WO2018028300A1

WO2018028300A1 - Ack/nack feedback method, device and system

Info

Publication number: WO2018028300A1
Application number: PCT/CN2017/088274
Authority: WO
Inventors: 司倩倩; 潘学明; 高雪娟
Original assignee: 电信科学技术研究院
Priority date: 2016-08-12
Filing date: 2017-06-14
Publication date: 2018-02-15
Also published as: CN107733579B; CN107733579A

Abstract

Disclosed in the present invention are an acknowledgement/negative acknowledgement (ACK/NACK) feedback method, device and system, used to solve the problem in existing technology wherein misunderstanding occurs between a base station and a terminal for ACK/NACK that is fedback. The method comprises: indicating that transmission time intervals (TTIs) of different lengths use different ACK/NACK feedback resources to feedback; and receiving feedback information for a TTI of each length on a corresponding ACK/NACK feedback resource according to the indication. As a base station instructs a terminal to perform feedback using an ACK/NACK feedback resource corresponding to each length of transmission time interval (TTI) and to receive feedback information on the indicated resource, misunderstanding is thereby avoided for feedback ACK/NACK between a base station and a terminal.

Description

ACK/NACK feedback method, device and system

The present application claims priority to Chinese Patent Application No. 201610666541.7, filed on Aug. 12, 2016, entitled "A ACK/NACK Feedback Method, Apparatus and System", the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of mobile communications technologies, and in particular, to a method, an apparatus, and a system for acknowledging information ACK/non-acknowledgment information NACK.

Background technique

With the development of mobile communication technology, the International Telecommunications Organization (ITU) defines higher user delay performance requirements for mobile communication systems. In order to meet the delay performance of the user, the main method now is to shorten part of the transmission time interval (TTI). , Transmission Time Interval). After the partial TTI is shortened, TTIs of different lengths appear in the system, and when the acknowledgment information (ACK)/non-confirmation information (NACK) codebook size is determined according to the TTI of different lengths, there are certain problems in the prior art. After the partial TTI is shortened, dynamic signaling may be used to indicate the transmission location of the feedback information. There is no corresponding feedback information transmission method in the prior art, and thus the feedback information cannot be transmitted between the base station and the terminal.

Summary of the invention

The embodiment of the present invention provides an ACK/NACK feedback method, device, and system, which are used to solve the problem of misunderstanding of feedback ACK/NACK between a base station and a terminal in the prior art.

To achieve the above objective, an embodiment of the present invention discloses an ACK/NACK feedback method, which is applied to a base station, and the method includes:

Instructing different lengths of transmission time intervals TTI to use different ACK/NACK feedback resources for feedback;

And for each length of TTI, according to the indication, receiving feedback information on the corresponding ACK/NACK feedback resource.

Optionally, the indicating that the transmission time interval TTI of different lengths uses different ACK/NACK feedback resources for feedback includes:

The information of the ACK/NACK feedback resource used by the currently scheduled TTI is indicated by the downlink scheduling signaling, where the ACK/NACK feedback resources used by the TTIs of different lengths are different.

Optionally, when the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of TTIs on different carriers are different, the transmission time interval TTI indicating different lengths uses different ACK/NACK feedback resources. Feedback includes:

The carriers of the TTIs with different lengths are divided into different carrier groups by using the high-level signaling, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups; or

The length of the TTI on each carrier is indicated by the high layer signaling, so that the terminal divides the carriers of the TTIs with different lengths into different carrier groups, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups. .

Optionally, using different ACK/NACK feedback resources in the different uplink feedback carrier groups for feedback includes:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.

Optionally, the ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.

An embodiment of the present invention provides an ACK/NACK feedback method, which is applied to a terminal, and the method includes:

Receiving, by the base station, different lengths of transmission time intervals, TTIs, using different ACK/NACK feedback resources for feedback information;

For each length of TTI, feedback is performed on the corresponding ACK/NACK feedback resource according to the indication.

Optionally, the information that the different length of the transmission time interval TTI indicated by the receiving base station uses different ACK/NACK feedback resources for feedback includes:

Receiving, by the base station, information about an ACK/NACK feedback resource used by a currently scheduled TTI by using downlink scheduling signaling, where ACK/NACK feedback resources used by different lengths of TTIs are different.

Optionally, when the multi-carrier transmission is performed, and there is only one length of TTI on each carrier, and the lengths of TTIs on different carriers are different, the transmission time intervals TTI of different lengths indicated by the receiving base station are different. The information fed back by the ACK/NACK feedback resource includes:

Receiving, by the base station, the carriers that have different lengths of TTIs are allocated to different carrier groups, and the different uplink feedback carrier groups use different ACK/NACK feedback resources for feedback; or

Receiving, by the base station, the length of the TTI on each carrier indicated by the high layer signaling, and dividing the carriers of the TTIs having different lengths into different carrier groups according to the length of the TTI on each carrier, and different uplinks Different ACK/NACK feedback resources are used in the feedback carrier group for feedback.

Further, the different ACK/NACK feedback resources corresponding to the TTIs with different lengths are time division resources, frequency division resources, or code division resources.

The embodiment of the invention provides an ACK/NACK feedback device, which is applied to a base station, and the device includes:

An indication module, configured to indicate that different lengths of transmission time intervals TTI use different ACK/NACK feedback resources for feedback;

The first receiving module is configured to receive the feedback information on the corresponding ACK/NACK feedback resource according to the indication for the TTI of each length.

