WO2017107731A1

WO2017107731A1 - Method and device for uplink control channel transmission

Info

Publication number: WO2017107731A1
Application number: PCT/CN2016/106972
Authority: WO
Inventors: 石靖; 夏树强; 张雯; 韩祥辉; 任敏; 张文峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-12-21
Filing date: 2016-11-23
Publication date: 2017-06-29
Also published as: CN106899381A

Abstract

Provided in the present invention are a method and a device for uplink control channel transmission. Said method comprises: sending an uplink control channel in one or more predetermined subframe(s) of a time division duplexing (TDD) frame, the uplink control channel being used for hosting feedback information to a downlink traffic channel, and the predetermined subframe(s) comprising at least one of the follows: a special subframe and a downlink subframe. The present invention solves the problem of the long feedback delay of the TDD system, reducing the feedback delay of the TDD system.

Description

Uplink control channel transmitting method and device

Technical field

The present invention relates to the field of communications, and in particular to an uplink control channel transmission method and apparatus.

Background technique

The existing Long-Term Evolution (LTE)/Long-Term Evolution Advance (LTE-Advance or LTE-A) is divided into Frequency Division Duplexing (FDD). And Time Division Duplexing (TDD) two frame structures. FIG. 1 is a schematic diagram of a frame structure of an FDD mode according to the related art. As shown in Figure 1, a 10ms radio frame consists of twenty slots of length 0.5ms, numbered 0-19, and slots 2i and 2i+1 form a subframe of length 1ms. i, i is 0 or a natural number. 2 is a schematic diagram of a frame structure of a TDD mode according to the related art. As shown in FIG. 2, a 10 ms radio frame is composed of two half frames having a length of 5 ms, and one field includes five lengths of 1 ms. In the subframe, the subframe i is defined as two slots 2i and 2i+1 having a length of 0.5 ms. The FDD system feedback timing interval is k=4, and the TDD system feedback timing interval k≥4, where k represents the corresponding number of subframes.

At present, applications such as the Internet of Things (IoT) and real-time monitoring are increasingly demanding for delay reduction. The research time reduction for LTE/LTE-A systems has become a hot topic in international research. Current delay reduction requirements The primary method for FDD systems is to reduce the transmission time interval (TTI), but it is more difficult for TDD systems.

Therefore, in addition to reducing the length of the subframe, the feedback timing interval can be further shortened as the processing capability of the base station and the terminal is improved. However, as shown in Table 1, the uplink and downlink subframe configurations of the existing LTE TDD system in the existing system are as shown in Table 1. The configuration of the uplink control channel is correct or not (ACK/NACK) for the downlink downlink traffic channel (PDSCH) carrying the downlink service channel (PDSCH) carrying the downlink service data. The minimum requirement for the feedback timing interval of the Physical Uplink Control Channel (PUCCH) can be reduced. However, the downlink service data cannot be quickly fed back due to the small number of uplink subframes, thus affecting the end-to-end delay.

Table 1 Configuring the uplink and downlink subframes of the LTE TDD system

In view of the problem of extended feedback of TDD systems, no effective solution has yet been proposed.

Summary of the invention

The embodiment of the invention provides a method and a device for transmitting an uplink control channel, so as to at least solve the problem of prolonged feedback of the TDD system.

According to an aspect of the present invention, a method for transmitting an uplink control channel is provided, including: transmitting an uplink control channel in one or more predetermined subframes of a TDD frame, where the uplink control channel is used for carrying downlink The feedback information of the traffic channel, the predetermined subframe includes at least one of the following: a special subframe, a downlink subframe.

Optionally, transmitting the uplink control channel in one or more of the predetermined subframes of the TDD frame comprises: reciprocal of each subframe in one or more of the predetermined subframes of the TDD frame The uplink control channel is transmitted on M Orthogonal Frequency Division Multiplexing (OFDM) symbols, where M is a positive integer.

Optionally, before the sending the uplink control channel in one or more of the predetermined subframes of the TDD frame, the method further includes: determining, by using a predefined manner, and/or sending a configuration signaling manner by the base station, The predetermined subframe is described.

Optionally, determining the predetermined subframe by using the predefined manner includes implicitly determining the predetermined subframe according to an uplink and downlink subframe configuration and a minimum feedback timing interval of the TDD frame.

Optionally, in the case that the uplink and downlink subframes are configured as the uplink and downlink subframe configuration 2, determining the predetermined subframe includes: determining that the predetermined subframe is a downlink subframe immediately after the uplink subframe, where The uplink subframe includes one of: an uplink subframe in the first half frame or the second half frame of the TDD frame, and two uplink subframes in the TDD frame.

Optionally, determining the predetermined subframe includes: determining that the predetermined subframe is an N-k1 or a last k1+1th downlink subframe in consecutive N downlink subframes, where N is a positive integer , k1 is the minimum feedback timing interval.

Optionally, when the uplink and downlink subframes are configured as the uplink and downlink subframe configuration 5, determining the predetermined subframe includes: determining that the predetermined subframe is the Nth of consecutive N downlink subframes. K1-1 or reciprocal k1+2 downlink subframes, where N is a positive integer and k1 is the minimum feedback timing interval.

Optionally, determining, by using the predefined manner, the predetermined subframe includes: determining that the predetermined subframe is a downlink subframe located at an intermediate position of consecutive N downlink subframes, where N is a positive integer.

Optionally, when N is an odd number, the predetermined subframe is the first one of the N downlink subframes.

Downstream subframes, where

If the N is an even number, the predetermined subframe is the N/2th downlink subframe or the (N/2)+1th downlink sub-frame of the N downlink subframes. frame.

Optionally, determining, by using the predefined manner, the predetermined subframe includes: determining, by using the predefined manner, a first subframe included in the predetermined subframe; in addition to the first subframe Determining a second subframe included in the predetermined subframe in a plurality of consecutive downlink subframes or in a special subframe.

According to another aspect of the present invention, an uplink control channel transmitting apparatus is provided, including: a sending module, configured to send an uplink control channel in one or more predetermined subframes of a TDD frame, where the uplink control channel For carrying For the feedback information of the downlink traffic channel, the predetermined subframe includes at least one of the following: a special subframe and a downlink subframe.

