CN112449420A

CN112449420A - Data transmission method and device

Info

Publication number: CN112449420A
Application number: CN201910760309.3A
Authority: CN
Inventors: 温容慧; 余政; 张兴炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2021-03-05
Also published as: WO2021031939A1

Abstract

The application provides a data transmission method and a data transmission device, which are used for solving the problem of determining a frequency hopping transmission mode. The present application illustratively provides three possible schemes for indicating the frequency hopping transmission of data. In a first possible scheme, a set is determined from multiple sets of frequency hopping transmission modes through RRC signaling, and then, in combination with the number of repetitions of data transmission in a timeslot, which frequency hopping transmission mode is used to transmit data is determined. In a second possible scheme, a set is determined from multiple sets of frequency hopping transmission modes through RRC signaling, and then it is determined from the determined set which frequency hopping transmission mode is used to transmit data in combination with DCI. In a third possible scheme, a set is determined from multiple frequency hopping transmission mode sets through RRC signaling, a subset is determined from the determined set through DCI, and a selected frequency hopping transmission mode is determined according to the number of repetitions of data transmission in a time slot.

Description

Data transmission method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a data transmission method and device.

Background

To improve the reliability of data transmission, the fifth generation (5) is currently available^thgeneration, 5G) mobile communication system supports multiple repeated transmission of one data in a New Radio (NR) system and a new NR systemUnder the transmission scene, the NR system supports frequency hopping transmission modes, including intra-slot frequency hopping and inter-slot frequency hopping. Inter-slot frequency hopping refers to that different time slots adopt different frequency domain resources for data transmission. The frequency hopping in the time slot means that one time slot allows 2 different frequency hopping center frequency points. Currently, intra-slot hopping or inter-slot hopping is indicated by higher layer signaling. Whether or not frequency hopping is performed when data is transmitted is indicated by Downlink Control Information (DCI). Other frequency hopping transmission schemes are currently discussed, including inter-slot hopping and intra-slot hopping. On the basis of adding other frequency hopping transmission modes, how to determine which frequency hopping transmission mode is adopted does not have a feasible scheme at present.

Disclosure of Invention

The application provides a data transmission method and a data transmission device, which are used for solving the problem of determining a frequency hopping transmission mode.

In a first aspect, an embodiment of the present application provides a data transmission method, where the method may be applied to a terminal device or a chip in the terminal device, and the following description takes an example in which an execution subject is the terminal device. The method comprises the steps that terminal equipment receives first indication information from network equipment, the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one frequency hopping transmission mode set in N frequency hopping transmission mode sets, each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. Then the terminal device receives second indication information from the network device, wherein the second indication information indicates a first time-frequency resource used for transmitting the first data and the number of times of repeatedly transmitting the first data. Further, the terminal device determines a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the first time-frequency resource and the number of times of repeatedly transmitting the first data. Then, the terminal device receives the first data from the network device by using the first frequency hopping transmission mode, or sends the first data to the network device by using the first frequency hopping transmission mode. In the above manner, a set is determined from a plurality of frequency hopping transmission mode sets through the first indication information, and then which frequency hopping transmission mode is adopted to transmit data is determined by combining the first time-frequency resource for transmitting the first data and the number of times of repeatedly transmitting the first data, so that the terminal device and the network device can agree with the understanding of the frequency hopping transmission mode, and the data transmission can be smoothly performed.

In one possible design, the terminal device determines the first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the number of times the first data is transmitted in a first time unit, where the number of times the first data is transmitted in the first time unit is determined by the first time-frequency resource and the number of times the first data is repeatedly transmitted. Due to the fact that the frequency hopping transmission modes suitable for different transmission times of the first data in the first time unit are different, the frequency hopping transmission mode can be determined without adding extra signaling bits, and signaling overhead is saved.

In one possible design, the terminal device determines the first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the number of times the first data is transmitted in the first time unit and a first mapping relationship, where the first mapping relationship includes: when the number of times of transmission of the first data in the first time unit is 1, a corresponding frequency hopping transmission mode in a first frequency hopping transmission mode set; and when the number of times of transmission of the first data in the first time unit is greater than 1 time, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode set.

Illustratively, the first mapping relationship is predefined for a protocol or configured to the terminal device by the network device through signaling.

In one possible design, the first indication information is carried in radio resource control, RRC, signaling. By the design, the first indication information can reuse the signaling bit indicating the frequency hopping transmission mode in the current protocol without newly increasing signaling overhead, and the forward compatibility of the system can be ensured.

In one possible design, the second indication information is carried in downlink control information, DCI.

Based on the same inventive concept as the first aspect, in a second aspect, an embodiment of the present application provides a data transmission method, where the method may be applied to a network device or a chip in the network device, and the following description takes the implementation subject being the network device as an example. The method comprises the steps that network equipment sends first indication information to terminal equipment, the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one frequency hopping transmission mode set in N frequency hopping transmission mode sets, each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. And the network equipment sends second indication information to the terminal equipment, wherein the second indication information indicates the first time-frequency resource used for transmitting the first data and the times of repeatedly transmitting the first data. And the network equipment determines a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the first time-frequency resource and the times of repeatedly transmitting the first data. And the network equipment receives the first data from the terminal equipment by using the first frequency hopping transmission mode, or sends the first data to the terminal equipment by using the first frequency hopping transmission mode.

In one possible design, the network device determines a first frequency-hopping transmission mode from the first set of frequency-hopping transmission modes according to the number of times the first data is transmitted in a first time unit, where the number of times the first data is transmitted in the first time unit is determined by the first time-frequency resource and the number of times the first data is repeatedly transmitted.

In one possible design, the network device determines the first frequency-hopping transmission mode from the first frequency-hopping transmission mode set according to the number of times the first data is transmitted in the first time unit and a first mapping relationship, where the first mapping relationship includes: when the number of times of transmission of the first data in the first time unit is 1, a corresponding frequency hopping transmission mode in a first frequency hopping transmission mode set; and when the number of times of transmission of the first data in the first time unit is greater than 1 time, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode set.

In one possible design, the first indication information is carried in radio resource control, RRC, signaling. In one possible design, the second indication information is carried in downlink control information, DCI.

For the description of the beneficial effects of the second aspect, reference may be made to the description of the first aspect, and details are not repeated here.

In a third aspect, an embodiment of the present application provides a data transmission method, where the method may be applied to a terminal device or a chip in the terminal device, and the following description takes an example in which an execution subject is the terminal device. The method comprises the steps that terminal equipment receives first indication information from network equipment, the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one frequency hopping transmission mode set in N frequency hopping transmission mode sets, each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. And the terminal equipment receives third indication information from the network equipment, wherein the third indication information indicates the first frequency hopping transmission mode in the first frequency hopping transmission mode set. And the terminal equipment receives first data from the network equipment by using the first frequency hopping transmission mode, or sends the first data to the network equipment by using the first frequency hopping transmission mode. According to the design, one frequency hopping transmission mode set is determined from a plurality of frequency hopping transmission modes through the first indication information, and then one frequency hopping transmission mode is determined from the frequency hopping transmission mode set through the third indication information to transmit data, so that the terminal equipment and the network equipment can agree with the understanding of the frequency hopping transmission modes, and the data transmission can be smoothly carried out.

In one possible design, the first frequency hopping transmission mode is one of the following: a non-frequency hopping transmission mode, an intra-slot frequency hopping, an inter-repeat frequency hopping, an intra-repeat frequency hopping, a mixed frequency hopping mode of the inter-slot frequency hopping and the inter-repeat frequency hopping, a mixed frequency hopping mode of the inter-slot frequency hopping and the intra-repeat frequency hopping, a mixed frequency hopping mode of the intra-slot frequency hopping and the inter-repeat frequency hopping, and a mixed frequency hopping mode of the intra-slot frequency hopping and the intra-repeat frequency hopping.

In one possible design, the third indication information is carried in downlink control information, DCI.

In one possible design, the bit length of the third indication information is 1 bit or 2 bits.

Based on the same inventive concept as the third aspect, in a fourth aspect, the present application provides a data transmission method, where the method is applicable to a network device or a chip in the network device, and the following description takes the example that an execution subject is the network device. The method comprises the steps that network equipment sends first indication information to terminal equipment, the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one frequency hopping transmission mode set in N frequency hopping transmission mode sets, each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. And the network equipment sends third indication information to the terminal equipment, wherein the third indication information indicates the first frequency hopping transmission mode in the first frequency hopping transmission mode set. And the network equipment receives first data from the terminal equipment by using the first frequency hopping transmission mode, or sends the first data to the terminal equipment by using the first frequency hopping transmission mode.