Optionally, the indication module is specifically configured to:

When the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the carriers with different lengths of TTIs are divided into different carrier groups by different high-level signaling indications, and different uplinks are used. The feedback carrier group uses different ACK/NACK feedback resources for feedback; or the high-level signaling indicates the length of the TTI on each carrier, so that the terminal divides the carriers with different lengths of TTI into different carrier groups, Different ACK/NACK feedback resources are used in different uplink feedback carrier groups for feedback.

Optionally, the indication module is specifically configured to:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or the feedback information of different carrier groups are fed back on different ACK/NACK feedback resources on the same carrier.

Optionally, the indication module is specifically configured to:

The ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources or code division resources.

The embodiment of the invention provides an ACK/NACK feedback device, which is applied to a terminal, and the device includes:

a first receiving module, configured to receive information that the different length of the transmission time interval TTI indicated by the base station uses different ACK/NACK feedback resources for feedback;

The feedback module is configured to perform feedback on the corresponding ACK/NACK feedback resource according to the indication for each length of TTI.

Optionally, the first receiving module is specifically configured to:

When the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the receiving base station divides carriers with different lengths of TTIs indicated by higher layer signaling into different ones. a carrier group, in which different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups; or receiving a length of a TTI on each carrier indicated by the high-layer signaling by the base station, according to the TTI on each carrier The carrier of the TTIs with different lengths is divided into different carrier groups, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups.

Optionally, the first receiving module is specifically configured to:

The embodiment of the present invention provides an ACK/NACK feedback system, which includes the ACK/NACK feedback device applied to the base station as described above, and the ACK/NACK feedback device applied to the terminal as described above.

The embodiment of the present invention provides an acknowledgement information ACK/non-acknowledgement NACK feedback apparatus, which is applied to a base station, and the apparatus includes:

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

Instructing different lengths of transmission time intervals TTI to use different ACK/NACK feedback resources for feedback; and for each length of TTI, receiving feedback information on corresponding ACK/NACK feedback resources according to the indication;

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

Optionally, the processor is specifically configured to:

Optionally, the ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.

An embodiment of the present invention provides an acknowledgement information ACK/non-acknowledgement NACK feedback apparatus, which is applied to a terminal, and the apparatus includes:

Receiving, by the transceiver, information of different lengths of transmission time intervals TTI indicated by the base station using different ACK/NACK feedback resources for feedback; for each length of TTI, performing feedback on the corresponding ACK/NACK feedback resource according to the indication ;

Optionally, the processor is specifically configured to:

Receiving, by the transceiver, the information indicating the ACK/NACK feedback resource used by the currently scheduled TTI by the base station by using the downlink scheduling signaling, where the ACK/NACK feedback resources used by the TTIs of different lengths are different.

Optionally, the processor is specifically configured to:

An embodiment of the present invention provides an ACK/NACK feedback method, apparatus, and system. The method includes: the base station instructs different lengths of transmission time intervals TTI to use different ACK/NACK feedback resources for feedback; and for each length of TTI, According to the indication, the feedback information is received on the corresponding ACK/NACK feedback resource. Since the base station indicates that the transmission time interval TTI of different lengths of the terminal uses different ACK/NACK feedback resources for feedback for each length of transmission time interval TTI, and receives feedback information on the corresponding ACK/NACK feedback resource, the base station and the terminal are avoided. There is a misunderstanding between the feedback ACK/NACK.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Skill For the person skilled in the art, other drawings can be obtained from these drawings without any creative work.

1 is a schematic diagram of a first ACK/NACK feedback process according to Embodiment 1 of the present invention;

2A-2D are diagrams of carrier transmission provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a second ACK/NACK feedback process according to an embodiment of the present invention;

4 is a schematic structural diagram of an ACK/NACK feedback apparatus applied to a base station according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an ACK/NACK feedback apparatus applied to a terminal according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an ACK/NACK feedback system according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a second ACK/NACK feedback apparatus applied to a base station according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a second ACK/NACK feedback apparatus applied to a terminal according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1:

FIG. 1 is a schematic diagram of an ACK/NACK feedback process according to an embodiment of the present invention, where the process includes the following steps:

S101: Instructing different lengths of transmission time intervals TTI to use different ACK/NACK feedback resources for feedback.

The ACK/NACK feedback method provided by the embodiment of the present invention is applied to a base station. The base station can identify the length of the transmission time interval TTI, and use the different ACK/NACK feedback resources to perform feedback according to different transmission time intervals TTI indicating the length of the transmission time interval TTI, so that the terminal feeds back according to the indicated feedback resources.

S102: And for each length of the TTI, receive feedback information on the corresponding ACK/NACK feedback resource according to the indication.

The base station instructs the terminal to use the corresponding feedback resources for the TTI of each length to perform feedback. At the same time, the base station must receive the feedback information on the corresponding ACK/NACK feedback resource according to the indication, in order to receive the corresponding feedback information.

The ACK/NACK feedback resource is one of the following:

Since the base station indicates that the transmission time interval TTI of different lengths of the terminal uses different ACK/NACK feedback resources for feedback for each length of transmission time interval TTI, and receives feedback information on the corresponding ACK/NACK feedback resource, the base station and the terminal are avoided. There is a misunderstanding between the feedback ACK/NACK.

The reporting of the transmission time interval TTI indicating different lengths using different ACK/NACK feedback resources includes:

The base station may indicate the information of the ACK/NACK feedback resource used by the currently scheduled TTI by using the downlink scheduling signaling, and the indicated ACK/NACK feedback resources are different for the TTIs of different lengths. For the same length of TTI, the ACK/NACK feedback resources indicated by the scheduling signaling may be the same or different. The ACK/NACK feedback resource is one of a time division resource, a frequency division resource, and a code division resource.

