CN113439402B

CN113439402B - Decoding method, device and system

Info

Publication number: CN113439402B
Application number: CN202080001664.3A
Authority: CN
Inventors: 花梦; 梁继业; 孙宇佳; 焦淑蓉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2022-12-06
Anticipated expiration: 2040-01-23
Also published as: WO2021147103A1; CN113439402A

Abstract

A decoding method, device and system, the method includes: receiving the k-th retransmitted data from the network equipment and receiving indication information from the network equipment; determining that the received data retransmitted from the network equipment at the k-1 st time participate in combination according to the indication information, and decoding based on the first combination result, decoding information corresponding to the data retransmitted at the k-1 st time and the data retransmitted at the k time; at least one data participating in combination exists from the received initial transmission data from the network equipment to the received data retransmitted from the network equipment for the (k-2) th time, and the first combination result is determined based on the decoding information corresponding to the at least one data participating in combination. By adopting the method, the decoding information corresponding to the data participating in combination in the previous multiple transmissions can be used for decoding, so that the retransmission probability can be reduced.

Description

Decoding method, device and system

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a decoding method, apparatus, and system.

Background

Mobile communication technology has profoundly changed people's lives, but the pursuit of higher performance mobile communication technology has never stopped. In order to cope with explosive mobile data traffic increase, massive mobile communication device connection, and various new services and application scenarios which are continuously emerging, the fifth generation (5G) mobile communication system is in operation. The 5G mobile communication system is called New Radio (NR). The International Telecommunications Union (ITU) defines three broad classes of application scenarios for 5G and future mobile communication systems: enhanced mobile broadband (eMBB), ultra-reliable and low latency communications (URLLC), and massive machine type communications (mtc).

Because the URLLC service is bursty, in order to improve the utilization rate of system resources, the base station usually does not reserve resources for downlink data transmission of the URLLC service. When the URLLC service data reaches the base station, if there is no idle time-frequency resource, the base station cannot wait for scheduling the URLLC service data after the transmission of the eMBB service data scheduled this time is completed in order to meet the ultra-short delay requirement of the URLLC service. The base station can allocate time frequency resources for the URLLC service data in a preemptive manner. As shown in fig. 1, the preempted time-frequency resource is a part or all of the time-frequency resources allocated by the base station for transmitting the eMBB service data, and the base station transmits the URLLC service data on the preempted time-frequency resource without transmitting the eMBB service data.

In PDSCH transmission of the eMBB service, when data transmission is not affected, there is about 10% probability of 1 retransmission and about 1% probability of 2 retransmissions. When the time-frequency resource for transmitting the eMMC service data is preempted by the burst URLLC service data, the retransmission probability of the eMMC service data is improved.

Disclosure of Invention

The application provides a decoding method, a decoding device and a decoding system, which are used for reducing the retransmission probability of eMMC service data when time-frequency resources for transmitting the eMMC service data are occupied by burst URLLC service data.

In a first aspect, the present application provides a decoding method, which may be performed by an electronic device, where the electronic device may be a terminal device, or a processor in the terminal, or a chip system in the terminal device. The method comprises the following steps: receiving data retransmitted at the kth time from network equipment, wherein k is a positive integer greater than or equal to 2; receiving indication information from the network equipment; determining that the received data retransmitted from the network equipment at the k-1 st time participate in combination according to the indication information, and decoding based on the first combination result, decoding information corresponding to the data retransmitted at the k-1 st time and the data retransmitted at the k time; at least one data participating in combination exists from the received initial transmission data from the network equipment to the received data retransmitted from the network equipment for the (k-2) th time, and the first combination result is determined based on the decoding information corresponding to the at least one data participating in combination.

By adopting the method, when the data retransmitted for the (k-1) th time participates in the combination, the decoding information corresponding to the data participating in the combination in the previous multiple transmissions can be used for decoding, so that the receiving performance of the PDSCH can be improved, and the retransmission probability can be reduced.

In a possible design, it is determined that the data of the k-1 th retransmission received from the network device participates in the combining according to the indication information, and the decoding is performed based on the first combining result, the decoding information corresponding to the data of the k-1 th retransmission and the data of the k-th retransmission, which may adopt methods including but not limited to the following: and determining that the data retransmitted for the (k-1) th time participates in combination according to the indication information, and decoding based on a second combination result and the data retransmitted for the (k) th time, wherein the second combination result is the combination result of the combination of the first combination result and the decoding information corresponding to the data retransmitted for the (k-1) th time.

It should be understood that the second combining result may be stored before determining that the data retransmitted for the (k-1) th time participates in the combining according to the indication information, or after determining that the data retransmitted for the (k-1) th time participates in the combining according to the indication information, the second combining result is obtained by combining based on the first combining result and decoding information corresponding to the data retransmitted for the (k-1) th time. This is not a limitation of the present application.

In one possible design, the indication information includes code block group erasure information CBGFI; determining that the received data from the (k-1) th retransmission of the network device participates in the combining according to the indication information, the following methods may be adopted, including but not limited to: when the CBGFI is used for indicating that the reception of the data retransmitted for the (k-1) th time is possibly not influenced, determining that the data retransmitted for the (k-1) th time participates in combination; and the data retransmitted at the k-1 time is one or more coding blocks CB retransmitted at the k-1 time or one or more coding block groups CBG.

By adopting the design, the data of the k-1 th retransmission determined according to the CBGFI can participate in the combination.

In one possible design, the indication information includes a preemption indication PI; determining that the received data from the (k-1) th retransmission of the network device participates in the combining according to the indication information, the following methods may be adopted, including but not limited to: when the PI is used for indicating that time-frequency resources used for transmitting the data retransmitted for the (k-1) th time are not preempted, determining that the data retransmitted for the (k-1) th time participate in combination; and the data retransmitted for the (k-1) th time is the data retransmitted for the (k-1) th time on one time-frequency resource indicated by the PI.

By adopting the design, the data of the k-1 th retransmission determined according to the PI can participate in the combination.

In one possible design, further comprising: and when decoding and decoding failure is carried out based on the first combination result, the decoding information corresponding to the data retransmitted at the k-1 st time and the data retransmitted at the k-1 st time, storing a third combination result and the decoding information corresponding to the data retransmitted at the k-1 st time, wherein the third combination result is a combination result of the first combination result and the decoding information corresponding to the data retransmitted at the k-1 st time.

By adopting the design, the decoding information corresponding to the data which participates in the combination before can not be lost, and the retransmission probability can be reduced.

In a possible design, the third combination result and the decoding information corresponding to the kth retransmitted data are stored in a first storage unit, or the first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled by the data from the first transmission to the kth retransmission, and the second storage unit is a storage unit allocated to any non-scheduled process.

By adopting the design, the decoding information to be stored can be stored by using the storage space of the unscheduled process under the condition of not increasing the storage space, and further the resource utilization rate is improved.

In one possible design, further comprising: and when decoding based on the second combination result and the kth retransmitted data fails, storing the second combination result and a fourth combination result, wherein the fourth combination result is a combination result obtained by combining the second combination result and decoding information corresponding to the kth retransmitted data.

By adopting the design, the decoding information corresponding to the data which participates in the merging before can not be lost, and the retransmission probability is favorably reduced.

In a possible design, the second combination result and the fourth combination result are stored in a first storage unit, or a first storage unit and a second storage unit, where the first storage unit is a storage unit allocated to a process scheduled for data from the first transmission to the kth retransmission, and the second storage unit is a storage unit allocated to any non-scheduled process.

By adopting the design, the decoding information to be stored can be stored by using the storage space of the unscheduled process under the condition of not increasing the storage space, so that the resource utilization rate is improved.

In one possible design, further comprising: and determining that the received data retransmitted from the k-1 th time of the network equipment does not participate in combination according to the indication information, and decoding based on the first combination result and the data retransmitted from the k time.

By adopting the method, when the data retransmitted for the (k-1) th time does not participate in the combination, the decoding information corresponding to the data participating in the combination in the previous multiple transmissions can be used for decoding, so that the receiving performance of the PDSCH can be improved, and the retransmission probability can be reduced.

In one possible design, the indication information includes CBGFI; determining that the received data from the k-1 th retransmission of the network device does not participate in the combining according to the indication information, the following methods may be adopted, including but not limited to: when the CBGFI is used for indicating that the reception of the data retransmitted for the (k-1) th time is possibly influenced, determining that the data retransmitted for the (k-1) th time does not participate in combination; wherein, the data of the k-1 retransmission is one or more CBs or one or more CBGs of the k-1 retransmission.

By adopting the design, the data retransmitted at the k-1 th time can be determined not to participate in combination according to the CBGFI.

In one possible design, the indication information includes a PI; determining that the received data from the k-1 th retransmission of the network device does not participate in the combining according to the indication information, the following methods may be adopted, including but not limited to: when the PI is used for indicating that time-frequency resources used for transmitting the data retransmitted for the (k-1) th time are preempted, determining that the data retransmitted for the (k-1) th time do not participate in combination; and the data retransmitted for the (k-1) th time is data retransmitted for the (k-1) th time on one time-frequency resource indicated by the PI.

By adopting the design, the data retransmitted at the k-1 st time can be determined not to participate in merging according to the PI.

In one possible design, further comprising: and when decoding and decoding based on the first combination result and the data retransmitted at the k time fail, storing the first combination result and a fifth combination result, wherein the fifth combination result is a combination result of combining the first combination result and decoding information corresponding to the data retransmitted at the k time.

In a possible design, the first combination result and the fifth combination result are stored in a first storage unit, or a first storage unit and a second storage unit, where the first storage unit is a storage unit allocated to a process scheduled for data from the first transmission to the kth retransmission, and the second storage unit is a storage unit allocated to any non-scheduled process.

In one possible design, further comprising: and when decoding is failed based on the first combination result and the data retransmitted at the k time, storing decoding information corresponding to the first combination result and the data retransmitted at the k time.

In one possible design, the first combining result and the decoding information corresponding to the kth retransmitted data are stored in a first storage unit, or the first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled by the data from the first transmission to the kth retransmission, and the second storage unit is a storage unit allocated to any non-scheduled process.

