CN111147182B - Communication method and device - Google Patents

Abstract

The present application discloses a communication method and device. The method includes: determining a first CBG number according to a time domain characteristic of a physical downlink shared channel PDSCH; determining a size of feedback signaling of a transport block TB carried in the physical downlink shared channel according to the first CBG number; The size of the feedback signaling of the transport block TB carried in the shared channel determines the feedback signaling of the transport block TB carried in the physical downlink shared channel; and the feedback signaling is sent. Corresponding devices are also disclosed. With the solution of the present application, the number of CBGs used to generate feedback signaling can be flexibly determined according to the time domain characteristics of the PDSCH, thereby reducing the size of the feedback signaling and improving system transmission efficiency.

Description

Communication method and device

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and apparatus.

Background technique

In a wireless communication system, the sender and the receiver usually use a hybrid automatic repeat request (HARQ) technology to ensure the correctness of data transmission. This technique combines forward error correction (FEC) with automatic repeat request (ARQ). After a data block (generally referred to as a transport block (TB)) is encoded, information bits and a part of redundant bits are sent in the first transmission. If the receiving end can decode correctly, an acknowledgment (ACK) signal is fed back to the sending end, and the sending end confirms that the corresponding information bits have been successfully received, and considers that the TB has been successfully transmitted. If the receiving end cannot decode correctly, it feeds back a non-acknowledgment (NACK) to the sending end. After the sender receives the NACK, it further transmits a part of the information bits and or redundant bits to the sender, which is called retransmission data. After the receiving end receives the retransmitted data, it is combined with the previously received data and decoded. If the redundant bits added for retransmission still cannot be decoded normally, retransmission is performed again. With the increase of the number of retransmissions, the redundant bits are continuously accumulated, and the channel coding rate is continuously reduced, so that a better decoding effect can be obtained.

As shown in the schematic diagram of TB division as shown in FIG. 1 , if the TB is relatively large, a TB is usually divided into multiple code blocks (code blocks, CBs). Each CB is individually encoded. Multiple encoded CBs are transmitted to the receiver as a physical data block after rate matching, interleaving, concatenation, etc. In order to further improve the transmission efficiency, multiple CBs are formed into a group, which is called a code block group (code block group, CBG).

At the receiving end, a feedback signal ACK/NACK is generated for whether each CBG is correctly received. If there are N CBGs, an N-bit feedback signal is generated. Each bit indicates whether the CBG was received correctly. After receiving the N-bit feedback signal, if it is detected that a certain CBG has not been correctly received, only the data of the CBG needs to be retransmitted, and those CBGs that have been correctly received do not need to be retransmitted, thereby improving the transmission efficiency of the system.

Whether the TB communicated in one cell is to be divided into multiple CBGs, and whether the TBs are divided into several CBGs is determined by the network, and notified to the terminal device through high-layer signaling configured by the network. One of the CBGs has a maximum configuration of 8. At this time, one TB requires 8-bit feedback signaling.

In addition, the ACK/NACK signaling of multiple TBs is usually fed back in one time slot, and these feedback signalings form a feedback signaling codebook. The size of the feedback signaling codebook is determined by the number of TBs to be fed back in the codebook and the number of CBGs of each TB. The TB to be fed back in a feedback signaling codebook is determined according to the number of transmission carriers of the data to be fed back on the carrier and the number of TBs to be fed back on each carrier. For example, each time slot has a maximum of 7 TBs, and a feedback signaling codebook has a maximum of 8 TBs of different time slots, then the data of a component carrier (CC) needs to be in a feedback signaling codebook Feedback 7*8=56 TBs of feedback signaling. If each TB has 8 CBGs, the signaling to be fed back is 56*8=448 bits. Further, if one feedback signaling codebook includes multiple CCs, for example, 4 CCs, then one feedback signaling codebook includes 448*4=1792 bits.

According to the above calculation method, one feedback signaling codebook contains up to 1792 bits. If the feedback signaling is larger than a certain value, for example, larger than 360 bits, it needs to be divided into blocks, for example, it needs to be divided into 2 code blocks. Transmitting too much feedback signaling also increases system redundancy and reduces system efficiency. At the same time, the number of code blocks to be transmitted increases due to the block division, which increases the coding complexity of the device that sends the feedback signaling and the decoding complexity of the device that receives the feedback signaling.

SUMMARY OF THE INVENTION

The present application provides a communication method and apparatus to reduce the number of bits fed back during data transmission.

In a first aspect, a communication method is provided, comprising: determining a first CBG number according to a time domain characteristic of a physical downlink shared channel PDSCH; size of the feedback signaling; determining the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel; and sending the feedback signaling.

In this aspect, the number of CBGs used to generate the feedback signaling can be flexibly determined according to the time domain characteristics of the PDSCH, so that the size of the feedback signaling can be reduced and the system transmission efficiency can be improved.

In a possible implementation manner, determining the first CBG number according to the time domain characteristic of the PDSCH includes: determining the second CBG number according to the time domain characteristic of the PDSCH; and determining the first CBG number according to the second CBG number A CBG count.

In another possible implementation manner, determining the first CBG number according to the second CBG number includes: determining a first CBG number according to the second CBG number, where the first CBG number is equal to the second CBG number CBG count.

In yet another possible implementation manner, determining the first CBG number according to the second CBG number includes: determining the first CBG number according to the second CBG number and the third CBG number, the first CBG number The number is the smaller of the second CBG number and the third CBG number, where the third CBG number is a parameter configured by the network.

In this implementation manner, taking the first CBG number as the smaller value of the second CBG number and the third CBG number can reduce the size of feedback signaling and improve transmission efficiency.

In yet another possible implementation manner, determining the first CBG number according to the second CBG number includes: determining the first CBG number according to the feedback codebook type.

In another possible implementation manner, determining the first CBG number according to the feedback codebook type, characterized in that the method includes: for the first type of feedback codebook, the first CBG number is equal to the second CBG number, Or the first CBG number is the smaller of the second CBG number and the third CBG number, where the third CBG number is a parameter configured by the network; for the second type of feedback codebook, the third CBG number is a parameter configured by the network. A CBG number is equal to the second CBG number, or the first CBG number is equal to the third CBG number.

In this implementation manner, the first CBG number is determined in different ways for the first type codebook and the second type codebook respectively, which can increase more flexibility.

In yet another possible implementation manner, determining the second CBG number according to the time domain characteristic of the PDSCH includes: determining the first time domain resource number according to the time domain characteristic of the PDSCH; and determining the first time domain resource number according to the time domain characteristic of the PDSCH; The number of domain resources to determine the second CBG number.

In another possible implementation manner, the second CBG number is determined according to the first time domain resource number M, and the first time domain resource number M and the second CBG number satisfy any one of the following formulas:

或

or

或

or

或

or

或

or

为第四CBG参数，

为第五CBG参数。in,

is the fourth CBG parameter,

is the fifth CBG parameter.

In another possible implementation manner, the determining the number of the second CBGs according to the first number M of time domain resources includes: determining the second number of CBGs according to the mapping relationship between the number M of the first time domain resources and the number of CBGs CBG count.

In yet another possible implementation manner, determining the second CBG number according to the time domain characteristic of the PDSCH includes: determining the second CBG number according to the PDSCH mapping type.

In yet another possible implementation manner, determining the second CBG number according to the PDSCH mapping type includes: when the PDSCH mapping type is type A, determining the second CBG number as the third CBG number and when the mapping type of the PDSCH is type B, determining that the second CBG number is the fifth CBG number.

In yet another possible implementation manner, the method further includes: determining the number of CBGs in the TB carried in the PDSCH according to the first CBG number.

In another possible implementation manner, the sending the feedback signaling includes: sending the feedback signaling in a manner of multiplexing and transmission with the PUSCH.

In another possible implementation manner, the determining the second CBG number according to the time domain characteristic of the PDSCH includes: determining the second CBG number according to the time domain symbol number occupied by the PDSCH.

In another possible implementation manner, the determining the second CBG number according to the time domain characteristic of the PDSCH includes: determining the PDSCH time domain symbol number and the third CBG number according to the time domain characteristic of the PDSCH, and determining the second CBG number. The number of CBGs, where the third number of CBGs is a parameter configured by the network device.