Specifically, the eNB may use the resource indication information to indicate the ACK/NACK feedback resource corresponding to the TTI of each length, where the ACK/NACK feedback resources used by the TTIs of different lengths are different. The base station carries the resource indication information in the downlink scheduling signaling and sends the information to the terminal.

Example 2:

In the above embodiment, the base station may further determine the number of the scheduled TTI and the feedback delay, and carry the number and the feedback delay of the TTI in the downlink scheduling signaling, and send the terminal to the terminal according to the Numbering and feedback delay, determining the size of the feedback window for feeding back the TTI;

When the base station configures the terminal to use single carrier transmission, determining the number of the TTI includes:

Identifying a first first length of the TTI for the scheduled non-minimum length of the TTI, and determining a first number of the first first length of the TTI, according to scheduling each other first length Determining, by an interval between a time position of the TTI and a time position of the TTI of the first first length, determining a first number of the TTI of each of the other first lengths; wherein the number of the other time positions is the same as the number The difference of the number of one time position is the number of the first length included in the interval;

Determining a time position on the carrier according to a minimum length of the second length of the scheduled length, and identifying a time position on the carrier according to a minimum length of the saved TTI; identifying a first time position in which a TTI of the second length is scheduled, determining the first a number of time positions; numbering the other time positions according to the distances of the other time positions from the first time position, according to the number of each time position of the subframe in which each second length of TTI is scheduled, A second number of TTIs for each second length is determined.

For example, the TTI of the base station scheduling includes a TTI of 14 symbol lengths and a TTI of 7 symbol lengths. When the lengths of the scheduled TTIs are not equal, the TTI of 14 symbol lengths is referred to as the TTI of the first length in the embodiment of the present invention. A TTI having a minimum length of 7 symbol lengths is referred to as a second length TTI. The first number corresponding to the TTI of the first length and the second number corresponding to the TTI of the second length are determined in different manners.

14 symbol lengths contain two time slots, then one subframe can be scheduled for a length of 14 symbols. TTI can also schedule 7 symbol length TTIs at any one time position.

In FIG. 2A, when the base station configuration terminal adopts single carrier transmission, the lengths of the scheduled TTIs are not equal. The base station schedules a TTI of a first length of a non-minimum length in subframe n, subframe n+2, and subframe n+3, that is, a TTI of 14 symbols in length, in two positions of subframe n+4. Two minimum lengths, that is, a second length TTI, that is, a TTI having a length of 7 symbols, are scheduled, and a second length is scheduled to be a TTI at a first position in the subframe n+5.

For the first length of the TTI, the base station identifies the subframe 1 to schedule the first first length of the TTI, and determines the first first length of the TTI first number a to be 1, according to scheduling each other first length. The first number of the TTI of each of the other first lengths is determined by the interval between the subframe of the TTI and the subframe in which the TTI of the first first length is scheduled.

2A, it is determined that the TTI of the second first length is scheduled in subframe n+2, and the interval between subframe n+2 and subframe n in which the first first length of TTI is scheduled is 2, so subframe n The first number a of the TTI of the first length of the +2 scheduling is 3, and so on, and the first number a of the third first length TTI scheduled by the subframe n+3 in FIG. 2A is 4.

For the scheduled second length TTI, that is, the TTI of 7 symbol lengths, the base station divides the time position on the carrier according to the TTI of 7 symbol lengths, and identifies the first time position of the TTI of the second length. The first time position is numbered, and the first position of the TTI of the second length is scheduled in FIG. 2A as the first time slot of the subframe n+4, and the number of the first time position is determined to be 1 Then, the number corresponding to each time position in each sub-frame is 2, 3, ..., etc., and a is denoted by a in FIG. 2A. The number of the time position in which each TTI of the second length is located is taken as the second number of the TTI of the second length. Therefore, it can be known that the number of the first time slot of the subframe n+4 is 1, and the second number of the second length TTI scheduled by the first time slot of the subframe n+4 is 1, and the subframe n+4 The number of the second time slot is 2, and the second number of the TTI of the second length scheduled by the second time slot of the subframe n+4 is 2, and the number of the first time slot of the subframe n+5 is 3 Then, the second number of the second length TTI scheduled by the subframe n+5 in the first time slot is 3.

And the base station may further determine a difference between a time when the TTI is transmitted to the feedback information transmission location and a minimum processing delay, and determine the difference as a feedback delay of the TTI, where the minimum processing delay is received by the terminal. The minimum time to demodulate and generate feedback information after the data packet, and the feedback delay is determined based on the shortest TTI length transmitted in the feedback window.

As shown in FIG. 2A, the subframe of the uplink TTI for feedback that is determined by the base station is subframe n+7, and the base station schedules TTIs of two lengths, for the TTI of the first length, that is, the TTI of 14 symbol lengths, the subframe n The interval between +7 and subframe n+1 is 7, and the minimum feedback delay stored by the base station is 4. Therefore, the feedback delay corresponding to subframe n+1 is 3. In this case, as the interval decreases, the feedback delay corresponding to each location is 2, 1, and 0, respectively. Therefore, it can be known that the first feedback delay m of the TTI of the first length scheduled by the subframe n is 3. The first feedback delay of the TTI of the first length scheduled by the subframe n+2 is 1, and the first feedback delay of the TTI of the first length scheduled by the subframe n+3 is 0.