Optionally, the sending module is configured to: send the uplink control channel on a reciprocal M orthogonal frequency division multiplexing OFDM symbols of each subframe in one or more of the predetermined subframes of the TDD frame Where M is a positive integer.

Optionally, the apparatus further includes: a determining module, configured to determine the predetermined subframe by using a predefined manner and/or a base station sending a configuration signaling manner.

Optionally, the determining module includes: a first determining unit, configured to determine, by using the predefined manner, a first subframe included in the predetermined subframe; and a second determining unit, configured to be in addition to the first In a plurality of consecutive downlink subframes other than the subframe or in the special subframe, the second subframe included in the predetermined subframe is determined.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:

And transmitting an uplink control channel in one or more predetermined subframes of the time division duplex TDD frame, where the uplink control channel is used to carry feedback information on a downlink traffic channel, where the predetermined subframe includes at least one of the following: Subframe, downlink subframe.

Optionally, the storage medium is further arranged to store program code for performing the following steps:

And transmitting an uplink control channel in one or more predetermined subframes of the time division duplex TDD frame, where the uplink control channel is used to carry feedback information on a downlink traffic channel, where the predetermined subframe includes at least one of the following: Subframe, downlink subframe

Before transmitting the uplink control channel in one or more of the predetermined subframes of the TDD frame, the method further includes: determining the predetermined subframe by using a predefined manner and/or a base station sending a configuration signaling manner .

In the embodiment of the present invention, the uplink control channel is sent in one or more predetermined subframes of the TDD frame, where the uplink control channel is used to carry feedback information on the downlink traffic channel, and the predetermined subframe includes at least one of the following: The method of sub-frame and downlink sub-frame solves the problem of prolonged feedback of the TDD system and reduces the feedback delay of the TDD system.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a frame structure of an FDD mode according to the related art;

2 is a schematic diagram of a frame structure of a TDD mode according to the related art;

FIG. 3 is a flowchart of a method for transmitting an uplink control channel according to an embodiment of the present invention; FIG.

4 is an optional flowchart of a method for transmitting an uplink control channel according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of an uplink control channel transmitting apparatus according to an embodiment of the present invention; FIG.

6 is a block diagram 1 of an optional structure of an uplink control channel transmitting apparatus according to an embodiment of the present invention;

7 is a block diagram 2 of an optional structure of an uplink control channel transmitting apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 2 does not increase feedback resources according to an optional embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of feedback timing intervals when each subframe is k≥2 when the UpPTS region is added as a feedback resource in the special subframe according to an optional embodiment of the present invention; FIG.

10 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 2 increases the inverse M OFDM symbol regions in the downlink subframe #3 as feedback resources according to an optional embodiment of the present invention;

11 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 3 does not increase feedback resources according to an optional embodiment of the present invention;

FIG. 12 is a schematic diagram of feedback timing intervals when each subframe is k≥2 when the UpPTS region is added as a feedback resource in the special subframe according to an optional embodiment of the present invention; FIG.

13 is a schematic diagram of feedback timing intervals of each subframe when k ≥ 2 when the uplink and downlink subframe configuration 3 increases the number of M OFDM symbol regions in the downlink subframe #8 as feedback resources according to an alternative embodiment of the present invention;

FIG. 14 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 4 does not increase feedback resources according to an optional embodiment of the present invention; FIG.

FIG. 15 is a schematic diagram of a feedback timing interval when each subframe is k≥2 when the UpPTS region is added as a feedback resource in the special subframe according to an optional embodiment of the present invention; FIG.

16 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 4 increases the number of M OFDM symbol regions in the downlink subframe #8 as feedback resources according to an alternative embodiment of the present invention;

FIG. 17 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 5 is not added with feedback resources according to an optional embodiment of the present invention; FIG.

FIG. 18 is a schematic diagram of feedback timing intervals when each subframe is k≥2 when the UpPTS region is added as a feedback resource in the special subframe according to an optional embodiment of the present invention; FIG.

FIG. 19 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 5 increases the inverse M OFDM symbol regions in the downlink subframe #8 as feedback resources according to an optional embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

It should be noted that the subframe in the embodiment of the present invention is applicable not only to the 1 ms subframe in the existing TDD frame structure, but also to the subframes of other time lengths, for example, 100 us subframes. The downlink subframe in the embodiment of the present invention is not limited to the transmission service category, that is, the multicast broadcast service single frequency network (MBSFN) subframe.

In this embodiment, a method for transmitting an uplink control channel is provided. FIG. 3 is a flowchart of a method for transmitting an uplink control channel according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:

Step S302: Send an uplink control channel in one or more predetermined subframes of the TDD frame, where the uplink control channel is used to carry feedback information on the downlink traffic channel, and the predetermined subframe includes at least one of the following: a special subframe, a downlink Subframe.

Through the foregoing steps, an uplink control channel for carrying feedback information for a downlink traffic channel is sent in one or more predetermined subframes of the TDD frame, and the predetermined subframe may be a special subframe or a downlink subframe, so that the TDD frame is in the TDD frame. In the case that there are few uplink subframes, the feedback information for the downlink traffic channel may be transmitted by using a special subframe or a downlink subframe. It can be seen that the above steps solve the problem of prolonged feedback of the TDD system and reduce the feedback delay of the TDD system.

Optionally, in the foregoing step S302, one or more downlink subframes or special subframes of the TDD frame may be used as a predetermined subframe, and are sent on a last M OFDM symbols of each subframe in the predetermined subframe. An uplink control channel carrying feedback information for a downlink traffic channel. For example, an uplink control channel for carrying feedback information for a downlink traffic channel is transmitted on a reciprocal M OFDM symbols of each subframe of one or more predetermined subframes of the TDD frame, where M is a positive integer, a predetermined subframe The at least one of the following may be included: a special subframe, a downlink subframe. Through the above steps, the state of the downlink channel is fed back by using the inverse M OFDM symbols of the downlink subframe or the special subframe, which solves the problem of prolonged feedback of the TDD system and reduces the feedback delay of the TDD system.

FIG. 4 is an optional flowchart of a method for transmitting an uplink control channel according to an embodiment of the present invention. As shown in FIG. 4, optionally, before step S302, the process further includes the following steps:

Step S300, determining a predetermined subframe by using a predefined manner and/or sending a configuration signaling manner by the base station.

