CN110959258B

CN110959258B - Data transmission method and device

Info

Publication number: CN110959258B
Application number: CN201780093457.3A
Authority: CN
Inventors: 李振宇; 张武荣; 韩金侠; 南杨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-08-25
Filing date: 2017-08-25
Publication date: 2021-07-09
Anticipated expiration: 2037-08-25
Also published as: WO2019037137A1; CN110959258A

Abstract

The embodiment of the application discloses a data transmission method and a data transmission device, relates to the field of communication, and solves the problem that a base station possibly cannot receive data sent by a terminal under the condition that the bandwidth of a downlink channel is greater than or equal to the bandwidth of an uplink channel. Firstly, terminal equipment determines at least one downlink time-frequency resource position transmitted in a frequency hopping mode, and receives downlink data sent by network equipment on a first downlink time-frequency resource position of the at least one downlink time-frequency resource position; then, the terminal device determines a first frequency domain range and a frequency domain range of a second time-frequency resource position, wherein the first frequency domain range is the same as the frequency domain range of the first downlink time-frequency resource position, and the frequency domain range of the second time-frequency resource position is the same as the first frequency domain range or in the first frequency domain range; and finally, the terminal equipment sends uplink data to the network equipment at the second time-frequency resource position. The embodiment of the application is used for transmitting data.

Description

Data transmission method and device

Technical Field

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

Background

According to the latest published international spectrum white paper of the Federal Communications Commission (FCC), unauthorized (unlicensed) spectrum resources are larger than authorized spectrum resources, and if the unauthorized spectrum can be effectively utilized, the spectrum efficiency of wireless communication is necessarily greatly improved. In the prior art, an unlicensed Machine Type Communication (eMTC-U) is a Machine Communication technology that operates on an unlicensed spectrum, and is mainly used for achieving long-distance, low-cost, and low-power consumption Communication of the internet of things. The terminal may communicate with the base station using Frequency-Hopping Spread Spectrum (FHSS), among others. For example, the terminal sends uplink data to the base station by using a non-adaptive frequency hopping technology, the bandwidth of the used uplink channel is determined by the capability of the terminal itself, for example, the main working frequency point is 2.4GHz, the system bandwidth of the terminal is 1.4MHz, and the terminal can also be extended to other unlicensed spectrum, such as sub1GHz specified by the Internet of things (IoT) including 315MHz, 433MHz, 868MHz, 915MHz, and the like, the base station sends downlink data to the terminal by using a frequency hopping or broadband technology, and the bandwidth of the used downlink channel can be a frequency hopping bandwidth or a broadband bandwidth, such as 180KHz, 1.4MHz, 5MHz, 10MHz, or 20 MHz. When the base station sends downlink data to the terminal, the downlink channel bandwidth occupied by the base station each time is larger than or equal to the uplink channel bandwidth when the terminal sends uplink data to the base station. If multiple terminals perform frequency hopping within the whole frequency range used by the base station to transmit uplink data to the base station, the multiple terminals occupy a wide frequency band (for example, the bandwidth of the 2.4GHz band is 83.5MHz) in the frequency domain, which results in that the frequency band occupied by the multiple terminals for transmitting uplink data is larger than the frequency band occupied by the base station for transmitting downlink data, the base station is difficult to receive the uplink data transmitted by the multiple terminals within the whole frequency range, and simultaneously, the purpose of reducing interference with other systems by the base station and the terminals through frequency hopping is violated, and the coexistence effect is affected.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device, when a base station and a terminal both adopt a frequency hopping mode for data communication, the base station can receive uplink data sent by a plurality of terminals in a narrow frequency band. In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

in a first aspect of the embodiments of the present application, a data transmission method is provided, including: firstly, terminal equipment determines at least one downlink time-frequency resource position transmitted in a frequency hopping mode, and receives downlink data sent by network equipment at a first downlink time-frequency resource position of the at least one downlink time-frequency resource position; then, the terminal equipment determines the frequency domain range of the first downlink time-frequency resource position and the frequency domain range of the second time-frequency resource position, wherein the frequency domain range of the second time-frequency resource position is the same as the frequency domain range of the first downlink time-frequency resource position or is in the frequency domain range of the first downlink time-frequency resource position; and finally, the terminal equipment sends uplink data to the network equipment at the second time-frequency resource position. In the data transmission method according to the embodiment of the present application, before the terminal device sends uplink data to the network device in a frequency hopping manner, it needs to determine a frequency domain range of a first downlink time-frequency resource location for receiving downlink data, then, determining the frequency domain range of the second time frequency resource position used by the terminal device to send the uplink data to the network device, when the terminal equipment sends uplink data to the network equipment in a frequency hopping mode, the used second time frequency resource positions are all in the frequency domain range of the first downlink time frequency resource position, therefore, when a plurality of terminal devices transmit uplink data to the network device in the same frequency hopping mode, the network device can receive the uplink data transmitted by the plurality of terminals in a narrower frequency band, meanwhile, the method also meets the aim that the network equipment and the terminal equipment reduce the interference with other systems through frequency hopping.

With reference to the first aspect, in a possible implementation manner, the frequency domain range of at least one downlink time-frequency resource location is respectively indicated by corresponding downlink channel numbers. Therefore, the frequency domain range of the downlink time-frequency resource position is indicated by the downlink channel number, so that the terminal equipment can determine the frequency domain range of the downlink time-frequency resource position by calculating the downlink channel number.

In order to determine the frequency domain range of the first downlink time-frequency resource location, in combination with the foregoing possible implementation manners, in another possible implementation manner, the determining, by the terminal device, the first frequency domain range specifically includes: the method comprises the steps that the terminal equipment determines at least one of a frame number, a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number, wherein the frame number is used for indicating the time when the terminal equipment receives downlink data, the physical cell identifier is used for indicating a cell where the terminal equipment is located, the downlink channel bandwidth is used for indicating the maximum bandwidth when the network equipment sends the downlink data to the terminal equipment, the available channel list comprises the state of channels used for data transmission between the network equipment and the terminal equipment, and the minimum channel number is used for indicating the number of the channels used for data transmission between the network equipment and the terminal equipment; the terminal equipment obtains a first downlink channel number according to at least one item of a frame number, a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number determined by the terminal equipment, wherein the first downlink channel number is used for indicating a first frequency domain range.

In order to determine the frequency domain range of the second downlink time-frequency resource location, in combination with the foregoing possible implementation manners, in another possible implementation manner, the determining, by the terminal device, the frequency domain range of the second downlink time-frequency resource location specifically includes: the terminal equipment determines the frequency domain range of the second time-frequency resource position according to a preset algorithm; or the terminal device determines the frequency domain range of the second time-frequency resource position based on the scheduling of the network device.

Since the frequency domain range of at least one downlink time-frequency resource location may be respectively indicated by a corresponding downlink channel number, and similarly, the frequency domain range of the second time-frequency resource location may also be indicated by a corresponding uplink channel number, in combination with the above possible implementation manners, in another possible implementation manner, the terminal device determines the frequency domain range of the second time-frequency resource location according to a preset algorithm, which specifically includes: and the terminal equipment determines at least one uplink subchannel number, wherein the at least one uplink subchannel number is used for indicating the frequency domain range of the second time-frequency resource position.

With reference to the foregoing possible implementation manner, in another possible implementation manner, the determining, by the terminal device, at least one uplink subchannel number specifically includes: and the terminal equipment determines at least one uplink sub-channel number according to the frame number, the subframe number and the identification information of the terminal equipment.

With reference to the foregoing possible implementation manners, in another possible implementation manner, before the terminal device determines at least one uplink subchannel number, the method further includes: and the terminal equipment receives at least one virtual sub-channel number transmitted by the network equipment.

With reference to the foregoing possible implementation manner, in another possible implementation manner, the determining, by the terminal device, at least one uplink subchannel number specifically includes: the terminal equipment determines at least one uplink subchannel number according to at least one virtual subchannel number and the corresponding relation between the virtual subchannel number and the uplink subchannel number, wherein the corresponding relation between the virtual subchannel number and the uplink subchannel number comprises time-related parameters. Therefore, the terminal device uses different corresponding relations between the virtual sub-channel numbers and the uplink sub-channel numbers at different times, and the terminal device determines different uplink sub-channel numbers according to the virtual sub-channel numbers at different times, which is equivalent to that the terminal device uses different uplink sub-channels at different times, so that the terminal device can conveniently send data to the network device in a frequency hopping mode.

In another possible implementation manner, in combination with the above possible implementation manner, the corresponding relationship between the virtual subchannel number and the uplink subchannel number is pre-configured by the network device for the terminal device through the fixed channel.

