CN111769911A - Data repeat transmission method - Google Patents

Data repeat transmission method Download PDF

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Publication number
CN111769911A
CN111769911A CN201910260223.4A CN201910260223A CN111769911A CN 111769911 A CN111769911 A CN 111769911A CN 201910260223 A CN201910260223 A CN 201910260223A CN 111769911 A CN111769911 A CN 111769911A
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frequency domain
time unit
time
domain resource
equal
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CN111769911B (en
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丁梦颖
汪凡
廖树日
胡远洲
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2020/078758 priority patent/WO2020199874A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

An embodiment of the present application provides a data transmission method, including: terminal equipment to KTK in one time unitT，SA time unit in the KT，SEach time unit of Kt，FA frequency domain resource, repeatedly transmitting a transport block TB; wherein, KTIs a positive integer, KT，SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly transmitting the TB once, and t is a value range from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2. When the method is applied to an authorization-free transmission scene, the method can improveThe collision probability among the terminal devices in the unauthorized transmission scene can be improved, so that the decoding accuracy of the transmitted data can be improved, and the data transmission rate can be improved.

Description

Data repeat transmission method
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a data repeated transmission method.
Background
In a wireless communication system, network devices and terminals may communicate wirelessly based on various multiple access techniques, such as: code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), or non-orthogonal multiple access (NOMA), etc.
When the network device and the terminal perform wireless communication, uplink data transmission may be performed, for example, the terminal sends data to the network device; downlink data transmission may also be performed, for example, the network device sends data to the terminal.
Disclosure of Invention
In a first aspect, a data transmission method is provided, including: for KTK in one time unitT,SA time unit in the KT,SEach time unit of Kt,FA frequency domain resource, repeatedly transmitting a transport block TB; wherein, KTIs a positive integer, KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly transmitting the TB once, and t is a value range from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2. By the method, repeated transmission is introduced in the time domain and the frequency domain, so that the collision probability between the UE can be reduced, and the data transmission rate can be improved.
In one possible implementation, the KTK for each of the time unitst，FIs equal to KFSaid K isFEach of the frequency domain resources includes NsubA number of RBs, the size of the TB being according to the NsubIs determined in which NsubIs a positive integer. By the method, the design of the frequency domain resources is simplified, and simultaneously, each frequency domain resource can have the same decoding correct probability, so that each frequency domain resource is free from being decodedThe granted transmission resources may support high data transmission rates.
In one possible implementation, the KTK for each of the time unitst，FIs equal to KFSaid K isFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000011
RB, wherein i is a value ranging from 1 to KFThe size of the TB is according to the KFAn
Figure BDA0002015069360000012
Is determined from the average of (a). By the method, in a scene of flexibly configuring frequency domain resources, the TBS is determined based on the average value of the frequency domain resources, and balance can be obtained between high decoding accuracy and high system data transmission rate.
In one possible implementation, the KTK for each of the time unitst，FIs equal to KFSaid K isFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000013
RB, wherein i is a value ranging from 1 to KFThe size of the TB is according to the KFAn
Figure BDA0002015069360000014
Is determined. By the method, the more conservative TBS is determined based on the minimum frequency domain resource, the decoding correct probability can be improved as much as possible, and the transmission delay of data is reduced.
In one possible implementation, the KTK for each of the time unitst，FIs equal to KFThe size of the TB is determined according to the number of RBs included in the reference frequency domain resource
Figure BDA0002015069360000015
The method comprises the steps of determining, wherein,
Figure BDA0002015069360000016
is a positive integer, said KFThe reference frequency domain resource is included in the frequency domain resources. By the method, the TBS can be flexibly designed according to the channel condition. For example, when the channel condition is good, a larger frequency domain resource is set as a reference frequency domain resource, and when the channel condition is poor, a smaller frequency domain resource is set as a reference frequency domain resource, so that a higher decoding accuracy can be ensured, the transmission delay of data can be reduced, and a higher system transmission rate can be obtained.
In one possible implementation, the size of the TB is according to a first reference value NrefIs determined in which NrefIs a positive integer. By the method, the design of TBS can be simplified, thereby simplifying the complexity of system design.
In one possible implementation, when the TB is transmitted, the method includes performing channel coding on the TB and performing rate matching according to a redundancy version, RV; at kth time unitfWhen the TB is transmitted on a frequency domain resource, the first time in the RV sequence is used
Figure BDA0002015069360000021
Rate matching is carried out on the RVs, wherein the RV sequences comprise
Figure BDA0002015069360000022
The number of the RV is one,
Figure BDA0002015069360000023
is a positive integer, kfIs a value ranging from 1 to Kt,FInteger of (a), K0，FEqual to 0. By the method, interference resistance or noise resistance can be better realized when the TB is repeatedly transmitted, so that the decoding accuracy of the TB is improved, and the data transmission rate can be improved.
In one possible implementation, the K at the t time unitt,FWhen the TB is repeatedly transmitted in a frequency domain resource, the K ist,FBy K in one frequency domain resourcet,FRepeatedly transmitting the TB by a plurality of PUSCHs; the method also comprises: sending the Kt,FK of PUSCHt,FA demodulation reference signal (DMRS); wherein, K ist,FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt,FThe set of scrambling values includes Kt,FA scrambling value. By the method, when the UE of different cells uses the same time-frequency resource for repeated transmission, the interference between the UE of different cells can be reduced by independently setting the sequence value for each DMRS. In one possible implementation, the sequence value of each DMRS is according to KFAnd (4) determining. By the method, the interference between data transmission with different repetition times can be reduced, and the data transmission rate of the system can be improved.
In a second aspect, a data transmission method is provided, including: for KTK in one time unitT,SA time unit in the KT,SEach time unit of Kt,FA frequency domain resource repeatedly receiving a transport block, TB; wherein, KTIs a positive integer, KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly receiving the TB once, and t is a value ranging from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2.
In a possible implementation, the method for determining the size of the TB is described in the first aspect, and is not described herein again.
In one possible implementation, receiving the TB includes performing channel decoding on the TB and performing rate de-matching according to a redundancy version, RV; at kth time unitfWhen receiving the TB on a frequency domain resource, using the first time in the RV sequence
Figure BDA0002015069360000024
Performing rate de-matching on the RVs, wherein the RV sequence comprises
Figure BDA0002015069360000025
The number of the RV is one,
Figure BDA0002015069360000026
is a positive integer, kfIs a value ranging from 1 to Kt,FInteger of (a), K0，FEqual to 0.
In one possible implementation, the K at the t time unitt,FRepeatedly receiving the TB in one frequency domain resource, at the Kt,FBy K in one frequency domain resourcet,FRepeatedly receiving the TB by a plurality of PUSCHs; the method further comprises the following steps: receiving the Kt,FK of PUSCHt,FA demodulation reference signal (DMRS); wherein, K ist,FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt,FThe set of scrambling values includes Kt,FA scrambling value.
In a third aspect, an apparatus is provided, where the apparatus may be a terminal device, may also be an apparatus in a terminal device, or may be an apparatus capable of being used in cooperation with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a communication module. In an exemplary manner, the first and second electrodes are,
the communication module is used for pairing KTK in one time unitT,SA time unit in the KT,SEach time unit of Kt,FA frequency domain resource, repeatedly transmitting a transport block TB; wherein, KTIs a positive integer, KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FA frequency domain resourceOne frequency domain resource in the source is used for repeatedly sending the TB once, and t is a value range from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2. The processing module is configured to generate the TB.
In one possible implementation, the processing module is to determine a size of the TB. The method for determining the size of the TB is described in the first aspect, and is not described herein again.
In one possible implementation, when the processing module transmits the TB by using the communication module, the processing module is configured to perform channel coding on the TB. The channel coding method is the same as that described in the first aspect, and is not described herein again.
In one possible implementation, the processing module utilizes the K of the communication module at the t time unitt,FWhen the TB is repeatedly transmitted in a frequency domain resource, the K ist,FBy K in one frequency domain resourcet,FRepeatedly transmitting the TB by a plurality of PUSCHs; the processing module further utilizes the communication module to: sending the Kt,FK of PUSCHt,FA demodulation reference signal (DMRS); wherein, K ist,FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt,FThe set of scrambling values includes Kt,FA scrambling value.
In a fourth aspect, an apparatus is provided, where the apparatus may be a network device, an apparatus in a network device, or an apparatus capable of being used in cooperation with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a communication module. In an exemplary manner, the first and second electrodes are,
the communication module is for KTK in one time unitT,SOne hourA unit of betweenT,SEach time unit of Kt,FA frequency domain resource repeatedly receiving a transport block, TB; wherein, KTIs a positive integer, KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly receiving the TB once, and t is a value ranging from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2. The processing module is used for processing the TB.
In one possible implementation, the processing module is to determine a size of the TB. The method for determining the size of the TB is as described in the second aspect, and is not described herein again.
In one possible implementation, when the processing module receives the TB with the communication module, the processing module is configured to perform channel decoding on the TB. The channel decoding method is the same as that described in the second aspect, and is not described herein again.
In one possible implementation, the processing module utilizes the K of the communication module at the t time unitt,FRepeatedly receiving the TB in one frequency domain resource, at the Kt,FBy K in one frequency domain resourcet,FRepeatedly receiving the TB by a plurality of PUSCHs; the processing module further utilizes the communication module to: receiving the Kt,FK of PUSCHt,FA demodulation reference signal (DMRS); wherein, K ist,FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt,FThe set of scrambling values includes Kt,FA scrambling value.
In a fifth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the first aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:
a memory for storing program instructions;
a processor to, with a communication interface: for KTK in one time unitT,SA time unit in the KT,SEach time unit of Kt,FA frequency domain resource, repeatedly transmitting a transport block TB; wherein, KTIs a positive integer, KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly transmitting the TB once, and t is a value range from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2.
In one possible implementation, the processor is configured to determine a size of the TB. The method for determining the size of the TB is described in the first aspect, and is not described herein again.
In one possible implementation, when the processor transmits the TB using the communication interface, the processor is configured to channel code the TB. The channel coding method is the same as that described in the first aspect, and is not described herein again.
In one possible implementation, the processor utilizes the communication interface to determine the K at the tth time unitt,FWhen the TB is repeatedly transmitted in a frequency domain resource, the K ist,FBy K in one frequency domain resourcet,FRepeatedly transmitting the TB by a plurality of PUSCHs; the processor further to: sending the Kt,FK of PUSCHt,FA demodulation reference signal (DMRS); wherein, K ist,FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt,FThe set of scrambling values includes Kt,FA scrambling value.
In a sixth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the second aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the second aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:
a memory for storing program instructions;
a processor to, with a communication interface: for KTK in one time unitT,SA time unit in the KT,SEach time unit of Kt,FA frequency domain resource repeatedly receiving a transport block, TB; wherein, KTIs a positive integer, KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly receiving the TB once, and t is a value ranging from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2.
In one possible implementation, the processor is configured to determine a size of the TB. The method for determining the size of the TB is as described in the second aspect, and is not described herein again.
In one possible implementation, the processor is configured to channel decode the TB when the processor receives the TB using the communication interface. The channel decoding method is the same as that described in the second aspect, and is not described herein again.
In one possible implementation, the processor utilizes the communication interface to determine the K at the tth time unitt,FRepeatedly receiving the TB in one frequency domain resource, at the Kt,FBy K in one frequency domain resourcet,FRepeatedly receiving the TB by a plurality of PUSCHs; the processor further to: receiving the Kt,FK of PUSCHt,FA demodulation reference signal (DMRS); wherein, K ist,FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt,FThe set of scrambling values includes Kt,FA scrambling value.
In a seventh aspect, embodiments of the present application further provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the second aspect.
In an eighth aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method of the first aspect or the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.