Through the foregoing steps, the downlink subframe or the special subframe may be configured as a predetermined subframe in a predefined manner, or the predetermined subframe may be configured by sending the configuration signaling by the base station, and then sent in the configured predetermined subframe. An uplink control channel carrying feedback information for a downlink traffic channel. It can be seen that, by using the foregoing steps, the downlink subframe and/or the special subframe can be determined as a predetermined subframe used for uplink feedback by using at least one of a fixed/predefined manner and a base station configuration manner, and the feedback of the TDD system is solved. The extended problem reduces the feedback delay of the TDD system.

Optionally, the configuration signaling sent by the base station may include, but is not limited to, one of the following: a high layer signaling including a system information block (SIB), and a radio resource control (Radio Resource Control, RRC for short). Physical layer signaling including Downlink Control Information (DCI).

Optionally, the predetermined subframe may be implicitly determined according to an uplink and downlink subframe configuration and a minimum feedback timing interval of the TDD frame, that is, In the case that the predetermined subframe is determined in a predefined manner, the downlink subframe and/or the special subframe in the TDD frame may be determined as the predetermined subframe according to the uplink and downlink subframe configuration of the different TDD frame and the minimum feedback timing interval k1. .

Optionally, the uplink and downlink subframe configuration includes, but is not limited to, one of the following: an uplink and downlink subframe configuration, an uplink and downlink subframe configuration 3, an uplink and downlink subframe configuration 4, and an uplink and downlink subframe configuration 5. It should be noted that the uplink and downlink subframe configuration 0, the uplink and downlink subframe configuration, and the uplink and downlink subframe configuration 6 may also use the foregoing steps to send feedback, but the uplink in the TDD frame configured by the above three uplink and downlink subframes. There are many sub-frames, which can meet the requirements of the feedback delay of the TDD system, and will not be described here.

Optionally, in the case that the uplink and downlink subframes are configured as the uplink and downlink subframe configuration 2, the predetermined subframe may be determined as the downlink subframe immediately after the uplink subframe, where the uplink subframe may include one of the following: TDD One uplink subframe in the first half frame or the second half frame of the frame, and two uplink subframes in the TDD frame.

Optionally, the predetermined subframe may be determined to be the N-k1 or the last k1+1th downlink subframes of the consecutive N downlink subframes, where N is a positive integer and k1 is a minimum feedback timing interval.

It should be noted that, in the embodiment of the present invention and the optional embodiment, the consecutive N downlink subframes may include: consecutive N downlink subframes in one TDD frame, and/or may be consecutive across the boundary of the TDD frame. N downlink subframes, for example, the last N-1 consecutive downlink subframes of one TDD frame and the first downlink subframe of the next TDD frame immediately following the one TDD frame. The following downlink subframe configuration 2 is taken as an example. The consecutive N downlink subframes may include: subframes #3, #4, #5 in one TDD frame, and/or subframes #8, # in one TDD frame. 9 and the subframe #0 of the next TDD frame immediately following this TDD frame.

Optionally, when the uplink and downlink subframes are configured as the uplink and downlink subframe configuration 5, the predetermined subframe is determined to be the N-k1-1th or the last k1+2 of the consecutive N downlink subframes. A downlink subframe, where N is a positive integer and k1 is a minimum feedback timing interval.

Optionally, the predetermined subframe may be determined as a downlink subframe located at an intermediate position of consecutive N downlink subframes, where N is a positive integer, and consecutive N downlink subframes include: consecutive N downlinks in the TDD frame. Subframe, and/or, the last N-1 consecutive downlink subframes of the TDD frame and the 1st downlink subframe of the next TDD frame immediately following the TDD frame. That is, in the case where N is an odd number, the predetermined subframe is the first of the N downlink subframes.

Downstream subframes, where

The rounding up operator is used; if N is an even number, the predetermined subframe is the N/2th downlink subframe or the (N/2)+1th downlink subframe of the N downlink subframes.

Optionally, when the predetermined subframe is multiple subframes, a single predetermined subframe may be determined in a predefined manner, and then multiple consecutive downlink subframes except for the downlink subframe that has been determined to be the predetermined subframe. Or determine the next predetermined subframe in the special subframe, and so on. For example, the first subframe included in the predetermined subframe may be determined in a predefined manner, and then the first subframe included in the predetermined plurality of downlink subframes or the special subframes except the first subframe is determined. Two sub-frames.

It should be noted that, in the embodiment of the present invention and the optional embodiment, the minimum feedback timing interval k1 may be set to 0 or 1 or 2 or 3 or 4 as needed.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases It is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In the embodiment, an uplink control channel sending apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

5 is a structural block diagram of an uplink control channel transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes: a transmitting module 52 configured to transmit in one or more predetermined subframes of a time division duplex TDD frame. And an uplink control channel, where the uplink control channel is used to carry feedback information on the downlink traffic channel, and the predetermined subframe includes at least one of the following: a special subframe and a downlink subframe.

Optionally, the sending module 52 may be configured to: send an uplink control channel on the inverse M orthogonal frequency division multiplexing OFDM symbols of each subframe in one or more predetermined subframes of the TDD frame, where M is positive Integer.

FIG. 6 is a block diagram of an optional structure of an uplink control channel transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus further includes: a determining module 62 coupled to the sending module 52, configured to pass the pre- The manner of definition and/or the base station sends a configuration signaling manner to determine a predetermined subframe.

Optionally, the determining module 62 may be configured to implicitly determine the predetermined subframe according to the uplink and downlink subframe configuration and the minimum feedback timing interval of the TDD frame.

Optionally, the determining module 62 may be configured to: when the uplink and downlink subframes are configured as the uplink and downlink subframe configuration 2, determine that the predetermined subframe is a downlink subframe immediately after the uplink subframe, where the uplink subframe includes One of the following: one uplink subframe in the first half frame or the second half frame of the TDD frame, and two uplink subframes in the TDD frame.

Optionally, the determining module 62 may be configured to determine that the predetermined subframe is the N-k1 or the last k1+1th downlink subframe in the consecutive N downlink subframes, where N is a positive integer, and k1 is Minimum feedback timing interval.