With reference to the foregoing possible implementation manner, in another possible implementation manner, the sending, by the terminal device, the uplink data to the network device at the second time-frequency resource location specifically includes: and if the available time length of the uplink subchannel corresponding to at least one uplink subchannel number used by the terminal equipment is less than the available time length of the first downlink channel corresponding to the first downlink channel number, the terminal equipment performs frequency hopping in the frequency range of the first downlink channel and sends uplink data to the network equipment. Therefore, the terminal equipment can make full use of frequency resources to carry out frequency hopping, and the utilization rate of the resources can be improved, and the anti-interference performance can be improved.

In a second aspect of the embodiments of the present application, a data transmission method is provided, including: the network equipment transmits downlink data on at least one downlink time-frequency resource position in a frequency hopping mode, wherein the at least one downlink time-frequency resource position comprises a first downlink time-frequency resource position; the network device receives the uplink data sent by the terminal device at a second time-frequency resource position, where the frequency domain range of the second time-frequency resource position is the same as the frequency domain range of the first downlink time-frequency resource position, or the first downlink time-frequency resource position is a resource used by the network device to send the downlink data to the terminal device. In the data transmission method according to the embodiment of the present application, the uplink data received by the network device is sent by the terminal device at the second time-frequency resource location, the second time-frequency resource location is determined before the terminal device sends the uplink data to the network device in a frequency hopping manner, and the second time-frequency resource locations are all within the frequency domain of the first downlink time-frequency resource location used by the network device to send the downlink data to the terminal device, so that, when multiple terminal devices send the uplink data to the network device in the same frequency hopping manner, the network device can receive the uplink data sent by multiple terminals in a narrower frequency band, and simultaneously, the purpose of reducing interference with other systems by the network device and the terminal device through frequency hopping is also met.

With reference to the second aspect, in a possible implementation manner, before the network device receives the uplink data sent by the terminal device at the second time-frequency resource location, the method further includes: and the network equipment sends a first indication to the terminal equipment, wherein the first indication is used for indicating the time frequency resource used by the terminal equipment for sending the uplink data to the network equipment at the second time frequency resource position. So that the terminal device determines the second time-frequency resource position for sending the uplink data to the network device. Or, the first indication is used to indicate a time resource used by the terminal device to send uplink data to the network device at the second time-frequency resource position. Therefore, the terminal equipment determines the second time resource position for sending the uplink data to the network equipment, and the terminal equipment calculates and determines the frequency domain resource through a pre-defined frequency hopping calculation method.

With reference to the foregoing possible implementation manner, in another possible implementation manner, before the network device sends the downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further includes: the network equipment determines at least one downlink time-frequency resource position transmitted in a frequency hopping mode. So that the terminal device can determine the frequency domain range of the first downlink time-frequency resource position for receiving the downlink data.

In another possible implementation manner, in combination with the above possible implementation manner, the frequency domain range of at least one downlink time-frequency resource location is respectively indicated by corresponding downlink channel numbers.

With reference to the foregoing possible implementation manner, in another possible implementation manner, before the network device sends the downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further includes: the network equipment sends at least one of a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number to the terminal equipment, wherein the physical cell identifier is used for indicating a cell where the terminal equipment is located, the downlink channel bandwidth is used for indicating the maximum bandwidth of downlink data sent to the terminal equipment by the network equipment, and the available channel list comprises the state of a channel used for data transmission between the network equipment and the terminal equipment. So that the terminal device can determine the frequency domain range of the first downlink time-frequency resource position for receiving the downlink data.

With reference to the foregoing possible implementation manner, in another possible implementation manner, before the network device sends the downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further includes: the network device sends at least one virtual sub-channel number to the terminal device. So that the terminal device can determine the frequency domain range of the second time-frequency resource position for receiving the downlink data.

With reference to the foregoing possible implementation manner, in another possible implementation manner, before the network device sends the downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further includes: the network device configures the corresponding relationship between the virtual sub-channel number and the uplink sub-channel number for the terminal device through the fixed channel, and the corresponding relationship between the virtual sub-channel number and the uplink sub-channel number contains time-related parameters. The terminal device uses the corresponding relation between different virtual sub-channel numbers and uplink sub-channel numbers at different moments, and determines different uplink sub-channel numbers according to the virtual sub-channel numbers at different moments, so that the uplink sub-channels used by the terminal device at different moments are different, and the terminal device can transmit data to the network device in a frequency hopping mode.

With reference to the foregoing possible implementation manner, in another possible implementation manner, before the network device sends the downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further includes: the network equipment determines the time when the terminal equipment uses the channels, wherein the channels comprise all downlink channels used by the network equipment for sending downlink data to the terminal equipment and all uplink sub-channels used by the terminal equipment for sending uplink data to the network equipment. Therefore, the interference generated by collision between the uplink data sent by the terminal equipment to the network equipment and the uplink data sent by other terminal equipment to the network equipment is avoided.

With reference to the foregoing possible implementation manner, in another possible implementation manner, if the available duration of the uplink sub-channel corresponding to at least one uplink sub-channel number used by the terminal device is smaller than the available duration of the first downlink channel corresponding to the first downlink channel number, the network device sends a second indication to the terminal device, where the second indication is used to indicate the terminal device to perform frequency hopping within the frequency range of the first downlink channel. Therefore, the terminal equipment can make full use of frequency resources to carry out frequency hopping, the utilization rate of the resources can be improved, and the anti-interference performance can be improved.

In a third aspect of the embodiments of the present invention, there is provided a communication apparatus, including: a processing unit, configured to determine at least one downlink time-frequency resource location transmitted in a frequency hopping manner; a receiving unit, configured to receive downlink data sent by a network device at a first downlink time-frequency resource location of at least one downlink time-frequency resource location; the processing unit is further configured to determine a first frequency domain range, where the first frequency domain range is the same as a frequency domain range of the first downlink time-frequency resource location; the processing unit is further configured to determine a frequency domain range of a second time-frequency resource location, where the frequency domain range of the second time-frequency resource location is the same as the first frequency domain range or within the first frequency domain range; and the sending unit is used for sending the uplink data to the network equipment at the second time-frequency resource position.

In a fourth aspect of the embodiments of the present application, there is provided a communication apparatus, including: a sending unit, configured to send downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, where the at least one downlink time-frequency resource location includes a first downlink time-frequency resource location; a receiving unit, configured to receive uplink data sent by the terminal device at a second time-frequency resource location, where a frequency domain range of the second time-frequency resource location is the same as the first frequency domain range, or the first frequency domain range is the same as the frequency domain range of the first downlink time-frequency resource location within the first frequency domain range, and the first downlink time-frequency resource location is a resource used by the terminal device to receive downlink data.

It should be noted that the functional modules in the third aspect and the fourth aspect may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions. For example a transceiver for performing the functions of the receiving unit and the transmitting unit, a processor for performing the functions of the processing unit, and a memory for the processor to process the program instructions of the data transmission method of the embodiments of the present application. The processor, transceiver and memory are connected by a bus and communicate with each other. Specifically, reference may be made to a function of behavior of a terminal device in the data transmission method provided in the first aspect, and a function of behavior of a network device in the data transmission method provided in the second aspect.

In a fifth aspect, an embodiment of the present application provides a communication apparatus, including: a processor, a memory, a bus, and a communication interface; the memory is used for storing computer-executable instructions, the processor is connected with the memory through the bus, and when the processor runs, the processor executes the computer-executable instructions stored in the memory so as to enable the communication device to execute the method of any aspect.

In a sixth aspect, embodiments of the present application provide a computer-readable storage medium for storing computer software instructions for the communication apparatus, which when executed on a computer, enable the computer to perform the method of any of the above aspects.

In a seventh aspect, embodiments of the present application provide a computer program product containing instructions, which when executed on a computer, enable the computer to perform the method of any of the above aspects.

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

In the embodiments of the present application, the names of the communication devices do not limit the devices themselves, and in practical implementations, the devices may appear by other names. Provided that the function of each device is similar to the embodiments of the present application, and fall within the scope of the claims of the present application and their equivalents.

These and other aspects of the embodiments of the present application will be more readily apparent from the following description of the embodiments.