In a ninth aspect, this application further provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first or second aspect.
In a tenth aspect, the present embodiments provide a system including the apparatus of the third aspect and the apparatus of the fourth aspect, or including the apparatus of the fifth aspect and the apparatus of the sixth aspect.
Drawings
Fig. 1 is a schematic flow chart illustrating a data transmission method according to an embodiment of the present application;
fig. 2 is a diagram illustrating an example of unlicensed time domain resources provided in an embodiment of the present application;
FIG. 3 is a diagram illustrating an example of a resource grid provided by an embodiment of the present application;
fig. 4 is a diagram illustrating an example of unlicensed frequency domain resources provided in an embodiment of the present application;
fig. 5 is a diagram illustrating an example of an unlicensed time-frequency resource provided in an embodiment of the present application;
fig. 6 is a diagram illustrating an example of channel coding provided by an embodiment of the present application;
fig. 7 is a diagram illustrating an example of rate matching provided by an embodiment of the present application;
fig. 8 is a diagram illustrating an example of redundancy versions used in rate matching according to an embodiment of the present application;
fig. 9 is a diagram illustrating an example of DMRS transmission provided in an embodiment of the present application;
fig. 10 and fig. 11 are schematic structural diagrams of an apparatus provided in an embodiment of the present application.
Detailed Description
The technical scheme provided by the embodiment of the application can be applied to various communication systems. Illustratively, the technical solution may be applied to a communication system capable of supporting repeated transmission of data. For example, the solution can be applied to, but is not limited to: a fifth generation (5G) mobile communication system, a Long Term Evolution (LTE) system, or a future mobile communication system. Among them, 5G may also be referred to as New Radio (NR).
In a communication system, the technical scheme provided by the embodiment of the application can be applied to wireless communication between communication devices. The communication device may include a network device and a terminal device. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, or wireless communication between a terminal device and a terminal device. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "signal transmission", "information transmission", or "transmission", or the like. In embodiments of the present application, the transmission may comprise sending or receiving. For example, the transmission may be uplink transmission, for example, the terminal device may send data to the network device; the transmission may also be downlink transmission, and for example, may be that the network device sends data to the terminal device. The technical solution can also be used for performing wireless communication between other scheduling entities and other subordinate entities, for example, wireless communication between a macro base station and a micro base station, for example, wireless communication between a first terminal device and a second terminal device in device-to-device (D2D) communication.
When the technical scheme provided by the embodiment of the application is applied to a communication system, the technical scheme can be applied to various access technologies. For example, it can be applied to an Orthogonal Multiple Access (OMA) technology or a non-orthogonal multiple access (NOMA) technology. When the technical scheme provided by the embodiment of the present application is applied to an orthogonal multiple access technology, the technical scheme may be applied to technologies such as Orthogonal Frequency Division Multiple Access (OFDMA) or single carrier frequency division multiple access (SC-FDMA), and the embodiment of the present application is not limited. When the technical scheme provided in the embodiment of the present application is applied to a non-orthogonal multiple access technology, the technical scheme may be applied to Sparse Code Multiple Access (SCMA), multi-user shared access (MUSA), Pattern Division Multiple Access (PDMA), Interleaved Grid Multiple Access (IGMA), Resource Spreading Multiple Access (RSMA), non-orthogonal code multiple access (NCMA), or non-orthogonal code multiple access (noc), and the present application embodiment is not limited.
The terminal device related to the embodiment of the present application may be simply referred to as a terminal, and may be a device having a wireless transceiving function. The terminal can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a User Equipment (UE). The UE includes a handheld device, an in-vehicle device, a wearable device, or a computing device with wireless communication capabilities. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart volume), and so on. In the embodiment of the present application, the apparatus for implementing the function of the terminal may be a terminal; it may also be a device, such as a system-on-chip, capable of supporting the terminal to implement the function, which may be installed in the terminal. 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. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal is a terminal, and the terminal is a UE as an example, the technical solution provided in the embodiment of the present application is described.
The network device according to the embodiment of the present application includes a Base Station (BS), which may be a device deployed in a radio access network and capable of performing wireless communication with a terminal. The base station may have various forms, such as a macro base station, a micro base station, a relay station, an access point, and the like. For example, the base station related to the embodiment of the present application may be a base station in 5G or a base station in LTE, where the base station in 5G may also be referred to as a Transmission Reception Point (TRP) or a gnb (generation nodeb). In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device; or may be a device, such as a system-on-chip, capable of supporting the network device to implement the function, and the device may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is a network device, and the network device is a base station, which is taken as an example, to describe the technical solution provided in the embodiment of the present application.
When the base station and the UE perform uplink data transmission, the UE may send an uplink data channel to the base station, for example, send a Physical Uplink Shared Channel (PUSCH) or other uplink data channels. The uplink data channel may carry data information, which may be delivered by a Medium Access Control (MAC) layer of the UE to a physical layer of the UE. In the embodiment of the present application, the uplink channel is the PUSCH. The transmission of PUSCH may be based on either a grant-based scheduling or an unlicensed scheduling.
When transmitting PUSCH based on authorized scheduling, the UE may send a Scheduling Request (SR) to the base station; after receiving the SR, the base station can send scheduling information to the UE through dynamic signaling for one-time transmission of the PUSCH, wherein the scheduling information comprises the transmission parameters of the PUSCH; the UE transmits PUSCH to the base station based on the transmission parameters. In the embodiment of the present application, the transmission parameters of the PUSCH may include one or more of the following transmission parameters: resource configuration information (e.g., Resource Block (RB) allocation information), Modulation and Coding Scheme (MCS), Redundancy Version (RV) configuration information, hybrid automatic repeat request (HARQ) information, and power control commands. In the embodiments of the present application, the plurality may be 2, 3, 4 or more, and the embodiments of the present application are not limited.
In the embodiment of the present application, the signaling may be semi-static signaling and/or dynamic signaling. In the embodiments of the present application, the feature a and/or the feature B may represent the feature a, the feature B, or the feature a and the feature B. In an extensible manner, "feature a, and/or feature B, and/or feature C" may represent feature a, feature B, feature C, feature a and feature B, features a and C, or feature a and feature B and feature C.
The semi-static signaling may be Radio Resource Control (RRC) signaling, broadcast messages, system messages, or MAC Control Elements (CEs). The broadcast message may include a Remaining Minimum System Information (RMSI).
The dynamic signaling may be physical layer signaling. The physical layer signaling may be signaling carried by a physical control channel or signaling carried by a physical data channel. The physical data channel may be a downlink channel, such as a Physical Downlink Shared Channel (PDSCH). The physical control channel may be a Physical Downlink Control Channel (PDCCH), an Enhanced Physical Downlink Control Channel (EPDCCH), a Narrowband Physical Downlink Control Channel (NPDCCH), or a machine communication physical downlink control channel (MTC) MPDCCH. The signaling carried by the PDCCH or EPDCCH may also be referred to as Downlink Control Information (DCI). The physical control channel may also be a physical side link control channel (physical side link control channel), and signaling carried by the physical side link control channel may also be referred to as side link control information (SCI).
When the PUSCH is transmitted based on the authorization-free scheduling, the transmission parameters of the PUSCH can be pre-configured, or the base station can send scheduling information to the UE through semi-static signaling, wherein the scheduling information comprises the transmission parameters of the PUSCH; the UE may transmit one or more PUSCHs to the base station based on the transmission parameters. In the embodiment of the present application, the plurality of times may be 2 times, 3 times, 4 times or more, and the embodiment of the present application is not limited.
In the embodiment of the present application, the unlicensed scheduling may also be referred to as non-dynamic scheduling (non-dynamic scheduling) or other names, and the unlicensed scheduling may also be referred to as non-dynamic grant (non-dynamic grant), configured grant (configured grant) or other names. The scheduling transmission PUSCH based on the grant-free scheme may also be referred to as data transmission based on the grant-free scheme, grant-free transmission, schedule-free transmission, configuration grant transmission (grant with configured grant), or other names, and the embodiment of the present application is not limited thereto. For unlicensed transmission, the transmission parameters of the PUSCH may be referred to as unlicensed transmission parameters, e.g., the resources of the PUSCH may be referred to as unlicensed transmission resources or unlicensed resources, which include frequency domain resources and/or time domain resources.
The unlicensed transmission may be applied to various services, such as voice over internet protocol (VoIP) service or low latency service. VoIP traffic is typically triggered periodically and the packets of VoIP traffic are small. When the VoIP service is transmitted based on the scheduling without authorization, compared with the VoIP service transmitted based on the scheduling without authorization, the transmission of a large amount of dynamic signaling can be avoided, and thus the signaling overhead can be saved. Low latency traffic requires that the end-to-end transmission latency be less than or equal to a threshold, such as less than or equal to 1 millisecond (ms). Compared with the scheduling transmission of the low-delay service based on the authorization, the scheduling transmission of the low-delay service based on the authorization can avoid multiple signaling interaction between the UE and the base station, for example, the interaction between the SR and the dynamic signaling between the UE and the base station, thereby reducing the transmission delay of the low-delay service.
For unlicensed transmissions, one may consider: a base station configures transmission parameters of a PUSCH (physical uplink shared channel) for UE (user equipment) in advance, such as time domain resources, frequency domain resources, transmission periods and the like of the PUSCH; when the UE needs to send data to the base station, the transmission parameters can be used for sending the PUSCH to the base station on the authorization-free transmission resources, and the transmission parameters of the PUSCH do not need to be acquired additionally through signaling interaction; when the UE does not need to send data to the base station, or the MAC layer of the UE does not deliver (transport block, TB) sent on the unlicensed transport resource to the physical layer, the UE does not send PUSCH on the unlicensed transport resource to the base station. In addition, the base station may also activate or deactivate (release) transmission parameters of the unlicensed PUSCH, and when the transmission parameters of the PUSCH are in an activated state, the UE may transmit the PUSCH using the transmission parameters, and when the transmission parameters of the PUSCH are in a deactivated state, the UE may not transmit the PUSCH using the transmission parameters. When a large number of UEs using unlicensed transmission exist in the system, the unlicensed transmission resources configured by the base station for different UEs may be the same, and therefore contention transmission between multiple UEs may exist, for example, multiple UEs transmit a PUSCH to the base station on the same resource, and data of the multiple UEs collide, so that the base station cannot correctly decode the PUSCHs of the multiple UEs.
In order to reduce the collision probability among UEs in the unlicensed transmission, embodiments of the present application provide a corresponding data transmission method, apparatus, and system. The method can be applied to various communication scenarios: for example, the UE sends data to the base station, or the micro base station sends data to the macro base station in a wireless backhaul scenario, and the like. In the embodiment of the present application, data transmission from a UE to a base station is described as an example.
Fig. 1 is a schematic flowchart of an unlicensed transmission method according to an embodiment of the present application, in which a UE repeatedly sends a TB to a base station in a time domain and a frequency domain. The embodiment of the present application mainly describes a method for repeatedly transmitting one TB to a base station by a UE, and when the UE needs to repeatedly transmit a plurality of TBs to the base station, the method provided by the embodiment of the present application may be used for each TB.
S101, UE according to KTA time unit, and the KTEach time unit of Kt，FAnd repeatedly transmitting the TB to the base station by the frequency domain resources. Wherein, KTIs a positive integer, the KTA time unit is used to repeatedly transmit the TB. The K isTIncluding K in the tth time unit of a time unitt，FA frequency domain resource, t is a value ranging from 1 to KTPositive integer of (1), Kt，FIs a positive integer, the Kt，FOne of the frequency domain resources is used to repeatedly transmit the TB once.
