CN116015578A

CN116015578A - Data transmission instruction, data transmission method, base station, terminal and storage medium

Info

Publication number: CN116015578A
Application number: CN202210713614.9A
Authority: CN
Inventors: 柯颋
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2017-06-16
Filing date: 2017-06-16
Publication date: 2023-04-25
Also published as: CN109152071A; CN109152071B

Abstract

The embodiment of the invention discloses a data transmission indication and a data transmission method, a base station, a terminal and a storage medium, wherein the data transmission indication method applied to the base station comprises the following steps: transmitting DCI comprising state indication bits of N CBGs to a terminal; the N is greater than or equal to 1; wherein one status indication bit is combined with the second information to indicate a transmission status of one CBG; the second information includes domain indication bits in the DCI and/or indication information of a new transmission or retransmission of data in the DCI; the CBG comprises a plurality of CBs for data transmission; the transmission state includes: and a retransmission state for retransmitting the data, a new transmission state for new transmission of the data, and an empty transmission state not used for data transmission.

Description

Data transmission instruction, data transmission method, base station, terminal and storage medium

The application is a divisional application with the application date of 2017, 06, 16 days, the patent application number of 201710458358.2 and the name of data transmission indication and data transmission method, base station, terminal and storage medium.

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a data transmission instruction and a data transmission method, a base station, a terminal, and a storage medium.

Background

In wireless communication, one Transport Block (TB) includes a plurality of Code Blocks (CBs).

In long term evolution (Long Term Evolution, LTE), if a decoding error occurs in one of the TBs, the entire TB is instructed to retransmit.

However, in the New air interface (NR) system of 5G, a hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) mechanism is introduced, the terminal needs to indicate that the transmission is successful through an acknowledgement (Acknowledgement Character, ACK) and indicate that the transmission is failed with a non-acknowledgement (Non Acknowledgement Character, NACK).

In order to reduce retransmission data, the terminal also called User Equipment (UE) feeds back data of a TB Block Group (CBG).

However, how to determine whether the data transmitted on one CBG is retransmission, new transmission or null transmission without carrying data when the terminal receives downlink data is an unresolved problem in the prior art.

Before downlink transmission, whether the corresponding CBG is retransmission, new transmission or null transmission without carrying data is required to be indicated, so how to indicate the transmission state of the CBG, and how to indicate the overhead of the state indication bit which can be reduced as much as possible is a problem to be solved in the prior art.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a data transmission indicator, a data transmission method, a base station, a terminal and a storage medium, so as to solve the problem of high signaling overhead.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

a first aspect of an embodiment of the present invention provides a data transmission indication method, which is applied to a base station, and includes:

transmitting downlink control information (Downlink Control Information, DCI) including status indication bits of N CBGs to a terminal; the N is greater than or equal to 1; wherein, the liquid crystal display device comprises a liquid crystal display device,

a status indication bit in combination with the second information for indicating a transmission status of a CBG; the second information includes domain indication bits in the DCI and/or indication information of a new transmission or retransmission of data in the DCI;

the CBG comprises a plurality of CBs for data transmission;

the transmission state includes: and a retransmission state for retransmitting the data, a new transmission state for new transmission of the data, and an empty transmission state not used for data transmission.

A second aspect of an embodiment of the present invention provides a data transmission indication method, which is applied to a base station, and includes:

transmitting DCI comprising state indication bits of N CBGs to a terminal, wherein the DCI is used for indicating the terminal to determine the transmission state of one CBG according to one state indication bit or according to one state indication bit and second information; wherein, the liquid crystal display device comprises a liquid crystal display device,

The N is greater than or equal to 1; the second information includes domain indication bits in the DCI and/or indication information of a new transmission or retransmission of data in the DCI;

the CBG comprises a plurality of CBs for data transmission;

A third aspect of the embodiment of the present invention provides a data transmission method, applied to a terminal, including:

receiving DCI which is sent by a base station and comprises N state indication bits of CBG; the N is greater than or equal to 1; wherein, the liquid crystal display device comprises a liquid crystal display device,

determining a transmission state of a CBG according to a state indication bit or according to a state indication bit and second information;

the second information includes domain indication bits in the DCI and/or indication information of a new transmission or retransmission of data in the DCI;

the CBG comprises a plurality of CBs for data transmission;

A fourth aspect of the present invention provides a data transmission method, applied to a terminal, including:

the CBG comprises a plurality of CBs for data transmission;

A fifth aspect of an embodiment of the present invention provides a communication device, including:

the first transceiver is used for carrying out information interaction with other communication equipment;

and the first processor is connected with the first transceiver and is used for realizing the data transmission indication method or the data transmission indication confirmation method provided by any one or more of the technical schemes through executing the computer program.

A sixth aspect of an embodiment of the present invention provides a communication device, including: a second processor and a computer program;

the second processor is configured to implement the data transmission indication method or the data transmission indication confirmation method provided by any one or more of the foregoing technical solutions by executing the computer program.

A seventh aspect of the embodiments of the present invention provides a computer storage medium, where a computer program is stored, where the computer program can implement the data transmission instruction method or the data transmission instruction acknowledgement method provided by any one or more of the foregoing technical solutions after being executed by a processor.

The data transmission indication and data transmission method, the base station, the terminal and the storage medium provided by the embodiment of the invention, wherein the base station sends DCI (downlink control information) comprising N CBG (cubic boron nitride) status indication bits to the terminal; the N is greater than or equal to 1; the CBG comprises a plurality of CBs for data transmission; the transmission state includes: and a retransmission state for retransmitting the data, a new transmission state for new transmission of the data, and an empty transmission state not used for data transmission. Wherein, a status indication bit is combined with the second information to indicate the transmission status of a CBG, or the terminal determines the transmission status of a CBG according to a status indication bit, or according to a status indication bit and the second information. Here, the second information includes a domain indication bit in the DCI and/or indication information of a case of data new transmission or data retransmission in the DCI. In the embodiment of the invention, one state indication bit is used for three states of three transmission states, and the method has the characteristic of low resource expense.

