WO2018202029A1

WO2018202029A1 - Method and apparatus for sending code block group

Info

Publication number: WO2018202029A1
Application number: PCT/CN2018/085290
Authority: WO
Inventors: 官磊
Original assignee: 华为技术有限公司
Priority date: 2017-05-04
Filing date: 2018-05-02
Publication date: 2018-11-08
Also published as: CN108809533A; CN108809533B

Abstract

The present application provides a method for sending a code block group (CBG), the method comprising: a first device sending at least two CBGs to a second device; the first device detecting first feedback information, the first feedback information being used for feeding a decoding status of a first CBG back, the first CBG belonging to the at least two CBGs; the first device sending first indication information and a retransmitted CBG to the second device, the retransmitted CBG belonging to the at least two CBGs, the first indication information being used for indicating the receiving status of the first feedback information. The method for sending a CBG provided in the present application enables a device for sending a CBG to successfully retransmit a CBG in cases where the feedback information is undetected or unsuccessfully decoded, improving the transmission efficiency of a communication system.

Description

Method and apparatus for transmitting a coded block group

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. in.

Technical field

The present application relates to the field of communications, and in particular, to a method and apparatus for transmitting a code group, and a method and apparatus for receiving a code block group.

Background technique

In a wireless communication system, in order to reduce the complexity of the coding and decoding, a transport block (TB) is divided into a plurality of code blocks (CBs), and one or more CBs form a code block group (code). The block group (CBG), after receiving the CBG sent by the sending end, the receiving end decodes the CBG, and feeds back the CBG decoding status to the sending end by using the feedback information, so that the sending end determines whether to retransmit the CBG according to the feedback information.

When the sender does not successfully decode the feedback information, for example, the sender receives the feedback but does not successfully decode the feedback information, or the receiver sends the feedback but the sender does not receive the feedback, which will cause the CBG to retransmit. .

Summary of the invention

In view of this, the present application provides a method and apparatus for transmitting a CBG, and a method and apparatus for receiving a CBG, which can solve the above problem of CBG retransmission failure.

In one aspect, a method for transmitting a CBG is provided, including: a first device sending at least two CBGs to a second device; the first device detecting first feedback information, where the first feedback information is used to feed back a first CBG Decoding state, the first CBG belongs to the at least two CBGs; the first device sends first indication information and a retransmission CBG to the second device, where the retransmission CBG belongs to the at least two The CBG, the first indication information is used to indicate a receiving state of the first feedback information.

The method for transmitting a CBG provided by the present application enables the device that sends the CBG to successfully retransmit the CBG in the case of missed detection or unsuccessfully decoding the feedback information, thereby improving the transmission efficiency of the communication system.

Optionally, the method further includes: determining, by the first device, the retransmission CBG according to the reference feedback information, where the reference feedback information is successfully decoded in the first feedback information that is detected within a preset time period. First feedback information.

Optionally, the reference feedback information is specifically: the first feedback information that is detected by the detection time unit from the retransmission time unit in the first feedback information, where the detection time unit is the first device. And detecting, by the time unit, the time unit of the first feedback information, where the retransmission time unit is the time unit that sends the retransmission CBG to the first device.

Thus, the CBG that currently needs to be retransmitted is determined, for example, those CBGs whose decoding status is undecoded in the reference feedback information are determined to be the current retransmission CBG.

Optionally, the first indication information is specifically used to indicate that the detection time unit is received from the first feedback information that is closest to the retransmission time unit, where the detection time unit detects the first device a time unit of the first feedback information, where the retransmission time unit is a time unit for transmitting, by the first device, the retransmission CBG.

Therefore, the device receiving the CBG can directly determine the receiving state of the last sent first feedback information according to the first indication information without preempting the scheduling information.

Optionally, the first indication information is specifically used to indicate the number of the first feedback information that is successfully decoded in the detected first feedback information.

Even if the second device misses the scheduling information sent by the first device for the nth time, if the second device successfully decodes the scheduling information of the n+1th transmission of the first device, the foregoing embodiment can enable the second device to successfully receive the second device. The first device retransmits the CBG at the n+1th transmission.

Optionally, the first indication information is used to indicate at least two states, where the at least two states correspond to the first one of the detected first feedback information that is adjacent to the at least two detection time units and successfully decoded. The feedback information unit is a time unit in which the first device detects the first feedback information.

Even if the second device misses the scheduling information sent by the first device one time, the above embodiment can enable the second device to successfully receive the retransmission CBG sent by the first device.

In another aspect, a method for receiving a CBG is provided, including: a second device receiving at least two coded block groups CBG from a first device; the second device transmitting first feedback information to the first device, The first feedback information is used to feed back a decoding status of the first CBG, where the first CBG belongs to the at least two CBGs; the second device receives the first indication information and the retransmission CBG from the first device, where The retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate a receiving state of the first feedback information.

According to the method for receiving a CBG provided by the present application, the device receiving the CBG can successfully receive the retransmission CBG in the case that the device transmitting the CBG misses or fails to decode the feedback information, thereby improving the transmission efficiency of the communication system.