In one possible design, the first indication information is carried in radio resource control, RRC, signaling.

For the description of the advantageous effects of the fourth aspect, reference may be made to the description of the third aspect, and details are not repeated here.

In a fifth aspect, an embodiment of the present application provides a data transmission method, where the method is applicable to a terminal device or a chip in the terminal device, and the following description takes the implementation subject being the terminal device as an example. The method comprises the steps that terminal equipment receives first indication information from network equipment, the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one frequency hopping transmission mode set in N frequency hopping transmission mode sets, each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. The terminal device receives fourth indication information from the network device, where the fourth indication information indicates a first frequency hopping transmission mode subset in the first frequency hopping transmission mode set, the first frequency hopping transmission mode subset is one of M frequency hopping transmission mode subsets included in the first frequency hopping transmission mode set, each of the M frequency hopping transmission mode subsets includes at least one frequency hopping transmission mode, and M is an integer greater than 1. And the terminal equipment receives second indication information from the network equipment, wherein the second indication information indicates the first time-frequency resource used for transmitting the first data and the times of repeatedly transmitting the first data. And the terminal equipment determines a first frequency hopping transmission mode from the first frequency hopping transmission mode subset according to the first time-frequency resource and the times of repeatedly transmitting the first data. And the terminal equipment receives the first data from the network equipment by using the first frequency hopping transmission mode, or sends the first data to the network equipment by using the first frequency hopping transmission mode.

Through the design, the frequency hopping transmission mode set is selected through the first indication information, a subset is selected from the frequency hopping transmission mode set through the fourth indication information, and then a specific frequency hopping transmission mode is determined by combining the first time-frequency resource and the number of times of repeatedly transmitting the first data, so that the understanding of the frequency hopping transmission mode is consistent between the terminal equipment and the network equipment, and the data transmission is smoothly carried out.

In one possible design, the terminal device determines a first frequency hopping transmission mode from the first subset of frequency hopping transmission modes according to the number of times the first data is transmitted in a first time unit, where the number of times the first data is transmitted in the first time unit is determined by the first time-frequency resource and the number of times the first data is repeatedly transmitted.

In one possible design, the terminal device determines the first hopping transmission mode from the first hopping transmission mode subset according to the number of times the first data is transmitted in the first time unit and a second mapping relationship, where the second mapping relationship includes: when the number of times of transmission of the first data in the first time unit is 1, a corresponding frequency hopping transmission mode in the first frequency hopping transmission mode subset; and when the number of times of transmission of the first data in the first time unit is greater than 1 time, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode subset.

In one possible design, the fourth indication information is carried in downlink control information DCI.

In one possible design, the bit length of the fourth indication information is 1 bit.

Based on the same inventive concept as the fifth aspect, in a sixth aspect, the present application provides a data transmission method, where the method is applicable to a network device or a chip in the network device, and the following description takes the example that an execution subject is the network device as an example. The method comprises the steps that network equipment sends first indication information to terminal equipment, the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one frequency hopping transmission mode set in N frequency hopping transmission mode sets, each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. The network device sends fourth indication information to the terminal device, where the fourth indication information indicates a first frequency hopping transmission mode subset in the first frequency hopping transmission mode set, the first frequency hopping transmission mode subset is one of M frequency hopping transmission mode subsets included in the first frequency hopping transmission mode set, each of the M frequency hopping transmission mode subsets includes at least one frequency hopping transmission mode, and M is an integer greater than 1. And the network equipment sends second indication information to the terminal equipment, wherein the second indication information indicates time-frequency resources used for transmitting the first data and the times of repeatedly transmitting the first data. And the network equipment determines a first frequency hopping transmission mode from the first frequency hopping transmission mode subset according to the first time-frequency resource and the times of repeatedly transmitting the first data. And the network equipment receives the first data from the terminal equipment by using the first frequency hopping transmission mode, or sends the first data to the terminal equipment by using the first frequency hopping transmission mode.

In one possible design, the network device determines a first frequency-hopping transmission mode from the first subset of frequency-hopping transmission modes according to the number of times the first data is transmitted in a first time unit, where the number of times the first data is transmitted in the first time unit is determined by the first time-frequency resource and the number of times the first data is repeatedly transmitted.

In one possible design, the network device determines the first hopping transmission mode from the first subset of hopping transmission modes according to the number of times the first data is transmitted in the first time unit and a second mapping relationship, where the second mapping relationship includes: when the number of times of transmission of the first data in the first time unit is 1, a corresponding frequency hopping transmission mode in the first frequency hopping transmission mode subset; and when the number of times of transmission of the first data in the first time unit is greater than 1 time, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode subset.

For describing the advantageous effects of the sixth aspect, reference may be made to the description of the fifth aspect, and details thereof are not repeated here.

In a seventh aspect, the present application provides a communication apparatus, configured for a terminal device or a chip of a terminal device, including means or means (means) for performing the method in the foregoing first aspect or any possible implementation manner of the first aspect, or including means or means for performing the method in the foregoing third aspect or any possible implementation manner of the third aspect, or including means or means for performing the method in any possible implementation manner of the foregoing fifth aspect or fifth aspect.

In an eighth aspect, the present application provides a communication apparatus, for a network device or a chip of a network device, comprising means or means for performing the method in any possible implementation manner of the second aspect or the second aspect, or comprising means or means for performing the method in any possible implementation manner of the fourth aspect or the fourth aspect, or comprising means or means for performing the method in any possible implementation manner of the sixth aspect or the sixth aspect.

In a ninth aspect, the present application provides a communication apparatus, configured for a terminal device or a chip of a terminal device, and including at least one processing element and at least one storage element, where the at least one storage element is configured to store a program and data, and the at least one processing element is configured to perform the method in the foregoing first aspect or any possible implementation manner of the first aspect, or is configured to perform the method in the foregoing third aspect or any possible implementation manner of the third aspect, or is configured to perform the method in any possible implementation manner of the foregoing fifth aspect or fifth aspect.

In a tenth aspect, the present application provides a communication apparatus for a network device or a chip of a network device, comprising at least one processing element and at least one memory element, wherein the at least one memory element is configured to store a program and data, and the at least one processing element is configured to perform the method in any possible implementation manner of the foregoing second aspect or second aspect, or to perform the method in any possible implementation manner of the foregoing fourth aspect or fourth aspect, or to perform the method in any possible implementation manner of the foregoing sixth aspect or sixth aspect.

In an eleventh aspect, the present application provides a communication device, including a processor and an interface circuit, where the interface circuit is configured to receive and transmit a signal from a communication device other than the communication device to the processor or send a signal from the processor to the communication device other than the communication device, and the processor is configured to implement, through a logic circuit or execute code instructions, the method in the foregoing first aspect or any possible implementation manner of the first aspect, or the method in any possible implementation manner of the foregoing third aspect or third aspect, or the method in any possible implementation manner of the foregoing fifth aspect or fifth aspect.

In a twelfth aspect, the present application provides a communication device, including a processor and an interface circuit, where the interface circuit is configured to receive a signal from another communication device other than the communication device and transmit the signal to the processor or send the signal from the processor to another communication device other than the communication device, and the processor is configured to implement, through a logic circuit or execute code instructions, the method in any possible implementation manner of the foregoing second aspect or second aspect, or the method in any possible implementation manner of the foregoing fourth aspect or fourth aspect, and the method in any possible implementation manner of the foregoing sixth aspect or sixth aspect.

In a thirteenth aspect, the present application provides a computer program product comprising computer instructions that, when executed, cause a method in the aforementioned first aspect or any possible implementation of the first aspect to be performed, or cause a method in the aforementioned second aspect or any possible implementation of the second aspect to be performed, or cause a method in the aforementioned third aspect or any possible implementation of the third aspect to be performed, or cause a method in the aforementioned fourth aspect or any possible implementation of the fourth aspect to be performed, or cause a method in the aforementioned fifth aspect or any possible implementation of the fifth aspect to be performed, or cause a method in the aforementioned sixth aspect or any possible implementation of the sixth aspect to be performed.

In a fourteenth aspect, the present application provides a computer-readable storage medium storing computer instructions that, when executed, cause a method in the foregoing first aspect or any possible implementation manner of the first aspect to be performed, or cause a method in the foregoing second aspect or any possible implementation manner of the second aspect to be performed, or cause a method in the foregoing third aspect or any possible implementation manner of the third aspect to be performed, or cause a method in the foregoing fourth aspect or any possible implementation manner of the fourth aspect to be performed, or cause a method in the foregoing fifth aspect or any possible implementation manner of the fifth aspect to be performed, or cause a method in the foregoing sixth aspect or any possible implementation manner of the sixth aspect to be performed.