Optionally, the determining module 62 may be configured to: when the uplink and downlink subframes are configured as the uplink and downlink subframe configuration 5, determine that the predetermined subframe is the N-k1-1th of the consecutive N downlink subframes or The last k1+2 downlink subframes, where N is a positive integer and k1 is a minimum feedback timing interval.

Optionally, the determining module 62 may be configured to determine that the predetermined subframe is a downlink subframe located at an intermediate position of consecutive N downlink subframes, where N is a positive integer, and consecutive N downlink subframes include: a TDD frame The consecutive N downlink subframes, and/or the last N-1 consecutive downlink subframes of the TDD frame and the 1st downlink subframe of the next TDD frame immediately following the TDD frame. That is, in the case where N is an odd number, the predetermined subframe is the first of the N downlink subframes.

Downstream subframes, where

FIG. 7 is a second block diagram of an optional structure of an uplink control channel transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 7, the determining module 62 includes: a first determining unit 72 and a second determining unit 74, where The first determining unit 72 is configured to determine, by a predefined manner, a first subframe included in the predetermined subframe; the second determining unit 74 is coupled to the first determining unit 72, and is configured to be continuous except for the first subframe. In the plurality of downlink subframes or in the special subframe, the second subframe included in the predetermined subframe is determined.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

Embodiments of the present invention also provide a software for performing the technical solutions described in the above embodiments and preferred embodiments.

Embodiments of the present invention also provide a storage medium. In this embodiment, the above storage medium may be configured to store program code for performing the following steps:

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

In order to make the description of the embodiments of the present invention more clear, the following description and description are made in conjunction with the exemplary embodiments.

An alternative embodiment of the present invention provides an uplink control channel transmission method and apparatus. The optional embodiment of the present invention can retransmit the fast hybrid automatic request of the downlink service data, which overcomes the problem that the feedback timing delay of the TDD system existing in the prior art is large and limited by the uplink and downlink subframe configuration, and can be determined. Quick feedback resources.

The uplink control channel sending method provided by the optional embodiment of the present invention may transmit an uplink control channel for carrying feedback information on a downlink traffic channel on a reciprocal M OFDM symbols of one or more predetermined subframes of the TDD frame. The predetermined subframe includes at least one of the following: a special subframe and a downlink subframe.

Optionally, in different uplink and downlink subframe configurations of the TDD frame, on the last M OFDM symbols in one or more downlink subframes, or uplink pilot slots in one or two special subframes (Up Pilot) Time Slot (abbreviated as UpPTS) on the inverse M (for example, 1-2) OFDM symbols, used as an enhanced uplink control channel (EPUCCH) or enhanced uplink traffic channel (EPUSCH) transmission for carrying feedback information on the PDSCH (ACK/ NACK) The uplink control channel, where the value of M can be one of the elements {1, 2, 3, 4, 5, 6, 7}. That is, after receiving the downlink service information, the terminal transmits feedback information about whether the downlink service information is correct or not (ACK/NACK) in the PUCCH/PUSCH or the EPUCCH/EPUSCH, where the PUCCH/PUSCH is occupied by one in the normal uplink subframe. Uplink control letter of subframe time length The channel/uplink traffic channel, EPUCCH/EPUSCH, is used as the enhanced uplink control channel/enhanced uplink traffic channel in the Up MTS in the UpPTS in the normal downlink subframe or the special subframe.

When the predetermined subframe is a special subframe, for the TDD frame configuration of the 5ms uplink and downlink conversion interval, when the predetermined subframe is only one in one radio frame, the special subframe in the first half frame or the second half frame may be selected. When there are two predetermined subframes in one radio frame, the special subframes in the first half frame and the second half frame are simultaneously selected; for the configuration of the 10 ms uplink and downlink transition interval, the predetermined subframe is a special subframe in the radio frame.

Optionally, the foregoing predetermined subframe may be determined by one of the following manners: a predefined manner, and a base station sends a configuration signaling manner.

Optionally, in a case where the foregoing predetermined subframe is determined by a fixed/predefined manner, the predetermined subframe may be implicitly determined according to different uplink and downlink subframe configurations and a minimum feedback timing interval k1.

Optionally, the foregoing predetermined subframe may be uniquely determined if the uplink and downlink subframe configuration and the minimum feedback timing interval are constant. Wherein, when the minimum feedback timing interval is a fixed value, the fixed value may be the same as the feedback timing interval of the FDD system.

Optionally, for the uplink and downlink subframe configuration 2, the foregoing predetermined subframe may be a downlink subframe immediately after the uplink subframe. The uplink subframe is at least one of: one uplink subframe in the first half frame or the second half frame in the radio frame, and two uplink subframes in the entire radio frame.

Optionally, for the uplink and downlink subframe configuration 2, when a downlink subframe is selected as the foregoing predetermined subframe, in addition to the existing uplink subframe, the downlink subframe immediately after the uplink subframe in the first half frame, or It is the downlink subframe immediately after the uplink subframe in the second half frame. When two downlink subframes are selected as the foregoing predetermined subframe, the predetermined subframe is a downlink subframe immediately after the uplink subframe in the first half frame and a downlink subframe immediately after the uplink subframe in the second half frame.

Optionally, for the uplink and downlink subframe configuration 2 or the uplink and downlink subframe configuration 3 or the uplink and downlink subframe configuration 4 or the uplink and downlink subframe configuration 5, the predetermined subframe may be the last in the consecutive N downlink subframes. K1+1 subframes. That is, the number of consecutive downlink subframes is N, and the predetermined subframe is the N-k1th of consecutive downlink N subframes. The consecutive downlink subframes are consecutive downlink subframes that can be separated from the uplink frame by the uplink subframe and/or the special subframe.

Optionally, for the uplink and downlink subframe configuration 5, the predetermined subframe may be a k1+2th subframe in a consecutive N downlink subframes. That is, the number of consecutive downlink subframes is N, and the predetermined subframe position is the N-k1-1th of the consecutive downlink N subframes. The consecutive downlink subframes are consecutive downlink subframes that can be separated from the uplink frame by the uplink subframe and/or the special subframe.

Optionally, when the predetermined subframe is determined in a predefined manner, the predetermined subframe may be an intermediate position of consecutive downlink subframes. That is, when the number of consecutive downlink subframes is N and N is an odd number, the foregoing predetermined subframe may be the first in the continuous downlink subframe.