In another possible implementation manner, the second CBG number is determined according to the time domain characteristics of the PDSCH, and the second CBG number satisfies any one of the following formulas:

或

or

或

or

或

or

或

or

或

or

或

or

为所述第一CBG数，

为所述第二CBG数，

为所述第三CBG数，

为第四CBG参数。L为PDSCH的时域符号的个数，S为一个时隙中包含的符号的个数，n为PDSCH的时域总的时隙数。在又一种可能的实现方式中，所述根据PDSCH的时域特性，确定第二CBG的数量，包括：根据PDSCH时域符号的个数与CBG数量的映射关系，确定第二CBG数。in,

is the first CBG number,

is the second CBG number,

is the third CBG number,

is the fourth CBG parameter. L is the number of time-domain symbols of PDSCH, S is the number of symbols included in one time slot, and n is the total number of time-domain time slots of PDSCH. In another possible implementation manner, the determining the number of the second CBGs according to the time domain characteristics of the PDSCH includes: determining the second CBG number according to a mapping relationship between the number of PDSCH time domain symbols and the number of CBGs.

In a second aspect, a communication method is provided, including: determining a value of a parameter used for calculating the size of feedback signaling of a transport block carried in a physical downlink shared channel; The value of the parameter of the size of the feedback signaling of the bearer transport block is sent to the terminal device.

In this aspect, by sending the value of the parameter for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel to the terminal device, the size of the feedback signaling codebook determined by the terminal device according to the above parameters is not equal to If the threshold is exceeded, the size of the feedback signaling can be reduced and the transmission efficiency of the system can be improved.

In a possible implementation manner, the determining the value of the parameter used for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel includes: determining the value used for calculating the transmission carried in the physical downlink shared channel The value of the parameter of the size of the feedback signaling of the block, so that the feedback signaling codebook is less than or equal to the threshold.

In a third aspect, a communication method is provided, comprising: determining the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel; determining the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel; feedback signaling of the transport block TB carried in the physical downlink shared channel; and sending the feedback signaling.

In this aspect, by adjusting the value of the parameter used to calculate the size of the feedback signaling of the transport block carried in the physical downlink shared channel, the size of the feedback signaling codebook determined by the terminal device according to the above parameters does not exceed the threshold value, Therefore, the size of the feedback signaling can be reduced, and the transmission efficiency of the system can be improved.

In a possible implementation manner, the method further includes: receiving a value of a parameter sent by the network device for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel; The size of the feedback signaling of the transport block TB includes: determining the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the value of the parameter, so that the feedback signaling codebook is less than or equal to the threshold value .

In another possible implementation manner, the method further includes: receiving a value of a parameter sent by the network device and used for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel; The size of the feedback signaling of the transport block TB carried by the bearer includes: determining the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the value of the parameter; and when the feedback signaling codebook exceeds a threshold value , it is determined that the feedback signaling codebook is invalid, or NACK is fed back in the feedback signaling codebook, or no feedback is performed.

In a fourth aspect, a communication apparatus is provided, which can implement the communication method of the first aspect or the third aspect. For example, the communication device may be a chip (such as a communication chip, etc.) or a terminal device. The above method can be implemented by software, hardware, or by hardware executing corresponding software.

In a possible implementation manner, the structure of the communication apparatus includes a processor and a memory; the processor is configured to support the apparatus to perform the corresponding functions in the above communication method. The memory is used for coupling with the processor, which holds the necessary programs (instructions) and/or data for the apparatus. Optionally, the communication apparatus may further include a communication interface for supporting communication between the apparatus and other network elements.

In another possible implementation manner, the communication apparatus may include a unit module that performs the corresponding actions in the above method.

In yet another possible implementation, it includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is configured to execute a computer program or instruction to control the transceiver to receive and transmit information. Send; when the processor executes the computer program or instructions, the processor is further configured to implement the above method. Wherein, the transceiver may be a transceiver, a transceiver circuit or an input/output interface. When the communication device is a chip, the transceiver device is a transceiver circuit or an input and output interface.

In another possible implementation manner, the structure of the communication apparatus includes a processor; the processor is configured to support the apparatus to perform the corresponding functions in the above communication method.

In another possible implementation manner, the structure of the communication device includes a processor, and the processor is configured to be coupled to the memory, and read instructions in the memory, and implement the above method according to the instructions.

In yet another possible implementation manner, the structure of the communication device includes a transceiver for implementing the above communication method.

When the communication device is a chip, the transceiver unit may be an input/output unit, such as an input/output circuit or a communication interface. When the communication apparatus is a user equipment, the transceiver unit may be a transmitter/receiver or a transmitter/receiver.

In a fifth aspect, a communication apparatus is provided, which can implement the communication method in the second aspect. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a network device, and the above method may be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation manner, the structure of the communication apparatus includes a processor and a memory; the processor is configured to support the apparatus to perform the corresponding functions in the above communication method. The memory is used for coupling with the processor, which holds the necessary programs (instructions) and data for the apparatus. Optionally, the communication apparatus may further include a communication interface for supporting communication between the apparatus and other network elements.

In another possible implementation manner, the communication apparatus may include a unit module that performs the corresponding actions in the above method.

In yet another possible implementation, it includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is configured to execute a computer program or instruction to control the transceiver to receive and transmit information. Send; when the processor executes the computer program or instructions, the processor is further configured to implement the above method. Wherein, the transceiver may be a transceiver, a transceiver circuit or an input/output interface. When the communication device is a chip, the transceiver device is a transceiver circuit or an input and output interface.

In another possible implementation manner, the structure of the communication apparatus includes a processor; the processor is configured to support the apparatus to perform the corresponding functions in the above communication method.

In another possible implementation manner, the structure of the communication device includes a processor, and the processor is configured to be coupled to the memory, and read instructions in the memory, and implement the above method according to the instructions.

In yet another possible implementation manner, the structure of the communication device includes a transceiver for implementing the above communication method.

When the communication device is a chip, the transceiver unit may be an input/output unit, such as an input/output circuit or a communication interface. When the communication apparatus is a network device, the transceiver unit may be a transmitter/receiver (also referred to as a transmitter/receiver).

In a sixth aspect, a computer-readable storage medium is provided, where computer programs or instructions are stored in the computer-readable storage medium, and when the computer programs or instructions are executed, the methods described in the above aspects are implemented.

In a seventh aspect, there is provided a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the methods described in the above aspects.

Description of drawings

Fig. 1 is the schematic diagram of TB division;

2 is a schematic diagram of a communication system involved in the application;

3 is a schematic flowchart of a communication method provided by an embodiment of the present application;

4 is a schematic flowchart of another communication method provided by an embodiment of the present application;

5 is a schematic flowchart of another communication method provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a simplified terminal device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a simplified network device provided by an embodiment of the present application.

Detailed ways

The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

FIG. 2 is a schematic diagram of a communication system involved in the present application. The communication system may include one or more network devices 100 (only one is shown) and one or more terminal devices 200 connected to the network device 100 .

The network device 100 may be a device capable of communicating with the terminal device 200 . The network device 100 may be any device with a wireless transceiver function. Including but not limited to: base station (NodeB), evolved base station (eNodeB), base station in fifth generation (the fifth generation, 5G) communication system, base station or network device in future communication system, access node in WiFi system, Wireless relay nodes, wireless backhaul nodes, etc. The network device 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device 100 may also be a small station, a transmission reference point (TRP), or the like. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

The terminal device 200 is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water, such as ships; it can also be deployed in the air, such as aircraft , balloons, and satellites. The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, an industrial control ( Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety Wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiments of the present application do not limit application scenarios. Terminal equipment may also sometimes be referred to as user equipment (UE), access terminal equipment, UE unit, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, terminal, wireless communication device, UE Proxy or UE device etc.

It should be noted that the terms "system" and "network" in the embodiments of the present invention may be used interchangeably. "Plurality" refers to two or more than two, and in view of this, in the embodiment of the present invention, "plurality" may also be understood as "at least two". "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the related objects are an "or" relationship.

The present application provides a communication method and device, which can flexibly determine the number of CBGs used to generate feedback signaling according to the time domain characteristics of the PDSCH, thereby reducing the size of the feedback signaling and improving system transmission efficiency.

FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application. The method may include the following steps:

S101. Determine the first CBG number according to the time domain characteristic of the physical downlink shared channel PDSCH.