Drawings

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

FIG. 2 is a schematic diagram of frequency hopping according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a possible inter-slot frequency hopping according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a possible intra-timeslot frequency hopping according to an embodiment of the present application;

FIG. 5 is a schematic diagram of one possible inter-repetition frequency hopping in an embodiment of the present application;

FIG. 6 is a schematic diagram of a possible repeated inner frequency hopping in an embodiment of the present application;

FIG. 7 is a diagram illustrating data transmission according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a possible intra-timeslot frequency hopping according to an embodiment of the present application;

fig. 9 is a schematic diagram of frequency hopping within a possible timeslot in a multistrep spot scene according to an embodiment of the present application;

fig. 10 is a schematic diagram of another possible intra-slot frequency hopping in a multistep spot scene according to an embodiment of the present application;

fig. 11 is a schematic diagram of a possible repeated internal frequency hopping in a multistep pilot slot scene according to an embodiment of the present application;

fig. 12 is a schematic diagram of possible inter-slot frequency hopping in an OneRepPerSlot scene according to an embodiment of the present application;

fig. 13 is a schematic diagram of possible inter-repetition frequency hopping in a multistrepspot scene according to an embodiment of the present application;

fig. 14 is a schematic diagram of inter-slot frequency hopping in a multistep spot scene according to an embodiment of the present application;

FIG. 15 is a diagram illustrating another example of data transmission in accordance with the present application;

FIG. 16 is a schematic diagram illustrating a hybrid frequency hopping scheme according to an embodiment of the present application;

FIG. 17 is a diagram illustrating yet another example of data transmission in the embodiment of the present application;

fig. 18 is a diagram illustrating a communication device 1800 according to an embodiment of the present application;

fig. 19 is a diagram of a communication device 1900 according to an embodiment of the present application;

FIG. 20 is a diagram of a network device in an embodiment of the present application;

fig. 21 is a schematic diagram of a terminal device in the embodiment of the present application.

Detailed Description

Fig. 1 is an architecture diagram of a mobile communication system to which an embodiment of the present application is applied. As shown in fig. 1, the mobile communication system includes a core network device 110, an access network device 120, and at least one terminal device (e.g., a terminal device 130 and a terminal device 140 in fig. 1). The terminal equipment is connected with the access network equipment in a wireless mode, and the access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the access network device may be separate physical devices, or the function of the core network device and the logical function of the 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 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, access network devices, and terminal devices included in the mobile communication system.

The access network device is an access device that the terminal device accesses to the mobile communication system in a wireless manner, and may be a base station (base station), an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, and the like; or may be a module or a unit that performs part of the functions of the base station, for example, a Centralized Unit (CU) or a Distributed Unit (DU). The embodiment of the present application does not limit the specific technology and the specific device form adopted by the access network device. In this application, an access network device is referred to as a network device for short, and if no special description is provided, the network devices are all referred to as access network devices.

A terminal device may also be referred to as a terminal, User Equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote operation, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

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

The network device and the terminal device can communicate through the authorized spectrum, can communicate through the unlicensed spectrum, and can communicate through both the authorized spectrum and the unlicensed spectrum. The network device and the terminal device may communicate with each other through a frequency spectrum of 6 gigahertz (GHz) or less, through a frequency spectrum of 6GHz or more, or through both a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

The embodiments of the present application may be applied to a 5G mobile communication system or a future mobile communication system. The International Telecommunications Union (ITU) defines three major application scenarios for 5G and future Mobile communication systems, which are enhanced Mobile Broadband (eMBB), Ultra Reliable and Low Latency Communications (URLLC), and massive machine type communications (mtc), respectively. It should be understood that the system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and a person having ordinary skill in the art can understand that, with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Technical terms referred to in the embodiments of the present application are explained below.

1) The first time unit may be a slot (slot) or a part of a slot, a subframe or a part of a subframe, a radio frame or a part of a radio frame, and the like. In the embodiment of the present application, the first time unit is taken as an example to be explained. For uplink transmission, a part of a timeslot may refer to a symbol (symbol) for uplink transmission in a timeslot, for example, a symbol starting from an uplink/downlink transition point to a timeslot boundary, or a symbol starting from an uplink/downlink transition point to a next uplink/downlink transition point for uplink transmission. For downlink transmission, a part of a timeslot may be a symbol for downlink transmission starting from a timeslot boundary to an uplink/downlink transition point, or a symbol for downlink transmission starting from an uplink/downlink transition point to a timeslot boundary, or a symbol for downlink transmission starting from an uplink/downlink transition point to a next uplink/downlink transition point. In this application, if not specifically stated, the symbols all refer to time domain symbols, and the time domain symbols may be Orthogonal Frequency Division Multiplexing (OFDM) symbols or Discrete Fourier Transform spread-spectrum-OFDM (DFT-s-OFDM) symbols.

2) Mini-slots (mini-slots), which are a concept newly introduced in NR systems, refer to one or more symbols having a time domain resource smaller than one slot. And if the time domain length used by the data transmission of 1 time scheduled by the network equipment is less than one slot, the data transmission is called mini-slot-based data transmission. Mini-slot based data transmission is generally applied to transmit traffic data of URLLC.

3) Frequency hopping (frequency hopping).

Frequency hopping refers to a communication method in which both the receiving end and the transmitting end change frequency domain resources used in the information transmission process according to a predetermined rule, so as to obtain frequency diversity gain. Fig. 2 is a schematic diagram of a frequency hopping signal. As shown in fig. 2, 5 time periods are included in the time domain: t1 to t5, comprising 5 frequency domain resources in the frequency domain: the 5 time periods f1 to f5, t1 to t5 correspond to frequency domain resources f3, f1, f5, f2 and f4, respectively.

In the NR system, inter-slot (inter-slot) frequency hopping and intra-slot (intra-slot) frequency hopping are supported. Radio Resource Control (RRC) signaling indicates whether intra-slot frequency hopping or inter-slot frequency hopping is used, and scheduling signaling (e.g., DCI) indicates whether frequency hopping is used in data transmission. Meanwhile, the scheduling signaling also indicates the time-frequency resource of data transmission.

Inter-slot frequency hopping means that frequency domain resources used for information transmission remain unchanged within a slot, but the frequency domain resources used for information transmission change according to a predetermined rule among different slots. FIG. 3 is a schematic diagram of inter-slot frequency hopping. As shown in fig. 3, 2 slots are included in the time domain, each slot has 14 symbols, and 2 frequency domain resources are included in the frequency domain: f1 and f 2. The transmitting end transmits data by using frequency domain resource f1 on the 1 st slot and transmits data by using frequency domain resource f2 on the 2 nd slot. It should be noted that, in the case of an OFDM symbol using a Normal Cyclic Prefix (NCP), one slot may include 14 symbols; in the case of an Extended Cyclic Prefix (ECP) employed for an OFDM symbol, one slot may include 12 symbols. In the embodiment of the present application, one slot includes 14 symbols as an example.

The frequency hopping in the slot refers to that frequency domain resources used for information transmission are changed in the slot according to a preset rule. Taking two-hop frequency hopping in a slot as an example, information to be transmitted is divided into 2 parts, and the two parts use different frequency domain resources to transmit in the slot. FIG. 4 is a diagram of intra-slot frequency hopping. As shown in fig. 4, 1 slot is included in the time domain, and 2 frequency domain resources are included in the frequency domain: f1 and f 2. The information sent by the sending end comprises two parts, namely first part information and second part information. The transmitting end transmits the first partial information using frequency domain resource f2 on symbols 6 to 9, and transmits the second partial information using frequency domain resource f1 on symbols 10 to 13. The shaded portions in fig. 3 and 4 represent the resources occupied by the information transmission. In the embodiments of the present application, the information transmission may be signaling transmission, data transmission or reference signal transmission, and the following describes the embodiments of the present application with data transmission as an example of information transmission.

One scheduling signaling may indicate 1 transmission of data or may indicate a plurality of repeated transmissions of data. Based on this, besides the inter-slot frequency hopping and the intra-slot frequency hopping, other frequency hopping methods such as inter-repetition (inter-repetition) frequency hopping and intra-repetition (intra-repetition) frequency hopping may be used in the frequency hopping transmission method. It is to be understood that in a repeat transmission scenario, the two terms "repeat transmission" and "transmission" are interchangeable.

