CN108809529B

CN108809529B - Data transmission method, terminal and base station

Info

Publication number: CN108809529B
Application number: CN201710314107.7A
Authority: CN
Inventors: 高雪娟; 托尼; 郑方政
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2021-08-10
Anticipated expiration: 2037-05-05
Also published as: CN108809529A; WO2018201905A1

Abstract

The invention discloses a data transmission method, a terminal and a base station. The method comprises the following steps: a terminal acquires at least one CBG in a downlink shared channel and a first indication domain corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG; and the terminal identifies each CBG according to the first indication information. The invention provides a new data transmission method.

Description

Data transmission method, terminal and base station

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, a terminal, and a base station.

Background

With the development of mobile communication service demand, organizations such as International Telecommunication Union (ITU) and third Generation Partnership Project (3 GPP) have begun to research New wireless communication systems such as 5G-NR (New Radio, NR) system. In the LTE system, data transmission between a terminal and a base station is performed in Transport Block (TB) units, that is, both the terminal and the base station perform data transmission based on the TB. For example, after receiving the TB, the terminal performs ACK/NACK feedback only for the TB, and may feed back an ACKnowledgement (ACK) or a Negative ACKnowledgement (NACK) to inform the base station whether the TB received by the terminal is correct. Usually, a TB includes at least one CB, that is, only if all CBs in a TB are correctly received, the terminal feeds back ACK only if the TB is correctly received, and as long as one CB in the TB is incorrectly received, the feedback information of the TB is NACK. Then, after receiving the NACK, the base station retransmits the TB. Therefore, when data transmission is performed in the LTE system by using the TB as a unit, unnecessary retransmission redundancy is likely to occur, and transmission efficiency is low. While the 5G system supports more services, if the TB-based data transmission method of the LTE system is still used, the transmission of the services will be affected, so the TB-based data transmission method of the LTE system is no longer applicable to the 5G-NR system or other new wireless communication systems.

Disclosure of Invention

The invention provides a data transmission method, a terminal and a base station, which are used for providing a new data transmission mode.

A first aspect of the present invention provides a data transmission method, including:

a terminal acquires at least one CBG in a downlink shared channel and a first indication domain corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

and the terminal identifies each CBG according to the first indication information.

Optionally, the bit number of the first indication information is determined based on the number of CBGs in the downlink shared channel.

Optionally, the first indication field further includes second indication information, where the second indication information is used to indicate whether previous or previous transmissions of a CBG corresponding to the CBG number indicated by the first indication information are damaged, and/or indicate whether previous or previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information are damaged, and/or indicate whether previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information are damaged

The second indication information is used for indicating which CBs in the previous or previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information are damaged, wherein the CBG comprises at least one CB, and/or

The second indication information is used for indicating which symbols of the previous or previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information are damaged.

Optionally, the bit number of the second indication information is determined according to the indication content of the second indication information.

Optionally, the method further includes:

the terminal determines whether the second indication information exists in the first indication domain or whether the second indication information is valid according to at least one of the following ways;

mode 1: the first indication domain contains third indication information, and the third indication information is used for indicating whether the first indication domain contains the second indication information or whether the second indication information is valid;

mode 2: the downlink shared channel comprises a second indication domain, and the second indication domain is used for indicating whether the first indication domain has the second indication information or whether the second indication information is valid;

mode 3: a fifth indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the fifth indication field is used for indicating whether the second indication information exists in the first indication field or whether the second indication information is valid;

in the method 4, when it is determined that the downlink shared channel is a retransmission, it is determined that the first indication field includes the second indication information or the second indication information is valid, and otherwise, it is determined that the first indication field does not include the second indication information or the second indication information is invalid.

Optionally, the third indication information is encoded independently from the first indication information or the second indication information in the first indication domain; the second indication field is encoded independently of the first indication field.

Optionally, before the terminal acquires the first indication domain corresponding to each CBG in the downlink shared channel, the method further includes:

the terminal judges whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid according to at least one of the following modes;

mode 1: the terminal receives a high-level signaling, the high-level signaling configures whether the terminal supports CBG-based transmission, and when the terminal supports CBG-based transmission, the terminal determines that the first indication domain exists or the first indication domain is valid, otherwise, the terminal determines that the first indication domain does not exist or the first indication domain is invalid;

mode 2: a third indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the third indication field is used to indicate whether a CBG has the corresponding first indication field or whether the first indication field is valid;

mode 3: the downlink shared channel further includes a fourth indication field, where the fourth indication field is used to indicate whether a CBG has the corresponding first indication field or whether the first indication field is valid;

mode 4: and when the downlink shared channel is judged to be retransmission, determining that the first indication domain exists in the CBG or the first indication domain is valid, otherwise, determining that the first indication domain does not exist in the CBG or the first indication domain is invalid.

Optionally, the fourth indication field is encoded independently from the first indication field.

Optionally, the first indication field and a CB in a CBG corresponding to the first indication field are independently encoded.

Optionally, the first indication field corresponding to each CBG is transmitted in a puncturing or rate matching manner in the predefined resource corresponding to the CBG.

Optionally, when the terminal determines, according to the second indication information, that previous or previous transmissions of a CBG corresponding to a CBG number indicated by the first indication information in the first indication field included in the CBG corresponding to the second indication information are damaged, the method further includes:

and the terminal clears the stored data damaged in the previous or previous transmissions of the CBG, or covers the data damaged in the previous or previous transmissions of the CBG with the corresponding data in the CBG received through the downlink shared channel.

A second aspect of the present invention provides a data transmission method, including:

the base station generates at least one CBG and a first indication domain corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

and the base station sends the at least one CBG and the first indication domain in a downlink shared channel.

