CN111435859A

CN111435859A - Transmitting and receiving method and device

Info

Publication number: CN111435859A
Application number: CN201910028833.1A
Authority: CN
Inventors: 胡丹; 官磊; 李�远
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2020-07-21
Anticipated expiration: 2039-01-11
Also published as: WO2020143366A1; CN111435859B

Abstract

The application provides a sending method, a receiving method and a device. The method comprises the following steps: the terminal equipment determines a transport block size TBS of a data packet according to Resource Elements (RE) which are used for bearing data information and are included in N transmission occasions and a first modulation coding mode, wherein N is an integer larger than 1; each of the N transmission opportunities is for transmitting a data packet once; when the code rate corresponding to a first transmission opportunity in N transmission opportunities borne by the data packet corresponding to the TBS is greater than a code rate threshold, the terminal equipment determines a second modulation coding mode, wherein a modulation order corresponding to the second modulation coding mode is higher than a modulation order corresponding to the first modulation coding mode; and the terminal equipment transmits the data packet at least one transmission opportunity in the N transmission opportunities according to the TBS and the second modulation coding mode. According to the method and the device, the modulation order of the transmission opportunity is adjusted, so that the code rate of the transmission opportunity is reduced, and the problem caused by overlarge code rate of the transmission opportunity is avoided.

Description

Transmitting and receiving method and device

Technical Field

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

Background

With the continuous development of communication technology, the requirement on transmission reliability is higher and higher.

In order to improve the reliability of transmission, the terminal device may send data packets to the network device at a plurality of transmission occasions, respectively, that is, repeatedly transmit the data packets at a plurality of transmission occasions. Generally, a Transport Block Size (TBS) may be determined according to a time-frequency resource and a modulation and coding scheme of one transmission occasion of a plurality of transmission occasions, and data may be repeatedly transmitted at a plurality of transmission occasions according to the determined TBS and the modulation and coding scheme. Further, in order to improve scheduling flexibility, when the data is repeatedly transmitted in multiple transmission occasions, a method for determining the TBS according to the time-frequency resources and modulation coding modes of the multiple transmission occasions is provided.

However, when determining the TBS according to the time-frequency resources of multiple transmission occasions and the modulation and coding schemes, how to determine the modulation and coding scheme of each transmission occasion becomes a problem to be solved.

Disclosure of Invention

The application provides a sending and receiving method and a device, which are used for determining a modulation coding mode of each transmission opportunity when determining TBS according to time-frequency resources and modulation coding modes of a plurality of transmission opportunities.

In a first aspect, an embodiment of the present application provides a sending method, including:

the terminal equipment determines TBS of a data packet according to RE used for bearing data information and a first modulation coding mode which are included in N transmission occasions, wherein N is an integer larger than 1; each of the N transmission occasions is used for transmitting the data packet once; when the first code rate is greater than a code rate threshold, the terminal device determines a second modulation and coding mode, where the first code rate is a code rate corresponding to a first transmission opportunity, among the N transmission opportunities, that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the second modulation and coding mode is higher than a modulation order corresponding to the first modulation and coding mode; the terminal device sends the data packet at least one transmission time of the N transmission times according to the TBS and the second modulation and coding mode.

In the above scheme, the terminal device determines the TBS of the data packet according to the RE for carrying data information and the first modulation and coding scheme included in the N transmission occasions, determines the second modulation and coding scheme with a modulation order smaller than the first modulation and coding scheme when the data packet corresponding to the TBS is carried at the code rate (which may be denoted as the first code rate) corresponding to the first transmission occasion and is greater than the threshold of the code rate, and transmits the data packet at least one of the N transmission occasions according to the TBS and the second modulation and coding scheme.

In one possible implementation, the time domain length of each of the N transmission occasions is equal.

In the above scheme, repetition with equal time domain length can be achieved by the equal time domain length of each of the N transmission occasions. Here, the time domain length of each of the N transmission occasions may be less than a first time unit, which may be, for example, a time slot. The second time unit may be smaller than the first time unit, and further, a time domain length of each of the N transmission occasions may be smaller than or equal to the second time unit.

In one possible implementation, the time domain length of each of the N transmission occasions is unequal.

In the above scheme, repetition with completely unequal time domain lengths can be realized by unequal time domain lengths of each of the N transmission opportunities, and the flexibility of repeated transmission is improved. Here, a time domain length of one of the N transmission occasions may be less than or equal to a first time unit, which may be, for example, a time slot.

In one possible implementation, the at least one transmission opportunity is the first transmission opportunity.

In the above scheme, by using at least one transmission opportunity as the first transmission opportunity, it may be achieved that the data packet is sent according to the second modulation and coding scheme for the first transmission opportunity, and the data packet may be sent according to a modulation and coding scheme other than the second modulation and coding scheme for the other transmission opportunities except the first transmission opportunity among the N transmission opportunities.

In one possible implementation, the time domain lengths of some of the N transmission occasions are equal.

In the above scheme, by equalizing the time domain lengths of some of the N transmission opportunities, repetition with incompletely equalized time domain lengths can be realized, and the flexibility of repeated transmission is improved. Here, a time domain length of one of the N transmission occasions may be less than or equal to a first time unit, which may be, for example, a time slot.

In one possible implementation, the at least one transmission occasion is the first transmission occasion and a transmission occasion equal to a time domain length of the first transmission occasion.

In the foregoing solution, by using at least one transmission opportunity as the first transmission opportunity and the transmission opportunity with the time domain length equal to that of the first transmission opportunity, it may be achieved that for the first transmission opportunity and the transmission opportunity with the time domain length equal to that of the first transmission opportunity, the data packet is sent according to the second modulation and coding scheme, and for the other transmission opportunities except for the transmission opportunities among the N transmission opportunities, the data packet may be sent according to modulation and coding schemes other than the second modulation and coding scheme.

In one possible implementation, the method further comprises: when the second code rate is greater than the code rate threshold, the terminal device determines a third modulation and coding scheme, where the second code rate is a code rate corresponding to a second transmission opportunity, of the N transmission opportunities, that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme; the terminal device transmits the data packet at the second transmission time according to the TBS and the third modulation and coding scheme. Wherein the first transmission timing is different from the second transmission timing.

In the foregoing scheme, when the code rate (which may be referred to as a second code rate) corresponding to a second transmission opportunity of the N transmission opportunities is greater than the code rate threshold, the terminal device determines a third modulation and coding scheme, and sends the data packet at the second transmission opportunity according to the TBS and the third modulation and coding scheme, so that the data packet can be sent at a second transmission opportunity except for the first transmission opportunity (or a transmission opportunity that may include a transmission opportunity with a time domain length equal to that of the first transmission opportunity) according to the second code rate, thereby improving the flexibility of repeated transmission.

In one possible implementation, the at least one transmission opportunity is a transmission opportunity of the N transmission opportunities to transmit the data packet.

In one possible implementation, the first transmission opportunity is a transmission opportunity with the longest time domain length among the N transmission opportunities.

In the above scheme, the first transmission opportunity is the transmission opportunity with the longest time domain length among the N transmission opportunities, so that when the transmission is repeated for multiple times, the first transmission opportunity can send all information bits. The advantage of this is that the terminal equipment can select the minimum combination of code rate and modulation mode during adjustment to transmit the most redundant information, thereby improving the reliability of transmission.

In one possible implementation, the first transmission opportunity is a transmission opportunity with the shortest time domain length among the N transmission opportunities.

In the above scheme, when the first transmission time is the transmission time with the shortest time domain length among the N transmission times, for other transmission times in which the time domain length among the N transmission times is greater than the first transmission time, after the information bits corresponding to the TBS are transmitted, there is no data on the remaining resources. Zero padding may be used on the remaining resources, or redundant bits may be added. This has the advantage that the terminal device can send all information bits at every transmission opportunity, and the network device can obtain the maximum combining gain during decoding.

In one possible implementation, the code rate threshold is dynamically indicated, predefined, or preconfigured.

In a second aspect, an embodiment of the present invention provides a receiving method, including:

the network equipment determines a transport block size TBS of a data packet according to Resource Elements (RE) which are used for bearing data information and are included in N transmission occasions and a first modulation coding mode, wherein N is an integer larger than 1; each of the N transmission occasions is used for transmitting the data packet once; the network device receives the data packet corresponding to the TBS sent by the terminal device in at least one of the N transmission occasions by using a second modulation and coding scheme, where a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the second modulation and coding scheme is determined when a first code rate of the terminal device is higher than a code rate threshold, and the first code rate is a code rate corresponding to the first transmission occasion and borne by the data packet corresponding to the TBS.

In the above scheme, the network device determines the TBS of the data packet according to the REs for carrying data information and the first modulation and coding scheme included in the N transmission occasions, and receiving the data packet corresponding to the TBS sent by the terminal device in at least one of the N transmission occasions by using a second modulation and coding scheme, the modulation order corresponding to the second modulation coding mode is higher than the modulation order corresponding to the first modulation coding mode, the second modulation coding mode is determined by the terminal equipment when the first code rate is larger than a code rate threshold value, the first code rate is the code rate corresponding to the first transmission time carried by the data packet corresponding to the TBS, and provides a method for determining the TBS according to the time-frequency resources of a plurality of transmission times and the modulation and coding scheme by adjusting the modulation order of the transmission time, therefore, the mode of reducing the code rate of the transmission opportunity avoids the problem caused by overlarge code rate of the transmission opportunity.