The size of the feedback signaling of one TB is related to the number of CBGs. In the prior art, the network sends a parameter for generating the maximum number of CBGs of the ACK/NACK feedback signaling code block, which is called the third CBG number. In the prior art, the size of the feedback signaling of one TB is based on the Three CBG numbers to determine. The network notifies the UE of the third CBG number through high layer signaling, and the maximum value is 8. If the third CBG number is 8, it means that one TB needs 8-bit feedback signaling.

In downlink communication, the TB is carried and transmitted on a physical downlink shared channel (PDSCH). The number of symbols occupied by the PDSCH carrying the TB may be different (some TBs are large, the number of occupied symbols is large, and some TBs are small, the number of occupied symbols is small); the length and start of the symbols occupied by the PDSCH carrying the TB Location may vary. Therefore, in a time slot, the number of TBs that can be carried is related to the time domain characteristics of the PDSCH carrying the TBs. If the shortest number of symbols of a PDSCH is 2, a slot can have up to 7 PDSCHs, and each PDSCH can carry 1-2 TBs. Usually, the ACK/NACK signaling of multiple TBs is fed back in one time slot, and these feedback signalings form a feedback signaling codebook. The size of the feedback signaling codebook is determined by the data of several time slots that need to be fed back in the codebook, the number of PDSCHs contained in each time slot, the number of TBs contained in each PDSCH, and the number of TBs corresponding to each TB. The number of CBGs for generating feedback signaling, the number of carriers to be fed back contained in a codebook, and other factors are determined. If one slot contains too many PDSCHs, the feedback code cost increases exponentially. On the other hand, since the size of each TB is different, the number of CBGs configured in the network is used to divide the TBs. Small TBs will also have multiple CBGs, which require the same number of bits as the large TBs for feedback, which increases the system's capacity. Therefore, in this application, the number of CBGs used for generating feedback signaling, that is, the first number of CBGs, is determined according to the time domain characteristics of the PDSCH. The time domain characteristics of PDSCH include related parameter settings in the time domain of PDSCH, including the time domain resource allocation method of PDSCH, the symbol length of the PDSCH time domain, the symbol length of the PDSCH time domain, the starting position of the time domain, and the mapping of PDSCH. type, carrying time slot of PDSCH, etc. In this application, we will refer to the maximum number of CBGs used to generate feedback signaling as the first CBG number, or the first maximum CBG number.

Time domain characteristics of PDSCH, including configuration and parameters related to PDSCH time domain. For example, the configuration and parameters related to the PDSCH time domain can be represented by the time domain resource allocation table of the PDSCH. Table 1 below is a specific example of one of the PDSCH time domain resource allocation tables. A time domain resource allocation table includes multiple rows, each row uses a row index (row index) to indicate the time domain resource allocation parameters of PDSCH, including PDSCH mapping type (PDSCH mapping type), PDSCH start and length indication value ( start and length indicator value, SLIV) identification, the time slot offset K ₀ of the PDSCH, the position of the demodulation reference signal (DMRS position) of the PDSCH, and the like. Wherein, the SILV includes S and L, where S represents the start symbol of the PDSCH, and L represents the length of the scheduled PDSCH.

Table 1 Example of PDSCH time domain resource allocation table

The mapping types of the PDSCH include the mapping type type A and the mapping type type B, which are used to define the starting position and length of the PDSCH. Depending on the type of the cyclic prefix (CP), it has different meanings, as shown in Table 2 below. Wherein, S represents the starting symbol number of the PDSCH, and L represents the length of the PDSCH. The types of CP include normal cyclic prefix and extended cyclic prefix.

Table 2

The time domain characteristics of the PDSCH may also include parameters related to the frame structure of the PDSCH. The parameters related to the frame structure of the PDSCH include the length of the time slot of the PDSCH, the length of the cyclic preamble CP of the PDSCH, the subcarrier spacing of the PDSCH, the number of symbols included in a time slot of the PDSCH, and the like.

根据第二CBG数，确定第一CBG数

使得第一CBG数等于第二CBG数，即

The first CBG number is determined according to the time domain characteristics of the PDSCH. The first specific implementation method is: determining the second CBG number according to the time domain characteristics of the physical downlink shared channel PDSCH

Determine the first CBG number according to the second CBG number

Make the first CBG number equal to the second CBG number, that is

根据第二CBG数和第三CBG数

确定第一CBG数

使得第一CBG数等于第二CBG数和第三CBG数之间的较小值，即

其中，第三CBG数为网络配置的高层参数，例如在高层参数maxCodeBlockGroupsPerTransportBlock。该参数用于指示在一个小区中的传输块TB的最大CBG个数，取值为1-8之中的自然数。The first CBG number is determined according to the time domain characteristics of the PDSCH. The second specific implementation method is: determining the second CBG number according to the time domain characteristics of the PDSCH

According to the second CBG number and the third CBG number

Determining the first CBG number

Make the first CBG number equal to the smaller value between the second CBG number and the third CBG number, i.e.

The third CBG number is a high-level parameter configured by the network, for example, the high-level parameter maxCodeBlockGroupsPerTransportBlock. This parameter is used to indicate the maximum number of CBGs of the transport block TB in one cell, and the value is a natural number from 1 to 8.

Further, determining the first CBG number according to the time domain characteristic of the PDSCH includes determining the first CBG number according to the type of the feedback signaling codebook.

或

对于第二类型反馈码本，

其中根据反馈信令码本的类型确定第一CBG数。One specific embodiment is that, for the first type of feedback code block, the first CBG number is equal to the smaller value between the second CBG number and the third CBG number, or the first CBG number is equal to the second CBG number, that is

or

For the second type of feedback codebook,

The first CBG number is determined according to the type of the feedback signaling codebook.

或

The second specific embodiment is, for the first type of feedback codebook and the second type of feedback codebook, the first CBG number is equal to the smaller value between the second CBG number and the third CBG number, or the first CBG number number is equal to the second CBG number, i.e.

or

The feedback codebook type is the high-level parameter pdsch-HARQ-ACK-codebook configured by the network. If pdsch-HARQ-ACK-codebook=semi-static, the feedback codebook type is the first type feedback codebook type-1 HARQ-ACK codebook, also called semi-static HARQ-ACK codebook; if pdsch-HARQ-ACK -codebook=dynamic, the feedback codebook type is the second type feedback codebook type-2 HARQ-ACK codebook, also called dynamic HARQ-ACK codebook. The size of the feedback signaling of the first type of codebook is based on the number of the first CBG, the number of PDSCHs contained in one time slot, the number of PDSCH time slots for which several time slots need to be fed back in one feedback signaling codebook, and the number of PDSCHs in one feedback signaling codebook. Let the number of codebook constituent carriers be determined, and the size of the feedback signaling of the second type codebook is based on the number of the first CBG, the maximum number of HARQ processes that need to be fed back in one feedback signaling, and the number of feedback signals that need to be fed back in one feedback signaling codebook. The number of time slots of PDSCH and one feedback signaling codebook are related to the number of carriers. The first CBG number is determined in different ways for the first type codebook and the second type codebook respectively, which can increase more flexibility.

Further, determining the first CBG number according to the time domain characteristic of the physical downlink shared channel PDSCH includes determining the first CBG number according to the transmission mode of the bearer feedback signaling. Specifically, if the feedback signaling is transmitted on the physical uplink control channel (PUCCH), that is, the feedback signaling is transmitted in a multiplexed transmission manner with the PUSCH, that is, the feedback signaling is carried on the PUSCH , then the first CBG is equal to the third CBG; if the feedback signaling is transmitted on the physical uplink shared channel (PUSCH), then the first CBG is equal to the second CBG, or the first CBG is equal to the second CBG and the first CBG The smaller of the three CBGs. Since the processing resources used by the PUCCH and the PUSCH are different, the first CBG number is determined according to the transmission mode of the bearer feedback signaling, which can increase more implementation flexibility.

其中一种具体实现方式为：Determine the second CBG number according to the time domain characteristics of the PDSCH

One of the specific implementation methods is:

- According to the time domain characteristic of PDSCH, determine the first time domain resource number M;

- Determine the second CBG number according to the first time domain resource number M.