In one possible design, further comprising: receiving initial transmission data from network equipment; when the decoding of the initial transmission data fails, storing decoding information corresponding to the initial transmission data; receiving the 1 st retransmitted data from the network equipment; and when the initial transmission data participates in combination and decoding is failed based on decoding information corresponding to the initial transmission data and the data retransmitted for the 1 st time, storing the decoding information corresponding to the initial transmission data and a combination result obtained by combining the decoding information corresponding to the initial transmission data and the decoding information corresponding to the data retransmitted for the 1 st time.

By adopting the design, the decoding information corresponding to the initially transmitted data can be prevented from being lost, and the retransmission probability is favorably reduced.

In one possible design, decoding information corresponding to the initially transmitted data, and a combination result obtained by combining the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data are stored in a first storage unit, or a first storage unit and a second storage unit, where the first storage unit is a storage unit allocated to a process scheduled for data from the initially transmitted data to the kth retransmitted data, and the second storage unit is a storage unit allocated to any non-scheduled process.

In one possible design, further comprising: receiving initial transmission data from network equipment; when the decoding of the initial transmission data fails, storing decoding information corresponding to the initial transmission data; receiving data of 1 st retransmission from the network equipment; and when the initial transmission data is combined, and decoding is failed based on the decoding information corresponding to the initial transmission data and the data retransmitted for the 1 st time, storing the decoding information corresponding to the initial transmission data and the decoding information corresponding to the data retransmitted for the 1 st time.

In one possible design, decoding information corresponding to the initially transmitted data and decoding information corresponding to the 1 st retransmitted data are stored in a first storage unit, or the first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled for the initially transmitted data to the k retransmitted data, and the second storage unit is a storage unit allocated to any non-scheduled process.

It should be understood that the first storage unit and the second storage unit are storage units respectively allocated to different processes, and exemplarily, the first storage unit and the second storage unit are caches.

The first storage unit and the second storage unit may be located in a storage unit within the electronic device or be a storage unit coupled to the electronic device. Specifically, the first storage unit and the second storage unit may occupy a part of a storage space in the nonvolatile memory, or may also occupy a part of a storage space in the volatile memory. The non-volatile memory may include, but is not limited to, a hard disk or a solid state disk, and the like, and the volatile memory may include, but is not limited to, a random access memory or a static random access memory, and the like.

In one possible design, the indication information is carried by a medium access control element, MAC-CE, or radio resource control, RRC, signaling.

By adopting the design, the indication information can be carried through the MAC-CE or the RRC.

In a second aspect, the present application provides a communication apparatus, which may be a terminal device or a chip in the terminal device. The apparatus may include a processing unit, a transmitting unit, and a receiving unit. It should be understood that the transmitting unit and the receiving unit may also be a transceiving unit here. When the apparatus is a terminal device, the processing unit may be a processor, and the transmitting unit and the receiving unit may be transceivers; the terminal device may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored by the storage unit, so as to enable the terminal device to perform the method in the first aspect or any one of the possible designs of the first aspect. When the apparatus is a chip within a terminal device, the processing unit may be a processor, and the transmitting unit and the receiving unit may be input/output interfaces, pins, circuits, or the like; the processing unit executes instructions stored by the storage unit to cause the chip to perform the method of the first aspect or any one of the possible designs of the first aspect. The storage unit is used for storing instructions, and the storage unit may be a storage unit (e.g., a register, a cache, etc.) inside the chip or a storage unit (e.g., a read-only memory, a random access memory, etc.) outside the chip inside the terminal device.

In a third aspect, the present application also provides a readable storage medium storing instructions that, when executed, cause the method of the first aspect to be implemented.

In a fourth aspect, the present application also provides a computer program code which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a fifth aspect, the present application also provides a computer program product comprising a program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a sixth aspect, the present application further provides a communication device, including a processor and a memory; the memory is used for storing computer execution instructions; the processor is configured to execute computer-executable instructions stored by the memory to cause the communication device to perform the method of the first aspect.

In a seventh aspect, the present application further provides a communications apparatus comprising a processor and an interface circuit; the interface circuit is used for receiving the code instruction and transmitting the code instruction to the processor; the processor executes the code instructions to perform the method of the first aspect described above.

In an eighth aspect, the present application further provides a communication system, where the communication system includes a network device and a terminal device, and the terminal device executes the method of the first aspect.

Drawings

Fig. 1 is a schematic diagram illustrating that a base station allocates time-frequency resources for URLLC service data in a preemption manner in the present application;

FIG. 2 is a block diagram of a mobile communication system according to the present application;

FIG. 3 is one of the schematic diagrams of the frequency domain range and the time domain range indicated by PI in the present application;

FIG. 4 is a second schematic diagram of the frequency domain range and the time domain range indicated by PI in the present application;

FIG. 5 is a schematic diagram of a time-frequency resource partitioning manner {7,2} corresponding to PI in the present application;

FIG. 6 is a diagram illustrating transport block coding in NR of the present application;

FIG. 7 is a diagram of channel coding in the present application;

FIG. 8 is a schematic diagram of redundancy versions in the present application;

FIG. 9 is a flowchart illustrating an overview of a decoding method according to the present application;

FIG. 10 is a decoding flow diagram for CBGFI-only scenarios in the present application;

FIG. 11 is a decoding flow diagram for a PI-only scenario in the present application;

FIG. 12 is a schematic diagram of a redundancy version corresponding to that of FIG. 11 in the present application;

FIG. 13 is a schematic view of the device of the present application;

FIG. 14 is a second schematic diagram of the device structure of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings.

Fig. 2 is an architecture diagram of a mobile communication system to which an embodiment of the present application is applied. As shown in fig. 2, the mobile communication system includes a core network device 210, a network device 220, and at least one terminal device (230, 240). The terminal equipment is connected with the network equipment in a wireless mode, and the network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the network device may be separate physical devices, or the function of the core network device and the logic function of the network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the network device. The terminal equipment may be fixed or mobile. Fig. 2 is a schematic diagram, and the communication system may further include other network devices, for example, the communication system may further include a wireless relay device and a wireless backhaul device, which are not shown in fig. 2. The embodiments of the present application do not limit the number of core network devices, and terminal devices included in the mobile communication system.

The network device is an access device that the terminal device accesses to the mobile communication system in a wireless manner, and may be a base station (NodeB), an evolved NodeB (eNodeB), a base station in an NR mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, and the like.

A terminal equipment may also be referred to as a terminal (terminal), user Equipment (UE), mobile Station (MS), mobile Terminal (MT), etc. The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in home (smart home), and the like.

The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellites. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

The network device and the terminal device, and the terminal device may communicate via a licensed spectrum (licensed spectrum), may communicate via an unlicensed spectrum (unlicensed spectrum), and may communicate via both the licensed spectrum and the unlicensed spectrum. The network device and the terminal device may communicate with each other via a 6G or less spectrum, may communicate via a 6G or more spectrum, and may communicate using both a 6G or less spectrum and a 6G or more spectrum. The embodiment of the application does not limit the spectrum resources used between the network device and the terminal device.

The main prior art to which this application relates is described below.

1. Typical services for three major classes of application scenarios:

typical eMBB services include: the services include ultra high definition video, augmented Reality (AR), virtual Reality (VR), and the like, and these services are mainly characterized by large transmission data volume and high transmission rate.

Typical URLLC services include: the main characteristics of the applications of wireless control, motion control of unmanned vehicles and unmanned airplanes, and haptic interaction such as remote repair and remote operation in industrial manufacturing or production processes are that the services require ultra-high reliability, low time delay, less data transmission amount and are bursty.

Typical mtc traffic includes: the intelligent power distribution automation, smart city etc. main characteristics are that networking equipment quantity is huge, transmission data volume is less, data are insensitive to transmission delay, and these mMTC terminals need satisfy the demand of low-cost and very long standby time.

2. Resource allocation when the URLLC service and the eMBB service coexist:

resources herein include, but are not limited to: time domain resources, frequency domain resources, codeword resources, air interface resources, beam resources, and the like. Generally, the allocation of system resources is performed by a network device, and the network device is taken as an example for description below.

Because the data volume of the eMBB service is relatively large and the transmission rate is relatively high, a relatively long time scheduling unit is usually used for data transmission to improve the transmission efficiency, for example, one time slot with a 15kHz subcarrier interval is used, corresponding to 14 time domain symbols, and the corresponding time length is 1ms. URLLC service data usually employs a shorter time scheduling unit to meet the requirement of ultra-short delay, for example, 2 time domain symbols at 15kHz subcarrier intervals are employed, the corresponding time length is 0.14ms, or one time slot at 60kHz subcarrier intervals is employed, corresponding to 14 time domain symbols, the corresponding time length is 0.25ms.

The generation of data of URLLC traffic is bursty and random, and may not generate a data packet for a long period of time or may generate multiple data packets in a short period of time. The characteristics of the data packets of URLLC traffic can affect the manner in which resources are allocated to the communication system. If the network device allocates resources for the URLLC service in a manner of reserving resources, these resources are wasted when there is no URLLC service. Moreover, the short delay characteristic of URLLC service requires that the data packet is transmitted in a very short time, so that the network device needs to reserve a large enough bandwidth for URLLC service, which results in a serious decrease in resource utilization. Therefore, in order to improve the system resource utilization, the network device usually does not reserve resources for the downlink data transmission of the URLLC service. When the URLLC service data reaches the base station, if there is no idle time-frequency resource, the network device may adopt a preemption mode to allocate resource for the URLLC service data in order to meet the ultra-short delay requirement of the URLLC service.