Drawings

Fig. 1 is a flowchart of a first data transmission indicating method according to an embodiment of the present invention;

fig. 2 is a flowchart of a second method for indicating data transmission according to an embodiment of the present invention;

fig. 3 is a flowchart of a first data transmission method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

fig. 5A is a schematic diagram of a first CGB transmission instruction list according to an embodiment of the present invention;

fig. 5B is a schematic diagram of a second CGB transmission instruction list according to an embodiment of the present invention;

fig. 6 is a schematic diagram of comparison of CGB transmission indication lists of two transmission modes according to an embodiment of the present invention;

fig. 7 is a schematic diagram of comparison of CGB transmission indication lists of two transmission modes according to an embodiment of the present invention;

fig. 8 is a flowchart of a second output transmission method according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further elaborated below by referring to the drawings in the specification and the specific embodiments.

As shown in fig. 1, this embodiment provides a data transmission indication method, which is applied to a base station, and includes:

transmitting DCI comprising a CBG transmission indication list to a terminal;

Wherein the CBG transmission indication list includes: 1 or more status indication bits;

1 status indication bit for indicating a transmission status of one CBG;

the CBG includes: a plurality of CBs for data transmission;

The data transmission indication method in this embodiment is a method applied to a base station. The base station may be a next generation base station (gNB) or the like.

The DCI may be DCI related to downlink grant, for example, DCI scheduling downlink transmission.

The DCI in this embodiment includes a CBG transmission indication list. The CBG transmission list includes one or more status indication bits, one for indicating a transmission status of one CBG.

The transmission states can be classified into at least three types in this embodiment. The three transmission states are retransmission states for retransmitting data, and are new transmission states for transmitting data to a specific terminal for the first time by the base station, and if no data is transmitted on one CBG, the transmission states can be regarded as null transmission states.

In this embodiment, by carrying the CBG transmission indication list in the DCI, the terminal can simply know whether the downlink data received at the current moment or the downlink data received at the next moment is retransmission data or new transmission data, or whether the transmission state of the corresponding CBG can be an air transmission state, and the analysis and decoding of the data are not needed; obviously has the characteristics of realization.

In this way, the status indication bit includes only 1 bit in the present embodiment, and the status indication bit is used to indicate the transmission status of the CBG, which may be referred to as a status indication bit. The 1 state indication bits include 1 bit, the 1 bit may include two values, namely "0" and "1", where one value is used to specifically indicate the retransmission state, and the other value may be used to indicate other states than the retransmission state, and in this embodiment, the states other than the retransmission may include: the new transmission state and the idle transmission state are described above. In this embodiment, the method for indicating the transmission of the credit data may determine which CBGs are retransmission CBGs for retransmitting data according to the status indication bits in the CBG transmission indication list, and which CBGs are new transmission CBGs for transmitting data for the first time or null transmission CBGs without data. Namely, the retransmission state refers to the corresponding indicated CBG bearing retransmission data; the new transmission state refers to that the CBG corresponding to the indication bears new transmission data; the null transmission state refers to that the CBG indicated by the corresponding CBG does not carry any information.

When one value of the 1 state indication bits is used for indicating new transmission and null transmission, the terminal receives the CBG transmission indication list, and if the state indication bits for indicating null transmission and new transmission are detected from the CBG transmission indication list, the terminal can determine whether the corresponding CBG is the null transmission CBG or the new transmission CBG through trial analysis of the corresponding CBG. In this embodiment, the air transmission CBG and the new transmission CBG may carry a bit specifically indicating that the current CBG is an air transmission or a new transmission, and the terminal may extract the bit to know whether to continue parsing. For example, the bit may be the first bit of the CBG. In some embodiments, the corresponding CBG may not carry a status indication bit, and the terminal may try to parse one or more transmission symbols of the corresponding CBG to determine whether to continue parsing.

In summary, in the data transmission indication manner provided in this embodiment, only 1 bit is used to indicate the transmission state of the corresponding CBG, so that the base station is convenient to retransmit in the CBG retransmission unit. In this embodiment, the retransmission of the data is based on the automatic hybrid request retransmission mechanism, or may be based on the automatic request retransmission mechanism alone.

If the data transmission indication method provided by the embodiment is adopted to perform data transmission indication, the method has the characteristic of small state indication bit overhead.

Optionally, if the status indication bit is a first value, the status indication bit is used for indicating that the corresponding code block group is used for retransmission; if the status indication bit is a second value, the status indication bit is used for indicating that the corresponding code block group is used for new transmission or null transmission; the first value is different from the second value.

In some embodiments, the state indication bit is "0" to indicate a new transmission state, and "1" to indicate an idle transmission state; alternatively, the state indication bit of "1" indicates a null transmission state, and "0" indicates a new transmission state. That is, if the first value is "0", the second value is "1", and if the first value is "1", the second value is "0".

In some embodiments, within the DCI, further comprising: a domain indication bit;

one of the field indication bits for indicating a transmission mode of a plurality of code block groups included in one transport block TB; the transmission modes include a first mode and a second mode;

if the transmission mode is the first mode, the state indication bit with the second value is used for indicating that the transmission state of the corresponding code block group is a new transmission state;

and if the transmission mode is the second mode, the state indication bit with the second value is used for indicating that the corresponding code block group is used for the null transmission state.

In this embodiment, the DCI further carries a domain indication bit, where the domain indication bit is used to uniformly indicate whether the second values of the CBGs in one TB are used to indicate a new transmission state or an idle transmission state.