The first implementation manner of determining the number M of the first time domain resources according to the time domain characteristics of the PDSCH is: determining M according to the subcarrier spacing of the PDSCH. For example, when the subcarrier spacing of PDSCH is 15kHz, M=7; when the subcarrier spacing of PDSCH is 30kHz, M=4; when the subcarrier spacing of PDSCH is 60kHz, M=2; when the subcarrier spacing of PDSCH is 120kHz, M =1. Or M is determined according to the subcarrier spacing of the PDSCH and the capability of the terminal device. For example, if the capability of the terminal device is that one time slot can only receive one dedicated PDSCH, then M=1; if the capability of the terminal device is that one time slot can only receive two dedicated PDSCHs, then M=2. The maximum number of received PDSCHs that the terminal device can support in different subcarrier intervals may take different values according to the subcarrier intervals of the PDSCH.

The second implementation of determining the number M of the first time domain resources according to the time domain characteristics of the PDSCH is as follows: according to the time domain resource configuration table of the PDSCH, the first number M of time domain resources is calculated and obtained, that is, one time slot can be scheduled The maximum number of PDSCHs. That is, the potential of the following set B, also called the number of elements in the set B, is expressed by a formula as M=C(B), and the first CBG number is determined according to the first time domain resource number M. For a specific way of determining one of the set B, reference may be made to 3GPP TS38.213vF.3.0. The embodiments of the present application are briefly described as follows:

According to the PDSCH time domain resource allocation table (PDSCH-TimeDomainResourceAllocationList) of PDSCH-ConfigCommon of high-level parameters, or the default (default) PDSCH time-domain resource allocation table A, or the PDSCH time-domain resource allocation table in the high-level parameter PDSCH-Config ( PDSCH-TimeDomainResourceAllocationList), and under the current configuration conditions, determine the row index set R of the PDSCH time domain resource allocation table that can be used for scheduling PDSCH, and then determine the set B according to the set R. specific:

First, the time domain symbols corresponding to all SLIVs in the set R are determined, and the SLIVs whose corresponding symbols include uplink symbols are removed, so that all the SLIVs corresponding to the row indices in the new set R obtained in this way are available.

If the UE is capable of receiving multiple PDSCHs in one time slot, a maximum value of PDSCHs that can be received is determined according to the row index of the set R. For a certain time slot k, the specific method is as follows:

1. First determine the smallest one of the last OFDM symbols in the SLIV corresponding to all the row indices of the set R, denoted as m;

为集合R的元素个数，从

的最小索引r开始，如果r对应的SLIV中起始符号小于等于m，则将和该行索引r相应的可能会接收PDSCH或者SPS PDSCH release的位置记为j，令b_r,k等于j，并将该行索引r从集合R中去除，将b_r,k并入集合B；2. Remember

is the number of elements in the set R, from

Start with the minimum index r of r. If the starting symbol in the SLIV corresponding to r is less than or equal to m, the position corresponding to the row index r that may receive PDSCH or SPS PDSCH release is recorded as j, and let b _{r, k} equal to j, And remove the row index r from set R, and merge _br,k into set B;

3. Traverse all row indices in set R to obtain multiple _br,k equal to j, remove the corresponding row index r from set R, and merge multiple _br,k into set B;

4. Obtain a new set R, and re-determine the smallest one of the last OFDM symbols in the SLIV corresponding to all row indices of the new set R, denoted as m. Repeat the cycle from the second step until the set R becomes an empty set;

5. In the position where multiple row indices corresponding to the same value _br,k in the obtained set B may receive PDSCH or SPS PDSCH release, the UE does not expect to receive more than one PDSCH in the same time slot .

The second CBG number is determined according to the first time domain resource number M, where the first specific implementation manner is:

Determine the second CBG number according to the first time domain resource number M, where the second specific implementation manner is:

The second number of CBGs is determined according to the number M of the first time domain resources, and the third specific implementation manner is:

The second CBG number is determined according to the first time domain resource number M, where the fourth specific implementation manner is:

The second CBG number is determined according to the first time-domain resource number M, where the fifth specific implementation manner is:

为第四CBG参数，取值可以是定好的常数，例如其值可以是4或者8。

为第五CBG参数，取值可以是定好的常数，例如1。本申请的所有公式中，

表示向上取整；

表示向下取整。in,

For the fourth CBG parameter, the value may be a predetermined constant, for example, the value may be 4 or 8.

For the fifth CBG parameter, the value can be a predetermined constant, such as 1. In all formulas in this application,

means round up;

Indicates rounded down.

The second CBG number is determined according to the first time-domain resource number M, where a sixth specific implementation manner is: determining the second CBG number according to the mapping relationship between M and the CBG number. This mapping relationship is that the larger M is, the smaller the corresponding second CBG number is. This mapping relationship can be represented in the form of a table, a specific example of which is shown in Table 3 below.

Table 3 Mapping table between M and the second CBG number

其中第二种具体实现方式为：Determine the second CBG number according to the time domain characteristics of the PDSCH

The second specific implementation method is:

The second CBG number is determined according to the symbol length L in the PDSCH time domain.

其中第一种具体的实施方法为：

Determine the second CBG number according to the symbol length L in the PDSCH time domain

The first specific implementation method is:

其中第二种具体的实施方法为：

Determine the second CBG number according to the symbol length L in the PDSCH time domain

The second specific implementation method is:

其中第三种具体的实施方法为：

Determine the second CBG number according to the symbol length L in the PDSCH time domain

The third specific implementation method is:

其中第四种具体的实施方法为：

Determine the second CBG number according to the symbol length L in the PDSCH time domain

The fourth specific implementation method is:

其中第五种具体的实施方法为：

Determine the second CBG number according to the symbol length L in the PDSCH time domain

The fifth specific implementation method is:

Among them, L is the number of OFDM symbols occupied by the PDSCH carrying the TB, S is the length of the OFDM symbols in a time slot, or the number of OFDM symbols included in a time slot, n is the number of repetitions or aggregations of a PDSCH, n=1 means that the PDSCH is not repeated or aggregated.

其中第六种具体的实现方式为：根据M与CBG数的映射关系，确定第二CBG数。这种映射关系为，L越大，对应的第二CBG数越大。这种映射关系可以以表格的形式来体现，其中两种具体的例子如下表4和表5。Determine the second CBG number according to the symbol length L in the PDSCH time domain

The sixth specific implementation manner is: determining the second CBG number according to the mapping relationship between M and the CBG number. This mapping relationship is that the larger the L, the larger the corresponding second CBG number. This mapping relationship can be embodied in the form of a table, two specific examples of which are shown in Table 4 and Table 5 below.

Table 4 Example 1 of the mapping table between L and the second CBG number

Table 5 Example 1 of the mapping table between L and the second CBG number

其中第三种具体实现方式为：Determine the second CBG number according to the time domain characteristics of the PDSCH

The third specific implementation method is:

Determine the mapping type of PDSCH according to the time domain characteristics of PDSCH;

The second CBG number is determined according to the type of PDSCH.

Specifically, if the PDSCH is type A, the second CBG number is equal to the third CBG number; if the PDSCH is type B, the first CBG number is the fifth CBG number, or CBG is not supported, or the aforementioned PDSCH The value of the second CBG number is determined by means of the time-domain symbol length. At this time, the value of the PDSCH time-domain symbol length L can be 2, 4, and 7 for a normal CP, and 2, 4, and 6 for an extended CP. .

S102. Determine the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the first CBG number.

比特来反馈其ACK/NACK。For one TB, the size of its feedback signaling is equal to the first CBG number, that is, one TB uses

bit to feed back its ACK/NACK.

S103. Determine the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel.

根据第一CBG数

和一个TB的实际码块CB的数量C来确定，具体为：

根据接收到的TB中所包含的

个CBG的译码情况，确定该CBG的ACK/NACK反馈信令，每个CBG对应1比特的反馈信令。如果接收端成功接收并译码出该TB中的某个CBG，则反馈ACK；如果接收端未成功接收并译码出TB中的某个CBG，则反馈NACK。如果

小于第一CBG数

则剩余比特用NACK填充。The actual number of CBGs contained in a TB

According to the first CBG number

Determined by the number C of the actual code block CB of a TB, specifically:

According to the received TB contained in

The decoding situation of each CBG determines the ACK/NACK feedback signaling of the CBG, and each CBG corresponds to 1-bit feedback signaling. If the receiver successfully receives and decodes a certain CBG in the TB, it feeds back an ACK; if the receiver fails to receive and decode a certain CBG in the TB, it feeds back a NACK. if

less than the first CBG number

Then the remaining bits are filled with NACK.