Drawings

FIG. 1 is a schematic diagram of a frequency hopping pattern provided by the prior art;

fig. 2 is a schematic diagram of an uplink hopping pattern and a downlink hopping pattern provided in the prior art;

fig. 3 is a simplified schematic diagram of a communication system provided by an embodiment of the present application;

fig. 4 is a schematic view of a scenario in which a network device is an NR-NB according to an embodiment of the present application;

fig. 5 is a schematic view of a scenario in which a network device is CU-DU separation according to an embodiment of the present disclosure;

fig. 6 is a schematic composition diagram of a network device according to an embodiment of the present application;

fig. 7 is a schematic composition diagram of a terminal device according to an embodiment of the present application;

fig. 8 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a method for determining downlink channel numbers according to an embodiment of the present application;

fig. 10 is a schematic diagram of a downlink channel number calculation method according to an embodiment of the present application;

fig. 11 is a schematic diagram illustrating a method for determining an uplink subchannel number according to an embodiment of the present application;

fig. 12 is a schematic diagram illustrating a method for calculating an uplink subchannel number according to an embodiment of the present application;

fig. 13 is a schematic diagram illustrating a correspondence relationship between a virtual subchannel number and an uplink subchannel number according to an embodiment of the present application;

fig. 14 is a schematic diagram of an uplink hopping pattern and a downlink hopping pattern according to an embodiment of the present application;

fig. 15 is a flowchart of another data transmission method according to an embodiment of the present application;

fig. 16 is a schematic diagram illustrating a communication device according to an embodiment of the present application;

fig. 17 is a schematic diagram of another communication device according to an embodiment of the present application;

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

fig. 19 is a schematic composition diagram of another communication device according to an embodiment of the present application.

Detailed Description

According to the international spectrum white paper released recently by FCC, it can be seen that the unlicensed spectrum resources are greater than the licensed spectrum resources, and if the unlicensed spectrum can be effectively utilized, the spectrum efficiency of wireless communication is certainly and greatly improved. Currently, the main technology used on unlicensed spectrum is Wireless Fidelity (WiFi) technology, but WiFi has drawbacks in mobility, security, Quality of Service (QoS) and handling multi-user scheduling simultaneously. Therefore, the MulteFire alliance provides a MulteFire technology capable of operating in an unlicensed spectrum based on a Long-term Evolution (LTE) technology, and provides a more effective wireless access by using unlicensed spectrum resources, thereby meeting the increasing demand of mobile broadband services. In addition, various countries have enacted different regulations in order to ensure fair use of the spectrum. For example, as shown in table 1, European Telecommunications Standards Institute (ETSI) imposes the following constraints on devices using the 2.4GHz band in the spectrum code ETSI EN 300328.

TABLE 1

Among these, from table 1, it is possible to obtain: european regulations divide the devices in use into FHSS devices and broadband Modulation (Wideband Modulation) devices, and further refine them into Adaptive (Adaptive) devices and Non-Adaptive (Non-Adaptive) devices, and different types of devices are subject to different regulations. For example, for a Listen Before Talk (LBT) based detection backoff (Detect And audio, DAA) adaptive FESS device, it is required to satisfy the limitations that the Output power (Output power) is less than or equal to 20dBm, the transmission time (Tx time) is not greater than 60ms, the Number of channels (Number of channels) is greater than or equal to 15, the frequency hopping spreading (FH separation) is greater than or equal to 100KHz, And 18us Clear Channel Assessment (CCA) is required. For another example, for a non-adaptive FESS-based device, the output power is less than or equal to 20dBm, the Medium Utilization (MU) rate is not greater than 10%, the single transmission time is not greater than 5ms, the Accumulated transmission time (Accumulated time) is not greater than 15ms, the Occupied channel bandwidth of one channel (Occupied channel) is less than or equal to 5MHz, and the transmission interval (Tx gap) is greater than or equal to 5 ms. MU is defined as MU (P/100mW) × DC, where P is the output power and DC is the duty cycle, and MU < 10% when P is 100mW and DC < 10%. For another example, for the DAA adaptive wideband modulation device Based on LBT, the output power is less than or equal to 20dBm, PSD is less than or equal to 10dBm/MHz, and the transmission time is less than 10ms (for Frame-Based Equipment (FBE)) or less than or equal to 13ms (for Load-Based Equipment (LBE)) limitations need to be satisfied. Where max (a, b) represents taking the maximum of a and b.

The FCC spectrum regulations are relatively less restrictive than the ETSI spectrum regulations, as shown in table 2.

TABLE 2

Among these, from table 2, it can be obtained: in the U.S. regulations, for digital modulation (digital modulation) devices, it is necessary to meet the limitations that Each channel Bandwidth (Bandwidth/reach channel) is greater than 500kHz, PSD is 8dBm/3kHz, transmission Power (or called conducted Power) does not exceed 30dBm, and Equivalent Isotropic Radiated Power (EIRP) is less than 36 dBm. For FHSS devices with no less than 15 channels, the Dwell time (Dwell time) of Each channel is less than 0.4s/(0.4s × N), where N is the number of channels and the transmit power is less than 21 dBm. For FHSS devices with the number of channels not less than 75, the limitation of transmitting power greater than 30dBm is required. In addition, in the U.S. regulations, a mode allowing a mixture of digital modulation and FHSS, i.e., a device may include two operating modes, when operating in the digital modulation mode, the constraint corresponding to the digital modulation system, i.e., PSD is limited to 8dBm/3KHz, transmit power does not exceed 30dBm, etc., is observed, and when operating in the FHSS mode, the constraint corresponding to the FHSS system, i.e., transmit power needs to be less than 21dBm (number of channels is not less than 15) or 30dBm (number of channels is not less than 75), is observed.

In addition, with the continuous development of communication technology, both the narrowband Internet of Things (NB-IoT) and the eMTC system based on cellular have become important branches of the Internet of everything. An eMTC-U communication technology is specified in MulteFire 1.1, the eMTC-U is a machine type communication technology working on an unauthorized frequency spectrum, and the eMTC-U communication technology is mainly used for achieving long-distance, low-cost and low-power-consumption Internet of things communication. The frequency hopping communication is a branch of spread spectrum communication, and both the transmitting and receiving parties of the communication adopt a communication mode of synchronously changing the carrier frequency by the same frequency hopping pattern when transmitting data, so that the communication system has strong anti-interference performance. For example, bluetooth uses an Industrial Scientific Medical (ISM) frequency band of 2.4GHz, and is divided into 79 channels from 2.402GHz to 2.480GHz, each channel has a bandwidth of 1MHz, and an average hopping rate of 1600 hops/sec. As shown in fig. 1, a schematic diagram of a frequency hopping pattern provided in the prior art is shown, where CH0 is a fixed channel (Anchor channel), and CH1 to CHN are channels that can be used by both transceivers of communication using a frequency hopping spread spectrum technique for communication. Therefore, when sending data to the base station, the terminal of the eMTC system uses non-adaptive frequency hopping, the main working frequency point is 2.4GHz, the system bandwidth is 1.4MHz, and of course, the terminal can also be extended to other unlicensed frequency spectrums, such as sub1GHz including 315MHz, 433MHz, 868MHz, 915MHz, and the like. A frequency hopping or broadband technology is used when a base station sends data to a terminal, and currently, in discussion, a downlink channel bandwidth used for sending downlink data is 1.4MHz, 5MHz, 10MHz, or 20 MHz. In order to reduce the Synchronization time and power consumption, a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Master Information Block (MIB) are transmitted in one or several channels of fixed frequency, such as a fixed Channel (CH), which may be CH 0. As shown in fig. 2, in a schematic diagram of an uplink hopping pattern and a downlink hopping pattern provided in the prior art, taking a downlink 5MHz bandwidth and an uplink 1.4MHz bandwidth as an example, when a base station performs data transmission, a base station performs pseudo-random frequency hopping according to a granularity of a channel bandwidth (e.g., 5MHz) of the base station, and a terminal performs pseudo-random frequency hopping according to a granularity of a channel bandwidth (e.g., 1.4MHz) of the terminal every 20 milliseconds (ms) of transmission. Therefore, if multiple terminals perform frequency hopping within the whole frequency band used by the base station to transmit uplink data to the base station, the multiple terminals occupy a wide frequency band in the frequency domain (for example, the bandwidth of the 2.4GHz band is 83.5MHz), which results in that the frequency band occupied by the multiple terminals for transmitting uplink data is larger than the frequency band occupied by the base station for transmitting downlink data, and it is difficult for the base station to receive uplink data transmitted by the multiple terminals within the whole frequency band, and at the same time, the purpose of reducing interference with other systems by the base station and the terminals through frequency hopping is violated, which affects the coexistence effect.