For the TTI of the second length, that is, the TTI of the minimum length of 7 symbol lengths, after the feedback is divided by the embodiment corresponding to the second embodiment, it can be known that the subframe of the uplink TTI for which feedback is determined by the base station is the subframe n+7. The subframe n+7 is separated from the first position of the subframe n+5 by 4 positions, and the minimum feedback delay saved by the base station is 4, so that the feedback corresponding to the first position of the subframe n+5 is known. The delay is 0. In this way, as the interval increases, the feedback delay corresponding to each position is 1, 2, so that the second feedback delay of the second length TTI scheduled by subframe n+5 is 0, The second feedback delay of the second length of the frame n+4 and the second length of the second position is 2 and 1. In Figure 2A, m is used to represent the feedback delay.

On the basis of the foregoing embodiments, the size of the feedback window corresponding to the TTIs of different lengths is different. To facilitate the accurate identification of the terminal, the method further includes:

The base station indicates that different lengths of transmission time intervals TTI use different ACK/NACK feedback resources for feedback. The resource is one of a time division resource, a code division resource, and a frequency division resource. Specifically, in this embodiment, the feedback window M1 corresponding to the TTI of the first length is 4, and the feedback window N1 corresponding to the TTI of the second length is 4, so the base station instructs the terminal to feed back ACK/NACK through different resources. Specifically, the feedback resource corresponding to the TTI of the first length and the second length may be one of a time division resource, a code division resource, and a frequency division resource.

Example 3:

Based on the foregoing Embodiment 1, each TTI may adopt single carrier transmission or multi-carrier transmission. In the embodiment of the present invention, when the base station configures the terminal to use multi-carrier transmission, determining the number of the TTI includes:

Identifying, for the scheduled non-minimum length of the TTI of the first length, a subframe in which the first one of the first length of the TTI is scheduled, and determining a first number of the first first length of the TTI, Determining a first number of each of the other first length TTIs according to an interval of each other first length TTI subframe scheduled by all carriers and a subframe scheduling the first first length TTI; The first number of the TTI of the first length of the subframe scheduling at the same time in the multi-carrier is the same;

Determining a time position on the carrier according to a minimum length of the second length of the scheduled minimum length of the TTI; identifying the first time position of the TTI in which the second length is scheduled, determining the location a number of the first time position; numbering the other time positions according to an interval of other time positions of all carriers from the first time position; according to scheduling each time position of each second length of TTI The number of each of the second lengths of the TTI is determined, wherein the number of the same time positions of each subframe of each carrier is the same.

The TTI that the base station can schedule includes a TTI of 14 symbol lengths and a TTI of 7 symbol lengths. When the lengths of the scheduled TTIs are not equal, the TTI of 14 symbol lengths is referred to as the TTI of the first length in the embodiment of the present invention. A TTI having a minimum length of 7 symbol lengths is referred to as a second length TTI. The first number corresponding to the TTI of the first length and the second number corresponding to the TTI of the second length are determined in different manners.

Each subframe has 14 symbol lengths including two time slots, and one subframe can schedule a TTI of 14 symbol lengths, and can also schedule 7 symbol length TTIs at any one time position.

2B is a multi-carrier transmission in which the lengths of the TTIs scheduled by the base station are not equal. A TTI of a first length of a non-minimum length, that is, a TTI of 14 symbol lengths and a TTI of a second length of a minimum length, that is, a TTI of 7 symbol lengths, are simultaneously scheduled on both carrier 1 and carrier 2. A TTI of a first length is scheduled in subframe n of carrier 1 and subframe n+2 of carrier 2; at a first position of subframe n+1 of carrier 1, subframe n+3, and subframe n+4 The first location and the subframe n+3 of carrier 2 both schedule a second length of TTI, and the base station indicates that all scheduled TTIs are fed back in subframe n+6.

For the feedback window, the base station identifies that all the carriers are scheduled to be the subframe n of the first first-length TTI, and determines that the first number of the first first-length TTI is 1, and each of the other carriers is scheduled. And determining, by the interval between the subframe of the first length TTI and the subframe of the TTI that schedules the first first length, the first number of the TTI of each of the other first lengths. The first number of the TTI of the first length of the subframe scheduling at the same time in the multi-carrier is the same.

As shown in FIG. 2B, it is determined that the second pre-scheduled TTI on the carrier 2 is subframe n+2, and the interval from the first first-length TTI subframe on the carrier 1 is 2. Therefore, the first number a of the second first length TTI scheduled on carrier 2 is three.

For the scheduled second length of the TTI, that is, the TTI of 7 symbol lengths, the number of the first time position of the TTI of the second length of all the carriers is determined to be 1, and the other bit time is set according to the other bits of the carrier. The interval of the first time position is described, and the other time positions are numbered, so that the second number of each second length TTI can be determined according to the number of each time position.

According to FIG. 2B, it can be determined that the number of the first time position of the subframe n+1 on the carrier 1 is 1, and the number of the first time position and the second time position of the subframe n+3 is 5 respectively. And 6, the first time position of the subframe n+4 is numbered 7, and the number of the same time position of each subframe in all carriers is the same, so the first time position and the first time of the subframe n+3 in the carrier 2 The numbers of the two time positions are also 5 and 6, respectively. Therefore, it can be seen that the second number of the second length TTI scheduled for the first time position of the subframe n+1 on carrier 1 is 1, and the subframe n+3 The second number of the second length TTI scheduled by the first time position and the second time position is 5 and 6, respectively, and the second number of the second length TTI scheduled by the first time position of the subframe n+4 7, the same time position of each subframe in all carriers is the same, so the first time position of the subframe n+3 in the carrier 2 and the second number of the second length TTI scheduled in the second time position are also 5 and 6 respectively.