Optionally, the method further includes: determining, by the second device, reference feedback information according to the first indication information, where the reference feedback information is the first that is successfully decoded by the first device in a preset time period. Feedback information: the second device determines the retransmission CBG according to the reference feedback information.

Optionally, the reference feedback information is specifically: the first feedback information that is sent by the sending time unit to the retransmission time unit, where the sending time unit sends the first feedback information to the second device. a time unit, where the retransmission time unit is a time unit in which the second device receives the retransmission CBG.

Therefore, after determining the reference feedback information, the second device determines, according to the reference feedback information, which CBGs the retransmission CBG is currently received.

Optionally, the first indication information is specifically used to indicate, by the sending time unit, a receiving state of the first feedback information that is closest to a retransmission time unit, where the sending time unit sends the a time unit of the first feedback information, where the retransmission time unit is a time unit in which the second device receives the retransmission CBG.

Therefore, on the premise that the second device does not miss the scheduling information sent by the first device, the second device may directly determine the receiving state of the first feedback information that is sent last time according to the first indication information.

Optionally, the first indication information is specifically used to indicate the quantity of the first feedback information that is successfully decoded by the first device.

Optionally, the first indication information is used to indicate at least two states, where the at least two states correspond to the first feedback information that the at least two sending time units are adjacent to each other and the first device successfully decodes, The sending time unit is a time unit for sending the first feedback information by the second device.

In this way, the foregoing embodiment enables the second device to successfully receive the retransmission CBG sent by the first device even if the second device misses the scheduling information that is sent by the first device.

In another aspect, the present application provides a device for transmitting a CBG, where the device can implement the functions performed by the first device in the method related to the foregoing aspects, and the functions can be implemented by using hardware or by executing corresponding software through hardware. . The hardware or software includes one or more corresponding units or modules of the above functions.

In one possible design, the apparatus includes a processor and a transceiver configured to support the apparatus to perform the corresponding functions of the above methods. The transceiver is used to support communication between the device and other network elements. The apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.

In a further aspect, the application provides a device for receiving a CBG, which can implement the functions performed by the second device in the method related to the foregoing aspects, and the functions can be implemented by using hardware or by executing corresponding software through hardware. . The hardware or software includes one or more corresponding units or modules of the above functions.

In still another aspect, a network system is provided, the network system comprising the CBG transmitting device and the CBG receiving device described in the above aspects.

In still another aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is run by a communication unit, a processing unit or a transceiver of a terminal device, or a processor, such that The device performs the methods in the above implementations.

In still another aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is run by a communication unit, a processing unit or a transceiver of a terminal device, or a processor, such that the second The device performs the methods in the above implementations.

In still another aspect, the present application provides a computer storage medium for storing computer software instructions for use in the first device described above, including a program designed to perform the above aspects.

In still another aspect, the present application provides a computer storage medium for storing computer software instructions for use in the second device described above, including a program designed to perform the above aspects.

DRAWINGS

1 is a schematic architectural diagram of a communication system to which the present application is applied;

2 is a schematic diagram of a method for dividing a CBG provided by the present application;

3 is a schematic flowchart of a method for transmitting a CBG provided by the present application;

4 is a schematic flowchart of another method for transmitting a CBG provided by the present application;

FIG. 5 is a schematic flowchart of a method for receiving a CBG provided by the present application; FIG.

6 is a schematic structural diagram of a possible first device provided by the present application;

7 is a schematic structural diagram of another possible first device provided by the present application;

8 is a schematic structural diagram of a possible second device provided by the present application;

FIG. 9 is a schematic structural diagram of another possible second device provided by the present application.

detailed description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

FIG. 1 illustrates a communication system 100 to which the present application is applied. The communication system 100 includes an access network device 110 and a terminal device 120. The access network device 110 communicates with the terminal device 120 over a wireless network. When the terminal device 120 transmits data, the wireless communication module can encode the information for transmission. Specifically, the wireless communication module can acquire a certain number of data bits to be transmitted to the access network device 110 through a channel, such as data bits generated by the processing module, received from other devices, or saved in the storage module. . These data bits may be included in one or more transport blocks (which may also be referred to as information blocks or data blocks) that may be segmented to produce a plurality of coded blocks.

In this application, a terminal device may be referred to as an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless device. Communication device, user agent or user device. The access terminal can be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to the wireless modem, an in-vehicle device, a wearable device, and a user device in a 5G communication system.

The access network device may be a base transceiver station (BTS) in a code division multiple access (CDMA) system, or may be a wideband code division multiple access (WCDMA) system. The base station (node B, NB) may also be an evolved base station (eNB) in a long term evolution (LTE) system, or may be a base station (gNB) in a 5G communication system. For example, the access network device may also be a relay station, an access point, an in-vehicle device, a wearable device, and other types of devices.

The communication system to which the present application is applied is merely an example. The communication system to which the present application is applied is not limited thereto. For example, the number of access network devices and terminal devices included in the communication system may be other numbers.

In order to facilitate the understanding of the present application, before introducing the method for transmitting CBG provided by the present application, the concept involved in the present application will be briefly introduced.

In the present application, one TB may be divided into one or more CBGs, and each CBG includes at least one CB. For example, the number of CBGs into which a TB is divided may be determined according to the number of bits of the TB, or may be determined according to the time domain and/or frequency domain resources occupied by the TB, and may also be through higher layer signaling. Direct configuration.