In order to solve the problem that when a terminal transmits uplink data in a frequency hopping mode, if frequency hopping is carried out in the whole frequency band and a base station needs to receive data of a plurality of terminals at the same time, the base station needs to have the capability of receiving the whole frequency band range at the same time; the coexistence of multiple channels, in which multiple terminals occupy the bandwidth of the entire frequency band at the same time, has a great influence on the systems. The embodiment of the application provides a data transmission method, and the basic principle is as follows: firstly, terminal equipment determines at least one downlink time-frequency resource position transmitted in a frequency hopping mode, then receives downlink data sent by network equipment at a first downlink time-frequency resource position of the at least one downlink time-frequency resource position, and determines a first frequency domain range according to the first downlink time-frequency resource position, wherein the first frequency domain range is the same as the frequency domain range of the first downlink time-frequency resource position; secondly, determining the frequency domain range of the second time frequency resource position, wherein the frequency domain range of the second time frequency resource position is the same as the first frequency domain range, or in the first frequency domain range, and finally, the terminal equipment sends uplink data to the network equipment at the second time frequency resource position. In the data transmission method according to the embodiment of the present application, before the terminal device sends uplink data to the network device in a frequency hopping manner, it needs to determine a frequency domain range of a first downlink time-frequency resource location for receiving downlink data, then, determining the frequency domain range of the second time frequency resource position used by the terminal device to send the uplink data to the network device, when the terminal equipment sends uplink data to the network equipment in a frequency hopping mode, the used second time frequency resource positions are all in the frequency domain range of the first downlink time frequency resource position, therefore, when a plurality of terminal devices transmit uplink data to the network device in the same frequency hopping mode, the network device can receive the uplink data transmitted by the plurality of terminals in a narrower frequency band, meanwhile, the method also meets the aim that the network equipment and the terminal equipment reduce the interference with other systems through frequency hopping.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 3 shows a simplified schematic diagram of a communication system to which embodiments of the present application may be applied. As shown in fig. 3, the system architecture may include: a plurality of terminal devices 11 and a network device 12. The terminal device communicates with the network device via a wireless communication technology.

Terminal device 11 may be a wireless terminal device, which may be a device that provides voice and/or data connectivity to a user, or a handheld device having wireless connection capability, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone), a computer, and a data card, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device that exchanges language and/or data with a Radio Access Network (e.g., a Radio Access Network, RAN), may communicate with one or more core networks or the internet. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal device may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a Subscriber Station (Subscriber Station, SS), a User Terminal device (Customer Premises Equipment, CPE), a User Equipment (User Equipment, UE), and so on. As an example, the terminal device shown in fig. 3 may be a machine type terminal device, such as a water meter, an electricity meter, and the like.

The network device 12 may be a Base Station (BS) or a Base Station controller (bsc) for wireless communication. Also referred to as wireless access points, transceiver stations, relay stations, cells, Transmit and Receive Ports (TRPs), and so on. Specifically, the network device 12 is a device deployed in a radio access network to provide a wireless communication function for the terminal device 11, and its main functions include one or more of the following functions: management of radio resources, compression of Internet Protocol (IP) headers and encryption of user data streams, selection of Mobility Management Entity (MME) when a user equipment is attached, routing of user plane data to Serving Gateway (SGW), organization and transmission of paging messages, organization and transmission of broadcast messages, configuration of measurement and measurement reports for Mobility or scheduling, and the like. Network devices 12 may include various forms of cellular base stations, home base stations, cells, wireless transmission points, macro base stations, micro base stations, relay stations, wireless access points, and so forth. In systems using different radio Access technologies, names of devices having network device functions may be different, for example, in the third Generation mobile communication technology (3G) system, called a base station (Node B), in the Long Term Evolution (LTE) system, called an evolved NodeB (eNB or eNodeB), in the fifth Generation mobile communication technology (5G) system, called a gNB, and in the wireless local Access system, called an Access point (Access point).

It should be noted that, for a 5G or New Radio Access Network (NR) system, under an NR base station (NR-NB or gnnb), one or more Transmission Reception Points (TRPs) may exist, all the TRPs belong to the same cell, and fig. 4 is a schematic view of a scenario in which a Network device provided in this embodiment is an NR-NB, where each TRP and a terminal device may use the measurement reporting method described in this embodiment.

In another scenario, the network device 12 may also be divided into a Control Unit (CU) and a Data Unit (DU), where multiple DUs may exist in one CU, and fig. 5 is a schematic view of a scenario in which the network device is separated into CUs and DUs according to this embodiment, where each DU and the terminal device may use the measurement reporting method according to this embodiment. The CU-DU separation scenario differs from the multi-TRP scenario in that the TRP is only a radio unit or an antenna device, whereas protocol stack functions, e.g. physical layer functions, may be implemented in the DU.

As communication technologies evolve, the names of network devices may change. Further, the network device 12 may be other apparatuses that provide the terminal device 11 with a wireless communication function, where possible. For convenience of description, in the embodiment of the present application, an apparatus for providing a wireless communication function for the terminal device 11 is referred to as a network device 12.

Fig. 6 is a schematic composition diagram of a network device according to an embodiment of the present application, and the network device 12 in fig. 3 may be implemented in a manner of a base station in fig. 6. As shown in fig. 6, the network device may include at least one processor 21, memory 22, transceiver 23, bus 24.

The following describes each component of the network device in detail with reference to fig. 6:

the processor 21 is a control center of the network device, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 21 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present Application, such as: one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). In this embodiment, the processor 21 may be configured to determine at least one downlink time-frequency resource location transmitted in a frequency hopping manner. The processor 21 may also be used for the time instants when the terminal device uses the channel.

The processor 21 may perform various functions of the network device by running or executing software programs stored in the memory 22, and calling up data stored in the memory 22, among other things.

In particular implementations, processor 21 may include one or more CPUs such as CPU0 and CPU1 shown in fig. 6 as one example.

In particular implementations, network device may include multiple processors, such as processor 21 and processor 25 shown in FIG. 6, for example, as an example. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 22 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory 22 may be self-contained and coupled to the processor 21 via a bus 24. The memory 22 may also be integrated with the processor 21.

The memory 22 is used for storing software programs for implementing the scheme of the present invention, and is controlled by the processor 21 to execute.

A transceiver 23 for communicating with other devices or a communication network. Such as for communicating with communication Networks such as ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc. The transceiver 23 may include all or part of a baseband processor and may also optionally include an RF processor. The RF processor is used for transceiving RF signals, and the baseband processor is used for processing baseband signals converted from RF signals or baseband signals to be converted into RF signals. The transceiver 23 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function. In the embodiment of the present application, the transceiver 23 may be configured to transmit downlink data to the terminal device and receive uplink data transmitted by the terminal device. The transceiver 23 may be further configured to send the first indication, the second indication, the at least one virtual subchannel number, a correspondence between the virtual subchannel number and the uplink subchannel number, and at least one of a physical cell identifier, a downlink channel bandwidth, an available channel list, and a minimum channel number to the terminal device.

The bus 24 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.

The device architecture shown in fig. 6 does not constitute a limitation of network devices and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

Fig. 7 is a schematic composition diagram of a terminal device according to an embodiment of the present application, and the terminal device 11 in fig. 3 may be implemented in the manner of the terminal device in fig. 7. As shown in fig. 7, the terminal device may include at least one processor 31, a memory 32, a transceiver 33, and a bus 34.

The following specifically describes each constituent component of the terminal device with reference to fig. 7:

the processor 31 may be a single processor or may be a collective term for a plurality of processing elements. For example, the processor 31 may be a general-purpose CPU, an ASIC, or one or more integrated circuits for controlling the execution of the programs of the present application, such as: one or more DSPs, or one or more FPGAs. The processor 31 may perform various functions of the terminal device by running or executing software programs stored in the memory 32 and calling data stored in the memory 32, among others. In this embodiment of the present application, the processor 31 may be configured to determine at least one downlink time-frequency resource location transmitted in a frequency hopping manner, and the processor 31 may also be configured to determine frequency domain ranges of the first frequency domain range and the second time-frequency resource location.

In particular implementations, processor 31 may include one or more CPUs, as one embodiment. For example, as shown in FIG. 7, processor 31 includes a CPU0 and a CPU 1.

In particular implementations, a terminal device may include multiple processors, as one embodiment. For example, as shown in fig. 7, includes a processor 31 and a processor 35. Each of these processors may be a single-CPU or a multi-CPU. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

Memory 32 may be, but is not limited to, ROM or other type of static storage device that can store static information and instructions, RAM or other type of dynamic storage device that can store information and instructions, EEPROM, CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 32 may be self-contained and coupled to the processor 31 via a bus 34. The memory 32 may also be integrated with the processor 31.

A transceiver 33 for communicating with other devices or a communication network, such as ethernet, RAN, WLAN, etc. The transceiver 33 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function. In the embodiment of the present application, the transceiver 33 may be configured to receive downlink data sent by a network device, and the transceiver 33 may also be configured to send uplink data to the network device.

The bus 34 may be an ISA bus, a PCI bus, an EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.