As shown in FIG. 2B, the subframe of the uplink TTI that is determined by the base station is the subframe n+6. For the TTI of the first length, the subframe 1 in the carrier 1 schedules the TTI of the first length, and the subframe n and The interval of the subframe n+6 is 6, and the minimum feedback delay of the base station is 4, so that the first feedback delay m of the TTI of the first length scheduled by the subframe n is 2. In the carrier 2, the sub-frame n+2 schedules the TTI of the first length, the interval between the subframe n+2 and the subframe n+6 is 4, and the minimum feedback delay saved by the base station is 4, so that the subframe n is known. The first feedback delay m of the TTI of the first length of the +2 scheduling is 0.

For the second length of TTI, the minimum TTI length is used, and the divided carrier includes multiple time positions. The number of each time position is as shown in Embodiment 3. The subframe of the uplink TTI that is determined by the base station is the subframe n+6, and the interval between the subframe n+6 and the first time position of the subframe n+4 is four, and the minimum feedback delay saved by the base station is 4. Therefore, it can be seen that the feedback delay corresponding to the first time position of the subframe n+4 is 0. In this way, as the interval increases, the feedback delay corresponding to each position is 1, 2, ... 6, respectively, wherein the feedback delay of the same time position of each subframe of each carrier is the same, In Figure 2B, m is used to represent the feedback delay.

Therefore, in the carrier 1, the second feedback delay of the second length TTI scheduled by the subframe n+1 is 6, the first time position of the subframe n+3 and the second length of the TTI scheduled by the second time position. The second feedback delay is 2 and 1, respectively, and the second feedback delay of the second length TTI scheduled by the first time position of the subframe n+4 is 0; respectively, because the feedback of the same time position of each carrier corresponds The delays are the same, so the second feedback delay of the second time TTI of the subframe n+3 and the second length of the second time position in the carrier 2 are also 2 and 1, respectively.

Specifically, the base station may indicate, by using the downlink scheduling signaling, information about the ACK/NACK feedback resource used by the currently scheduled TTI, where the ACK/NACK feedback resources of the TTIs of different lengths are different. In this embodiment, the determined feedback window M of the TTI of the first length is 3, and the feedback window N corresponding to the TTI of the second length is 7. Therefore, the base station instructs the terminal to feed back ACK/NACK through different resources. Specifically, the feedback resource corresponding to the TTI of the first length and the second length may be one of a time division resource, a code division resource, and a frequency division resource.

Example 4:

In the embodiment of the present invention, when the base station configures the terminal to use multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the embodiment of the present invention indicates the transmission time interval TTI of different lengths. The method of using different ACK/NACK feedback resources for feedback is:

When the base station uses multi-carrier transmission information, each carrier may have only one length of TTI, or may have different lengths of TTI, and the lengths of TTIs on different carriers may be different or the same. For the case where there is only one length of TTI on each carrier, the lengths of TTIs on different carriers are different. The base station can indicate different lengths through high layer signaling The carrier of the TTI is divided into different carrier groups; the carriers of the TTI of the same length may be divided into the same carrier group, or may be divided into different carrier groups.

Or the base station indicates the length of the TTI on each carrier by using the high layer signaling, so that the terminal divides the carriers of the TTIs with different lengths into different carrier groups, and the TTIs of the same length can be divided into the same carrier group, and the TTIs of the same length are also Can be divided into different carrier groups. Different uplink feedback carrier groups use different ACK/NACK feedback resources for feedback. The same uplink feedback carrier group uses the same ACK/NACK feedback resource for feedback, and the same uplink feedback carrier group can also use different ACK/NACK feedback resources for feedback. The ACK/NACK feedback resource is one of a time division resource, a frequency division resource, and a code division resource.

The feedback of using different ACK/NACK feedback resources in the different uplink feedback carrier groups includes:

As shown in FIG. 2C, the existing carrier group 1 and the carrier group 2, the carrier group 1 includes the carrier 1 and the carrier 2, and the carrier group 2 includes the carrier 3. When feedback is performed, the feedback information in the carrier group 1 belongs to the current Feedback is performed on one carrier 1 in the carrier group 1, and the feedback information in the carrier group 2 is fed back on one carrier 3 in the current carrier group 2; or the feedback information of the carrier group 1 and the carrier group 2 are all on the same carrier 1 Feedback is made, but feedback must be made using different ACK/NACK feedback resources.

The different ACK/NACK feedback resources corresponding to the TTIs of different lengths are one of a time division resource, a frequency division resource, and a code division resource.

Example 5:

In the embodiment of the present invention, both the terminal and the base station can determine the codebook size of the feedback information according to the paradigm of the fixed codebook. And, the base station indicates that different lengths of transmission time intervals TTI use different ACK/NACK feedback resources for feedback; and for each length of TTI, according to the indication, the feedback information is received on the corresponding ACK/NACK feedback resource.

The following description is made by way of a specific embodiment. As shown in FIG. 2D, the base station schedules a TTI of 14 symbol lengths in subframe n, and a TTI of 7 symbol lengths is scheduled at the first time position of subframe n+5, and the base station indicates these scheduled TTIs. Feedback is performed in the uplink subframe n+7, but different lengths of TTI use different feedback resources. In the embodiment of the present invention, both the terminal and the base station can determine the codebook size of the feedback information according to the paradigm of the fixed codebook. Assume that the maximum possible number of downlink TTIs of the same length in the same uplink TTI is 4, and in a feedback resource, the size and length of the feedback window corresponding to the TTI of 14 symbols are 7 symbols. The TTI feedback window has a size of 4.