In one possible implementation, the method further comprises:

the network device receives the data packet corresponding to the TBS sent by the terminal device in a second transmission opportunity of the N transmission opportunities by using a third modulation and coding scheme, where a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the third modulation and coding scheme is determined when a second code rate is higher than a code rate threshold, and the second code rate is a code rate corresponding to the second transmission opportunity carried by the data packet corresponding to the TBS; the first transmission timing is different from the second transmission timing.

In a third aspect, an embodiment of the present application further provides a sending apparatus, configured to implement the method described in the first aspect. The transmitting apparatus is a transmitting apparatus that implements the method described in the first aspect for a terminal device or a supporting terminal device, for example, the transmitting apparatus includes a system-on-chip. For example, the transmission device includes: the device comprises a processing module and a sending module. A processing module, configured to determine a transport block size TBS of a data packet according to resource elements RE used for carrying data information and included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used for transmitting the data packet once; the processing module is configured to determine a second modulation and coding scheme when a first code rate is greater than a code rate threshold, where the first code rate is a code rate corresponding to a first transmission time of the N transmission times, where the data packet corresponding to the TBS is carried, and a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme; a sending module, configured to send the data packet at least one transmission opportunity of the N transmission opportunities according to the TBS determined by the processing module and the second modulation and coding scheme.

In a possible implementation, the processing module is further configured to determine a third modulation and coding scheme when a second code rate is greater than the code rate threshold, where the second code rate is a code rate that is borne by the data packet corresponding to the TBS at a second transmission time of the N transmission times, and a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme; the sending module is further configured to send the data packet at the second transmission opportunity according to the TBS and the third modulation and coding scheme; the first transmission timing is different from the second transmission timing.

In a fourth aspect, an embodiment of the present application further provides a receiving apparatus, configured to implement the method described in the second aspect. The sending apparatus is a network device or a receiving apparatus supporting the network device to implement the method described in the second aspect, for example, the receiving apparatus includes a chip system. For example, the receiving apparatus includes: the device comprises a processing module and a receiving module. A processing module, configured to determine a transport block size TBS of a data packet according to resource elements RE used for carrying data information and included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once;

a receiving module, configured to receive the data packet corresponding to the TBS sent by a terminal device in at least one transmission time of the N transmission times by using a second modulation and coding scheme, where a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the second modulation and coding scheme is determined when a first code rate of the terminal device is greater than a code rate threshold, and the first code rate is a code rate corresponding to the first transmission time and borne by the data packet corresponding to the TBS.

In a possible implementation, the processing module is further configured to receive the data packet corresponding to the TBS, where the data packet is sent by a terminal device in a third modulation and coding manner at a second transmission time of the N transmission times, where a modulation order corresponding to the third modulation and coding manner is higher than a modulation order corresponding to the first modulation and coding manner, the third modulation and coding manner is determined when a second code rate is higher than a code rate threshold, and the second code rate is a code rate corresponding to the second transmission time and borne by the data packet corresponding to the TBS; the first transmission timing is different from the second transmission timing.

In a fifth aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing a behavior of the terminal device in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.

In one possible implementation, the structure of the terminal device includes a processor and a transceiver, where the processor is configured to determine a transport block size TBS of a data packet according to resource elements RE used for carrying data information and included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once. The processor is further configured to determine a second modulation and coding scheme when a first code rate is greater than a code rate threshold, where the first code rate is a code rate that the data packet corresponding to the TBS is borne in the first transmission opportunity of the N transmission opportunities, and a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme. The transceiver is configured to support the terminal device to transmit the data packet at least one transmission opportunity of the N transmission opportunities according to the TBS determined by the processor and the second modulation and coding scheme.

In one possible implementation, the processor is further configured to determine a third modulation and coding scheme when a second code rate is greater than the code rate threshold, where the second code rate is a code rate that the data packet corresponding to the TBS is carried at a second transmission opportunity of the N transmission opportunities, and a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme. A transceiver, configured to support a terminal device to send the data packet at the second transmission opportunity according to the TBS and the third modulation and coding scheme; the first transmission timing is different from the second transmission timing.

In a sixth aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing a behavior of the network device in practice. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible implementation, a network device includes a processor and a transceiver, where the processor is configured to determine a transport block size TBS of a data packet according to resource elements RE for carrying data information included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once. The transceiver is configured to support a network device to receive the data packet corresponding to the TBS, where the data packet is sent by a terminal device in at least one of the N transmission occasions by using a second modulation and coding scheme, where a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the second modulation and coding scheme is determined when a first code rate of the terminal device is higher than a code rate threshold, and the first code rate is a code rate that is borne by the data packet corresponding to the TBS and corresponds to the first transmission occasion. The network device may also include a memory, coupled to the processor, that retains program instructions and data necessary for the network device.

In a possible implementation, the receiver is further configured to support the network device to receive the data packet corresponding to the TBS, where the data packet is sent by a terminal device in a third modulation and coding manner at a second transmission time among the N transmission times, where a modulation order corresponding to the third modulation and coding manner is higher than a modulation order corresponding to the first modulation and coding manner, the third modulation and coding manner is determined when a second code rate of the terminal device is higher than a code rate threshold, and the second code rate is a code rate that is borne by the data packet corresponding to the TBS at the second transmission time; the first transmission timing is different from the second transmission timing.

In a seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, including: computer software instructions; the computer software instructions, when executed in a transmitting apparatus, cause the transmitting apparatus to perform the method of the first aspect described above.

In an eighth aspect, an embodiment of the present application further provides a computer-readable storage medium, including: computer software instructions; the computer software instructions, when executed in the receiving apparatus, cause the receiving apparatus to perform the method of the second aspect described above.

In a ninth aspect, embodiments of the present application further provide a computer program product including instructions, which, when run in a sending apparatus, cause the sending apparatus to execute the method according to the first aspect.

In a tenth aspect, embodiments of the present application further provide a computer program product including instructions, which, when run in a receiving apparatus, cause the receiving apparatus to perform the method according to the second aspect.

In an eleventh aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the functions of the network device or the terminal device in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a twelfth aspect, an embodiment of the present application further provides a communication system, where the communication system includes the terminal device described in the third aspect or a transmitting apparatus supporting the terminal device to implement the method described in the first aspect, and the network device described in the fourth aspect or a receiving apparatus supporting the network device to implement the method described in the second aspect;

or the communication system comprises the terminal device described in the fifth aspect or a transmitting device supporting the terminal device to implement the method described in the first aspect, and the network device described in the sixth aspect or a receiving device supporting the network device to implement the method described in the second aspect.

In addition, the technical effects brought by the design manners of any aspect can be referred to the technical effects brought by the different design manners in the first aspect and the second aspect, and are not described herein again.

In the embodiment of the present application, names of the terminal device, the network device, and the information indicating apparatus do not limit the device itself, and in actual implementation, the devices may appear by other names. Provided that the function of each device is similar to the embodiments of the present application, and fall within the scope of the claims of the present application and their equivalents.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an application scenario provided in an embodiment of the present application;

fig. 3 is a flowchart of a transmitting and receiving method according to an embodiment of the present application;

fig. 4A to fig. 4F are schematic diagrams of time domain lengths of transmission occasions according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a transmitting apparatus according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a receiving apparatus according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another receiving apparatus provided in the present application;

fig. 8 is a schematic structural diagram of another receiving apparatus according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system includes a core network device 110, a radio access network device 120, and at least one terminal device (e.g., terminal device 130 and terminal device 140 in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or the function of the core network device and the logical function of the radio access network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the radio access network device. The terminal equipment may be fixed or mobile. Fig. 1 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the communication system.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as a global System for mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) System, a General Packet Radio Service (GPRS), a long term evolution (L ong telecommunications, lttt transport = L & "ltt &" gte) System, a L TE frequency Division duplex (frequency Division duplex, FDD) System, a L time Division duplex (time Division duplex, TDD), a Universal mobile communication System (Universal mobile communication, UMTS), a Worldwide interoperability (UMTS) System, a future radio Access (WiMAX) System, a future radio Access (NR 5) System, and the like.

A terminal device in this embodiment may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (W LL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (P L MN), or a terminal device in an NR communication system, and so on, which are not limited by this embodiment.

By way of example, and not limitation, in embodiments of the present invention, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

The network device in this embodiment may be a device for communicating with a terminal device, and the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB ) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved node b (eNB, or eNodeB) in an L NB TE system, may also be a wireless controller in a cloud radio Access network (C-RAN) scenario, or may be a relay station, NodeB, a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved P L MN network, or a new generation base station (new generation base station) in an NR system, and the like.

In addition, in this embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), where the small cell may include: urban cell (metro cell), micro cell (microcell), pico cell (picocell), femto cell (femto cell), etc., these small cells have the characteristics that coverage is little, transmission power is low, are applicable to providing the data transmission service of high rate.

In the embodiments of the present application, a terminal device or a network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer, where the hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory).

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The basic knowledge related to the present application will be described first.