The device architecture shown in fig. 7 does not constitute a limitation of the terminal device and may include more or fewer components than those shown, or some of the components may be combined, or a different arrangement of components. Although not shown, the terminal device may further include a battery, a camera, a bluetooth module, a Global Positioning System (GPS) module, a display screen, and the like, which are not described herein again.

Fig. 8 is a flowchart of a data transmission method provided in an embodiment of the present application, and as shown in fig. 8, the method may include:

401. and the network equipment transmits the downlink data on at least one downlink time-frequency resource position in a frequency hopping mode.

The network device sends downlink data to the terminal device by using a frequency hopping technology, that is, the network device needs to hop on a plurality of downlink channels in the process of sending the downlink data to the terminal device, and sends the downlink data to the terminal device by using different downlink channels at different times. The bandwidth of the downlink channel used by the network device to send the downlink data to the terminal device may be 1.4MHz, 5MHz, 10MHz, or 20MHz, that is, the hopping granularity may be 1.4MHz, 5MHz, 10MHz, or 20 MHz. It can be understood that the location of the downlink channel corresponds to the location of the frequency resource.

It should be noted that, before the network device sends downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, first, the network device needs to determine at least one downlink time-frequency resource location first. For example, as shown in fig. 9, the network device may determine the downlink time-Frequency resource location according to at least one of a frame number, a physical cell identifier, a downlink Channel bandwidth, an available Channel list (AFH _ Channel _ map), and a minimum Channel number. For different parameter values, the network device may determine different downlink time-frequency resource locations, and thus, the network device may determine at least one downlink time-frequency resource location. The network device should determine the downlink time-frequency resource location at least according to the frame number and the physical cell identifier. The frame number represents time information; the physical cell identifier represents a cell in which the terminal device currently resides, and the network device can obtain the physical cell identifier after the terminal device resides in the cell; the downlink channel bandwidth represents the system bandwidth; the available channel list comprises the states of channels used for data transmission between the network equipment and the terminal equipment; the minimum number of channels indicates the number of channels used for data transmission between the network device and the terminal device. Then, the network device configures the frame number, the physical cell identifier, the downlink channel bandwidth, the available channel list and the minimum channel number to the terminal device through the fixed channel, so that the terminal device can determine at least one downlink time-frequency resource position. Fig. 10 is a schematic diagram of a downlink channel number calculation method according to an embodiment of the present application. As shown in table 3, each parameter in the calculation process in fig. 10 is decomposed as follows.

TABLE 3

Input device	Value of
		T0[3：0]	Time stamp (TimeStamp) [ 4: 1]
A1[3：0]	Physical cell identity [ 3: 0]
		B[5：3]	Time stamp [ 10: 8]
B[2]	Exclusive OR (TimeStamp [7 ]]，TimeStamp[0])
		B[1]	Exclusive-OR (TimeStamp [6 ]]，TimeStamp[0])
B[0]	Exclusive-OR (TimeStamp [5 ]]，TimeStamp[0])
		C	16*TimeStamp[0]
A2[16：15]	Exclusive-OR (Timestamp [ 18: 17)]，PCI[5：4])
		A2[14：3]	TimeStamp[16：5]
A2[2：0]	3’b0
		D	TimeStamp[19]
E	Frame number (Frame number)
		F	Subframe number (Sub frame number)

The frame number occupies 20bits, the Physical Cell Identifier (PCI) is 0-503, the channel bandwidth is 0-3, the available channel list (AFH _ channel _ map) occupies 16bits, the identification information of the terminal device occupies 16bits, and the minimum channel number can be any value from 1 to 75.

In addition, in the frequency domain of one downlink channel, the network device may use different Physical Resource Blocks (PRBs) to transmit downlink data to different terminal devices. The network device further needs to configure, to the terminal device, a PRB used for transmitting Downlink data through a Physical Downlink Control Channel (PDCCH).

402. The terminal equipment determines at least one downlink time-frequency resource position transmitted in a frequency hopping mode.

After the network device sends downlink data to the terminal device on at least one downlink time-frequency resource location in a frequency hopping manner, the terminal device needs to determine at least one downlink time-frequency resource location transmitted in the frequency hopping manner before receiving the downlink data. For example, since the network device configures, to the terminal device, the frame number, the physical cell identifier, the downlink channel bandwidth, the available channel list, and the minimum channel number through the fixed channel, and the network device sends, to the terminal device, the PRB used for the downlink data, the terminal device may determine at least one downlink time-frequency resource location according to the frame number, the physical cell identifier, the downlink channel bandwidth, the available channel list, and the minimum channel number. The terminal equipment at least determines the position of the downlink time-frequency resource according to the frame number and the physical cell identifier.

403. And the terminal equipment receives downlink data sent by the network equipment at a first downlink time-frequency resource position of at least one downlink time-frequency resource position.

After the terminal device determines at least one downlink time-frequency resource location, downlink data sent by the network device is received at the first downlink time-frequency resource location, that is, the downlink data sent by the network device is received at a specific PRB used for transmitting the downlink. The at least one downlink time frequency resource location comprises a first downlink time frequency resource location. Of course, if the network device determines that the terminal device needs to receive the downlink data sent by the network device at the second downlink time-frequency resource location, the terminal device receives the downlink data sent by the network device at the second downlink time-frequency resource location. Note that the first time/frequency resource location does not include a fixed channel, and the frequency location of the fixed channel does not change, for example, CH0 is a fixed channel, and the fixed channel is used to transmit PSS, SSS, MIB, and the like.

404. The terminal device determines a first frequency domain range.

After the terminal device receives downlink data sent by the network device at a first downlink time-frequency resource position of at least one downlink time-frequency resource position, the terminal device needs to determine a first frequency domain range, the first frequency domain range is the same as the frequency domain range of the first downlink time-frequency resource position, and the terminal device determines the first frequency domain range, that is, determines the frequency domain range of the first downlink time-frequency resource position. Since the frequency domain range of at least one downlink time-frequency resource location may be indicated by a corresponding downlink channel number, the frequency domain range of the first downlink time-frequency resource location may be indicated by the first downlink channel number, and thus, the terminal device may determine the frequency domain range of the first downlink time-frequency resource location by determining the first downlink channel number.

For example, the terminal device may determine the first frequency domain range according to the method shown in fig. 9 and fig. 10, that is, the first frequency domain range is determined according to at least one of a frame number, a physical cell identifier, a downlink channel bandwidth, an available channel list, and a minimum channel number. The terminal device should determine the first frequency domain range at least according to the frame number and the physical cell identifier. The terminal equipment can know the frame number after receiving the downlink data, and the frame number represents the moment when the terminal equipment receives the current downlink data; the physical cell identifier is used for indicating a cell in which the terminal device currently resides, and the terminal device can obtain the physical cell identifier after residing in the cell; the downlink channel bandwidth is used for representing the maximum bandwidth of downlink data sent by the network device to the terminal device, and the downlink channel bandwidth can be configured to the terminal device by the network device through signaling; the available channel list comprises the states of channels used for data transmission between the network equipment and the terminal equipment, and the available channel list can be configured to the terminal equipment by the network equipment through signaling; the minimum number of channels is used to indicate the number of channels used for data transmission between the network device and the terminal device, and the minimum number of channels may be configured to the terminal device by signaling by the network device or may be configured to the terminal device in advance as specified by a protocol. And then, the terminal equipment calculates to obtain a first downlink channel number according to at least one item of the frame number, the physical cell identifier, the downlink channel bandwidth, the available channel list and the minimum channel number.

405. And the terminal equipment determines the frequency domain range of the second time-frequency resource position.

After the terminal device determines the frequency domain range of the first downlink time-frequency resource location, the terminal device determines the frequency domain range of the second time-frequency resource location. The method for determining the frequency domain range of the second time-frequency resource position by the terminal device may include the following two ways:

in an implementation manner, the terminal device may determine the frequency domain range of the second time-frequency resource location according to a preset algorithm. Since the frequency domain range of at least one downlink time-frequency resource location may be indicated by a corresponding downlink channel number, and the frequency domain range of the second time-frequency resource location described herein may refer to the frequency domain ranges of a plurality of second time-frequency resource locations, similarly, the frequency domain range of the second time-frequency resource location may also be indicated by at least one uplink subchannel number. The terminal device determines at least one uplink subchannel number, which may be determined according to the frame number, the subframe number, and the identification information of the terminal device. The frame Number is a time when the terminal device receives downlink data, the terminal device may obtain a subframe Number through a Cell search process on a fixed channel, and the Identification information of the terminal device may be a Cell Radio Network Temporary Identifier (CRNTI) or an International Mobile Subscriber Identity (IMSI).