The feedback signaling of one or more TBs constitutes an ACK/NACK feedback signaling codebook.

S104. Send the feedback signaling.

The feedback signaling is sent to the receiving end of the feedback signaling, and the size of one TB feedback signaling is the size of the feedback signaling determined above. An ACK/NACK feedback signaling codebook contains the feedback signaling of all TBs that need to be fed back in the feedback signaling codebook.

According to a communication method provided by the embodiments of the present application, the number of CBGs used to generate feedback signaling can be flexibly determined according to the time domain characteristics of PDSCH, thereby reducing the size of feedback signaling and improving system transmission efficiency. For example, if a time slot includes 7 PDSCHs, and if the length of each PDSCH is 2 symbols, according to the method of the present invention, at this time, each TB has at most 1 CBG, and the corresponding number of feedback bits is 7 (TB)*1(CBG)*K1*CC, where K1 is used to indicate the number of time slots to be fed back in a feedback codebook, for example, K1=8, CC is the number of carriers, taking 4CC as an example, the total number of bits is 7*1*8*4=224. Compared with the original fixed 1792 bits, the overhead of feedback signaling is greatly reduced, and the transmission efficiency of the system is improved. At the same time, the feedback signaling of 224 bits does not need to be divided into two code blocks for transmission, which reduces the transmission of feedback signaling. The coding complexity of the device and the decoding complexity of the device receiving the feedback signaling.

FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application. The method may include the following steps:

S201. Determine the value of a parameter for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel.

Usually, multiple feedback signalings fed back in one time slot are combined into one feedback signaling codebook for transmission. There are two types of feedback codebooks, the first type feedback codebook type-1 HARQ-ACK codebook, also known as semi-static HARQ-ACK codebook; and the second type feedback codebook type-2 HARQ-ACK codebook, also known as It is called dynamic HARQ-ACK codebook.

一个时隙中包含的PDSCH的数量

一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、一个反馈信令码本中反馈的组成载波的个数N_CC。For the first type of feedback codebook, the parameter for calculating the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel includes: the number of the first CBG

The number of PDSCHs contained in a slot

One feedback signaling codebook needs to feed back the number N _slot of PDSCH of several time slots, and the number N _CC of component carriers fed back in one feedback signaling codebook.

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ、一个反馈信令码本中反馈的组成载波的个数N_CC。For the second type of feedback codebook, the parameter for calculating the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel includes: the number of the first CBG

The maximum number of HARQ processes that needs to be fed back in one feedback signaling, N _HARQ , and the number of component carriers N _CC fed back in one feedback signaling codebook.

一个时隙中包含的PDSCH的数量

一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得O_ACK不超过第一阈值。Determine the value of the parameter used to calculate the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel, where a specific implementation is, for the first type of codebook, determine the first CBG number

The number of PDSCHs contained in a slot

One feedback signaling codebook needs to feed back the number of PDSCH time slots N _slot of several time slots, and the number N _CC of component carriers fed back in one feedback signaling codebook, so that O _ACK does not exceed the first threshold.

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得O_ACK不超过第一阈值。Determine the value of the parameter used to calculate the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel.

The maximum number of HARQ processes N _HARQ to be fed back in one feedback signaling, and the number N _CC of component carriers fed back in one feedback signaling codebook, so that O _ACK does not exceed the first threshold.

The first threshold is used to represent the maximum value of the feedback signaling codebook, which may be a parameter configured by the network, or the number of capabilities reported by the terminal, or an agreed value, such as 360 or 359. Further, according to the transmission mode of the feedback signaling, the first threshold may take different values. For example, if the feedback signaling is transmitted on the PUCCH, the first threshold is 1706, and if the feedback signaling is transmitted on the PUSCH, the first threshold is 360 or 359. Setting the first threshold when transmitting on the PUSCH is smaller than the first threshold when transmitting on the PUCCH, so that more resources can be reserved for the PUSCH. The first threshold may take different values according to the codebook type, or may take the same value. The first threshold may be a number, or may be more than one parameter selected according to different parameter configurations.

一个时隙中包含的PDSCH的数量

一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得按照公式

计算得到的O_ACK不超过第一阈值。对于第二类型码本的反馈信令，确定第一CBG数

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得按照公式

计算得到的O_ACK不超过第一阈值。The specific determination method is, according to the first threshold, for the codebook of the first type, determine the first CBG number

The number of PDSCHs contained in a slot

A feedback signaling codebook needs to feed back the number of PDSCH time slots N _slot of several time slots, and the number N _CC of component carriers fed back in a feedback signaling codebook, so that according to the formula

The calculated O _ACK does not exceed the first threshold. For the feedback signaling of the codebook of the second type, determine the first CBG number

The maximum number of HARQ processes N _HARQ that needs to be fed back in a feedback signaling, and the number of component carriers N _CC fed back in a feedback signaling codebook, so that according to the formula

The calculated O _ACK does not exceed the first threshold.

一个时隙中包含的PDSCH的数量

以使得

小于第二阈值；对于第二类型反馈码本，确定第一CBG数

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ，以使得

小于第三阈值。第二阈值可以是网络配置的参数，还可以是根据终端能力上报的能力参数，还可以是确定的数值，例如第二阈值为16。第二阈值可以根据码本类型取不同的值，还可以取相同的值。第二阈值可以是一个数，还可以是根据不同的参数配置选择为多于一个的参数。第三阈值可以是网络配置的参数，还可以是根据终端能力上报的能力参数，还可以是确定的数值，例如第三阈值为56。第三阈值可以根据码本类型取不同的值，还可以取相同的值。第三阈值可以是一个数，还可以是根据不同的参数配置选择为多于一个的参数。Determine the value of the parameter used to calculate the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel, where the second specific implementation is, for the first type of feedback codebook, determine the first CBG number

The number of PDSCHs contained in a slot

to make

less than the second threshold; for the second type of feedback codebook, determine the first CBG number

The maximum number of HARQ processes that need to be fed back in one feedback signaling, N _HARQ , so that

less than the third threshold. The second threshold may be a parameter configured by the network, a capability parameter reported according to the terminal capability, or a determined value, for example, the second threshold is 16. The second threshold may take different values according to the codebook type, or may take the same value. The second threshold may be a number, or may be more than one parameter selected according to different parameter configurations. The third threshold may be a parameter configured by the network, a capability parameter reported according to the terminal capability, or a determined value, for example, the third threshold is 56. The third threshold may take different values according to the codebook type, or may take the same value. The third threshold may be a number, or may be more than one parameter selected according to different parameter configurations.

S202. Send the value of the parameter for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel to the terminal device.

According to a communication method provided by an embodiment of the present application, by sending a value of a parameter used to calculate the size of feedback signaling of a transport block carried in a physical downlink shared channel to a terminal device, the terminal device determines the feedback signal according to the above parameters. The size of the signaling codebook does not exceed the threshold, thereby reducing the size of feedback signaling and improving system transmission efficiency.

FIG. 5 is a schematic flowchart of still another communication method provided by an embodiment of the present application. The method may include the following steps:

S301. Determine the size of the feedback signaling of the transport block carried in the physical downlink shared channel.

Usually, multiple feedback signalings fed back in one time slot are combined into one feedback signaling codebook for transmission. There are two types of feedback codebooks, the first type feedback codebook type-1 HARQ-ACK codebook, also known as semi-static HARQ-ACK codebook, and the second type feedback codebook type-2 HARQ-ACK codebook, also known as It is called dynamic HARQ-ACK codebook.

