the embodiment of the present invention further provides a device for receiving feedback information, and since the principle of the terminal for solving the problem is similar to that of a method for receiving feedback information shown in fig. 5, the implementation of the device may refer to the implementation of the method, and repeated details are not repeated.

As shown in fig. 12, an apparatus for receiving feedback information according to an embodiment of the present invention includes:

a determining module 1201, configured to determine a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback timing relationship, where the first correspondence relationship includes a correspondence relationship between a length of a transmission time interval TTI of the downlink transmission, a subframe where the downlink transmission is located, and the feedback subframe;

a receiving module 1202, configured to receive, in a feedback resource of the feedback subframe, ACK/NACK information transmitted by a terminal, where the feedback resource is used for transmitting feedback information.

As a possible implementation manner, the apparatus further includes:

As another possible implementation manner, the determining module is further configured to:

Based on any of the above embodiments, the receiving module is specifically configured to:

An embodiment of the present invention further provides a network-side device, where the network-side device includes any one of the apparatuses in the embodiments shown in fig. 12.

The following describes a structure and a processing manner of a network side device according to an embodiment of the present invention, by taking the network side device as a base station as an example, and combining a preferred hardware structure.

In the embodiment of fig. 13, the base station comprises a transceiver 1301, and at least one processor 1302 connected to the transceiver 1301, wherein:

the processor 1302 is configured to read the program in the memory 1303, and execute the following processes:

determining a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first corresponding relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes; in the feedback resources of the feedback subframe, the transceiver 1301 is controlled to receive ACK/NACK information transmitted by a terminal, where the feedback resources are used for transmitting feedback information;

a transceiver 1301 for receiving and transmitting data under the control of the processor 1302.

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1302, and various circuits, represented by memory 1303, 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 1301 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1302 is responsible for managing the bus architecture and general processing, and the memory 1303 may store data used by the processor 1302 in performing operations.

As a possible implementation manner, the processor 1302 reads the program in the memory 1303, and further executes:

and controlling the transceiver 1301 to send indication information to the terminal, where the indication information is used to indicate a feedback resource used by the ACK/NACK information in the feedback subframe.

As another possible implementation manner, the processor 1302 reads the program in the memory 1303, and further performs:

Based on any of the above embodiments, the processor 1302 reads the program in the memory 1303, and specifically executes:

controlling the transceiver 1301 to receive ACK/NACK information transmitted by different terminals in a time division multiplexing mode in different feedback resources of the feedback subframe; or

Controlling the transceiver 1301 to receive ACK/NACK information transmitted by different terminals in a frequency division multiplexing mode in different feedback resources of the feedback subframe; or

And controlling the transceiver 1301 to receive the ACK/NACK information transmitted by different terminals in a code division multiplexing manner in different feedback resources of the feedback subframe.

controlling the transceiver 1301 to receive, through a PUCCH, ACK/NACK information transmitted by the terminal in a feedback resource of the feedback subframe; or

And controlling the transceiver 1301 to receive, through a PUSCH, ACK/NACK information transmitted by the terminal in the feedback resource of the feedback subframe.

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, CD-ROM, 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.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

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. A method for sending feedback information, the method comprising:

the method comprises the steps that a first terminal determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first feedback time sequence relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between feedback subframes;

2. The method of claim 1, wherein the first feedback timing relationship satisfies the following condition:

3. The method of claim 2, wherein the first feedback timing relationship comprises at least:

4. The method of any of claims 1-3, wherein the first terminal transmits the ACK/NACK information in a feedback resource of the feedback subframe, the method further comprising:

the first terminal receives indication information sent by a network side;

5. The method of any of claims 1-3, wherein the first terminal transmits the ACK/NACK information in a feedback resource of the feedback subframe, the method further comprising:

6. The method of any of claims 1 to 3, wherein the first terminal transmitting the ACK/NACK information in feedback resources of the feedback subframe comprises:

7. The method of any of claims 1 to 3, wherein the first terminal transmitting the ACK/NACK information in feedback resources of the feedback subframe comprises:

8. A method for receiving feedback information, the method comprising:

the network side determines a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first feedback time sequence relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes;

9. The method of claim 8, wherein the first feedback timing relationship satisfies the following condition:

10. The method of claim 8, wherein the first feedback timing relationship comprises at least:

11. The method of any one of claims 8 to 10, further comprising:

12. The method according to any one of claims 8 to 10, wherein the network side receives ACK/NACK information transmitted by a terminal in a feedback resource of the feedback subframe, and the method further comprises:

13. The method according to any one of claims 8 to 10, wherein the receiving, by the network side, ACK/NACK information sent by a terminal in the feedback resource of the feedback subframe includes:

14. The method according to any one of claims 8 to 10, wherein the receiving, by the network side, ACK/NACK information transmitted by a terminal in the feedback resource of the feedback subframe comprises:

15. An apparatus for transmitting feedback information, the apparatus comprising:

the determining module is used for determining a feedback subframe for transmitting ACK/NACK information corresponding to downlink transmission according to a first feedback time sequence relation, wherein the first feedback time sequence relation comprises the length of a Transmission Time Interval (TTI) of the downlink transmission, a subframe where the downlink transmission is located and the corresponding relation between the feedback subframes;

16. The apparatus of claim 15, wherein the first feedback timing relationship satisfies the following condition:

17. The apparatus as recited in claim 16, wherein said first feedback timing relationship comprises at least:

18. The apparatus of any of claims 15 to 17, further comprising:

19. The apparatus of any of claims 15-17, wherein the determination module is further configured to:

20. The apparatus according to any one of claims 15 to 17, wherein the sending module is specifically configured to:

21. The apparatus according to any one of claims 15 to 17, wherein the sending module is specifically configured to:

22. An apparatus for receiving feedback information, the apparatus comprising:

23. The apparatus of claim 22, wherein the first feedback timing relationship satisfies the following condition:

24. The apparatus as recited in claim 23, wherein said first feedback timing relationship comprises at least:

25. The apparatus of any one of claims 22 to 24, further comprising:

26. The apparatus of any of claims 22-24, wherein the determination module is further configured to:

27. The apparatus according to any one of claims 22 to 24, wherein the receiving module is specifically configured to:

28. The apparatus according to any one of claims 22 to 24, wherein the receiving module is specifically configured to: