WO2017080430A1

WO2017080430A1 - Redundancy version, and change cycle determination and channel estimation method and device therefor

Info

Publication number: WO2017080430A1
Application number: PCT/CN2016/105005
Authority: WO
Inventors: 高雪娟; 邢艳萍
Original assignee: 电信科学技术研究院
Priority date: 2015-11-13
Filing date: 2016-11-08
Publication date: 2017-05-18

Abstract

Disclosed are a redundancy version, and a change cycle determination and channel estimation method and device therefor, which are used to determine a change cycle of a redundancy version adopted in data transmission. The present application provides a method for determining a change cycle of a redundancy version, comprising: determining time-division duplex (TDD) uplink/downlink configuration; and according to the TDD uplink/downlink configuration, determining the change cycle of a redundancy version adopted in a data transmission process.

Description

Redundancy version and determination of its change period, channel estimation method and device

This application is required to be submitted to the China Patent Office on November 18, 2015, the application number is 201510795898.0, the invention name is “redundancy version and determination of the change period, channel estimation method and device” and submitted to China on November 13, 2015. The Patent Office, Application No. 201510780875.

Technical field

The present application relates to the field of communications technologies, and in particular, to a redundancy version, a determination period thereof, and a channel estimation method and apparatus.

Background technique

With the rise of the Internet of Things, support for Machine Type Communication (MTC) in the Long Term Evolution (LTE) is gaining more and more attention. A physical layer enhancement project for MTC was established in 3GPP Release 13. An MTC device (MTC terminal) may have some of the characteristics of a variety of machine-to-machine (M2M) communication features, such as low mobility, small amount of transmitted data, insensitivity to communication delay, and extremely low requirements. Features such as power consumption. Among them, in order to reduce the cost of the MTC terminal, a low complexity MTC will be newly defined, and both uplink and downlink support only narrow frequency band transmission, for example, support 1.4 MHz radio frequency bandwidth.

In existing networks, operators find terminals that work in some scenarios, such as terminals working in basements, shopping malls, or building corners. Because wireless signals are severely blocked, signals are greatly attenuated and cannot communicate with the network. The deep coverage of the network in these scenarios will greatly increase the network construction cost. After testing, it is considered that there is a need to enhance the existing coverage to a certain extent. To achieve coverage enhancement, a more feasible method is to use repeated transmission or similar technology to the existing channel. In theory, a certain degree of coverage gain can be obtained by performing tens to hundreds of repeated transmissions on the existing physical channel.

In the prior art, the traffic channel, for example, the Physical Uplink Shared CHannel (PUSCH) carrying the uplink service and the Physical Downlink Shared Channel (PDSCH) carrying the downlink service may be different in data transmission. Different redundancy versions (RV, Redundancy Version) are used in the subframe.

For example, for downlink data transmission, the coding unit processes the transport block arriving within a Transmission Time Interval (TTI), and then performs physical channel processing on the corresponding physical resource, as shown in FIG. . The processing of each TTI is independent. The transport block processing flow includes rate matching, and the rate matching process includes sub-block interleaving, bit collection, and bit selection, as shown in FIG. 2 . The bit selection selects the output bit stream according to the redundancy version. For the downlink, the redundancy version is in the downlink control information (DCI, Downlink Control). Indicated in Information).

For uplink data transmission, there are two methods of single subframe transmission and TTI bundling. The process of the single-subframe transmission is basically similar to that of the downlink. The redundancy version of the uplink transmission is determined by the parameter CURRENT_IRV of the Medium Access Control (MAC) layer, which is used to indicate the sequence number in the redundancy version sequence, each time mixed. CURRENT_IRV is incremented by 1 (HARQ, Hybrid Automatic Repeat reQuest) transmission (new transmission or retransmission), and CURRENT_IRV is modulo 4. The order of the redundancy version sequence is fixed to 0, 2, 3, 1. The uplink TTI bundling is a transmission method for enhancing uplink coverage, and transmits a different redundancy version of a transport block in multiple consecutive subframes (TTIs), and the redundancy version order is fixed to 0, 2, 3, 1.

In the low complexity MTC system, different redundancy versions are also required during repeated transmission to improve transmission performance. In order to reduce the number of repetitions as much as possible, so as to minimize the degradation of the spectral efficiency of the system due to repetition, it is found that cross-subframe channel estimation is an effective means. The so-called cross-subframe channel estimation refers to performing joint channel estimation based on reference signals in a plurality of consecutive subframes by using channel correlation. A typical processing method is to weight-average the results of channel estimation of multiple subframes. Accordingly, the data portions are coherently combined. The premise of coherent combining is that the transmitted signals in the multiple subframes used for merging are the same. However, considering that the redundancy version in the prior art is changed from subframe to subframe, the data information of different redundancy versions is different, and coherent combining cannot be performed. Therefore, a method of changing the redundancy version according to a fixed period is proposed, thereby ensuring partial contiguous sub-segments. The same redundancy version is used in the frame for coherent combining.

However, how to determine the change cycle of the redundancy version has not yet given a clear solution.

Summary of the invention

The embodiment of the present application provides a method for determining a redundancy version and a change period thereof, and a channel estimation method and apparatus for implementing a change period of a redundancy version used for data transmission.

A method for determining a redundancy version change period provided by the embodiment of the present application includes:

Determine the time division duplex TDD uplink and downlink configuration;

According to the TDD uplink and downlink configuration, a change period of the redundancy version adopted in the data transmission process is determined.

Through the method, the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration.

Preferably, the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

Determining, by the change period of the redundancy version used by the uplink transmission, the total number of uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the uplink transmission, which is a divisor or a multiple of the total number of uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the uplink transmission, where the number of consecutive uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the uplink transmission, which is a divisor or multiple of the number of consecutive uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, and the number of consecutive uplink subframes or the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, which is a divisor or a multiple of the number of consecutive uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, which is a divisor or a multiple of the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the uplink transmission, where the total number of uplink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used in the uplink transmission, where the number of consecutive uplink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used for the uplink transmission in one field, and the minimum or common number of consecutive uplink subframes and the agreed value included in the field corresponding to the TDD uplink and downlink configuration Or a common multiple;

Or determining a change period of the redundancy version used for the uplink transmission in one field, the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration, and the minimum or common divisor of the agreed value or common multiple.

Determining, by the change period of the redundancy version used by the downlink transmission, the total number of downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the downlink transmission, which is a divisor or a multiple of the total number of downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, where the number of consecutive downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, which is a divisor or a multiple of the number of consecutive downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, and the number of consecutive downlink subframes or the number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, which is a divisor or multiple of the number of consecutive downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, for the TDD uplink and downlink Configuring a divisor or multiple of the total number of downlink subframes included in the field corresponding to the subframe;

Or determining, according to the change period of the redundancy version used by the downlink transmission, the number of consecutive downlink subframes included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the downlink transmission, which is a divisor or a multiple of the number of consecutive downlink subframes included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, where the total number of downlink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used in the downlink transmission, where the number of consecutive downlink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used for the downlink transmission in one field, and the total number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration and the minimum or common divisor of the agreed value or common multiple;

Or determining a change period of the redundancy version used for the downlink transmission in one field, the minimum number of consecutive downlink subframes included in the half frame corresponding to the TDD uplink and downlink configuration, and a minimum or common divisor of the agreed value Or a common multiple;

Or determining a change period of the redundancy version used in the downlink transmission, which is a minimum value or a common number or a common multiple of the consecutive downlink subframes and the agreed value included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration.

When the TDD uplink and downlink configuration is configured as 0, it is determined that the change period of the redundancy version adopted by the uplink transmission is 6; and/or,

When the TDD uplink and downlink configuration is configured as 1, it is determined that the change period of the redundancy version adopted by the uplink transmission is 4; and/or,

When the TDD uplink and downlink configuration is configured as 2 or 4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 3, determining that the redundancy version of the uplink transmission has a change period of 3; and/or,

When the TDD uplink and downlink configuration is configured as 5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version adopted for the uplink transmission is determined to be 5.

When the TDD uplink and downlink configuration is configured as 0 or 3, it is determined that the change period of the redundancy version adopted by the uplink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 1 or 4, determining a change period of the redundancy version adopted by the uplink transmission Is 2; and / or,

When the TDD uplink and downlink configuration is configured as 2 or 5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version used for the uplink transmission is determined to be 2 or 3, or the first half frame and the second half frame are 2 in one radio frame.

When the TDD uplink and downlink configuration is configured as 3, it is determined that the change period of the redundancy version used in the downlink transmission is 7, or the first half frame in one radio frame is 2, the second half frame is 5, or, in a wireless 3 in the

subframes

5, 6, and 7 in the frame, 4 in the

subframes

8, 9 in one radio frame, and 4, 1 in the next radio frame, or a sub-frame in a radio frame 4 in

frames

5, 6, 7, 8 is 3 in subframe 9 in one radio frame and

subframe

0, 1 in the next radio frame; and/or,

When the TDD uplink and downlink configuration is configured as 4, the change period of the redundancy version used for determining the downlink transmission is 8 or 4 or 2; and/or,

When the TDD uplink and downlink configuration is configured as 5, it is determined that the change period of the redundancy version adopted by the downlink transmission is 9 or 3.

When the TDD uplink and downlink configuration is configured as 0, it is determined that the change period of the redundancy version adopted by the downlink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 1, the change period of the redundancy version used for determining the downlink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 2, it is determined that the change period of the redundancy version adopted by the downlink transmission is 4 or 2; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version used for determining the downlink transmission is 2 or 3, or 2, in the

subframes

5 and 6 of one radio frame, 2, in one radio frame. Subframe 9 and

subframes

0 and 1 in the next radio frame are 3.

Preferably, the agreed value is a pre-agreed or configured constant, or a number of subframes used for multi-subframe channel estimation for a frequency hopping period of uplink transmission and/or uplink.

Preferably, the agreed value is a pre-agreed or configured constant, or a number of subframes used for the hopping period of the downlink transmission and/or the multi-subframe channel estimation for the downlink.

Preferably, the common divisor is the greatest common divisor, and the common multiple is the least common multiple.

A channel estimation method provided by an embodiment of the present application includes:

Determining the change period of the redundancy version used in the data transmission process;

Determining, according to the change period, a number of subframes to be used when performing multi-subframe channel estimation;

Multi-subframe channel estimation is performed using the subframes of the number of subframes.

Preferably, determining the number of subframes to be used when performing multi-subframe channel estimation according to the change period includes:

Determining a number of subframes to be used when performing multi-subframe channel estimation, which is a minimum value of the change period and a preset constant;

Or, determining the number of subframes to be used when performing multi-subframe channel estimation is the change period.

Preferably, the preset constant is 2 or 3 or 4;

Or the preset constant is a number of subframes in a radio frame used for transmitting the same transport block TB;

Or the preset constant is a number of consecutive subframes starting from a first subframe for transmitting the same TB in one radio frame;

Alternatively, the preset constant is the number of consecutive subframes starting from the first subframe for transmitting the same TB in one field.

Preferably, the determining the change period of the redundancy version used in the data transmission process comprises: determining the change period of the redundancy version used in the data transmission process by using the determining method of the redundancy version change period.

A redundancy version determining method provided by an embodiment of the present application includes:

Determining, according to the change period and the redundancy version sequence pattern, a redundancy version change pattern, where the first radio frame is a pre-agreed or configured radio frame, starting from a first subframe in the first radio frame. The first subframe is a pre-agreed or configured subframe;

And determining, according to the redundancy version change pattern and the radio frame number and the subframe number of the current transmission subframe, a redundancy version corresponding to the data transmission in the current transmission subframe.

Preferably, the redundancy version change pattern is determined by using the first subframe in the first radio frame as a starting point according to the change period and the redundancy version sequence pattern, and specifically includes:

Setting the change period to T, starting from the first subframe in the first radio frame, changing the redundancy version every T first subframes, and changing the redundancy version according to the redundancy version sequence pattern;

Or, the change period is T, starting with the first subframe in the first radio frame, starting with the first first-type subframe in each radio frame, and changing every T first-type subframes One redundancy version, the redundancy version is changed according to the redundancy version sequence pattern;

Or, the change period is T, starting with the first subframe in the first radio frame, starting with the first first type subframe in each field, and changing every T first type subframe One redundancy version, the redundancy version is changed according to the redundancy version sequence pattern;

For the uplink transmission, the first type of subframe is an uplink subframe, and for downlink transmission, the first type of subframe is a downlink subframe.

Preferably, the first radio frame is a radio frame with a radio frame number of 0; and/or,

For uplink transmission, the first subframe is the first uplink subframe in one radio frame, or the first uplink subframe in one subframe; and/or,

For downlink transmission, the first subframe is the first downlink subframe in one radio frame, or the first downlink subframe in one subframe, or the first uplink subframe in one radio frame. The first downlink subframe after that, or the first downlink subframe in the latter half of a radio frame.

The apparatus for determining a redundancy version change period provided by the embodiment of the present application includes:

The first unit is configured to determine a time division duplex TDD uplink and downlink configuration;

And a second unit, configured to determine, according to the TDD uplink and downlink configuration, a change period of the redundancy version used in the data transmission process.

Preferably, the second unit is specifically configured to:

Or determining a change period of the redundancy version used for downlink transmission in one field, which is a divisor or multiple of the total number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Preferably, the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 2/4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

Preferably, the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 0/3, it is determined that the change period of the redundancy version adopted by the uplink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 1/4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured to be 2/5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

Preferably, the second unit is specifically configured to:

subframes

5, 6, and 7 in the frame, 4 in the

subframes

frames

5, 6, 7, 8 is 3 in subframe 9 in one radio frame and

subframe

0, 1 in the next radio frame; and/or,

Preferably, the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 0, determining that the redundancy version of the downlink transmission has a change period of 2; and / or,

subframes

5 and 6 of one radio frame, 2, in one radio frame. Subframe 9 and

subframes

0 and 1 in the next radio frame are 3.

A channel estimation apparatus provided by an embodiment of the present application includes:

a change period determining unit, configured to determine a change period of a redundancy version adopted in the data transmission process;

a subframe number determining unit, configured to determine, according to the change period, a number of subframes that are used when performing multi-subframe channel estimation;

And a channel estimation unit, configured to perform multi-subframe channel estimation by using the subframe of the subframe number.

Preferably, the subframe number determining unit is specifically configured to: determine a number of subframes to be used when performing multi-subframe channel estimation, which is a minimum value of the change period and a preset constant;

Preferably, the preset constant is 2 or 3 or 4;

Preferably, the change period determining unit is a determining device for the redundancy version change period.

A redundancy version determining apparatus provided by an embodiment of the present application includes:

a redundancy version determining unit, configured to determine, according to the change period and the redundancy version order pattern, a redundancy version change pattern by using a first subframe in the first radio frame as a starting point, where the first radio frame is a pre-agreed or configured radio frame, the first subframe is a pre-agreed or configured sub-frame, and the pattern and the current number are changed according to the redundancy version. The redundancy version corresponding to the data transmission in the current transmission subframe is determined according to the radio frame number and the subframe number corresponding to the transmission.

Preferably, the redundancy version determining unit determines the redundancy version change pattern based on the change period and the redundancy version sequence pattern, starting with the first subframe in the first radio frame, and specifically includes:

An apparatus provided by an embodiment of the present application includes a processor and a memory, wherein a preset program is stored in the memory, and the processor reads a program in the memory, and executes the following process according to the program:

Determine the time division duplex TDD uplink and downlink configuration;

Determining, according to the change period and the redundancy version sequence pattern, a redundancy version change pattern, where the first radio frame is a pre-agreed or configured radio frame, starting from a first subframe in the first radio frame. The first subframe is a pre-agreed or configured subframe, and the redundancy corresponding to the data transmission in the current transmission subframe is determined according to the redundancy version change pattern and the radio frame number and the subframe number corresponding to the current data transmission. version.

DRAWINGS

1 is a schematic diagram of a downlink processing flow in the prior art;

2 is a schematic diagram of a rate matching process in the prior art;

FIG. 3 is a schematic flowchart of a method for determining a redundancy version change period according to an embodiment of the present disclosure;

4 is a schematic flowchart of a channel estimation method according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for determining a redundancy version according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a system version redundancy version modification pattern according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a device for determining a redundancy version change period according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a channel estimation apparatus according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a redundancy version determining apparatus according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of another device according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another device according to an embodiment of the present disclosure.

detailed description

Referring to FIG. 3, a method for determining a redundancy version change period provided by an embodiment of the present application includes:

S101. Determine a time division duplex (TDD) uplink and downlink configuration;

S102. Determine, according to the TDD uplink and downlink configuration, a change period (or a repetition number of a single redundancy version) of the redundancy version used in the data transmission process.

Preferably, in the uplink transmission, step S102 specifically includes:

The change period of different fields may be the same or different, depending on the number of consecutive uplink subframes or the total number of subframes included in different fields;

Preferably, the change period of the redundancy version of the uplink transmission is determined according to the total number of uplink subframes included in one radio frame corresponding to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as 0, determining that the change period of the redundancy version of the uplink transmission is 6 uplink subframes, that is, changing the redundancy version every 6 consecutive uplink subframes during uplink transmission, and The change period of the redundancy version may also be a divisor of 6, or a multiple of 6, or a minimum or common divisor or a common multiple of 6 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 1, the change period of the redundancy version of the uplink transmission is determined to be 4 uplink subframes, that is, the redundancy version is changed every 4 consecutive uplink subframes in the uplink transmission, and The change period of the redundancy version may also be a divisor of 4, or a multiple of 4, or a minimum or common divisor or a common multiple of 4 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as 2/4, the change period of the redundancy version of the uplink transmission is determined to be 2 uplink subframes, that is, the redundancy version is changed every 2 consecutive uplink subframes in the uplink transmission. In addition, the change period of the redundancy version may also be a divisor of 2, or a multiple of 2, or a minimum or common divisor or a common multiple of 2 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as 3, determining that the redundancy version of the uplink transmission has a change period of 3 The uplink subframe, that is, the redundancy version is changed every three consecutive uplink subframes in the uplink transmission, and the change period of the redundancy version may also be a divisor of 3, or a multiple of 3, or 3 with an agreed value. Minimum or common divisor or common multiple; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 5, the change period of the redundancy version of the uplink transmission is determined to be one uplink subframe, that is, the redundancy version is changed once per uplink subframe in the uplink transmission, and The change period of the remaining version may also be a positive integer greater than 1, or a minimum or a common or a multiple of the agreed value, or an agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 6, the change period of the redundancy version of the uplink transmission is determined to be 5 uplink subframes, that is, the redundancy version is changed every 5 uplink subframes in the uplink transmission, and The change period of the redundancy version may also be a divisor of 5, or a multiple of 5, or a minimum or common divisor or a common multiple of 5 and the agreed value.

Preferably, the change period of the redundancy version of the uplink transmission is determined according to the number of consecutive uplink subframes included in one radio frame corresponding to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as 0/3, it is determined that the change period of the redundancy version of the uplink transmission is three uplink subframes, that is, the redundancy version is changed every three consecutive uplink subframes in the uplink transmission. In addition, the change period of the redundancy version may also be a divisor of 3, or a multiple of 3, or a minimum or common divisor or a common multiple of 3 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as 1/4, the change period of the redundancy version of the uplink transmission is determined to be two uplink subframes, that is, the redundancy version is changed every two consecutive uplink subframes in the uplink transmission. In addition, the change period of the redundancy version may also be a divisor of 2, or a multiple of 2, or a minimum or common divisor or a common multiple of 2 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured to be configured as 2/5, the change period of the redundancy version of the uplink transmission is determined to be one uplink subframe, that is, the redundancy version is changed once per uplink subframe in the uplink transmission, and The change period of the redundancy version may also be a positive integer greater than 1, or a minimum or common or multiple of the agreed value, or an agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 6, the change period of the redundancy version of the uplink transmission is determined to be 2 or 3 uplink subframes, that is, each consecutive 2 or 3 uplink subframes are changed once in the uplink transmission. The remaining version, or, the first half of the frame in one radio frame is 3, and the second half of the frame is 2. In addition, the change period of the redundancy version may also be a divisor of 3, or a multiple of 3, or a minimum of 3 and the agreed value. Value or common divisor or common multiple; or, the redundancy version of the change period can also be a divisor of 2, or a multiple of 2, or a minimum or common divisor or a common multiple of 2 and the agreed value.

Preferably, in the downlink transmission, step S102 specifically includes:

Preferably, the downlink subframe includes a TDD special subframe.

Preferably, the change period of the redundancy version of the downlink transmission is determined according to the total number of downlink subframes included in one radio frame corresponding to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as the configuration 3, the change period of the downlink version of the downlink transmission is determined to be 7 downlink subframes, that is, the redundancy version is changed every 7 consecutive downlink subframes during downlink transmission, or The change period of the redundancy version is 2 in the first half of a radio frame, 5 in the latter half, or 3 in the

subframes

5, 6, and 7 in one radio frame, and a subframe in one radio frame. 8, 9 and the next radio frame in the 0, 1 is 4, or, in a no 4 in

subframes

5, 6, 7, and 8 in the line frame, 3 in subframe 9 in one radio frame and

subframe

0, 1 in the next radio frame; in addition, the change period of the redundancy version It can also be a divisor of 7, or a multiple of 7, or a minimum or common divisor or a common multiple of 7 and the agreed value; and/or,

When the configuration of the TDD uplink and downlink is configured as 4, the change period of the redundancy version of the downlink transmission is determined to be 8 or 4 or 2 downlink subframes, that is, each consecutive 8 or 4 or 2 downlink subframes in downlink transmission. Change the redundancy version once. In addition, the change period of the redundancy version may also be a divisor of 8, or a multiple of 8, or a minimum or common divisor or a common multiple of 8 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 5, the change period of the downlink version of the downlink transmission is determined to be 9 or 3 downlink subframes, that is, the redundancy is changed every 9 or 3 downlink subframes in the downlink transmission. The version, in addition, the change period of the redundancy version may also be a divisor of 9, or a multiple of 9, or a minimum or common or common multiple of 9 and the agreed value.

Preferably, the change period of the redundancy version of the downlink transmission is determined according to the number of consecutive downlink subframes included in one radio frame corresponding to the TDD uplink and downlink configuration, or the adjacent two radios corresponding to the TDD uplink and downlink configuration. The number of consecutive downlink subframes included in the frame determines the change period of the redundancy version of the downlink transmission, and specifically includes:

When the TDD uplink and downlink configuration is configured as 0, determining that the change period of the redundancy version of the downlink transmission is two downlink subframes, that is, changing the redundancy version every two consecutive downlink subframes during downlink transmission, and The change period of the redundancy version may also be a divisor of 2, or a multiple of 2, or a minimum or common divisor or a common multiple of 2 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 1, the change period of the downlink version of the downlink transmission is determined to be three downlink subframes, that is, the redundancy version is changed every three consecutive downlink subframes during downlink transmission, and The change period of the redundancy version may also be a divisor of 3, or a multiple of 3, or a minimum or common divisor or a common multiple of 3 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 2, the change period of the redundancy version of the downlink transmission is determined to be 4 downlink subframes, that is, the redundancy version is changed every 4 consecutive downlink subframes during downlink transmission, and The change period of the redundancy version may also be a divisor of 4, or a multiple of 4, or a minimum or common divisor or a common multiple of 4 and the agreed value; and/or,

When the TDD uplink and downlink configuration is configured as the configuration 6, the change period of the downlink version of the downlink transmission is determined to be 2 or 3 downlink subframes, that is, the redundancy is changed every 2 consecutive or 3 downlink subframes in the downlink transmission. The revision period of the version, or redundancy version, is 2 in

subframes

5 and 6 of one radio frame, 3 in subframe 9 in one radio frame, and 3 in

subframes

0 and 1 in the latter radio frame. The change period of the redundancy version may also be a divisor of 3, or a multiple of 3, or a minimum or common divisor or a common multiple of 3 and the agreed value; or, the change period of the redundancy version may also be a divisor of 2, Or a multiple of 2, or a minimum or a common or multiple of the agreed value.

Preferably, the agreed value is a pre-agreed or configured constant, or a frequency hopping period and/or an uplink transmission The number of subframes used when performing multi-subframe channel estimation.

Referring to FIG. 4, a channel estimation method provided by an embodiment of the present application includes:

S201. Determine a change period of a redundancy version used in a data transmission process;

S202. Determine, according to the change period, a number of subframes that are used when performing multi-subframe channel estimation.

S203. Perform multi-subframe channel estimation by using the subframe of the subframe number.

Alternatively, for the uplink transmission (which may of course also be used for downlink transmission), determine the number of subframes to be used when multi-subframe channel estimation is required, which is the change period.

Preferably, the preset constant is, for example, A, and the A is an integer value greater than or equal to 1 of a pre-agreed or high-level signaling configuration.

Preferably:

The A=2 or 3 or 4;

Alternatively, the A is defined as the number of subframes in a radio frame used to transmit the same transport block (TB), for example, TDD uplink and downlink configuration 1, and the above row transmission is taken as an example, in subframe 3 The transmission of one TB is repeated, that is, a radio frame occupies the transmission of

subframes

3, 4, 7, 8, and 9 for a total of 5 subframes, so A=5 is defined.

Or, the A is defined as the number of consecutive subframes in the first subframe for transmitting the same TB in a radio frame, for example, TDD uplink and downlink configuration 3, and the foregoing uplink transmission is an example, in subframe 3 Start to repeat transmission of one TB, that is, the first radio frame will occupy the

subframe

3, 4 transmission, a total of 2 consecutive subframes, so define A = 2, in the subsequent radio frame will occupy the

subframe

2, 3, 4 transmission There are 3 consecutive subframes, so A=3 is defined, that is, the A values defined in different radio frames are different according to the specific circumstances.

Or, the A is defined as the number of consecutive subframes in the first subframe for transmitting the same TB in one field, for example, TDD uplink and downlink configuration 1, and the above uplink transmission is taken as an example, in subframe 3 Start repeating transmission of one TB, that is, the first half of a radio frame will occupy

subframes

3 and 4, and there are 2 consecutive subframes, so A=2 is defined, and

subframes

7, 8, and 9 are occupied in the latter half. Transmission, a total of 3 consecutive subframes, so define A = 3, that is, different A values defined in different fields according to the specific circumstances.

Based on the foregoing techniques, the embodiment of the present application may determine a redundancy version pattern according to the change period, the system radio frame number, and the redundancy version sequence pattern.

That is, in the embodiment of the present application, a specific radio frame (ie, a pre-agreed one on the network side and the UE side) may be generated according to the change period of the redundancy version, the system radio frame number, and the redundancy version sequence pattern. a radio frame as a starting point) a system-level redundancy version pattern numbered as a starting point, the redundancy version pattern providing a redundancy version of each of the radio frames starting with the specific radio frame, for The corresponding redundancy version is obtained according to the actual transmission subframe.

It should be noted that, based on the change period of the foregoing redundancy version, the radio frame number, and the redundancy version sequence pattern, a fixed redundancy version pattern is generated, and corresponding to each sub-frame in each radio frame, the pattern is working in the same All the terminals in a cell are the same. The terminal determines the corresponding redundancy version in the transmission subframe according to the redundancy version pattern according to the subframe position where the transmission is located.

Therefore, referring to FIG. 5, a method for determining a redundancy version provided by an embodiment of the present application includes:

S301. Determine a change period of a redundancy version used in a data transmission process;

S302. Determine, according to the change period and the redundancy version sequence pattern, a redundancy version change pattern by using a first subframe in the first radio frame, where the first radio frame is a pre-agreed or configured wireless. a frame, where the first subframe is a pre-agreed or configured subframe;

S303. Determine, according to the redundancy version change pattern and the radio frame number and the subframe number of the current transmission subframe, a redundancy version corresponding to the data transmission in the current transmission subframe.

For downlink transmission, the first subframe is the first downlink subframe in one radio frame, or the first downlink subframe in one subframe, or the first uplink subframe in one radio frame. The first subsequent downlink subframe, or Is the first downlink subframe in the next half of a radio frame.

For example, the first radio frame is defined as a radio frame numbered 0 in the system;

For the uplink transmission, the redundancy version sequence pattern is RV0, RV1, ..., RVN-1, and the redundancy version change period (ie, the number of repetitions of the single redundancy version) is T, and then in the uplink subframe b in the radio frame a. The redundant version of the transmitted data is the first in the redundancy version pattern

RVn, where i is determined according to the currently transmitted radio frame number a and the subframe number b, indicating that the current uplink subframe is the first uplink subframe from the first uplink subframe in the radio frame 0, That is, the number of uplink subframes from the first uplink subframe in the radio frame 0 to the current subframe; for example, the TDD uplink and downlink configuration 2, assuming T=2, and the redundancy version sequence pattern is {RV0, RV2, RV3, RV1}, starting from the first uplink subframe in the radio frame 0, and sequentially defining, the subframes 2 and 3 in the radio frame 0 correspond to RV0, and the subframes 7 and 8 in the radio frame 0 correspond to the RV2, The subframes 2 and 3 in the radio frame 1 correspond to the RV3, the subframes 7 and 8 in the radio frame 1 correspond to the RV1, and so on, at this time, the T in each radio frame and the field is the same; in particular, for the TDD In the uplink and downlink configuration 6, the T in each field may be the same as, for example, T=3, starting from the radio frame 0, and changing the RV according to T=3 in the first subframe starting from the first subframe in each radio frame, and The sequence of RV changes is performed in the order of the above-mentioned patterns, so that the RV corresponding to each uplink subframe is obtained, and the number of consecutive uplink subframes is less than 3. Only the uplink subframe in the current radio frame is not extended to the uplink subframe in the next radio frame, that is, the uplink subframe in the next radio frame still starts from the first uplink subframe in the radio frame. T=3 changes RV; or, starting from the radio frame 0, the RV is changed according to T=3 in the first sub-frame starting from the first sub-frame in each field, and the order of RV changes is sequentially performed according to the above pattern, thereby obtaining each For the RV corresponding to the uplink subframe, if the number of consecutive uplink subframes is less than 3, only the uplink subframe in the current field is taken, and the uplink subframe in the next field is not continued, that is, in the next field. The uplink subframe still starts with the first uplink subframe in the field, and changes the RV according to T=3; or, for the TDD uplink and downlink configuration 6, the T in each field may also be different, for example, the first half frame is defined. T=3 in the second half, T=2 in the second half of the frame, that is, the three uplink subframes in the first half of each radio frame correspond to the same RV, and the two uplink subframes in the second half frame correspond to the same RV. And the order in which the RV changes is performed in the order of the above-mentioned patterns, thereby obtaining each pair of uplink subframes RV; therefore, for TDD uplink and downlink configuration 6, if the redundancy version order pattern is assumed to be {RV0, RV2, RV3, RV1}, then subframes 2, 3, and 4 in radio frame 0 correspond to RV0, in radio frame 0.

Subframes

7, 8 correspond to RV2,

subframes

2, 3, and 4 in radio frame 1 correspond to RV3,

subframes

7, 8 in radio frame 1 correspond to RV1, and so on.

The downlink transmission mode is similar to the above uplink transmission mode, and the redundancy version pattern is RV0, RV1, ..., RVN-1, and the redundancy version change period (that is, the number of repetitions of the single redundancy version) is T, and then in the radio frame a. The redundancy version of the data transmitted in the downlink subframe b is the first in the redundancy version pattern.

RVn, where i is determined according to the currently transmitted radio frame number a and the subframe number b, indicating that the current downlink subframe is the first subframe in the radio frame 0 (better, the first subframe is defined as The first downlink subframe after the first uplink subframe in the radio frame 0, that is, the downlink subframe in the first uplink to downlink handover, the change period may be the same for each radio frame) The downlink subframe, that is, the number of downlink subframes from the first subframe in the radio frame 0 to the current subframe; for example, the TDD uplink and downlink configuration 2, assuming T=3, and the redundancy version sequence pattern is {RV0, RV2, RV3, RV1}, starting from subframe 4 in radio frame 0,

subframes

4, 5, and 6 in radio frame 0 correspond to RV0, subframe 9 in radio frame 0, and sub-frame in radio frame 1.

Frames

0 and 1 correspond to RV2,

subframes

4, 5, and 6 in radio frame 1 correspond to RV3, subframe 9 in radio frame 1 and

subframe

0 and 1 in radio frame 2 correspond to RV1, and so on. The T in each radio frame and the field is the same; in particular, the TDD uplink and downlink configuration 6 can define only one T value, for example, T=2, starting from the radio frame 0, at each In the radio frame, the RV is changed according to T=2 from the first downlink subframe, and the RV change sequence is performed in the above-mentioned pattern sequence, so that the RV corresponding to each downlink subframe is obtained, and the number of consecutive downlink subframes is insufficient. For example, the subframe 9 in each radio frame only takes the downlink subframe in the current radio frame, and does not continue to the downlink subframe in the next radio frame, that is, the downlink subframe in the next radio frame remains The first downlink subframe in the radio frame is the starting point and the RV is changed according to T=2, that is, for the TDD uplink and downlink configuration 6, if the redundancy version sequence pattern is assumed to be {RV0, RV2, RV3, RV1}, the radio frame is used. If the subframe 0 in the 0 is the starting point, the subframes 0 and 1 in the radio frame 0 correspond to the RV0, the subframes 5 and 6 in the radio frame 0 correspond to the RV2, and the subframe 9 in the radio frame 0 corresponds to the RV3, and the radio frame 1 The subframes 0 and 1 in the frame correspond to the RV1, the subframes 5 and 6 in the radio frame 1 correspond to the RV0, the subframe 9 in the radio frame 1 corresponds to the RV2, and so on, or the RV starting point in the latter radio frame is the former The RV corresponding to the last downlink subframe in a radio frame, that is, the subframe 0 and 1 in the radio frame 0 correspond to RV0, and the radio frame 0 The subframes 5 and 6 correspond to RV2, the subframe 9 in the radio frame 0 corresponds to the RV3, the subframes 0 and 1 in the radio frame 1 correspond to the RV3, and the subframes 5 and 6 in the radio frame 1 correspond to the RV1, and the radio frame 1 Subframe 9 corresponds to RV0, subframe 0, 1 in radio frame 2 corresponds to RV0, and so on; or, starting from radio frame 0, starting with the first downlink subframe in each field according to T =2 changes the RV, and the order of RV changes is performed in the order of the above-mentioned patterns, so that the RV corresponding to each downlink subframe is obtained. For the number of consecutive downlink subframes less than 2, for example, subframe 9 in each radio frame, only The downlink subframe in the current field does not continue to the downlink subframe in the next field, that is, the downlink subframe in the next field still starts from the first downlink subframe in the subframe, according to T=2 changes RV, and the obtained system RV pattern is the same as above; or, for TDD uplink and downlink configuration 6, multiple Ts can be defined, for example, defining subframes 5 and 6 in each radio frame corresponding to T=2, each radio frame The subframe 9 in the next radio frame and the subframe 0 and 1 in the next radio frame correspond to T=3, and the order in which the RV changes is performed in the order of the above pattern, from Obtaining the RV corresponding to each downlink subframe, that is, for the TDD uplink and downlink configuration 6, if the redundancy version sequence pattern is assumed to be {RV0, RV2, RV3, RV1}, and the subframe 5 in the radio frame 0 is used as the starting point, The subframes 5 and 6 in the radio frame 0 correspond to RV0, the subframes 9 in the radio frame 0 and the subframes 0 and 1 in the radio frame 1 correspond to the RV2, and the subframes 5 and 6 in the radio frame 1 correspond to the RV3, and the radio frame Subframe 9 in 1 and subframe 0, 1 in radio frame 2 correspond to RV1, and so on. Of course, subframe 0 in radio frame 0 can also be used as a starting point, and the first two subframes are specially processed, for example, a radio frame is defined. Subframes 0 and 1 in 0 correspond to RV0,

subframes

5 and 6 in radio frame 0 correspond to RV2, subframe 9 in radio frame 0, and

subframe

0 and 1 in radio frame 1 correspond to RV3, in radio frame 1 The

subframes

5 and 6 correspond to RV1, the subframe 9 in the radio frame 1 and the

subframes

0 and 1 in the radio frame 2 correspond to RV0, and so on.

Each of the foregoing methods provided by the embodiments of the present application can be applied to the network side and the terminal side.

An example of a specific embodiment is given below:

In the TDD uplink and downlink configuration 0, it is assumed that the redundancy version sequence pattern is RV0, RV2, RV3, and RV1. When it is determined that the change period of the redundancy version of the uplink transmission is the number of consecutive uplink subframes in one radio frame, the redundancy is determined. The remaining version change period T=3, indicating that in each radio frame, the redundancy version is changed every 3 uplink subframes, and the same redundancy version is used in 3 consecutive uplink subframes;

Further, according to the periodicity and the redundancy version sequence pattern, the system-level redundancy version modification pattern is defined starting from the radio frame 0, that is, the redundancy version corresponding to the

subframes

2, 3, and 4 in the system radio frame 0. For RV0, the redundancy version corresponding to

subframes

7, 8, and 9 is RV2. In system radio frame 1, the redundancy version corresponding to

subframes

2, 3, and 4 is RV3, and the redundancy corresponding to

subframes

7, 8, and 9. The remaining version is RV1. In system radio frame 2, the redundancy version corresponding to

subframes

2, 3, and 4 is RV0, the redundancy version corresponding to

subframes

7, 8, and 9 is RV2, and so on, as shown in Figure 6. Show

When a terminal starts to transmit a PUSCH in subframe 3 scheduled in the radio frame 1, and the number of repeated transmissions is 10, it determines a redundancy version used in each transmission subframe according to the redundancy version modification pattern described above, that is, The redundancy version sequence pattern {RV0, RV2, RV3, RV1} contains 4 redundancy versions, that is, N=4, and the change period is 3, that is, T=3. In the first transmission, the transmission corresponds to wireless. The subframe 3 in the frame 1 determines, according to the radio frame number and the subframe number, in combination with the uplink and downlink configuration, starting from the first uplink subframe in the radio frame 0 to the subframe 3 in the radio frame 1, for a total of 8 uplinks. The subframe, that is, the subframe is the 8th uplink subframe, that is, i=8, so it is determined that the redundancy version of the subframe 3 in the radio frame 1 is the redundancy version sequence pattern {RV0, RV2, RV3, RV1} First

RV3, the second transmission, the transmission corresponds to the subframe 4 in the radio frame 1, according to the radio frame number and the subframe number, combined with the uplink and downlink configuration, determine the first uplink subframe from the radio frame 0 Starting, to subframe 4 in the radio frame 1, a total of 9 uplink subframes, that is, the subframe is the ninth uplink subframe, that is, i=9, so the redundancy version of the subframe 4 in the radio frame 1 is determined. For the redundancy version sequence pattern {RV0, RV2, RV3, RV1}

RV3, in the third transmission, the transmission corresponds to the subframe 7 in the radio frame 1, and according to the radio frame number and the subframe number, combined with the uplink and downlink configuration, the first uplink subframe in the radio frame 0 is determined. Start, to the subframe 7 in the radio frame 1, a total of 10 uplink subframes, that is, the subframe is the 10th uplink subframe, that is, i=10, so the redundancy version of the subframe 7 in the radio frame 1 is determined. For the redundancy version sequence pattern {RV0, RV2, RV3, RV1}

, that is, RV4, and so on, that is, according to the relative position of each transmission subframe in the system (relative to the first uplink subframe in the first radio frame), determine the corresponding in the system RV modification pattern. RV, thereby finally determining that RV3 is used in

subframes

3 and 4 in radio frame 1, RV1 is used in

subframes

7, 8, and 9, and RV0 is used in

subframes

2, 3, and 4 in radio frame 2, subframe RV2 is used in 7, 8;

Further, since the terminal has two consecutive subframe transmissions in the first half of the radio frame 1, that is, A=2, the number of subframes in which the terminal performs multi-subframe channel estimation in the first half of the radio frame 1=min(T, A)=min(3,2)=2, that is, multi-subframe channel estimation is performed using

only subframes

3 and 4, and the terminal has three consecutive sub-frames in the second half of the radio frame 1 and the first half of the radio frame 2 Frame transmission, that is, A=3, therefore, the number of subframes in which the terminal performs multi-subframe channel estimation in the second half of the radio frame 1 and the first half of the radio frame 2 = T or = min(T, A) = min (3,3)=3, that is, using 3 subframes for channel estimation, since the terminal has 2 consecutive subframe transmissions in the second half of the radio frame 2, that is, A=2, the terminal is in the second half of the radio frame 2. The number of subframes in which multi-subframe channel estimation is performed in the frame = min(T, A) = min(3, 2) = 2, that is, multi-subframe channel estimation is performed using

only subframes

7, 8.

The embodiment of the downlink transmission is similar to the uplink transmission described above, and details are not described herein again.

It should be noted that, for TDD, the foregoing downlink subframe includes a normal downlink subframe and a special subframe.

Referring to FIG. 7, a device for determining a redundancy version change period according to an embodiment of the present application includes:

The first unit 11 is configured to determine a time division duplex TDD uplink and downlink configuration;

The second unit 12 is configured to determine, according to the TDD uplink and downlink configuration, a change period of the redundancy version used in the data transmission process.

Preferably, the second unit is specifically configured to:

subframes

5, 6, and 7 in the frame, 4 in the

subframes

frames

5, 6, 7, 8 is 3 in subframe 9 in one radio frame and

subframe

0, 1 in the next radio frame; and/or,

Preferably, the second unit is specifically configured to:

subframes

5 and 6 of one radio frame, 2, in one radio frame. Subframe 9 and

subframes

0 and 1 in the next radio frame are 3.

Referring to FIG. 8, a channel estimation apparatus provided by an embodiment of the present application includes:

a change period determining unit 21, configured to determine a change period of a redundancy version adopted in the data transmission process;

The subframe number determining unit 22 is configured to determine, according to the change period, a number of subframes that are used when performing multi-subframe channel estimation;

The channel estimation unit 23 is configured to perform multi-subframe channel estimation by using the subframe of the subframe number.

Preferably, the preset constant is 2 or 3 or 4;

Referring to FIG. 9, a redundancy version determining apparatus provided by an embodiment of the present application includes:

a change period determining unit 31, configured to determine a change period of a redundancy version adopted in the data transmission process;

The redundancy version determining unit 32 is configured to determine, according to the change period and the redundancy version sequence pattern, a redundancy version change pattern by using a first subframe in the first radio frame, where the first radio frame For a pre-agreed or configured radio frame, the first subframe is a pre-agreed or configured subframe, and the pattern is changed according to the redundancy version and current The radio frame number and the subframe number corresponding to the data transmission determine the redundancy version corresponding to the data transmission in the current transmission subframe.

It should be noted that each of the foregoing units may be implemented by a physical device such as a processor, and each of the foregoing devices may be a network device on the network side, such as a base station, or a terminal device, such as a UE.

As shown in FIG. 10, an apparatus according to an embodiment of the present invention includes a processor 1001 and a memory 1002, wherein a preset program is stored in the memory 1002, and the processor 1001 reads a program in the memory 1002 according to the program. Perform the following process:

Determine the time division duplex TDD uplink and downlink configuration;

Specifically, the specific implementation manner of the method for determining the change period of the redundancy version used in the data transmission process according to the TDD uplink and downlink configuration may be described in the method embodiment, and details are not described herein again.

Referring to FIG. 11, an apparatus according to an embodiment of the present invention includes a processor 1101 and a memory 1102, wherein a preset program is stored in the memory 1102, and the processor 1101 reads a program in the memory 1102 according to the process. The following process is performed:

For a specific implementation manner of the multi-subframe channel estimation by the processor, refer to the description of the method embodiment, and details are not described herein again.

Referring to FIG. 12, an apparatus according to an embodiment of the present invention includes a processor 1201 and a memory 1202, wherein a preset program is stored in the memory 1202, and the processor 1201 reads a program in the memory 1202 according to the program. Perform the following process:

For a specific implementation manner of the processor to determine the redundancy version corresponding to the data transmission in the current transmission subframe, refer to the description of the method embodiment, and details are not described herein again.

10 to 12, the processor and the memory are connected by a bus, and the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor and memory represented by the memory. Various circuits are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.

In summary, in the technical solution provided by the embodiment of the present application, the change period of the redundant version of the repeated transmission is determined according to the TDD uplink and downlink configuration, to support multi-subframe channel estimation during repeated transmission, and the transmission performance is improved.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. A processor that can provide these computer program instructions to a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device To generate a machine such that instructions executed by a processor of a computer or other programmable data processing device generate functions for implementing a process in a flow or a flow and/or a block diagram in a block or blocks. s installation.

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.

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

Claims

A method for determining a redundancy version change period, the method comprising:

Determine the time division duplex TDD uplink and downlink configuration;

According to the TDD uplink and downlink configuration, a change period of the redundancy version adopted in the data transmission process is determined.
The method according to claim 1, wherein the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

Determining, by the change period of the redundancy version used by the uplink transmission, the total number of uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the uplink transmission, which is a divisor or a multiple of the total number of uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the uplink transmission, where the number of consecutive uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the uplink transmission, which is a divisor or multiple of the number of consecutive uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, and the number of consecutive uplink subframes or the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, which is a divisor or a multiple of the number of consecutive uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, which is a divisor or a multiple of the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the uplink transmission, where the total number of uplink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used in the uplink transmission, where the number of consecutive uplink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used for the uplink transmission in one field, and the minimum or common number of consecutive uplink subframes and the agreed value included in the field corresponding to the TDD uplink and downlink configuration Or a common multiple;

Or determining a change period of the redundancy version used for the uplink transmission in one field, the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration, and the minimum or common divisor of the agreed value or common multiple.
The method according to claim 1, wherein the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

Determining, by the change period of the redundancy version used by the downlink transmission, the total number of downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version adopted by the downlink transmission, which is corresponding to the TDD uplink and downlink configuration. a divisor or multiple of the total number of downlink subframes included in a radio frame or field;

Or determining a change period of the redundancy version used in the downlink transmission, where the number of consecutive downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, which is a divisor or a multiple of the number of consecutive downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, and the number of consecutive downlink subframes or the number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, which is a divisor or multiple of the number of consecutive downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, which is a divisor or multiple of the total number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining, according to the change period of the redundancy version used by the downlink transmission, the number of consecutive downlink subframes included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the downlink transmission, which is a divisor or a multiple of the number of consecutive downlink subframes included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, where the total number of downlink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used in the downlink transmission, where the number of consecutive downlink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used for the downlink transmission in one field, and the total number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration and the minimum or common divisor of the agreed value or common multiple;

Or determining a change period of the redundancy version used for the downlink transmission in one field, the minimum number of consecutive downlink subframes included in the half frame corresponding to the TDD uplink and downlink configuration, and a minimum or common divisor of the agreed value Or a common multiple;

Or determining a change period of the redundancy version used in the downlink transmission, which is a minimum value or a common number or a common multiple of the consecutive downlink subframes and the agreed value included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration.
The method according to claim 1, wherein the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as 0, it is determined that the change period of the redundancy version adopted by the uplink transmission is 6; and/or,

When the TDD uplink and downlink configuration is configured as 1, it is determined that the change period of the redundancy version adopted by the uplink transmission is 4; and/or,

When the TDD uplink and downlink configuration is configured as 2 or 4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 3, determining that the redundancy version of the uplink transmission has a change period of 3; and/or,

When the TDD uplink and downlink configuration is configured as 5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version adopted for the uplink transmission is determined to be 5.
The method according to claim 1, wherein the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as 0 or 3, it is determined that the change period of the redundancy version adopted by the uplink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 1 or 4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 2 or 5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version used for the uplink transmission is determined to be 2 or 3, or the first half frame and the second half frame are 2 in one radio frame.
The method according to claim 1, wherein the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as 3, it is determined that the change period of the redundancy version used in the downlink transmission is 7, or the first half frame in one radio frame is 2, the second half frame is 5, or, in a wireless 3 in the subframes 5, 6, and 7 in the frame, 4 in the subframes 8, 9 in one radio frame, and 4, 1 in the next radio frame, or a sub-frame in a radio frame 4 in frames 5, 6, 7, 8 is 3 in subframe 9 in one radio frame and subframe 0, 1 in the next radio frame; and/or,

When the TDD uplink and downlink configuration is configured as 4, the change period of the redundancy version used for determining the downlink transmission is 8 or 4 or 2; and/or,

When the TDD uplink and downlink configuration is configured as 5, it is determined that the change period of the redundancy version adopted by the downlink transmission is 9 or 3.
The method according to claim 1, wherein the change period of the redundancy version adopted in the data transmission process is determined according to the TDD uplink and downlink configuration, and specifically includes:

When the TDD uplink and downlink configuration is configured as 0, it is determined that the change period of the redundancy version adopted by the downlink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 1, the change period of the redundancy version used for determining the downlink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 2, the change period of the redundancy version used for determining the downlink transmission is 4 Or 2; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version used for determining the downlink transmission is 2 or 3, or 2, in the subframes 5 and 6 of one radio frame, 2, in one radio frame. Subframe 9 and subframes 0 and 1 in the next radio frame are 3.
The method according to claim 2, 4 or 5, wherein the agreed value is a pre-agreed or configured constant, or is used for multi-subframe channel estimation for a frequency hopping period and/or an uplink of an uplink transmission. The number of subframes.
The method according to claim 3, 6, or 7, wherein the agreed value is a pre-agreed or configured constant, or is used for multi-subframe channel estimation for a hopping period of downlink transmission and/or downlink. The number of subframes.
The method according to claim 2 or 3, wherein the common divisor is the greatest common divisor and the common multiple is the least common multiple.
A channel estimation method, comprising:

Determining the change period of the redundancy version used in the data transmission process;

Determining, according to the change period, a number of subframes to be used when performing multi-subframe channel estimation;

Multi-subframe channel estimation is performed using the subframes of the number of subframes.
The method according to claim 11, wherein determining the number of subframes to be used for multi-subframe channel estimation according to the change period includes:

Determining a number of subframes to be used when performing multi-subframe channel estimation, which is a minimum value of the change period and a preset constant;

Or, determining the number of subframes to be used when performing multi-subframe channel estimation is the change period.
The method according to claim 12, wherein said preset constant is 2 or 3 or 4;

Or the preset constant is a number of subframes in a radio frame used for transmitting the same transport block TB;

Or the preset constant is a number of consecutive subframes starting from a first subframe for transmitting the same TB in one radio frame;

Alternatively, the preset constant is the number of consecutive subframes starting from the first subframe for transmitting the same TB in one field.
The method according to any one of claims 11 to 13, wherein the determining the period of change of the redundancy version used in the data transmission process comprises: using the rights according to any one of claims 1 to 10. The method determines the change period of the redundancy version used in the data transmission process.
A redundancy version determining method, comprising:

Determining the change period of the redundancy version used in the data transmission process;

Determining, according to the change period and the redundancy version sequence pattern, a redundancy version change pattern, where the first radio frame is a pre-agreed or configured radio frame, starting from a first subframe in the first radio frame. The first subframe is a pre-agreed or configured subframe;

And determining, according to the redundancy version change pattern and the radio frame number and the subframe number of the current transmission subframe, a redundancy version corresponding to the data transmission in the current transmission subframe.
The method according to claim 15, wherein the redundancy version change pattern is determined by using the first subframe in the first radio frame as a starting point according to the change period and the redundancy version sequence pattern, and specifically includes:

Setting the change period to T, starting from the first subframe in the first radio frame, changing the redundancy version every T first subframes, and changing the redundancy version according to the redundancy version sequence pattern;

Or, the change period is T, starting with the first subframe in the first radio frame, starting with the first first-type subframe in each radio frame, and changing every T first-type subframes One redundancy version, the redundancy version is changed according to the redundancy version sequence pattern;

Or, the change period is T, starting with the first subframe in the first radio frame, starting with the first first type subframe in each field, and changing every T first type subframe One redundancy version, the redundancy version is changed according to the redundancy version sequence pattern;

For the uplink transmission, the first type of subframe is an uplink subframe, and for downlink transmission, the first type of subframe is a downlink subframe.
The method according to claim 15 or 16, wherein the first radio frame is a radio frame with a radio frame number of 0; and/or,

For uplink transmission, the first subframe is the first uplink subframe in one radio frame, or the first uplink subframe in one subframe; and/or,

For downlink transmission, the first subframe is the first downlink subframe in one radio frame, or the first downlink subframe in one subframe, or the first uplink subframe in one radio frame. The first downlink subframe after that, or the first downlink subframe in the latter half of a radio frame.
The method according to claim 15, wherein the determining the change period of the redundancy version used in the data transmission process comprises: determining the data transmission process by using the method according to any one of claims 1 to 10. The change period of the redundancy version used in the process.
A device for determining a redundancy version change period, comprising:

The first unit is configured to determine a time division duplex TDD uplink and downlink configuration;

And a second unit, configured to determine, according to the TDD uplink and downlink configuration, a change period of the redundancy version used in the data transmission process.
The device according to claim 19, wherein the second unit is specifically configured to:

Determining, by the change period of the redundancy version used by the uplink transmission, the total number of uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the uplink transmission, which is a divisor or a multiple of the total number of uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the uplink transmission, where the number of consecutive uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the uplink transmission, which is a divisor or multiple of the number of consecutive uplink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, and the number of consecutive uplink subframes or the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, which is a divisor or a multiple of the number of consecutive uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for the uplink transmission in one field, which is a divisor or a multiple of the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the uplink transmission, where the total number of uplink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used in the uplink transmission, where the number of consecutive uplink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used for the uplink transmission in one field, and the minimum or common number of consecutive uplink subframes and the agreed value included in the field corresponding to the TDD uplink and downlink configuration Or a common multiple;

Or determining a change period of the redundancy version used for the uplink transmission in one field, the total number of uplink subframes included in the field corresponding to the TDD uplink and downlink configuration, and the minimum or common divisor of the agreed value or common multiple.
The device according to claim 19, wherein the second unit is specifically configured to:

Determining, by the change period of the redundancy version used by the downlink transmission, the total number of downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the downlink transmission, which is a divisor or a multiple of the total number of downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, where the number of consecutive downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, which is a divisor or a multiple of the number of consecutive downlink subframes included in one radio frame or a field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, and the number of consecutive downlink subframes or the number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, which is a divisor or multiple of the number of consecutive downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used for downlink transmission in one field, which is a divisor or multiple of the total number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration;

Or determining, according to the change period of the redundancy version used by the downlink transmission, the number of consecutive downlink subframes included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used by the downlink transmission, which is a divisor or a multiple of the number of consecutive downlink subframes included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration;

Or determining a change period of the redundancy version used in the downlink transmission, where the total number of downlink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used in the downlink transmission, where the number of consecutive downlink subframes included in a radio frame or a field corresponding to the TDD uplink and downlink configuration is a minimum value or a common number or a common multiple of the agreed value;

Or determining a change period of the redundancy version used for the downlink transmission in one field, and the total number of downlink subframes included in the field corresponding to the TDD uplink and downlink configuration and the minimum or common divisor of the agreed value or common multiple;

Or determining a change period of the redundancy version used for the downlink transmission in one field, the minimum number of consecutive downlink subframes included in the half frame corresponding to the TDD uplink and downlink configuration, and a minimum or common divisor of the agreed value Or a common multiple;

Or determining a change period of the redundancy version used in the downlink transmission, which is a minimum value or a common number or a common multiple of the consecutive downlink subframes and the agreed value included in the adjacent two radio frames corresponding to the TDD uplink and downlink configuration.
The device according to claim 19, wherein the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 0, it is determined that the change period of the redundancy version adopted by the uplink transmission is 6; and/or,

When the TDD uplink and downlink configuration is configured as 1, it is determined that the change period of the redundancy version adopted by the uplink transmission is 4; and/or,

When the TDD uplink and downlink configuration is configured as 2/4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 3, determining that the redundancy version of the uplink transmission has a change period of 3; and/or,

When the TDD uplink and downlink configuration is configured as 5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version adopted for the uplink transmission is determined to be 5.
The device according to claim 19, wherein the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 0/3, it is determined that the change period of the redundancy version adopted by the uplink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 1/4, it is determined that the change period of the redundancy version adopted by the uplink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured to be 2/5, it is determined that the change period of the redundancy version adopted by the uplink transmission is 1; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version used for the uplink transmission is determined to be 2 or 3, or the first half frame and the second half frame are 2 in one radio frame.
The device according to claim 19, wherein the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 3, it is determined that the change period of the redundancy version used in the downlink transmission is 7, or the first half frame in one radio frame is 2, the second half frame is 5, or, in a wireless 3 in the subframes 5, 6, and 7 in the frame, 4 in the subframes 8, 9 in one radio frame, and 4, 1 in the next radio frame, or a sub-frame in a radio frame 4 in frames 5, 6, 7, 8 is 3 in subframe 9 in one radio frame and subframe 0, 1 in the next radio frame; and/or,

When the TDD uplink and downlink configuration is configured as 4, the change period of the redundancy version used for determining the downlink transmission is 8 or 4 or 2; and/or,

When the TDD uplink and downlink configuration is configured as 5, it is determined that the change period of the redundancy version adopted by the downlink transmission is 9 or 3.
The device according to claim 19, wherein the second unit is specifically configured to:

When the TDD uplink and downlink configuration is configured as 0, it is determined that the change period of the redundancy version adopted by the downlink transmission is 2; and/or,

When the TDD uplink and downlink configuration is configured as 1, the change period of the redundancy version used for determining the downlink transmission is 3; and/or,

When the TDD uplink and downlink configuration is configured as 2, it is determined that the change period of the redundancy version adopted by the downlink transmission is 4 or 2; and/or,

When the TDD uplink and downlink configuration is configured as 6, the change period of the redundancy version used for determining the downlink transmission is 2 or 3, or 2, in the subframes 5 and 6 of one radio frame, 2, in one radio frame. Subframe 9 and subframes 0 and 1 in the next radio frame are 3.
The apparatus according to claim 20, 22 or 23, wherein the agreed value is a pre-agreed or configured constant, or is used for multi-subframe channel estimation for a frequency hopping period of uplink transmission and/or uplink. The number of subframes.
The apparatus according to claim 21, 24 or 25, wherein the agreed value is a pre-agreed or configured constant, or is used for a hopping period of a downlink transmission and/or a multi-subframe channel estimation for a downlink. The number of subframes.
The apparatus according to claim 20 or 21, wherein said common divisor is the greatest common divisor and said common multiple is the least common multiple.
A channel estimation apparatus, comprising:

a change period determining unit, configured to determine a change period of a redundancy version adopted in the data transmission process;

a subframe number determining unit, configured to determine, according to the change period, a sub-subject used when performing multi-subframe channel estimation Number of frames;

And a channel estimation unit, configured to perform multi-subframe channel estimation by using the subframe of the subframe number.
The apparatus according to claim 29, wherein the subframe number determining unit is specifically configured to: determine a number of subframes to be used when performing multi-subframe channel estimation, where the change period and the preset constant are Minimum value

Or, determining the number of subframes to be used when performing multi-subframe channel estimation is the change period.
The apparatus according to claim 30, wherein said preset constant is 2 or 3 or 4;

Or the preset constant is a number of subframes in a radio frame used for transmitting the same transport block TB;

Or the preset constant is a number of consecutive subframes starting from a first subframe for transmitting the same TB in one radio frame;

Alternatively, the preset constant is the number of consecutive subframes starting from the first subframe for transmitting the same TB in one field.
The apparatus according to any one of claims 29 to 31, wherein said change period determining unit is the apparatus according to any one of claims 19 to 28.
A redundancy version determining device, comprising:

a change period determining unit, configured to determine a change period of a redundancy version adopted in the data transmission process;

a redundancy version determining unit, configured to determine, according to the change period and the redundancy version order pattern, a redundancy version change pattern by using a first subframe in the first radio frame as a starting point, where the first radio frame is a pre-agreed or configured radio frame, the first sub-frame is a pre-agreed or configured sub-frame, and the current transmission sub-frame is determined according to the redundancy version change pattern and the radio frame number and the sub-frame number corresponding to the current data transmission. The redundancy version corresponding to the data transmission.
The apparatus according to claim 33, wherein the redundancy version determining unit determines the redundancy version based on the change period and the redundancy version order pattern starting from the first subframe in the first radio frame Change the pattern, including:

Setting the change period to T, starting from the first subframe in the first radio frame, changing the redundancy version every T first subframes, and changing the redundancy version according to the redundancy version sequence pattern;

Or, the change period is T, starting with the first subframe in the first radio frame, starting with the first first-type subframe in each radio frame, and changing every T first-type subframes One redundancy version, the redundancy version is changed according to the redundancy version sequence pattern;

Or, the change period is T, starting with the first subframe in the first radio frame, starting with the first first type subframe in each field, and changing every T first type subframe One redundancy version, the redundancy version is changed according to the redundancy version sequence pattern;

For the uplink transmission, the first type of subframe is an uplink subframe, and for downlink transmission, the first type of subframe is a downlink subframe.
The apparatus according to claim 33 or 34, wherein said first radio frame is a radio frame with a radio frame number of 0; and/or

For uplink transmission, the first subframe is the first uplink subframe in one radio frame, or the first uplink subframe in one subframe; and/or,

For downlink transmission, the first subframe is the first downlink subframe in one radio frame, or the first downlink subframe in one subframe, or the first uplink subframe in one radio frame. The first downlink subframe after that, or the first downlink subframe in the latter half of a radio frame.
The apparatus according to claim 33, wherein said change period determining unit is the apparatus according to any one of claims 19 to 28.
An apparatus, comprising: a processor and a memory, wherein the memory stores a preset program, the processor reads the program in the memory, and executes the following process according to the program:

Determine the time division duplex TDD uplink and downlink configuration;

According to the TDD uplink and downlink configuration, a change period of the redundancy version adopted in the data transmission process is determined.

Specifically, the specific implementation manner of the method for determining the change period of the redundancy version used in the data transmission process according to the TDD uplink and downlink configuration may be described in the method embodiment, and details are not described herein again.
An apparatus, comprising: a processor and a memory, wherein the memory stores a preset program, the processor reads the program in the memory, and executes the following process according to the program:

Determining the change period of the redundancy version used in the data transmission process;

Determining, according to the change period, a number of subframes to be used when performing multi-subframe channel estimation;

Multi-subframe channel estimation is performed using the subframes of the number of subframes.
An apparatus, comprising: a processor and a memory, wherein the memory stores a preset program, the processor reads the program in the memory, and executes the following process according to the program:

Determining the change period of the redundancy version used in the data transmission process;

Determining, according to the change period and the redundancy version sequence pattern, a redundancy version change pattern, where the first radio frame is a pre-agreed or configured radio frame, starting from a first subframe in the first radio frame. The first subframe is a pre-agreed or configured subframe, and the redundancy corresponding to the data transmission in the current transmission subframe is determined according to the redundancy version change pattern and the radio frame number and the subframe number corresponding to the current data transmission. version.