In subframe n+7, a TTI corresponding to a TTI of length 14 symbols and a TTI pair of 7 symbols in length The feedback resources are different. The base station indicates that the transmission time interval TTI of different lengths uses different ACK/NACK feedback resources for feedback. The specific base station may send downlink scheduling signaling to the terminal to indicate the ACK/NACK used by the currently scheduled TTI. Feedback resource information. For example, the information indicating the ACK/NACK feedback resource used by the currently scheduled TTI may be indicated by the resource indication information, and the ACK/NACK feedback resources of the TTIs of different lengths are different. Specifically, for example, a feedback resource corresponding to a TTI of 14 symbols and a TTI corresponding to a 7-bit length may be frequency-divided, code-divided, or time-divided.

Example 6

FIG. 3 is a schematic diagram of an ACK/NACK feedback process applied to a terminal according to an embodiment of the present invention, where the process includes the following steps:

S301: Receive information that different lengths of transmission time intervals TTI indicated by the base station use different ACK/NACK feedback resources for feedback.

The ACK/NACK feedback method provided by the embodiment of the present invention is applied to a terminal.

The base station can identify the length of the transmission time interval TTI, and use the different ACK/NACK feedback resources to perform feedback according to different transmission time intervals TTI indicating the length of the transmission time interval TTI, so that the terminal feeds back according to the indicated feedback resources.

S302: For each length of the TTI, perform feedback on the corresponding ACK/NACK feedback resource according to the indication.

Specifically, the information that the different length of the transmission time interval TTI indicated by the receiving base station uses different ACK/NACK feedback resources for feedback includes:

Specifically, the eNB may use the resource indication information to indicate the ACK/NACK feedback resource corresponding to the TTI of each length, where the ACK/NACK feedback resources of the TTIs of different lengths are different. The base station carries the resource indication information in the downlink scheduling signaling and sends the information to the terminal.

After receiving the downlink scheduling signaling, the terminal uses the corresponding ACK/NACK feedback resource to perform feedback according to the resource indication information carried in the terminal.

In the case of multi-carrier transmission, if there is only one length of TTI on each carrier, and the lengths of TTIs on different carriers are different, the base station may instruct the terminal to divide carriers of different lengths of TTIs into different resource groups. Therefore, when there is only one length of TTI on each carrier, and the length of the TTIs on different carriers is different, the transmission time interval TTIs of different lengths indicated by the receiving base station use different ACK/NACK feedback resources. The feedback information includes:

Receiving, by the base station, the carriers that have TTIs of different lengths are divided into different carrier groups by using the high-layer signaling, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups; or

The receiving base station indicates the length of the TTI on each carrier by using the high layer signaling, and the terminal divides the carriers of the TTIs with different lengths into different carrier groups, and uses different ACK/NACKs in different uplink feedback carrier groups. Feedback resources for feedback.

When the base station uses multi-carrier transmission information, each carrier may have only one length of TTI, or may have different lengths of TTI, and the lengths of TTIs on different carriers may be different or the same. For a case where there is only one length of TTI on each carrier and the lengths of TTIs on different carriers are different, the base station may indicate that carriers of different lengths of TTIs are divided into different carrier groups by using higher layer signaling, and carriers of the same length of TTI are used. It can be divided into the same carrier group or divided into different carrier groups. Or the base station indicates the length of the TTI on each carrier by using the high layer signaling, so that the terminal divides the carriers of the TTIs with different lengths into different carrier groups, and the TTIs of the same length can be divided into the same carrier group, and the TTIs of the same length are also Can be divided into different carrier groups. Different uplink feedback carrier groups use different ACK/NACK feedback resources for feedback, and the same uplink feedback carrier group uses the same ACK/NACK feedback resource for feedback. The same same uplink feedback carrier group can also use different CK/NACK feedback resources. Feedback. The ACK/NACK feedback resource is one of a time division resource, a frequency division resource, and a code division resource.

FIG. 4 is a schematic structural diagram of a first ACK/NACK feedback apparatus according to an embodiment of the present invention, which is applied to a base station, where the apparatus includes:

The indicating module 41 is configured to indicate that different lengths of transmission time intervals TTI use different ACK/NACK feedback resources for feedback;

The receiving module 42 is configured to, for each length of the TTI, receive feedback information on the corresponding ACK/NACK feedback resource according to the indication.

Optionally, the indicating module 41 is specifically configured to:

The ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.

FIG. 5 is an ACK/NACK feedback device, which is applied to a terminal according to an embodiment of the present invention, where the device includes:

The receiving module 51 is configured to receive information that the different length of the transmission time interval TTI indicated by the base station uses different ACK/NACK feedback resources for feedback;

The feedback module 52 is configured to perform feedback on the corresponding ACK/NACK feedback resource according to the indication for each length of TTI.

Optionally, the receiving module 51 is specifically configured to:

FIG. 6 is an ACK/NACK feedback system according to an embodiment of the present invention. The system includes the ACK/NACK feedback device applied to the base station 61 shown in FIG. 4, and the ACK/ applied to the terminal 62 shown in FIG. 5. NACK feedback device.

The present invention discloses an ACK/NACK feedback method, device and system. The base station indicates that different lengths of transmission time intervals TTI use different ACK/NACK feedback resources for feedback; and for each length of TTI, according to the indication, corresponding Receive feedback information on the ACK/NACK feedback resource. Since the base station indicates that the transmission time interval TTI of different lengths of the terminal uses different ACK/NACK feedback resources for feedback for each length of transmission time interval TTI, and receives feedback information on the corresponding ACK/NACK feedback resource, the base station and the terminal are avoided. There is a misunderstanding between the feedback ACK/NACK.