Specifically, when URLLC service data arrives at the base station, if there is no idle time-frequency resource, the base station cannot wait for scheduling the URLLC service data after completing transmission of the eMBB service data scheduled this time in order to meet the ultra-short delay requirement of the URLLC service. The base station can allocate time frequency resources for the URLLC service data in a preemptive manner. As shown in fig. 1, the preempted time-frequency resource is a part or all of the time-frequency resources allocated by the base station for transmitting the eMBB service data, and the base station transmits the URLLC service data on the preempted time-frequency resource without transmitting the eMBB service data. Therefore, when the time-frequency resource for transmitting the eMBB service data is occupied by the bursty URLLC service data, even if the UE receiving the eMBB service data knows that the time-frequency resource is occupied, according to the decoding method in the prior art, the UE may demodulate and decode the URLLC service data as its own data, thereby causing decoding failure. More seriously, for the transport block with decoding failure, the UE stores the soft value of the transport block, combines the soft value with the retransmitted transport block, and performs decoding based on the combined result, thereby causing decoding failure of the retransmitted transport block. Therefore, under the above scenario, the retransmission probability of the eMBB service data may be increased.

3. The prior art provides the following two schemes for notifying the UE that the time-frequency resource is occupied:

scheme 1: preemption Indication (PI):

the preemption indication is carried in a group common Downlink Control Information (DCI), and the preemption indication indicates resource preemption in a 14-bit (bit) bitmap manner. A bitmap indicates one or more frequency domain portions (N > = 1) and/or one or more time domain portions (M > = 1), { M, N }, which may take on the value {14,1} or {7,2}. That is, the time-frequency resources are first partitioned, and the result of the partitioning is that both the network device and the UE are known, and then the network device sends a PI to notify the UE whether each block of time-frequency resources is preempted by the URLLC.

Sending period of DCI carrying PI is as followsAnd configuring high-layer parameters by taking a slot (slot) as a unit. Assuming that the period is T _INT For each time slot, the time-frequency range indicated by each 14-bit PI is:

frequency domain: all Resource Blocks (RB) of the whole bandwidth part (BWP) are denoted as B _INT And (4) one RB.

Time domain: is marked as N _INT A symbol.

As shown in fig. 3 and 4, the frequency domain range indicated by PI is the entire BWP. In FIG. 3, time domain N _INT For 28 symbols, in FIG. 4, time domain N _INT Is 18 symbols.

According to the configuration of high-level parameters, the time-frequency resources corresponding to the PI have two division modes, and the time-frequency resources corresponding to each bit in 14 bits are also different:

{14,1}: at this time, the time frequency resource is divided into 14 parts in time, and is not divided in frequency. For 14-bit PI, each bit corresponds to a time-frequency resource, which may be called a time-frequency sub-resource. The bit is 0, which indicates that the time frequency resource can be transmitted by the user, i.e. the time frequency resource is not preempted; the bit is taken to be 1, which means that the time frequency resource has no transmission of the user, i.e. the time frequency resource is preempted.

{7,2}: in this case, the time-frequency resource is divided into 7 parts in time and 2 parts in frequency. The 14-bit PI is divided into one group of every 2 bits, and the total number of the groups is seven. The bit is 0 to indicate that the time frequency resource can be transmitted by the user; a bit of 1 indicates that there is no transmission for the user on the time-frequency resource. An example of the time-frequency resource division mode corresponding to one PI is {7,2} is given as shown in fig. 5.

Scheme 2: code Block Group (CBG) erasure information (CBG flashing out information, CBGFI):

in NR, a Physical Downlink Shared Channel (PDSCH) includes 1-2 Transport Blocks (TBs), and each TB corresponds to a Cyclic Redundancy Check (CRC). Each TB may contain one or more Coded Blocks (CBs), one for each CRC. The CBs contained in each TB may be divided into Coded Block Groups (CBGs), each CBG containing one or more CBs. A CBG may correspond to a positive Acknowledgement (ACK) or Negative Acknowledgement (NACK) indication. Illustratively, the UE may feed back ACK or NACK to the gNB in CBG units, and accordingly, the gNB may retransmit data in CBG units.

If the high-level signaling configures the UE to perform CBG-based PDSCH transmission, the UE determines the number of CBGs in a transmission block according to the following formula:

M＝min(N,C)，

here, N is the maximum CBG number in one TB of the higher layer parameter configuration, and C is the CB number in one TB.

Let M ₁ ＝mod(C,M)，

If M is ₁ =0, then each CBG contains

CB; if M is ₁ If greater than 0, then front M ₁ Each CBG comprises K ₁ CB, post M-M ₁ Each CBG comprises K ₂ And (5) CB.

Two fields (fields) of a CBG transmission information (CBGTI) and a CBGFI may exist in DCI scheduling a PDSCH.

The CBGTI field contains N _TB N bits, where N _TB Is the number of TBs configured by the high-level parameters. If N is present _TB If =2, the first N bits of the 2N bits correspond to the first TB, and the first M bits of the last N bits correspond to the 2 nd TB.

When the network device performs PDSCH initial transmission, the UE may assume that all CBGs in the TB exist. When the network device performs PDSCH retransmission, the UE may assume:

and the CBGTI domain indicates the CBG existing in the retransmission, wherein one bit used for indicating the CBG in the CBGTI domain is taken as an example, if the bit indicates 0, the CBG corresponding to the bit does not have transmission, and if the bit indicates 1, the CBG corresponding to the bit has transmission.

If a CBGFI field exists, in the current protocol, the CBGFI field indicates 0 indicating that the reception of the last transmission of the CBGs for this transmission may be affected, and the CBGFI field indicates 1 indicating that the CBGs for this transmission may be combined with the corresponding CBGs for the last transmission, i.e., log-likelihood ratio (LLR) combining may be performed. It is not excluded that the latter protocol is modified, for example one CBG for one CBGFI indication. The CBG at retransmission contains the same CB as at initial transmission.

4. Transport block coding procedure in NR:

as shown in fig. 6, the following description will be made by taking the encoding process of transport block 1 and transport block 2 as an example. Specifically, first, an information bit sequence composed of a TB and a Cyclic Redundancy Check (CRC) is segmented into a plurality of information bit sequences composed of code blocks and CRCs, and as shown in fig. 6, the information bit sequence composed of a transport block 1 and a CRC is segmented into a plurality of information bit sequences composed of code blocks and CRCs. Further, each information bit sequence composed of a code block and a CRC is channel-coded, and the coding rate is also referred to as a mother code rate. In NR, the mother code rate is 1/3 or 1/5. As shown in fig. 7, assuming that the code rate of the mother code is 1/3, and the sum of the number of bits of the code block plus the number of bits of the CRC is N bits, the code rate is 3N bits after channel coding. Then, the information bit sequence after channel coding is subjected to rate matching, the rate matching mode may be a repetition mode or a truncation mode, and the purpose of the rate matching is to adapt the data to be sent to the air interface resources. As shown in fig. 8, because the time-frequency resources occupied by different transmissions may be different, bits to be transmitted may be selected from the information bit sequence after channel coding in different manners according to the time-frequency resources occupied by different transmissions, so as to obtain different redundancy versions. Different sub-transmissions may therefore transmit different redundancy versions, and the number of bits per redundancy version may also be different. And finally, interleaving the bits subjected to rate matching, and performing code block cascade on the interleaved bits to obtain a coded transmission block.

For example, if the rate matching mode at the initial transmission is truncation, as shown in fig. 8, the bit number of the redundancy version 0 is less than 3N bits in the redundancy version 0 under the truncation condition, the UE decodes with less than 3N LLRs during decoding, where each bit corresponds to one LLR, and if the decoding is incorrect, stores less than 3N LLRs to a corresponding location; if the rate matching mode at the initial transmission is repetition, such as redundancy version 0 in the case of repetition shown in fig. 8, where the bit number of redundancy version 0 is greater than 3N bits, the UE combines the repeated LLRs before decoding (e.g., LLRs corresponding to 2-segment dashed lines in fig. 8 are combined), decodes the combined LLRs with 3N LLRs, and stores 3N LLRs in the corresponding location if the decoding is incorrect. Further, if the rate matching mode at the time of retransmission is puncturing, such as redundancy version 1 in the puncturing case shown in fig. 8, the UE correspondingly combines the LLRs smaller than 3N and the stored LLRs at the time of decoding, and then decodes the combined LLRs. If the rate matching mode during retransmission is repeated, the UE combines the repeated LLRs transmitted at this time, then correspondingly combines the combined LLRs with the stored LLRs, and then decodes the combined LLRs.

5. Decoding information corresponding to the data:

the coding information corresponding to the data in this application may be a soft value (e.g., LLR) or a hard value (hard value) corresponding to the data. Illustratively, the LLR corresponding to 1 bit is a ratio of a probability that the bit takes a value of 1 obtained by soft decision to a probability that the bit takes a value of 0, and the hard value corresponding to 1 bit is a value of 0 or 1 obtained by hard decision (hard decision). Further, merging the decoding information corresponding to the data transmitted twice respectively refers to summing the two decoding information. Determining that data transmitted at a certain time participates in merging means that decoding information corresponding to the data transmitted at the time can be merged with previously stored decoding information or a merging result of the previously stored decoding information, that is, summed.

In the prior art, for example, a CBGFI-only scenario is taken, if initial transmission is normal transmission, the terminal device fails to decode the initially transmitted transmission block, and the terminal device stores the LLR corresponding to the initially transmitted transmission block. When the 1 st retransmission is affected by data transmission of the URLLC service and normal transmission is not performed, the DCI scheduled for the 1 st retransmission only indicates that the LLRs corresponding to the initially transmitted transport block participate in combining, the terminal device decodes based on the LLRs corresponding to the initially transmitted transport block and the LLRs corresponding to the 1 st retransmission transport block, and if the decoding fails, the terminal device saves the sum of the LLRs corresponding to the initially transmitted transport block and the LLRs corresponding to the 1 st retransmission transport block. In the 2 nd retransmission, if the DCI scheduling the 2 nd retransmission indicates that the LLRs corresponding to the transport block of the 1 st retransmission do not participate in combining, the terminal device discards the sum of the LLRs corresponding to the initially transmitted transport block and the LLRs corresponding to the transport block of the 1 st retransmission, and decodes the LLRs corresponding to the transport block of the 2 nd retransmission only. It can be seen that, when the 2 nd retransmission is normal transmission, since the terminal device performs decoding only based on the LLR corresponding to the transport block of the 2 nd retransmission, there is still about 10% probability of the 3 rd retransmission occurring at this time.