UE according to KTA time unit, and the KTEach time unit of Kt，FEach frequency domain resource, when repeatedly transmitting a TB to the base station, for example: for KTK in one time unitT,SA time unit at which the UE isT,SEach time unit of Kt，FAnd repeatedly transmitting the TB to the base station by the frequency domain resources. KT,SIs greater than or equal to 1 and less than or equal to KTIs an integer of (1).
Illustratively, the KTK of at least one time unit in a time unitt，FGreater than or equal to 2. In the embodiments of the present application, at least one of the integers may be 1, 2, 3 or more, and the embodiments of the present application are not limited.
In the embodiment of the present application, the positive integer may be 1, 2, 3, or more, and is not limited in the embodiment of the present application. A positive integer can also be described as an integer greater than or equal to 1.
Accordingly, the base station is according to KTA time unit, and the KTEach time unit of Kt，FAnd repeatedly receiving the TB from the UE for one frequency domain resource. Wherein, KTIs a positive integer, the KTA time unit is used for repeatedly receiving the TB. At KTIncluding K in the tth time unit of a time unitt，FA frequency domain resource, t is a value ranging from 1 to KTPositive integer of (1), Kt，FIs a positive integer, the KFOne of the frequency domain resources is used to repeatedly receive the TB once.
Base station according to KTA time unit, and the KTEach time unit of Kt，FFrequency domain resources, when the TB is repeatedly received from the UE, for example: for KTK in one time unitT,SA time unit at which the base stationT,SEach time unit of Kt，FAnd repeatedly receiving the TB from the UE for one frequency domain resource.
For K aboveTEach time unit, K corresponding to different time unitst，FThe values of (a) may be the same or different, and the embodiments of the present application are not limited.
In the method referred to in fig. 1, the UE is according to KTA time unit, and KTEach time unit of Kt，FA frequency domain resource, and the UE may be in the K when repeatedly transmitting TB to the base stationTRepeatedly transmitting the TB in part or all of the time units; for a time unit, the UE may be at K of the time unitt，FSome or all of the frequency domain resources in the frequency domain resources are repeatedly sent to the TB, which is not limited in the embodiment of the present application.
For one TB, in one possible scenario, the UE is in KTEach time unit of Kt，FThe TB is transmitted in each frequency domain resource, and the UE repeatedly transmits the TB to the base station
Figure BDA0002015069360000081
This time TB. At this time, the method provided by the embodiment of the present application mayThe description is as follows:
UE is respectively at KTRepeatedly transmitting TB to a base station in a time unit, wherein KTIs a positive integer. At the KTIn the t time unit of the time units, the UE is respectively at Kt，FRepeatedly transmitting the TB to a base station in one frequency domain resource, wherein Kt，FIs a positive integer, t is a value in the range of 1 to KTIs a positive integer of (1). Accordingly, the base station may be at this KTEach time unit of Kt，FThe TB is received in a frequency domain resource. Base stations are respectively at KTRepeatedly receiving TB from a UE in a time unit, wherein KTIs a positive integer. At the KTIn the t time unit of the time units, the base station is respectively at Kt，FRepeatedly receiving the TB from the UE in one frequency domain resource, wherein Kt，FIs a positive integer, t is a value in the range of 1 to KTIs a positive integer of (1).
In the examples of the present application, for KTEach time unit can be numbered from 1 to KTOr may be 0 to K, respectivelyT-1. Similarly, for K in the t time unitt，FFrequency domain resources, the number of each frequency domain resource can be divided into 1 to Kt，FOr may be 0 to K, respectivelyt，F-1, wherein t is a number ranging from 1 to KTIs a positive integer of (1).
For a TB, in another possible scenario, at KTEach time unit of Kt，FIn a frequency domain resource, the UE can repeatedly transmit the TB in a part of resources, and the number of times that the UE repeatedly transmits the TB to the base station is less than that of the base station
Figure BDA0002015069360000082
Next, the process is carried out. At this time, the method provided by the embodiment of the present application may be described as follows:
the UE repeatedly transmits the TB to the base station in each of the K1 th through K2 th time units, wherein the K1 th through K2 th time units are included in the KTIn a time unit, KTIs a positive integer, wherein k1 is 0 or more and k or less2, K2 is an integer of 0 to KT-an integer of 1. In one time unit of the K2-K1+1 time units, the UE is in Kt，FRepeatedly transmitting the TB to a base station in frequency domain resources, wherein t is an integer which is more than or equal to K1 and less than or equal to K2, and K isFIs a positive integer.
Accordingly, the base station may have K at each of the K2-K1+1 time cellst，FThe TB is received in a frequency domain resource. The base station repeatedly receives TBs from the UEs in k2-k1+1 time units, respectively. In the t time unit of the K2-K1+1 time units, the base station is respectively at Kt，FRepeatedly receiving the TB from the UE in frequency domain resources, wherein t is an integer ranging from K1 to K2, and Kt，FIs a positive integer. Alternatively, the base stations may be respectively at KTRepeatedly receiving TB from a UE in a time unit, wherein KTIs a positive integer. At the KTIn one time unit of each time unit, the base station is respectively at Kt，FRepeatedly receiving the TB from the UE in each frequency domain resource, wherein t is a value ranging from 1 to KTPositive integer of (1), Kt，FIs a positive integer. The base station may send ACK for the TB to the UE, and upon receiving the ACK for the TB, the UE stops repeatedly sending the TB to the base station.
The method may be applied to a scenario where the arrival time of the data to be transmitted of the UE is later than the 0 th time unit. For example, the UE may repeatedly transmit one TB in 5 time units, and when data to be transmitted of the UE arrives, the latest time unit in which the TB may be repeatedly transmitted is the 2 nd time unit of the 5 time units, and then the UE may repeatedly transmit the TB of the data to be transmitted in the 2 nd time unit to the 4 th time unit.
The method may also be applied in scenarios where transmissions are based on HARQ. For example, the UE may repeatedly transmit one TB in 5 time units, the UE repeatedly transmits the TB from the 1 st time unit or from the 0 th time unit to the 3rd time unit, and before the 4 th time unit, the UE receives an ACK for the TB, which indicates that the base station has correctly received the TB, so the UE does not need to repeatedly transmit the TB to the UE in the 4 th time unit.
Optionally in the time domain for repetitionK for repeatedly transmitting TBTThe time units may be consecutive in the time domain, KTAny one of the time units and the KTAnother one or two other time units of the time units are adjacent. The K isTThe time units may also be discrete in the time domain, KTEach time unit comprises at least one time unit, the time unit and the KTThe other time units in the time unit are not adjacent. In the embodiments of the present application, at least one of the two or more may be 1, 2, 3, or more, and the embodiments of the present application are not limited.
In this embodiment, the unit of the time unit may be a common time unit such as a second, a millisecond, or a microsecond, and may also be a common time unit such as a radio frame, a subframe, a slot, a minislot, a mini-slot (mini-slot), or a time domain symbol. Illustratively, a time unit may be one or more time slots. In this embodiment of the present application, a time domain symbol may be simply referred to as a symbol, and the symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbol, or another time domain symbol, which is not limited in this embodiment. A mini-slot, a micro-slot, a slot, or a subframe may include a positive integer number of symbols. For example, a mini-slot or a micro-slot may include 2 or 4 symbols, for example, a slot may include 7 or 14 symbols. A positive integer number of minislots or minislots may be included in one slot or one subframe. A subframe may include a positive integer number of slots, e.g., 1, 2, or 4. A radio frame may include a positive integer number of subframes, e.g., 10.
In the method referred to in fig. 1, K may be preconfiguredTThe position of each time unit, or the base station can configure the K for the UE through signalingTThe location of each time unit. In the embodiment of the present application, K is configuredTThe location of individual time units may also be understood as configuring time domain resources for unlicensed transmissions, exempt fromThe time domain resources for which transmissions are granted may also be referred to as unlicensed time domain resources.
In one possible implementation, the unit of time unit is a time slot, configuration KTAt the position of each time unit, a (time domain) period, a starting time slot index T and the number K of continuous time slots can be configuredTA starting symbol index S, and the number of symbols L used for one transmission. Wherein one cycle includes P time slots, P, KTAnd L is a positive integer, and T and S are integers of 0 or more. In each period, i.e. in every P time slots, starting from the time slot with index T, there is a total of KTOne continuous time slot for KTThe next repeated transmission TB. Wherein, the indexes of the P time slots can be 0 to P-1 respectively. At the KTIn each of the slots, L symbols in total are used for one-time retransmission of the TB starting from a symbol having an index of S. Alternatively, the length of the period may be expressed as P slots, or may be expressed as xpMillisecond, the embodiment of the present application is not limited, wherein, xpReal numbers greater than 0.
According to this method, fig. 2(a) is a diagram illustrating an example of the unlicensed time domain resource. As shown in FIG. 2(a), configuration KTWhen the position of each time unit is determined, it is assumed that a period is configured to include 5 slots, each slot includes 14 symbols, KTWhen T is 0, S is 4, and L is 10, resources for repeatedly transmitting the TB in the time domain are shown by diagonal line padding in fig. 2 (a). As shown in fig. 2(a), resources for repeatedly transmitting TBs are located in slots with indexes of 0 and 1 every 5 slots in the time domain, and symbols with indexes of 4 to 13 are used for repeatedly transmitting TBs once in each of the two slots.
In another possible implementation, the unit of a time unit is a time slot, configuration KTAt the position of each time unit, a (time domain) period, a starting time slot index T and the number K of time slots can be configuredTStep length between adjacent time slotsTThe starting symbol index S, the number of symbols L used for one transmission. Wherein one cycle includes P time slots, P, KTAnd L is a positive integer, StepTT and S are integers of 0 or more. In each cycle, i.e. in every PIn the time slot, starting from the time slot with index T, with StepTOne time slot is step length, and total KTOne time slot can be used for KTThe next repeated transmission TB. Wherein, the indexes of the P time slots can be 0 to P-1 respectively. At the KTIn each of the slots, L symbols in total are used for one-time retransmission of the TB starting from a symbol having an index of S. Alternatively, the length of the period may be expressed as P slots, or may be expressed as xpMillisecond, the embodiment of the present application is not limited, wherein, xpReal numbers greater than 0. In the method, the Step length between adjacent time slots is configured to be StepTCan be equivalent to: configuring the interval between adjacent time slots to be StepT-1。
According to this method, fig. 2(b) is a diagram illustrating an example of the unlicensed time domain resource. As shown in FIG. 2(b), configuration KTWhen the position of each time unit is determined, it is assumed that a period is configured to include 5 slots, each slot includes 14 symbols, KT＝2，T＝0，Step T2, S is 4 and L is 10, resources for repeatedly transmitting TBs in the time domain are shown as diagonal padding in fig. 2 (b). As shown in fig. 2(b), resources for repeatedly transmitting TBs are located in slots with indexes 0 and 2 every 5 slots in the time domain, and symbols with indexes 4 to 13 are used for repeatedly transmitting TBs once in each of the two slots.
Optionally, at K for repeatedly transmitting TBTIn the t time unit of the time units, the UE can be respectively in Kt，FRepeatedly transmitting the TB to a base station in each frequency domain resource, wherein t is a value range from 1 to KTIs a positive integer of (1). For the KTDifferent ones of the time units, Kt，FThe values of (a) may be the same or different, and the embodiments of the present application are not limited. Illustratively, for KTDifferent time units in the time units can be configured with the same Kt，FOr each K may be independently arrangedt，F。
For KTT time unit of time units, K of time unitt，FThe frequency domain resources may be contiguous in the frequency domain, the Kt，FA frequency domain resourceAny one of the frequency domain resources and the Kt，FAnother one or two other frequency domain resources are adjacent in the frequency domain; k in the time unitt，FThe frequency domain resource can also be discrete in the frequency domain, the Kt，FThe frequency domain resources include at least one frequency domain resource, the at least one frequency domain resource and the Kt，FThe other ones of the frequency domain resources are non-adjacent in the frequency domain.
In the embodiment of the present application, the unit of the frequency domain resource may be a subcarrier, a Resource Block (RB), a Resource Block Group (RBG), a subband, or the like. A positive integer number of subcarriers, for example, 12, may be included in one RB. A positive integer number of RBs, e.g., 4, may be included in an RBG. The unit of the sub-band may be RB, RBG, or megahertz (MHz). In this embodiment, an RB may also be referred to as a first frequency domain unit or another name, an RBG may also be referred to as a second frequency domain unit or another name, and a subband may also be referred to as a third frequency domain unit or another name, which is not limited in this embodiment.
In the embodiment of the application, the base station and the UE may perform data transmission through time-frequency resources. The time-frequency resources used for data transmission may be represented as a resource grid. FIG. 3 is an exemplary diagram of a resource grid. In the resource grid, a Resource Element (RE) is a resource unit for data transmission or a resource unit for resource mapping of data to be transmitted. As shown in fig. 3, one RE corresponds to one symbol in the time domain, e.g., an OFDM symbol or DFT-s-OFDM symbol, and one subcarrier in the frequency domain. One RE may be used to map one complex symbol, for example, a complex symbol obtained through modulation or a complex symbol obtained through precoding, which is not limited in this application. In the frequency domain, Resource Blocks (RBs) may be defined in a resource grid, and in the frequency domain, one RB may include a positive integer number of subcarriers, e.g., 12. Further, the definition of RB may also be extended to the time domain, for example, one RB includes a positive integer number of subcarriers in the time domain and a positive integer number of symbols in the time domain, for example, one RB is a time-frequency resource block including 12 subcarriers in the frequency domain and 7 symbols in the time domain. A positive integer number of RBs may be included in the resource grid. Slots (slots) may be defined in the time domain of the resource grid or time-frequency resources, and a slot may include a positive integer number of symbols, e.g., 7, 14, 6, or 12. A positive integer number of slots may be included in one subframe. Illustratively, for a system supporting multiple subcarrier spacings, 1 slot is included in one subframe when the subcarrier spacing is 15 kilohertz (kHz); when the subcarrier spacing is 30kHz, one subframe includes 2 slots; when the subcarrier interval is 60kHz, 4 slots are included in one subframe.
For K for repeatedly transmitting TBTThe t time unit of the time units can be pre-configured with Kt，FThe size and/or position of the frequency domain resource, or the base station may configure the K for the UE through signalingt，FThe size and/or position of the frequency domain resource, wherein t is a value ranging from 1 to KTIs a positive integer of (1). In the embodiment of the present application, K is configuredt，FThe location of each frequency domain resource may also be understood as a frequency domain resource configured for unlicensed transmission, and the frequency domain resource for unlicensed transmission may also be referred to as an unlicensed frequency domain resource. Alternatively, the Kt，FEach frequency domain resource of the frequency domain resources includes a positive integer RB, and the number of RBs included in different frequency domain resources may be the same or different, which is not limited in the embodiments of the present application. For example, for Kt，FAn ith frequency resource in the frequency domain resources, the ith frequency resource comprising
Figure BDA0002015069360000111
RB, i ═ 0,1, …, KF-1。
The base station indicates K for the UEt，FThe size and location of the individual frequency domain resources may use the following method. For KTT-th time unit of time units, Kt，FThe frequency domain resources may be included in a first bandwidth, which is used for uplink data transmission by the UE and the base station. In the embodiment of the present application, the first bandwidth may be a system bandwidth, a transmission bandwidth of the system, or an active bandwidth part (BWP) of the UE. In the embodiment of the present application, the BWP of the UE may be through signaling by the base stationA segment of frequency domain resources configured for the UE from the system bandwidth. Illustratively, the base station may configure 4 BWPs for transmitting PUSCH from the maximum UE in the system bandwidth, and activate one BWP from the configured BWPs, where the BWP may be referred to as an active BWP or an uplink active BWP of the UE. The base station can configure resources of the PUSCH for the UE from the BWP of the UE through dynamic signaling, and the resources are used for the UE to send the PUSCH to the base station. The BWP of the UE may include a positive integer number of RBs or a positive integer number of RBGs.
Optionally, the base station indicates K for the UE from the first bandwidth by means of a bitmap (bitmap)t，FA size and/or a location of each of the frequency domain resources. For Kt，FOne of the frequency domain resources illustratively includes a positive integer number of RBs in the first bandwidth, and the bits in the bitmap and the RBs in the first bandwidth are in a one-to-one correspondence, each bitmap uniquely corresponding to one RB. When the value of one bit in the bitmap is t1, it indicates that the RB corresponding to the bit is included in the frequency domain resource, and when the value of one bit in the bitmap is t2 or is not t1, it indicates that the RB corresponding to the bit is not included in the frequency domain resource. Where t1 and t2 are integers, illustratively t1 is 1 and t2 is 0. In this method, RB may also be replaced with RBG.
Optionally, the base station indicates K for the UE from the first bandwidth by means of a bitmap (bitmap)t，FOne frequency domain resource, wherein one frequency domain resource is one RB in size. Illustratively, the first bandwidth includes a positive integer number of RBs, and the bits in the bitmap and the RBs in the first bandwidth are in a one-to-one correspondence, each bitmap uniquely corresponding to one RB. K in the bit mapt，FOne bit has a value of t1 and the other bits have a value of t2 or not t 1. The K ist，FK corresponding to one bitt，FRB is the Kt，FA frequency domain resource. Where t1 and t2 are integers, illustratively t1 is 1 and t2 is 0. In this method, RB may also be replaced with RBG.
Optionally for Kt，FFor each frequency resource in the frequency domain resources, the base station may indicate a starting RB and the number of consecutive RBs included for the frequency domain resource from the first bandwidth through signaling. In this method, RB may also be replaced with RBG.
In the embodiment of the present application, the RBs include two types, namely Physical Resource Blocks (PRBs) and Virtual Resource Blocks (VRBs), where the size of one PRB or one VRB is equal to the size of one RB, and one VRB corresponds to one PRB. The mapping relationship between the PRB and the VRB may refer to corresponding descriptions in LTE or 5G, and may also refer to other mapping relationships, which is not limited in the embodiment of the present application. When configuring the frequency domain resources, the PRBs in the frequency domain resources may be configured, or the PRBs in the frequency domain resources may be configured by configuring VRBs in the frequency domain resources.
For KTT time unit of time units, for Kt，FAny two different frequency domain resources in the frequency domain resources, such as frequency domain resource a and frequency domain resource B, may not overlap or have no overlapping portion. For example, subcarriers in frequency domain resource B are not included in frequency domain resource a, and subcarriers in frequency domain resource a are not included in frequency domain resource B.
Illustratively, for KTThe t-th time unit of the time units, shown as K in FIG. 4t，FFrequency domain resource diagram equal to 4. As shown in fig. 4(a), each of the 4 frequency domain resources may include the same number of RBs, for example, each frequency domain resource includes 2 RBs; as shown in fig. 4(b), different frequency domain resources of the 4 frequency domain resources may include the same number of RBs, or may include different numbers of RBs, for example, the 1 st to 4 th frequency domain resources include 3, 2, and 3 RBs, respectively.
In FIG. 2 denoted by KTThe explanation is given by way of example 2, in practice, KTThe value of (b) may be other positive integers, such as 1, 3, or 4, etc. For KTT-th time unit of time units, denoted by K in FIG. 4t，FEqual to 4 is illustrated as an example, in practice, Kt，FThe value of (b) may be other positive integers, such as 1, 2, or 3, etc. Illustratively, for a UE farther away from the base station, the transmit power of the UE is limited, and when an unlicensed transmission resource is configured for the UE, K may be configuredT＞1，K t，F1. Exemplarily for distanceThe UE with the closer base station has unlimited transmitting power, and when the UE is configured with the authorization-free transmission resource, K can be configuredT＞1，K t，F1 or KT＞1，Kt，F＞1。
By the method, the time-frequency resource used when the TB is repeatedly transmitted in the time domain and the frequency domain can be obtained, and when K corresponding to different time unitst，FThe UE may repeatedly transmit to the base station when the values are the same
Figure BDA0002015069360000121
This time TB. Illustratively, K for UE to repeatedly transmit TB to base stationTThe arrangement of time units is shown in FIG. 2(a), at KTK for repeatedly transmitting TB in the tth time unit of time unitst，FThe configuration of the frequency domain resources is as shown in fig. 4(a), and the UE may repeatedly transmit TBs to the base station 4 times in each of slot 0 and slot 1 in every 5 slots. The time frequency resource used when the TB is repeatedly transmitted for the 1 st time is the time frequency resource composed of symbols 4 to 13 and RB 2 to 3, the time frequency resource used when the TB is repeatedly transmitted for the 2 nd time is the time frequency resource composed of symbols 4 to 13 and RB 7 to 8, the time frequency resource used when the TB is repeatedly transmitted for the 3rd time is the time frequency resource composed of symbols 4 to 13 and RB 10 to 11, and the time frequency resource used when the TB is repeatedly transmitted for the 4 th time is the time frequency resource composed of symbols 4 to 13 and RB 16 to 17.
For different time units, Kt，FThe locations of the frequency domain resources may be the same or different. FIG. 5 shows KTK in one time unitt，FPossible configurations of frequency domain resources. As shown in FIG. 5(a), K is the time unit fort，FThe locations of the frequency domain resources are the same. E.g. KTIs equal to 2, Kt，FEqual to 2, in each (time domain) period, in each unlicensed transmission time domain resource, 2 unlicensed transmission frequency domain resources are included each, and the locations of the unlicensed transmission frequency domain resources in different unlicensed transmission time domain resources are the same. As shown in FIG. 5(b), K is the time unit fort，FThe locations of the individual frequency domain resources are different. E.g. KTIs equal to 2, Kt，FEqual to 2, in each (time domain) period, in each unlicensed transmission time domain resource, 2 unlicensed transmission frequency domain resources are included each, and the locations of the unlicensed transmission frequency domain resources in different unlicensed transmission time domain resources are different.
For different time units, Kt，FThe frequency hopping can be performed between the positions of the frequency domain resources. For example, for a first time unit and a second time unit, K in the first time unit1，FLocation of individual frequency domain resources
Figure BDA0002015069360000122
Relative to K in the second time unit2，FLocation of individual frequency domain resources
Figure BDA0002015069360000123
Spaced by offset in the frequency domainkA RB, e.g.
Figure BDA0002015069360000124
Wherein the content of the first and second substances,
Figure BDA0002015069360000125
offsetkand NbandIs an integer of 0 or more, NbandMod represents the modulo operation for the number of RBs included in the first bandwidth. For example, as shown in FIG. 5(b), in the time domain period, K in the first unlicensed transmission time domain resourcet，FThe position of the frequency domain resource is opposite to K in the second unlicensed transmission time domain resourcet，FFrequency hopping of the positions of the frequency domain resources by 1 RB. In the method, OffsetkThe value of (a) may be preconfigured, or may be indicated by the base station for the UE through signaling, which is not limited in the embodiment of the present application.
By the method provided by the above fig. 1, in the unlicensed transmission, by introducing the repeated transmission in the time domain and the frequency domain, the collision probability between UEs can be reduced.
Illustratively, when only time-domain repetition transmission is adopted, the resources configured for unlicensed transmission are the same for UE a and UE B, e.g., the patterns of time units configured for unlicensed transmission are all { resource 0, resource 1, resource 2, resource 3}, and the frequency domain has no repetition, e.g., the patterns of frequency-domain resources configured for unlicensed transmission are all { resource 3} in each time unit. In the unlicensed transmission resources of UE a and UE B, each UE has 4 chances to transmit TB repeatedly, and in one transmission, the resource location combinations used by UE a and UE B have 4 × 4 — 16 possibilities, where the resource location combinations that may collide have 4 possibilities, and if the data transmission is considered to be successful only once without collision, the probability of successful transmission in this method is 75%.