International Telecommunications Union (ITU) defines three major application scenarios for 5G and future Mobile communication systems, Enhanced Mobile Broadband (eMBB), high-reliability low-latency communication (Ultra-Reliable and L ow-L activity Communications, UR LL C), and mass Machine-Type communication (mtc).

Typical UR LL C services include wireless control in industrial manufacturing or production flow, motion control of unmanned vehicles and unmanned airplanes, remote repair, remote operation and other touch interactive applications, and the services are mainly characterized by requirements of ultrahigh reliability, low delay, less transmitted data volume and burstiness.

It should be appreciated that the NR system supports various time scheduling units, which may be one or more time domain symbols in length. The time domain symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol. The OFDM symbols may or may not use transform precoding (transform precoding). If the OFDM symbol uses transform precoding, it may also be referred to as single carrier-frequency division multiplexing (SC-FDM). The NR system is composed of slots (slots), and one slot may include 14 symbols. The NR system also supports various subcarrier spacings. The time lengths corresponding to slots in different subcarrier intervals may be different. For example, when the subcarrier spacing is 15kHz, the time length corresponding to one slot may be 1 ms. For another example, when the sub-carriers are spaced apart by 30kHz, the time length corresponding to one slot may be 0.5 ms. For another example, when the sub-carriers are spaced apart by 60kHz, the time length corresponding to one slot may be 0.25 ms. As another example, when the sub-carriers are spaced apart by 120kHz, the time length corresponding to one slot may be 0.125 ms. It should be understood that, since the number of symbols of a slot may be configured to be a fixed value, for example, 14 symbols, the time length corresponding to a symbol may also vary with the subcarrier spacing.

The time-frequency domain resources include time domain resources and/or frequency domain resources. The frequency domain resource may be one or more Resource Blocks (RBs), one or more Resource Elements (REs), one or more carriers/cells, one or more fractional Bandwidths (BWPs), one or more RBs over one or more BWPs over one or more carriers, or one or more REs over one or more RBs over one or more BWPs over one or more carriers. The time domain resource may be one or more time slots or one or more symbols over one or more time slots.

In a wireless communication system, reference signals need to be transmitted for uplink data transmission (data is sent from a terminal device to a network device) or downlink data transmission (data is sent from the network device to the terminal device). This is because the receiving end needs to perform channel estimation on the channel using the reference signal before performing data decoding, and further uses the result of the channel estimation to eliminate the influence of the spatial channel on the data, thereby performing decoding.

For downlink transmission, if the downlink transmission is based on dynamic scheduling, the terminal device may receive downlink control information DCI for indicating the PDSCH, where the DCI may carry indication information such as time-frequency domain resources and modulation modes used for indicating that the PDSCH occupies. The terminal device, upon receiving the DCI, can determine on which resource to receive the PDSCH. Further, after receiving the PDSCH, the terminal device may feed back the final decoding result to the network device. If the terminal equipment receives the PDSCH correctly, the fed back information is an Acknowledgement (ACK), and if the terminal equipment receives the PDSCH incorrectly, the fed back information is a Negative Acknowledgement (NACK). The ACK and NACK may be collectively referred to as hybrid automatic repeat request (HARQ) information in the communication system. Generally, the terminal device feeds back HARQ information corresponding to the PDSCH, so that the network device can quickly retransmit the terminal device after learning that the terminal device has received an error, thereby ensuring reliability of data transmission.

Initially, in order to improve transmission reliability, it is proposed that a terminal device may transmit data to a network device at a plurality of transmission occasions, respectively, and determine a TBS according to a time-frequency resource and a modulation and coding scheme of one of the plurality of transmission occasions, and repeatedly transmit the data at the plurality of transmission occasions according to the modulation and coding scheme and the TBS (hereinafter, referred to as scheme 1). Specifically, each of the plurality of transmission opportunities may include M1 symbols, repeating M2 times.

However, the repeated transmission in the method 1 has a problem of poor scheduling flexibility. Therefore, a scheme (hereinafter, referred to as scheme 2) is proposed in which a TBS is determined according to time-frequency resources and modulation and coding schemes of a plurality of transmission occasions, and is repeatedly transmitted in a plurality of transmission occasions according to the TBS.

Taking the example of M1 equal to 2, M2 equal to 4, and target TBS equal to 100 bytes (bytes) and 250 bytes, assuming a bandwidth of 40MHz and a subcarrier spacing SCS of 60 kHz. Determining the number (N) of all Physical Resource Blocks (PRBs) capable of supporting obtaining the target TBS based on all MCS indexes (indexes) in a MCS table specified by a protocol_PRB) In this way, the corresponding MCS index is selected as shown in tables 1 and 2 below.

TABLE 1

TABLE 2

As can be seen from tables 1 and 2, to obtain the same TBS for { MCS, N, compare TBS calculated according to mode 1 with TBS calculated according to mode 2_PRBThe selectivity of the combination is worse. For example, for a target TBS equal to 100 bytes, calculating TBS according to mode 1 may be from 18 { MCS, N }_PRBOne of the combinations is selected, and calculating TBS according to mode 2 can be selected from 23 { MCS, N }_PRBAnd selecting one of the combinations. Therefore, calculating TBS according to mode 2 has better scheduling flexibility.

In table 1 and table 2, "8 symbols, repetition 1 time" indicates that { MCS, N, which can be selected for determining the target TBS, can be selected_PRBThe combination, at a specific transmission, can be according to the selected { MCS, N }_PRBCombine, repeat 4 times according to "2 symbolsThe transmission is performed in a manner.

The present application is mainly used to describe how to determine the modulation and coding scheme of each transmission opportunity in the above scheme 2.

For the purpose of understanding the embodiments of the present application, the related terms referred to herein will be briefly described below.

1. Slot (slot): a minimum scheduling unit of time domain resources, in NR, a format of a slot may include 14 orthogonal frequency division multiple access (OFDM) symbols, and a CP of each OFDM symbol is a normal CP; alternatively, one slot format may include 12 OFDM symbols, and the CP of each OFDM symbol is an extended CP; alternatively, one slot format may be to include 7 OFDM symbols, with the CP of each OFDM symbol being a normal CP. The OFDM symbols in one slot may be all used for uplink transmission; can be used for downlink transmission; or one part can be used for downlink transmission, one part can be used for uplink transmission, and one part is reserved for no transmission. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way. The slot format is not limited to the above example for system forward compatibility considerations. In NR, different numbers of slots (slots) may be included in 1ms according to different subcarrier intervals, for example, when a subcarrier interval is 15kHz, 1ms includes 1 slot, and the slot occupies 1 ms; when the subcarrier spacing is 30kHz, 1ms includes 2 slots, each of which occupies 0.5 ms.

2. Symbol (symbol): the symbol may also be referred to as a time domain symbol, which is a minimum unit of a time domain resource, and the time length of one symbol is not limited in the embodiments of the present application. The length of one symbol may be different for different subcarrier spacings. The symbols may include uplink symbols and downlink symbols, and the uplink symbols may be referred to as single carrier-frequency division multiple access (SC-FDMA) symbols or OFDM symbols, for example and without limitation; the downlink symbols may be referred to as OFDM symbols, for example.

3. Resource Element (RE): may be referred to as resource element, a minimum scheduling unit of time-frequency resources, one RE may occupy 1 OFDM symbol in the time domain, and may occupy 1 subcarrier in the frequency domain. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way. The RE format is not limited to the above example for system forward compatibility considerations.

4. Transport Block Size (TBS): the amount of data (number of bits) carried on a transport block.

5. Physical Resource Block (PRB), which corresponds to resource elements representing one symbol in the time domain and one subcarrier in the frequency domain, in the long term evolution (L TE) protocol, one physical resource block may be composed of 14x12 resource elements, where 14 represents 14 symbols in one slot and 12 represents 12 subcarriers in one frequency band, it is understood that the number of resource elements in one physical resource block may be less than 14x12 when the time unit of the physical resource block is less than the slot.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 3 is a flowchart of a transmitting and receiving method according to an embodiment of the present application. In this embodiment, it is mainly described that the terminal device repeatedly sends data to the network device in N transmission occasions, and the network device may be, for example, the wireless access network device, as shown in fig. 3, the method of this embodiment may include:

step 301, the terminal device determines the TBS according to the REs for carrying data information and the first modulation and coding scheme included in the N transmission occasions, where N is an integer greater than 1.

In this step, each transmission opportunity of the N transmission opportunities is used to transmit the data packet once. It can be understood that, in the process of actually sending the data packet, the terminal device may use all of the N transmission occasions, or may use one transmission occasion or a part (two or more) of the N transmission occasions, which is not limited in this application.

Wherein, the Transmission Opportunity (TO) may represent a time-domain scheduling granularity of data scheduling. Optionally, the time-domain scheduling granularity may be smaller than a first time unit, or the time-domain scheduling granularity may be smaller than or equal to a second time unit, where the second time unit is smaller than the first time unit. With the symbol as the minimum unit of the time domain resource, the first time unit may include a plurality of symbols, the second time unit may include one or more symbols, and the number of symbols included in the second time unit is smaller than that of the first time unit. For the first time unit and the second time unit, the following description is made:

specifically, the International Telecommunications Union (ITU) defines three major application scenarios for 5G and future mobile communication systems, namely Enhanced mobile broadband (eMBB), high-reliability low-latency communication (Ultra-Reliable and L ow-L elementary Communications, UR LL C), and Massive Machine-Type Communications (mtc).