As can be seen from the above, in the process of transmitting data to the terminal device for multiple times by the network device, if normal transmission, abnormal transmission, and normal transmission are sequentially performed, the decoding method is adopted to lose the normally transmitted decoding information before the abnormal transmission, which will cause the PDSCH receiving performance to be degraded, and the retransmission probability to be improved.

It should be understood that the above-mentioned normal transmission refers to that the network device uses a time-frequency resource for transmitting the eMBB service data to transmit the eMBB service data to the terminal device, and the above-mentioned abnormal transmission refers to that, because the URLLC service has burstiness, in order to improve the utilization rate of the system resources, the network device usually does not reserve resources for the URLLC service data transmission, therefore, the network device uses a part or all of the time-frequency resources for transmitting the eMBB service data to transmit the URLLC service data to the terminal device, and does not transmit the eMBB service data.

It should be understood that the decoding method provided by the present application may be applied, but not limited to, the above scenario in which the network device sequentially performs normal transmission, abnormal transmission, and normal transmission during multiple data transmissions to the terminal device, and may also be applied to a scenario in which other network devices sequentially perform abnormal transmission, and normal transmission during multiple data transmissions to the terminal device, for example, a scenario in which the network device sequentially performs abnormal transmission, normal transmission, and normal transmission during multiple data transmissions to the terminal device, and for example, a scenario in which the network device sequentially performs normal transmission, and normal transmission during multiple data transmissions to the terminal device. In addition, the number of times the network device transmits data to the terminal device may be 3 or more.

Based on the above, the present application provides a decoding method for reducing retransmission probability of eMBB service data. It should be understood that the decoding method may be executed by the terminal device, or may be executed by a wireless communication apparatus disposed in the terminal device, where the wireless communication apparatus may be a baseband processor or a system on chip (SoC). The following description will be made by taking a terminal device as an example. As shown in fig. 9, the method includes:

step 901: and the terminal equipment receives the data retransmitted at the kth time from the network equipment, wherein k is a positive integer greater than or equal to 2.

Step 902: the terminal equipment receives the indication information from the network equipment.

It should be understood that the terminal device receiving the indication information may be before the terminal device receives the data retransmitted from the network device for the k-th time or after the terminal device receives the data retransmitted from the network device for the k-th time. Therefore, the order of step 901 and step 902 does not limit the specific timing of these two steps.

Step 903: and the terminal equipment judges whether the received data retransmitted from the network equipment at the (k-1) th time participates in combination or not according to the indication information, if so, step 904b or step 904c is executed, and if not, step 904a is executed.

In an example, if the indication information includes CBGFI, the terminal device determines that the data received from the network device retransmitted at the k-1 th time participates in the combining according to the indication information, step 904c is executed, and the terminal device determines that the data received from the network device retransmitted at the k-1 th time does not participate in the combining according to the indication information, step 904a is executed.

In another example, if the indication information includes PI, the terminal device determines that the data received from the network device retransmitted at the k-1 th time participates in the combining according to the indication information, step 904b is executed, and the terminal device determines that the data received from the network device retransmitted at the k-1 th time does not participate in the combining according to the indication information, step 904a is executed.

Step 904a: and determining that the data retransmitted for the (k-1) th time does not participate in the combination according to the indication information, and decoding by the terminal equipment based on the first combination result and the data retransmitted for the (k) th time.

Step 904b: and determining that the data retransmitted for the (k-1) th time participates in combination according to the indication information, and decoding by the terminal equipment based on the first combination result, the decoding information corresponding to the data retransmitted for the (k-1) th time and the data retransmitted for the (k) th time.

At least one data participating in combination exists from the received initial transmission data from the network equipment to the received data retransmitted from the network equipment for the (k-2) th time, and the first combination result is determined based on the decoding information corresponding to the at least one data participating in combination.

If only one data participating in merging exists in the data from the initial transmission data to the k-2 th retransmission, the first merging result is the decoding information corresponding to the data participating in merging. If the data retransmitted from the first transmission to the k-2 th retransmission contains a plurality of data participating in merging, the first merging result is a merging result obtained by merging the decoding information corresponding to the plurality of data participating in merging. It should be understood that when k =2, the data retransmitted at the k-2 th time is the initial data.

Step 904c: and determining that the data retransmitted for the (k-1) th time participates in combination according to the indication information, and decoding by the terminal equipment based on the second combination result and the data retransmitted for the (k) th time.

And the second combination result is the combination result obtained by combining the first combination result and the decoding information corresponding to the data retransmitted at the (k-1) th time.

It should be understood that the indication information may directly indicate whether the data retransmitted at the k-1 th time participates in the combining or may indirectly indicate whether the data retransmitted at the k-1 th time participates in the combining, which is not limited in the present application.

Two possible designs in which the indication information indirectly indicates whether the data of the (k-1) th retransmission participates in the combining are illustrated below.

A first possible design: the indication information includes CBGFI, which is carried by the DCI.

And when the CBGFI indicates that the reception of the data retransmitted for the (k-1) th time is possibly influenced, the terminal equipment determines that the data retransmitted for the (k-1) th time does not participate in the combination, or when the CBGFI indicates that the reception of the data retransmitted for the (k-1) th time is possibly not influenced, the terminal equipment determines that the data retransmitted for the (k-1) th time participates in the combination.

Illustratively, when the value of the CBGFI is 0, the CBGFI indicates that the reception of the data retransmitted at the k-1 th time may be affected, and the terminal device determines that the data retransmitted at the k-1 th time does not participate in the combining. Or, when the value of the CBGFI is 1, the CBGFI indicates that the reception of the data retransmitted at the k-1 th time may not be affected, and the terminal device determines that the data retransmitted at the k-1 th time participates in the combining. It should be understood that, the correspondence between the value of the CBGFI and the content indicated by the CBGFI is specified by the communication protocol, and as the communication protocol is updated, the correspondence between the value of the CBGFI and the content indicated by the CBGFI may change, or the number of bits occupied by the CBGFI may increase, which is not limited in this application.

Wherein, the data of the k-1 retransmission is one or more CBs or one or more CBGs of the k-1 retransmission.

Exemplarily, assuming that the network device configures the UE to perform CBG-based PDSCH transmission based on high-layer signaling, if the CBGFI field in the DCI scheduling the PDSCH indicates that the reception of the last CBGs of the current transmission may be affected (assuming that the last transmission is the (k-1) th retransmission), the UE determines that the CBGs of the (k-1) th retransmission do not participate in combining. The CBGFI field in the DCI scheduling the PDSCH may also indicate that the last transmission of several CBGs of the current transmission may participate in combining.

It should be understood that, since each CB corresponds to one CRC, if one CBG includes 2 CBs, the terminal device can only perform feedback with respect to the CBG, and therefore, when one CB in one CBG is successfully decoded and one CB is unsuccessfully decoded, the network device may retransmit the two CBs, and the terminal device may only store decoding information corresponding to the CB that has failed to be decoded, and when receiving the two CBs retransmitted by the network device, only decode, with respect to the CB that has failed to be decoded last time in the retransmitted two CBs and the stored decoding information corresponding to the CB that has failed to be decoded last time. Of course, the terminal device may also store decoding information corresponding to the 2 CBs, and decode the 2 CBs when receiving two CBs retransmitted by the network device.

A second possible design: the indication information comprises PI; the PI is carried by the DCI.

When the PI indicates that time-frequency resources used for transmitting the data retransmitted for the (k-1) th time are preempted, the terminal equipment determines that the data retransmitted for the (k-1) th time do not participate in combination; or when the PI indicates that the time-frequency resource used for transmitting the data retransmitted for the (k-1) th time is not preempted, the terminal equipment determines that the data retransmitted for the (k-1) th time participates in combination.

Exemplarily, when a value of a bit corresponding to a time-frequency resource for transmitting data retransmitted for the (k-1) th time in the PI is 1, the bit indicates that the time-frequency resource for transmitting the data retransmitted for the (k-1) th time is preempted, and the terminal device determines that the data retransmitted for the (k-1) th time does not participate in merging; or when the value of the bit corresponding to the time-frequency resource used for transmitting the data retransmitted for the (k-1) th time in the PI is 0, the bit indicates that the time-frequency resource used for transmitting the data retransmitted for the (k-1) th time is not preempted, and the terminal equipment determines that the data retransmitted for the (k-1) th time participates in combination.

It should be understood that, a correspondence between a value of each bit in the PI and a content indicated by the bit is specified by a communication protocol, and with an update of the communication protocol, the correspondence between the value of each bit in the PI and the content indicated by the bit may change, or a number of bits included in the PI may change, which is not limited in this application.

And the data retransmitted for the (k-1) th time is data retransmitted for the (k-1) th time on one time-frequency resource indicated by the PI.

Specifically, one time-frequency resource may include one symbol group and one PRB subset, for example, one time-frequency resource is divided into 14 time-frequency sub-resources, and through a bitmap of 14 bits included in the PI, it may indicate whether each time-frequency sub-resource is preempted.

For example, assuming that a time frequency resource is divided into 7 parts in time and 2 parts in frequency, that is, 14 parts of time frequency resources are divided equally, as shown in fig. 5, each bit in the 14-bit PI may indicate whether a time frequency resource is preempted, if the time frequency resource is preempted, data transmitted on the time frequency resource does not participate in combining, and if the time frequency resource is not preempted, data transmitted on the time frequency resource participates in combining.

Furthermore, it should be understood that the above two types of indication information are only examples, the indication information may also be carried by a medium access control element (MAC CE), and the MAC CE carries the indication information, so that the time delay may be reduced, but the overhead may be larger. When the indication information is carried by the MAC CE, the indication information may directly indicate whether the data retransmitted at the k-1 th time participates in the combining, or indirectly indicate whether the data retransmitted at the k-1 th time participates in the combining, which is not limited in the present application.