Optionally, the method further includes:

the base station determines whether the second indication information exists in the first indication domain or whether the second indication information is valid according to at least one of the following ways;

mode 1: the first indication domain contains third indication information, and the third indication information is used for indicating whether the first indication domain contains the second indication information or whether the second indication information is valid; the base station determines whether the first indication domain has the second indication information or whether the second indication information is valid or not, and indicates the first indication domain to a terminal through the third indication information;

mode 2: the downlink shared channel further comprises a second indication domain, and the second indication domain is used for indicating whether the first indication domain has the second indication information or whether the second indication information is valid; the base station determines whether the first indication domain has the second indication information or whether the second indication information is valid or not, and indicates the first indication domain to a terminal through the second indication domain;

mode 3: a fifth indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, wherein the fifth indication field is used for indicating whether the second indication information exists in the first indication field or whether the second indication information is valid; the base station determines whether the first indication domain has the second indication information or whether the second indication information is valid or not, and indicates the first indication domain to a terminal through a fifth indication domain;

Optionally, before the base station generates the first indication field corresponding to each CBG, the method further includes:

the base station judges whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid according to at least one of the following modes;

the method comprises the following steps: the base station determines whether the terminal supports CBG-based transmission or not, informs the terminal through a high-level signaling, determines that a first indication domain exists or the first indication domain is valid when the terminal determines the support, and otherwise determines that the first indication domain does not exist or the first indication domain is invalid;

the method 2 comprises the following steps: a third indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the third indication field is used to indicate whether a CBG has the corresponding first indication field or whether the first indication field is valid; the base station determines whether the first indication domain exists or whether the first indication domain is effective or not, and informs a terminal through the third indication domain;

the method 3 comprises the following steps: the downlink shared channel further comprises a fourth indication domain, and the fourth indication domain is used for indicating whether the CBG has the corresponding first indication domain or whether the first indication domain is valid; the base station determines whether the first indication domain exists or whether the first indication domain is effective or not, and informs a terminal through the fourth indication domain;

A third aspect of the present invention provides a terminal, including:

an obtaining unit, configured to obtain at least one CBG in a downlink shared channel and a first indication field corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

and the processing unit is used for identifying each CBG according to the first indication information.

Optionally, the processing unit is further configured to:

determining whether the second indication information is present in the first indication field or whether the second indication information is valid in at least one of the following manners;

Optionally, the processing unit is further configured to:

judging whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid according to at least one of the following modes;

mode 1: receiving a high-level signaling, wherein the high-level signaling configures whether the terminal supports CBG-based transmission, and when the high-level signaling supports CBG-based transmission, the terminal determines that the first indication domain exists or the first indication domain is valid, otherwise, the terminal determines that the first indication domain does not exist or the first indication domain is invalid;

Optionally, when the terminal determines, according to the second indication information, that previous transmission or previous transmission of a CBG corresponding to a CBG number indicated by the first indication information in the first indication field included in the CBG corresponding to the second indication information is damaged, the processing unit is further configured to:

and clearing the stored data damaged in the previous or previous transmissions of the CBG, or covering the data damaged in the previous or previous transmissions of the CBG with the corresponding data in the CBG received through the downlink shared channel.

A fourth aspect of the present invention provides a base station, comprising:

the processing unit is used for generating at least one CBG and a first indication domain corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

a sending unit, configured to send the at least one CBG and the first indication field in a downlink shared channel.

Optionally, the processing unit is further configured to:

mode 1: the first indication domain contains third indication information, and the third indication information is used for indicating whether the first indication domain contains the second indication information or whether the second indication information is valid; the processing unit determines whether the second indication information exists in the first indication domain or whether the second indication information is valid or not, and sends the third indication information to a terminal through the sending unit;

mode 2: the downlink shared channel further comprises a second indication domain, and the second indication domain is used for indicating whether the first indication domain has the second indication information or whether the second indication information is valid; the processing unit determines whether the first indication domain has the second indication information or whether the second indication information is valid or not, and sends the second indication domain to the terminal through the sending unit;

mode 3: a fifth indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, wherein the fifth indication field is used for indicating whether the second indication information exists in the first indication field or whether the second indication information is valid; the processing unit determines whether the first indication domain has the second indication information or whether the second indication information is valid or not, and sends a fifth indication domain to the terminal through the sending unit;

Optionally, the processing unit is further configured to:

the method comprises the following steps: determining whether the terminal supports CBG-based transmission or not, notifying the terminal through high-level signaling, and when the support is determined, determining that a first indication domain exists or the first indication domain is valid, otherwise, determining that the first indication domain does not exist or the first indication domain is invalid;

the method 2 comprises the following steps: a third indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the third indication field is used to indicate whether a CBG has the corresponding first indication field or whether the first indication field is valid; the processing unit determines whether the first indication domain exists or whether the first indication domain is valid, and sends the third indication domain to a terminal through the sending unit;

the method 3 comprises the following steps: the downlink shared channel further comprises a fourth indication domain, and the fourth indication domain is used for indicating whether the CBG has the corresponding first indication domain or whether the first indication domain is valid; the processing unit is further configured to determine whether the first indication domain exists or whether the first indication domain is valid, and send the fourth indication domain to the terminal through the sending unit;

A fifth aspect of the invention provides a computer apparatus comprising a processor for implementing the steps of the data transmission method as provided in the first or second aspect of the invention when executing a computer program stored in a memory.

A sixth aspect of the invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the data transmission method as provided in the first or second aspect of the invention.

The technical scheme in the embodiment of the invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, a terminal acquires a first indication domain corresponding to each CBG in a downlink shared channel; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG; and the terminal identifies each CBG according to the first indication information. Namely, the invention carries out data retransmission and corresponding ACK/NACK feedback by taking the CBG as a unit, and one CBG usually comprises at least one CB, so that one TB can be divided into at least one CBG, thereby improving the transmission efficiency. And each CBG has a number such that the base station and terminal have a consistent understanding of each CBG in the retransmission.

Drawings

Fig. 1 is a flowchart of a data transmission method at a terminal side according to an embodiment of the present invention;

fig. 2 is a flowchart of a data transmission method at a base station side according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a transmission resource required for determining a first indication field according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a first indication field according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention.