Further exemplarily, when time domain repetition and frequency domain repetition transmission are adopted, that is, when the method provided in the embodiment of the present application is adopted, for UE a and UE B, the resources configured for unlicensed transmission are the same, for example, the patterns of the time units configured for unlicensed transmission are all { resource 0, resource 1, resource 2, resource 3}, and in each time unit, the patterns of the frequency domain resources configured for unlicensed transmission are all { resource 3, resource 5, resource 10 }. In the unlicensed transmission resources of UE a and UE B, each UE has 12 opportunities of repeatedly transmitting TB, and in one transmission, the resource location combinations used by UE a and UE B have 12 × 12-144 possibilities, wherein the resource location combinations that may have a collision have 12 possibilities, and if the data transmission is considered to be successful only once without a collision, the probability of successful transmission using this method is 91.6%.
By comparing the two examples, when the method provided by the embodiment of the application is used for the unlicensed transmission, compared with the unlicensed transmission method only using time domain repetition, the collision probability between different UEs in the unlicensed transmission can be reduced, so that the success rate of data transmission can be improved, and the throughput rate of the system can be improved.
In this embodiment, the TB may include information bits to be sent by the UE to the base station, and the TB may be bits or a bit stream transferred to a physical layer of the UE by a MAC layer of the UE. When the UE sends the TB to the base station, the UE may perform a series of physical layer processing on bits in the TB, and send the processed data to the base station. Illustratively, the physical layer processing may include one or more of the following: cyclic Redundancy Check (CRC) is added, code block segmentation, channel coding, rate matching, code block concatenation, modulation, layer mapping, precoding, and resource mapping, etc. For example, in the embodiment of the present application, the UE may refer to corresponding descriptions in 5G standard protocols 38.212 and 38.211 of the third generation partnership project (3 GPP) for TB processing; or may refer to the corresponding descriptions in 3GPP LTE standard protocols 36.212 and 36.211; or refer to other physical layer processes, which are not limited in the embodiments of the present application.
The number of bits in a TB may be referred to as The Size (TBs) of the TB. In the method related to fig. 1, for a TB to be transmitted, the UE may be respectively at KTEach time unit of Kt，FRepeatedly sending the TB to the base station in each frequency domain resource, and when K corresponding to different time unitst，FThe same value, Kt，F＝KFWherein t is a value ranging from 1 to KTThe UE can repeatedly send K to the base stationT×KFThis time TB. Optionally, the TBs of the TB is determined according to the first RB number. The first RB may be a first PRB or a first VRB, and in the embodiment of the present application, the first RB may be collectively referred to as the first RB for simplified description. The first RB number may be determined according to any one of the following first to fifth first RB number determination methods. In this embodiment, the first number of RBs may also be referred to as a first resource or other names, where the first resource includes a positive integer number of RBs or a positive integer number of subcarriers.
First RB (radio bearer) number determination method: for KTFor each time unit in a time unit, for K in the time unitFThe frequency domain resources are the same in size, each frequency domain resource comprises the same number of RBs, and the number of the first RBs is equal to the number of the RBs in each frequency domain resource. The method can also be described as: for the KTAny one of the time units for K in that time unitFA plurality of frequency domain resources, each frequency domain resource including NsubA first RB number is based onNsubIs determined in which NsubIs a positive integer. For example, the first RB number is equal to Nsub。
The method can be applied to various scenes, and is particularly suitable for the scene that the channel of each frequency domain resource is the same. In the process of the authorization-free transmission, when user collision exists, the probability that the data is correctly decoded is very high as long as one-time data transmission has no collision.
Second method for determining number of first RBs: for KTEach time unit in a time unit comprising KFA frequency domain resource, the KFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000141
RB, wherein i is a value ranging from 1 to KFIs an integer of (1). The first RB number is based on the KFAn
Figure BDA0002015069360000142
Is determined from the average of (a). Illustratively, the first RB number is equal to the KFAn
Figure BDA0002015069360000143
Average value of (a).
In the process of unauthorized transmission, when there is a user collision, the probability that the data is decoded correctly is high as long as there is no collision in one data transmission. By the method, in a scene of flexibly configuring frequency domain resources (for example, a terminal can perform authorization-free transmission in different bandwidth resources, and can fully utilize available resources), the TBS is determined based on the average value of the frequency domain resource sizes, and balance can be achieved between high decoding accuracy and high system data transmission rate.
Third method for determining number of first RBs: for KTEach time unit of a time unit, the timeBetween units including KFA frequency domain resource, the KFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000144
RB, wherein i is a value ranging from 1 to KFIs an integer of (1). The first RB number is based on the KFAn
Figure BDA0002015069360000145
Is determined by the minimum value of (1). Illustratively, the first RB number is equal to the KFAn
Figure BDA0002015069360000146
Minimum value of (1).
In the process of unauthorized transmission, when there is a user collision, the probability that the data is decoded correctly is high as long as there is no collision in one data transmission. By the method, the more conservative TBS is determined based on the minimum frequency domain resource, the decoding correct probability can be improved as much as possible, and the transmission delay of data is reduced.
Fourth method for determining number of first RBs: for KTEach time unit in a time unit comprising KFA frequency domain resource, the KFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000147
RB, wherein i is a value ranging from 1 to KFIs an integer of (1). The first RB number is determined according to the RB number included in the reference frequency domain resource, KFThe reference frequency domain resource is included in the frequency domain resources. For example, the K can be configuredFOne of the frequency domain resources is a reference frequency domain resource. The reference frequency domain resource may be pre-configured or indicated by the base station to the UE through signaling. Illustratively, the first number of RBs is equal to the number of RBs included in the reference frequency domain resource.
By the method, the TBS can be flexibly designed according to the channel condition. For example, when the channel condition is good, a larger frequency domain resource is set as a reference frequency domain resource, and when the channel condition is poor, a smaller frequency domain resource is set as a reference frequency domain resource, so that a higher decoding accuracy can be ensured, the transmission delay of data can be reduced, and a higher system transmission rate can be obtained.
Fifth method for determining number of first RBs: the first number of RBs is preconfigured; or the first RB number is indicated for the UE by the base station through signaling; or the first RB number is based on the first reference value NrefDetermining, e.g. that the first RB number equals Nref. Wherein N isrefIs a positive integer, NrefMay be preconfigured or may be indicated by the base station to the UE by signaling. By the method, the design of TBS can be simplified, thereby simplifying the complexity of system design.
In the above various methods for determining the number of first RBs, the size of the TB is determined according to the number of first RBs, and the number of first RBs is determined according to some technical feature, the method may be further described as: the size of the TB is determined according to this technical feature. For example: for a time unit, K of the time unitFEach of the frequency domain resources includes NsubRB, size of repeatedly transmitted TB is according to NsubIs determined in which NsubIs a positive integer; or, for a time unit, K of the time unitFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000148
RB, wherein i is a value ranging from 0 to KF-an integer of 1, the size of the repeatedly transmitted TB being according to KFAn
Figure BDA0002015069360000149
Is determined; or, for a time unit, K of the time unitFThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA00020150693600001410
RB, wherein i is a value ranging from 0 to KF-an integer of 1, isThe size of the repeatedly transmitted TB is according to the KFAn
Figure BDA00020150693600001411
Is determined from the average of; or, for each time unit, K of the time unitFThe size of the repeatedly transmitted TB in the frequency domain resource is determined according to the number of RBs included in the reference frequency domain resource
Figure BDA0002015069360000151
The method comprises the steps of determining, wherein,
Figure BDA0002015069360000152
is a positive integer, the KFThe frequency domain resources comprise the reference frequency domain resource; or, for each time unit, K of the time unitFThe size of the repeatedly transmitted TB in the frequency domain resources is according to a first reference value NrefIs determined in which NrefIs a positive integer.
In another case, for a TB to be transmitted, the UE may be respectively at KTEach time unit of Kt，FRepeatedly sending the TB to the base station in each frequency domain resource, and when K corresponding to different time unitst，FWhen the values may be different, where t is a value ranging from 1 to KTThe UE can repeatedly transmit to the base station
Figure BDA0002015069360000153
This time TB. Optionally, the TBs of the TB is determined according to the first RB number. The first RB number may be determined according to any one of the following first to fourth first RB number determination methods.
First RB (radio bearer) number determination method: for KTThe t time unit in the time units comprises Kt，FA frequency domain resource, the Kt，FThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000154
RB, wherein i is a value ranging from 1 to Kt，FIs an integer of (1). The first RB number is based on the KTIn a time unit
Figure BDA0002015069360000155
An
Figure BDA0002015069360000156
Is determined from the average of (a). Illustratively, the first RB number is equal to
Figure BDA0002015069360000157
An
Figure BDA0002015069360000158
Average value of (a).
Second method for determining number of first RBs: for KTThe t time unit in the time units comprises Kt，FA frequency domain resource, the Kt，FThe ith frequency domain resource of the frequency domain resources comprises
Figure BDA0002015069360000159
RB, wherein i is a value ranging from 1 to Kt，FIs an integer of (1). The first RB number is based on the KTIn a time unit
Figure BDA00020150693600001510
An
Figure BDA00020150693600001511
Is determined. Illustratively, the first RB number is equal to
Figure BDA00020150693600001512
An
Figure BDA00020150693600001513
Is measured.
Third method for determining number of first RBs: for KTThe t time unit in the time units comprises Kt，FIndividual frequency domain resource, the Kt，FThe ith frequency domain resource of the individual frequency domain resources comprises
Figure BDA00020150693600001514
RB, wherein i is a value ranging from 1 to Kt，FIs an integer of (1). The first RB number is determined according to the RB number included in the reference frequency domain resource, KTA unit of time
Figure BDA00020150693600001515
The reference frequency domain resource is included in the frequency domain resources. For example, can configure the
Figure BDA00020150693600001516
One of the frequency domain resources is a reference frequency domain resource. The reference frequency domain resource may be pre-configured or indicated by the base station to the UE through signaling. Illustratively, the first number of RBs is equal to the number of RBs included in the reference frequency domain resource.
Fourth method for determining number of first RBs: the first number of RBs is preconfigured; or the first RB number is indicated for the UE by the base station through signaling; or the first RB number is based on the first reference value NrefDetermining, e.g. that the first RB number equals Nref. Wherein N isrefIs a positive integer, NrefMay be preconfigured or may be indicated by the base station to the UE by signaling. By the method, the design of TBS can be simplified, thereby simplifying the complexity of system design.
When determining the TBs of the TB that is repeatedly transmitted according to the first number of RBs, the TBs may be determined by any one of the following first TBs determination method and second TBs determination method, or may be determined by another method, which is not limited in the embodiments of the present application.
First TBS determination method：
The base station sends Modulation and Coding Scheme (MCS) index I to the UEMCSWherein, IMCSAre integers. I isMCSFor indicating modulation scheme, or for indicating modulationMechanism and coding rate. I isMCSIt can also be used to indicate the Redundancy Version (RV) when HARQ is performed.