In addition, the indication information may also be carried by Radio Resource Control (RRC) signaling. The overhead can be reduced by carrying the indication information through RRC signaling, but the delay may be larger than that of the indication information carried by the MAC CE. When the indication information is carried by the RRC, the indication information may directly indicate whether the data retransmitted at the k-1 th time participates in the combining, or indirectly indicate whether the data retransmitted at the k-1 th time participates in the combining, which is not limited in the present application.

Further, when the UE fails decoding, the terminal device may employ, but is not limited to, the following design to save the decoding information to be saved after the decoding fails.

Scheme 1:

and the terminal equipment determines that the received data from the network equipment retransmitted for the (k-1) th time participates in combination according to the indication information, and decodes based on the second combination result and the data retransmitted for the (k) th time, and the terminal equipment determines that the received data from the network equipment retransmitted for the (k-1) th time does not participate in combination according to the indication information, and decodes based on the first combination result and the data retransmitted for the (k) th time. It can be seen that the terminal device may store the first combination result and the second combination result, decode based on the second combination result and the kth retransmitted data when determining that the received data from the network device at the k-1 st retransmission participates in the combination according to the indication information, and decode based on the first combination result and the kth retransmitted data when determining that the received data from the network device at the k-1 st retransmission does not participate in the combination according to the indication information.

And the terminal equipment determines that decoding based on the first combination result and the data retransmitted at the k time fails, and stores the first combination result and a fifth combination result, wherein the fifth combination result is a combination result obtained by combining the first combination result and decoding information corresponding to the data retransmitted at the k time. At this time, the terminal device stores the first combination result and the fifth combination result, and further, the terminal device receives data retransmitted from the network device for the (k + 1) th time, decodes the data retransmitted from the network device for the (k + 1) th time based on the fifth combination result when it is determined that the received data retransmitted from the network device for the (k) th time participates in the combination according to the indication information, and decodes the data retransmitted from the network device for the (k + 1) th time based on the first combination result when it is determined that the received data retransmitted from the network device for the (k) th time does not participate in the combination according to the indication information.

The first combination result and the fifth combination result may be stored in a first storage unit, or the first storage unit and a second storage unit, where the first storage unit is a storage unit allocated to a process scheduled by data from initial transmission to k-th retransmission, and the second storage unit is a storage unit allocated to any unscheduled process. By adopting the design, the network equipment does not need to configure a new storage unit for the terminal equipment, and the redundant storage unit is used for storing the decoding information required to be stored, so that the resource utilization rate can be improved.

And if the terminal equipment determines that the decoding is failed on the basis of the second combination result and the kth retransmitted data, storing the second combination result and a fourth combination result, wherein the fourth combination result is the combination result of the second combination result and the decoding information corresponding to the kth retransmitted data. At this time, the terminal device stores the second combining result and the fourth combining result, further, the terminal device receives the data retransmitted from the network device for the (k + 1) th time, decodes the data retransmitted from the network device for the (k + 1) th time based on the fourth combining result when it is determined that the received data retransmitted from the network device for the (k) th time participates in the combining according to the indication information, and decodes the data retransmitted from the network device for the (k + 1) th time based on the second combining result when it is determined that the received data retransmitted from the network device for the (k) th time does not participate in the combining according to the indication information.

Similarly, the second combination result and the fourth combination result are stored in the first storage unit, or the first storage unit and the second storage unit, where the first storage unit is a storage unit allocated to a process scheduled by data from the first transmission data to the kth retransmission, and the second storage unit is a storage unit allocated to any unscheduled process.

Based on the above scheme 1, the following description is provided for the data supplementation of the initial transmission data and the 1 st retransmission:

and the terminal equipment receives the initial transmission data from the network equipment, determines that the decoding of the initial transmission data fails, and stores decoding information corresponding to the initial transmission data. The terminal device sends a decoding failure message aiming at the initially transmitted data to the network device, the terminal device receives the 1 st retransmitted data from the network device, the terminal device determines that the initially transmitted data participates in combination, the decoding is carried out based on the decoding information corresponding to the initially transmitted data and the 1 st retransmitted data, the terminal device determines that the decoding fails, the decoding information corresponding to the initially transmitted data is stored, and the combination result of the combination of the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data is stored.

Similarly, decoding information corresponding to the initially transmitted data, and a combination result obtained by combining the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the data retransmitted for the 1 st time are stored in a first storage unit, or a first storage unit and a second storage unit, where the first storage unit is a storage unit allocated to a process scheduled for the data from the initially transmitted data to the data retransmitted for the kth time, and the second storage unit is a storage unit allocated to any unscheduled process.

Scheme 2:

and the terminal equipment determines that the received data retransmitted from the k-1 st time of the network equipment participates in combination according to the indication information, decodes based on the first combination result, decoding information corresponding to the data retransmitted from the k-1 st time and the data retransmitted from the k time, determines that the received data retransmitted from the k-1 st time of the network equipment does not participate in combination according to the indication information, and decodes based on the first combination result and the data retransmitted from the k time. It can be seen from this that, the terminal device may store the first combining result and decoding information corresponding to the data retransmitted for the (k-1) th time, decode the data retransmitted for the (k-1) th time based on the first combining result, the decoding information corresponding to the data retransmitted for the (k-1) th time, and the data retransmitted for the (k) th time when it is determined that the data retransmitted for the (k-1) th time received from the network device participates in combining according to the instruction information, and decode the data retransmitted for the (k-1) th time based on the first combining result and the data retransmitted for the (k) th time when it is determined that the data retransmitted for the (k-1) th time received from the network device does not participate in combining according to the instruction information.

And the terminal equipment determines that decoding is failed based on the first combination result and the data retransmitted at the k time, and stores decoding information corresponding to the first combination result and the data retransmitted at the k time. At this time, the terminal device stores the first combination result and decoding information corresponding to the kth retransmitted data, further, the terminal device receives the (k + 1) th retransmitted data from the network device, decodes the data based on the first combination result, the decoding information corresponding to the kth retransmitted data, and the (k + 1) th retransmitted data when it is determined that the received kth retransmitted data from the network device participates in combination according to the indication information, and decodes the data based on the first combination result and the (k + 1) th retransmitted data when it is determined that the received kth retransmitted data from the network device does not participate in combination according to the indication information.

The first combining result and decoding information corresponding to the kth retransmitted data are stored in a first storage unit, or the first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled by the data from the first transmission to the kth retransmission, and the second storage unit is a storage unit allocated to any non-scheduled process.

And the terminal equipment determines that decoding and decoding are failed based on the first combination result, the decoding information corresponding to the data retransmitted at the k-1 st time and the data retransmitted at the k-1 st time, and stores a third combination result and the decoding information corresponding to the data retransmitted at the k-1 st time, wherein the third combination result is a combination result of the first combination result and the decoding information corresponding to the data retransmitted at the k-1 st time. At this time, the terminal device stores the third combination result and the decoding information corresponding to the kth retransmitted data, further, the terminal device receives the (k + 1) th retransmitted data from the network device, decodes the data based on the third combination result, the decoding information corresponding to the kth retransmitted data, and the (k + 1) th retransmitted data when it is determined that the received kth retransmitted data from the network device participates in combination according to the indication information, and decodes the data based on the third combination result and the (k + 1) th retransmitted data when it is determined that the received kth retransmitted data from the network device does not participate in combination according to the indication information.

And the third combination result and decoding information corresponding to the kth retransmitted data are stored in a first storage unit, or the first storage unit and a second storage unit, wherein the first storage unit is a storage unit allocated to a process scheduled from the first transmitted data to the kth retransmitted data, and the second storage unit is a storage unit allocated to any unscheduled process.

Based on the above scheme 2, the following description is provided for the initial transmission data and the data translation supplement of the 1 st retransmission:

and the terminal equipment receives the initial transmission data from the network equipment, determines that the decoding of the initial transmission data fails, and stores decoding information corresponding to the initial transmission data. The terminal device sends a decoding failure message aiming at the initially transmitted data to the network device, the terminal device receives the 1 st retransmitted data from the network device, the terminal device determines that the initially transmitted data participates in combination, the decoding is carried out based on the decoding information corresponding to the initially transmitted data and the 1 st retransmitted data, and the terminal device determines that the decoding fails, the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data are stored.

The decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data are stored in a first storage unit, or the first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled by the data from the initially transmitted data to the kth retransmitted data, and the second storage unit is a storage unit allocated to any unscheduled process.

It should be understood that the first storage unit and the second storage unit are storage units respectively allocated to different processes, and the first storage unit and the second storage unit may be a buffer (buffer), for example.

The first storage unit and the second storage unit may be storage units located in the terminal device or storage units coupled to the terminal device. Specifically, the first storage unit and the second storage unit may occupy a part of a storage space in a non-volatile memory, or may also occupy a part of a storage space in a volatile memory (volatile memory). The non-volatile Memory may include, but is not limited to, a hard disk (HDD) or a solid-state drive (SSD), and the volatile Memory may include, but is not limited to, a Random-Access Memory (RAM) or a Static Random-Access Memory (SRAM).

The embodiment shown in fig. 9 will be described in detail with reference to specific examples.

Example 1: as shown in fig. 10, the decoding method provided by the present application is explained for CBGFI-only scenarios. One PDSCH includes 2 TBs, each TB may include one or more CBs, and the CBs included in each TB may be divided into several CBGs. And the gNB configures the UE for the PDSCH transmission based on the CBG through high-layer signaling. One CBG may correspond to one ACK or NACK.

S1001: and the gNB sends the DCI and the initial PDSCH corresponding to the initial PDSCH of a certain process. Correspondingly, the UE receives the DCI corresponding to the initial PDSCH of the process and the initial PDSCH.

For example, the DCI may include a hybrid automatic repeat request (HARQ) process number, time-frequency resource information of an initial PDSCH, and the like.

S1002: the UE obtains LLRs corresponding to the initial PDSCH for the initial PDSCH, and the UE decodes the initial PDSCH based on the LLRs corresponding to the initial PDSCH, wherein decoding of a plurality of CBs fails, the LLR of one CB with decoding failure is marked as LLR1, and the CB is marked as a first CB.