Detailed Description

In order to solve the technical problems, the general idea of the invention is as follows:

in the technical scheme provided by the embodiment of the invention, a terminal acquires a first indication domain corresponding to each CBG in a downlink shared channel; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG; and the terminal identifies each CBG according to the first indication information. Namely, the base station and the terminal perform data retransmission and ACK/NACK feedback in CBG units, and a CBG usually includes at least one CB, so that one TB can be divided into at least one CBG. Moreover, due to the error probability of ACK/NACK transmission itself, it may cause the terminal to transmit the feedback information of a CBG as NACK, and the base station to understand as ACK, or vice versa, thereby causing the terminal and the base station to understand the retransmitted CBGs inconsistently, resulting in erroneous Hybrid Automatic Repeat reQuest (HARQ) combining.

In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features of the embodiments and the examples of the present invention can be combined with each other without conflict.

Fig. 1 and fig. 2 are referred to simultaneously, and fig. 1 is a flowchart of a data transmission method at a terminal side according to an embodiment of the present invention. The data transmission method at the terminal side can be applied to terminals in wireless communication systems such as an LTE system, an NR system, and the like, and the terminals include, but are not limited to, mobile phones, tablet computers, and the like. The present invention also provides a data transmission method at a base station side, corresponding to the data transmission method at the terminal side of fig. 1. Fig. 2 is a flowchart of a data transmission method at a base station side according to an embodiment of the present invention. The configuration method of the data transmission method at the base station side may be applied to a base station in a wireless communication system, such as a Long Term Evolution (LTE) system, an NR (New Radio, NR) system, and the like, where the base station may be a macro base station, a home base station, and the like, and may also be another base station. As shown in fig. 1, the method for configuring random access resources at a terminal side includes:

step 101: a terminal acquires at least one CBG in a downlink shared channel and a first indication domain corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

step 102: and the terminal identifies each CBG according to the first indication information.

As shown in fig. 2, the data transmission method at the base station side includes:

step 201: the base station generates at least one CBG and a first indication domain corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

step 202: and the base station sends the at least one CBG and the first indication domain in a downlink shared channel.

Before describing step 101, a manner of communication between a terminal and a network device in an LTE system is first described, please refer to fig. 2, which is a schematic diagram of communication between a network device and a terminal in an LTE system according to an embodiment of the present invention. Fig. 2 illustrates a network device as a base station. As shown in the figure, the terminal receives Downlink data transmitted by the network device through a Physical Downlink Shared Channel (PDSCH), transmits Uplink data to the base station through a Physical Uplink Shared Channel (PUSCH), and transmits ACK/NACK feedback information of the received Downlink data to the base station through a Physical Uplink Control Channel (PUCCH). In the LTE system, one PDSCH or PUSCH channel can support 1 or 2 TBs for data transmission in Transport Block (TB) units per transmission between a terminal and a base station. Due to the limitation of the processing degree of the encoder, one TB needs to be divided into K Code Blocks (CBs), and if ACK/NACK feedback and retransmission are performed one-to-one for each CB, the number of ACK/NACK feedback bits is large.

In the embodiment of the present invention, a base station generates at least one CBG and a first indication field corresponding to each CBG in the at least one CBG, and correspondingly, a terminal acquires the at least one CBG in a downlink shared channel and the first indication field corresponding to each CBG in the at least one CBG. That is to say, each retransmission and ACK/NACK feedback between the terminal and the base station are based on CBGs, one TB is divided into a plurality of CBGs during initial transmission, each CBG includes at least one CB, and each CBG corresponds to an ACK/NACK, so that if the feedback of some CBGs is NACK, the wrong CBG transmitted in the plurality of CBGs into which the TB is divided during initial transmission only needs to be retransmitted during retransmission, thereby avoiding retransmission of the whole TB, i.e., avoiding redundant retransmission of the correct CBG in this province, and improving transmission efficiency.

Optionally, before step 101, the method further includes:

and the terminal judges whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid according to at least one of the following modes.

It should be noted that valid may be understood as that the terminal needs to read a certain part of content and perform a corresponding operation according to the specific indication content of the part of content, and invalid may be understood as that although the bit number of the part of content exists (in a reserved state), the terminal is not required to perform a reading operation, and therefore the terminal may not know what the part of content indicates, and therefore the terminal does not perform a corresponding operation according to the indication of the part of content. Of course, the definition of valid or invalid is determined by those skilled in the art according to the actual situation, and the present invention is not limited specifically.

Mode 1: the terminal receives a high-level signaling, the high-level signaling configures whether the terminal supports CBG-based transmission, and when the terminal supports CBG-based transmission, the terminal determines that the first indication domain exists or the first indication domain is valid, otherwise, the terminal determines that the first indication domain does not exist or the first indication domain is invalid.

Mode 2: and a third indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the third indication field is used to indicate whether a CBG has the corresponding first indication field or whether the first indication field is valid. For example, "1" means inclusive, "0" means exclusive, or vice versa.

Mode 3: the downlink shared channel further includes a fourth indication field, where the fourth indication field is used to indicate whether the CBG has the corresponding first indication field or whether the first indication field is valid.

Optionally, each CBG may correspond to a fourth indication field, that is, the fourth indication field may independently indicate whether the first indication field is included in each CBG or whether the first indication field is valid. For example, a CBG corresponds to 1-bit fourth indication field information, and when the CBG is "0", it indicates that the CBG does not include the first indication field or the first indication field is invalid, and when the CBG is "1", it indicates that the CBG includes the first indication field or the first indication field is valid. The fourth indication field may also correspond to all CBGs, that is, the downlink shared channel only includes one fourth indication field, and the fourth indication field is valid for all CBGs, for example, 1-bit information indicates that all CBGs do not include the first indication field or the first indication field is invalid when the value is "0", and indicates that all CBGs include the first indication field or the first indication field is valid when the value is "1".

Specifically, whether the downlink shared channel is a retransmission or not may be determined by an indication field in a downlink control channel used for scheduling the downlink shared channel, for example, an HARQ process number indicated in the downlink control channel is the same as a process number corresponding to a previously received data packet, and the downlink control channel is indicated as a retransmission (for example, determined as a retransmission according to NDI); whether retransmission is required or not may be determined according to different DCI formats used for scheduling the downlink control channel of the downlink shared channel (for example, the number of bits is different, or which format the indication field indicates in DCI) and/or different used RNTIs, for example, DCI format 1 is used for scheduling initial transmission, DCI format 2 is used for scheduling retransmission, DCI sizes of DCI formats 1 and 2 are different, or RNTI1 is used for scheduling initial transmission, RNTI2 is used for scheduling retransmission, or the like, which may be a combination of the two.