Receive IMCSThereafter, the UE may be according to IMCSDetermining TBS index ITBSAnd can be according to ITBSAnd the first number of RBs determines the TBS of the repeatedly transmitted TB. UE is according to IMCSDetermining TBS index ITBSCan be according to IMCSAnd ITBSThe mapping relationship between the two is determined. Exemplarily, IMCSAnd ITBSThe mapping relationship between the two can be shown in table 1, and the mapping relationship can also include IMCSAnd modulation order, and IMCSAnd the mapping relationship between the RV. UE is according to ITBSWhen determining TBS according to the first RB number, the TBS can be determined according to ITBSAnd determining the mapping relation between the first RB number and the TBS. Exemplarily, ITBSAnd the mapping relationship between the first RB number and the TBS are shown in table 2. I isMCSAnd ITBSA mapping relationship between, or ITBSThe mapping relationship between the first RB number and the TBS may be preconfigured, or the base station may configure the UE through signaling, which is not limited in the embodiment of the present application.
TABLE 1
Figure BDA0002015069360000161
TABLE 2 TBS
Figure BDA0002015069360000162
Figure BDA0002015069360000171
Second TBS determination method：
The UE transmits the TB to the base station through a PUSCH, which may be mapped in one or more time-frequency resource blocks. Wherein, one time-frequency resource block frequency domain comprises one RB, and the time domain comprises one time slot. In an exemplary manner, the first and second electrodes are,for one time-frequency resource block in the one or more time-frequency resource blocks, the time-frequency resource block comprises 12 × 14-156 REs, and the number N of REs used for sending PUSCH in the time-frequency resource block is determinedREWherein N isREAre integers. For example, in the time-frequency resource block, the number of REs used for transmitting PUSCH is equal to the total number of REs 156 in the time-frequency resource block minus the number of REs used for transmitting other channels or signals in the time-frequency resource block, where the other signals or signals may be one of the following signals or channels: a demodulation parameter signal (DMRS), a Phase Tracking Reference Signal (PTRS), a broadcast channel, a synchronization signal, a PUCCH, and the like. According to NREAnd the first RB number Nfirst_RBN can be determinedRE′＝min(156,NRE)×Nfirst_RB。
The base station sends index I of MCS for UEMCSAs shown in Table 3, IMCSModulation order Q for indicating modulation mechanism of PUSCHmTarget code rate RPUSCHAnd may also be used to indicate spectral efficiency. The base station may also indicate the number of transmission layers v of the PUSCH for the UEPUSCH. Wherein R isPUSCHIs a real number; v. ofPUSCHIs a positive integer, such as 1, 2 or 3; qmIs a positive integer. In Table 3, q has a value of 1 or 2.
TABLE 3
Figure BDA0002015069360000191
The UE may calculate a first intermediate variable Ninfo＝NRE′×RPUSCH×Qm×vPUSCHAccording to a first intermediate variable NinfoThe size of the TB may be determined. According to a first intermediate variable NinfoThe method for determining the size of the TB may refer to corresponding descriptions in 3GPP 5G protocol 36.214, or may refer to other methods, which is not limited in the embodiments of the present application. E.g. Ninfo3824 or less, according to NinfoDetermining a second intermediate variable
Figure BDA0002015069360000192
Wherein
Figure BDA0002015069360000193
The UE may select from Table 4 not less than the second intermediate variable NinfoThe minimum value of' is taken as the size of TB. Wherein not less than includes greater than or equal to.
TABLE 4 TBS, Ninfo≤3824
Figure BDA0002015069360000201
By the above method, for a repeatedly transmitted TB, the TBs of the TB can be obtained, so that the UE can determine the TB according to the information bits to be transmitted and repeatedly transmit the TB in the time domain and the frequency domain.
In the method related to fig. 1, for one TB, the UE may repeatedly transmit the TB to the base station in time and frequency domains. Each time the TB is repeatedly transmitted, the UE may perform channel coding and rate matching on the TB, and transmit data obtained after the rate matching to the base station. Accordingly, when the base station receives the TB, it may perform operations such as de-channel coding, de-rate matching, and the like. When the UE performs rate matching, the UE may perform rate matching according to the RV. When the UE performs channel coding on the TB, it may perform bit-level processing on the TB, and perform channel coding on the data obtained after the bit-level processing. Illustratively, the bit-level processing may include one or more of the following: CRC is added, code block segmentation. When the UE sends the data obtained after rate matching to the base station, the UE may perform physical layer processing on the data obtained after rate matching, and send the processed data to the base station. Illustratively, the physical layer processing may include one or more of the following: code block concatenation, modulation, layer mapping, precoding, resource mapping, etc.
In the embodiment of the present application, when performing channel coding on an input bit stream (for example, bits included in a TB or bits obtained by performing bit level processing on the TB), the input bit stream may be channel coded based on a code rate according to a channel coding method, for example, a channel coding method such as a convolutional code, a turbo (turbo) code, a Low Density Parity Check (LDPC) code, or a polar (polar) code, to obtain a coded bit stream. The input bit stream may include a positive integer number of input bits, and the encoded bit stream may include a positive integer number of encoded bits. When performing channel coding, the code rate is a real number, and may be 1/2, 1/3, 1/5, or the like, for example. The code rate can be understood as the ratio of the number of bits in the input bit stream to the number of bits in the encoded bit stream. When the channel coding is carried out, redundant information is introduced to resist channel interference, so that the reliability of data transmission is increased. In the embodiment of the present application, the input bitstream may also be simply referred to as input bits, and the coded bitstream may also be simply referred to as coded bits.
As shown in fig. 6, which is an exemplary diagram of channel coding, the coded bit stream obtained after channel coding includes information bits and check bits. Illustratively, when channel coding is performed, the code rate is 1/3, and the input bit stream BucIncluding D bit, D is positive integer, BucCan be expressed as
Figure BDA0002015069360000211
Figure BDA0002015069360000212
Is BucI is an integer with a value ranging from 0 to D-1. To BucCoded bit B obtained after channel codingcCan be expressed as
Figure BDA0002015069360000213
BcComprises 3D bits, wherein
Figure BDA0002015069360000214
The total D bits are the information bits,
Figure BDA0002015069360000215
the 2D bits are the check bits.
When rate matching is performed on the coded bits, rate matching can be performed according to the RV and the target code rate. The target code rate represents the ratio of the number of bits in the input bit stream to the number of bits in the output bit stream obtained after rate matching when channel coding is performed. For example, when performing rate matching, as shown in fig. 7, the coding ratios may be sequentially placed in a circular buffer (circular buffer) end to end, and the number of bits corresponding to the target code rate is read from the circular buffer according to the starting position indicated by the RV, so as to obtain the output bitstream after rate matching. Fig. 7(a) shows a one-dimensional circular buffer, which can be sequentially read during rate matching; fig. 7(b) shows a two-dimensional circular buffer, which can be read sequentially in the order of first column and second row when performing rate matching, for example, reading the 1 st column first and then reading the 2 nd column second. In rate matching, a positive integer number of RVs may be included, e.g., 4 RVs for RV0, RV1, RV2, and RV3, evenly distributed in the circular buffer. As shown in the ring buffer and RV of fig. 7, when the bit streams are read from RV0 to RV3, the number of information bits included in the output bit stream decreases sequentially, and the number of check bits included increases sequentially, which may correspond to different decoding performance and decoding complexity. When performing transmission based on the HARQ scheme, for example, when the UE transmits data to the base station based on the HARQ scheme, one kind of RV may be used when performing one data transmission. For example, for a TB, the UE uses RV0 when transmitting the TB to the base station for the first time, and based on transmission needs, the UE may also transmit the TB to the base station 2 nd, 3rd or even 4 th time using RV1, RV2 and RV3, respectively. The base station may perform joint decoding, such as Incremental Redundancy (IR) joint decoding, on the multiple received TBs. RV0 contains many information bits, and RV1, RV2 and RV3 contain many parity bits. For multiple repeated transmissions of one TB, one transmission uses RV0, so that enough information bits can be guaranteed to be received for decoding, and other transmissions use RV1, RV2 or RV3, so that more check bits can be contained, and the receiving end is guaranteed to better resist noise and other non-ideal factors.
In the method referred to in FIG. 1, for KTThe t time unit of the time units, K of the UE in the time unitt，FIn one frequency domain resourceCan repeatedly send K to the base stationt，FSub TB. Each time the TB is repeatedly transmitted, the UE may perform channel coding on the TB, perform rate matching according to the corresponding RV, and transmit data obtained after the rate matching to the base station.
Optionally, K is included in the t-th time unitt，FFrequency domain resource at kth time unitfThe RV used when transmitting the TB on a frequency domain resource is the first RV in the RV sequence
Figure BDA0002015069360000216
RV, wherein when t is 2 to KTWhen the number of (a) is an integer,
Figure BDA0002015069360000217
when t is 1, a1 ═ kfI.e. K0，FEqual to 0. Wherein mod represents a modulo operation, and RV sequence comprises
Figure BDA0002015069360000218
The number of the RV is one,
Figure BDA0002015069360000219
is a positive integer, t is a value in the range of 1 to KTInteger of (a), kfIs a value ranging from 1 to Kt，FIs an integer of (1).
Figure BDA00020150693600002110
The values of different RVs in each RV may be the same or different, and the embodiment of the present application is not limited. The value of any one of RV may be RV0, RV1, RV2 or RV 3. The
Figure BDA00020150693600002111
The number of each RV may be from 1 to
Figure BDA00020150693600002112
The main sources of interference faced in one TB transmission are collisions and noise from other UEs. Since the information bits contained in RV0 are important, the UE can start unlicensed transmission in a time unit using RV0, and in order to combat interference, multiple repetitions should contain more RV 0. To combat noise, more TBs with RV1, RV2, or RV3 may be included in the multiple repetitions in addition to the TB with RV 0. Therefore, the multiple transmissions of one TB should have different configurations for the RVs for different transmission scenarios.
Illustratively, 4 RVs are included in the RV sequence, each of the 4 RVs is RV0, and the RV sequence can be expressed as { RV0, RV0, RV0, RV0 }. Fig. 8(a) shows an exemplary diagram of repeated transmission using the RV sequence. As shown in fig. 8(a), in one time period, a total of 4 slots are used for repeatedly transmitting a TB, and in each of the 4 slots, a total of 2 RBs are used for repeatedly transmitting the TB, each of the 2 RBs being used for repeatedly transmitting the TB once, and RV0 is used each time the TB is repeatedly transmitted.
Because the number of information bits included in RV0 is large, the RV sequence can be applied to various application scenarios, especially to scenarios with high UE arrival rate. In a scenario with a high UE arrival rate, user collision is a main interference source, and when RV0 is used in each frequency resource of each time unit, the decoding accuracy can be improved.
Illustratively, 4 RVs are included in the RV sequence, and the RV sequence is { RV0, RV2, RV3, RV1 }. Fig. 8(b) is an exemplary diagram illustrating repeated transmission using the RV sequence. As shown in fig. 8(b), in one time period, a total of 4 slots are used for repeatedly transmitting the TB, and in each of the 4 slots, a total of 2 RBs are used for repeatedly transmitting the TB, and each of the 2 RBs is used for repeatedly transmitting the TB once. In the 4 slots, when two RBs in the first slot are used for repeatedly transmitting the TB, RV0 and RV2 are respectively used, when two RBs in the second slot are used for repeatedly transmitting the TB, RV3 and RV1 are respectively used, when two RBs in the third slot are used for repeatedly transmitting the TB, RV0 and RV2 are respectively used, and when two RBs in the fourth slot are used for repeatedly transmitting the TB, RV3 and RV1 are respectively used.
The RV sequence can be suitable for various application scenes, and is particularly suitable for transmission scenes in which noise is a main interference source. In a transmission scene where noise is a main interference source, RV is independently configured for different frequency resources, so that the influence of the noise on data transmission can be reduced, and the decoding accuracy can be improved.