一个时隙中包含的PDSCH的数量

一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、一个反馈信令码本中反馈的组成载波的个数N_CC,确定第一类型码本的反馈信令的大小O_ACK，具体的，

根据第一CBG数

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ、一个反馈信令码本中反馈的组成载波的个数有关N_CC，确定第二类型码本的反馈信令的大小

Specifically, according to the first CBG number

The number of PDSCHs contained in a slot

In one feedback signaling codebook, the number of PDSCH time slots N _slot of which several time slots need to be fed back, and the number N _CC of component carriers fed back in one feedback signaling codebook, determine the number of feedback signaling of the first type codebook. size O _ACK , specifically,

According to the first CBG number

The maximum number of HARQ processes that need to be fed back in one feedback signaling, N _HARQ , and the number of component carriers fed back in one feedback signaling codebook are related to N _CC , which determines the size of the feedback signaling of the second type codebook

一个时隙中包含的PDSCH的数量

一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得O_ACK不超过第一阈值。确定用于计算物理下行共享信道中承载的传输块TB的反馈信令的大小，对于第二类型码本的反馈信令，具体为，确定第一CBG数

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得O_ACK不超过第一阈值。Determine the size of the feedback signaling used to calculate the transport block TB carried in the physical downlink shared channel, and for the feedback signaling of the codebook of the first type, specifically, determine the first CBG number

The number of PDSCHs contained in a slot

One feedback signaling codebook needs to feed back the number of PDSCH time slots N _slot of several time slots, and the number N _CC of component carriers fed back in one feedback signaling codebook, so that O _ACK does not exceed the first threshold. Determine the size of the feedback signaling used to calculate the transport block TB carried in the physical downlink shared channel, and for the feedback signaling of the codebook of the second type, specifically, determine the first CBG number

The maximum number of HARQ processes N _HARQ to be fed back in one feedback signaling, and the number N _CC of component carriers fed back in one feedback signaling codebook, so that O _ACK does not exceed the first threshold.

The first threshold is used to represent the maximum value of the feedback signaling codebook, which may be a parameter configured by the network, or the number of capabilities reported by the terminal, or an agreed value, such as 360 or 359. Further, according to the transmission mode of the feedback signaling, the first threshold may take different values. For example, if the feedback signaling is transmitted on the PUCCH, the first threshold is 1706, and if the feedback signaling is transmitted on the PUSCH, the first threshold is 360 or 359. Setting the first threshold when transmitting on the PUSCH is smaller than the first threshold when transmitting on the PUCCH, so that more resources can be reserved for the PUSCH. A threshold can take different values according to the codebook type, and can also take the same value. The first threshold may be a number, or may be more than one parameter selected according to different parameter configurations.

一个时隙中包含的PDSCH的数量

一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得按照公式

计算得到的O_ACK不超过第一阈值。对于第二类型码本的反馈信令，确定第一CBG数

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ、一个反馈信令码本中反馈的组成载波的个数N_CC,以使得按照公式

计算得到的O_ACK不超过第一阈值。The specific determination method is, according to the first threshold, for the feedback signaling of the codebook of the first type, determine the first number of CBGs

The number of PDSCHs contained in a slot

A feedback signaling codebook needs to feed back the number of PDSCH time slots N _slot of several time slots, and the number N _CC of component carriers fed back in a feedback signaling codebook, so that according to the formula

The calculated O _ACK does not exceed the first threshold. For the feedback signaling of the codebook of the second type, determine the first CBG number

The maximum number of HARQ processes N _HARQ that needs to be fed back in a feedback signaling, and the number of component carriers N _CC fed back in a feedback signaling codebook, so that according to the formula

The calculated O _ACK does not exceed the first threshold.

一个时隙中包含的PDSCH的数量

以使得

小于第二阈值；对于第二类型反馈码本，确定第一CBG数

一个反馈信令中需要反馈的最大HARQ进程数N_HARQ，以使得

小于第三阈值。第二阈值可以是网络配置的参数，还可以是根据终端能力上报的能力参数，还可以是确定的数值，例如第二阈值为16。第二阈值可以根据码本类型取不同的值，还可以取相同的值。第二阈值可以是一个数，还可以是根据不同的参数配置选择为多于一个的参数。第三阈值可以是网络配置的参数，还可以是根据终端能力上报的能力参数，还可以是确定的数值，例如第三阈值为56。第三阈值可以根据码本类型取不同的值，还可以取相同的值。第三阈值可以是一个数，还可以是根据不同的参数配置选择为多于一个的参数。Determining the size of the feedback signaling of the transport block carried in the physical downlink shared channel, where another implementation manner is, for the first type of feedback codebook, determining the first number of CBGs

The number of PDSCHs contained in a slot

to make

less than the second threshold; for the second type of feedback codebook, determine the first CBG number

The maximum number of HARQ processes that need to be fed back in one feedback signaling, N _HARQ , so that

less than the third threshold. The second threshold may be a parameter configured by the network, a capability parameter reported according to the terminal capability, or a determined value, for example, the second threshold is 16. The second threshold may take different values according to the codebook type, or may take the same value. The second threshold may be a number, or may be more than one parameter selected according to different parameter configurations. The third threshold may be a parameter configured by the network, a capability parameter reported according to the terminal capability, or a determined value, for example, the third threshold is 56. The third threshold may take different values according to the codebook type, or may take the same value. The third threshold may be a number, or may be more than one parameter selected according to different parameter configurations.

S302. Determine the feedback signaling of the transport block carried in the physical downlink shared channel according to the size of the feedback signaling of the transport block carried in the physical downlink shared channel.

比特来反馈其ACK/NACK。根据第一CBG数

和一个TB的实际码块CB的数量C，确定TB所包含的实际CBG的数量

具体为：

For one TB, the size of its feedback signaling is equal to the first CBG number, that is, one TB uses

bit to feed back its ACK/NACK. According to the first CBG number

and the number C of the actual code block CB of a TB to determine the number of actual CBGs contained in the TB

Specifically:

个CBG的译码情况，确定该CBG的ACK/NACK反馈信令，每个CBG对应1比特的反馈信令。如果接收端成功接收并译码出该TB中的某个CBG，则反馈ACK；如果接收端未成功接收并译码出TB中的某个CBG，则反馈NACK。如果

小于第一CBG数，则剩余比特用NACK填充。According to the received TB contained in

The decoding situation of each CBG determines the ACK/NACK feedback signaling of the CBG, and each CBG corresponds to 1-bit feedback signaling. If the receiver successfully receives and decodes a certain CBG in the TB, it feeds back an ACK; if the receiver fails to receive and decode a certain CBG in the TB, it feeds back a NACK. if

Less than the first CBG number, the remaining bits are filled with NACK.

The feedback signaling of one or more TBs constitutes an ACK/NACK feedback signaling codebook.

Further, if the size of the feedback signaling codebook is greater than the first threshold, all signaling in the feedback signaling codebook is NACK. At this time, the terminal device may not decode all the TBs fed back in the feedback signaling codebook.

S303. Send the feedback signaling.

The feedback signaling is sent to the receiving end of the feedback signaling, and the size of one TB feedback signaling is the size of the feedback signaling determined above. An ACK/NACK feedback signaling codebook contains the feedback signaling of all TBs that need to be fed back in the feedback signaling codebook.

Further, if the size of the feedback signaling codebook is smaller than the first threshold, the feedback signaling is sent, and if the size of the feedback signaling codebook is larger than the first threshold, the feedback signaling is not sent.

或一个时隙中包含的PDSCH的数量

或一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、或一个反馈信令码本中反馈的组成载波的个数N_CC,或一个反馈信令中需要反馈的最大HARQ进程数N_HARQ，使得反馈信令码本的大小不超过第一阈值，从而可以减少反馈信令的大小，提高系统传输效率。例如，若第一阈值为360比特，则反馈信令不超过360比特，相对于原来固定的1792比特，大大减少了反馈信令的开销，提升了系统传输效率，同时360比特的反馈信令，也不需要分给为两个码块来传输，降低了发送反馈信令的设备的编码复杂度和接收反馈信令的设备的译码复杂度。Using the embodiments of the present invention, by adjusting the first CBG number of the TB in a feedback signaling codebook

or the number of PDSCHs contained in a slot

Or the number of PDSCH time slots N _slot that needs to be fed back several time slots in a feedback signaling codebook, or the number N CC of component carriers fed back in a feedback signaling codebook, or the number N _CC that needs to be fed back in a feedback signaling codebook. The maximum number of HARQ processes, N _HARQ , ensures that the size of the feedback signaling codebook does not exceed the first threshold, thereby reducing the size of the feedback signaling and improving system transmission efficiency. For example, if the first threshold is 360 bits, the feedback signaling does not exceed 360 bits. Compared with the original fixed 1792 bits, the overhead of feedback signaling is greatly reduced, and the system transmission efficiency is improved. It also does not need to be divided into two code blocks for transmission, which reduces the coding complexity of the device that sends the feedback signaling and the decoding complexity of the device that receives the feedback signaling.