The CB in the TB may be mapped to the time-frequency resource according to a predetermined mapping rule. For example, the predetermined mapping rule is: mapping according to the CB index and sequentially in the order of the time domain after the first frequency domain; or the predetermined mapping rule is: The frequency domain to be mapped is divided into a plurality of sub-frequency domains, and then mapped in each sub-frequency domain.

Based on the foregoing mapping rule, a division manner in which a TB is divided into CBGs may be divided according to time-frequency resources mapped by the TB, such as a time dimension, a frequency dimension, or a time-frequency two-dimensional division manner. The same CB may exist in multiple CBGs, or the same CB may not exist. Whether the same CB exists in multiple CBGs divided depends on the final resource mapping result described above;

The CB in the TB may also be divided into multiple CBGs by other rules (such as the division manner irrespective of the time-frequency resources to which the TB is mapped and related to the number of bits of the transport block) or signaling to divide the CB into multiple CBGs. The same CB does not generally exist in a plurality of CBGs divided into.

This application does not limit the manner in which the TB is divided. Two examples are given below. The two examples should not be construed as limiting the manner in which the TB of the present application is divided.

TB division method 1:

The first TB includes four CBs, which are respectively CB1, CB2, CB3, and CB4. The first TB may be divided into two CBGs, that is, CBG1 and CBG2 according to the foregoing other rules or high-level signaling indications, where CBG1 includes CB1. And CB2, CBG2 includes CB3 and CB4;

The first TB includes eight CBs, which are CB1, CB2, CB3, CB4, CB5, CB6, CB7, and CB8, and may divide the first TB into two CBGs according to the foregoing mapping rule or high-level signaling indication, that is, CBG1 and CBG2, wherein CBG1 comprises CB1, CB2, CB3 and CB4, and CBG2 comprises CB5, CB6, CB7 and CB8;

The first TB includes eight CBs, which are CB1, CB2, CB3, CB4, CB5, CB6, CB7, and CB8, and can be divided into four CBGs according to the foregoing mapping rule or high-level signaling indication, that is, CBG1. CBG2, CBG3 and CBG4, wherein CBG1 comprises CB1 and CB2, CBG2 comprises CB3 and CB4, CBG3 comprises CB5 and CB6, and CBG4 comprises CB7 and CB8.

TB division 2:

FIG. 2 is a schematic diagram showing a manner of dividing a TB provided by the present application. As shown in FIG. 2, the first TB is composed of 42 CBs, and is mapped to 12 time domain symbols according to the order of the time domain of the pre-frequency domain, and the first TB is divided into 12 CBGs according to the dimension of the time domain symbol. Since the frequency domain resources corresponding to a single time domain symbol are limited, some CBs are not all mapped to the same time domain symbol. For example, CBG1 includes CB1 to CB4, CBG2 includes CB4 to CB7, and CB4 is a common CB of CBG1 and CBG2.

When the TB transmitted in the communication system is divided into multiple CBGs, the receiving end may send feedback information to the sending end according to the decoding status of each CBG. When a small amount of CBG decoding fails, the transmitting end only needs to retransmit the CBG that fails to be decoded. Retransmit the entire TB, improving resource utilization and data transfer efficiency.

Hereinafter, a method of transmitting a CBG provided by the present application will be described in detail.

FIG. 3 is a schematic flowchart of a method for transmitting a CBG provided by the present application. Method 300 includes:

S310. The first device sends at least two CBGs to the second device.

S320. The first device detects first feedback information, where the first feedback information is used to feed back a decoding status of the first CBG, where the first CBG belongs to the at least two CBGs.

S330, the first device sends the first indication information and the retransmission CBG to the second device, where the retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate the The receiving status of a feedback message.

In the present application, the first device is any device that sends the CBG, and the second device is any device that receives the CBG. For ease of understanding, as an optional example, the first device is the base station and the second device. The technical solution provided by the present application is described in detail for the UE.

In S310, at least two CBGs may be any two different CBGs. For example, the at least two CBGs may be CBGs sent during initial transmission, or may be CBGs sent during retransmission.

After transmitting the at least two CBGs, the base station knows the format of the feedback information that it expects and the time-frequency resources that the feedback information may occupy, and performs detection on the time-frequency resources that the feedback information may occupy, that is, detects the first feedback information.

In S320, there are two detection results of the first feedback information: detection success and detection failure. The detection success means that the base station detects the first feedback information that the signal strength is higher than the intensity threshold. The detection failure means that the signal strength of the first feedback information is lower than the intensity threshold, or the UE does not send the first feedback information, thereby causing the base station not to Can receive the first feedback information.

When the first feedback information is successfully detected, the base station decodes the first feedback information, where the decoding succeeds, the base station acquires all valid information bits included in the first feedback information, and the verification succeeds. The method is not limited. As an optional example, the first feedback information may be verified by a cyclic redundancy check (CRC) or by a preset check matrix corresponding to the first feedback information. Test. The decoding failure means that the base station acquires all the valid information bits included in the first feedback information but the first feedback information fails to be verified. It can be seen that the decoding success represents the detection success; the undecoded success can indicate that the detection fails, or the detection is successful but the decoding fails.