The terminal firstly judges whether the first indication domain exists or is valid according to the modes 1-4, when the first indication domain exists or is valid, the first indication domain is further analyzed/read, otherwise, if the first indication domain does not exist, only CBG data is analyzed in the shared channel, if the first indication domain does not exist, the first indication domain still exists in the shared channel, and the CBG data is required to be received except for resources occupied by the first indication domain, but the terminal is not required to further analyze/read the content of the first indication domain.

Optionally, the first indication field may also be predetermined to be always present or always valid, and the terminal does not need to perform the above-mentioned manner to determine whether the first indication field is present or valid, and always performs processing according to the presence or validity of the first indication field.

While the above describes the steps before the terminal performs step 101, correspondingly, the following describes the steps before the base station performs step 201, that is, before step 201, the method further includes: the base station judges whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid according to at least one of the following manners.

The method comprises the following steps: the base station determines whether the terminal supports CBG-based transmission or not, informs the terminal through high-level signaling, determines that a first indication domain exists or is valid when the terminal determines that the terminal supports CBG-based transmission, and otherwise determines that the first indication domain does not exist or is invalid.

The method 2 comprises the following steps: a third indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the third indication field is used to indicate whether a CBG has the corresponding first indication field or whether the first indication field is valid; and the base station determines whether the first indication domain exists or whether the first indication domain is effective or not, and informs the terminal through the third indication domain.

The method 3 comprises the following steps: the downlink shared channel further comprises a fourth indication domain, and the fourth indication domain is used for indicating whether the CBG has the corresponding first indication domain or whether the first indication domain is valid; and the base station determines whether the first indication domain exists or whether the first indication domain is effective or not, and informs the terminal through the fourth indication domain.

For the way that the base station determines whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid, please refer to the description of the way that the terminal determines whether each CBG in the downlink shared channel has the corresponding first indication domain or whether the first indication domain is valid, which is not described herein for brevity of the specification.

Optionally, the encoding manner may be repeated encoding, simplex encoding (simplex encoding), Reed-Muller (RM, Reed-Muller) encoding, or the like.

Taking downlink data as an example, the first indication field may be transmitted on a resource corresponding to a predetermined CB of at least one CB included in the CBG, for example, transmitted in a predetermined resource corresponding to a first CB or a last CB of the CBG, as shown in fig. 3, where the first indication field is transmitted in a first CB, that is, a CB, of the CBG_1,1Corresponding resources are transmitted, of course, the transmission can also be carried out on the last CB, namely the CB_N1,1And transmitting on the corresponding resource. When determining which CB corresponds to the resource to transmit on, performing puncturing (puncturing) transmission on the CB corresponding to the resource, that is, the CB transmits the data of the CB on the resource corresponding to the CBDuring data transmission, the size of the first indication field is not considered, and during actual mapping, if the first indication field is mapped to the resource corresponding to the data of the CB, the CB data on the part of resources are punctured, that is, the part of CB data is covered. Or the CB is transmitted through rate matching, that is, when the CB is encoded and rate matched, the CB and the first indication field are considered to exist in the resource corresponding to the CB at the same time, so that the CB and the CB are encoded respectively, and the rate matching is performed by considering the encoded information of the CB and the coded information of the CB, that is, the CB data and the first indication field occupy different parts of the resource corresponding to the CB respectively for transmission, and the CB data is not punctured or covered by the first indication field.

In step 101, the bit number of the first indication information is determined based on the number of CBGs in the downlink shared channel. For example, the first indication information may have a bit number of [ log ]₂M]The bit M may be the number of CBGs into which one TB is divided, or may be a fixed value or may vary with the TBs. When M is a fixed value, it may be predetermined or configured, when M changes with TBS, a corresponding relationship between M and TBS may be predefined, and after TBS is determined, a corresponding M value may be determined, so as to determine the bit number of the first indication information.

Step 102: the terminal identifies each CBG according to the first indication information.

For example, one TB is code block-segmented at the time of initial transmission to obtain a CBs, and the a CBs are segmented into 5 CBGs according to a certain rule, so that the terminal receives 5 CBGs, CBG1, CBG2, CBG3, CBG4, and CBG5 in the initial transmission of one TB. Then, the terminal generates feedback information, for example, ACK, NACK, and ACK, for each CBG, and sends the feedback information to the base station, so that the base station determines that CBG2 and CBG4 need to be retransmitted, and retransmits only CBG2 and CBG4 in the next transmission corresponding to the same HARQ process number to improve transmission efficiency, and when the terminal receives the retransmission corresponding to the same HARQ process number, the terminal does not know which of the 5 CBGs into which the two newly received CBGs are divided in the initial transmission of the TB, so that the terminal can identify each CBG according to the first indication information.

One possible implementation manner is that, assuming that the bit number of the first indication information is 3, 5 CBGs can be represented by 000, 001, 010, 011, and 100, respectively, that is, the CBG with the first indication information of "000" is CBG1, the CBG with the first indication information of "001" is CBG2, the CBG with the first indication information of "010" is CBG3, the CBG with the first indication information of "011" is CBG4, and the CBG with the first indication information of "100" is CBG 5. Then if the terminal receives the first indication fields of two CBGs, and the first indication information in the first indication field corresponding to the first CBG is "001", it determines that the CBG is a CBG2 among the 5 CBGs divided in the initial transmission of the TB. If the second CBG corresponds to the first indication information of "011" in the first indication field, it is determined that the CBG is the CBG4 of the 5 CBGs divided in the initial transmission of the TB. In this way, the terminal knows the relation between each CBG received and the CBG received last time, and performs corresponding HARQ combining, that is, combining data received multiple times and corresponding to the same CBG, so as to improve demodulation performance.