For example, fig. 11 is a schematic diagram of a method for determining an uplink sub-channel number according to an embodiment of the present application, where a terminal device may obtain a first downlink channel number according to a frame number, a physical cell identifier, a downlink channel bandwidth, an available channel list, and a minimum channel number, and then determine at least one uplink sub-channel number according to the frame number, the sub-frame number, and identification information of the terminal device. Fig. 12 is a schematic diagram illustrating a method for calculating an uplink subchannel number according to an embodiment of the present application. The decomposition of the parameters in the calculation process in fig. 12 is shown in table 3.

In another implementation manner, when the terminal device determines the frequency domain range of the second time-frequency resource location based on the scheduling of the network device, the network device may pre-configure, for the terminal device, a corresponding relationship between a virtual subchannel number and an uplink subchannel number through a fixed channel, where the corresponding relationship between the virtual subchannel number and the uplink subchannel number includes time-related parameters, that is, at different times, the corresponding relationship between the virtual subchannel number and the uplink subchannel number is different. The correspondence is a pseudo-random function related to time, and can be defined in advance by the protocol. Assuming that the network device and the terminal device calculate the position of the downlink channel corresponding to the 5MHz bandwidth first, then the network device indicates the virtual channel number used by each terminal device through the scheduling signaling (the 5MHz bandwidth may correspond to 4 sub-bands, each sub-band corresponds to a virtual channel), and the network device and the terminal device correspond to the actual physical channel number through the correspondence defined by the protocol (satisfying the pseudo-random requirement). And the terminal equipment transmits data at the frequency position corresponding to the actual physical channel number. For example, as shown in fig. 13, the corresponding relationship between the virtual subchannel number and the uplink subchannel number is illustrated. At time T1, virtual subchannel No. 1 corresponds to uplink subchannel No. 2, virtual subchannel No. 2 corresponds to uplink subchannel No. 1, virtual subchannel No. 3 corresponds to uplink subchannel No. 4, and virtual subchannel No. 4 corresponds to uplink subchannel No. 3; at time T2, virtual subchannel No. 1 corresponds to uplink subchannel No. 4, virtual subchannel No. 2 corresponds to uplink subchannel No. 2, virtual subchannel No. 3 corresponds to uplink subchannel No. 1, and virtual subchannel No. 4 corresponds to uplink subchannel No. 3. After the terminal equipment receives at least one virtual subchannel number sent by the network equipment, the terminal equipment inquires the corresponding relation between the virtual subchannel number and the uplink subchannel number according to the at least one virtual subchannel number, and determines at least one uplink subchannel number.

It should be noted that the frequency domain range of the second time-frequency resource location may be the same as the first frequency domain range, or within the first frequency domain range. For example, when the uplink channel bandwidth is 1.4MHz and the downlink channel bandwidth is 1.4MHz, the frequency domain range of the second time-frequency resource location may be the same as the first frequency domain range; and when the bandwidth of the uplink channel is 1.4MHz and the bandwidth of the downlink channel is 5MHz, the frequency domain range of the second time-frequency resource position is in the first frequency domain range.

406. And the terminal equipment sends uplink data to the network equipment at the second time-frequency resource position.

And after determining the frequency domain range of the second time frequency resource position, the terminal equipment sends uplink data to the network equipment at the second time frequency resource position.

407. And the network equipment receives the uplink data sent by the terminal equipment at the second time-frequency resource position.

And after the terminal equipment sends the uplink data to the network equipment on the second time-frequency resource position, the network equipment receives the uplink data sent by the terminal equipment on the second time-frequency resource position. The frequency domain range of the second time-frequency resource position is the same as the first frequency domain range, or the first frequency domain range is the same as the frequency domain range of the first downlink time-frequency resource position in the first frequency domain range, and the first downlink time-frequency resource position is a resource used by the network device to send downlink data to the terminal device.

For example, fig. 14 is a schematic diagram of an uplink hopping pattern and a downlink hopping pattern provided in this embodiment of the present application, where it is assumed that a downlink channel bandwidth is 5MHZ, a transmission duration is 20ms, an uplink sub-channel bandwidth is 1.4MHZ, and a transmission duration is 5ms, where terminal devices 1 to 8 perform frequency hopping within a frequency domain of the downlink channel bandwidth according to the data transmission method described in this embodiment of the present application, and send uplink data to a network device, that is, uplink sub-channels are all within the range of the downlink channel bandwidth.

In the data transmission method according to the embodiment of the present application, before the terminal device sends uplink data to the network device in a frequency hopping manner, it needs to determine a frequency domain range of a first downlink time-frequency resource location for receiving downlink data, then, determining the frequency domain range of the second time frequency resource position used by the terminal device to send the uplink data to the network device, when the terminal equipment sends uplink data to the network equipment in a frequency hopping mode, the used second time frequency resource positions are all in the frequency domain range of the first downlink time frequency resource position, therefore, when a plurality of terminal devices transmit uplink data to the network device in the same frequency hopping mode, the network device can receive the uplink data transmitted by the plurality of terminals in a narrower frequency band, meanwhile, the method also meets the aim that the network equipment and the terminal equipment reduce the interference with other systems through frequency hopping.

In addition, after the terminal device determines the frequency domain range of the second time-frequency resource position, if the terminal device uses the available time length of the uplink sub-channel corresponding to at least one uplink sub-channel number to be smaller than the available time length of the first downlink channel corresponding to the first downlink channel number, the terminal device performs frequency hopping in the frequency range of the first downlink channel to send uplink data to the network device, the first downlink channel is a channel in which the terminal device receives the downlink data sent by the network device, and the frequency domain range of the first downlink time-frequency resource position indicated by the first downlink channel number is the first downlink channel; similarly, the frequency domain range of the second time-frequency resource position indicated by the uplink subchannel number is the uplink subchannel. For example, assuming that the maximum duration of each data transmission by the terminal device is 5ms and then stops for 5ms, the terminal device stays on the downlink channel for a duration of 30ms at most. As shown in fig. 14, if the length of the stay of the terminal device 1 for transmitting data on the first uplink sub-channel (shown in the first row in fig. 14) is less than 5ms, that is, the stay of the terminal device 1 for transmitting data on the current 5MHz downlink channel is less than 30ms, the terminal device 1 may perform frequency hopping once again in the 5MHz downlink channel, and the terminal device 1 transmits data on the second uplink sub-channel (shown in the second row in fig. 14).

It should be noted that, since the channel division of the cellular communication system is determined by the network device and notified to the terminal device, the network device always knows which frequency bands belong to the frequency domain range of the UpLink channel and which frequency bands belong to the frequency domain range of the Downlink channel in the frequency domain, regardless of UpLink (UL) transmission (the terminal device is the transmitting end and the network device is the receiving end) or Downlink (DL) transmission (the network device is the transmitting end and the terminal device is the receiving end). Thus, the terminal device determines that the frequency domain ranges of the second time-frequency resource locations are all indicated by the network device. Therefore, as shown in fig. 15, in step 401, before the network device sends downlink data to the terminal device on at least one downlink time-frequency resource location in a frequency hopping manner, the embodiment of the present application may further include the following steps:

408. and the network equipment sends the physical cell identification, the downlink channel bandwidth, the available channel list and the minimum channel number to the terminal equipment.

The network equipment sends at least one of a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number to the terminal equipment. Therefore, the terminal equipment can calculate and obtain the frequency domain range of the downlink time-frequency resource position for receiving the downlink data according to the physical cell identification, the downlink channel bandwidth, the available channel list and the minimum channel number. The physical cell identifier is used to indicate a cell in which the terminal device is located, the downlink channel bandwidth is used to indicate a maximum bandwidth for the network device to send downlink data to the terminal device, and the available channel list includes a state of a channel used for data transmission between the network device and the terminal device.

409. And the terminal equipment receives the physical cell identification, the downlink channel bandwidth, the available channel list and the minimum channel number sent by the network equipment.

410. The network equipment sends at least one virtual sub-channel number to the terminal equipment, and configures the corresponding relation between the virtual sub-channel number and the uplink sub-channel number for the terminal equipment through a fixed channel.

The corresponding relationship between the virtual subchannel number and the uplink subchannel number includes time-related parameters, so that the terminal device determines a second time-frequency resource location used for sending uplink data to the network device.

411. The terminal equipment receives at least one virtual sub-channel number sent by the network equipment, and configures the corresponding relation between the virtual sub-channel number and the uplink sub-channel number for the terminal equipment through a fixed channel.

The interference generated by collision between the uplink data sent by the terminal equipment to the network equipment and the uplink data sent by other terminal equipment to the network equipment is avoided. The method can also comprise the following steps:

412. the network device may also determine the time at which the terminal device uses the channel.