LLR1 may be stored in a first memory location, which is the memory location allocated for the currently scheduled process.

S1003: and for the CBG where the first CB is located, the UE sends NACK to the gNB. Accordingly, the gNB receives a NACK from the UE.

S1004: and the gNB transmits the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission. Correspondingly, the UE receives the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission.

The DCI corresponding to the PDSCH retransmitted for the 1 st time comprises CBGTI and CBGFI, the CBGTI indicates that the retransmission comprises a plurality of CBGs, the CBGFI comprises 1 bit, and the CBGFI indicates whether the plurality of CBGs of the retransmission are affected during initial transmission. Assuming that the initial transmission PDSCH is normally transmitted, the CBGFI indicates that the initial transmissions of several CBGs of this retransmission can participate in combining, and then the LLR1 participates in combining.

Or, the DCI corresponding to the 1 st retransmission PDSCH includes CBGTI and CBGFI, where the CBGTI indicates that the retransmission includes a plurality of CBGs, and the CBGFI includes a plurality of bits, and indicates whether each CB or CBG of the retransmission is affected during initial transmission. Here, if the initial transmission PDSCH is normally transmitted, and the UE determines that several CBs or CBGs of the retransmission are not affected during the initial transmission according to the CBGFI, then LLR1 participates in the combining.

S1005: and the UE calculates LLR corresponding to the first CB in the PDSCH of the 1 st retransmission for the PDSCH of the 1 st retransmission, the LLR is recorded as LLR2, the first CB is decoded by adopting LLR1+ LLR2, the UE fails in decoding, and LLR1+ LLR2 are stored.

Taking LLR1 and LLR1+ LLR2 as examples, LLR1 and LLR1+ LLR2 may be stored in the first memory unit, and may also be stored in the first memory unit and the second memory unit, where the second memory unit is a memory unit allocated for an unscheduled process. For example, LLR1 and LLR1+ LLR2 are both stored in the first memory unit, or LLR1 is stored in the first memory unit and LLR1+ LLR2 is stored in the second memory unit, or LLR1 is stored in the second memory unit and LLR1+ LLR2 is stored in the first memory unit, or LLR1 and LLR1+ LLR2 are both stored in the first memory unit or are stored in the first memory unit and the second memory unit, respectively, depending on one or more values among the transfer unit size, the size of LLR1, and the size of LLR1+ LLR2. It should be understood that the above-mentioned schemes are only examples, and the application does not limit the specific scheme that the LLRs that the UE needs to store occupy the memory unit.

S1006: and for the CBG where the first CB is located, the UE sends NACK to the gNB. Accordingly, the gNB receives a NACK from the UE.

S1007: and the gNB transmits the DCI corresponding to the PDSCH of the 2 nd retransmission and the PDSCH of the 2 nd retransmission. Correspondingly, the UE receives the DCI corresponding to the PDSCH of the 2 nd retransmission and the PDSCH of the 2 nd retransmission.

The DCI corresponding to the PDSCH retransmitted for the 2 nd time comprises CBGTI and CBGFI, the CBGTI indicates that the retransmission comprises a plurality of CBGs, the CBGFI comprises 1 bit, and the CBGFI indicates whether the plurality of CBGs retransmitted for the time are influenced or not when the PDSCH is retransmitted for the 1 st time. Assuming that the 1 st PDSCH retransmission is an abnormal transmission, CBGFI indicates that several CBGs of this retransmission may be affected at the time of the 1 st retransmitted PDSCH, and LLR2 does not participate in the combining.

Or, the DCI corresponding to the PDSCH retransmission for the 2 nd time includes CBGTI and CBGFI, where the CBGTI indicates that the retransmission includes a plurality of CBGs, and the CBGFI includes a plurality of bits, and indicates whether each CB or CBG of the retransmission is affected during the 1 st retransmission. Here, it is assumed that the 1 st PDSCH retransmission is abnormal transmission, the CBGFI corresponding to the first CB indicates that the first CB of the retransmission may be affected during the 1 st retransmission, or the CBGFI corresponding to the CBG where the first CB is located indicates that the CBG where the first CB of the retransmission is located may be affected during the 1 st retransmission, and then the LLR2 does not participate in the combining.

S1008: and the UE calculates LLR corresponding to the first CB in the PDSCH of the 2 nd retransmission for the PDSCH of the 2 nd retransmission, the LLR is recorded as LLR3, the first CB is decoded by LLR1+ LLR3, the UE fails in decoding, and LLR1+ LLR3 are stored.

And the UE determines that LLR2 does not participate in the combination according to the CBGFI, and then the UE selects LLR1 and LLR3 from the stored LLR1 and LLR1+ LLR2 to combine and decode.

Taking the storage of LLR1 and LLR1+ LLR3 as an example, LLR1 and LLR1+ LLR3 may be stored in the first storage unit, and may also be stored in the first storage unit and the second storage unit. For example, LLR1 and LLR1+ LLR3 are both stored in the first memory cell, or LLR1 is stored in the first memory cell, and LLR1+ LLR3 is stored in the second memory cell, or LLR1 is stored in the second memory cell, and LLR1+ LLR3 is stored in the first memory cell, or LLR1 and LLR1+ LLR3 are both stored in the first memory cell, or are stored in the first memory cell and the second memory cell, respectively, depending on one or more values of the transmission cell size, the magnitude of LLR1, and the magnitude of LLR1+ LLR3. It should be understood that the above-mentioned schemes are only examples, and the application does not limit the specific scheme that the LLRs that the UE needs to store occupy the memory unit.

Therefore, by using the method provided in example 1, the data that is normally transmitted before abnormal transmission is used can be combined, and decoding is performed by using the decoding information corresponding to the data that is combined in multiple previous transmissions, so that the PDSCH receiving performance can be improved, and the retransmission probability can be reduced. In addition, under the condition of not increasing the storage space, the LLR which needs to be stored is stored by using the storage space of the unscheduled process, so that the resource utilization rate can be improved.

Example 2: as shown in fig. 11, the decoding method provided in the present application is described for a PI-only scenario.

S1101: and the gNB sends the DCI and the initial PDSCH corresponding to the initial PDSCH of a certain process. Correspondingly, the UE receives the DCI and the initial PDSCH corresponding to the initial PDSCH of the process.

For example, the DCI here may include a HARQ process number, time-frequency resource information of an initial PDSCH, and the like.

S1102: the UE obtains LLRs corresponding to the initial-transmission PDSCH for the initial-transmission PDSCH, and decodes the initial-transmission PDSCH based on the LLRs corresponding to the initial-transmission PDSCH, wherein LLRs of one CB with decoding failure are marked as LLR1 when the CBs with decoding failure are failed, and the CB is marked as a first CB.

S1103: and for the CBG where the first CB is located, the UE sends NACK to the gNB. Accordingly, the gNB receives a NACK from the UE.

S1104: and the gNB sends DCI, the DCI comprises PI, the PI indicates that part of time-frequency resources for transmitting the first CB in the initial transmission PDSCH are preempted, and part of time-frequency resources for transmitting the first CB are not preempted, so that LLR (marked as LLR 11) corresponding to data transmitted on the time-frequency resources which are not preempted participate in combination. Accordingly, the UE receives the PI from the gNB.

The LLR1 includes an LLR (i.e., LLR 11) corresponding to data transmitted on the non-preempted time-frequency resource in the first CB in the initial PDSCH and an LLR corresponding to data transmitted on the preempted time-frequency resource in the first CB in the initial PDSCH.

S1105: and the gNB transmits the DCI corresponding to the 1 st retransmission PDSCH and the 1 st retransmission PDSCH. Correspondingly, the UE receives the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission.

It should be understood that the gNB transmits the DCI (the DCI includes the PI) before the gNB receives the NACK from the UE, or after the gNB receives the NACK from the UE, or before the gNB transmits the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission, or after the gNB transmits the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission, which is not limited in this application.

The UE receiving the DCI (including the PI) may be before the UE receives the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission, or after the UE receives the DCI corresponding to the PDSCH of the 1 st retransmission and the PDSCH of the 1 st retransmission.

S1106: and the UE calculates LLR corresponding to the first CB in the PDSCH of the 1 st retransmission for the PDSCH of the 1 st retransmission, the LLR is recorded as LLR2, the first CB is decoded by adopting LLR11+ LLR2, the UE fails to decode, and the UE saves the LLR11 and the LLR2.

LLRs 11 and LLR2 may be stored in the first memory unit, and may also be stored in the first memory unit and a second memory unit, which is a memory unit allocated for an unscheduled process. For example, LLR11 and LLR2 are both stored in the first storage unit, or LLR11 is stored in the first storage unit and LLR2 is stored in the second storage unit, or LLR11 is stored in the second storage unit and LLR2 is stored in the first storage unit, or based on one or more values of the transmission unit size, the LLR1 size, and the LLR2 size, it is determined whether LLR11 and LLR2 are both stored in the first storage unit or are stored in the first storage unit and the second storage unit, respectively. It should be understood that the above-mentioned schemes are only examples, and the application does not limit the specific scheme that the LLRs that the UE needs to store occupy the memory unit.

S1107: and for the CBG where the first CB is located, the UE sends NACK to the gNB. Accordingly, the gNB receives a NACK from the UE.

S1108: and the gNB sends DCI, the DCI comprises PI, the PI indicates that part of time-frequency resources for transmitting the first CB in the 1 st retransmission PDSCH are preempted, and part of time-frequency resources for transmitting the first CB are not preempted, so that LLR (marked as LLR 22) corresponding to data transmitted on the time-frequency resources which are not preempted participate in combination. Accordingly, the UE receives the PI from the gNB.

The LLR2 includes LLRs (i.e., LLR 22) corresponding to data transmitted on the non-preempted time-frequency resource in the first CB of the PDSCH retransmission 1 and LLRs corresponding to data transmitted on the preempted time-frequency resource in the first CB of the PDSCH retransmission 1.