For a downlink subframe, when N is an even number, the predetermined subframe may be the N/2th downlink subframe in the consecutive downlink subframe or the N/2+1th downlink subframe in the consecutive downlink subframe.

Optionally, when the predetermined subframe is a plurality of subframes (greater than or equal to 2), after determining a single subframe, and then continuing Select from the downlink subframe or special subframe. Two ways of selecting a plurality of predetermined subframes will be described and described below.

In the first mode, the number of consecutive downlink subframes is N, and the predetermined subframe is the N-k1th of the consecutive downlink N subframes. The consecutive downlink subframes are consecutive downlink subframes that can be spanned by the uplink subframe and/or the special subframe that can span the radio frame. Optionally, when a downlink subframe is selected as the predetermined subframe, the predetermined subframe is the N-k1th of the consecutive N downlink subframes. When two downlink subframes are selected as the foregoing predetermined subframe, the first downlink subframe is selected as described above, and then selected in the second consecutive downlink subframe or the special subframe except the first downlink subframe. Two downlink subframes or special subframes, where the second consecutive downlink subframe is a group of consecutive downlink subframes that are not spaced apart by the uplink subframe and/or the special subframe and the first downlink subframe. The number of the second consecutive downlink subframes is N2, and the second downlink subframe is selected as the N2-th1 of the consecutive N2 downlink subframes. If there are two sets of the second consecutive downlink subframes, the number of the two consecutive downlink subframes is the same. Or select a second downlink subframe whose subframe number is smaller or larger in the radio frame. A similar method is adopted when three or more predetermined subframes are selected, and details are not described herein again.

In the second mode, when a downlink subframe is selected as the predetermined subframe, when the number of consecutive downlink subframes is N and N is an odd number, the predetermined subframe is the first in the continuous downlink subframe.

When the N is an even number, the predetermined subframe is the N/2th downlink subframe in the consecutive downlink subframe or the N/2+1th downlink subframe in the consecutive downlink subframe. When two downlink subframes are selected as the foregoing predetermined subframe, the first downlink subframe is selected as described above, and then selected in the second consecutive downlink subframe or the special subframe except the first downlink subframe. Two downlink subframes or special subframes, where the second consecutive downlink subframe is a group of consecutive downlink subframes that are not spaced apart by the uplink subframe and/or the special subframe and the first downlink subframe. The second consecutive downlink subframe number is N2, and when N2 is an odd number, the second downlink subframe is the second consecutive downlink subframe.

When the N is an even number, the second downlink subframe is the N2/2+1 downlink subframe in the second consecutive downlink subframe or the N2/2+1 downlink subframe in the second consecutive downlink subframe If there are two sets of the second consecutive downlink subframes, the number of the second consecutive downlink subframes is the same, or the second downlink subframe with the smaller or larger subframe number in the radio frame is selected. When three or more are selected, a similar method is adopted, and details are not described herein again.

Optionally, the base station configuration manner may include: a high layer signaling SIB configuration or an RRC configuration or a physical layer signaling DCI configuration.

Optionally, when the signaling configuration is used, the configuration manner may include: 1. configuring, by using an integer multiple of a radio frame or a radio frame, a downlink subframe and/or a special subframe by using 10*N bits. The predetermined subframe, for example, uses a 10-bit configuration with one radio frame as a basic unit and a 40-bit configuration with 4 radio frames as a basic unit. 2. It may be configured according to different uplink and downlink subframe configurations, using the number of bits corresponding to the number of subframes remaining after the uplink subframe and/or the special subframe, or may be configured based on an integer multiple of the radio frame. 3. Predetermine the configuration of X possible possible sub-frames, use

Bit configuration One of the X configurations.

It should be noted that the embodiment and the optional embodiment of the present invention are applicable to the case where the feedback timing interval k is 1 or 2 or 3 or 4 or other positive integers, and k=2 is taken as an example for description. Considering that the hardware processing capability is increased by 50%, k=2 of the FDD system and k≥2 of the TDD system are considered for the improvement of the feedback timing interval capability. When k≥2 is taken as an example, the existing ACK/NACK feedback timing relationship is as shown in Table 2:

Table 2 TDD frame downlink association setting index K: {k ₀ , k ₁ , ... k _M-1 }

Uplink Synchronous Hybrid Automatic Repeat Request (HARQ), considering that k can be 2, you need to define the following new content:

The k2 value of n+k2 of the uplink grant (UL Grant) scheduling PUSCH is as shown in Table 3. At this time, the scheduling timing is also considered to be k2 ≥ 2.

For configuration 0, when the UL Grant (MSB of UL Index = 1), the corresponding uplink subframe is n + k2; when UL Grant (LSB of UL Index) =1), the corresponding uplink subframe is n+3.

In

subframe

0 or 5, when I_PHICH=0, the corresponding uplink subframe is n+k2; in

subframe

0 or 5, I_PHICH=1, or there is physical hybrid retransmission indication on

subframe

1 or 6. When the channel (Physical Hybrid ARQ Indicator Channel, PHICH for short), the corresponding uplink subframe is n+3; wherein, when the uplink subframe is n=3 or 8, I_PHICH=1.

Table 3 k2 values

The k3 value of the n-k3 of the downlink PHICH feedback PUSCH is as shown in Table 4. At this time, the scheduling timing is also considered to be k3 ≥ 2, and the synchronous HARQ relationship is maintained.

For configuration 0, the user equipment (UE) corresponds to the PHICH ACK/NACK received in I_PHICH=0 in subframe i, and is associated with the PUSCH transmitted in subframe i-k3 (k3 is indicated in Table 4). If the PHICH ACK/NACK is received corresponding to I_PHICH=1, it is associated with the PUSCH transmitted in the subframe i-2.

Table 4 k3 values

For the TDD uplink and downlink subframe configuration #0, #1, and #6, the feedback timing interval can be implemented as k=2, and the Round-Trip Time (RTT) is unchanged (the configuration 6 is slightly reduced). Therefore, the addition of the special subframe or the downlink subframe as the post-N symbol of the EPUCCH transmission is implemented in the uplink and

downlink subframe configuration

2, 3, 4, and 5, that is, the scenario in which the downlink subframe is more than the uplink subframe. .