或一个时隙中包含的PDSCH的数量

或一个反馈信令码本中需要反馈几个时隙的PDSCH的时隙数N_slot、或一个反馈信令码本中反馈的组成载波的个数N_CC,或一个反馈信令中需要反馈的最大HARQ进程数N_HARQ，使得反馈信令码本的大小不超过第一阈值，从而可以减少反馈信令的大小，提高系统传输效率。例如，若第一阈值为360比特，则反馈信令不超过360比特，相对于原来固定的1792比特，大大减少了反馈信令的开销，提升了系统传输效率，同时360比特的反馈信令，也不需要分给为两个码块来传输，降低了发送反馈信令的设备的编码复杂度和接收反馈信令的设备的译码复杂度。上述详细阐述了本发明实施例的方法，下面提供了本发明实施例的装置。Using the embodiments of the present invention, by adjusting the first CBG number of the TB in a feedback signaling codebook

or the number of PDSCHs contained in a slot

Or the number of PDSCH time slots N _slot that needs to be fed back several time slots in a feedback signaling codebook, or the number N CC of component carriers fed back in a feedback signaling codebook, or the number N _CC that needs to be fed back in a feedback signaling codebook. The maximum number of HARQ processes, N _HARQ , ensures that the size of the feedback signaling codebook does not exceed the first threshold, thereby reducing the size of the feedback signaling and improving system transmission efficiency. For example, if the first threshold is 360 bits, the feedback signaling does not exceed 360 bits. Compared with the original fixed 1792 bits, the overhead of feedback signaling is greatly reduced, and the system transmission efficiency is improved. It also does not need to be divided into two code blocks for transmission, which reduces the coding complexity of the device that sends the feedback signaling and the decoding complexity of the device that receives the feedback signaling. The method of the embodiment of the present invention is described in detail above, and the apparatus of the embodiment of the present invention is provided below.

Based on the same concept of the communication method in the foregoing embodiment, as shown in FIG. 6 , an embodiment of the present application further provides a communication apparatus 1000 , which can be applied to the communication method shown in the foregoing FIG. 3 . The communication apparatus 1000 may be the terminal device 200 shown in FIG. 2 , or may be a component (eg, a chip) applied to the terminal device 200 , or may be the network device 100 shown in FIG. 2 , or may be an application a component (eg, a chip) of the network device 100 . The communication device 1000 includes a processing unit 11 and a sending unit 12 . in:

The processing unit 11 is configured to determine the first CBG number according to the time domain characteristics of the physical downlink shared channel PDSCH;

The processing unit 11 is further configured to determine the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the first CBG number;

The processing unit 11 is further configured to determine the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel;

The sending unit 12 is configured to send the feedback signaling.

In an implementation manner, the processing unit 11 is used for:

determining the second CBG number according to the time domain characteristic of the PDSCH;

According to the second CBG number, the first CBG number is determined.

In another implementation manner, the processing unit 11 is configured to: determine a first CBG number according to the second CBG number, where the first CBG number is equal to the second CBG number.

In yet another implementation manner, the processing unit 11 is configured to: determine a first CBG number according to the second CBG number and the third CBG number, where the first CBG number is the second CBG number and the third CBG number The smaller value among the three CBG numbers, where the third CBG number is a parameter configured by the network.

In yet another implementation manner, the processing unit 11 is configured to: determine the first CBG number according to the feedback codebook type.

In yet another implementation manner, the processing unit 11 is configured to:

For the first type of feedback codebook, the first CBG number is equal to the second CBG number, or the first CBG number is the smaller of the second CBG number and the third CBG number, wherein the The third CBG number is a parameter configured by the network;

For the second type of feedback codebook, the first CBG number is equal to the second CBG number, or the first CBG number is equal to the third CBG number.

In yet another implementation manner, the processing unit 11 is configured to:

Determine the first time domain resource number according to the time domain characteristic of the PDSCH;

The second number of CBGs is determined according to the number of the first time domain resources.

In yet another implementation manner, the processing unit 11 is configured to: determine the second CBG number according to the mapping type of the PDSCH.

In yet another implementation manner, the processing unit 11 is configured to:

When the mapping type of the PDSCH is type A, determining that the second CBG number is the third CBG number;

When the PDSCH mapping type is type B, the second CBG number is determined to be the fifth CBG number.

In yet another implementation manner, the processing unit 11 is further configured to: determine the number of CBGs in the TB carried in the PDSCH according to the first CBG number.

In yet another implementation manner, the sending unit 12 is configured to send the feedback signaling in a manner of multiplexing and transmission with the PUSCH.

More detailed descriptions about the above processing unit 11 and the sending unit 12 can be obtained directly by referring to the relevant descriptions in the method embodiment shown in FIG. 3 , and details are not repeated here.

Based on the same concept of the communication method in the above embodiment, as shown in FIG. 7 , an embodiment of the present application further provides a communication apparatus 2000 , which can be applied to the communication method shown in FIG. 4 above. The communication apparatus 2000 may be the network device 100 shown in FIG. 2 , or may be a component (eg, a chip) applied to the network device 100 . The communication device 2000 includes a processing unit 21 and a sending unit 22 . in:

the processing unit 21, configured to determine the value of the parameter used to calculate the size of the feedback signaling of the transport block carried in the physical downlink shared channel; and

The sending unit 22 is configured to send the value of the parameter for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel to the terminal device.

In a possible implementation manner, the processing unit 21 is configured to determine a value of a parameter for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel, so that the feedback signaling codebook is smaller than or equal to the threshold.

More detailed descriptions about the above processing unit 21 and the sending unit 22 can be obtained directly by referring to the relevant descriptions in the method embodiment shown in FIG. 4 , and details are not repeated here.

Based on the same concept of the communication method in the foregoing embodiment, as shown in FIG. 8 , an embodiment of the present application further provides a communication apparatus 3000 , which can be applied to the communication method shown in FIG. 5 above. The communication apparatus 3000 may be the terminal device 200 shown in FIG. 2 , or may be a component (eg, a chip) applied to the terminal device 200 . The communication apparatus 3000 includes a processing unit 31 and a sending unit 32 , and may also include a receiving unit 33 . in:

The processing unit 31 is configured to determine the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel;

The processing unit 31 is further configured to determine the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel; and

The sending unit 32 is configured to send the feedback signaling.

In a possible implementation manner, the receiving unit 33 is configured to receive the value of the parameter sent by the network device and used for calculating the size of the feedback signaling of the transport block carried in the physical downlink shared channel; the processing unit 31, for determining the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the value of the parameter, so that the feedback signaling codebook is less than or equal to the threshold.

In another possible implementation manner, the receiving unit 33 is configured to receive the value of a parameter sent by the network device and used to calculate the size of the feedback signaling of the transport block carried in the physical downlink shared channel; the processing The unit 31 is used for determining the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel according to the value of the parameter; and the processing unit 31 is further used for when the feedback signaling codebook exceeds a threshold value , it is determined that the feedback signaling codebook is invalid, or NACK is fed back in the feedback signaling codebook, or no feedback is performed.

Optionally, the sending unit 32 and the receiving unit 33 are an integral transceiver unit, or may be independent units.

More detailed descriptions about the above-mentioned processing unit 31 , sending unit 32 and receiving unit 33 can be obtained directly by referring to the relevant descriptions in the method embodiment shown in FIG. 5 , which will not be repeated here.

An embodiment of the present application further provides a communication device, where the communication device is configured to execute the above communication method. Part or all of the above communication methods can be implemented by hardware, and can also be implemented by software.

Optionally, the communication device may be a chip or an integrated circuit during specific implementation.

Optionally, when some or all of the communication methods in the above-mentioned embodiments are implemented by software, the communication device includes: a memory for storing a program; a processor for executing a program stored in the memory, and when the program is executed, This enables the communication device to implement the communication method provided by any of the foregoing embodiments in FIG. 3 to FIG. 5 .

Optionally, the above-mentioned memory may be a physically independent unit, or may be integrated with the processor.

Optionally, when part or all of the communication methods in the foregoing embodiments are implemented by software, the communication apparatus may also only include a processor. The memory for storing the program is located outside the communication device, and the processor is connected to the memory through a circuit/wire for reading and executing the program stored in the memory.

The processor may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.

The processor may further include a hardware chip. The above hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

The memory may include volatile memory (volatile memory), such as random-access memory (random-access memory, RAM); the memory may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory), A hard disk drive (HDD) or a solid-state drive (SSD); the memory may also include a combination of the above types of memory.