1 of the TBs may include a 1-bit field indication bit. For example, if the domain indication bit is "0", the state indication bit is the second value, and the transmission state of the indicated corresponding CBG is the new transmission state. If the domain indication bit is "1", the transmission state of the indicated corresponding CBG is a null transmission state when the state indication bit is the second value.

For another example, if the domain indication bit is "1", the state indication bit is the second value, and the transmission state of the indicated corresponding CBG is the new transmission state. If the domain indication bit is "0", the state indication bit is a second value, and the indicated transmission state of the corresponding CBG is a null transmission state.

In this embodiment, 1 domain indication bit is used to indicate an indication mode corresponding to the second value of the plurality of state indication bits, and compared with the bit of each state indication bit corresponding to the indication mode, the indication bit is obviously saved, and the overhead is reduced. For example, if one TB includes 4 CBGs, if the 4 CBGs correspond to 4 status indication bits, if each CBG needs to correspond to 1 bit of the indication mode again, at least 3 bits of the indication mode may be saved by adopting the method provided in this embodiment. That is, if one TB includes N CBGs, only one field indication bit is used to indicate a mode corresponding to the status indication bit, and one indication bit for indicating the mode is allocated to each status indication bit, N-1 indication bits can be saved, and it is apparent that when one TB includes more CBGs or the number of TBs is greater, a large number of bits can be saved, and thus, the overhead can be greatly saved.

Optionally, the method further comprises:

configuring the length TBS of one TB according to the number of retransmission CBG used for retransmission in the TB;

if the difference value between the TBS and the bit number included in the retransmission CBG is not greater than a preset value, the transmission mode of the TB is a first mode, otherwise, the transmission mode of the TB is a second mode; or the difference value between the TBS and the bit number included in the retransmission CBG is not greater than a preset value, the transmission mode of the TB is the second mode, otherwise, the transmission mode of the TB is the first mode;

if the transmission mode is the first mode, and if the status indication bit is the second value, the status indication bit is used for indicating that the transmission status of the corresponding code block group is a new transmission status;

and if the transmission mode is the second mode, and if the state indication bit is the second value, the state indication bit is used for indicating that the corresponding code block group is used for the null transmission state.

In this embodiment, the length of the TB is variable, and the base station may indicate the mode of the status indication bit by using the domain indication bit, and in this embodiment, the base station may also implicitly indicate the mode of the status indication bit to the terminal.

For example, one TB includes the number of retransmission TBGs and non-retransmission CBGs, where the non-retransmission CBGs may include: air-borne CBG and/or new-borne CBG. And if the TBS comprises a difference value of the bit number of the retransmission CBG subtracted by the bit number of the TBS, determining the transmission mode of the TB as the first mode or the second mode according to the comparison between the difference value and a preset value. In this embodiment, if the transmission mode is the first mode, the status indication bit is a second value for indicating a new transmission status. And if the transmission mode is in the second state, the transmission mode is in the idle transmission state.

In some embodiments, the new and retransmitted data may not be mixed for retransmission. Then the indication of DCI is used in some cases to indicate a new transmission and in other cases to indicate a retransmission.

If the DCI indicates that the data is newly transmitted, and if the status indication bit is the second value, the state indication bit is used to indicate that the transmission status of the corresponding CBG is a new transmission status;

and if the DCI indicates data retransmission and the status indication bit is the second value, the DCI is used for indicating that the corresponding code block group is used for null transmission status.

For example, the first data transmission performed by the base station and the UE is obviously a new data transmission, and the state indication bit indicates the new transmission state.

In some embodiments, it is known that the CBG number is included in a preset transmission period such as a time slot or a micro time slot, and the number of bits indicating a preset transmission period included in the CBG transmission indication list is also acquired by the ue based on decoding. If the number of bits included in the current CBG transmission indication list is found to be exactly equal to the number of CGBs, the data can be considered to be newly transmitted, and when the corresponding status indication bit is the second value, the new transmission status is indicated. If the bit number of the CBG transmission indication list indicating a preset transmission period is greater than the CBG number included in the preset transmission period, the data retransmission can be considered, and when the current state indication bit is the second value, the indication is the null transmission state.

Optionally, the method further comprises:

and sending a system message carrying indication information or Radio Resource Control (RRC) signaling to the terminal, wherein the indication information is used for indicating the length of the CBG transmission indication list.

In this embodiment, in order to enable the terminal to more simply analyze the CBG transmission indication bit, the base station in this embodiment also informs the length of the CBG transmission indication bit corresponding to the terminal through RRC signaling, so that the terminal can know the analysis length when analyzing the CBG transmission indication bit. If the DCI carrying the CBG transmission indication bit is subjected to blind detection, the CBG transmission indication bit can be analyzed by using a blind detection sequence with a corresponding length.

The length of the CBG transmission indication list is at least the bit number of indication bits included in the CBG transmission indication list, and the indication bits at least include: status indication bits, at least bits herein in some embodiments include: status indication bits and field indication bits.

Optionally, as shown in fig. 2, the method further includes:

step S101: calculating a new transmission CB number for new transmission according to the length of the transmission block TBS and the bit number contained in all retransmission CBGs for retransmission;

Step S102: calculating the number of new CBGs based on the retransmission CBG number and the length of the CBG transmission indication list;

step S103: and calculating the CB number included by each CBG based on the new CB number.

In this embodiment, the number of CBs included in one TB is variable, and the number of CBs included in one CBG is also variable. In this embodiment, CBs in the TB are first preferentially allocated to the retransmission CBG and reassigned to the new retransmission CBG. The number of status indication bits allocated for each TB also needs to be considered in determining the number of CBGs.