One possible implementation of inter-repetition frequency hopping is to select the frequency domain resource used for each repetition transmission according to the sequence number of the repetition transmission: repeated transmissions with an odd number use one frequency domain resource and repeated transmissions with an even number use another frequency domain resource. As shown in fig. 5, the same data is transmitted repeatedly 4 times, each transmission occupies 4 symbols, the 1 st transmission and the 3 rd transmission use the same frequency domain resource, which are both f1, and the 2 nd transmission and the 4 th transmission use the same frequency domain resource, which are both f 2.

The repeated internal frequency hopping means that each repeated transmission comprises multiple hops, and frequency domain resources used by each hop are changed according to a preset rule. As shown in fig. 6, data is repeatedly transmitted 4 times, each repeated transmission occupies 4 symbols, each repeated transmission includes two hops, the 1 st hop (i.e., the first 2 symbols of the 4 symbols) of each repeated transmission uses frequency domain resource f1, and the 2 nd hop (i.e., the last 2 symbols of the 4 symbols) of each repeated transmission uses frequency domain resource f 2.

Under the condition of increasing frequency hopping transmission modes such as inter-repetition frequency hopping and intra-repetition frequency hopping, how to indicate which frequency hopping transmission mode is adopted to transmit data needs to be discussed.

The embodiment of the application provides a data transmission method, and exemplarily provides three feasible schemes for indicating a frequency hopping transmission mode of data.

In a first possible scheme, a set is determined from multiple sets of frequency hopping transmission modes through RRC signaling, and then, in combination with the number of repetitions of data transmission in a timeslot, which frequency hopping transmission mode is used to transmit data is determined.

In a second possible scheme, a set is determined from multiple sets of frequency hopping transmission modes through RRC signaling, and then it is determined from the determined set which frequency hopping transmission mode is used to transmit data in combination with DCI.

In a third possible scheme, a set is determined from multiple frequency hopping transmission mode sets through RRC signaling, a subset is determined from the determined set through DCI, and a selected frequency hopping transmission mode is determined according to the number of repetitions of data transmission in a time slot.

It should be noted that the data transmission described in the embodiment of the present application may be uplink transmission, that is, the terminal device sends data to the network device, where the corresponding sending end is the terminal device and the receiving end is the network device; or downlink transmission, that is, the network device sends data to the terminal device, the corresponding sending end is the network device, and the receiving end is the terminal device; or, the data transmission may be device-to-device (D2D), that is, the terminal device sends data to the terminal device, where the corresponding sender is the terminal device and the receiver is another terminal device.

In an embodiment of the present application, the network device may specifically be the network device shown in fig. 1, and the terminal device may specifically be one of the terminal devices shown in fig. 1. It is understood that, in the embodiment of the present application, the function of the network device may also be implemented by a chip applied to the network device, and the function of the terminal device may also be implemented by a chip applied to the terminal device.

The following is a detailed description of the first possible solution. As shown in fig. 7, the method flow includes:

s701, the network equipment sends first indication information to the terminal equipment. Correspondingly, the terminal equipment receives the first indication information from the network equipment.

The first indication information indicates a first frequency hopping transmission mode set, and the first frequency hopping transmission mode set is one frequency hopping transmission mode set in the N frequency hopping transmission mode sets. Each frequency hopping transmission mode set in the N frequency hopping transmission mode sets comprises at least one frequency hopping transmission mode, and N is an integer larger than 1. It is understood that in the present application, "at least one" may be "one", or "two" or "two or more".

Illustratively, the first indication information may be carried in higher layer signaling, such as RRC signaling. For example, two sets of frequency hopping transmission modes, set 1 and set 2, are configured in the network device and the terminal device, respectively, and the bit length of the first indication information may be 1 bit. And when the value of the first indication information is 0, indicating the set 1, and when the value of the first indication information is 1, indicating the set 2. Of course, 3 or more than 3 frequency hopping transmission mode sets may be configured, and the bit length of the first indication information may be determined according to the number of the frequency hopping transmission mode sets.

The N frequency hopping transmission mode sets may be predefined, or may be configured to the terminal device by the network device through RRC signaling.

S702, the network device sends second indication information to the terminal device. Correspondingly, the terminal equipment receives second indication information from the network equipment.

The second indication information indicates a first time-frequency resource for transmitting first data and a number of times the first data is repeatedly transmitted. In one example, the second indication information may include start time domain position information of the 1 st transmission of the first data, a time domain length of the 1 st transmission, and a number of times the first data is repeatedly transmitted (hereinafter simply referred to as a repetition number). In another example, the second indication information may include time domain resource location information for each transmission of data, and a time domain length of 1 transmission, i.e., implicitly indicating the number of repetitions. In yet another example, as shown in table 1, the network device and the terminal device may be configured with a corresponding relationship of a start time domain position, a time domain length, a repetition number, and an index. The second indication information indicates the first time-frequency resource and the repetition number by indicating the index finger.

TABLE 1

Index	Number of repetitions	Starting time domain position	Length of time domain
				0	0 (no repetition times)Number)	A	2 symbol
1	1	B	3 symbol
				2	2	C	2 symbol
3	3	D	3 symbol
				……	……	……	……

And S703, the terminal equipment determines a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the first time-frequency resource and the times of repeatedly transmitting the first data.

S704, the network device determines a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the first time-frequency resource and the number of times of repeatedly transmitting the first data.

In the embodiment of the present application, the sequence between S704 and S702 is not limited, the second indication information may be sent to the terminal device before the network device determines the first frequency hopping transmission mode, or the first frequency hopping transmission mode may be determined after the second indication information is sent.

S705, the terminal equipment sends the first data to the network equipment by using the first frequency hopping transmission mode; correspondingly, the network equipment receives the first data from the terminal equipment by using the first frequency hopping transmission mode. Or the network equipment sends the first data to the terminal equipment by using the first frequency hopping transmission mode; correspondingly, the terminal equipment receives the first data from the network equipment by using the first frequency hopping transmission mode.

Exemplarily, step S704 may be implemented by: and the network equipment determines a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the transmission times of the first data in the first time unit. The number of times the first data is transmitted in the first time unit is determined by the first time-frequency resource and the number of times the first data is repeatedly transmitted. That is, the network device or the terminal device can calculate the actual number of repetitions and the length and the starting time domain position of each repetition transmission, knowing the time domain length, the starting time domain position, and the number of repetitions of the 1 st repetition transmission, thereby being able to determine the number of times the first data is transmitted in one slot. The first frequency hopping transmission mode may thus be selected from the first set of frequency hopping transmission modes in dependence on the number of times the first data is transmitted in a time slot.

The number of times that a timeslot repeatedly transmits first data may be divided into two cases, where one case is that the number of times that the timeslot repeatedly transmits first data is 1, and this case is referred to as an OneRepPerSlot scenario in the embodiment of the present application; in another case, the number of times of transmitting the first data in one slot is greater than 1, and this case is referred to as a multistrepsperslot scenario in the embodiment of the present application.

One possible implementation: for the OneRepPerSlot scene, the first frequency hopping transmission mode selected from the first frequency hopping transmission set can be time slot internal frequency hopping or repeated internal frequency hopping; for a MultiRepsPerSlot scenario, the first hopping transmission mode selected from the first set of hopping transmissions may be inter-repetition hopping. Another possible implementation: for the OneRepPerSlot scene, the first frequency hopping transmission mode selected from the first frequency hopping transmission set can be time slot frequency hopping or repeated frequency hopping; for a MultiRepSPerSlot scenario, the first hopping transmission mode selected from the first set of hopping transmissions may be inter-slot hopping.

As an example, a first mapping relationship may be predefined by a protocol, or configured to a terminal device by the network device through signaling, and when determining the first frequency-hopping transmission mode from the first frequency-hopping transmission mode set according to the number of times that the first data is transmitted in the first time unit is performed, the following steps are performed:

and determining the first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the number of times of transmission of the first data in the first time unit and a first mapping relation. Wherein, the first mapping relationship may include: when the number of times of transmission of the first data in the first time unit is 1, a corresponding frequency hopping transmission mode in a first frequency hopping transmission mode set; and when the number of times of transmission of the first data in the first time unit is greater than 1 time, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode set. For example, the first frequency hopping transmission mode set includes intra-repetition frequency hopping and inter-repetition frequency hopping, when the number of times that the first data is transmitted in the first time unit is greater than 1, the inter-repetition frequency hopping is performed correspondingly, and when the number of times that the first data is transmitted in the first time unit is 1, the intra-repetition frequency hopping is performed correspondingly.