FIG. 9 shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, in FIG. 9 , the terminal device takes a mobile phone as an example. As shown in FIG. 9 , the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 9 . In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with a transceiver function can be regarded as the receiving unit and the sending unit of the terminal device (also collectively referred to as a transceiver unit), and the processor with a processing function can be regarded as the processing unit of the terminal device . As shown in FIG. 9 , the terminal device includes a transceiver unit 41 and a processing unit 42 . The transceiving unit 41 may also be referred to as a receiver/transmitter (transmitter), a receiver/transmitter, a receiver/transmitter circuit, or the like. The processing unit 42 may also be referred to as a processor, a processing board, a processing module, a processing device, or the like.

For example, in one embodiment, the transceiver unit 41 is configured to execute S303 in the embodiment shown in FIG. 5 ; and the processing unit 42 is configured to execute S301 and S302 in the embodiment shown in FIG. 5 .

FIG. 10 shows a schematic structural diagram of a simplified network device. The network equipment includes a radio frequency signal transceiving and converting part and a part 52 , and the radio frequency signal transceiving and converting part further includes a transceiving unit 51 part. The radio frequency signal transceiver and conversion part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; the 52 part is mainly used for baseband processing and control of network equipment. The transceiving unit 51 may also be referred to as a receiver/transmitter (transmitter), a receiver/transmitter, a receiver/transmitter circuit, or the like. Part 52 is usually the control center of the network device, which can usually be referred to as a processing unit, and is used to control the network device to execute the steps performed by the network device in the above-mentioned FIG. 4 . For details, please refer to the descriptions in the relevant sections above.

The 52 part may include one or more single boards, and each single board may include one or more processors and one or more memories, and the processors are used to read and execute programs in the memories to implement baseband processing functions and provide access to network equipment. control. If there are multiple boards, each board can be interconnected to increase processing capacity. As an optional implementation manner, one or more processors may be shared by multiple boards, or one or more memories may be shared by multiple boards, or one or more processors may be shared by multiple boards at the same time. device.

For example, in one embodiment, part 52 is used to execute step S201 of the embodiment shown in FIG. 4 ; and the transceiver unit 51 is used to execute step S202 of the embodiment shown in FIG. 4 .

Embodiments of the present application further provide a computer-readable storage medium, where computer programs or instructions are stored in the computer-readable storage medium, and when the computer programs or instructions are executed, the methods described in the above aspects are implemented.

Embodiments of the present application also provide a computer program product including instructions, which, when the instructions are run on a computer, cause the computer to execute the methods described in the above aspects.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the division of the unit is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be ignored, or not implement. The shown or discussed mutual coupling, or direct coupling, or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted over a computer-readable storage medium. The computer instructions can be sent from one website site, computer, server, or data center to another by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) A website site, computer, server or data center for transmission. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available media may be read-only memory (ROM), or random access memory (RAM), or magnetic media, such as floppy disks, hard disks, magnetic tape, magnetic disks, or optical media, such as digital A general-purpose optical disc (digital versatile disc, DVD), or a semiconductor medium, for example, a solid state disk (solid state disk, SSD) or the like.

Claims (21)

1. A method of communication, comprising:

determining a first CBG number according to the time domain characteristics of a Physical Downlink Shared Channel (PDSCH);

determining the size of a feedback signaling of a Transport Block (TB) carried in the PDSCH according to the first CBG number;

determining the feedback signaling of the transport block TB carried in the PDSCH according to the size of the feedback signaling of the transport block TB carried in the PDSCH;

and sending the feedback signaling.

2. The method of claim 1, wherein the determining a first CBG number based on time domain characteristics of the PDSCH comprises:

determining a second CBG number according to the time domain characteristics of the PDSCH;

determining a first CBG number according to the second CBG number;

determining the first CBG number according to the second CBG number comprises the following steps:

determining a first CBG number according to the second CBG number, wherein the first CBG number is equal to the second CBG number; or

And determining a first CBG number according to the second CBG number and a third CBG number, wherein the first CBG number is the smaller value of the second CBG number and the third CBG number, and the third CBG number is a parameter of network configuration.

3. The method of claim 2, wherein determining the first CBG number based on the second CBG number comprises:

and determining a first CBG number according to the type of the feedback codebook.

4. The method of claim 3, wherein the determining the first number of CBGs based on the feedback codebook type comprises:

for a first type feedback codebook, the first CBG number is equal to the second CBG number, or the first CBG number is the smaller of the second CBG number and a third CBG number, where the third CBG number is a parameter of network configuration;

for a second type feedback codebook, the first number of CBGs is equal to the second number of CBGs, or the first number of CBGs is equal to the third number of CBGs.

5. The method of claim 2, wherein the determining a second CBG number according to the time domain characteristics of the PDSCH comprises:

determining a first time domain resource number according to the time domain characteristics of the PDSCH;

and determining a second CBG number according to the first time domain resource number.

6. The method of claim 2, wherein the determining a second CBG number based on the time domain characteristics of the PDSCH comprises:

and determining a second CBG number according to the mapping type of the PDSCH.

7. The method of claim 6, wherein the determining a second CBG number according to the mapping type of the PDSCH comprises:

when the mapping type of the PDSCH is type A, determining a second CBG number as the third CBG number;

and when the mapping type of the PDSCH is type B, determining that the second CBG number is a fifth CBG number.

8. The method of any one of claims 1 to 7, further comprising:

and determining the number of CBGs in the TB carried in the PDSCH according to the first CBG number.

9. The method of any of claims 1 to 7, wherein the sending the feedback signaling comprises:

and sending the feedback signaling in a mode of multiplexing transmission with a PUSCH.

10. A communications apparatus, comprising:

the processing unit is used for determining a first CBG number according to the time domain characteristics of a Physical Downlink Shared Channel (PDSCH);

the processing unit is further configured to determine, according to the first CBG number, a size of a feedback signaling of a transport block TB carried in a physical downlink shared channel;

the processing unit is further configured to determine a feedback signaling of the transport block TB carried in the physical downlink shared channel according to the size of the feedback signaling of the transport block TB carried in the physical downlink shared channel;

a sending unit, configured to send the feedback signaling.

11. The apparatus as recited in claim 10, said processing unit to:

determining a second CBG number according to the time domain characteristics of the PDSCH;

determining a first CBG number according to the second CBG number;

the processing unit is configured to:

determining a first CBG number according to the second CBG number, wherein the first CBG number is equal to the second CBG number; or

And determining a first CBG number according to the second CBG number and a third CBG number, wherein the first CBG number is the smaller value of the second CBG number and the third CBG number, and the third CBG number is a parameter of network configuration.

12. The apparatus as recited in claim 11, said processing unit to:

and determining a first CBG number according to the type of the feedback codebook.

13. The apparatus as recited in claim 12, said processing unit to:

for a first type feedback codebook, the first CBG number is equal to the second CBG number, or the first CBG number is the smaller of the second CBG number and a third CBG number, where the third CBG number is a parameter of network configuration;

for a second type feedback codebook, the first number of CBGs is equal to the second number of CBGs, or the first number of CBGs is equal to the third number of CBGs.

14. The apparatus of claim 11, wherein the processing unit is configured to:

determining a first time domain resource number according to the time domain characteristics of the PDSCH;

and determining a second CBG number according to the first time domain resource number.

15. The apparatus as recited in claim 11, said processing unit to:

and determining a second CBG number according to the mapping type of the PDSCH.

16. The apparatus of claim 15, wherein the processing unit is configured to:

when the mapping type of the PDSCH is type A, determining a second CBG number as the third CBG number;

and when the mapping type of the PDSCH is type B, determining that the second CBG number is a fifth CBG number.

17. The apparatus according to any one of claims 10 to 16, wherein the processing unit is further configured to:

and determining the number of CBGs in the TB carried in the PDSCH according to the first CBG number.

18. The apparatus according to any of claims 10 to 16, wherein the sending unit is configured to:

and sending the feedback signaling in a mode of multiplexing transmission with a PUSCH.

19. A communication apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 9 when executing the computer program.

20. A communication device comprising a processor configured to couple to a memory, read instructions from the memory, and implement the method of any one of claims 1 to 9 in accordance with the instructions.

21. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 9.

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