In this embodiment, the TBs of the TB is first subtracted by the number of bits in the CBG for retransmission, and then the remaining number of bits is grouped into CBs, where the new number of CBs is the new number of CBs available for new data transmission. In this embodiment, if the number of CBGs to be retransmitted is n1 and the length of the CBG transmission indication list corresponding to one TB is n0, n0-n1 is the number of status bits that can be used to indicate a new CBG to be retransmitted. In this embodiment, the number of new CBs may be first dispersed into n0-n1 new CBGs.

In one embodiment, the number of new CBs may be evenly dispersed into n0-n1 new CBGs, where when the number of new CBs may not be evenly distributed, the number of new CBs included in n0-n1-1 new CBGs may be made equal, and the remaining number of CBs belongs to the remaining one new CBG, where the number of new CBs included in the new CBG is different from the number of new CBs included in other n0-n1-1 new CBGs. The other new CBG except the n0-n1-1 new CBGs can be the first new CBG in the TB or the last new CBG.

The step S103 may use at least one of the following formulas to determine the number of CBs included in a CBG:

wherein the { #CB }, is _{New transfer CBG_k} A CB number included in a kth new transmission CBG in one transmission block TB; the A is the new transmission CB number; and M is the new CBG number.

In another embodiment, the number of CBs in the new transmission may be distributed as evenly as possible among n0-n1 CBGs in the new transmission, and it is ensured that the difference in the number of CBs contained in different CBGs may be only 0 or 1.

In general, there are various ways to calculate the number of new CBs included in each new CBG in one TB, and the method is not limited to the above method.

In this embodiment, another method for calculating the number of new transmission CBs included in each new transmission CBG is also provided, and the method has the characteristic of simple calculation.

Optionally, the number of the retransmission CBGs is equal to the number of CBGs needing to be retransmitted, and the number of CBs included in each retransmission CBG is equal to the number of CBs included in the CBG of the last transmission corresponding to the retransmission CBG.

In some embodiments, the number of retransmission CBGs is equal to the last transmitted CBG data corresponding to the retransmission CBG. For example, when the number of CBGs included in a predetermined transmission period is S, the number of CBGs used in the current retransmission is also S.

In some embodiments, the method further comprises: and mapping retransmission CBG on the TB, and mapping new retransmission CBG on the TB.

In this embodiment, the retransmission CBG is mapped on the TB preferentially, and then the mapping of the new retransmission CBG is performed, so that the preferential transmission of the retransmission data can be ensured, and the unified understanding of the physical mapping mode of the base station and the terminal to the bits in the retransmission TB can be ensured.

As shown in fig. 3, this embodiment provides a data transmission method, which is applied to a terminal, and includes:

receiving DCI which is sent by a base station and comprises a code block group CBG transmission indication list;

1 status indication bit for indicating a transmission status of one CBG;

the CBG includes: a plurality of CBs for data transmission;

In this embodiment, the terminal may receive DCI carrying the CBG transmission indication list sent by the base station. In this embodiment, the transmission status of each CBG in the TB to be received is determined according to at least the status bits in the CBG transmission indication list, which has the characteristic of small indication bit overhead.

In this embodiment, the method further includes:

and determining retransmission CBG for retransmitting data transmission and/or determining new transmission CBG for new transmission or blank transmission CBG for no data transmission according to the CBG transmission indication bit.

In some embodiments, if the DCI indicates that data is newly transmitted, and if the status indication bit is the second value, the transmission status of the corresponding CBG is indicated as a new transmission status;

For example, the terminal may determine whether to newly transmit or retransmit data through RRC signaling, MAC layer signaling, system message, or higher layer signaling, or determine whether to newly transmit or retransmit data according to comparison between the number of bits included in the DCI currently received and the number of CGBs included in the preset transmission period. And determining whether the current indicated new transmission state or the idle transmission state is determined by combining the specific value of the state indication bit.

In this embodiment, a plurality of status indication bits share one domain bit, and a transmission mode corresponding to the corresponding status indication bit is indicated.

Optionally, the method further comprises: determining the length TBS of one transmission block TB; determining the number of retransmission CBGs used for retransmission in the TB according to the CBG indication bit list;

Calculating the difference value of the bit number included by the TBS and the retransmission CBG;

if the difference value is not greater than a preset value, the transmission mode of the TB is a first mode, otherwise, the transmission mode of the TB is a second mode; or the difference value between the TBS and the bit number included in the retransmission CBG is not greater than a preset value, the transmission mode of the TB is the second mode, otherwise, the transmission mode of the TB is the first mode;

if the transmission mode is the first mode, if the status indication bit is the second value, the status indication bit is used for indicating that the transmission status of the corresponding code block group is a new transmission status;

and if the transmission mode is the second mode, if the state indication bit is the second value, the state indication bit is used for indicating that the corresponding code block group is used for the null transmission state.

In this embodiment, the base station does not indicate the transmission mode of the TB corresponding to the terminal, but implicitly indicates the transmission mode of the terminal TB through the length of one TBs and the retransmission CBG.

Optionally, the method further comprises:

and receiving a system message carrying indication information or RRC signaling sent by a base station, wherein the indication information is used for indicating the length of the CBG transmission indication list.

In this embodiment, the length of the CBG transmission indication list may be received from the base station through the broadcast information message, or the unicast RRC information, or other multicast information, and the subsequent terminal may decode the CBG transmission indication list in the DCI according to the indicated length.

In some embodiments, the method further comprises at least one of:

according to the receiving condition of the new transmission data, sending the 1 st HARQ feedback information of the automatic hybrid request retransmission HARQ;

according to the receiving condition of the new transmission data and the receiving condition of the 1 st to nth retransmission data, transmitting n+1th HARQ feedback information; wherein n is an integer not less than 2.