In addition, the UR LL C service has a very high requirement on the delay, for a typical application scenario of the UR LL C, specifically, for example, the reliability required by the transportation industry (transport to evolution, information exchange between a vehicle and the outside world) is 99.999%, the end-to-end delay is 5ms, the reliability required by power distribution (power distribution) is 99.9999%, the end-to-end delay is 5ms, the reliability of Factory automation (Factory automation) is 99.9999%, and the end-to-end delay is 2 ms., however, the requirement of the mtc service on the delay is lower than that of the UR LL C service.

It can be seen that, because the UR LL C service and the eMBB service have different delay requirements for the communication system, on the basis that the time domain scheduling granularity of the transmission opportunity under the eMBB service is the first time unit (or may also be referred to as a time unit, which is not limited in this application), for the UR LL C service that requires higher delay for adaptation, the time domain scheduling granularity smaller than the first time unit, that is, the second time unit (or may also be referred to as a micro time unit, a mini-slot, a non-slot, etc., which is not limited in this application) is proposed.

It should be noted that, as to the dividing manner of the first time unit, the present application is not limited, and optionally, the first time unit may be a time slot, a subframe, and the like. Any time unit that meets less than the first time unit may be considered a second time unit. For example, the first time unit may be referred to as a slot (slot), and the second time unit may be referred to as a minislot; alternatively, the first time unit may be referred to as a subframe, and the second time unit may be referred to as a micro-subframe; and so on. Wherein, a timeslot may include 14 symbols, and a minislot includes a number of symbols less than 14, such as 2, 4, 7, etc.; alternatively, a slot may for example comprise 14 symbols, and a minislot may comprise a number of symbols less than 14, such as 1, 2, 3, 4,5, 6, 7, 8, 9, 10, 11, 12 or 13; or, for example, a timeslot may include 7 symbols, and a minislot includes symbols less than 7, such as 2 or 4, and the specific value is not limited.

It should be noted that, the present application may not be limited to the relationship between the time domain lengths of each of the N transmission occasions. Optionally, the time domain length of each of the N transmission occasions is equal. Here, the time domain length of each of the N transmission occasions may be less than the first time unit when the time domain length of each of the N transmission occasions is equal. The first time unit may be a slot or a subframe, which is 14 OFDM symbols. It may also be N slots, or N subframes, 14 × N OFDM symbols. Further optionally, the time domain length of each of the N transmission occasions is equal to the second time unit. The second time unit may be less than the first length of time. For example, taking N equal to 4 as an example, as shown in fig. 4A, the time domain lengths of transmission occasions 1 to 4 are all equal to the second time unit. For another example, taking N equal to 2 as an example, as shown in fig. 4B, the time domain lengths of transmission opportunity 1 to transmission opportunity 2 are all equal to the second time unit. For another example, taking N equal to 8 as an example, as shown in fig. 4C, the time domain lengths of transmission occasions 1 to 8 are all equal to the second time unit.

Or, optionally, the time domain lengths of some of the N transmission occasions are equal. As shown in fig. 4D, transmission opportunity 1 is equal in time domain length to transmission opportunity 2 and different in time domain length from transmission opportunity 3 and transmission opportunity 4. The time domain boundaries of transmission opportunities 3 and 4 may be the boundaries of a time slot.

Or, optionally, the time domain length of each of the N transmission occasions is unequal. For example, taking N equal to 2 as an example, as shown in fig. 4E, the time domain lengths of transmission opportunity 1 and transmission opportunity 2 are not equal. The boundary between transmission opportunity 1 and transmission opportunity 2 is a slot boundary. For another example, taking N equal to 3 and the first time unit as the time slot, as shown in fig. 4F, the time domain lengths of transmission opportunity 1 and transmission opportunity 3 are smaller than and unequal to each other, and the time domain length of transmission opportunity 2 is equal to the time slot. And the boundaries between transmission opportunities are slot boundaries.

Illustratively, step 301 may further include, before: the terminal device receives configuration information or indication information sent by the radio access network device, where the configuration information or the indication information may be used to indicate a time-frequency resource (i.e., a total time-frequency resource of N transmission occasions) and a first modulation and coding scheme.

For example, if the terminal device is based on scheduling (grant-based), the terminal device may receive indication information sent by the radio access network device, and the indication information may specifically be Downlink Control Information (DCI). Further optionally, the indication information may further include a number of times of retransmission, that is, N.

For example, if the scheduling free/configured grant is used, the terminal device may receive the configuration information sent by the radio access network device. Further, the configuration information may further include the number of times of retransmission, i.e., N.

For example, the number of repeated transmissions may be configured by a higher layer parameter, or may be determined by the terminal device according to the retransmission, which is not limited in this application.

For example, the network device may notify the terminal device of time-frequency resources of each of the N transmission occasions (e.g., in fig. 4C, the network device notifies the terminal device of time-domain resources of each of transmission occasion 1, transmission occasion 2, and transmission occasion 3); or, the network device may notify the terminal device of the time-frequency resource of the first transmission opportunity in the N transmission opportunities, and determine the time-frequency resource of each of the N transmission opportunities by the terminal device (for example, as shown in fig. 4B, the network device notifies the terminal device of the time-frequency resource of transmission opportunity 1 in 2 transmission opportunities, and the terminal device determines the time-frequency resource of transmission opportunity 2 in 2 transmission opportunities); or, the network device may notify the terminal device of repeatedly transmitting a total time-frequency resource, and the terminal device determines the time-frequency resources of the N transmission occasions in the total time-frequency resource (for example, as shown in fig. 4D-4F, the network device configures the total time-frequency resources of the transmission occasions, and the terminal device may determine the time-frequency resources of the N transmission occasions according to the time slot boundary); or, the network device may notify the terminal device of the time-frequency resources for 1 transmission, and the terminal device may determine the time-frequency resources of each of the N transmission occasions according to the time-frequency resources for 1 transmission (for example, as shown in fig. 4B, the network device notifies the terminal device of the time-frequency resources for transmission occasion 1, and the terminal device determines that N is equal to 2, and determines the time-frequency resources for transmission occasion 2); or, the network device may notify the terminal device of the respective time-frequency resources of the N ' transmission occasions, and the UE may determine the respective video resources of the N transmission occasions according to the respective time-frequency resources of the N ' transmission occasions, where N ' is different from N.

For example, the first modulation and coding scheme may be configured by a network device, and similarly, may be based on scheduling (Grant-based) or scheduling-free (Grant-free); alternatively, the first modulation and coding scheme may be predefined or preconfigured by the terminal device.

According to transport block size N_TBSAnd the number N of REs_REModulation order Q_mAnd the code rate code may satisfy the following formula (1).

N_TBS＝coderate×N_RE×Q_mFormula (1)

Thus, the TBS may be determined according to the REs for carrying data information included in the N transmission occasions and the first modulation and coding scheme. Specifically, based on formula (1), the TBS may be determined according to the REs used for carrying the data information, the modulation order corresponding to the first modulation and coding scheme, and the code rate corresponding to the first modulation and coding scheme, which are included in the N transmission occasions.

For example, for convenience of calculation, when determining the TBS according to the time-frequency resources of the N transmission occasions and the first modulation and coding scheme, overhead (overhead) factors may not be considered, and the overhead factors may include, for example, demodulation reference signal (DMRS) overhead, parameter configuration overhead, and the like. Specifically, the number N of PRBs that may be included in N transmission occasions_PRBThe number of subcarriers N included in one PRB_cAnd the number of symbols N included in the N transmission occasions_sAs the number of REs N included for the N transmission occasions_RE。

Optionally, the data information may include Uplink Control Information (UCI), and the UCI may be feedback information HARQ-ACK, channel state information csi (channel status information), channel quality indication information cqi (channel quality indicator), scheduling request sr (scheduling request), and the like.

For example, N is equal to 4, the time domain length of each of the 4 transmission opportunities is the same and is 2 symbols, the modulation order corresponding to the first modulation and coding scheme is 2, the code rate corresponding to the first modulation and coding scheme is 251/1024, and N is equal to N_cIf the transmission block size is equal to 12, the transmission block size N is determined according to the REs included in the 4 transmission opportunities and the first modulation and coding mode_TBSThe following formula (2) is satisfied.

N_TBS＝＝251/1024×(N_PRB× 12 × 2 × 4) × 2 equation (2)

For example, N is equal to 2, the time domain length of one of the 2 transmission occasions is 2 symbols, the time domain length of the other transmission occasion is 6 symbols, the modulation order corresponding to the first modulation and coding scheme is 2, the code rate corresponding to the first modulation and coding scheme is 679/1024, N is_cEqual to 12, the transport block size N is determined according to the REs included in the 2 transmission occasions and the first modulation and coding scheme_TBSThe following formula (3) is satisfied.

N_TBS＝＝679/1024×(N_PRB× 12 × (2+4)) × 2 equation (3)

For example, the Modulation Order (Modulation Order) and the code Rate (Target code Rate) corresponding to the first Modulation and coding scheme may be determined by referring to table 3 below according to the MCS index indicating the first Modulation and coding scheme.