Illustratively, 4 RVs are included in the RV sequence, and the RV sequence is { RV0, RV3, RV0, RV3 }. Fig. 8(c) is an exemplary diagram illustrating repeated transmission using the RV sequence. As shown in fig. 8(c), in one time period, a total of 4 slots are used for repeatedly transmitting the TB, and in each of the 4 slots, a total of 2 RBs are used for repeatedly transmitting the TB, and each of the 2 RBs is used for repeatedly transmitting the TB once. In the 4 slots, when two RBs in any one slot repeatedly transmit the TB, RV0 and RV3 are used, respectively.
The RV sequence can be suitable for various application scenarios. In a scenario where noise is a main interference source and the UE arrival rate is low, the RV0 is considered to be increased, and the RV is considered to be configured independently for different frequency resources, so that more information bits included in RV0 can be utilized, and the influence of noise on data transmission can be reduced, thereby improving the decoding accuracy.
Alternatively to KTThe t time unit of the time units, K of the UE in the time unitt，FThe same RV may be used when the TBs are repeatedly transmitted in the frequency domain resources. The RV may be preconfigured, or may be sent by the base station to the UE through signaling, which is not limited in the embodiment of the present application. The RVs used in different time units may be the same or different, and the embodiment of the present application is not limited. For example, for KTT-th time unit of time units, K in the time unitt，FThe RV used when repeatedly transmitting TB in a frequency domain resource is the first RV in the RV sequence
Figure BDA0002015069360000221
And (4) one RV. Wherein mod represents a modulo operation, and RV sequence comprises
Figure BDA0002015069360000222
The number of the RV is one,
Figure BDA0002015069360000223
is a positive integer, t is a value in the range of 1 to KTIs an integer of (1).
Figure BDA0002015069360000224
The values of different RVs in each RV may be the same or different, and the embodiment of the present application is not limited. The value of any one of RV may be RV0, RV1, RV2 or RV 3. The
Figure BDA0002015069360000225
The number of each RV may be from 1 to
Figure BDA0002015069360000226
Illustratively, 4 RVs are included in the RV sequence, each of the 4 RVs is RV0, and the RV sequence can be expressed as { RV0, RV0, RV0, RV0 }. Fig. 8(d) shows an exemplary diagram of repeated transmission using the RV sequence. As shown in fig. 8(d), in one time period, a total of 4 slots are used for repeatedly transmitting the TB, and in each of the 4 slots, a total of 2 RBs are used for repeatedly transmitting the TB, each of the 2 RBs being used for repeatedly transmitting the TB once, and RV0 is used each time the TB is repeatedly transmitted.
Illustratively, 4 RVs are included in the RV sequence, and the RV sequence is { RV0, RV2, RV3, RV1 }. Fig. 8(e) is an exemplary diagram illustrating repeated transmission using the RV sequence. As shown in fig. 8(e), in one time period, a total of 4 slots are used for repeatedly transmitting the TB, and in each of the 4 slots, a total of 2 RBs are used for repeatedly transmitting the TB, and each of the 2 RBs is used for repeatedly transmitting the TB once. In the 4 slots, RV0 is used when two RBs in the first slot repeatedly transmit TBs, RV2 is used when two RBs in the second slot repeatedly transmit TBs, RV3 is used when two RBs in the third slot repeatedly transmit TBs, and RV1 is used when two RBs in the fourth slot repeatedly transmit TBs.
The RV sequence can be suitable for various application scenes, and is particularly suitable for transmission scenes in which noise is a main interference source. In a transmission scene with noise as a main interference source, RV is independently configured for different time units, so that the influence of the noise on data transmission can be reduced, and the decoding accuracy can be improved.
Illustratively, 4 RVs are included in the RV sequence, and the RV sequence is { RV0, RV3, RV0, RV3 }. Fig. 8(f) is an exemplary diagram illustrating repeated transmission using the RV sequence. As shown in fig. 8(f), in one time period, a total of 4 slots are used for repeatedly transmitting the TB, and in each of the 4 slots, a total of 2 RBs are used for repeatedly transmitting the TB, and each of the 2 RBs is used for repeatedly transmitting the TB once. Among the 4 slots, RV0 is used when the TB is repeatedly transmitted by two RBs in the first slot and the third time, and RV3 is used when the TB is repeatedly transmitted by two RBs in the second slot and the fourth slot.
The RV sequence can be suitable for various application scenarios. In a scenario where noise is a main interference source and the UE arrival rate is low, the utilization rate of RV0 is considered to be increased, and RV is considered to be configured independently for different time units, so that more information bits included in RV0 can be utilized, and the influence of noise on data transmission can be reduced, thereby improving the decoding accuracy.
In the embodiment of the present application, when the UE transmits data to the base station, in addition to transmitting (information) data to the base station through a data channel, the UE may also transmit a demodulation reference signal (DMRS) to the base station. The sequence value of the DMRS may be information known to the UE and the base station. After receiving the DMRS, the base station may perform channel estimation according to the received DMRS, and decode a data channel according to a result of the channel estimation, thereby obtaining data sent by the UE for the base station. The DMRS may be used to carry UE Identity (ID) information, and after receiving the DMRS, the base station may determine a UE to which the DMRS and data are transmitted.
In the method related to fig. 1, the UE may transmit the TB through a Physical Uplink Shared Channel (PUSCH). The UE may also send the DMRS for the PUSCH to the base station for the base station to decode the PUSCH. For the t time unit, the UE may be at K of the time unitt，FIn one frequency domain resource, by Kt，FThe TBs are repeatedly transmitted on every PUSCH. The UE may also send the K to the base stationt，FK of PUSCHt，FDMRS, the Kt，FDMRS and the Kt，FOne for one PUSCH for decoding the Kt，FAnd a PUSCH. The K ist，FKth in DMRSfSequence values of DMRS are according to Kt，FK-th of scrambling valuefA scrambling value is determined, where kfIs a value ranging from 1 to Kt，FIs an integer of (1). The K ist，FThe scrambling value may be included in a set of scrambling values. The K ist，FThe scrambling value may be preconfigured, or may be configured for the UE by the base station through signaling, which is not limited in the embodiment of the present application.
In this embodiment, the DMRS may be various possible sequences, such as a Gold sequence, a zc (zadoff chu) sequence, a golay sequence, and the like, and this embodiment is not limited in this application. For simplicity of description, in the embodiments of the present application, sequence values of DMRSs are described by taking Gold sequences as examples.
Exemplarily, the scrambling value set of the t time unit can be recorded as
Figure BDA0002015069360000231
Together comprise Kt，FA scrambling value. According to Kt，FA scrambling value, K can be determinedt，FInitialization value of Gold sequence
Figure BDA0002015069360000232
According to Kt，FAn initialization value, K can be determinedt，FA Gold sequence. In this embodiment of the present application, the scrambling value sets of different time units may be the same or different, and this embodiment of the present application is not limited.
In one possible implementation, for the t time unit, for Kt，FK-th of the initialization valuefAn initial value
Figure BDA0002015069360000233
kfIs a value ranging from 1 to Kt，FThe number of the integer (c) of (d),
Figure BDA0002015069360000234
wherein the content of the first and second substances,
Figure BDA0002015069360000235
indicating the number of symbols included in a slot, nsIndicates a slot index where the DMRS is located, l indicates a symbol index where the DMRS is located,
Figure BDA0002015069360000236
k-th representing the t-th time unitfA scrambling value, nscIDThe value is 0 or 1. By the method, when the UE of different cells uses the same time frequency resource for repeated transmission, each DMRS is independently set
Figure BDA0002015069360000237
The interference between the UEs of different cells can be reduced.
In another possible implementation, for the t time unit, for Kt，FK-th of the initialization valuefAn initial value
Figure BDA0002015069360000241
kfIs a value ranging from 1 to Kt，FThe number of the integer (c) of (d),
Figure BDA0002015069360000242
may be according to Kt，FDetermining, for example:
Figure BDA0002015069360000243
wherein d is a positive integer,
Figure BDA0002015069360000244
the value of (d) can be expressed as d bits, d being a positive integer. (2a×Kt，F+ a2) may be represented as (a + b) bits, with the lower a bits used to represent a2 and the upper b bits used to represent Kt，F. Wherein a and b are positive integers, and (a + b) is not less than c. Wherein A2 may include other than Kt，FOther than for making
Figure BDA0002015069360000245
The randomized parameter, for example, A2 may beAnd the DMRS is determined according to the symbol index where the DMRS is located and/or the slot index where the DMRS is located.
In an exemplary manner, the first and second electrodes are,
Figure BDA0002015069360000246
wherein the content of the first and second substances,
Figure BDA0002015069360000247
indicating the number of symbols included in a slot, nsIndicates a slot index where the DMRS is located, l indicates a symbol index where the DMRS is located,
Figure BDA0002015069360000248
k-th representing the t-th time unitfA scrambling value, nscIDThe value is 0 or 1. By the method, the interference between data transmission with different repetition times can be reduced, and the data transmission rate of the system can be improved.
For 1 DMRS, a Gold sequence may consist of 2 m sequences (x)1,x2) Modulo-2 addition, i.e. c (n) ═ (x)1(n+Nc)+x2(n+Nc) Mod2 where c (N) denotes the nth element in the Gold sequence c, NcAnd N is an integer, e.g. Nc1600, c includes LDMRSAnd (4) each element. L isDMRSIndicates the number of subcarriers or REs included in the frequency domain resources that can be allocated by the base station on one symbol. The frequency domain resource that can be allocated by the base station may be a frequency domain resource in a system bandwidth of a cell in which the UE is located, a frequency resource in a transmission bandwidth of a cell in which the UE is located, or a frequency domain resource in an active BWP of the UE, which is not limited in this embodiment of the present application.
First m-sequence x1May be represented by x1The 0 th to 31 th elements are initialized, for example: x is the number of1(n+31)＝(x1(n+3)+x1(n)) mod2 where x1(0)＝1，x1(1) To x1(30) Are all equal to 0, x1(n) represents x1The nth element of (A), x1(n +3) represents x1Middle (n +3) th element, x1(n +31) represents x1The (n +31) th element, n is an integer.
Second m-sequence x2May be a sequence of values
Figure BDA0002015069360000249
To initialize, for example: x is the number of2(n+31)＝(x2(n+3)+x2(n+2)+x2(n+1)+x2(n)) mod2 where x2When the 0 th element to the 30 th element are respectively equal to binary
Figure BDA00020150693600002410
Of the 0 th bit to the 30 th bit, x2(n +3) represents x2Middle (n +3) th element, x2(n +2) represents x2N +2 th element, x2(n +1) represents x2Middle (n +1) th element, x2(n) represents x2The nth element x2(n +31) represents x2The (n +31) th element, n is an integer.
Fig. 9 shows an example diagram of retransmission of a TB and transmission of a corresponding DMRS using the method provided by an embodiment of the present application. As illustrated in fig. 9(a), in one time unit, assuming that 7 symbols are included in the time unit, the UE may repeatedly transmit a TB to the base station through 2 PUSCHs in 2 frequency domain resources. The UE may also transmit 2 DMRSs to the base station, where the 2 DMRSs and the 2 PUSCHs are in one-to-one correspondence. Wherein, the symbols used for transmitting the PUSCH are symbols 1 to 6, the symbol used for transmitting the DMRS of the PUSCH is symbol 0, and the subcarriers used for transmitting the PUSCH and the subcarriers used for transmitting the DMRS of the PUSCH are the same. Wherein, the sequence value of the DMRS of the 1 st PUSCH comes from the first Gold sequence c0, the sequence value of c0 comprises Lc0An element, Lc0Is an integer, Lc0Is equal to the number of subcarriers included in the frequency domain resources allocable by the base station, Lc0The elements correspond one-to-one to subcarriers included in frequency domain resources that can be allocated by the base station. And c0, mapping elements corresponding to the subcarriers where the DMRS are located to time-frequency resources, and transmitting the time-domain signals serving as the DMRS after IFFT. Similarly, the sequence value of the DMRS for PUSCH 1 comes from the first Gold sequence c1。
In practice, the symbol for transmitting the PUSCH, and/or the symbol for transmitting the DMRS for transmitting the PUSCH, and/or the subcarrier for transmitting the DMRS for transmitting the PUSCH may also have a configuration different from that in fig. 9(a), as in fig. 9(b), and the embodiment of the present application is not limited.