Optionally, the first indication field further includes second indication information, where the second indication information is used to indicate whether the previous or previous transmission of the CBG corresponding to the CBG number indicated by the first indication information is corrupted, and/or the second indication information is used to indicate which CBs in the previous or previous transmission of the CBG corresponding to the CBG number indicated by the first indication information are corrupted, where the CBG includes at least one CB, and/or the second indication information is used to indicate which symbols of the previous or previous transmission of the CBG corresponding to the CBG number indicated by the first indication information are corrupted. Referring to fig. 4, a schematic diagram of a first indication field according to an embodiment of the invention is shown, where fig. 4 only illustrates that the first indication field (CBG field) includes first indication information (CBG index) and second indication information (PI).

One possible scenario for data corruption will be illustrated below, for example, by supporting more service types for a 5G NR system, such as Low-Latency high-reliability Communication (URLLC) service and enhanced Mobile Broadband (eMBB) service. The URLLC may transmit on the transmission resource allocated to the eMBB, that is, the transmission resource of the eMBB service is preempted (pre-occupation), at this time, the URLLC service covers the eMBB service in the part overlapping with the eMBB, that is, the eMBB service is punctured (puncuture) in the part overlapping with the URLLC transmission part, so that certain damage may be caused to the downlink reception information of the terminal performing the eMBB service transmission, that is, data is damaged. The terminal performing the eMBB service actually receives the information of the URLLC service at the overlapping portion, and if the terminal performing the eMBB service cannot know whether the downlink information received by the terminal is punctured, the URLLC information at the overlapping portion may be combined with the initial transmission or retransmission information already received by the terminal, which may cause error extension and affect the transmission performance of the eMBB service.

For example, when the second indication information is used to indicate whether the CBG received by the terminal last time is corrupted, the second indication information may be 1 bit, where "1" indicates corrupted, "and" 0 "indicates uncorrupted, or vice versa. When the second indication information indicates which CBs in the CBG of the previous transmission were corrupted, it is necessary to at least

The bit or L bit indicates the number of corrupted CBs, i.e., every 1 bit in the L bit corresponds to one CB in one CBG, e.g., "1" indicates corrupted and "0" indicates uncorrupted, or vice versa, where L is the number of CBs or the maximum number of CBs contained in the previous transmission of one CBG. At least when indicating which symbols in a previous transmission of a CBG were corrupted, it is necessary to at least

The bit indicates the number of a damaged symbol or A bit, and a bitmap mode is adopted to indicate whether each symbol is damaged, namely, each 1 bit in the A bit occupies one symbol of at least 1 symbols occupied by the previous transmission, wherein A is the number of symbols contained in the previous transmission of a CBGNumber or maximum number of transmission symbols. Of course, a combination of the above indication manners may be also possible, for example, indicating which symbols the CBs included in the previous transmission of a CBG are corrupted, and so on.

Optionally, the second indication information may be always present in the indication field, and in order to save space, the second indication information may also be present only when the downlink shared channel is a retransmission channel, that is, when the base station retransmits data to the terminal. Namely, the method further comprises: the terminal determines whether the second indication information exists in the first indication domain or whether the second indication information is valid in at least one of the following manners.

Mode 1: the first indication domain contains third indication information, and the third indication information is used for indicating whether the first indication domain contains the second indication information or whether the second indication information is valid; for example, "1" means inclusive, "0" means exclusive, or vice versa;

optionally, the second indication information is valid, which means that the terminal needs to read the second indication information, and corresponding operation is performed according to specific indication content of the second indication information; the invalid state can be understood as that although the bit number of the second indication information exists, the terminal is not required to read the second indication information, so that what the terminal indicated by the second indication information is can not know, and the terminal can not perform corresponding operation according to the second indication information.

Mode 2: the downlink shared channel includes a second indication field, where the second indication field is used to indicate whether the first indication field has the second indication information or whether the second indication information is valid.

Optionally, each CBG may correspond to a second indication field, that is, the second indication field may independently indicate whether each CBG includes the second indication information or whether the second indication information is valid; for example, a CBG corresponds to 1-bit second indication field information, and when "0" indicates that the CBG does not include the second indication information or the second indication information is invalid, and when "1" indicates that the CBG includes the second indication information or the second indication information is valid. All CBGs may also correspond to the same second indication field, that is, only one second indication field is included in the downlink shared channel, and when all CBGs are valid, for example, 1-bit information is "0", it indicates that all CBGs do not include the second indication information or the second indication information is invalid, and when "1", it indicates that all CBGs include the second indication information or the second indication information is valid.

Mode 3: and a fifth indication field with at least 1 bit exists in a downlink control channel used for scheduling the downlink shared channel, where the fifth indication field is used to indicate whether the second indication information exists in the first indication field or whether the second indication information is valid. The fifth indication field here is similar to the second indication field described earlier.

Specifically, whether the downlink shared channel is a retransmission or not may be determined by an indication field in a downlink control channel used for scheduling the downlink shared channel, for example, an HARQ process number indicated in the downlink control channel is the same as a process number corresponding to a previously received data packet, and an indication in the downlink control channel is a retransmission (for example, a retransmission is determined according to NDI, or determined according to an indication field indicating whether a CBG is retransmitted or not included in the downlink control channel, and if there is a CBG in a retransmission state, it indicates that a retransmission is scheduled); whether retransmission is required or not may be determined according to different DCI formats used for scheduling the downlink control channel of the downlink shared channel (for example, the number of bits is different, or which format the indication field indicates in DCI) and/or different used RNTIs, for example, DCI format 1 is used for scheduling initial transmission, DCI format 2 is used for scheduling retransmission, DCI sizes of DCI formats 1 and 2 are different, or RNTI1 is used for scheduling initial transmission, RNTI2 is used for scheduling retransmission, or the like, which may be a combination of the two.

The terminal firstly judges whether the first indication domain contains the second indication information or whether the second indication information is valid or not according to the modes 1-4, and further analyzes/reads the second indication information when the first indication domain contains or is valid, otherwise, if the first indication domain does not contain the second indication information, the first indication domain only contains the first indication information, and if the first indication domain is invalid, the first indication domain also contains the second indication information, namely the first indication domain always contains the first indication information and the second indication information, but the terminal is not required to further analyze/read the second indication information.