TABLE 3

For example, N is equal to 4, the time domain length of each of the 4 transmission opportunities is the same and is 2 symbols, and based on table 3, the MCS index for indicating the first modulation and coding scheme is equal to 9. For N equal to 2, where the time domain length of one of the 2 transmission occasions is 2 symbols and the time domain length of the other transmission occasion is 6 symbols, based on table 3, the MCS index used for indicating the first modulation and coding scheme is equal to 15.

Step 302, when the data packet corresponding to the TBS is carried at a code rate corresponding to a first transmission opportunity of the N transmission opportunities and is greater than a code rate threshold, the terminal device determines a second modulation and coding scheme.

In this step, the modulation order corresponding to the second modulation and coding scheme is higher than the modulation order corresponding to the first modulation and coding scheme. Here, the data packet corresponding to the TBS is carried at a first transmission timing, that is, the size of the data packet transmitted at the first transmission timing is the TBS.

For a certain modulation and coding scheme, the size of the data packet transmitted at the first transmission time is made to reach the TBS by adjusting the code rate corresponding to the modulation and coding scheme, not adjusting the modulation order corresponding to the modulation and coding scheme. Moreover, since the size of the data packet transmitted at the first transmission opportunity is the TBS, the TBS is determined according to the REs included in the N transmission opportunities for carrying data information, and the number of the REs included in the N transmission opportunities for carrying data information is greater than the number of the REs included in the first transmission opportunity for carrying data information, a code rate (hereinafter referred to as a first code rate) corresponding to the data packet carried at the first transmission opportunity corresponding to the TBS may be greater than a code rate corresponding to the first modulation and coding scheme.

It should be noted that the first code rate is determined according to the modulation order of the first modulation and coding scheme, the TBS, and the REs of the first transmission opportunity. For example, N is equal to 4, the time domain length of each of the 4 transmission occasions is the same and is 2 symbols, the modulation order corresponding to the first modulation and coding scheme is 2, and the code rate, corresponding to the 2 symbols in the time domain length, of the data packet corresponding to the TBS may be, for example, 251/1024, that is, 1004/1024, which is 4 times the time domain length. For example, N is equal to 2, the time domain length of one transmission opportunity in the 2 transmission opportunities is 2 symbols, the time domain length of the other transmission opportunity is 6 symbols, and the data packet corresponding to the TBS is carried in 679/1024, that is, 679/768, where the time domain length is 6 symbols and the corresponding code rate may be, for example, 4/3 times.

Considering that there is a certain problem when the code rate is too large, for example, data loss or decoding failure, etc., the code rate is limited according to the threshold value of the code rate in the embodiment of the present application.

Further, taking the code rate threshold as the maximum code rate 772/1024 in table 3 as an example, for example 3, the code rate 1004/1024 corresponding to the data packet corresponding to the TBS, where the time domain length is 2 symbols, is greater than the code rate threshold 772/1024, so that the second modulation and coding scheme is determined; the data packet corresponding to the TBS is carried in a manner that a code rate 679/768 corresponding to a symbol with a time domain length of 6 is greater than a code rate threshold 772/1024, thereby determining a second modulation and coding scheme.

It can be understood that, when the code rate corresponding to the first transmission timing is less than or equal to the code rate threshold, the problem caused by the too large code rate corresponding to the first transmission timing carried by the data packet corresponding to the TBS may not be considered. Therefore, the modulation order corresponding to the modulation and coding scheme according to the first transmission timing may be equal to the modulation order corresponding to the first modulation and coding scheme.

Since the modulation order and the code rate are in inverse proportion to the same number of TBS and RE, the modulation order corresponding to the second modulation coding mode is higher than the modulation order corresponding to the first modulation coding mode, so that the code rate corresponding to the second modulation coding mode can be lower than the first code rate, and the problem caused by the overlarge code rate can be avoided.

It should be noted that, the present application may not be limited to the magnitude relationship between the code rate corresponding to the second modulation and coding scheme and the code rate threshold. Optionally, the code rate corresponding to the second modulation and coding scheme may be greater than a code rate threshold, or the code rate corresponding to the second modulation and coding scheme may be smaller than the code rate threshold, or the code rate corresponding to the second modulation and coding scheme may be equal to the code rate threshold.

For example, taking the code rate threshold as the maximum code rate 772/1024 in table 3, and the code rate corresponding to the second modulation and coding scheme is smaller than or equal to the code rate threshold, N is equal to 4, the time domain length of each of the 4 transmission opportunities is the same and is 2 symbols, and the modulation order corresponding to the first modulation and coding scheme is 2, as shown in table 4 below, the modulation order may be adjusted from 2 (the modulation order corresponding to the first modulation and coding scheme is 2) to 4 (that is, the modulation order corresponding to the second modulation and coding scheme is 4), so that the terminal device adjusts the code rate from 1004/1024 to 526/1024,526/1024 which is smaller than the code rate threshold 772/1024.

For example, taking the code rate threshold as the maximum code rate 772/1024 in table 3 and the code rate corresponding to the second modulation and coding scheme is smaller than or equal to the code rate threshold as an example, for N being equal to 2, the time domain length of one transmission opportunity in 2 transmission opportunities is 2 symbols and the time domain length of the other transmission opportunity is 6 symbols, as shown in table 4 below, the modulation order may be adjusted from 2 to 4, and thus, the terminal device may adjust the code rate from 679/768 to 679/1536,679/1536 smaller than the code rate threshold 772/1024.

TABLE 4

Based on table 4, when the time domain length of each of the N transmission occasions is equal, and the code rate is smaller than the code rate threshold 772/1024, the relationship between N and the adjustment manner may be as follows:

1) when N is 2, the modulation order is adjusted from 2 to 4 (for example, the modulation scheme may be adjusted from QPSK to 16 QAM). Optionally, because the change of the modulation order has a large influence on transmission reliability, if the modulation scheme is adjusted from QPSK to 16QAM and the modulation scheme is adjusted from QPSK to 64QAM, and the code rate does not exceed the first code rate threshold, and the TBS remains unchanged, the minimum change to the modulation scheme is taken.

2) When N is 4 and MCS index corresponding to the first modulation and coding scheme is 9, and when 10, the modulation scheme is adjusted from QPSK to 16 QAM. When the MCS index corresponding to the first modulation and coding scheme is 11-13, the modulation scheme is adjusted from QPSK to 64 QAM. When the MCS index indicated by the base station is 11-13, the modulation mode is adjusted from QPSK to 16QAM, and the two conditions that the code rate does not exceed the code rate threshold and the TBS is kept unchanged cannot be simultaneously met. When the MCSindex corresponding to the first modulation and coding scheme exceeds 13, the two conditions that the code rate does not exceed the code rate threshold and the TBS remains unchanged cannot be satisfied at the same time no matter how the modulation scheme is adjusted.

3) When N is 8 and MCS index corresponding to the first modulation and coding scheme is 5, 6 and 7, the modulation scheme is adjusted from QPSK to 16 QAM. When the MCS index corresponding to the first modulation and coding scheme is 8 and 9, the modulation scheme is adjusted from QPSK to 64 QAM. When the MCS index corresponding to the first modulation and coding scheme exceeds 9, the two conditions that the code rate does not exceed the code rate threshold and the TBS remains unchanged cannot be satisfied at the same time no matter how the modulation scheme is adjusted.

It should be noted that, the specific manner of obtaining the code rate threshold by the sending device may not be limited in this application. Optionally, the code rate threshold is obtained by dynamic indication, predefined or preconfigured, for example, may be indicated by higher layer parameter configuration, or dynamically indicated by DCI, or may also be the maximum value 772/1024 in table 3 above.

Step 303, the terminal device sends the data packet at least one transmission time of the N transmission times according to the TBS and the second modulation and coding scheme.

In this step, the at least one transmission opportunity may be the N transmission opportunities, or may be a part of the N transmission opportunities.

The data packet transmitted at each of the at least one transmission opportunity may be understood as a data packet obtained based on the same information bits, the TBS, and the second modulation and coding scheme. Optionally, the content of the data packet sent by each transmission opportunity in the at least one transmission opportunity may be the same, or the content of the data packet sent by each transmission opportunity in the at least one transmission opportunity may be different, or the content of the data packet sent by each transmission opportunity in the at least one transmission opportunity may be partially the same.

It can be understood that, when the terminal device sends the data packet at least one transmission opportunity of the N transmission opportunities according to the TBS and the second modulation and coding scheme, the modulation orders of each transmission opportunity in the at least one transmission opportunity are the same and are modulation orders corresponding to the second modulation and coding scheme, and the code rate of each transmission opportunity in the at least one transmission opportunity can be flexibly determined according to actual transmission requirements.

In scenario 1, optionally, the at least one transmission opportunity is a transmission opportunity for sending the data packet in the N transmission opportunities, that is, modulation and coding modes according to which the transmission opportunity for sending the data packet in the N transmission opportunities is a second modulation and coding mode.

When the time domain length of each transmission opportunity in the N transmission opportunities is equal, the code rates, which are borne by the data packets corresponding to the TBS at any one of the N transmission opportunities, are all equal. Thus, further optionally, for ease of calculation, the first transmission opportunity may be a first transmission opportunity of the N transmission opportunities.