In the special subframe, the UpPTS can be used for uplink ACK/NACK feedback on the PDSCH, which can reduce the DL HARQ delay. However, since the special subframe position is fixed, the effect of actually reducing the delay is not necessarily the best. The ACK/NACK transmission of the last N symbol in the downlink subframe can implement feedback on the PDSCH to achieve the optimal DL HARQ delay. effect.

The optional embodiments of the present invention are described below with reference to the accompanying drawings.

Alternative embodiment 1

An optional embodiment 1 of the present invention provides an uplink control channel sending method for uplink and downlink subframe configuration 2, and provides 8 downlink subframes (D subframes) for 2 uplink subframes (U subframes) for uplink and downlink subframe configuration. (including downlink pilot time slots (DwPTS) in 2 special subframes (S subframes)), FIG. 8 is an example of the uplink and downlink subframe configuration 2 in the case of not adding feedback resources according to an alternative embodiment of the present invention. The schematic diagram of the feedback timing interval when the frame is k≥2, the feedback timing interval of each subframe is as shown in Fig. 8. The average k value at this time is 3.75, and the average latency of one unidirectional RTT is 5.75.

FIG. 9 is a schematic diagram of feedback timing intervals when each subframe is k≥2 when the UpPTS region is used as a feedback resource in the uplink subframe configuration 2 according to an optional embodiment of the present invention, as shown in FIG. The UpPTS in the special subframe can be used for uplink PUCCH feedback on the PDSCH. For the uplink and downlink subframe configuration 2, the k values corresponding to the

subframes #

0, 1, 3, 4, 5, 6, 8, and 9 are respectively 2 , 5, 3, 3, 2, 5, 3, 3, the average k value can be 3.25, the average k value is reduced from 3.75 to 3.25, and the average one-time RTT delay is (4+7+5+5+4). +7+5+5)/8=5.25.

FIG. 10 is a schematic diagram of feedback timing intervals of each subframe when k≥2 when the uplink and downlink subframe configuration 2 increases the number of M OFDM symbol regions in the downlink subframe #3 as feedback resources according to an optional embodiment of the present invention. As shown in FIG. 10, if the last 1-2 OFDM symbols in the subframe #3 are used as the PUCCH to feed back the PDSCH, the predetermined subframe also includes the subframe #8. For the uplink and downlink subframe configuration 2, the k values corresponding to the

subframes #

0, 1, 3, 4, 5, 6, 8, and 9 are 3, 2, 4, 3, 3, 2, 4, and 3, respectively. Achieve an average k value of 3.

If the last 1-2 OFDM symbols in the subframe #4 are used as the PUCCH to feed back the PDSCH, and the predetermined subframe further includes the subframe #9, then the uplink and downlink subframe configuration 2, the

subframe #

0, 1, The k values corresponding to 3, 4, 5, 6, 8, and 9 are 4, 3, 4, 3, 4, 3, 4, and 3, respectively, and the average k value can be 3.5.

The RTT one-way delay is analyzed. For the downlink subframe #3 as the predetermined subframe, whether the uplink subframe or the subframes #3 and #8 are used as the PUCCH feedback, the fastest satisfying k≥2 requires +2 subframes. Retransmission, at this time, the average latency of a one-way RTT is 5. For the downlink subframe #4 as the predetermined subframe, whether the uplink subframe or the subframes #4 and #9 are used as the PUCCH feedback, the fastest satisfying k≥2 requires +2 subframes for retransmission, and one time one-way The average RTT delay is 5.5.

Therefore, for the uplink and downlink subframe configuration 2, the downlink subframe of the optional location in the 5 ms period is used as the subframe #3.

It can be seen that, in the optional embodiment 1 of the present invention, the uplink and downlink subframe configuration 2 is followed by the downlink subframe of the uplink subframe (that is, in subframe #3 and/or #8, or in consecutive downlink subframes). The third last downlink subframe, wherein the number of consecutive downlink subframes is N, and the predetermined subframe is the Nth downlink subframe in the consecutive downlink subframes, and the last N (for example, 1 or 2) OFDM symbols are opened. The PUCCH performs feedback on the PDSCH, and when the UpPTS is used as the PUCCH feedback in the special subframe, the minimum DL HARQ feedback delay can be achieved. That is, for the uplink and downlink subframe configuration 2, if one subframe is added with the uplink feedback, it is subframe #3 or subframe #8, and if two subframes are added, subframe #3 and subframe #8 are added. .

Alternative embodiment 2

The optional embodiment 1 of the present invention provides an uplink control channel sending method for the uplink and downlink subframe configuration 3, and for the uplink and

downlink subframe configuration

3, 3 uplink subframes feed back 7 downlink subframes (including 1 special subframe) DwPTS), FIG. 11 is a schematic diagram of the feedback timing interval of each subframe when k≥2 when the uplink and downlink subframe configuration 3 does not increase the feedback resource according to an optional embodiment of the present invention, and the timing interval of each subframe feedback is as shown in FIG. It is shown that the average k value at this time is 4.86, and the one-way average delay of one RTT is 7.28.

FIG. 12 is a schematic diagram of the feedback timing interval of each subframe when k≥2 when the UpPTS region is added as a feedback resource in the uplink subframe configuration 3 according to an optional embodiment of the present invention, as shown in FIG. The UpPTS in the special subframe can be used for uplink PUCCH feedback on the PDSCH. For the uplink and downlink subframe configuration 3, the k values corresponding to the

subframes #

0, 1, 5, 6, 7, 8, and 9 are respectively 3 and 3. 6, 5, 5, 4, 4, the average k value can be achieved 4.28, and the feedback timing of each subframe is as shown in FIG. 7. The average k value is reduced from 4.86 to 4.28, and the average RTT unidirectional delay is (5+5+10+9+8+7+6)/7=7.14.

If the last 1-2 OFDM symbols in the subframe #7 are used as the PUCCH to feed back the PDSCH, then for the uplink and downlink subframe configuration 3, the subframes corresponding to the

subframes #

0, 1, 5, 6, 7, 8, and 9 are k. The values are 4, 3, 2, 6, 5, 5, and 4, respectively, and the average k value can be 4.14. The one-way average delay of an RTT is (6+5+4+9+8+7+6)/7=6.43.