As an example, the first indication information is carried in RRC signaling, and the second indication information is carried in DCI. Table 2 shows an example of a configuration of a frequency hopping transmission scheme set, and two examples of the first mapping relationship are given. First mapping relation example 1: when the value of the first indication information is 0, indicating a set 1, wherein the set 1 comprises two frequency hopping transmission modes of intra-slot (or intra-repetition) and inter-repetition, and the two frequency hopping transmission modes respectively correspond to a oneRepPerSlot scene and a MultiRepSurSlot scene. First mapping example 2: when the value of the first indication information is 1, indicating a set 2, wherein the set 2 comprises two frequency hopping transmission modes of inter-slot (or inter-repetition) and inter-slot, and the two frequency hopping transmission modes respectively correspond to a oneRepPerSlot scene and a MultiRepSurSlot scene. The bit length of the first indication information may be 1 bit. When the DCI indicates to perform frequency hopping, whether the current data transmission scene is an OneRepPerSlot scene or a multistrepspersslot scene may be determined according to the second indication information in the DCI, and then a frequency hopping transmission mode adopted for data transmission scheduled by the DCI is determined. As shown in table 2, for the multistrep station slot scenario, when the first indication information indicates set 1, it may be determined that the data transmission scheduled by the DCI employs an inter-repetition frequency hopping transmission mode. In the method for indicating the frequency hopping transmission mode, the first indication information can reuse signaling bits indicating the frequency hopping transmission mode in the current protocol without newly adding signaling overhead, and forward compatibility of the system can be ensured.

TABLE 2

It should be understood that when the DCI indicates frequency hopping and the number of repetitions of the indication is 1, inter-slot frequency hopping or intra-slot frequency hopping may be used according to the RRC signaling indication as specified by the existing protocol. In such a scenario, since there is no repetitive transmission, it may be equivalent to a onereperplot scenario, and thus the frequency hopping transmission mode may be determined according to the OneRepPerSlot scenario.

The effect of the first possible solution will be briefly described below by way of specific examples.

Intra-slot frequency hopping is adopted in a oneRepPerSlot scene. It should be understood that intra-slot frequency hopping in the OneRepPerSlot scenario is equivalent to intra-repetition frequency hopping. As shown in fig. 8, taking two-time repeated transmission as an example, that is, 1-time repeated transmission is performed in the 1 st slot and the 2 nd slot respectively, 8 symbols are occupied by data transmitted each time, an intra-slot frequency hopping manner is adopted, 8 symbols occupied by each time of repeated transmission are equally divided into a front segment and a rear segment, each segment is 4 symbols, the first 4 symbols adopt a frequency domain resource f2, and the rear 4 symbols adopt a frequency domain resource f 1.

Suppose that intra-slot frequency hopping is also adopted in the MultiRepsPerSlot scene, taking 4 times of repeated transmission, each transmission using 4 symbols as an example. In one possible implementation, if the averaging is performed according to the available symbols in one slot, as shown in fig. 9, the 1 st slot has 3 transmissions using 12 symbols, and each hop uses 6 symbols; the 2 slot has 1 transmission, uses 4 symbols in total, and uses 2 symbols per hop. The first 2 symbols of the 1 st transmission and the 2 nd transmission in the 1 st slot adopt frequency domain resources f 1; the last 2 symbols of the 2 nd transmission and the 3 rd transmission in the 1 st slot employ frequency domain resource f 2. In this implementation, the 2 nd retransmission is divided into two segments, and the two segments respectively use different frequency domain resources, so that each 2 symbols need to use an independent demodulation reference signal (DMRS) to assist the receiving end in performing channel estimation, and the DMRS needs to occupy a certain time-frequency resource, which results in less available resources of data signals and increased system resource overhead. There is only 4 th transmission in the 2 nd slot, and the first 2 symbols adopt frequency domain resource f1, and the last 2 symbols adopt frequency domain resource f2, there is also the problem of increasing system resource overhead. In another possible implementation mode, segmentation can be performed according to a repeated transmission boundary in an intra-slot frequency hopping transmission mode, so that data repeatedly transmitted each time is not segmented into two segments. As shown in fig. 10, the 1 st, 2 nd and 4 th transmissions use frequency domain resource f1, the 3 rd transmission uses frequency domain resource f2, and the 2 nd slot has only 1 repetition without slicing. Thus, the 1 st, 2 nd and 4 th transmissions all use frequency domain resource f1, and only the 3 rd transmission uses frequency domain resource f2, resulting in a reduction in diversity gain. Therefore, intra-slot frequency hopping is adopted in the oneRepPerSlot scene, and intra-slot frequency hopping is not adopted in the MultiRepPerSlot scene, so that the overhead of the DMRS can be reduced, and the frequency diversity gain of the frequency hopping can be improved.

Assume that an intra-repetition frequency hopping transmission scheme is also adopted in a multiresperslot scenario, and as shown in fig. 11, 4 transmissions using 4 symbols each are taken as an example. Each transmission is divided into two hops, and each hop adopts different frequency domain resources for transmission. The 1 st hop of each transmission transmits using frequency domain resource f1 on the first 2 symbols of the 4 symbols; the 2 nd hop for each transmission is transmitted using frequency domain resource f2 on the last 2 symbols of the 4 symbols. Therefore, the frequency domain resource needs to be transformed once every 2 symbols, which not only leads to the realization of complexity improvement, but also leads to the problem that the DMRS overhead is increased, thereby causing the reduction of the system transmission efficiency. In the oneRepPerSlot scene, the intra-slot frequency hopping is equal to the intra-repetition frequency hopping, so that the intra-repetition frequency hopping can be adopted only in the oneRepPerSlot scene, and the intra-repetition frequency hopping is not used in the MultiRepPerSlot scene, so that the transmission efficiency of the system can be improved.

In an OneRepPerSlot scenario, an inter-slot frequency hopping transmission mode may be adopted, as shown in fig. 12, taking two transmissions, each using 7 symbols as an example. The 1 st slot (i.e., transmission 1) uses frequency domain resource f1 and the 2 nd slot (i.e., transmission 2) uses frequency domain resource f 2.

In a multistrepspot scene, an inter-repetition frequency hopping transmission mode may be adopted, as shown in fig. 13, 4 transmissions are taken, each transmission uses 4 symbols as an example, and the transmission is performed 3 times in the 1 st slot and 1 time in the 2 nd slot. The 1 st and 3 rd transmissions use frequency domain resource f1, and the 2 nd and 4 th transmissions use frequency domain resource f 2.

In a multistrepspot scene, an inter-slot frequency hopping transmission mode may also be adopted, as shown in fig. 14, 4 transmissions are taken, each transmission uses 4 symbols as an example, and 2 transmissions are performed in the 1 st slot and 2 transmissions are performed in the 2 nd slot. The 1 st transmission, the 2 nd transmission use frequency domain resource f1, and the 3 rd transmission and the 4 th transmission use frequency domain resource f 2.

In addition, it should be noted that, in order to avoid that DMRS overhead is too large due to intra-slot frequency hopping in an OneRepPerSlot scene, whether to prohibit intra-slot frequency hopping transmission is prohibited may be determined according to the number of symbols occupied by each hop or the number of configured DMRSs. For example, the number of symbols occupied by one hop in 1 transmission is less than L or only 1 symbol is configured in one slot (or 1 transmission) for carrying the DMRS, the slot in which the transmission is located may be prohibited from adopting an intra-slot frequency hopping transmission mode, or the slot in which the transmission is located may be prohibited from adopting an intra-slot frequency hopping transmission mode. Wherein L is a positive integer greater than 1, for example, 3.

The second possible solution is described in detail below. As shown in fig. 15, the method flow includes:

s1501, the network device sends first indication information to the terminal device. Correspondingly, the terminal equipment receives the first indication information from the network equipment. The first indication information indicates a first frequency hopping transmission mode set, and the first frequency hopping transmission mode set is one frequency hopping transmission mode set in the N frequency hopping transmission mode sets. For a more detailed description of S1501, please refer to S701, which is not repeated herein.

S1502, the network device sends the third indication information to the terminal device. Correspondingly, the terminal device receives the third indication information from the network device. Wherein the third indication information indicates a first frequency hopping transmission mode in the first set of frequency hopping transmission modes.