In addition, in S320, the first feedback information may be used to feed back a decoding status of all CBGs in the at least two CBGs, and the first feedback information may also be used to feed back a decoding status of a part of the CBGs in the at least two CBGs, for at least two CBGs. In decoding the correct CBG, the UE may feed back an acknowledgement (ACK). For a CBG in which decoding is failed in at least two CBGs, the UE may feed back a negative acknowledgement (NACK).

Correspondingly, the first CBG may be at least two CBGs described in S310, or may be a CBG in which the UE is successfully decoded in the at least two CBGs, and may also be a CBG in which the UE decoding fails in the at least two CBGs. When the UE only feeds back the CBG that is successfully decoded in the at least two CBGs, the base station defaults that the CBG that the UE does not feed back is the CBG that fails to be decoded; when the UE only feeds back the CBG that fails to be decoded in the at least two CBGs, the base station defaults to the CBG that the UE does not feed back. For decoding successful CBG.

The first feedback information may be feedback information that feeds back the decoding status of the CBG received by the UE in one time unit, or may be feedback information that feeds back the decoding status of the CBG received by the UE in multiple time units.

In the present application, the length of a time unit can be arbitrarily set, which is not limited in this application.

For example, one time unit may include one or more subframes.

Alternatively, one time unit may include one or more slots or mini-slots.

Alternatively, one time unit may include one or more time domain symbols.

Alternatively, one time unit may include one or more transmission time intervals (TTIs) or short transmission time intervals (sTTIs).

Alternatively, the length of one time unit is 1 millisecond (ms).

Alternatively, the length of one time unit is less than 1 ms.

FIG. 4 shows a schematic flowchart of another method for transmitting a CBG provided by the present application.

The base station transmits four CBGs at TTI i, as shown in FIG. 4, labeled 1, 2, 3, and 4, respectively, and the four CBGs are CBGs that are initially transmitted.

After receiving the 4 CBGs, the UE performs decoding and sends feedback information, and the feedback information feedback marks CBG decoding failures of 1 and 4, and CBG decoding marked 2 and 3 is successful.

The base station detects the feedback information sent by the UE on the predetermined time-frequency resource (including the TTI m), detects and successfully decodes the feedback information, and the base station sends a retransmission CBG to the UE according to the feedback information, that is, the tag. CBG for 1 and 4.

After receiving the CBGs marked 1 and 4, the UE performs decoding, and sends feedback information to the base station again. The CBG decoding failure of the feedback information feedback flag is 1 and the CBG decoding marked 4 is successful.

The base station detects the feedback information sent by the UE again on the predetermined time-frequency resource (including the TTI n). If the signal energy value of the feedback information is lower than the detection threshold of the base station, the base station does not detect the feedback information, or the base station detects After the feedback information is decoded, the base station will transmit a retransmission CBG, that is, a CBG labeled 1 and 4, at TTI k. At the same time, the base station sends the first indication information to the UE at the TTI, indicating that the receiving status of the feedback information sent by the UE is a reception failure. The UE may determine, according to the first indication information and the preset rule, that the CBG received in the TTI k is the CBG marked 1 and 4.

In the method shown in FIG. 4, the first feedback information may refer to the feedback information detected by the base station at TTI m and TTI n, or may only refer to the feedback information detected by the base station in the TTI n. It should be understood that, in the present application, the first The feedback information refers to the feedback information that the base station expects to obtain, and does not limit the base station to be able to obtain the feedback information, and does not limit the UE to necessarily send the feedback information. In addition, at least two CBGs may refer to CBGs sent by the base station in the TTI i, and may also refer to CBGs sent by the base station in the TTI j.

In S330, the receiving state of the first feedback information includes two states, the receiving success and the receiving failure, wherein the receiving success refers to that the base station successfully detects the first feedback information and successfully decodes the first feedback information, and the receiving failure refers to The first feedback information detection fails, or the first feedback information is detected successfully but the first feedback information is decoded.

When the first feedback information is successfully received, the base station determines, according to the first feedback information, the CBG that the UE fails to decode, and retransmits the CBG that the UE fails to decode. When the first feedback information fails to be received, the base station may send a retransmission CBG to the UE according to a preset rule.

As shown in FIG. 4, if the base station does not detect the first feedback information at the TTI m, the base station may send the CBGs marked as 1, 2, 3, and 4 to the UE. If the base station does not detect the first feedback information at the TTI n, the base station The CBG may be sent to the UE, and the base station sends the first indication information to the UE while transmitting the retransmission CBG, and the UE determines, according to the first indication information, that the first feedback information is received, and according to the pre- The rule is set to determine that the retransmission CBG is a CBG labeled 1, 2, 3, 4.

For another example, if the base station does not detect the first feedback information that is sent by the UE in the TTI n, the base station sends the first indication information indicating that the first feedback information is received to the UE, and retransmits the CBGs labeled 1 and 4 to the UE. After receiving the first indication information, the UE determines that the base station performs retransmission according to the last retransmitted CBG, that is, the UE determines that the retransmission CBG received in the TTI k is the CBG marked 1 and 4.