FIG. 13 is a schematic diagram of feedback timing intervals of each subframe when k ≥ 2 when the uplink and downlink subframe configuration 3 increases the number of M OFDM symbol regions in the downlink subframe #8 as feedback resources according to an optional embodiment of the present invention. As shown in FIG. 13, if the last 1-2 OFDM symbols in subframe #8 are used as the PUCCH to feed back the PDSCH, then for the uplink and downlink subframe configuration 3,

subframes #

0, 1, 5, 6, 7, 8 The corresponding k values of 9 and 9 are 3, 3, 3, 2, 5, 4, and 4, respectively, and the average k value can be 3.43, and the one-way average delay of one RTT is (5+5+5+4+8+7). +6) / 7 = 5.71.

It can be seen that, in the optional second embodiment of the present invention, for the uplink and downlink subframe configuration 3, in the subframe #8 (that is, the third downlink subframe in the consecutive downlink subframe including the subframe #0, or the sub-frame The number of consecutive downlink subframes of frame #0 is N, and the predetermined subframe is the N-2th. The last 1-2 OFDM symbols are used as the PUCCH to feed back the PDSCH, and the UpPTS is used as the PUCCH feedback in the special subframe. The minimum DL HARQ feedback delay can be achieved when comparing the same resources.

Alternative embodiment three

An optional embodiment 1 of the present invention provides an uplink control channel sending method of the uplink and downlink subframe configuration 4, where 4 uplink subframes are fed back, and 2 uplink subframes are fed back to 8 downlink subframes (including one special subframe). DwPTS), FIG. 14 is a schematic diagram of the feedback timing interval of each subframe when k≥2 when the uplink and downlink subframe configuration 4 does not increase the feedback resource according to an optional embodiment of the present invention, and the timing interval of each subframe feedback is as shown in FIG. It is shown that the average k value at this time is 5, and the one-time average delay of one RTT is 7.

FIG. 15 is a schematic diagram of a feedback timing interval when each subframe is k≥2 when the UpPTS region is added as a feedback resource in the uplink subframe configuration 4 according to an optional embodiment of the present invention, as shown in FIG. The UpPTS in the special subframe can be used for uplink PUCCH feedback on the PDSCH. For the uplink and downlink subframe configuration 4, the k values corresponding to the

subframes #

0, 1, 4, 5, 6, 7, 8, and 9 are respectively 3 2, 7, 6, 5, 5, 4, 3, the average k value can be 4.375, the average k value is reduced from 5 to 4.375, and the average RTT one-way average delay is (5+4+10+9+8). +7+6+5)/8=6.75.

16 is a schematic diagram of feedback timing intervals of each subframe when k ≥ 2 when the uplink and downlink subframe configuration 4 increases the number of M OFDM symbol regions in the downlink subframe #8 as feedback resources according to an alternative embodiment of the present invention, such as As shown in FIG. 16, if the last 1-2 OFDM symbols in subframe #8 are used as the PUCCH to feed back the PDSCH, then for the uplink and downlink subframe configuration 4,

subframes #

0, 1, 4, 5, 6, 7 The k values corresponding to 8, 8 and 9 are 3, 2, 4, 3, 2, 5, 4, and 3, respectively. The average k value can be 3.25, and the average RTT of one RTT is (5+4+6+5). +4+7+6+5)/8=5.25.

If the last 1-2 OFDM symbols in subframe #9 are used as the PUCCH to feed back the PDSCH, then for the uplink and downlink subframe configuration 4, the

subframes #

0, 1, 4, 5, 6, 7, 8, and 9 correspond to The k values are 3, 2, 5, 4, 3, 5, 4, and 3, and the average k value can be 3.625. The average RTT unidirectional delay is (5+4+7+6+5+7+). 6+5)/8=5.625.

It can be seen that, in the optional third embodiment of the present invention, for the uplink and downlink subframe configuration 4, in the subframe #8 (that is, the third downlink subframe in the consecutive downlink subframe including the subframe #0, or the sub-frame The number of consecutive downlink subframes of frame #0 is N, and the predetermined subframe is the N-2th of consecutive downlink subframes. The last 1-2 OFDM symbols are used as PUCCH to feed back the PDSCH, and the special subframe is used. When the UpPTS is used as the PUCCH feedback for the same amount of resources comparison, the minimum DL HARQ feedback delay can be achieved.

Alternative embodiment four

An optional embodiment 1 of the present invention provides an uplink control channel sending method of the uplink and downlink subframe configuration 5, and for the uplink and downlink subframe configuration 5, one uplink subframe returns 9 downlink subframes (including one special subframe). DwPTS), FIG. 17 is a schematic diagram of the feedback timing interval of each subframe when k≥2 when the uplink and downlink subframe configuration 5 does not increase the feedback resource according to an optional embodiment of the present invention, and the timing interval of each subframe feedback is as shown in FIG. It is shown that the average k value at this time is 6.11, and the one-time average delay of one RTT is 8.8. At this point, the number of processes is 11. The longest process starts with subframe #1.

FIG. 18 is a schematic diagram of the feedback timing interval of each subframe when k≥2 when the UpPTS region of the special subframe is used as a feedback resource according to an alternative embodiment of the present invention, as shown in FIG. The UpPTS can be used for uplink PUCCH feedback on the PDSCH. For the uplink and downlink subframe configuration 5, the k values corresponding to the

subframes #

0, 1, 3, 4, 5, 6, 7, 8, and 9 are 2, 10, respectively. 8, 7, 6, 5, 5, 4, 3, the average k value can be achieved is 5.55, and the feedback timing of each subframe is as shown in FIG. The average k value is reduced from 6.11 to 5.55, and the average RTT unidirectional delay is (12+10+9+8+7+7+6+5+4+12)/10=8. At this point, the number of processes is 10. The longest process starts with subframe #1.

If the last 1-2 OFDM symbols in subframe #7 are used as the PUCCH to feed back the PDSCH, then for the uplink and downlink subframe configuration 5,

subframes #

0, 1, 3, 4, 5, 6, 7, 8, The corresponding k values of 9 are 2, 6, 4, 3, 2, 6, 5, 4, and 3, respectively, and the average k value can be 3.88, and the one-way average delay of one RTT is (4+8+6+5+). 4+8+7+6+5)/9=5.88.