S1109: and the gNB transmits the DCI corresponding to the PDSCH of the 2 nd retransmission and the PDSCH of the 2 nd retransmission. Correspondingly, the UE receives the DCI corresponding to the PDSCH of the 2 nd retransmission and the PDSCH of the 2 nd retransmission.

S1110: and the UE calculates LLR corresponding to the PDSCH of the 2 nd retransmission for the PDSCH of the 2 nd retransmission, the LLR is recorded as LLR3, the first CB is decoded by adopting LLR11+ LLR22+ LLR3, the UE fails to decode, and the UE saves LLR11+ LLR22 and LLR3.

LLRs 11+ LLR22 and LLR3 may be stored in the first memory unit, and may also be stored in the first memory unit and the second memory unit. For example, LLR11+ LLR22 and LLR3 are both stored in the first memory unit, LLR11+ LLR22 is stored in the first memory unit, LLR3 is stored in the second memory unit, LLR11+ LLR22 is stored in the second memory unit, and LLR3 is stored in the first memory unit, or it is determined whether LLR11+ LLR22 and LLR3 are both stored in the first memory unit or both LLR11+ LLR22 and LLR3 are stored in the first memory unit and the second memory unit, respectively, based on one or more values of the transmission unit size, the LLR11+ LLR22 size, and the LLR3 size. It should be understood that the above-mentioned schemes are only examples, and the application does not limit the specific scheme that the LLRs that the UE needs to store occupy the memory unit.

If the mother code rate of one code block is 1/3, the UE stores 3N LLRs. As shown in fig. 12, the initial transmission is redundancy version 0, the first retransmission is redundancy version 1, white represents data in which the PI indicates a resource is not preempted, and black represents data in which the PI indicates a resource is preempted.

After the initial decoding of the code block fails, the UE stores LLRs (denoted as LLR 1) corresponding to the part 1, the part 2, the part 3, and the part 4 in the initial transmission.

During retransmission for the 1 st time, the UE knows that the time-frequency resources corresponding to the part 1 are preempted according to the PI, and the time-frequency resources corresponding to the

parts

2, 3, and 4 are not preempted, then the LLRs (denoted as LLR 11) corresponding to the

parts

2, 3, and 4, and the LLRs (denoted as LLR 2) corresponding to the

parts

5, 6, and 7 are respectively and correspondingly merged and decoded, and after the decoding fails, 2 parts of LLRs are stored:

the first part: LLR11;

and (2) second part: and LLR2.

And in the retransmission for the 2 nd time, the UE knows that the time-frequency resources corresponding to the part 6 are preempted according to the PI, and the time-frequency resources corresponding to the

parts

5 and 7 are not preempted, then the LLRs (marked as LLRs 22) corresponding to the

parts

5 and 7 in the first LLR11 and the second LLR2, and the LLRs (marked as LLRs 3) corresponding to the

parts

8 and 9 are respectively and correspondingly combined and decoded, and after the decoding fails, 2 LLRs are stored.

The first part: the LLR for combining LLR11 and LLR22 (denoted as LLR11+ LLR 22);

and (2) second part: and LLR3.

The beneficial effect of the decoding method provided by the application can be proved by constructing a simulation test scene. The following description will be made by taking scene 1, scene 2, and scene 3 as examples.

Scene 1:

and initially transmitting the target data without interference, but failing to decode the target data.

CBGFI and PI indicate that the initial transmission is a normal transmission.

And (4) retransmitting the interference data for the 1 st time, wherein the target data is not transmitted and the decoding fails.

CBGFI and PI indicate retransmission 1 as an abnormal transmission.

And the 2 nd retransmission transmits the target data without interference data.

Scene 2:

and initially transmitting the target data without interfering the data, but failing to decode the target data.

And the 1 st retransmission transmits the target data without interfering the data.

For the above scenario 1 and scenario 2, if the performances of the scenario 1 and the scenario 2 are equivalent, for example, the probability that the 2 nd retransmission decoding in the scenario 1 is successful is equivalent to the probability that the 1 st retransmission decoding in the scenario 2 is successful, it is indicated that the scenario 1 adopts the decoding method provided in the embodiment of the present application; if the performance of the scene 1 is poor, for example, the probability that the 2 nd retransmission decoding in the scene 1 is successful is lower than the probability that the 1 st retransmission decoding in the scene 2 is successful, it indicates that the scene 1 does not adopt the decoding method provided by the embodiment of the present application.

Further, when all processes except the process corresponding to the transmission target data are scheduled, a maximum Transport Block Size (TBS) is scheduled, the performance of the scene 1 is poorer than that of the scene 2, a smaller TBS is scheduled, and the performance of the scene 1 is equivalent to that of the scene 2, which indicates that the UE uses the remaining storage space of the scheduled process to store the decoding information to be stored.

Further, when all processes except the process corresponding to the transmission target data are scheduled, the performance of the scenario 1 is worse than the performance 2 of the scenario, and when other processes except the process corresponding to the transmission target data are not scheduled, the performance of the scenario 1 is equivalent to the performance of the scenario 2, which indicates that the UE uses the storage space of other processes not scheduled to store the decoding information in the scenario 1.

In summary, it is known from the simulation result that the retransmission probability can be effectively reduced by using the method provided by the embodiment of the present application.

In the embodiments provided in the present application, in order to implement the above functions, the terminal device includes a hardware structure and/or a software module corresponding to executing each function. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Similar to the above concept, as shown in fig. 13, an embodiment of the present application further provides an apparatus 1300, where the apparatus 1300 includes a transceiver 1302 and a processing unit 1301.

In an example, the apparatus 1300 is configured to implement the function of the terminal device in the foregoing method. The device may be a terminal device, or may be a device in a terminal device, such as a system on a chip.

A transceiving unit 1302, configured to receive data retransmitted at the kth time from a network device, where k is a positive integer greater than or equal to 2;

a transceiving unit 1302, configured to receive indication information from a network device;

a processing unit 1301, configured to determine that the received data from the network device retransmitted for the (k-1) th time participates in combining according to the indication information, and perform decoding based on the first combining result, decoding information corresponding to the data retransmitted for the (k-1) th time, and the data retransmitted for the (k) th time;

at least one data participating in combination exists from the received initial transmission data from the network equipment to the received data of the k-2 th retransmission from the network equipment, and the first combination result is determined based on the decoding information corresponding to the at least one data participating in combination.

For specific execution procedures of the processing unit 1301 and the transceiver unit 1302, reference may be made to the descriptions in the above embodiments. The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

As another alternative variation, the device may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. Illustratively, the apparatus comprises a processor and an interface circuit for receiving code instructions and transmitting them to the processor; the processor executes the code instructions to perform the methods of the various embodiments described above. The processor completes the functions of the processing unit 1301, and the interface circuit completes the functions of the transceiver unit 1302.

Similar to the above concept, as shown in fig. 14, the embodiment of the present application further provides an apparatus 1400. The apparatus 1400 includes: a communications interface 1401, at least one processor 1402, at least one memory 1403. A communications interface 1401 for communicating with other devices via a transmission medium, such that the apparatus used in apparatus 1400 may communicate with other devices. A memory 1403 for storing the computer program. The processor 1402 calls the computer program stored in the memory 1403 to send and receive data through the communication interface 1401 to implement the method in the above-described embodiment.

Illustratively, when the apparatus is a terminal device, the memory 1403 is used for storing a computer program; the processor 1402 calls the computer program stored in the memory 1403 to execute the method performed by the terminal device in the above-described embodiment through the communication interface 1401.

In an embodiment of the present application, the communication interface 1401 may be a transceiver, circuit, bus, module, or other type of communication interface. The processor 1402 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The memory 1403 may be a non-volatile memory, such as a hard disk or solid state disk, and may also be a volatile memory, such as a random access memory. The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a memory function. The memory 1403 is coupled to the processor 1402. The coupling in the embodiments of the present application is a spaced coupling or communication connection between devices, units or modules, and may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. As another implementation, the memory 1403 may also be located external to the apparatus 1400. The processor 1402 may operate in conjunction with the memory 1403. Processor 1402 may execute program instructions stored in memory 1403. At least one of the at least one memory 1403 may also be included in the processor 1402. The connection medium between the communication interface 1401, the processor 1402, and the memory 1403 is not limited in the embodiment of the present application. For example, in fig. 14, the memory 1403, the processor 1402, and the communication interface 1401 of the embodiment of the present application may be connected via a bus, which may be divided into an address bus, a data bus, a control bus, and the like.

It will be appreciated that the apparatus in the embodiment shown in fig. 13 described above may be implemented as the apparatus 1400 shown in fig. 14. In particular, the processing unit 1301 may be implemented by the processor 1402, and the transceiving unit 1302 may be implemented by the communication interface 1401.

Embodiments of the present application further provide a computer-readable storage medium, which stores a computer program, and when the computer program runs on a computer, the computer is caused to execute the methods shown in the foregoing embodiments.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, network appliance, user equipment, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). 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, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital Video Disk (DVD)), or a semiconductor medium (e.g., solid state disk), among others.

The above embodiments are only used to describe the technical solutions of the present application in detail, but the above embodiments are only used to help understanding the method of the embodiments of the present application, and should not be construed as limiting the embodiments of the present application. Modifications and substitutions that may occur to those of ordinary skill in the art are intended to be included within the scope of the embodiments of the present application.

Claims

1. A method of decoding, the method comprising:

receiving data retransmitted at the kth time from network equipment, wherein k is a positive integer greater than or equal to 2;

receiving indication information from the network equipment;

determining that the received data retransmitted from the network equipment at the k-1 th time participate in merging according to the indication information, and decoding based on a first merging result, decoding information corresponding to the data retransmitted at the k-1 th time and the data retransmitted at the k-th time;

at least one piece of data participating in combining exists from the initial data received from the network device to the data received from the network device in the k-2 nd retransmission, and the first combining result is determined based on the decoding information corresponding to the at least one piece of data participating in combining respectively.