For another example, when the first indication information indicates that the receiving state of the first feedback information is that the receiving is successful, the UE determines that the received retransmission CBG is the CBG that the UE currently fails to decode. As shown in FIG. 4, if the base station successfully decodes the first feedback information detected by the TTI m, the base station may send the first indication information and the CBGs labeled 1 and 4 to the UE in the TTI j, where the first indication information indicates the first feedback. After the information is successfully decoded, the UE determines that the CBG received by the UE between TTI j and TTI n is the current decoding failure CBG, that is, the CBGs marked 1 and 4 after receiving the first indication information.

The first indication information may be carried in the scheduling information, where the scheduling information is used to schedule the UE to receive the retransmission CBG, and the first indication information may also be carried in other information, and the first indication information may also be separately sent by the base station to the UE. The manner of transmitting the first indication information and the specific form are not limited.

The foregoing embodiment is only an example, and the method for sending a CBG provided by the present application is not limited thereto.

For example, the retransmission CBG may be transmitted in a grant-based manner or in a grant-free manner. The spectrum resource used for transmitting the retransmitted CBG may be a licensed spectrum or may be unlicensed. Spectrum or other shared spectrum.

For example, in an ultra-reliable and low-latency communication (URLLC) scenario, the base station may continuously transmit K times of CBGs without waiting for feedback from the UE, and the UE may send the C-bits to the CBG for combined decoding and transmission. First feedback information.

It should be understood that in the present application, “when”, “if” and “if” mean that the UE or the base station will perform corresponding processing under certain objective conditions, not limited time, and does not require the UE or The base station must have a judgment action when it is implemented, and does not mean that there are other restrictions.

In summary, the method for transmitting a CBG provided by the present application enables the device that sends the CBG to successfully retransmit the CBG in the case of missed detection or unsuccessfully decoding the feedback information, thereby improving the transmission efficiency of the communication system.

Optionally, the method 300 further includes:

S340. The first device determines the retransmission CBG according to the reference feedback information, where the reference feedback information is the first feedback information that is successfully decoded in the first period of the first feedback information.

Optionally, the reference feedback information is specifically:

Detecting, in the first feedback information, the first feedback information that is the closest to the retransmission time unit of the time unit, where the detection time unit is a time unit that the first device detects the first feedback information, where The retransmission time unit sends the time unit of the retransmission CBG to the first device.

The preset time period may be set arbitrarily. For example, the preset time period may be set from a time unit that sends the initial transmission CBG to a time unit that currently transmits the retransmission CBG, or the preset time period may be The preset time period corresponding to the first indication information is TTI j to TTI k, for example, for determining the retransmission CBG in the current TTI k, between the time units of the CBG in the at least two CBGs.

As shown in FIG. 4, if the base station successfully decodes the first feedback information detected by the TTI m and the TTI n, the base station may determine that the reference feedback information is the first feedback information that the UE sends in the TTI n.

If the base station successfully decodes the first feedback information detected by the TTI, and the base station does not detect the first feedback information at the TTI n, the base station may determine that the reference feedback information is the first feedback information detected at the TTI m, where the TTI k is the retransmission time unit, the first feedback information detected at the TTI m, that is, the first feedback information that is successfully decoded within the preset time period, and the first feedback information that is the closest to the retransmission time unit of the time unit is detected.

After the base station determines the reference feedback information, the CBG that is not successfully decoded by the UE is determined according to the reference feedback information, so that the CBG that needs to be retransmitted is determined. For example, those CBGs whose decoding status is NACK in the reference feedback information are determined to be the current retransmission CBG.

Still taking FIG. 4 as an example, the first feedback information that is the closest to the retransmission time unit of the detection time unit is the first feedback information detected by the base station at the TTI n, and the first indication information may only indicate the reception of the first feedback information detected by the TTI n. For example, the first indication information may be 1 bit. When the reception status of the first feedback information detected by the TTI n is successful, the first indication information is “1”; when the first feedback information is detected by the TTI n When the receiving status is reception failure, the first indication information is “0”.

Therefore, on the premise that the UE does not miss the scheduling information of the base station, the UE may directly determine the receiving state of the first feedback information that is sent last time according to the first indication information.

As shown in FIG. 4, if the base station successfully detects the first feedback information in the TTI m and successfully decodes the first feedback information, and does not detect the first feedback information in the TTI n, the first indication information sent by the base station in the TTI j is The number of indications is 1, and the number indicated by the first indication information sent by the base station in the TTI k is 1. After receiving the first indication information sent by the base station in the TTI k, the UE indicates, according to the first indication information received last time. The number determines that the first feedback information successfully decoded by the base station is NAAN, thereby determining that the retransmission CBG transmitted by the base station at TTI k is the CBGs marked 1 and 4.

Even if the UE misses the scheduling information of the nth transmission of the base station, if the UE successfully decodes the scheduling information of the n+1th transmission of the base station, the foregoing embodiment can enable the UE to successfully receive the weight of the base station in the n+1th transmission. Pass CBG.