Optionally, the second indication information may also be predetermined to be always present or always valid, that is, the first indication field always includes the second indication information or the second indication information is always valid, the terminal does not need to perform the above-mentioned manner to determine whether the first indication field includes the second indication information or the second indication information is valid, and always performs processing according to whether the first indication field always includes the second indication information or the second indication information is valid.

Correspondingly, how the base station determines whether the second indication information exists in the first indication domain or whether the second indication information is valid is described below, specifically as follows: the base station determines whether the second indication information exists in the first indication field or whether the second indication information is valid in at least one of the following manners.

Mode 1: the first indication domain contains third indication information, and the third indication information is used for indicating whether the first indication domain contains the second indication information or whether the second indication information is valid; and the base station determines whether the second indication information exists in the first indication domain or whether the second indication information is valid or not, and indicates the second indication information to the terminal through the third indication information.

Mode 2: the downlink shared channel further comprises a second indication domain, and the second indication domain is used for indicating whether the first indication domain has the second indication information or whether the second indication information is valid; and the base station determines whether the second indication information exists in the first indication domain or whether the second indication information is valid or not, and indicates the second indication domain to the terminal.

For the way that the base station determines whether the second indication information or the second indication information is valid in the first indication domain, please refer to the description of the way that the terminal determines whether the second indication information or the second indication information is valid in the first indication domain, which is not described herein for brevity of the description.

Optionally, the third indication information is encoded independently from the first indication information or the second indication information in the first indication domain;

optionally, the second indication field is encoded independently from the first indication field.

Optionally, if the terminal determines, according to the second indication information, that the previous or previous transmission of the CBG corresponding to the second indication information (the CBG corresponding to the first indication field including the second indication information) corresponding to the CBG number included in the first indication field is damaged, the terminal removes the stored data damaged in the previous or previous transmission of the CBG, or covers the damaged data in the previous or previous transmission of the CBG with the corresponding data in the CBG received through the downlink shared channel. The CBG corresponding to the second indication information includes the first indication field, that is, the first indication field in which the second indication information is located, or the first indication field including the second indication information.

If the data is damaged, the terminal does not combine the damaged data corresponding to the CBG received for the previous time or the previous times with the data corresponding to the CBG received for the current time; that is, the terminal may clear/release the corresponding corrupted data in the previous or several previous receptions of the CBG in the memory (buffer), or replace/overwrite the corresponding corrupted data in the previous or several previous receptions of the CBG with the corresponding data in the currently received CBG. Wherein, if the second indication information indicates whether the CBG level is damaged, the terminal does not perform HARQ combining on the damaged CBG received in the previous or previous transmission and the corresponding CBG received this time (for example, the terminal releases or removes the damaged CBG in the last transmission in the buffer, or covers the information of the CBG in the previous transmission stored in the buffer for the CBG received this time), if the second indication information indicates that the CB level is damaged, the terminal does not perform HARQ combining on the damaged CB received in the previous or previous transmission of the CBG and the corresponding CB of the CBG received this time (for example, the terminal releases or removes the damaged CB in the last transmission in the buffer, or covers the information of the CB in the previous transmission stored in the buffer for the current time), if the second indication information indicates that the symbol level is damaged, the terminal does not perform HARQ combining on the data on the damaged symbol received in the previous or several previous transmissions of the CBG and the data on the corresponding symbol of the CBG received this time (for example, the terminal releases or removes the data on the damaged symbol in the previous transmission in the buffer, or covers the data on the symbol received this time on the information on the symbol in the corresponding previous transmission stored in the buffer).

The whole process of the data transmission method provided by the present invention will be described below by way of example.

For example, assume that one TB is subjected to code block segmentation to obtain 5 CBGs, each of which includes 4 CBs, CBG1, CBG2, CBG3, CBG4, and CBG 5; a terminal receives a downlink control channel scheduling TB1 in a time slot 1 to perform initial transmission in a shared channel transmission, wherein the HARQ process number indicated in the downlink control channel is 0, namely the HARQ process number corresponding to the TB1 is 0;

one possible implementation: the terminal may always assume that each CBG of TB1 includes the first indication field, and then in slot 1, the terminal determines the number of CBs after the code block segmentation, i.e. 20, according to the TBs of the scheduled TB1, then performs CBG grouping in a manner that each CBG includes 4 CBs to obtain 5 CBGs, and receives the first indication field on the corresponding resource in each CBG, and then the first indication information in the first indication field of each CBG is 3 bits, which indicates that the number of the CBG is from 0 to 4, or from 1 to 5; if it is assumed that the second indication information is always included in the first indication field, the second indication information indicates a state where the data is not destroyed because it is the first transmission. The terminal generates feedback information, such as ACK, NACK, ACK, NACK and ACK, for each received CBG and sends the feedback information to the base station; when the base station correctly receives the feedback information, and determines that the CBG2 and the CBG4 in the initial transmission of the TB1 need to be retransmitted, the base station sends downlink control channel scheduling to the terminal to retransmit the CBG2 and the CBG 4.

Another possible implementation: the terminal determines that the transmission is the initial transmission according to the indication domain in the downlink control channel which schedules the TB1 transmission in the time slot 1, and then judges that each CBG does not contain the first indication domain; however, since the terminal knows the size of the initial transmission of TB1, the CBG partition and CBG number at the time of the initial transmission of TB1 can be determined for retransmission for corresponding combining.

Another possible implementation: the terminal determines whether the first indication field is included in the retransmission CBG of the TB1 according to the third indication field in the downlink control channel for which transmission of the TB1 is scheduled in slot 1, and preferably, in the initial transmission, it may indicate that the first indication field is not included, for example, the third indication field is set to "0".

Suppose that the terminal receives a downlink control channel in slot 3 to schedule the TB1 for retransmission on a shared channel, and the HARQ process number indicated in the downlink control channel is 0, that is, the HARQ process number corresponding to the TB1, and determines that the terminal is retransmission of TB1 according to the NDI or determines that the terminal is retransmission according to the DCI size or RNTI, or determines that the terminal is retransmission if an indication field exists in the downlink control channel to indicate that at least one CBG is retransmission.