As shown in FIG. 7, the second acknowledgement information ACK/non-acknowledgement NACK feedback apparatus provided by the embodiment of the present invention is applied to a base station, and the apparatus includes:

The processor 701 is configured to read a program in the memory and perform the following process:

The transceiver 702 is configured to receive and transmit data under the control of the processor 701.

Optionally, the processor 701 is specifically configured to:

Optionally, the ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.

In FIG. 7, a bus architecture (represented by bus 700), which may include any number of interconnected buses and bridges, will include one or more processors represented by processor 701 and memory represented by memory 704. The various circuits are linked together. The bus 700 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein. Bus interface 703 provides an interface between bus 700 and transceiver 702. Transceiver 702 can be an element or a plurality of elements, such as multiple receivers and transmitters, providing means for communicating with various other devices on a transmission medium. The data processed by the processor 701 is transmitted over the wireless medium via the antenna 705. Further, the antenna 705 also receives the data and transmits the data to the processor 701.

The processor 701 is responsible for managing the bus 700 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 704 can be used to store data used by the processor 701 in performing operations.

Optionally, the processor 701 may be a CPU (Central Embedded Device), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device). , complex programmable logic devices).

As shown in FIG. 8, the second acknowledgement information ACK/non-acknowledgement NACK feedback apparatus provided by the embodiment of the present invention is applied to a terminal, and the apparatus includes:

The processor 801 is configured to read a program in the memory and perform the following process:

Receiving, by the transceiver 802, information of different lengths of transmission time intervals TTI indicated by the base station using different ACK/NACK feedback resources for feedback; for each length of TTI, according to the indication, performing on the corresponding ACK/NACK feedback resource Feedback

The transceiver 802 is configured to receive and transmit data under the control of the processor 801.

Optionally, the processor 801 is specifically configured to:

In FIG. 8, a bus architecture (represented by bus 800), bus 800 may include any number of interconnected buses and bridges, and bus 800 will include one or more processors and memory 804 represented by general purpose processor 801. The various circuits of the memory are linked together. The bus 800 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein. Bus interface 803 provides an interface between bus 800 and transceiver 802. Transceiver 802 can be an element or a plurality of elements, such as multiple receivers and transmitters, providing means for communicating with various other devices on a transmission medium. For example, transceiver 802 receives external data from other devices. The transceiver 802 is configured to send the processed data of the processor 801 to other devices. Depending on the nature of the computing system, a user interface 805 can also be provided, such as a keypad, display, speaker, microphone, joystick.

The processor 801 is responsible for managing the bus 800 and the usual processing, running the general purpose operating system as described above. The memory 804 can be used to store data used by the processor 801 when performing operations.

Optionally, the processor 801 can be a CPU, an ASIC, an FPGA, or a CPLD.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although a preferred embodiment of the present invention has been described, one of ordinary skill in the art will be aware of the basic inventive Additional changes and modifications may be made to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A method for confirming information ACK/non-acknowledgement NACK feedback is characterized in that it is applied to a base station, and the method includes:

Instructing different lengths of transmission time intervals TTI to use different ACK/NACK feedback resources for feedback;

And for each length of TTI, according to the indication, receiving feedback information on the corresponding ACK/NACK feedback resource.
The method according to claim 1, wherein the indicating that the transmission time interval TTI of different lengths uses different ACK/NACK feedback resources for feedback comprises:

The information of the ACK/NACK feedback resource used by the currently scheduled TTI is indicated by the downlink scheduling signaling, where the ACK/NACK feedback resources used by the TTIs of different lengths are different.
The method according to claim 1, wherein when the carrier is multi-carrier transmission and there is only one length of TTI on each carrier, and the lengths of TTIs on different carriers are different, the transmission time interval indicating different lengths is used. The TTI uses different ACK/NACK feedback resources for feedback including:

The carriers of the TTIs with different lengths are divided into different carrier groups by using the high-level signaling, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups; or

The length of the TTI on each carrier is indicated by the high layer signaling, so that the terminal divides the carriers of the TTIs with different lengths into different carrier groups, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups. .
The method according to claim 3, wherein the using different ACK/NACK feedback resources in the different uplink feedback carrier groups for feedback comprises:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.
The method according to any one of claims 1-4, wherein the different ACK/NACK feedback resources corresponding to TTIs of different lengths are one of the following resources:

Time division resources, frequency division resources, code division resources.
A method for confirming information ACK/non-confirmation information NACK is characterized in that it is applied to a terminal, and the method includes:

Receiving, by the base station, different lengths of transmission time intervals, TTIs, using different ACK/NACK feedback resources for feedback information;

For each length of TTI, feedback is performed on the corresponding ACK/NACK feedback resource according to the indication.
The method of claim 6 wherein said receiving base station indicates different lengths of transmission The information that the time interval TTI uses different ACK/NACK feedback resources for feedback includes:

Receiving, by the base station, information about an ACK/NACK feedback resource used by a currently scheduled TTI by using downlink scheduling signaling, where ACK/NACK feedback resources used by different lengths of TTIs are different.
The method according to claim 6, wherein when the carrier is multi-carrier transmission and there is only one length of TTI on each carrier, and the lengths of TTIs on different carriers are different, the receiving base station indicates different The length of the transmission time interval TTI uses different ACK/NACK feedback resources for feedback information including:

Receiving, by the base station, the carriers that have different lengths of TTIs are allocated to different carrier groups, and the different uplink feedback carrier groups use different ACK/NACK feedback resources for feedback; or

