COMMUNICATION METHOD, DEVICE, AND SYSTEM

Abstract

An embodiment of this application provides a communication method, apparatus, and system for scheduling frequency domain resources of an uplink signal by a network device. The method includes: the network device receives first information from a first terminal device. The first information indicates that the first terminal device has the capability to transmit an uplink signal on a first carrier, where the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers: a carrier on which the first downlink signal is located; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located. The network device determines second information based on the first information and sends the second information to the first terminal device. The second information indicates frequency domain resources used by the first terminal device to transmit the first uplink signal.

Description

[Technical Field]

[0001] This application claims priority to Chinese Patent Application No. 202211297967.1, entitled "COMMUNICATION METHOD, APPARATUS, AND SYSTEM," filed with the State Intellectual Property Office of the People's Republic of China on October 21, 2022, which is incorporated herein by reference in its entirety.

[0002] This application relates to the field of communications technology, and more particularly to communications methods, devices, and systems. [Background technology]

[0003] In order to reduce the power consumption of terminal devices, passive Internet of Things (passive IoT) / backscatter communication has emerged. In the passive Internet of Things / backscatter communication process, the terminal device does not include a power supply circuit or device, and obtains energy supply only by receiving a downlink radio frequency signal transmitted by a network device, obtaining a DC voltage through a series of circuits such as a filter circuit, demodulating the subsequent downlink signal, and then returning an uplink signal to the network device.

[0004] In the prior art, terminal devices with different capabilities exist, and the terminal devices may transmit uplink signals at different frequency offsets relative to the center frequency of the downlink signal. For example, some terminal devices may transmit uplink signals only on the carrier on which the downlink signal is located, and some terminal devices may transmit uplink signals on a carrier different from the carrier on which the downlink signal is located. In addition, the different capabilities of the terminal devices may be reflected in the fact that each terminal device can generate a double-sideband uplink signal, while some terminal devices can also generate a single-sideband uplink signal because they have an in-phase quadrature (IQ) circuit or a filter circuit.

[0005] When multiple terminal devices with different capabilities access the same network device, an urgent problem to be solved is how the network device can schedule frequency domain resources of an uplink signal to accommodate as many terminal devices with different capabilities as possible. Summary of the Invention

[0006] SUMMARY OF THE INVENTION Embodiments of this application provide a communication method, apparatus, and system for implementing scheduling of frequency domain resources of uplink signals by network devices.

[0007] To achieve the above objectives, the embodiments of this application utilize the following technical solutions:

[0008] According to a first aspect, there is provided a communication method, and an apparatus for performing the communication method may be a network device or a module used in the network device, such as a chip or a chip system. In the following, an example in which the executing entity is a network device is used for explanation. The network device receives first information from a first terminal device, where the first information indicates that the first terminal device has the capability of transmitting an uplink signal on a first carrier, where a center frequency of the uplink signal is different from a center frequency of the first downlink signal, and the first carrier is one of the following carriers: a carrier on which the first downlink signal is located, a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from that of the carrier on which the first downlink signal is located, or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located. The network device determines second information based on the first information and transmits the second information to the first terminal device, where the second information indicates frequency domain resources utilized by the first terminal device to transmit the first uplink signal. The first uplink signal is a signal obtained through modulating the first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device.

[0009] In an embodiment of this application, the network device may allocate frequency domain resources to the first terminal device that meet the capabilities of the first terminal device and are utilized to transmit the first uplink signal, based on first information reported by the first terminal device and indicating that the first terminal device has the capability to transmit an uplink signal on a first carrier. When multiple first terminal devices exist, the network device may flexibly schedule frequency domain resources for transmitting the multiple first uplink signals, so that the frequency domain resources for the multiple first uplink signals do not overlap and can accommodate as many first terminal devices with different capabilities as possible to maximize the uplink transmission capacity. In addition, the center frequency of the uplink signal is different from the center frequency of the first downlink signal. Therefore, when the network device demodulates the first uplink signal, it can prevent the problem of co-channel interference caused by transmitting the first downlink signal, which helps to improve the uplink coverage.

[0010] In relation to the first aspect, in a possible implementation, the first terminal device having the capability to transmit an uplink signal on a first carrier may include: The first terminal device has the capability of transmitting an uplink signal at a first frequency domain location greater than a center frequency of a first downlink signal on a first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first carrier is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first carrier; or The first terminal device has the capability to transmit an uplink signal at a first frequency domain location or a second frequency domain location on a first carrier. In this solution, a specific frequency interval exists between the first downlink signal and the uplink signal, which can prevent the duplex interference problem occurring in the communication process between the network device and the first terminal device to a certain extent. This helps improve the coverage performance of the uplink signal transmitted by the first terminal device. In addition, the uplink signal occupies only one frequency domain location, doubling the spectral efficiency of the uplink signal. This helps support more terminal devices to simultaneously transmit uplink signals on the same frequency domain resource and improve system capacity.