One possible implementation: the terminal always assumes that each CBG of the TB1 includes the first indication field, determines the number of CBs after the code block segmentation according to the TBs retransmitted by the scheduled TB1 in slot 3, then performs CBG grouping in a manner that each CBG includes 4 CBs, obtains 2 CBGs, receives the first indication field on the corresponding resource in each CBG, and assumes that the first indication field includes the first indication information, the first indication information in the first indication field corresponding to the first CBG (which is the retransmission of the CBG2 in the initial transmission of the TB 1) is "001", which indicates that the corresponding CBG is the CBG2 in the initial transmission of the TB1, and the first indication information in the first indication field corresponding to the second CBG (which is the retransmission of the CBG4 in the initial transmission of the TB 1) is "011", which indicates that the corresponding CBG is the CBG4 in the initial transmission of the TB 1. That is, the terminal identifies each CBG through the first indication field, so that the terminal and the base station understand identically for each retransmitted CBG.

If the first indication field contains the second indication information, the second indication information may indicate according to whether the data of CBG2 and CBG4 in the initial transmission of TB1 is corrupted; assuming that the data indicating the CBG2 is corrupted, i.e. the second indication information in the first indication field corresponding to the first CBG in the retransmission is indicated as "1", indicating corruption, and assuming that the data indicating the CBG4 is not corrupted, i.e. the second indication information in the first indication field corresponding to the second CBG in the retransmission is indicated as "0", indicating corruption is not reached, the terminal does not combine the information of the first CBG received in the shared channel in slot 3 (i.e. the retransmitted CBG2) with the information of the CBG2 stored in the buffer received in the initial transmission in slot 1, avoiding the effect of corrupted data on the retransmitted data, the terminal can also clear the information of the CBG2 stored in the buffer received in the initial transmission in slot 1, release this part of the buffer, the terminal combines the information of the second CBG received in the shared channel in slot 3 (i.e. the CBG4) with the information of the CBG4 received in the initial transmission in slot 1, and the terminal releases this part of the buffer The information is combined to improve demodulation performance. It is needless to say that the second indication information may be determined to be included by determining that the retransmission is the retransmission, or whether the second indication information is included may be determined according to the third indication information in the first indication field, preferably, the second indication information may be included by the third indication information in the retransmission, for example, the third indication information is set to "1", or, whether the second indication information is included in the first indication field corresponding to each CBG in the shared channel may be determined according to the indication of the second indication field in the downlink control channel scheduling the retransmission of TB1, preferably, the second indication field may be set to indicate that the second indication information is included in the retransmission, for example, the second indication field is set to "1".

Another possible implementation: the terminal determines that the transmission is retransmission according to the indication domain in the downlink control channel for scheduling retransmission of the TB1 in the time slot 3, and then judges that the retransmission CBG of the TB1 contains the first indication domain; determining the retransmitted CBG number and whether the data is corrupted in a similar manner as described above;

another possible implementation: the terminal determines whether the first indication field is included in the retransmission CBG of the TB1 according to the third indication field in the downlink control channel for scheduling retransmission of the TB1 in slot 3, preferably, in the retransmission, the indication includes, for example, setting the third indication field to "1".

As can be seen from the above description, in the technical solution provided in the embodiment of the present invention, a terminal acquires a first indication field corresponding to each CBG in a downlink shared channel; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG; and the terminal identifies each CBG according to the first indication information. Namely, the base station and the terminal perform data retransmission and ACK/NACK feedback in CBG units, and a CBG usually includes at least one CB, so that one TB can be divided into at least one CBG. And, each CBG has a number in the present invention, so that the base station and the terminal have a consistent understanding of each retransmitted CBG.

The second aspect of the present invention provides a terminal, which may be a terminal in a wireless communication system such as an LTE system, an NR system, etc., for example, a mobile phone, a tablet computer, etc. Fig. 5 is a block diagram of a terminal according to an embodiment of the present invention. As shown in fig. 5, the terminal includes:

an obtaining unit 501, configured to obtain at least one CBG in a downlink shared channel and a first indication field corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

a processing unit 502, configured to identify each CBG according to the first indication information.

Optionally, the processing unit 502 is further configured to:

Optionally, when the terminal determines, according to the second indication information, that the previous transmission or previous transmissions of the CBG corresponding to the CBG number indicated by the CBG number in the first indication field included in the CBG corresponding to the second indication information is damaged, the processing unit 502 is further configured to:

Since the terminal provided by the second aspect of the present invention is proposed under the same conception as the data transmission method provided by the first aspect of the present invention, various variations and specific embodiments of the data transmission method in the foregoing embodiments of fig. 1 to 4 are also applicable to the terminal of this embodiment, and a person skilled in the art can clearly know implementation procedures of the terminal in this embodiment through the foregoing detailed description of the data transmission method, so that details are not described here for the sake of brevity of the description.

A third aspect of the present invention provides a base station, please refer to fig. 6, which is a structural diagram of a base station according to an embodiment of the present invention, including:

a processing unit 601, configured to generate at least one CBG and a first indication field corresponding to each CBG in the at least one CBG; the first indication field contains first indication information, and the first indication information is used for indicating the number of each CBG;

a sending unit 602, configured to send the at least one CBG and the first indication field in a downlink shared channel.

Optionally, the processing unit 601 is further configured to:

Since the network device provided in the third aspect of the present invention is proposed under the same conception as the data transmission method provided in the first aspect of the present invention, various variations and specific embodiments of the data transmission method in the foregoing embodiments of fig. 1 to 4 are also applicable to the network device of this embodiment, and a person skilled in the art can clearly know the implementation process of the network device in this embodiment through the foregoing detailed description of the data transmission method, so that the detailed description is omitted here for the sake of brevity of the description.

A fourth aspect of the present invention provides a computer apparatus, please refer to fig. 7, where the computer apparatus includes a processor 701, and the processor 701 is configured to implement the steps of the data transmission method according to the first aspect of the present invention when executing the computer program stored in the memory.

Optionally, the processor 701 may specifically be a central processing unit, an Application Specific Integrated Circuit (ASIC), one or more Integrated circuits for controlling program execution, a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), or a baseband processor.