When the time domain length of each transmission opportunity in the N transmission opportunities is not equal, the code rates corresponding to the data packets borne by the TBS at any transmission opportunity in the N transmission opportunities are not equal. When the time domain lengths of some of the N transmission occasions are equal, the code rates corresponding to the transmission occasions with the equal time domain lengths among the N transmission occasions, which are borne by the data packets corresponding to the TBS, are equal, but the code rates corresponding to the transmission occasions with the unequal time domain lengths among the N transmission occasions, which are borne by the data packets corresponding to the TBS, are unequal. Therefore, for scenario 1, when the time domain lengths of each of the N transmission occasions are not equal, or the time domain lengths of some of the N transmission occasions are equal, one transmission occasion may be selected as the first transmission occasion. Further optionally, the first transmission opportunity is a transmission opportunity with the longest time domain length among the N transmission opportunities; or, the first transmission opportunity is a transmission opportunity with the shortest time domain length among the N transmission opportunities.

When the first transmission time is the transmission time with the longest time domain length among the N transmission times, for other transmission times in which the time domain length among the N transmission times is smaller than the first transmission time, there still exists a case in which the code rate corresponding to any one of the other transmission times, to which the data packet corresponding to the TBS is carried, is greater than the code rate threshold. Therefore, when other transmission occasions are also transmitted according to the second modulation and coding scheme, the code rate is too large, and for example, a part of information bits are lost. However, since the transmission is repeated a plurality of times, the first transmission can transmit all the information bits. The advantage of this is that the terminal equipment can select the minimum combination of code rate and modulation mode during adjustment to transmit the most redundant information, thereby improving the reliability of transmission.

When the first transmission time is the transmission time with the shortest time domain length among the N transmission times, for other transmission times in which the time domain length among the N transmission times is greater than the first transmission time, after the transmission of the information bits corresponding to the TBS is completed, there is no data on the remaining resources. Zero padding may be used on the remaining resources, or redundant bits may be added. This has the advantage that the terminal device can send all information bits at every transmission opportunity, and the network device can obtain the maximum combining gain during decoding.

Alternatively, when the time domain lengths of each of the N transmission occasions are not equal, the following scenario 2 may also be corresponded to.

In scenario 2, optionally, the at least one transmission opportunity is the first transmission opportunity, that is, a modulation and coding scheme according to which the transmission opportunity of the data packet is sent in the first transmission opportunity is a second modulation and coding scheme, and modulation and coding schemes according to other transmission opportunities except the first transmission opportunity in the N transmission opportunities are not the second modulation and coding scheme.

Further optionally, the modulation orders according to the other transmission occasions except for the first transmission occasion in the N transmission occasions may not be adjusted. That is, the code rates of the data packets corresponding to the TBS and corresponding to the other transmission occasions may not be changed. Specifically, the code rate (which may be referred to as code rate 1 hereinafter) corresponding to the transmission time borne by the data packet corresponding to the TBS may be determined according to the modulation order corresponding to the first modulation and coding scheme, the TBS, and the RE of one of the other transmission times, and the data packet may be sent at the transmission time according to the modulation order corresponding to the first modulation and coding scheme, the code rate 1, and the TBS.

Or, optionally, a modulation order according to which a second transmission opportunity in the N transmission opportunities is modulated, where the second transmission opportunity is different from the first transmission opportunity. Further optionally, the method of this embodiment may further include the following step a and step B.

Step a, the data packet corresponding to the TBS is carried at a code rate corresponding to a second transmission opportunity among the N transmission opportunities, and when the code rate is greater than the code rate threshold, the terminal device determines a third modulation and coding scheme.

The modulation order corresponding to the third modulation coding mode is higher than the modulation order corresponding to the first modulation coding mode; similar to the first transmission timing, for a certain modulation and coding scheme, the size of the data packet transmitted at the second transmission timing reaches the TBS by adjusting the code rate corresponding to the modulation and coding scheme, instead of adjusting the modulation order corresponding to the modulation and coding scheme. Moreover, since the size of the data packet transmitted at the second transmission opportunity is the TBS, the TBS is determined according to the REs included in the N transmission opportunities for carrying data information, and the number of the REs included in the N transmission opportunities for carrying data information is greater than the number of the REs included in the second transmission opportunity for carrying data information, a code rate (hereinafter, referred to as a second code rate) corresponding to the second transmission opportunity carried by the data packet corresponding to the TBS may be greater than a code rate corresponding to the first modulation and coding scheme. It should be noted that the second code rate is determined according to the modulation order corresponding to the first modulation and coding scheme, the TBS, and the RE of the second transmission opportunity.

Since the modulation order and the code rate are in inverse proportion to the same number of TBS and REs, the modulation order corresponding to the third modulation coding mode is higher than the modulation order corresponding to the first modulation coding mode, so that the code rate corresponding to the third modulation coding mode can be lower than the second code rate, and the problem caused by the overlarge code rate can be avoided.

It can be understood that, when the code rate corresponding to the second transmission time carried by the data packet corresponding to the TBS is less than or equal to the code rate threshold, a problem caused by an excessively large code rate carried by the data packet corresponding to the TBS at the second transmission time may not be considered. Therefore, the modulation order corresponding to the modulation and coding scheme according to the second transmission opportunity may be equal to the modulation order corresponding to the first modulation and coding scheme.

It should be noted that, the present application may not be limited to the magnitude relationship between the code rate corresponding to the third modulation and coding scheme and the code rate threshold. Optionally, the code rate corresponding to the third modulation and coding scheme may be greater than a code rate threshold, or the code rate corresponding to the third modulation and coding scheme may be smaller than the code rate threshold, or the code rate corresponding to the third modulation and coding scheme may be equal to the code rate threshold.

And step B, the terminal equipment sends the data packet at the second transmission opportunity according to the TBS and the third modulation and coding mode.

Optionally, the second transmission opportunity may traverse the other transmission opportunities except the first transmission opportunity in the N transmission opportunities, that is, the step a and the step B may be performed for each of the other transmission opportunities except the first transmission opportunity in the N transmission opportunities (that is, the modulation order is adjusted separately), or the second transmission opportunity may be a part of the transmission opportunities except the first transmission opportunity in the N transmission opportunities, which is not limited in this application.

Alternatively, when the time domain lengths of some of the N transmission occasions are equal, the method may further correspond to the following scenario 3.

Optionally, in scenario 3, the at least one transmission opportunity is the first transmission opportunity and a transmission opportunity with a time domain length equal to that of the first transmission opportunity, that is, a modulation and coding scheme according to which the transmission opportunity of the data packet is sent in the first transmission opportunity and the transmission opportunity with the time domain length equal to that of the first transmission opportunity is a second modulation and coding scheme, and in the N transmission opportunities, the modulation and coding scheme according to which the transmission opportunities other than the first transmission opportunity and the transmission opportunity with the time domain length equal to that of the first transmission opportunity are not the second modulation and coding scheme.

Further optionally, the modulation order according to which other transmission occasions of the N transmission occasions except the first transmission occasion and the transmission occasion with the time domain length equal to that of the first transmission occasion may not be adjusted. That is, the code rates of the data packets corresponding to the TBS and corresponding to the other transmission occasions may not be changed. Specifically, the code rate (which may be referred to as code rate 1 hereinafter) corresponding to the transmission time borne by the data packet corresponding to the TBS may be determined according to the modulation order corresponding to the first modulation and coding scheme, the TBS, and the RE of one of the other transmission times, and the data packet may be sent at the transmission time according to the modulation order corresponding to the first modulation and coding scheme, the code rate 1, and the TBS.

Or, optionally, a modulation order according to which a second transmission opportunity in the N transmission opportunities is modulated, where a time domain length of the second transmission opportunity is different from a time domain length of the first transmission opportunity. Further optionally, the method of this embodiment may further include the following step C and step D.

And step C, when the data packet corresponding to the TBS is borne on a code rate corresponding to a second transmission opportunity in the N transmission opportunities and is greater than the code rate threshold, the terminal equipment determines a third modulation coding mode.

It should be noted that step C is similar to step a, and is not described herein again.

And step D, the terminal equipment sends the data packet at the second transmission opportunity according to the TBS and the third modulation and coding mode.

It should be noted that step D is similar to step B, and is not described herein again.

Step 304, the network device determines the TBS of the data packet according to the resource elements RE for carrying data information and the first modulation and coding scheme included in the N transmission occasions.

In this step, since the data volume sent by the terminal device and the data volume received by the network device need to be aligned and understood, the network device also needs to determine the TBS.

It should be noted that step 304 is different from step 301 mainly in that step 301 is executed by the terminal device, and step 304 is executed by the network device, which has similar implementation principle and technical effect, and is not described herein again.

It should be noted that there is no restriction on the order between step 304 and steps 301 to 303.

Step 305, the network device receives the data packet corresponding to the TBS sent by the terminal device in at least one transmission opportunity of the N transmission opportunities by using a second modulation and coding scheme.

In this step, a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, and the second modulation and coding scheme is determined when a code rate corresponding to the data packet corresponding to the TBS is borne on the first transmission occasion and is greater than a code rate threshold.