The channels include all downlink channels used by the network device to send downlink data to the terminal device, and all uplink sub-channels used by the terminal device to send uplink data to the network device.

If the available duration of the uplink subchannel corresponding to at least one uplink subchannel number used by the terminal device is less than the available duration of the first downlink channel corresponding to the first downlink channel number, the method may further include the following steps:

413. the network device sends the first indication and the second indication to the terminal device.

The first indication is used for indicating the time frequency resource used by the terminal equipment for sending the uplink data to the network equipment at the second time frequency resource position. So that the terminal device determines the second time-frequency resource position for sending the uplink data to the network device. Or, the first indication is used to indicate a time resource used by the terminal device to send uplink data to the network device at the second time-frequency resource position. Therefore, the terminal equipment determines the second time resource position for sending the uplink data to the network equipment, and the terminal equipment calculates and determines the frequency domain resource through a pre-defined frequency hopping calculation method.

The second indication is used for instructing the terminal device to frequency hop within the frequency range of the first downlink channel. The first downlink channel is a channel used by the terminal device for receiving downlink data, and the frequency domain range of at least one uplink sub-channel is within the frequency domain range of the first downlink channel.

414. The terminal equipment receives the first indication and the second indication sent by the network equipment.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It will be appreciated that each network element, e.g. a communication device, comprises corresponding hardware structures and/or software modules for performing each function in order to implement the above-described functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

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

In the case of dividing each functional module by corresponding functions, fig. 16 shows a possible composition diagram of the communication apparatus described above and referred to in the embodiment, and as shown in fig. 16, the communication apparatus 50 may include: a processing unit 501, a receiving unit 502 and a transmitting unit 503.

The processing unit 501 is configured to support the communication device to execute steps 402, 404, and 405 in the data transmission method shown in fig. 8, and steps 402, 404, and 405 in the data transmission method shown in fig. 15.

A receiving unit 502, configured to support the communication device to perform step 403 in the data transmission method shown in fig. 8, and steps 409, 411, 414, and 404 in the data transmission method shown in fig. 15.

A sending unit 503, configured to support the communication device to execute step 406 in the data transmission method shown in fig. 8, and step 406 in the data transmission method shown in fig. 15.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

The communication device provided by the embodiment of the application is used for executing the data transmission method, so that the same effect as the data transmission method can be achieved.

In the case of an integrated unit, fig. 17 shows another possible schematic composition of the communication device referred to in the above-described embodiment. As shown in fig. 17, the communication device 60 includes: a processing module 601 and a communication module 602.

The processing module 601 is configured to control and manage actions of the communication apparatus, for example, the processing module 601 is configured to support the communication apparatus to perform steps 402, 404, 405 in the terminal device shown in fig. 8, steps 402, 404, 405 in the data transmission method shown in fig. 15, and/or other processes for the technology described herein. The communication module 602 is used to support communication between the communication apparatus and other network entities, for example, communication with the network device shown in fig. 3. The communication device may further comprise a memory module 603 for storing program codes and data of the communication device.

The processing module 601 may be a processor or a controller. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication module 602 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 603 may be a memory.

When the processing module 601 is a processor, the communication module 602 is a communication interface, and the storage module 603 is a memory, the communication device according to the embodiment of the present application may be the terminal device shown in fig. 7.

In the case of dividing each functional module by corresponding functions, fig. 18 shows a possible composition diagram of the communication device described above and referred to in the embodiment, and as shown in fig. 18, the communication device 70 may include: transmitting section 701 and receiving section 702.

The sending unit 701 is configured to support the communication device to execute step 401 in the data transmission method shown in fig. 8. For supporting the communication device to perform steps 401, 408, 410, 413 of the data transmission method shown in fig. 15.

A receiving unit 702, configured to support the communication device to execute step 407 in the data transmission method shown in fig. 8, and step 407 in the data transmission method shown in fig. 15.

In this embodiment, further, as shown in fig. 18, the terminal device may further include: a processing unit 703. A processing unit 703 for enabling the communication device to execute step 412 in the data transmission method shown in fig. 15.

In the case of an integrated unit, fig. 19 shows another possible schematic composition of the communication device referred to in the above-described embodiment. As shown in fig. 19, the communication device 80 includes: a processing module 801 and a communication module 802.

The processing module 801 is used for controlling and managing the operation of the communication device. The communication module 802 is used to support communication between the communication apparatus and other network entities, for example, communication with the terminal device shown in fig. 3. The communication device may also include a storage module 803 for storing program codes and data for the communication device.

The processing module 801 may be a processor or a controller, among others. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication module 802 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 803 may be a memory.

When the processing module 801 is a processor, the communication module 802 is a transceiver, and the storage module 803 is a memory, the communication apparatus according to the embodiment of the present application may be a network device shown in fig. 6.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

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

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method of data transmission, comprising:

the terminal equipment determines at least one downlink time-frequency resource position transmitted in a frequency hopping mode;

the terminal equipment receives downlink data sent by the network equipment at a first downlink time-frequency resource position of the at least one downlink time-frequency resource position;

the terminal equipment determines a first frequency domain range, wherein the first frequency domain range is the same as the frequency domain range of the first downlink time-frequency resource position;

the terminal equipment determines the frequency domain range of a second time-frequency resource position, wherein the frequency domain range of the second time-frequency resource position is the same as the first frequency domain range or is in the first frequency domain range;

the terminal equipment sends uplink data to the network equipment at the second time-frequency resource position;

wherein, the frequency domain range of the at least one downlink time-frequency resource position is respectively indicated by corresponding downlink channel numbers.

2. The method according to claim 1, wherein the determining, by the terminal device, the first frequency domain range specifically includes:

the terminal device determines at least one of a frame number, a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number, wherein the frame number is used for indicating the time when the terminal device receives the downlink data, the physical cell identifier is used for indicating a cell where the terminal device is located, the downlink channel bandwidth is used for indicating the maximum bandwidth when the network device sends the downlink data to the terminal device, the available channel list comprises the state of channels used for data transmission between the network device and the terminal device, and the minimum channel number is used for indicating the number of channels used for data transmission between the network device and the terminal device;

and the terminal equipment obtains a first downlink channel number according to at least one of the frame number, the physical cell identifier, the downlink channel bandwidth, the available channel list and the minimum channel number determined by the terminal equipment, wherein the first downlink channel number is used for indicating the first frequency domain range.

3. The method according to claim 1 or 2, wherein the determining, by the terminal device, the frequency domain range of the second time-frequency resource location specifically includes:

the terminal equipment determines the frequency domain range of the second time-frequency resource position according to a preset algorithm; alternatively, the first and second electrodes may be,

and the terminal equipment determines the frequency domain range of the second time-frequency resource position based on the scheduling of the network equipment.

4. The method according to claim 3, wherein the determining, by the terminal device, the frequency domain range of the second time-frequency resource location according to a preset algorithm specifically includes:

and the terminal equipment determines at least one uplink subchannel number, wherein the at least one uplink subchannel number is used for indicating the frequency domain range of the second time-frequency resource position.

5. The method according to claim 4, wherein the determining, by the terminal device, at least one uplink subchannel number specifically comprises:

and the terminal equipment determines the at least one uplink sub-channel number according to the frame number, the subframe number and the identification information of the terminal equipment.

6. The method of claim 4, wherein before the terminal device determines the at least one uplink sub-channel number, the method further comprises:

and the terminal equipment receives at least one virtual sub-channel number sent by the network equipment.

7. The method according to claim 6, wherein the determining, by the terminal device, the at least one uplink subchannel number specifically comprises:

and the terminal equipment determines the at least one uplink subchannel number according to the at least one virtual subchannel number and the corresponding relation between the virtual subchannel number and the uplink subchannel number, wherein the corresponding relation between the virtual subchannel number and the uplink subchannel number comprises time-related parameters.

8. The method of claim 7, wherein the mapping relationship between the virtual subchannel number and the uplink subchannel number is pre-configured for the terminal device by the network device through a fixed channel.

9. The method according to any one of claims 4 to 8, wherein the terminal device sends uplink data to the network device in the second time-frequency resource location, specifically including:

and if the available time length of the uplink subchannel corresponding to at least one uplink subchannel number used by the terminal equipment is less than the available time length of the first downlink channel corresponding to the first downlink channel number, the terminal equipment performs frequency hopping in the frequency range of the first downlink channel and sends uplink data to the network equipment.