Optionally, processor 701 may include at least one processing core.

Optionally, the electronic device further includes a Memory, where the Memory may include a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. The memories are used to store data that is needed by the processor 701 during operation. The number of the memories is one or more.

A sixth aspect of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the data transmission method as provided in the first aspect of the invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of data transmission, comprising:

the terminal identifies each CBG according to the first indication information; the first indication field is independently coded with a CB in a CBG corresponding to the first indication field.

2. The method of claim 1, wherein a number of bits of the first indication information is determined based on a number of CBGs in the downlink shared channel.

3. The method as claimed in claim 1, wherein the first indication field further contains second indication information, and the second indication information is used to indicate whether previous or previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information are corrupted, and/or whether the previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information are corrupted

4. The method of claim 3, wherein the number of bits of the second indication information is determined according to the indication content of the second indication information.

5. The method of claim 3, wherein the method further comprises:

6. The method of claim 5, wherein the third indication information is encoded independently of the first indication information or the second indication information in the first indication field; the second indication field is encoded independently of the first indication field.

7. The method of claim 1, wherein before the terminal acquires the first indication field corresponding to each CBG in the downlink shared channel, the method further comprises:

8. The method of claim 7, wherein the fourth indication field is encoded independently of the first indication field.

9. The method of any one of claims 1-7, wherein the first indication field for each CBG is transmitted in punctured or rate matched manner in the predefined resources for the CBG.

10. The method of claim 3, wherein when the terminal determines from the second indication information that the previous or previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information in the first indication field included in the CBG corresponding to the second indication information are corrupted, the method further comprises:

11. A method of data transmission, comprising:

the base station sends the at least one CBG and the first indication domain in a downlink shared channel; the first indication field is independently coded with a CB in a CBG corresponding to the first indication field.

12. The method of claim 11, wherein a number of bits of the first indication information is determined based on a number of CBGs in the downlink shared channel.

13. The method as claimed in claim 11, wherein the first indication field further contains second indication information, and the second indication information is used to indicate whether previous or previous transmissions of CBGs corresponding to CBG numbers indicated by the first indication information are corrupted, and/or whether previous transmissions of CBGs corresponding to CBG numbers indicated by the first indication information are corrupted

14. The method of claim 13, wherein the number of bits of the second indication information is determined according to indication contents of the second indication information.

15. The method of claim 13, wherein the method further comprises:

16. The method of claim 15, wherein the third indication information is encoded independently of the first indication information or the second indication information in the first indication field; the second indication field is encoded independently of the first indication field.

17. The method of claim 11, wherein prior to the base station generating the first indication field for each CBG, the method further comprises:

the method 4 comprises the following steps: and when the downlink shared channel is judged to be retransmission, determining that the first indication domain exists in the CBG or the first indication domain is valid, otherwise, determining that the first indication domain does not exist in the CBG or the first indication domain is invalid.

18. The method of claim 17, wherein the fourth indication field is encoded independently of the first indication field.

19. The method of any one of claims 11-17, wherein the first indication field for each CBG is transmitted in punctured or rate matched manner in the predefined resources for the CBG.

20. A terminal, comprising

a processing unit, configured to identify each CBG according to the first indication information; the first indication field is independently coded with a CB in a CBG corresponding to the first indication field.

21. The terminal of claim 20, wherein a bit number of the first indication information is determined based on a number of CBGs in the downlink shared channel.

22. The terminal of claim 20, wherein the first indication field further includes second indication information, and the second indication information is used to indicate whether previous or previous transmissions of CBGs corresponding to CBG numbers indicated by the first indication information are corrupted, and/or indicate whether previous transmissions of CBGs corresponding to CBG numbers indicated by the first indication information are corrupted

23. The terminal according to claim 22, wherein the number of bits of the second indication information is determined according to the indication content of the second indication information.

24. The terminal of claim 22, wherein the processing unit is further configured to:

25. The terminal of claim 24, wherein the third indication information is encoded independently of the first indication information or the second indication information in the first indication field; the second indication field is encoded independently of the first indication field.

26. The terminal of claim 20, wherein the processing unit is further configured to:

27. The terminal of claim 26, wherein the fourth indication field is encoded independently of the first indication field.

28. The terminal of any one of claims 20-26, wherein the first indication field for each CBG is transmitted in punctured or rate matched manner in the predefined resources for the CBG.

29. The terminal of claim 22, wherein when the terminal determines, according to the second indication information, that the previous or previous transmissions of the CBG corresponding to the CBG number indicated by the first indication information in the first indication field included in the CBG corresponding to the second indication information are corrupted, the processing unit is further configured to:

30. A base station, comprising:

a sending unit, configured to send the at least one CBG and the first indication field in a downlink shared channel; the first indication field is independently coded with a CB in a CBG corresponding to the first indication field.

31. The base station of claim 30, wherein a number of bits of the first indication information is determined based on a number of CBGs in the downlink shared channel.

32. The base station of claim 30, wherein the first indication field further comprises second indication information, and the second indication information is used to indicate whether previous or previous transmissions of CBGs corresponding to CBG numbers indicated by the first indication information are corrupted, and/or whether previous transmissions of CBGs corresponding to CBG numbers indicated by the first indication information are corrupted

33. The base station of claim 32, wherein the number of bits of the second indication information is determined according to the indication content of the second indication information.

34. The base station of claim 32, wherein the processing unit is further configured to:

35. The base station of claim 34, wherein the third indication information is encoded independently of the first indication information or the second indication information in the first indication field; the second indication field is encoded independently of the first indication field.

36. The base station of claim 30, wherein the processing unit is further configured to:

37. The base station of claim 36, wherein the fourth indication field is encoded independently of the first indication field.

38. The base station of any one of claims 30 to 36, wherein the first indication field for each CBG is transmitted in punctured or rate matched manner in the predefined resources for the CBG.

39. A computer arrangement, characterized in that the arrangement comprises a processor for implementing the steps of the method according to any one of claims 1-10 or 11-19 when executing a computer program stored in a memory.

40. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program when executed by a processor implementing the steps of the method according to any one of claims 1-10 or 11-19.