S1503, the terminal device sends the first data to the network device by using the first frequency hopping transmission mode; correspondingly, the network equipment receives the first data from the terminal equipment by using the first frequency hopping transmission mode. Or the network equipment sends the first data to the terminal equipment by using the first frequency hopping transmission mode; correspondingly, the terminal equipment receives the first data from the network equipment by using the first frequency hopping transmission mode.

Illustratively, the first indication information may be carried in RRC signaling and the third indication information may be carried in DCI. And jointly indicating the frequency hopping transmission mode of the data through RRC signaling and DCI.

Further, the first frequency hopping transmission mode may be a single-mode frequency hopping transmission mode, such as intra-slot frequency hopping, inter-repetition frequency hopping, and intra-repetition frequency hopping. The first frequency hopping transmission mode may also be a hybrid frequency hopping mode, such as a hybrid frequency hopping mode of inter-slot frequency hopping and inter-repeat frequency hopping, a hybrid frequency hopping mode of intra-slot frequency hopping and inter-slot frequency hopping, and a hybrid frequency hopping mode of inter-repeat frequency hopping and inter-repeat frequency hopping. The first frequency hopping transmission mode may also be a non-frequency hopping transmission mode, i.e. no frequency hopping technique is used in the data transmission process. Of course the first frequency hopping transmission scheme may also be another kind of frequency hopping transmission scheme that may occur in the future. The first set of frequency hopping transmission schemes may comprise at least one of the above-mentioned frequency hopping transmission schemes.

The mixed frequency hopping mode of frequency hopping between time slots and frequency hopping between repetitions can enable frequency domain resources adopted between adjacent repeated transmissions located in one time slot to be different, and the frequency domain resources adopted between different time slots are partially or completely different, so that frequency diversity gain is improved. Fig. 16(a) shows an example of a hybrid frequency hopping method of inter-slot frequency hopping and inter-repetition frequency hopping. As shown in fig. 16(a), the 1-time schedule includes 4 transmissions using 4 symbols per transmission, the 1 st and 2 nd transmissions are located at the 1 st slot, the 3 rd and 4 th transmissions are located at the 2 nd slot, the 1 st and 4 th transmissions use frequency domain resources f1, and the 2 nd and 3 rd transmissions use frequency domain resources f 2. Fig. 16(B) shows another example of a hybrid hopping scheme of inter-slot hopping and inter-repetition hopping. As shown in fig. 16(B), the 1-time schedule includes 4 transmissions, each transmission uses 4 symbols, the 1 st and 2 nd transmissions are located at the 1 st slot, the 3 rd and 4 th transmissions are located at the 2 nd slot, the 1 st transmission uses frequency domain resource f1, the 2 nd transmission uses frequency domain resource f2, the 3 rd transmission uses frequency domain resource f3, and the 4 th transmission uses frequency domain resource f 4.

As an example, in an OneRepPerSlot scenario, when it is determined to use a hybrid frequency hopping method of inter-slot frequency hopping and inter-repetition frequency hopping, data transmission may be performed according to the inter-slot frequency hopping or the inter-repetition frequency hopping. In a MultiRepSPerSlot scene, when a hybrid frequency hopping mode of inter-slot frequency hopping and inter-repetition frequency hopping is determined, data transmission can be performed according to the inter-repetition frequency hopping.

The mixed frequency hopping mode of frequency hopping between time slots and frequency hopping within repetition can lead the frequency domain resources used in different time slots to be partially or completely different, and the frequency domain resources used in 1 time of repetition are not completely the same, thereby improving the frequency diversity gain. Fig. 16(C) shows an example of a hybrid frequency hopping method of inter-slot frequency hopping and intra-repeat frequency hopping. As shown in fig. 16(C), scheduling 1 includes two transmissions, each transmission using 8 symbols, transmission 1 on the 1 st slot, transmission 2 on the 2 nd slot, hop 1 of transmission 1 (i.e., the first 4 symbols of transmission 1) using frequency domain resource f1, hop 2 of transmission 1 (i.e., the last 4 symbols of transmission 1) using frequency domain resource f2, hop 1 of transmission 2 (i.e., the first 4 symbols of transmission 2) using frequency domain resource f2, and hop 2 of transmission 2 (i.e., the last 4 symbols of transmission 2) using frequency domain resource f 1. Fig. 16(D) shows another example of a hybrid hopping scheme of inter-slot hopping and intra-repeat hopping. As shown in fig. 16(D), scheduling 1 time includes two transmissions, each transmission using 8 symbols, transmission 1 on slot 1, transmission 2 on slot 2, hop 1 of transmission 1 using frequency domain resource f1, hop 2 of transmission 1 using frequency domain resource f2, hop 1 of transmission 2 using frequency domain resource f3, and hop 2 of transmission 2 using frequency domain resource f 4. The principle of the hybrid frequency hopping mode of inter-slot frequency hopping and intra-slot frequency hopping is similar to that of the above hybrid frequency hopping mode of inter-slot frequency hopping and intra-repeat frequency hopping, and the description thereof can be referred to for the relevant description, which is not repeated herein.

Yet another example of a hybrid hopping scheme of inter-slot hopping and intra-repeat hopping. For example, the network device notifies that data transmission uses 13 symbols, and starts from the 12 th symbol of the 1 st slot, the data transmission is divided into 2 transmissions because the data transmission crosses the slot boundary, that is, the 1 st transmission occupies the 12 th to 14 th symbols of the 1 st slot, the 2 nd transmission occupies the 1 st to 10 th symbols of the 2 nd slot, and the 2 nd transmission is divided into two parts, each part occupies 5 symbols. If a hybrid frequency hopping transmission mode of inter-slot frequency hopping and repeated intra-frequency hopping is used, 3 symbols are occupied in the 1 st slot for the 1 st transmission according to the preset criterion, and the frequency domain resource f1 is used for the 1 st transmission, the frequency domain resource f2 is used for the first part of the 2 nd transmission, and the frequency domain resource f1 is used for the second part of the 2 nd transmission because the number of the symbols is less, so that frequency hopping is not performed. In addition, in this case, a better time diversity gain can be obtained compared to a transmission scheme that simply uses inter-slot frequency hopping. If the transmission method of inter-slot frequency hopping is adopted, the 1 st transmission uses frequency domain resource f1, and the 2 nd transmission uses frequency domain resource f2, i.e. the first part and the second part both use frequency domain resource f 2. As can be seen from the above, when using the hybrid frequency hopping transmission scheme of inter-slot frequency hopping and intra-repeat frequency hopping, the frequency resource f1 is used at certain intervals in time, so that better time diversity gain can be obtained.

The hybrid frequency hopping mode of frequency hopping in the time slot and frequency hopping between repetitions can make the frequency domain resources used between adjacent repeated transmissions partially or totally different, and multiple frequency domain resources are used in the time slot, thereby improving the frequency diversity gain. An example of a hybrid hopping scheme of intra-slot hopping and inter-repetition hopping can also be seen in fig. 16(a) and fig. 16 (B).

The mixed frequency hopping mode of frequency hopping in the time slot and frequency hopping in the repetition can ensure that the frequency domain resources adopted in 1 time of repetition are not completely the same. For an example of a hybrid frequency hopping method of intra-slot frequency hopping and intra-repeat frequency hopping, referring to fig. 16(E), taking two transmissions, each of which transmits 7 symbols, as an example, the first 3 symbols of the 1 st transmission use frequency domain resources of frequency f1, the last 4 symbols of the 1 st transmission use frequency domain resources of frequency f2, the first 3 symbols of the 2 nd transmission use frequency domain resources of frequency f2, and the last 4 symbols of the 2 nd transmission use frequency domain resources of frequency f 1. Another example of a hybrid frequency hopping method of frequency hopping within a slot and frequency hopping within a repetition is shown in fig. 16(F), taking two transmissions, each of which transmits 7 symbols, as an example, the two transmissions are located in the same slot, the first 3 symbols of the 1 st transmission use frequency domain resources of frequency F4, the last 4 symbols of the 1 st transmission use frequency domain resources of frequency F3, the 2 nd slot, that is, the first 3 symbols of the 2 nd transmission use frequency domain resources of frequency F2, and the last 4 symbols of the 2 nd transmission use frequency domain resources of frequency F1.

In one example, the first indication information is carried in RRC signaling, the third indication information is carried in DCI, the bit length of the first indication information is 1 bit, the bit length of the third indication information is 2 bits, 1 bit of the first indication information is used to indicate whether to perform frequency hopping, and 2 bits occupied by the third indication information are used to indicate 4 frequency hopping transmission modes.