Receiving, by the base station, the length of the TTI on each carrier indicated by the high layer signaling, and dividing the carriers of the TTIs having different lengths into different carrier groups according to the length of the TTI on each carrier, and different uplinks Different ACK/NACK feedback resources are used in the feedback carrier group for feedback.
The method according to claim 8, wherein the using different ACK/NACK feedback resources in the different uplink feedback carrier groups for feedback comprises:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.
The method according to any one of claims 6-9, wherein the ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.
An acknowledgement information ACK/non-acknowledgement NACK feedback device is characterized in that it is applied to a base station, and the device includes:

An indication module, configured to indicate that different lengths of transmission time intervals TTI use different ACK/NACK feedback resources for feedback;

The first receiving module is configured to receive the feedback information on the corresponding ACK/NACK feedback resource according to the indication for the TTI of each length.
The device according to claim 11, wherein the indication module is specifically configured to:

The information of the ACK/NACK feedback resource used by the currently scheduled TTI is indicated by the downlink scheduling signaling, where the ACK/NACK feedback resources used by the TTIs of different lengths are different.
The device according to claim 11, wherein the indication module is specifically configured to:

When the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the carriers with different lengths of TTIs are divided into different carrier groups by different high-level signaling indications, and different uplinks are used. Feedback is performed using different ACK/NACK feedback resources in the feedback carrier group; or indicated by higher layer signaling on each carrier The length of the TTI is such that the terminal divides the carriers of the TTIs having different lengths into different carrier groups, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups.
The device according to claim 13, wherein the indication module is specifically configured to:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.
The apparatus according to any one of claims 11-14, wherein the ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.
An acknowledgement information ACK/non-confirmation information NACK feedback device is characterized in that it is applied to a terminal, and the device includes:

a first receiving module, configured to receive information that the different length of the transmission time interval TTI indicated by the base station uses different ACK/NACK feedback resources for feedback;

The feedback module is configured to perform feedback on the corresponding ACK/NACK feedback resource according to the indication for each length of TTI.
The device according to claim 16, wherein the first receiving module is specifically configured to:

Receiving, by the base station, information about an ACK/NACK feedback resource used by a currently scheduled TTI by using downlink scheduling signaling, where ACK/NACK feedback resources used by different lengths of TTIs are different.
The device according to claim 16, wherein the first receiving module is specifically configured to:

When the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the receiving base station divides carriers with different lengths of TTIs indicated by higher layer signaling into different ones. a carrier group, in which different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups; or receiving a length of a TTI on each carrier indicated by the high-layer signaling by the base station, according to the TTI on each carrier The carrier of the TTIs with different lengths is divided into different carrier groups, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups.
The device according to claim 18, wherein the first receiving module is specifically configured to:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.
An acknowledgement information ACK/non-acknowledgement NACK feedback system, characterized in that the system comprises an ACK/NACK feedback device applied to a base station according to any of claims 11-15, and any one of claims 16-19 An ACK/NACK feedback device applied to the terminal.
A confirmation information ACK/non-confirmation information NACK feedback device, which is applied to a base station, The device includes:

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

Instructing different lengths of transmission time intervals TTI to use different ACK/NACK feedback resources for feedback; and for each length of TTI, receiving feedback information on corresponding ACK/NACK feedback resources according to the indication;

A transceiver for receiving and transmitting data under the control of a processor.
The device according to claim 21, wherein the processor is specifically configured to:

The information of the ACK/NACK feedback resource used by the currently scheduled TTI is indicated by the downlink scheduling signaling, where the ACK/NACK feedback resources used by the TTIs of different lengths are different.
The device according to claim 21, wherein the processor is specifically configured to:

When the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the carriers with different lengths of TTIs are divided into different carrier groups by different high-level signaling indications, and different uplinks are used. The feedback carrier group uses different ACK/NACK feedback resources for feedback; or the high-level signaling indicates the length of the TTI on each carrier, so that the terminal divides the carriers with different lengths of TTI into different carrier groups, Different ACK/NACK feedback resources are used in different uplink feedback carrier groups for feedback.
The device according to claim 23, wherein the processor is specifically configured to:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.
The apparatus according to any one of claims 21 to 24, wherein the ACK/NACK feedback resource is one of the following resources:

Time division resources, frequency division resources, code division resources.
An acknowledgement information ACK/non-confirmation information NACK feedback device is characterized in that it is applied to a terminal, and the device includes:

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

Receiving, by the transceiver, information of different lengths of transmission time intervals TTI indicated by the base station using different ACK/NACK feedback resources for feedback; for each length of TTI, performing feedback on the corresponding ACK/NACK feedback resource according to the indication ;

A transceiver for receiving and transmitting data under the control of a processor.
The device according to claim 26, wherein the processor is specifically configured to:

Receiving, by the transceiver, the information indicating the ACK/NACK feedback resource used by the currently scheduled TTI by the base station by using the downlink scheduling signaling, where the ACK/NACK feedback resources used by the TTIs of different lengths are different.
The device according to claim 26, wherein the processor is specifically configured to:

When the carrier is multi-carrier transmission, and there is only one length of TTI on each carrier, and the lengths of the TTIs on different carriers are different, the receiving base station divides carriers with different lengths of TTIs indicated by higher layer signaling into different ones. a carrier group, in which different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups; or receiving a length of a TTI on each carrier indicated by the high-layer signaling by the base station, according to the TTI on each carrier The carrier of the TTIs with different lengths is divided into different carrier groups, and different ACK/NACK feedback resources are used for feedback in different uplink feedback carrier groups.
The device according to claim 28, wherein the processor is specifically configured to:

The feedback information in each carrier group is fed back on one carrier in the current carrier group; or

The feedback information of different carrier groups is fed back on different ACK/NACK feedback resources on the same carrier.