The first indication information may be set to indicate four states: "00", "01", "10", "11". The base station and the UE may agree on the meaning of the first indication information that is first transmitted. For example, it may be agreed that when the first indication information that is first transmitted indicates that the base station does not successfully receive the first feedback information, the first indication information is “00” when the first transmission is performed. When the first indication information indicates that the base station successfully receives the first feedback information, the first indication information is “11”, and the first feedback information is successfully received every time, and the state indicated by the first indication information changes according to a preset rule. Once, if the first feedback information is not successfully received, the state of the first indication information does not change.

Referring back to FIG. 4, if the base station successfully detects the first feedback information in the TTI m and then successfully decodes the first feedback information, the first indication information sent by the base station in the TTI j may be “11”; if the base station is in the TTI n If the first feedback information is not detected, the first indication information sent by the base station in the TTI k may be “11”, and the UE does not detect that the status of the first indication information does not change, and determines that the base station does not detect the first feedback sent by the UE. If the base station successfully detects the first feedback information in the TTI, and then successfully decodes the first feedback information, the first indication information sent by the base station in the TTI k may be “00”, and the UE indicates according to the first indication information. The state changes to determine that the base station successfully decodes the first feedback information that the UE sent last time. It can be seen that, each time the base station successfully receives the first feedback information, the state of the first indication information is set in a predefined order. For example, if the first state is “00”, the predefined order may be "00", "01", "10", "11", "00"..., and so on.

In this way, even if the UE misses the scheduling information that the base station transmits at a certain time, the above embodiment can enable the UE to successfully receive the retransmission CBG sent by the base station.

Optionally, in another embodiment, if the number of bits of the first indication information is smaller than the total number of CBGs included in the TB, for example, the total number of CBGs in FIG. 4 is 4, and the number of bits of the first indication information is 2, the foregoing is performed. For example, if the number of bits of the first indication information is greater than or equal to the total number of CBGs included in the TB, for example, the number of bits of the first indication information is 4, it is not necessary to perform the first indication information in the foregoing embodiment for indicating the location. The step of describing the receiving state of the first feedback information, but the first indication information is directly used to indicate which CBGs are the current retransmission CBGs, for example, the retransmissions CBG1 and CBG4 in the TTI k in FIG. 4 can be used by the 4 The first indication information of the bits is indicated as "1001", where bit 1 is represented as those CBGs that are currently being retransmitted, and bit 0 indicates that these CBGs are not currently being retransmitted.

The method for transmitting CBG provided by the present application is described in detail from the perspective of the first device. The method for receiving the CBG provided by the present application will be introduced from the perspective of the second device.

FIG. 5 shows a schematic flowchart of a method for receiving a CBG provided by the present application. Method 500 includes:

S510. The second device receives at least two CBGs from the first device.

S520. The second device sends first feedback information to the first device, where the first feedback information is used to feed back a decoding status of the first CBG, where the first CBG belongs to the at least two CBGs.

S530, the second device receives the first indication information and the retransmission CBG from the first device, where the retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate the The receiving status of a feedback message.

In method 500, the second device can be, for example, a UE, and the first device can be, for example, a base station.

If the UE sends the first feedback information, and then receives the first indication information that is sent by the base station to indicate that the first feedback information is failed to be received, the UE may determine, according to a rule agreed by the base station, that the currently received retransmission CBG is a previous time. And transmitting, by the first feedback information that is successfully transmitted, the UE decoding the failed CBG, where the successful transmission refers to that the UE sends the first feedback information and the base station successfully decodes the first feedback information.

As shown in FIG. 4, the four CBGs sent by the base station in the TTI i are the initial CBGs. If the UE does not receive the scheduling information for scheduling the initial CBG, the UE will miss the initial CBG and will not send the first. The information is sent by the base station to the first indication information indicating that the base station does not detect the first feedback information, and the four CBGs are retransmitted according to the preset rule, and the UE determines the first indication information according to the preset rule. The received retransmission CBG is actually the CBG of the initial transmission.

It can be clearly understood by those skilled in the art that in the method 500, the base station and the UE can be identical to the base station and the UE in the method 300, and the actions of the base station and the UE correspond to the actions of the base station and the UE in the method 300, in order to Concise, no longer repeat here.

Optionally, the method 500 further includes:

S540: The second device determines, according to the first indication information, reference feedback information, where the reference feedback information is the first feedback information that is successfully decoded by the first device in a preset time period.

S550. The second device determines the retransmission CBG according to the reference feedback information.

Optionally, the reference feedback information is specifically:

Transmitting, by the time unit, the first feedback information that is the closest to the retransmission time unit, where the sending time unit is a time unit that sends the first feedback information by the second device, where the retransmission time unit is The second device receives the time unit of the retransmission CBG.

The preset time period may be arbitrarily set, and the reference feedback information may be the first feedback information that is successfully transmitted any time before the UE receives the first indication information.

Therefore, after determining the reference feedback information, the UE determines, according to the reference feedback information, which CBGs the retransmission CBG is currently received.

An example of the method of resource scheduling provided by the present application is described in detail above. It can be understood that the first device and the second device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The present application may divide a functional unit into a first device or the like according to the above method example. For example, each functional unit may be divided according to each function, or two or more functions may be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.