In this way, after one retransmission, the ue does not completely receive the required data, and the ue integrally determines the HARQ feedback information according to the receiving status of the new retransmission and the receiving status of each retransmission. The number of bits included in the HARQ feedback information is at least equal to the number of CBGs included in one preset transmission period, that is, at least includes feedback bits. 1 feedback bit indicates a reception status of one CBG, the reception status including: both states indicating successful reception and indicating failed reception, the successful reception may correspond to an Acknowledgement (ACK), and the unsuccessful reception may correspond to a non-acknowledgement (NACK).

For example, the HARQ feedback information includes: at least equal to the feedback bits of the CGB number used by the newly transmitted data; one of the feedback bits indicates a reception condition of one of the CBGs. For example, the new transmission data uses 4 CBGs, and the HARQ feedback information includes at least 4 bits.

In some embodiments, the HARQ feedback information comprises: checking bits; wherein the check bit is used to check the feedback bit.

In this embodiment, the check bit may be one or more bits, where the bit is used to facilitate the base station to check whether the HARQ feedback information currently received has a problem of misunderstanding through an operation relationship with the feedback bit, so as to improve the decoding success rate of the HARQ feedback information and reduce the retransmission times.

In some embodiments, the maximum number of retransmissions corresponding to a new transmission is equal to the maximum number of processes for the pre-configured HARQ. For example, the maximum HARQ process number is 7, the user equipment may request 7 retransmissions.

In some other embodiments, the maximum number of retransmissions corresponding to a new transmission is indicated by the base station through at least one of RRC signaling, MAC signaling, and DCI signaling. For example, the base station indicates, through RRC signaling, that the maximum number of retransmissions corresponding to one new transmission data is equal to 3.

In the embodiment of the invention, the data transmission method applied in the terminal needs to know the CB number included in each new CBG, so the method further comprises the following steps:

calculating a new transmission CB number for new transmission according to the length of the transmission block TBS and the bit number contained in all retransmission CBGs for retransmission;

calculating the number of new CBGs based on the retransmission CBG number and the length of the CBG transmission indication list;

and calculating the CB number included by each CBG based on the new CB number.

For example, said calculating the CB number included in each of said CBGs includes:

wherein the { #CB }, is _{New transfer CBG_k} A CB number included in a kth new transmission CBG in one transmission block TB; by a means ofThe A is the new transmission CB number; and M is the new CBG number.

In the retransmission, in order to simplify the determination of the CB number included in the retransmission CBG, the CB number included in each retransmission CBG is equal to the CB number included in the CBG of the last transmission corresponding to the retransmission CBG.

As shown in fig. 4, an embodiment of the present invention provides a communication device, including:

a first transceiver 110 for information interaction with other communication devices;

the first processor 120 is connected to the first transceiver, and is configured to implement the micro time slot indication method or the micro time slot determination method provided in any one or more of the foregoing embodiments by executing a computer program.

When the communication device is a base station, the first processor 120 may implement one or more of the aforementioned data transmission indication methods through execution of a computer program. Correspondingly, the first transceiver 110 may be used for communication with a terminal.

When the communication device is a base station, the first processor 120 may implement one or more of the aforementioned data transmission indication determination methods through execution of a computer program. Correspondingly, the first transceiver 110 may be configured to communicate with a base station.

The first processor 120 in this embodiment may be a processor or a processing circuit such as CPU, MCU, DSP, AP, PLC or ASIC.

The base station or the terminal formed by the communication equipment can establish a wireless communication system, and the base station indicates data transmission and has the characteristic of low signaling overhead through the interaction of the first signaling and the second signaling.

The present embodiment provides a communication apparatus including: a second processor and a computer program;

the second processor is configured to implement the data transmission instruction method or the data transmission method provided by any one or more of the foregoing technical solutions by executing the computer program.

The present embodiment provides a communication device including a second processor and a computer program. The computer program herein may be computer executable code that is executed by the second processor. The second processor may also be a processor or processing circuit such as CPU, MCU, DSP, AP, PLC or ASIC.

When the communication device is a base station, the second processor may implement one or more of the foregoing data transmission indication methods by execution of a computer program.

When the communication device is a terminal, the second processor may implement one or more of the foregoing data transmission methods through execution of a computer program.

The embodiment of the invention also provides a computer storage medium, which stores a computer program, and the computer program can realize the data transmission indication method or the data transmission indication determination method provided by any one or more of the technical schemes after being executed by a processor.

The computer storage medium may be a read-only storage medium, a flash memory, a mobile hard disk, an optical disk, a magnetic tape, or other storage media, and may be a non-transitory storage medium.

A specific example is provided below in connection with any one or more of the embodiments described above:

Example 1:

the present example provides a retransmission Transport Block (TB) that includes a plurality of CBGs for retransmission only. In this way, a bit map indicating the transmission status of each CBG in the TB is set in the retransmission DCI to indicate which CBGs are retransmitted this time. Fig. 5A is a schematic diagram of a bit map in DCI indicating a transmission status of CBG. The bit length of the bit map shown in fig. 5A and the number of CBGs included in the initial transmission TB are the same, and the number of CBs included in each of the retransmission CBGs is equal to the number of CBs included in the CBG of the last transmission corresponding to the retransmission CBG.

For example, in the schematic diagram 5A, the bit map in the retransmission DCI includes a total of 4 status indication bits, and the corresponding value is [1, 0,1], where "1" indicates a retransmission status and "0" indicates a null transmission status. Wherein, the retransmission state refers to the corresponding indicated CBG bearing retransmission data; the null transmission state refers to that the CBG indicated by the corresponding CBG does not carry any information.

When the UE receives the retransmission DCI, the UE can correctly understand: the retransmission data includes the 1 st CBG (i.e. CBG 0), the 2 nd CBG (i.e. CBG 1) and the 4 th CBG (i.e. CBG 3) in the primary transmission data.