10. A method of data transmission, comprising:

the network equipment sends downlink data on at least one downlink time-frequency resource position in a frequency hopping mode, wherein the at least one downlink time-frequency resource position comprises a first downlink time-frequency resource position;

the network device receives uplink data sent by a terminal device at a second time-frequency resource position, wherein the frequency domain range of the second time-frequency resource position is the same as a first frequency domain range, or the first frequency domain range is the same as the frequency domain range of a first downlink time-frequency resource position in the first frequency domain range, and the first downlink time-frequency resource position is a resource used by the network device for sending downlink data to the terminal device;

11. The method of claim 10, wherein before the network device receives uplink data sent by a terminal device in a second time-frequency resource location, the method further comprises:

and the network equipment sends a first indication to the terminal equipment, wherein the first indication is used for indicating the time frequency resources used by the terminal equipment for sending uplink data to the network equipment on the second time frequency resource position.

12. The method according to claim 10 or 11, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

and the network equipment determines the position of the at least one downlink time-frequency resource transmitted in a frequency hopping mode.

13. The method of claim 12, wherein the frequency domain ranges of the at least one downlink time-frequency resource location are respectively indicated by corresponding downlink channel numbers.

14. The method of claim 10, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

the network equipment sends at least one of a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number to the terminal equipment, wherein the physical cell identifier is used for indicating a cell where the terminal equipment is located, the downlink channel bandwidth is used for indicating the maximum bandwidth of downlink data sent to the terminal equipment by the network equipment, and the available channel list comprises the state of a channel used for data transmission between the network equipment and the terminal equipment.

15. The method of claim 13, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

16. The method of claim 10, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

the network device sends at least one virtual sub-channel number to the terminal device.

17. The method of claim 13, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

18. The method of claim 16, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

the network device configures a corresponding relationship between a virtual subchannel number and an uplink subchannel number for the terminal device through a fixed channel, wherein the corresponding relationship between the virtual subchannel number and the uplink subchannel number includes time-related parameters.

19. The method of claim 18, wherein before the network device transmits downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, the method further comprises:

the network device determines a time when the terminal device uses a channel, where the channel includes all downlink channels used by the network device to send downlink data to the terminal device and all uplink sub-channels used by the terminal device to send uplink data to the network device.

20. The method of claim 19, wherein if the available duration of the uplink sub-channel corresponding to at least one uplink sub-channel number used by the terminal device is less than the available duration of the first downlink channel corresponding to the first downlink channel number, the network device sends a second indication to the terminal device, and the second indication is used for indicating the terminal device to perform frequency hopping within the frequency range of the first downlink channel.

21. A communications apparatus, comprising:

a processing unit, configured to determine at least one downlink time-frequency resource location transmitted in a frequency hopping manner;

a receiving unit, configured to receive downlink data sent by a network device at a first downlink time-frequency resource location of the at least one downlink time-frequency resource location; wherein, the frequency domain range of the at least one downlink time-frequency resource position is respectively indicated by corresponding downlink channel numbers;

the processing unit is further configured to determine a first frequency domain range, where the first frequency domain range is the same as a frequency domain range of the first downlink time-frequency resource location;

the processing unit is further configured to determine a frequency domain range of a second time-frequency resource location, where the frequency domain range of the second time-frequency resource location is the same as the first frequency domain range or within the first frequency domain range;

and a sending unit, configured to send uplink data to the network device in the second time-frequency resource location.

22. The communications device according to claim 21, wherein the processing unit is specifically configured to:

determining at least one of a frame number, a physical cell identifier, a downlink channel bandwidth, an available channel list and a minimum channel number, wherein the frame number is used for indicating the time when terminal equipment receives the downlink data, the physical cell identifier is used for indicating a cell where the terminal equipment is located, the downlink channel bandwidth is used for indicating the maximum bandwidth when the network equipment sends the downlink data to the terminal equipment, the available channel list comprises the state of channels used for data transmission between the network equipment and the terminal equipment, and the minimum channel number is used for indicating the number of channels used for data transmission between the network equipment and the terminal equipment;

and obtaining a first downlink channel number according to at least one of the frame number, the physical cell identifier, the downlink channel bandwidth, the available channel list and the minimum channel number determined by the terminal equipment, wherein the first downlink channel number is used for indicating the first frequency domain range.

23. The communication device according to claim 21 or 22, wherein the processing unit is specifically configured to:

determining the frequency domain range of the second time frequency resource position according to a preset algorithm; alternatively, the first and second electrodes may be,

determining a frequency domain range of the second time-frequency resource location based on the scheduling of the network device.

24. The communications device according to claim 23, wherein the processing unit is specifically configured to:

determining at least one uplink subchannel number, wherein the at least one uplink subchannel number is used for indicating a frequency domain range of the second time-frequency resource position.

25. The communications device according to claim 24, wherein the processing unit is specifically configured to:

and determining the at least one uplink sub-channel number according to the frame number, the subframe number and the identification information of the terminal equipment.

26. The communications apparatus as claimed in claim 24, wherein the receiving unit is further configured to:

and receiving at least one virtual sub-channel number transmitted by the network equipment.

27. The communications device according to claim 26, wherein the processing unit is specifically configured to:

determining the at least one uplink subchannel number according to the at least one virtual subchannel number and the corresponding relationship between the virtual subchannel number and the uplink subchannel number, wherein the corresponding relationship between the virtual subchannel number and the uplink subchannel number comprises time-related parameters.

28. The apparatus according to claim 27, wherein the correspondence between the virtual sub-channel number and the uplink sub-channel number is pre-configured for the terminal device by the network device through a fixed channel.

29. The communications device according to any one of claims 24-28, wherein the processing unit is further configured to:

and if the available duration of the uplink sub-channel corresponding to at least one uplink sub-channel number is smaller than the available duration of the first downlink channel corresponding to the first downlink channel number, performing frequency hopping in the frequency range of the first downlink channel, and sending uplink data to the network equipment.

30. A communications apparatus, comprising:

a sending unit, configured to send downlink data on at least one downlink time-frequency resource location in a frequency hopping manner, where the at least one downlink time-frequency resource location includes a first downlink time-frequency resource location; wherein, the frequency domain range of the at least one downlink time-frequency resource position is respectively indicated by corresponding downlink channel numbers;

a receiving unit, configured to receive uplink data sent by a terminal device at a second time-frequency resource location, where a frequency domain range of the second time-frequency resource location is the same as a first frequency domain range, or the first frequency domain range is the same as a frequency domain range of a first downlink time-frequency resource location, and the first downlink time-frequency resource location is a resource used by a network device to send downlink data to the terminal device.

31. The communication device of claim 30,

the sending unit is further configured to send a first indication to the terminal device, where the first indication is used to indicate a time-frequency resource used by the terminal device to send uplink data to the network device at the second time-frequency resource location.

32. The communication apparatus according to claim 30 or 31, wherein the network device further comprises:

and the processing unit is used for determining the position of the at least one downlink time-frequency resource transmitted in a frequency hopping mode.

33. The communications apparatus as claimed in claim 32, wherein the frequency domain ranges of the at least one downlink time-frequency resource location are respectively indicated by corresponding downlink channel numbers.

34. The communication device of claim 30,

the sending unit is further configured to send at least one of a physical cell identifier, a downlink channel bandwidth, an available channel list, and a minimum channel number to the terminal device, where the physical cell identifier is used to indicate a cell where the terminal device is located, the downlink channel bandwidth is used to indicate a maximum bandwidth for the network device to send downlink data to the terminal device, and the available channel list includes a state of a channel used for data transmission between the network device and the terminal device.

35. The communication device of claim 33,

36. The communication device of claim 34,

the sending unit is further configured to send at least one virtual subchannel number to the terminal device.

37. The communication device of claim 33,

38. The communication device according to claim 36 or 37,

the sending unit is further configured to configure a corresponding relationship between a virtual subchannel number and an uplink subchannel number for the terminal device through a fixed channel, where the corresponding relationship between the virtual subchannel number and the uplink subchannel number includes a time-related parameter.

39. The communication device of claim 38,

the processing unit is further configured to determine a time when the terminal device uses a channel, where the channel includes all downlink channels used by the network device to send downlink data to the terminal device, and all uplink sub-channels used by the terminal device to send uplink data to the network device.

40. The apparatus according to claim 39, wherein if the terminal device uses the uplink sub-channel corresponding to at least one uplink sub-channel number for an available duration less than the available duration of the first downlink channel corresponding to the first downlink channel number,

the sending unit is further configured to send a second instruction, where the second instruction is used to instruct the terminal device to perform frequency hopping within the frequency range of the first downlink channel.

41. A communications apparatus, comprising: at least one processor and a memory;

the memory is for storing computer software instructions which, when executed by the processor, are executed by the processor to implement the data transmission method of any one of claims 1 to 20.

42. A computer-readable storage medium, comprising: computer software instructions;

the computer software instructions, when executed by a processor, implement the data transmission method of any one of claims 1-20.