In another example, the bit length of the first indication information is 2 bits, the bit length of the third indication information is 1 bit, 1 bit of the third indication information is used to indicate whether to perform frequency hopping, and 2 bits occupied by the second indication information are used to indicate 4 frequency hopping transmission modes. As an example, the 4 hopping transmission modes may include intra-slot hopping, inter-repetition hopping, and intra-repetition hopping.

A third possible solution is described in detail below. Referring to fig. 17, for an uplink transmission example, the downlink transmission is similar to the uplink transmission, and details are not repeated. The method flow may include steps S1701-S1706. The method comprises the following steps:

s1701, the network device transmits first indication information to the terminal device. Correspondingly, the terminal equipment receives the first indication information from the network equipment. The first indication information indicates a first frequency hopping transmission mode set, and the first frequency hopping transmission mode set is one frequency hopping transmission mode set in the N frequency hopping transmission mode sets. For a more detailed description of S1701, please refer to S701, which is not described herein.

S1702, the network device sends fourth indication information to the terminal device. Correspondingly, the terminal device receives the fourth indication information from the network device.

The fourth indication information indicates a first frequency hopping transmission mode subset in the first frequency hopping transmission mode set, where the first frequency hopping transmission mode subset is one of M frequency hopping transmission mode subsets included in the first frequency hopping transmission mode set, each of the M frequency hopping transmission mode subsets includes at least one frequency hopping transmission mode, and M is an integer greater than 1.

S1703, the network device sends second indication information to the terminal device. Correspondingly, the terminal equipment receives second indication information from the network equipment.

Wherein the second indication information indicates a first time-frequency resource for transmitting first data and a number of times the first data is repeatedly transmitted. For a more detailed description of the second indication information, reference may be made to S702, which is not described herein.

S1704, the network device determines a first frequency hopping transmission mode from the first frequency hopping transmission mode subset according to the first time-frequency resource and the number of times of repeatedly transmitting the first data.

S1705, the terminal device determines a first frequency hopping transmission mode from the first frequency hopping transmission mode subset according to the first time-frequency resource and the number of times of repeatedly transmitting the first data.

S1706, the terminal device sends the first data to the network device by using the first frequency hopping transmission mode; correspondingly, the network equipment receives the first data from the terminal equipment by using the first frequency hopping transmission mode. Or the network equipment sends the first data to the terminal equipment by using the first frequency hopping transmission mode; correspondingly, the terminal equipment receives the first data from the network equipment by using the first frequency hopping transmission mode.

For example, the second indication information and the fourth indication information may both be carried in DCI, in this case, S1702 and S1703 may be combined into one step, that is, the network device sends DCI to the terminal device, where the DCI carries the second indication information and the fourth indication information.

In a third feasible scheme, the adopted frequency hopping transmission mode is determined through the first indication information, the second indication information and the fourth indication information, that is, the adopted frequency hopping transmission mode is determined by adding judgment on an OneRepPerSlot scene and a multistrepspersslot scene on the basis of the indication through the RRC and the DCI.

As an example, the second mapping relationship may be predefined by a protocol, or configured to the terminal device by signaling by the network device, and when determining the first frequency hopping transmission mode from the first frequency hopping transmission mode subset is performed, the following steps are performed:

and determining the first frequency hopping transmission mode from the first frequency hopping transmission mode subset according to the number of times of transmission of the first data in the first time unit and a second mapping relation. Wherein, the second mapping relationship may include: in an OneRepPerSlot scene, a corresponding frequency hopping transmission mode in the first frequency hopping transmission mode subset; and in a MultiRepSPerSlot scene, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode subset. For example, the first frequency hopping transmission mode subset includes an inter-repetition + inter-slot hybrid frequency hopping mode and an inter-slot frequency hopping mode, a OneRepPerSlot scene corresponds to the inter-slot frequency hopping, a multistrepspot slot scene corresponds to the inter-repetition + inter-slot hybrid frequency hopping mode.

Illustratively, the frequency hopping transmission mode adopted in the OneRepPerSlot scene may include an intra-slot frequency hopping, an inter-slot frequency hopping, an intra-repetition frequency hopping, an inter-repetition frequency hopping, a mixed frequency hopping transmission mode of the inter-slot frequency hopping and the inter-repetition frequency hopping, or a mixed frequency hopping transmission mode of the inter-slot frequency hopping and the intra-repetition frequency hopping. The frequency hopping transmission mode adopted in the multistrep spot scene may include a hybrid frequency hopping transmission mode of inter-repetition frequency hopping, inter-slot frequency hopping and inter-repetition frequency hopping, a hybrid frequency hopping transmission mode of intra-slot frequency hopping and inter-repetition frequency hopping, or a hybrid frequency hopping transmission mode of intra-slot frequency hopping and intra-repetition frequency hopping. The subset may include two frequency hopping transmission modes, one of which is any one of the above described frequency hopping transmission modes that can be adopted in an OneRepPerSlot scene, and the other of which is any one of the above described frequency hopping transmission modes that can be adopted in a multistrepperslot scene.

For example, the bit length of the first indication information and the bit length of the fourth indication information are both 1 bit, and in combination with the OneRepPerSlot scene or the multistrepsparslot scene determined according to the second indication information, at most 8 frequency hopping transmission modes can be indicated. For example, the value of the first indication information is 1, the indication set 2 includes two subsets, namely subset 1 and subset 2, and the subset 1 includes inter-repetition and intra-slot. The subset 2 comprises an inter-repetition + inter-slot hybrid frequency hopping mode and an inter-slot frequency hopping mode. When the value of the fourth indication information is 0, the subset 1 is indicated, and when the value of the fourth indication information is 1, the subset 2 is indicated. In the subset 1, for the OneRepPerSlot scene, an intra-slot frequency hopping transmission mode is adopted; for a MultiRepSPerSlot scene, an inter-repetition frequency hopping transmission mode is adopted. In the subset 2, for the OneRepPerSlot scene, adopting an inter-slot frequency hopping transmission mode; for a MultiRepSerSlot scene, an inter-repetition + inter-slot hybrid frequency hopping mode is adopted.

As an example, the subset of frequency hopping transmission modes may further include only one frequency hopping transmission mode, and both the OneRepPerSlot scenario and the multistrepspersslot scenario may use the frequency hopping transmission mode.

In one example, as shown in table 3, when a value of first indication information in an RRC signaling is 0 and a value of fourth indication information in DCI is 1, frequency hopping transmission modes corresponding to a multistrep slot scene and an onerep slot scene are both inter-slot frequency hopping. And when the value of the first indication information is 0 and the value of the fourth indication information is 0, the indicated frequency hopping transmission mode is disabled, namely, the indicated frequency hopping transmission mode is a non-frequency hopping transmission mode. When the value of the first indication information is 1 and the value of the fourth indication information is 1, the frequency hopping transmission mode is inter-slot frequency hopping in an OneRepPerSlot scene, and the frequency hopping transmission mode is inter-slot + inter-repetition in a MultiRepPerSlot scene, namely a hybrid frequency hopping mode of inter-slot frequency hopping and inter-repetition frequency hopping. When the value of the first indication information is 1 and the value of the fourth indication information is 0, the frequency hopping transmission mode is intra-slot frequency hopping in an OneRepPerSlot scene, and the frequency hopping transmission mode is inter-repetition frequency hopping in a MultiRepPerSlot scene. Tables 4 and 5 show another example of the embodiment of the present application.

TABLE 3

TABLE 4

TABLE 5

It is to be understood that, in order to implement the functions in the above embodiments, the network device and the terminal device include hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as computer software, hardware, or combinations of hardware and computer software. Whether a function is performed as hardware or computer software driven hardware depends on the particular application scenario and design constraints imposed on the solution.

Fig. 18 and 19 are schematic structural diagrams of a possible communication device provided in an embodiment of the present application. These communication devices can be used to implement the functions of the terminal device or the network device in the above method embodiments, so that the beneficial effects of the above method embodiments can also be achieved. In the embodiment of the present application, the communication apparatus may be any one of the terminal device 130 or the terminal device 140 shown in fig. 1, may also be a network device shown in fig. 1, and may also be a module (e.g., a chip) applied to the terminal device or the network device.

As shown in fig. 18, the communications apparatus 1800 includes a processing unit 1810 and a transceiver unit 1820. The communication device 1800 is used to implement the functions of the terminal device or the network device in the method embodiments shown in fig. 7, fig. 15 or fig. 17.