Example 2:

in this example, to increase the effective utilization of the TB, the indication problem becomes more complex by allowing the retransmission of the TB to include both the retransmission CBG and the new transmission CBG. The retransmission CBG here is a CBG for carrying retransmission data, and the new transmission CBG may be a CBG carrying new transmission data.

As shown in fig. 6 and 7, the TB transmitted at the nth time includes CBG0 to CBG3, wherein CBG0 and CBG2 need retransmission.

In the n+1th transmission, when a retransmission TB contains both a retransmission CBG and a new transmission CBG, it is necessary to discuss the transmission status of the retransmission TB in some cases.

Case 1: only the retransmission CBG is contained in the retransmission TB;

for example, DL traffic of a certain UE is small, and no new data needs to be transmitted, so only the retransmission CBG needs to be included in the retransmission TB.

Case 2: the retransmission TB contains both a retransmission CBG and a new transmission CBG;

for example, a UE has a large amount of DL traffic and a large amount of new transmission data waiting to be transmitted, and thus the retransmission TB includes both the retransmission CBG and the new transmission CBG.

Each CBG transmission mode in the CBG transmission indication list is selected from 3 transmission states, including: 3 transmission states of { new transmission, retransmission, null transmission }. The hollow transmission may also be referred to as non-transmission in this example, i.e. no data that needs to be transmitted to the UE is carried on the corresponding CBG.

This example proposes an indication manner of CBG-based HARQ retransmission, including:

the DCI includes a CBG transmission mode indication list, wherein each CBG transmission mode in the list is selected from 3 transmission states, including: { new transmission, retransmission, null transmission }.

Each CBG transmission state is indicated with 1 bit, where a convention of "1" represents a retransmission and "0" represents a new or null transmission. Of course, in some examples, "0" represents a retransmission and "1" represents a new or empty transmission.

Hereinafter, description will be made with "1" representing retransmission and "0" representing new transmission or null transmission.

The indication of the new transmission or the empty transmission indicated by the "0" may be performed in an explicit manner or may be performed in an implicit manner.

Dominant indication:

as shown in fig. 5B, in order to facilitate a new transmission or a null transmission represented by "0" corresponding to the UE, the DL DCI further includes a 1-bit indication field to indicate a specific meaning represented by "0" in the CBG transmission mode. For example, in schematic fig. 5B, the bit map in the retransmission DCI includes 5 bits in total, which is divided into a-field and B-field. The domain indication bits corresponding to the A domain are 1 bit, the state indication bits corresponding to the B domain are 4 bits, the 4 bits are the state indication bits, and the corresponding value is [1, 0,1], wherein '1' indicates retransmission state and '0' indicates null transmission state or new transmission state. Namely, the retransmission state refers to the corresponding indicated CBG bearing retransmission data; the new transmission state refers to that the CBG corresponding to the indication bears new transmission data; the null transmission state refers to that the CBG indicated by the corresponding CBG does not carry any information.

When the UE receives the retransmission DCI, the UE can correctly understand: "1" indicates a retransmission state, and thus the 1 st CBG (i.e., CBG 0), the 2 nd CBG (i.e., CBG 1), and the 4 th CBG (i.e., CBG 3) in the primary transmission data are included in the current retransmission data.

And indicates whether the new transmission is a null transmission or a new transmission represented by "0", the indication is indicated by a domain indication bit corresponding to the a domain.

As shown in fig. 6, the CBG transmission indication bits each include 4 CBG status indication bits and 1 domain indication bit, and the 4 status indication bits share 1 domain indication bit. The field indication bit is used for indicating whether a "0" in the corresponding CBG is a new transmission or a null transmission. In fig. 6, in the n+1th transmission, the status indication bits of the case 1 and the case 2 are the same, but the domain indication bits are different, and after the terminal receives the status indication bits, it may be determined whether the second value in the status indication bits indicates a null transmission status or a new transmission status according to the value of the domain indication bits.

Specifically, for example, as shown in fig. 6, the DL grant DCI further includes a 1-bit indication field (denoted as a field) to indicate a specific meaning represented by 0 in the CBG transmission mode (denoted as B field).

In particular, when a=1, then 0 in the B field represents a new transmission; and when a=0, then 0 in the B field represents no transmission.

Implicit indication:

determining the concrete meaning represented by 0 in the CBG transmission mode through implicit rules;

when the residual TBS (TBS) after the retransmission CBG is planed is larger than a preset value, 0 represents a new transmission; otherwise, 0 represents no transmission.

As shown in fig. 7, in both cases, the bits in the CBG transmission mode indication list in the retransmission DCI are identical, are all [1,0,1,0], but represent different meanings.

The UE firstly determines that the 1 st and 3 rd CBGs transmitted last time are at least included in retransmission data through 1 in the CBG transmission mode indication list; determining the number of bits included in the retransmission CBG through historical data;

the UE further determines a retransmission TBS (Transport Block length, transport Block size) through MCS and RAI (Resource Block Assignment Indication, resource allocation indication) in the DCI.

The UE calculates the remaining TBS after the retransmission CBG is planed, i.e

Residual TBS = number of bits included in retransmission TBS-retransmission CBG;

the UE compares the remaining TBS to some preset value (noted as X, e.g., x=6144 bits, corresponding to 1 standard CB length) in size.

In case 1, the remaining tbs≡0 bit < X, so the UE asserts that "0" in the CBG transmission mode indication list represents no transmission; whereas in case 2, the remaining tbs≡19CB > =x, so the UE asserts that 0 in the CBG transmission mode indication list represents a new transmission.

Example 3:

based on example 1 and example 2, this example proposes an indication manner of CBG-based HARQ retransmission, further including:

before transmitting the DCI, the network side configures the size of the CBG transmission mode indication list, i.e., configures the number of CBG transmission modes included in the CBG transmission mode indication list, through a system message or RRC signaling.