2. The method of claim 1, wherein the determining that the data retransmitted for the (k-1) th time received from the network device participates in the combining according to the indication information, and decoding based on the first combining result, the decoding information corresponding to the data retransmitted for the (k-1) th time and the data retransmitted for the (k) th time comprises:

and determining that the data retransmitted for the (k-1) th time participates in combination according to the indication information, and decoding based on a second combination result and the data retransmitted for the (k) th time, wherein the second combination result is a combination result obtained by combining the first combination result and decoding information corresponding to the data retransmitted for the (k-1) th time.

3. The method according to claim 1 or 2, wherein the indication information includes code block group erasure information CBGFI;

the determining that the data received from the k-1 th retransmission of the network device participates in the combining according to the indication information includes:

when the CBGFI is used for indicating that the reception of the data retransmitted for the (k-1) th time is possibly not influenced, determining that the data retransmitted for the (k-1) th time participates in combination;

and the data retransmitted at the k-1 th time is one or more coding blocks CB retransmitted at the k-1 th time or one or more coding block groups CBG.

4. A method as claimed in claim 1 or 2, wherein said indication information comprises a preemption indication PI;

the determining that the received data from the k-1 th retransmission of the network device participates in the combining according to the indication information includes:

when the PI is used for indicating that time-frequency resources used for transmitting the data retransmitted for the (k-1) th time are not preempted, determining that the data retransmitted for the (k-1) th time participate in combination;

5. The method of claim 1 or 2, further comprising:

when decoding and decoding based on the first combination result, the decoding information corresponding to the k-1 th retransmitted data and the k-1 th retransmitted data fails, storing a third combination result and the decoding information corresponding to the k-1 th retransmitted data, wherein the third combination result is a combination result of combining the first combination result and the decoding information corresponding to the k-1 th retransmitted data.

6. The method of claim 5, wherein the third combination result and the decoding information corresponding to the kth retransmitted data are stored in a first storage unit, or a first storage unit and a second storage unit, wherein the first storage unit is a storage unit allocated to a process scheduled by the first transmitted data to the kth retransmitted data, and the second storage unit is a storage unit allocated to any one unscheduled process.

7. The method of claim 2, further comprising:

and when decoding and decoding based on the second combination result and the data retransmitted at the k time fail, storing a second combination result and a fourth combination result, wherein the fourth combination result is a combination result obtained by combining the second combination result and decoding information corresponding to the data retransmitted at the k time.

8. The method of claim 7, wherein the second combination result and the fourth combination result are stored in a first storage unit, or a first storage unit and a second storage unit, wherein the first storage unit is a storage unit allocated to a process scheduled for the data from the first transmission to the k retransmission, and the second storage unit is a storage unit allocated to any one unscheduled process.

9. The method of any of claims 1, 2, 6, 7, 8, further comprising:

receiving the initial transmission data from the network equipment;

when the decoding of the initially transmitted data fails, storing decoding information corresponding to the initially transmitted data;

receiving data of 1 st retransmission from the network equipment;

and when the initial transmission data participates in combination and decoding is failed based on the decoding information corresponding to the initial transmission data and the 1 st retransmission data, storing the decoding information corresponding to the initial transmission data and a combination result of combining the decoding information corresponding to the initial transmission data and the decoding information corresponding to the 1 st retransmission data.

10. The method according to claim 9, wherein decoding information corresponding to the initially transmitted data, and a combination result of combining the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the data retransmitted for the 1 st time are stored in a first storage unit, or a first storage unit and a second storage unit, wherein the first storage unit is a storage unit allocated to a process scheduled for the data from the initially transmitted data to the k-th retransmission, and the second storage unit is a storage unit allocated to any non-scheduled process.

11. The method of any of claims 1, 2, 6, 7, 8, further comprising:

receiving the initial transmission data from the network equipment;

when the decoding of the initial transmission data fails, storing decoding information corresponding to the initial transmission data;

receiving data of 1 st retransmission from the network equipment;

and when the initial transmission data participates in combination, and decoding is failed based on the decoding information corresponding to the initial transmission data and the data retransmitted for the 1 st time, storing the decoding information corresponding to the initial transmission data and the decoding information corresponding to the data retransmitted for the 1 st time.

12. The method according to claim 11, wherein the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data are stored in a first storage unit or a first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled for the initially transmitted data to the k-th retransmitted data, and the second storage unit is a storage unit allocated to any one unscheduled process.

13. The method according to any of claims 1, 2, 6, 7, 8, 10, 12, wherein the indication information is carried by a medium access control element, MAC-CE, or radio resource control, RRC, signaling.

14. A decoding apparatus, characterized in that the apparatus comprises:

a transceiving unit, configured to receive data retransmitted for the kth time from a network device, where k is a positive integer greater than or equal to 2;

the transceiver unit is further configured to receive indication information from the network device;

the processing unit is used for determining that the received data retransmitted from the network equipment at the k-1 th time participate in merging according to the indication information, and decoding the data retransmitted at the k-1 th time based on a first merging result, decoding information corresponding to the data retransmitted at the k-1 th time and the data retransmitted at the k-th time;

at least one data participating in combination exists from the initial data received from the network device to the data received from the network device in the k-2 th retransmission, and the first combination result is determined based on the decoding information corresponding to the at least one data participating in combination.

15. The apparatus of claim 14, wherein the processing unit is configured to determine that the data retransmitted for the (k-1) th time participates in combining according to the indication information, and perform decoding based on a second combining result and the data retransmitted for the (k) th time, where the second combining result is a combining result obtained by combining the first combining result and decoding information corresponding to the data retransmitted for the (k-1) th time.

16. The apparatus of claim 14 or 15, wherein the indication information comprises CBGFI;

the processing unit is configured to determine that the data retransmitted for the (k-1) th time participates in merging when the CBGFI is used to indicate that the reception of the data retransmitted for the (k-1) th time may not be affected;

wherein, the data retransmitted for the (k-1) th time is one or more CBs or one or more CBGs retransmitted for the (k-1) th time.

17. The apparatus according to claim 14 or 15, wherein the indication information includes a PI;

the processing unit is configured to determine that the data retransmitted for the (k-1) th time participates in merging when the PI indicates that time-frequency resources used for transmitting the data retransmitted for the (k-1) th time are not preempted;

and the data retransmitted for the (k-1) th time is the data retransmitted for the (k-1) th time on one time-frequency resource indicated by the PI.

18. The apparatus according to claim 14 or 15, wherein the processing unit is further configured to store a third combining result and the decoding information corresponding to the data retransmitted at the k-th time when decoding and decoding based on the first combining result, the decoding information corresponding to the data retransmitted at the k-1 th time, and the data retransmitted at the k-th time fails, where the third combining result is a combining result of combining the first combining result and the decoding information corresponding to the data retransmitted at the k-1 th time.

19. The apparatus according to claim 18, wherein the third combination result and the decoding information corresponding to the data retransmitted at the k-th time are stored in a first storage unit, or a first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled by the data retransmitted from the first time to the k-th time, and the second storage unit is a storage unit allocated to any one unscheduled process.

20. The apparatus of claim 15, wherein the processing unit is further configured to store a second combining result and a fourth combining result when decoding based on the second combining result and the kth retransmitted data fails, and the fourth combining result is a combining result of combining the second combining result and decoding information corresponding to the kth retransmitted data.

21. The apparatus of claim 20, wherein the second combining result and the fourth combining result are stored in a first storage unit, or a first storage unit and a second storage unit, the first storage unit being a storage unit allocated to a process scheduled for the data from the first transmission to the k-th retransmission, and the second storage unit being a storage unit allocated to any one unscheduled process.

22. The apparatus according to any of claims 14, 15, 19, 20, 21, wherein the transceiver unit is further configured to receive the initial transmission data from the network device;

the processing unit is further configured to store decoding information corresponding to the initial transmission data when the decoding of the initial transmission data fails;

the transceiver unit is further configured to receive data retransmitted for the 1 st time from the network device;

the processing unit is further configured to store decoding information corresponding to the initially transmitted data and a combination result obtained by combining the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data when the initially transmitted data participates in combination and decoding based on the decoding information corresponding to the initially transmitted data and the 1 st retransmitted data fails to decode.

23. The apparatus according to claim 22, wherein decoding information corresponding to the initially transmitted data, and a combination result of combining the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the data retransmitted for the 1 st time are stored in a first storage unit, or a first storage unit and a second storage unit, the first storage unit is a storage unit allocated to a process scheduled for the data from the initially transmitted data to the retransmitted for the kth time, and the second storage unit is a storage unit allocated to any one of unscheduled processes.

24. The apparatus according to any one of claims 14, 15, 19, 20, and 21, wherein the transceiver unit is further configured to receive the initial transmission data from the network device;

the processing unit is further configured to store decoding information corresponding to the initially transmitted data and decoding information corresponding to the 1 st retransmitted data when the initially transmitted data participates in merging and decoding fails based on decoding information corresponding to the initially transmitted data and the 1 st retransmitted data.

25. The apparatus according to claim 24, wherein the decoding information corresponding to the initially transmitted data and the decoding information corresponding to the 1 st retransmitted data are stored in a first storage unit or a first storage unit and a second storage unit, the first storage unit is a storage unit allocated for a process scheduled for the initially transmitted data to the k-th retransmitted data, and the second storage unit is a storage unit allocated for any non-scheduled process.

26. The apparatus of any one of claims 14, 15, 19, 20, 21, 23, 25, wherein the indication information is carried by MAC-CE or RRC signaling.

27. A communication device comprising a processor and a memory;

the memory is used for storing computer execution instructions;

the processor is configured to execute computer-executable instructions stored by the memory to cause the communication device to perform the method of any of claims 1-13.

28. A communication device comprising a processor and interface circuitry;

the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor; the processor executes the code instructions to perform the method of any of claims 1 to 13.

29. A readable storage medium for storing instructions that, when executed, cause the method of any one of claims 1 to 13 to be implemented.

30. A communication system, characterized in that it comprises a network device and a terminal device, said terminal device performing the method according to any one of claims 1 to 13.