For example, when the communication apparatus 1800 is used to implement the functions of the terminal device in the above method embodiments: the transceiving unit 1820 may be configured to receive indication information (e.g., a first indication, a second indication, a third indication, or a fourth indication) from a network device; the processing unit 1810 is configured to determine a first frequency hopping transmission mode according to the first time-frequency resource used for transmitting the first data and the number of times of repeatedly transmitting the first data, so that the transceiver unit 1820 may transmit data to the network device or receive data from the network device by using the first frequency hopping transmission mode.

As another example, when the communication apparatus 1800 is used to implement the functions of the network device in the above method embodiments: the transceiving unit 1820 is configured to send indication information (e.g., first indication information, second indication information, third indication information, or fourth indication information) to the terminal device; the processing unit 1810 is configured to determine a first frequency hopping transmission mode according to the first time-frequency resource used for transmitting the first data and the number of times of repeatedly transmitting the first data, so that the transceiver unit 1820 may receive data from the terminal device or transmit data to the terminal device by using the first frequency hopping transmission mode.

More detailed descriptions about the processing unit 1810 and the transceiver unit 1820 may be directly obtained by referring to the related descriptions in the foregoing method embodiments, and are not repeated herein.

As shown in fig. 19, communications device 1900 includes a processor 1910 and interface circuits 1920. Processor 1910 and interface circuitry 1920 are coupled to each other. It is understood that interface circuit 1920 may be a transceiver or an input-output interface. Optionally, the communications apparatus 1900 may also include a memory 1930 for storing instructions to be executed by the processor 1910, or for storing input data required by the processor 1910 to execute the instructions, or for storing data generated by the processor 1910 after executing the instructions.

When the communications apparatus 1900 is configured to implement the method in the foregoing method embodiments, the processor 1910 is configured to execute the functions of the processing unit 1810 described above, and the interface circuit 1920 is configured to execute the functions of the transceiver 1820 described above.

When the communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiment. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, wherein the information is sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, where the information is sent by the terminal device to the network device.

When the communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, wherein the information is sent to the network device by the terminal device; alternatively, the network device chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the network device to the terminal device.

As shown in fig. 20, the present application further provides a schematic structural diagram of a network device (e.g., a base station). The base station may be applied in the scenario of the communication system shown in fig. 1, and the base station may be a network device in the foregoing method embodiment.

Specifically, the base station 2000 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 2001 and one or more baseband units (BBUs) 2002. The RRU2001 may be a transceiver unit, transceiver circuit, or transceiver, etc., which may include a radio frequency unit 20012. Optionally, the RRU2001 may also include at least one antenna 20011. The RRU2001 may be used for transceiving radio frequency signals and converting radio frequency signals to baseband signals. The BBU2002 section can be used for baseband processing, control of base stations, and the like. The RRU2001 and BBU2002 may be integrated in one device, or may be two independent devices, i.e., distributed base stations.

The BBU2002 is a control center of the base station, which may also be referred to as a processing unit, for performing baseband processing functions, such as channel coding and decoding, multiplexing and demultiplexing, modulation and demodulation, and the like.

In an example, the BBU2002 may be formed by one or more boards, where the boards may support a radio access network of a single access system together, may also support radio access networks of different access systems respectively, and may also support radio access networks of multiple different access systems simultaneously. The BBU2002 can also include a memory 20021 and a processor 20022. The memory 20021 is used to store necessary instructions and/or data. The processor 20022 is used for controlling the base station to perform necessary actions.

As shown in fig. 21, the present application further provides a schematic structural diagram of a terminal device, where the terminal device may be configured to implement the functions of the terminal device in the foregoing method embodiment. For convenience of explanation, fig. 21 shows only main components of the terminal device. As shown in fig. 21, the terminal device 2100 may include a processor 2102, a memory, a transmission/reception control unit 2101, and optionally, an antenna and/or an input/output device. The processor may be used to process communication protocols and communication data, and to control the user equipment and execute software programs. The memory may store software programs and/or data. The transceiving control unit can be used for converting the baseband signal and the radio frequency signal and processing the radio frequency signal. The transceiving control unit 2101 together with the antenna, which may also be called a transceiver, may be used for transceiving radio frequency signals. Input and output devices, such as touch screens, display screens, keyboards, etc., can be used to receive data entered by a user and to output data to the user.

It is understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general purpose processor may be a microprocessor, but may be any conventional processor.

The method steps in the embodiments of the present application may be implemented by hardware, or may be implemented by software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), programmable ROM, Erasable PROM (EPROM), Electrically EPROM (EEPROM), registers, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in an access network device or a terminal device. Of course, the processor and the storage medium may reside as discrete components in an access network device or a terminal device.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; or an optical medium, such as a DVD; it may also be a semiconductor medium, such as a Solid State Disk (SSD).

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

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 exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the text of the present application, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

Claims

1. A method of data transmission, comprising:

receiving first indication information from a network device, where the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one of N frequency hopping transmission mode sets, each of the N frequency hopping transmission mode sets includes at least one frequency hopping transmission mode, and N is an integer greater than 1;

receiving second indication information from the network device, the second indication information indicating a first time-frequency resource for transmitting first data and a number of times the first data is repeatedly transmitted;

determining a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the first time-frequency resource and the number of times of repeatedly transmitting the first data;

and receiving the first data from the network equipment by using the first frequency hopping transmission mode, or sending the first data to the network equipment by using the first frequency hopping transmission mode.

2. The method of claim 1, wherein the determining a first frequency hopping transmission mode from the first set of frequency hopping transmission modes according to the first time-frequency resource and the number of times of repeated transmission of the first data comprises:

and determining the first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the number of times of transmission of the first data in a first time unit, wherein the number of times of transmission of the first data in the first time unit is determined by the first time-frequency resource and the number of times of repeated transmission of the first data.

3. The method of claim 2, wherein the determining the first frequency hopping transmission mode from the first set of frequency hopping transmission modes according to the number of times the first data is transmitted in the first time unit specifically comprises:

determining the first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the number of times of transmission of the first data in the first time unit and a first mapping relation, wherein the first mapping relation includes:

when the number of times of transmission of the first data in the first time unit is 1, a corresponding frequency hopping transmission mode in a first frequency hopping transmission mode set; and

and when the number of times of transmission of the first data in the first time unit is greater than 1 time, the corresponding frequency hopping transmission mode in the first frequency hopping transmission mode set.

4. The method according to any of claims 1 to 3, wherein the first indication information is carried in radio resource control, RRC, signaling.

5. The method according to any of claims 1 to 4, wherein the second indication information is carried in downlink control information, DCI.

6. A method of data transmission, comprising:

sending first indication information to a terminal device, where the first indication information indicates a first frequency hopping transmission mode set, the first frequency hopping transmission mode set is one of N frequency hopping transmission mode sets, each of the N frequency hopping transmission mode sets includes at least one frequency hopping transmission mode, and N is an integer greater than 1;

sending second indication information to the terminal equipment, wherein the second indication information indicates a first time-frequency resource used for transmitting first data and the number of times of repeatedly transmitting the first data;

and receiving the first data from the terminal equipment by using the first frequency hopping transmission mode, or sending the first data to the terminal equipment by using the first frequency hopping transmission mode.

7. The method of claim 6, wherein determining a first frequency hopping transmission mode from the first set of frequency hopping transmission modes according to the first time-frequency resource and the number of times the first data is repeatedly transmitted comprises:

and determining a first frequency hopping transmission mode from the first frequency hopping transmission mode set according to the number of times of transmission of the first data in a first time unit, wherein the number of times of transmission of the first data in the first time unit is determined by the first time-frequency resource and the number of times of repeated transmission of the first data.

8. The method of claim 7, wherein the determining the first frequency hopping transmission mode from the first set of frequency hopping transmission modes according to the number of times the first data is transmitted in the first time unit specifically comprises:

9. The method according to any of claims 6 to 8, wherein the first indication information is carried in radio resource control, RRC, signaling.

10. The method according to any of claims 6 to 9, wherein the second indication information is carried in downlink control information, DCI.

11. A communications device comprising means for performing the method of any of claims 1 to 5 or 6 to 10.

12. A communications device comprising a processor and interface circuitry for receiving and transmitting signals from or sending signals to other communications devices than the communications device, the processor being arranged to implement the method of any one of claims 1 to 5 or 6 to 10 by means of logic circuitry or executing code instructions.

13. A computer readable storage medium storing computer instructions that, when executed, cause the method of any of claims 1-5 or 6-10 to be performed.