FIG. 19 is a schematic diagram of a feedback timing interval when each subframe is k≥2 when the uplink and downlink subframe configuration 5 increases the number of M OFDM symbol regions in the downlink subframe #8 as a feedback resource according to an alternative embodiment of the present invention. As shown in FIG. 19, if the last 1-2 OFDM symbols in the subframe #8 are used as the PUCCH to feed back the PDSCH, the

subframes #

0, 1, 3, 4, 5, and 6 are configured for the uplink and downlink subframes. The k values corresponding to 7, 8, and 9 are 2, 7, 5, 4, 3, 2, 5, 4, and 3, respectively, and the average k value can be 3.88, and the one-time average delay of one RTT is (4+9). +7+6+5+4+7+6+5)/9=5.88.

If the last 1-2 OFDM symbols in subframe #9 are used as the PUCCH to feed back the PDSCH, then for the uplink and downlink subframe configuration 5,

subframes #

0, 1, 3, 4, 5, 6, 7, 8, The corresponding k values of 9 are 2, 8, 6, 5, 4, 3, 5, 4, and 3, respectively, and the average k value can be 4.44, and the one-way average delay of one RTT is (4+10+8+7+). 6+5+7+6+5)/9=6.44.

It can be seen that, in the optional embodiment 4 of the present invention, for the uplink and downlink subframe configuration 5, in the subframe #7 or #8 (that is, the third downlink subframe or the reciprocal of the last downlink subframe including the subframe #0) The fourth downlink subframe, or the number of consecutive downlink subframes including the subframe #0 is N, and the predetermined subframe is the N-2th downlink subframe in the consecutive downlink subframe or the N-3th in the continuous downlink subframe. The downlink OFDM symbols are used as the PUCCH to feed back the PDSCH. When the UpPTS is used as the PUCCH feedback in the special subframe, the minimum DL HARQ feedback delay can be achieved. At this time, the subframe #7 is the downlink subframe in the middle of the continuous downlink subframe, and the subframe #8 can also achieve the optimal feedback delay.

In summary, the uplink control channel sending method and apparatus provided by the embodiment and the optional embodiment of the present invention are compared with the prior art, by increasing the uplink control for carrying the downlink traffic channel feedback (ACK/NACK). The transmission resources of the channel achieve the effect of fast feedback in the TDD system, and reduce the end-to-end delay of the terminal with low delay requirements.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Claims

An uplink control channel sending method includes:

And transmitting an uplink control channel in one or more predetermined subframes of the time division duplex TDD frame, where the uplink control channel is used to carry feedback information on a downlink traffic channel, where the predetermined subframe includes at least one of the following: Subframe, downlink subframe.
The method of claim 1, wherein transmitting the uplink control channel in one or more of the predetermined subframes of the TDD frame comprises:

Transmitting the uplink control channel on a last M orthogonal frequency division multiplexed OFDM symbols of each of the one or more of the predetermined subframes of the TDD frame, where M is a positive integer.
The method of claim 1, wherein before the transmitting the uplink control channel in one or more of the predetermined subframes of the TDD frame, the method further comprises:

The predetermined subframe is determined by a predefined manner and/or a base station transmitting a configuration signaling manner.
The method of claim 3, wherein determining the predetermined subframe by the predefined manner comprises:

The predetermined subframe is implicitly determined according to an uplink and downlink subframe configuration and a minimum feedback timing interval of the TDD frame.
The method according to claim 4, wherein, in the case that the uplink and downlink subframes are configured as uplink and downlink subframe configuration 2, determining the predetermined subframe comprises:

Determining that the predetermined subframe is a downlink subframe immediately after the uplink subframe, where the uplink subframe includes one of: an uplink subframe of the first half frame or the second half frame of the TDD frame, Two uplink subframes in a TDD frame.
The method of claim 4 wherein determining the predetermined subframe comprises:

Determining that the predetermined subframe is the N-k1 or the last k1+1th downlink subframe in consecutive N downlink subframes, where N is a positive integer and k1 is the minimum feedback timing interval.
The method according to claim 4, wherein, in a case where the uplink and downlink subframe is configured as an uplink and downlink subframe configuration 5, determining the predetermined subframe includes:

Determining that the predetermined subframe is an Nth-k1-1th or a last k1+2th downlink subframe in consecutive N downlink subframes, where N is a positive integer and k1 is the minimum feedback timing interval.
The method of claim 3, wherein determining, by the predefined manner, the predetermined subframe comprises:

Determining that the predetermined subframe is a downlink subframe located at an intermediate position of consecutive N downlink subframes, where N is a positive integer.
The method of claim 8 wherein

In the case where N is an odd number, the predetermined subframe is the first of the N downlink subframes
Downlink subframes, where
Round up the operator;

In the case where N is an even number, the predetermined subframe is the N/2th downlink subframe or the (N/2)+1th downlink subframe of the N downlink subframes.
The method according to any one of claims 3 to 9, wherein determining, by the predefined manner, the predetermined subframe comprises:

Determining, by the predefined manner, a first subframe included in the predetermined subframe;

Determining, in a consecutive plurality of downlink subframes other than the first subframe or a special subframe, a second subframe included in the predetermined subframe.
An uplink control channel sending apparatus includes:

a sending module, configured to send an uplink control channel in one or more predetermined subframes of the time division duplex TDD frame, where the uplink control channel is used to carry feedback information on a downlink traffic channel, where the predetermined subframe includes the following At least one of: a special subframe, a downlink subframe.
The apparatus of claim 11 wherein said transmitting module is configured to:

Transmitting the uplink control channel on a last M orthogonal frequency division multiplexed OFDM symbols of each of the one or more of the predetermined subframes of the TDD frame, where M is a positive integer.
The apparatus of claim 11 wherein said apparatus further comprises:

The determining module is configured to determine the predetermined subframe by using a predefined manner and/or a base station sending a configuration signaling manner.
The apparatus of claim 13 wherein said determining module comprises:

a first determining unit, configured to determine, by using the predefined manner, a first subframe included in the predetermined subframe;

And a second determining unit, configured to determine, in a consecutive multiple downlink subframes or special subframes other than the first subframe, a second subframe included in the predetermined subframe.