Example 4:

based on example 2, the present example further includes:

since each CBG transmission mode is indicated with 1 bit, the number of CBG transmission modes is equal to the number of bits of the CBG transmission mode indication list field. For example, if the number of CBGs corresponding to one TB is 4, the number of bits included in the TB transmission indication list is 4.

Example 5:

based on example 1, the present example also includes,

during retransmission, the number of CBs included in each retransmission CBG is unchanged, i.e., the number of CBs included in each retransmission CBG is equal to the number of CBs included in the corresponding CBG at the time of last transmission.

In some examples, the number of CBs included in each new CBG is calculated as follows:

calculating a new TBS = total TBS of the current transmission-TBS corresponding to the current retransmission CBG;

CB segmentation is carried out on the new transmission TBS, and the total number (A) of the new transmission CBs is obtained;

calculating the size of a CBG transmission mode indication list in the preconfigured DCI, which is described in the point 5, of the total number (M) of new transmission CBGs contained in the transmission;

Counting the number of CBs contained in each new CBG, i.e

Wherein the { #CB }, is _{New transfer CBG_k} A CB number included for a kth CBG within one transport block TB; the A is the new transmission CB number; the M is the new CBG number, where k=1, 2, …, M.

For the nth transmission (or it can be understood that a new transmission), the DCI indicates that all CBGs are new transmissions.

the UE first determines the total TBS of the present transmission by MCS and RAI in the DCI (Resource block Assignment Indication, resource allocation indication).

Since there is no retransmission CBG, tbs=0 corresponding to the current retransmission CBG;

new tbs=total TBS of the present transmission-0=total TBS of the present transmission;

performing CB segmentation on the new transmission TBS, and obtaining a=30 CBs may be provided;

the base station can be configured by RRC, and the CBG transmission mode indication list in DCI is equal to the size=4;

since there is no retransmission CBG, the number of retransmission CBGs at this time=0;

Therefore, the total number of new CBGs (M) =4-0=4 included in the current transmission;

calculating the number of CBs contained in each new CBG:

thus 8 CBs are contained in the first 3 CBGs and 6 CBs are contained in the last CBG.

For case 1 in the n+1th transmission, the dci indicates that only the retransmission CBG is included in the retransmission data.

In some embodiments, the number of CBs included in each retransmission CBG at the time of retransmission is unchanged. Therefore, CBG0 and CBG2 each contain 8 CBs.

For case 2 in the n+1th transmission, the dci indicates that the retransmission data includes the retransmission CBG and also includes the new transmission CBG.

During retransmission, the number of CBs included in each retransmission CBG is unchanged. Therefore, CBG0 and CBG2 each contain 8 CBs.

The number of CBs included in each new CBG is calculated as follows.

Since there is a retransmission CBG, the new transmission tbs=total TBS transmitted this time-TBS corresponding to the retransmission CBG this time;

and performing CB segmentation on the new TBS. Let a=19 CBs be obtained;

Calculating the total number (M) =the size of a CBG transmission mode indication list in the preconfigured DCI, which is the total number (M) of new CBGs included in the current transmission, and the number of CBGs retransmitted at the current time;

since 2 CBGs are retransmitted, the number of CBGs retransmitted this time=2;

therefore, the total number of new CBGs (M) =4-2=2 included in the current transmission;

calculating the number of CBs contained in each new CBG

Thus, the first new CBG contains 10 CBs, while the second new CBG contains 9 CBs.

Example 6:

based on examples 1 to 5, in this example, on the physical resource map, retransmission CBG is sent first, and then new retransmission CBG is sent;

in some embodiments, as mentioned above for case 2, at the n+1th transmission, the gNB sends retransmission CBGs (i.e., CBG0 and CBG 2) first, and then sends new transmission CBGs (i.e., CBG4 and CBG 5) from the perspective of physical resource mapping.

Example 7:

based on examples 1 to 6, in the present example, the n+1st transmission and the n-th transmission use the same number of HARQ processes in DCI.

Example 8:

as shown in fig. 8, the present example provides a data transmission method, including:

step S201: the UE receives the newly transmitted data and finds that CBG1 and CBG2 in a preset transmission period comprising 4 CBGs fail to be received;

Step S202: the UE feeds back information to the 1 st HARQ of the base station based on the receiving condition, and the transmitted HARQ feedback information at least comprises 4 feedback bits, wherein the feedback content corresponding to the 4 feedback bits is more [ ACK, NACK, NACK, ACK ];

step S203: the base station performs the 1 st retransmission based on the received 1 st HARQ feedback information, and in the example shown in fig. 8, the 1 st HARQ feedback information is misinterpreted as [ ACK, NACK, ACK, ACK ], so that only CBG1 is retransmitted;

step S204: the UE receives the receiving status of the 1 st retransmission and the new transmission, and sends the second HARQ feedback information to the base station, and if CBG1 is correctly received and decoded, at this time, the second HARQ feedback information is: [ ACK, ACK, NACK, ACK ];

step S205: and transmitting the 2 nd retransmission based on the 2 nd HARQ feedback information, and repeating the steps S202 to S204 until all CBGs of the newly transmitted data are successfully received or are larger than the maximum HARQ process.

The method shown in fig. 8 further includes:

step S206: the UE sends HARQ feedback information of the 3 rd time based on the data new transmission, the 1 st retransmission and the 2 nd retransmission, and if the retransmission decoding of the CGB2 is correct, the HARQ feedback information of the 3 rd time is: [ ACK, ACK, ACK, ACK ].

Both the new transmission data and the retransmission data belong to one of the DL data, and the DCI belongs to one of the DL indications.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.