And the network device receives, according to the TSB, the data packet corresponding to the TBS sent by the terminal device in the step 303 at the at least one transmission opportunity in the second modulation and coding scheme.

It should be noted that, in this step, for specific contents of the first transmission timing and the second modulation and coding scheme, reference may be made to relevant descriptions in step 302 and step 303, which are not described herein again.

Optionally, corresponding to the terminal device, the method of this embodiment may further include the following steps:

and the network equipment receives the data packet corresponding to the TBS sent by the terminal equipment in a third modulation coding mode at a second transmission time in the N transmission times.

It should be noted that, in this step, for specific contents of the second transmission opportunity and the third modulation and coding scheme, reference may be made to relevant description in step 303, and details are not repeated here.

Optionally, after step 305, the network device may decode the data packet received in step 305 according to the TBS determined in step 304.

It should be noted that there is no restriction on the order between step 305 and step 304.

In this embodiment, the terminal device determines the TBS of the data packet according to the RE for carrying data information and the first modulation and coding scheme included in the N transmission occasions, where the data packet corresponding to the TBS is carried in the code rate corresponding to the first transmission occasion, and when the code rate is greater than a threshold, the terminal device determines the second modulation and coding scheme whose modulation order is smaller than the first modulation and coding scheme, and sends the data packet at least one transmission occasion of the N transmission occasions according to the TBS and the second modulation and coding scheme.

It should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the terminal device, the network device, and the interaction between the terminal device and the network device. It is understood that, for each network element, for example, the terminal device and the network device, to implement each function in the method provided in the foregoing embodiments of the present application, the terminal device and the network device include a hardware structure and/or a software module corresponding to executing each function. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal device and the network device may be divided into the functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

The transmitting and receiving method according to the embodiment of the present application is described in detail above with reference to fig. 1 to 4, and the transmitting and receiving apparatus according to the embodiment of the present application is described in detail below with reference to fig. 5 to 8.

Fig. 5 is a schematic structural diagram of a transmitting apparatus 500 according to an embodiment of the present application, in a case where each functional module is divided according to each function. The sending apparatus is a terminal device or a sending apparatus supporting the terminal device to implement the method provided in the embodiment, for example, the sending apparatus may be a chip system. The apparatus 500 comprises: a processing module 510 and a sending module 520.

In a possible implementation manner, the processing module 510 is configured to determine a transport block size TBS of a data packet according to resource elements RE used for carrying data information and included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once; the processing module 510 is further configured to determine a second modulation and coding scheme when a first code rate is greater than a code rate threshold, where the first code rate is a code rate corresponding to the first transmission time of the N transmission times that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme; the sending module 520 is configured to send the data packet at least one transmission time of the N transmission times according to the TBS determined by the processing module 510 and the second modulation and coding scheme.

Illustratively, the time domain length of each of the N transmission occasions is equal.

Illustratively, the time domain length of each of the N transmission occasions is unequal.

Illustratively, the at least one transmission opportunity is the first transmission opportunity.

Illustratively, the time domain lengths of some of the N transmission occasions are equal.

Illustratively, the at least one transmission opportunity is the first transmission opportunity and a transmission opportunity equal to a time domain length of the first transmission opportunity.

In a possible implementation, the processing module 510 is further configured to determine a third modulation and coding scheme when a second code rate is greater than the code rate threshold, where the second code rate is a code rate corresponding to a second transmission opportunity, of the N transmission opportunities, that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme; the sending module 520 is further configured to send the data packet at the second transmission time according to the TBS and the third modulation and coding scheme; the first transmission timing is different from the second transmission timing.

Illustratively, the at least one transmission opportunity is a transmission opportunity of the N transmission opportunities for transmitting the data packet.

Illustratively, the first transmission opportunity is a transmission opportunity with the longest time domain length among the N transmission opportunities.

Illustratively, the first transmission opportunity is a transmission opportunity with the shortest time domain length among the N transmission opportunities.

Illustratively, the code rate threshold is dynamically indicated, predefined, or preconfigured.

It should be understood that in the apparatus 500, the physical device corresponding to the sending module is a sender, and the physical device corresponding to the processing module is a processor.

It should be appreciated that the apparatus 500 herein is embodied in the form of a functional unit. The term module herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, it may be understood by those skilled in the art that the apparatus 500 may be specifically a terminal device in the foregoing embodiment, and the apparatus 500 may be configured to execute each procedure and/or step corresponding to the terminal device in the foregoing method embodiment, and in order to avoid repetition, details are not described here again.

Fig. 6 is a schematic structural diagram of a receiving apparatus 600 provided in this embodiment of the present application, where each functional module is divided according to each function, and the receiving apparatus can execute steps executed by a network device in any method embodiment of the present application, as shown in fig. 6, the receiving apparatus is a network device or a receiving apparatus supporting the network device to implement the method provided in this embodiment, for example, the receiving apparatus may be a chip system. The apparatus 600 comprises: a processing module 610 and a receiving module 620.

In a possible implementation manner, the processing module 610 is configured to determine a transport block size TBS of a data packet according to resource elements RE used for carrying data information and included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once; the receiving module 620 is configured to receive the data packet corresponding to the TBS, where the data packet is sent by a terminal device in at least one transmission time of the N transmission times by using a second modulation and coding scheme, where a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the second modulation and coding scheme is determined when a first code rate of the terminal device is higher than a code rate threshold, and the first code rate is a code rate corresponding to the data packet corresponding to the TBS and borne by the first transmission time.

In a possible implementation, the receiving module 620 is further configured to receive the data packet corresponding to the TBS, where the data packet is sent by a terminal device in a second transmission opportunity of the N transmission opportunities by using a third modulation and coding scheme, where a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the third modulation and coding scheme is determined when a second code rate of the terminal device is higher than a code rate threshold, and the second code rate is a code rate that is borne by the data packet corresponding to the TBS and corresponds to the second transmission opportunity.

It should be understood that in the apparatus 600, the physical device corresponding to the processing module is a processor, and the physical device corresponding to the receiving module is a receiver.

It should be appreciated that the apparatus 600 herein is embodied in the form of a functional unit. The term module herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, it may be understood by those skilled in the art that the apparatus 600 may be embodied as the first network device in the foregoing embodiment, and the apparatus 600 may be configured to perform each procedure and/or step corresponding to the first network device in the foregoing method embodiment, which is not described herein again to avoid repetition.

The apparatus 500 and the apparatus 600 of the above-mentioned solutions have functions of implementing corresponding steps executed by the terminal device and the network device in the above-mentioned methods, respectively; the functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the transmitting module may be replaced by a transmitter, the receiving module may be replaced by a receiver, and other modules, such as a processing module, may be replaced by a processor, to perform the transceiving operations and the related processing operations in the respective method embodiments. That is, the receiving module may be a receiver, the transmitting module may be a transmitter, and the processing module may be a processor.

In the embodiments of the present application, the apparatuses in fig. 5 and fig. 6 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the receiving module and the transmitting module may be transceiver circuits of the chip, and are not limited herein.

Fig. 7 is a schematic structural diagram of a network device provided in the present application. The network device 700 shown in fig. 7 includes a transmitter/receiver 701, a controller/processor 702, and a memory 703.

The transmitter/receiver 701 is configured to support information transceiving between the network device and the terminal device in the above-described embodiment. The controller/processor 702 performs various functions for communicating with terminal devices. In the uplink, uplink signals from the terminal device are received via the antenna, demodulated by the receiver 701, and further processed by the controller/processor 702 to recover the traffic data and signaling information sent by the terminal device. On the downlink, traffic data and signaling messages are processed by a controller/processor 702 and conditioned by a transmitter 701 to generate a downlink signal, which is transmitted via an antenna to terminal devices. Controller/processor 702 may also perform processes for the above-described method embodiments involving network devices and/or other processes for the techniques described herein. The memory 703 is used to store program codes and data for the network device.

Illustratively, the controller/processor 702 is configured to: the method comprises the steps of determining a transport block size TBS of a data packet according to Resource Elements (RE) used for carrying data information and a first modulation and coding mode, wherein the resource elements are included in N transmission occasions, and N is an integer larger than 1; each of the N transmission occasions is used to transmit the data packet once. Transmitter/receiver 701: and the data packet corresponding to the TBS is sent by a second modulation and coding scheme, where the modulation order corresponding to the second modulation and coding scheme is higher than the modulation order corresponding to the first modulation and coding scheme, the second modulation and coding scheme is determined when a first code rate of the terminal device is higher than a code rate threshold, and the first code rate is a code rate corresponding to the first transmission opportunity borne by the data packet corresponding to the TBS.

Illustratively, the transmitter/receiver 701 is configured to: receiving a second transmission opportunity of the terminal equipment in the N transmission opportunities, and the data packet corresponding to the TBS sent by using a third modulation coding mode, where a modulation order corresponding to the third modulation coding mode is higher than a modulation order corresponding to the first modulation coding mode, the third modulation coding mode is determined when a second code rate of the terminal equipment is higher than a code rate threshold, and the second code rate is a code rate corresponding to the second transmission opportunity borne by the data packet corresponding to the TBS;

it should be understood that the network device 700 may be embodied as the network device in the above-described embodiments and may be used to perform each step and/or flow corresponding to the network device in the above-described method embodiments. The memory 703 may optionally include both read-only memory and random-access memory, and provides instructions and data to the controller/processor 702. A portion of the memory 703 may also include non-volatile random access memory. For example, the memory may also store device type information. The controller/processor 702 may be configured to execute instructions stored in the memory, and when the controller/processor 702 executes the instructions stored in the memory, the controller/processor 702 is configured to perform the various steps and/or processes of the above-described method embodiments corresponding to a network device.

Fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application, which may be a simplified schematic diagram of a possible design structure of the terminal device according to the foregoing embodiment. The terminal device 800 shown in fig. 8 includes a transmitter 801, a receiver 802, a controller/processor 803, a memory 804, and a modem processor 805.

Wherein the transmitter 801 is configured to transmit an uplink signal, which is transmitted to the network device in the above-mentioned embodiment via the antenna. On the downlink, the antenna receives a downlink signal (DCI) transmitted by the network device in the above-described embodiment. The receiver 802 is configured to receive a downlink signal (DCI) received from an antenna. In modem processor 805, an encoder 806 receives and processes traffic data and signaling messages to be sent on the uplink. A modulator 807 further processes (e.g., symbol maps and modulates) the coded traffic data and signaling messages and provides output samples. A demodulator 805 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 808 processes (e.g., decodes) the symbol estimates and provides decoded data and signaling messages that are sent to the terminal device. Encoder 806, modulator 807, decoder 808, and demodulator 809 may be implemented by a combined modem processor 605. These elements are processed according to the radio access technology employed by the radio access network.

The controller/processor 803 controls and manages the operation of the terminal device for executing the processing performed by the terminal device in the above-described method embodiment. Illustratively, the controller/processor 803 is configured to determine a transport block size TBS of a data packet according to resource elements RE for carrying data information and a first modulation and coding scheme, which are included in N transmission occasions, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once; the controller/processor 803 is further configured to determine a second modulation and coding scheme when a first code rate is greater than a code rate threshold, where the first code rate is a code rate corresponding to the first transmission time of the N transmission times, where the data packet corresponding to the TBS is carried by the data packet, and a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme; a transmitter 801, configured to transmit the data packet at least one transmission opportunity of the N transmission opportunities according to the TBS and the second modulation and coding scheme determined by the controller/processor 803.

It should be understood that the terminal device 800 may be embodied as the terminal device in the foregoing embodiment, and may be configured to execute each step and/or flow corresponding to the terminal device in the foregoing method embodiment. The memory 804 may optionally include both read-only memory and random-access memory, and provides instructions and data to the controller/processor 803. A portion of the memory 804 may also include non-volatile random access memory. For example, the memory may also store device type information. The controller/processor 803 may be configured to execute instructions stored in the memory, and when the controller/processor 803 executes instructions stored in the memory, the controller/processor 803 is configured to perform the various steps and/or procedures of the above-described method embodiments corresponding to a terminal device.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (e.g., a random-access memory (RAM)). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b and c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both, and that the steps and elements of the various embodiments have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A transmission method, comprising:

the terminal equipment determines a transport block size TBS of a data packet according to Resource Elements (RE) which are used for bearing data information and are included in N transmission occasions and a first modulation coding mode, wherein N is an integer larger than 1; each of the N transmission occasions is used to transmit the data packet once;

when a first code rate is greater than a code rate threshold, the terminal device determines a second modulation coding mode, where the first code rate is a code rate corresponding to a first transmission opportunity, among the N transmission opportunities, that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the second modulation coding mode is higher than a modulation order corresponding to the first modulation coding mode;

and the terminal equipment sends the data packet at least one transmission opportunity in the N transmission opportunities according to the TBS and the second modulation coding mode.

2. A receiving method, comprising:

the network equipment determines a transport block size TBS of a data packet according to Resource Elements (RE) which are used for bearing data information and are included in N transmission occasions and a first modulation coding mode, wherein N is an integer larger than 1; each of the N transmission occasions is used to transmit the data packet once;

and the network equipment receives the data packet corresponding to the TBS, which is sent by the terminal equipment in at least one transmission opportunity of the N transmission opportunities by adopting a second modulation coding mode, wherein a modulation order corresponding to the second modulation coding mode is higher than a modulation order corresponding to the first modulation coding mode, the second modulation coding mode is determined when a first code rate of the terminal equipment is higher than a code rate threshold value, and the first code rate is a code rate corresponding to the first transmission opportunity borne by the data packet corresponding to the TBS.

3. A transmitting apparatus, comprising:

a processing module, configured to determine a transport block size TBS of a data packet according to resource elements RE used for carrying data information and included in N transmission occasions and a first modulation and coding scheme, where N is an integer greater than 1; each of the N transmission occasions is used to transmit the data packet once;

the processing module is configured to determine a second modulation and coding scheme when a first code rate is greater than a code rate threshold, where the first code rate is a code rate corresponding to a first transmission time of the N transmission times, where the data packet corresponding to the TBS is carried by the data packet, and a modulation order corresponding to the second modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme;

a sending module, configured to send the data packet at least one transmission opportunity of the N transmission opportunities according to the TBS determined by the processing module and the second modulation and coding scheme.

4. A receiving apparatus, comprising:

5. The method of claim 1 or 2, or the apparatus of claim 3 or 4, wherein the time domain length of each of the N transmission occasions is equal.

6. The method of claim 1 or 2, or the apparatus of claim 3 or 4, wherein the time domain length of each of the N transmission occasions is unequal.

7. The method or apparatus of claim 6, wherein the at least one transmission opportunity is the first transmission opportunity.

8. The method of claim 1 or 2, or the apparatus of claim 3 or 4, wherein the time domain lengths of some of the N transmission occasions are equal.

9. The method or apparatus of claim 8, wherein the at least one transmission occasion is the first transmission occasion, and a transmission occasion equal to a time domain length of the first transmission occasion.

10. The method according to claim 7 or 9, characterized in that the method further comprises:

when the second code rate is greater than the code rate threshold, the terminal device determines a third modulation coding mode, where the second code rate is a code rate corresponding to a second transmission opportunity, of the N transmission opportunities, that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the third modulation coding mode is higher than a modulation order corresponding to the first modulation coding mode;

the terminal equipment sends the data packet at the second transmission opportunity according to the TBS and the third modulation and coding mode; the first transmission opportunity is different from the second transmission opportunity.

11. The method or apparatus of any of claims 1-4, 5-6, or 8, wherein the at least one transmission opportunity is a transmission opportunity of the N transmission opportunities for sending the data packet.

12. The method or apparatus of claim 6 or 8, wherein the first transmission opportunity is a transmission opportunity with a longest time domain length among the N transmission opportunities.

13. The method or apparatus of claim 6 or 8, wherein the first transmission opportunity is a transmission opportunity with a shortest time domain length among the N transmission opportunities.

14. The method or apparatus of any of claims 1-13, wherein the code rate threshold is dynamically indicated, predefined, or preconfigured.

15. The method according to claim 7 or 9, characterized in that the method further comprises:

the network device receives the data packet corresponding to the TBS sent by the terminal device in a second transmission time of the N transmission times by using a third modulation and coding scheme, where a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, the third modulation and coding scheme is determined when a second code rate of the terminal device is higher than the code rate threshold, and the second code rate is a code rate corresponding to the second transmission time borne by the data packet corresponding to the TBS; the first transmission timing is different from the second transmission timing.

16. The apparatus of claim 7 or 9, wherein the processing module is further configured to:

when a second code rate is greater than the code rate threshold, determining a third modulation coding mode, where the second code rate is a code rate corresponding to a second transmission opportunity, of the N transmission opportunities, that is borne by the data packet corresponding to the TBS, and a modulation order corresponding to the third modulation coding mode is higher than a modulation order corresponding to the first modulation coding mode;

the sending module is further configured to send the data packet to a network device at the second transmission opportunity according to the TBS and the third modulation and coding scheme; the first transmission timing is different from the second transmission timing.

17. The apparatus according to claim 7 or 9, wherein the receiving module is further configured to receive the data packet corresponding to the TBS, where the data packet is sent by a terminal device in a third modulation and coding scheme at a second transmission time of the N transmission times, where a modulation order corresponding to the third modulation and coding scheme is higher than a modulation order corresponding to the first modulation and coding scheme, where the third modulation and coding scheme is determined when a second code rate of the terminal device is higher than a code rate threshold, and the second code rate is a code rate that is carried by the data packet corresponding to the TBS and corresponds to the second transmission time; the first transmission timing is different from the second transmission timing.

18. A computer-readable storage medium, comprising: computer software instructions; the computer software instructions, when executed on a transmitting apparatus, cause the transmitting apparatus to perform the method of any one of claims 1, 5-14.

19. A computer-readable storage medium, comprising: computer software instructions; the computer software instructions, when executed on a receiving device, cause the receiving device to perform the method of any one of claims 2, 5-9, 11-15.

20. A computer program product, characterized in that it causes a computer to perform the method according to any one of claims 1, 5-14, when said computer program product is run on a transmitting device.

21. A computer program product, characterized in that it causes a computer to perform the method according to any one of claims 2, 5-9, 11-15, when the computer program product is run on a receiving device.