The above embodiments describe a method of repeatedly transmitting one TB for the TB. In the process of data transmission between the UE and the base station, the UE may send multiple TBs to the base station, and for some or all of the multiple TBs, the UE may perform uplink data transmission by using the method and the base station described in the above embodiments.
The method provided by the embodiment of the present application is described above from the perspective of interaction between a base station and a UE. In order to implement the functions in the method provided by the embodiments of the present application, the base station and/or the UE may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.
Fig. 10 is a schematic structural diagram of an apparatus 1000 according to an embodiment of the present application. The apparatus 1000 may be a UE or a base station, and may implement the method provided in the embodiment of the present application; the apparatus 1000 may also be an apparatus capable of supporting a UE or a base station to implement the method provided in the embodiments of the present application, and the apparatus 1000 may be installed in the base station or the UE. The apparatus 1000 may be a hardware structure, a software module, or a hardware structure plus a software module. The apparatus 1000 may be implemented by a system-on-chip.
The device 1000 includes a processing module 1002 and a communication module 1004. The processing module 1002 may generate information for transmission and may transmit the information using the communication module 1004. The processing module 1002 may receive information using the communication module 1004 and process the received information. The processing module 1002 and the communication module 1004 are coupled.
The coupling in the embodiments of the present application is an indirect coupling or connection between devices, units or modules, which may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. The coupling may be a wired connection or a wireless connection.
In this embodiment, the communication module may be a circuit, a module, a bus, an interface, a transceiver, or other devices that can implement a transceiving function, and this embodiment is not limited in this application.
Fig. 11 is a schematic structural diagram of an apparatus 1100 according to an embodiment of the present disclosure. The apparatus 1100 may be a terminal device or a base station, and is capable of implementing the method provided in the embodiment of the present application; the apparatus 1100 may also be an apparatus, such as a chip system, capable of supporting a terminal device or a base station to implement the method provided by the embodiment of the present application, and the apparatus 1100 may be installed in the base station or the terminal device.
As shown in fig. 11, a processing system 1102 is included in an apparatus 1100 for implementing or supporting a terminal device or a base station to implement the method provided by the embodiment of the present application. The processing system 1102 may be a circuit, which may be implemented by a system-on-chip. One or more processors 1122 are included in the processing system 1102 and may be used to implement or support a terminal device or a base station to implement the methods provided by the embodiments of the present application. When included in processing system 1102, processor 1122 can also be used to manage other devices included in processing system 1102, such as one or more of memory 1124, bus 1126, and bus interface 1128 described below. For example, processor 1122 may be used to manage memory 1124, or processor 1122 may be used to manage memory 1124, bus 1126, and bus interface 1128.
One or more memories 1124 may also be included in the processing system 1102 for storing instructions and/or data. Memory 1124 may be included in processor 1122. If the processing system 1102 includes the memory 1124, the processor 1122 may be coupled to the memory 1124. The processor 1122 may operate in conjunction with the memory 1124. Processor 1122 may execute instructions stored in memory 1124. The processor 1122, when executing instructions stored in the memory 1124, may implement or support a UE or a base station to implement the methods provided by the embodiments of the present application. The processor 1122 may also read data stored in the memory 1124. Memory 1124 may also store data that is derived by processor 1122 when executing instructions.
In the embodiment of the present application, the memory includes a volatile memory (volatile memory), such as a random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile) such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory may also comprise a combination of memories of the above kind; the memory may also include any other means having a memory function such as a circuit, device, or software module.
The processing system 1102 may also include a bus interface 1128 for providing an interface between the bus 1126 and other devices. The bus interface may also be referred to as a communication interface, among others. In this embodiment of the present application, the communication interface may be a circuit, a module, a bus, an interface, a transceiver, or other devices that can implement a transceiving function, and this embodiment of the present application is not limited.
The apparatus 1100 may also include a transceiver 1106 for communicating with other communication devices over a transmission medium such that other apparatus used in the apparatus 1100 may communicate with other communication devices. Which may be the processing system 1102. Illustratively, other ones of the apparatus 1100 may communicate, receive and/or transmit corresponding information using the transceiver 1106 and other communication devices. It can also be described that other devices in the apparatus 1100 may receive corresponding information, where the corresponding information is received by the transceiver 1106 over a transmission medium, where the corresponding information may interact between the transceiver 1106 and other devices in the apparatus 1100 through the bus interface 1128 or through the bus interface 1128 and bus 1126; and/or other devices in device 1100 may transmit corresponding information, where the corresponding information is transmitted by transceiver 1106 over a transmission medium, where the corresponding information may interact between transceiver 1106 and other devices in device 1100 through bus interface 1128 or through bus interface 1128 and bus 1126.
The device 1100 may also include a user interface 1104, where the user interface 1104 is an interface between a user and the device 1100, possibly for the user to interact with the device 1100 for information. Illustratively, the user interface 1104 may be at least one of a keyboard, a mouse, a display, a speaker (microphone), and a joystick.
The above description has described a device structure provided by an embodiment of the present application, primarily from the perspective of device 1100. In the apparatus, the processing system 1102 includes a processor 1122 and may further include one or more of a memory 1124, a bus 1126, and a bus interface 1128 for implementing the methods provided by the embodiments of the present application. The processing system 1102 is also within the scope of the present application.
In the embodiment of the device of the present application, the module division of the device is a logic function division, and there may be another division manner in actual implementation. For example, each functional module of the apparatus may be integrated into one module, each functional module may exist alone, or two or more functional modules may be integrated into one module.
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 invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal, or other programmable apparatus. 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 incorporates one or more of the 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., SSD), among others.
In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.
The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the protection scope thereof. All modifications, equivalents, improvements and the like based on the technical solutions of the present application should be included in the protection scope of the present application.

Claims (10)

1. A method of data transmission, comprising:
for KTK in one time unitT，SA time unit in the KT，SEach time unit of Kt，FA frequency domain resource, repeatedly transmitting a transport block TB; wherein the content of the first and second substances,
KTis a positive integer, KT，SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly transmitting the TB once, and t is a value range from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2.
2. The method of claim 1, wherein the method is performed in a batch modeCharacterized in that K isTK for each of the time unitst，FIs equal to KF：
Said KFEach of the frequency domain resources includes NsubA number of RBs, the size of the TB being according to the NsubIs determined in which NsubIs a positive integer;
said KFThe ith frequency domain resource of the frequency domain resources comprises
Figure FDA0002015069350000011
RB, wherein i is a value ranging from 1 to KFThe size of the TB is according to the KFAn
Figure FDA0002015069350000012
Is determined from the average of;
said KFThe ith frequency domain resource of the frequency domain resources comprises
Figure FDA0002015069350000013
RB, wherein i is a value ranging from 1 to KFThe size of the TB is according to the KFAn
Figure FDA0002015069350000014
Is determined;
the size of the TB is determined according to the number of RBs included in the reference frequency domain resource
Figure FDA0002015069350000015
The method comprises the steps of determining, wherein,
Figure FDA0002015069350000016
is a positive integer, said KFThe frequency domain resources comprise the reference frequency domain resource; or
The size of the TB is according to a first reference value NrefIs determined in which NrefIs a positive integer.
3. The method according to claim 1 or 2,
when the TB is sent, carrying out channel coding on the TB and carrying out rate matching according to a Redundancy Version (RV);
at kth time unitfWhen the TB is transmitted on a frequency domain resource, the first time in the RV sequence is used
Figure FDA00020150693500000111
Figure FDA0002015069350000018
Rate matching is carried out on the RVs, wherein the RV sequences comprise
Figure FDA0002015069350000019
The number of the RV is one,
Figure FDA00020150693500000110
is a positive integer, kfIs a value ranging from 1 to Kt，FInteger of (a), K0，FEqual to 0.
4. The method according to any one of claims 1 to 3,
the K at the t time unitt，FWhen the TB is repeatedly transmitted in a frequency domain resource, the K ist，FBy K in one frequency domain resourcet，FRepeatedly transmitting the TB by a plurality of PUSCHs;
the method further comprises the following steps: sending the Kt，FK of PUSCHt，FA demodulation reference signal (DMRS);
wherein, K ist，FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt，FThe set of scrambling values includes Kt，FA scrambling value.
5. A method of data transmission, comprising:
for KTK in one time unitT，SA time unit in the KT，SEach time unit of Kt，FA frequency domain resource repeatedly receiving a transport block, TB; wherein the content of the first and second substances,
KTis a positive integer, KT，SIs greater than or equal to 1 and less than or equal to KTIs an integer of (A), said KTIncluding K in the t-th time unit of the time unitst，FA frequency domain resource, the Kt，FOne of the frequency domain resources is used for repeatedly receiving the TB once, and t is a value ranging from 1 to KTA positive integer of (A), said KTK of at least one time unit in time unitst，FGreater than or equal to 2.
6. The method of claim 5, wherein for the KTK for each of the time unitst，FIs equal to KF：
Said KFEach of the frequency domain resources includes NsubA number of RBs, the size of the TB being according to the NsubIs determined in which NsubIs a positive integer;
said KFThe ith frequency domain resource of the frequency domain resources comprises
Figure FDA0002015069350000021
RB, wherein i is a value ranging from 1 to KFThe size of the TB is according to the KFAn
Figure FDA0002015069350000022
Is determined from the average of;
said KFThe ith frequency domain resource of the frequency domain resources comprises
Figure FDA0002015069350000023
A plurality of RB (resource blocks),wherein i is a value ranging from 1 to KFThe size of the TB is according to the KFAn
Figure FDA0002015069350000024
Is determined;
the size of the TB is determined according to the number of RBs included in the reference frequency domain resource
Figure FDA0002015069350000025
The method comprises the steps of determining, wherein,
Figure FDA0002015069350000026
is a positive integer, said KFThe frequency domain resources comprise the reference frequency domain resource; or
The size of the TB is according to a first reference value NrefIs determined in which NrefIs a positive integer.
7. The method according to claim 5 or 6,
when receiving the TB, the method comprises the steps of carrying out channel decoding on the TB and carrying out rate de-matching according to a Redundancy Version (RV);
at kth time unitfWhen receiving the TB on a frequency domain resource, using the first time in the RV sequence
Figure FDA0002015069350000027
Figure FDA0002015069350000028
Performing rate de-matching on the RVs, wherein the RV sequence comprises
Figure FDA0002015069350000029
The number of the RV is one,
Figure FDA00020150693500000210
is a positive integer, kfIs a value ranging from 1 to Kt，FIs an integer of，K0，FEqual to 0.
8. The method according to any one of claims 5 to 7,
the K at the t time unitt，FRepeatedly receiving the TB in one frequency domain resource, at the Kt，FBy K in one frequency domain resourcet，FRepeatedly receiving the TB by a plurality of PUSCHs;
the method further comprises the following steps: receiving the Kt，FK of PUSCHt，FA demodulation reference signal (DMRS);
wherein, K ist，FKth in DMRSfThe sequence value of DMRS is determined according to kth of scrambling value setfA scrambling value is determined, where kfIs greater than or equal to 1 and less than or equal to Kt，FThe set of scrambling values includes Kt，FA scrambling value.
9. An apparatus for carrying out the method of any one of claims 1 to 8.
10. An apparatus comprising a processor and a memory, the processor coupled with the memory, the processor configured to perform the method of any of claims 1-8.
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