The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated in one processing module, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A data transmission indicating method, which is applied to a base station, comprising:

transmitting downlink control information DCI comprising status indication bits of N code block groups CBG to a terminal; the N is greater than or equal to 1; wherein, the liquid crystal display device comprises a liquid crystal display device,

the CBG comprises a plurality of code blocks CB used for data transmission;

2. A data transmission indicating method, which is applied to a base station, comprising:

The CBG comprises a plurality of CBs for data transmission;

3. A method according to claim 1 or 2, characterized in that,

if the state indication bit is a first value, the state indication bit is used for indicating the transmission state of the corresponding CBG to be a retransmission state; or alternatively, the process may be performed,

if the state indication bit is a second value, the state indication bit is used for indicating that the transmission state of the corresponding CBG is a new transmission state or a null transmission state;

the first value is different from the second value.

4. The method of claim 3, wherein the step of,

one of the domain indication bits for indicating transmission modes of a plurality of CBGs included in one transport block TB; the transmission modes include a first mode and a second mode;

if the transmission mode is the first mode, and if the status indication bit is the second value, the transmission mode is used for indicating that the transmission status of the corresponding CBG is a new transmission status; or alternatively, the process may be performed,

and if the transmission mode is the second mode, and if the state indication bit is the second value, the transmission state of the corresponding CBG is indicated to be an idle transmission state.

5. The method of claim 3, wherein the step of,

if the DCI indicates that the data is newly transmitted, and if the state indication bit is the second value, the DCI is used for indicating that the transmission state of the corresponding CBG is a new transmission state; or alternatively, the process may be performed,

and if the DCI indicates data retransmission and the status indication bit is the second value, the DCI is used for indicating that the transmission status of the corresponding CBG is an idle transmission status.

6. The method according to claim 4, wherein the method further comprises:

if the difference value between the length TBS of the TB and the sum of the bit numbers included in all retransmission CBGs is not greater than a preset value, the transmission mode of the TB is the second mode, otherwise, the transmission mode of the TB is the first mode;

7. The method according to claim 1 or 2, characterized in that the method further comprises:

Transmitting at least one of system information, radio Resource Control (RRC) signaling and Media Access Control (MAC) layer signaling carrying indication information to a terminal, wherein the indication information is used for indicating the length of a CBG transmission indication list; the CBG transmission indication list includes status indication bits of the N CBGs.

8. The method of claim 7, wherein the method further comprises:

calculating a new transmission CB number for new transmission according to the TBS and the bit number contained in all retransmission CBGs for retransmission;

calculating a new CBG number based on the retransmission CBG number and the length of the CBG transmission indication list;

and calculating the CB number included by each CBG based on the new CB number.

9. The method of claim 8, wherein said calculating the number of CBs each of said CBGs comprises:

wherein the { #CB }, is _{New transfer CBG_k} A CB number included for a kth new transmission CBG in one TB; the A is the new transmission CB number; and M is the new CBG number.

10. The method according to any one of claims 6, 8, 9, wherein the method further comprises:

and mapping retransmission CBG on the TB, and mapping new retransmission CBG on the TB.

11. A method according to claim 1 or 2, characterized in that,

and the CB number included in each retransmission CBG is equal to the CB number included in the CBG transmitted last time corresponding to the retransmission CBG.

12. A data transmission method, applied to a terminal, comprising:

the CBG comprises a plurality of CBs for data transmission;

13. A data transmission method, applied to a terminal, comprising:

The CBG comprises a plurality of CBs for data transmission;

14. The method according to claim 12 or 13, wherein,

the first value is different from the second value.

15. The method of claim 14, wherein the step of providing the first information comprises,

one of the domain indication bits for indicating transmission modes of a plurality of CBGs included in one TB; the transmission modes include a first mode and a second mode;

16. The method of claim 14, wherein the step of providing the first information comprises,

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

determining a TBS of one TB;

determining the number of retransmission CBGs used for retransmission in the TB according to the CBG transmission indication list; wherein the CBG transmission indication list includes status indication bits of the N CBGs;

calculating the difference value of the sum of the TBS and the bit number included by all retransmission CBGs;

if the difference value is not greater than a preset value, the transmission mode of the TB is the first mode, otherwise, the transmission mode of the TB is the second mode; or the difference value between the TBS and the bit number included in the retransmission CBG is not greater than a preset value, the transmission mode of the TB is the second mode, otherwise, the transmission mode of the TB is the first mode;

18. The method according to claim 12 or 13, characterized in that the method further comprises:

receiving an indication of a system message, an RRC signaling and a MAC layer signaling which are sent by a base station and carry indication information, wherein the indication information is used for indicating the length of a CBG transmission indication list; the CBG transmission indication list includes status indication bits of the N CBGs.

19. The method according to claim 12 or 13, characterized in that the method further comprises:

20. The method of claim 19, wherein the step of determining the position of the probe comprises,

The HARQ feedback information includes: feedback bits at least equal to the number of CGB used for the newly transmitted data;

one of the feedback bits indicates a reception condition of one of the CBGs.

21. The method according to claim 12 or 13, characterized in that the method further comprises:

calculating a new transmission CB number for new transmission according to the TBS of one TB and the bit number contained in all retransmission CBGs for retransmission;

and calculating the CB number included by each CBG based on the new CB number.

22. The method of claim 21, wherein the step of determining the position of the probe is performed,

said calculating the number of CBs included in each of said CBGs includes:

23. The method according to claim 12 or 13, wherein,

24. A communication device, comprising:

A first processor, coupled to the first transceiver, for implementing the method provided in any one of claims 1 to 23 by executing a computer program.

25. A communication device, comprising: a second processor and a computer program;

the second processor is configured to implement the method provided in any one of claims 1 to 23 by executing the computer program.

26. A computer storage medium storing a computer program which, when executed by a processor, is capable of carrying out the method provided in any one of claims 1 to 23.