In the case of employing an integrated unit, FIG. 6 shows a possible structural diagram of the first device involved in the above embodiment. The first device 600 includes a processing unit 602 and a communication unit 603. The processing unit 602 is configured to control and manage the actions of the first device 600. For example, the processing unit 602 is configured to support the first device 600 to perform S320 of FIG. 3 and/or other processes for the techniques described herein. The communication unit 603 is configured to support communication of the first device 600 with other network entities, such as communication with the second device. The first device 600 may further include a storage unit 601 for storing program codes and data of the first device 600.

The processing unit 602 can be a processor or a controller, for example, can be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (application-specific). Integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 603 can be a transceiver, a transceiver circuit, or the like. The storage unit 601 can be a memory.

The first device 600 provided by the present application can successfully retransmit the CBG in the case of missed detection or unsuccessfully decoding the feedback information, thereby improving the transmission efficiency of the communication system.

When the processing unit 602 is a processor, the communication unit 603 is a transceiver, and the storage unit 601 is a memory, the first device involved in the present application may be the first device shown in FIG.

Referring to FIG. 7, the first device 700 includes a processor 702, a transceiver 703, and a memory 701. The transceiver 703, the processor 702, and the memory 701 can communicate with each other through an internal connection path to transfer control and/or data signals.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the device and the unit described above can refer to the corresponding process in the foregoing method embodiments, and no further details are provided herein.

The first device 700 provided by the present application can successfully retransmit the CBG in the case of missed detection or unsuccessfully decoding the feedback information, thereby improving the transmission efficiency of the communication system.

In the case of employing an integrated unit, FIG. 8 shows a possible structural diagram of the second device involved in the above embodiment. The second device 800 includes a processing unit 802 and a communication unit 803. The processing unit 802 is configured to control and manage the actions of the second device 800. For example, the processing unit 802 is configured to support the second device 800 to perform S510 of FIG. 5 and/or other processes for the techniques described herein through the communication unit 803. . The communication unit 803 is configured to support communication of the second device 800 with other network entities, such as communication with the first device. The second device 800 may further include a storage unit 801 for storing program codes and data of the second device 800.

The processing unit 802 can be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 803 can be a transceiver, a transceiver circuit, or the like. The storage unit 801 can be a memory.

The second device 800 for data transmission provided by the present application can successfully receive the retransmission CBG in the case of a device that transmits the CBG or fails to successfully decode the feedback information, thereby improving the transmission efficiency of the communication system.

When the processing unit 802 is a processor, the communication unit 803 is a transceiver, and the storage unit 801 is a memory, the second device involved in the present application may be the second device shown in FIG.

Referring to FIG. 9, the second device 900 includes a processor 902, a transceiver 903, and a memory 901. The transceiver 903, the processor 902, and the memory 901 can communicate with each other through an internal connection path to transfer control and/or data signals.

The second device 900 for data transmission provided by the present application can successfully receive the retransmission CBG when the device transmitting the CBG misses the detection or fails to decode the feedback information, thereby improving the transmission efficiency of the communication system.

In the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the present application.

In addition, the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

The steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions. The software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the terminal device. Of course, the processor and the storage medium can also exist as discrete components in the first device and the second device.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted by a computer readable storage medium. The computer instructions may be from a website site, computer, server or data center via a wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Another website site, computer, server, or data center for transmission. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD), or a semiconductor medium (eg, a solid state disk (SSD)). Wait.

The specific embodiments of the present invention have been described in detail with reference to the specific embodiments of the present application. It is to be understood that the foregoing description is only The scope of protection, any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application are included in the scope of protection of the present application.

Claims

A method for transmitting a coded block group, the method comprising:

The first device sends at least two coding block groups CBG to the second device;

The first device detects first feedback information, where the first feedback information is used to feed back a decoding status of the first CBG, and the first CBG belongs to the at least two CBGs;

The first device sends the first indication information and the retransmission CBG to the second device, where the retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate the first feedback. The receiving status of the information.
The method of claim 1 further comprising:

Determining, by the first device, the retransmission CBG according to the reference feedback information, where the reference feedback information is the first feedback information that is successfully decoded in the preset time period in the detected first feedback information.
The method according to claim 2, wherein the reference feedback information is specifically:

Detecting, in the first feedback information, the first feedback information that is the closest to the retransmission time unit of the time unit, where the detection time unit is a time unit that the first device detects the first feedback information, where The retransmission time unit sends the time unit of the retransmission CBG to the first device.
The method according to any one of claims 1 to 3, wherein the first indication information is specifically used to indicate a receiving state of the first feedback information that is the closest to the retransmission time unit by the detecting time unit, wherein The detecting time unit is a time unit that the first device detects the first feedback information, and the retransmission time unit is a time unit that sends the retransmitted CBG to the first device.
The method according to any one of claims 1 to 3, wherein the first indication information is specifically used to indicate the number of the first feedback information that is successfully decoded in the detected first feedback information.
The method according to any one of claims 1 to 3, wherein the first indication information is used to indicate at least two states, and the at least two states correspond to at least the detected first feedback information. The first feedback information that is adjacent to the detection unit and is successfully decoded, the detection time unit is a time unit in which the first device detects the first feedback information.
A method for receiving a coded block group, the method comprising:

The second device receives at least two coded block groups CBG from the first device;

The second device sends first feedback information to the first device, where the first feedback information is used to feed back a decoding status of the first CBG, and the first CBG belongs to the at least two CBGs;

The second device receives the first indication information and the retransmission CBG from the first device, where the retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate the first feedback. The receiving status of the information.
The method of claim 7, wherein the method further comprises:

Determining reference feedback information according to the first indication information, where the reference feedback information is the first feedback information that is successfully decoded by the first device in a preset time period;

The second device determines the retransmission CBG according to the reference feedback information.
The method according to claim 8, wherein the reference feedback information is specifically:

Transmitting, by the time unit, the first feedback information that is the closest to the retransmission time unit, where the sending time unit is a time unit that sends the first feedback information by the second device, where the retransmission time unit is The second device receives the time unit of the retransmission CBG.
The method according to any one of claims 7 to 9, wherein the first indication information is specifically used to indicate a receiving state of the first feedback information that is the closest to the retransmission time unit by the sending time unit, wherein The sending time unit is a time unit for sending the first feedback information by the second device, where the retransmission time unit is a time unit that the second device receives the retransmitted CBG.
The method according to any one of claims 7 to 9, wherein the first indication information is specifically used to indicate the number of the first feedback information successfully decoded by the first device.
The method according to any one of claims 7 to 9, wherein the first indication information is used to indicate at least two states, and the at least two states correspond to at least two transmission time units adjacent to the The first feedback information successfully decoded by the first device, where the sending time unit is a time unit for sending the first feedback information by the second device.
An apparatus for transmitting a coded block group, the device comprising a processing unit and a communication unit, wherein the processing unit and the communication unit communicate with each other through an internal connection path,

The communication unit is configured to send at least two coded block groups CBG to the second device;

The processing unit is configured to detect first feedback information, where the first feedback information is used to feed back a decoding status of the first CBG, and the first CBG belongs to the at least two CBGs;

The communication unit is further configured to send the first indication information and the retransmission CBG to the second device, where the retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate the The receiving status of a feedback message.
The device according to claim 13, wherein the processing unit is further configured to:

Determining the retransmission CBG according to the reference feedback information, where the reference feedback information is the first feedback information that is successfully decoded in the first period of the first feedback information.
The device according to claim 14, wherein the reference feedback information is specifically:

Detecting, in the first feedback information, the first feedback information that is the closest to the retransmission time unit of the time unit, where the detection time unit is a time unit that the first device detects the first feedback information, where The retransmission time unit sends the time unit of the retransmission CBG to the first device.
The device according to any one of claims 13 to 15, wherein the first indication information is specifically used to indicate a receiving state of the first feedback information that is the closest to the retransmission time unit by the detecting time unit, wherein The detecting time unit is a time unit that the first device detects the first feedback information, and the retransmission time unit is a time unit that sends the retransmitted CBG to the first device.
The apparatus according to any one of claims 13 to 15, wherein the first indication information is specifically used to indicate the number of the first feedback information that is successfully decoded in the detected first feedback information.
The device according to any one of claims 13 to 15, wherein the first indication information is used to indicate at least two states, and the at least two states correspond to at least the detected first feedback information. The first feedback information that is adjacent to the detection unit and is successfully decoded, the detection time unit is a time unit in which the first device detects the first feedback information.
An apparatus for receiving a coded block group, the device comprising a processing unit and a communication unit, wherein the processing unit and the communication unit communicate with each other through an internal connection path,

The communication unit is configured to receive at least two coded block groups CBG from the first device;

The communication unit is further configured to send first feedback information to the first device, where the first feedback information is used to feed back a decoding status of the first CBG, where the first CBG belongs to the at least two CBGs;

The communication unit is further configured to receive the first indication information and the retransmission CBG from the first device, where the retransmission CBG belongs to the at least two CBGs, and the first indication information is used to indicate the The receiving status of a feedback message.
The device according to claim 19, wherein the processing unit is configured to:

Determining reference feedback information according to the first indication information, where the reference feedback information is the first feedback information successfully decoded by the first device in a preset time period;

Determining the retransmission CBG according to the reference feedback information.
The device according to claim 20, wherein the reference feedback information is specifically:

Transmitting, by the time unit, the first feedback information that is closest to the retransmission time unit, where the sending time unit is a time unit that sends the first feedback information by the communication unit, where the retransmission time unit is the communication The unit receives the time unit of the retransmission CBG.
The device according to any one of claims 19 to 21, wherein the first indication information is specifically used to indicate a receiving state of the first feedback information that is the closest to the retransmission time unit by the sending time unit, wherein And the sending time unit is a time unit that sends the first feedback information to the communications unit, where the retransmission time unit is a time unit in which the communications unit receives the retransmitted CBG.
The apparatus according to any one of claims 19 to 21, wherein the first indication information is specifically used to indicate the number of the first feedback information successfully decoded by the first device.
The apparatus according to any one of claims 19 to 21, wherein the first indication information is used to indicate at least two states, and the at least two states correspond to at least two transmission time units adjacent to the The first feedback information successfully decoded by the first device, where the sending time unit is a time unit for sending the first feedback information by the communication unit.