[0011] In relation to the first aspect, in a possible implementation, the first carrier is a carrier that is within the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability of transmitting an uplink signal on a first carrier having a frequency that is a first frequency offset higher than the center frequency of the carrier on which the first downlink signal is arranged, and a first carrier having a frequency that is a second frequency offset lower than the center frequency of the carrier on which the first downlink signal is arranged, The first frequency offset and the second frequency offset are frequency offsets between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged, and the values ​​of the first frequency offset and the second frequency offset are the same; or The first terminal device has the capability to transmit an uplink signal on the first carrier at the first frequency offset or the second frequency offset. In this solution, the problem of duplex interference occurring in the process of communication between the network device and the first terminal device can be better prevented. This helps to improve the coverage performance of the uplink signal transmitted by the first terminal device. In addition, in this solution, the uplink spectrum resources can be effectively utilized, and more terminal devices can be supported to transmit uplink signals at the same time. This helps to improve the spectrum resource utilization rate and increase the uplink transmission system capacity.

[0012] In relation to the first aspect, in a possible implementation, a value of a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is arranged is less than or equal to a first threshold.

[0013] In relation to the first aspect, in a possible implementation, the first carrier is a carrier located on a different frequency band than that of the carrier on which the first downlink signal is located. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability to transmit uplink signals on a first carrier within an uplink frequency band of one or more frequency ranges; or The first terminal device has the capability to transmit an uplink signal on a first carrier in a frequency band that is separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located. In this solution, the frequency spacing or frequency offset between the first downlink signal and the uplink signal is large and is an inter-band frequency spacing. In this solution, the problem of duplex interference occurring in the process of communication between the network device and the first terminal device can be completely prevented. This helps improve the coverage performance of the uplink signal transmitted by the first terminal device. In addition, in this solution, the spectrum resources of the uplink frequency range of the LTE or NR cellular network can be effectively utilized so that the transmission of the uplink signal complies with the relevant protocol of the cellular network.

[0014] In relation to the first aspect, in a possible implementation, the frequency band in which the carrier of the first downlink signal is located and the frequency band in which the first carrier is located are two frequency bands of a frequency division duplex frequency range.

[0015] In relation to the first aspect, in a possible implementation, the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in a random access process.

[0016] In a possible implementation related to the first aspect, the second information may be: the number of frequency domain locations occupied by the first uplink signal; a frequency offset between the first uplink signal and the first downlink signal; a frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; or Bandwidth of the first uplink signal It includes at least one of the following: In this solution, the information included in the second information can be utilized by the first terminal device to determine the frequency domain location and frequency domain bandwidth of the first uplink signal, i.e., to determine the frequency domain resources occupied by the first uplink signal.

[0017] In relation to the first aspect, in a possible implementation, the second information is carried in a paging message, Msg4 in a random access process, downlink control information DCI, a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal.

[0018] In relation to the first aspect, in a possible implementation, the second information indicates a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier. The second information includes modulation and coding scheme MCS information and / or the number of frequency domain locations occupied by the first uplink signal. The number of frequency domain locations occupied by the first uplink signal is 1 or 2, and the MCS information is utilized by the first terminal device to determine a value of a frequency offset between the first frequency domain location and / or the second frequency domain location and a center frequency of the first downlink signal, and a bandwidth of the first uplink signal.

[0019] In relation to the first aspect, in a possible implementation, the MCS information includes a value of a line code or spreading code coefficient of the first uplink signal and / or a modulation symbol length of the first uplink signal.

[0020] In relation to the first aspect, in a possible implementation, the second information further indicates a frequency domain location of the first carrier, and the second information further includes a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is located. The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset, or The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset and is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset; or The first carrier is located within an uplink frequency band of one or more frequency ranges, or The first carrier is located in a frequency band that is different from and separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0021] According to a second aspect, there is provided a communication method. An apparatus for performing the communication method may be a first terminal device, or may be a module used in the first terminal device, such as a chip or a chip system. In the following, an example in which the execution subject is the first terminal device is used for explanation. The first terminal device sends first information to the network device, where the first information indicates that the first terminal device has the ability to transmit an uplink signal on a first carrier, where the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers: a carrier on which the first downlink signal is located; A carrier that is on the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged, or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; It is one of the following. The first terminal device receives second information from the network device and transmits a first uplink signal to the network device on a frequency domain resource indicated by the second information, where the first uplink signal is a signal obtained by modulating a first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device.

[0022] In relation to the second aspect, in a possible implementation, the first terminal device having the capability to transmit an uplink signal on the first carrier may include: The first terminal device has the capability of transmitting an uplink signal at a first frequency domain location greater than a center frequency of a first downlink signal on a first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first carrier is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first carrier; or The first terminal device has the capability to transmit an uplink signal at the first frequency domain location or the second frequency domain location on the first carrier. Includes.

[0023] In relation to the second aspect, in a possible implementation, the first carrier is a carrier that is within the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability of transmitting an uplink signal on a first carrier having a frequency that is a first frequency offset higher than the center frequency of a carrier on which a first downlink signal is arranged, and a first carrier having a frequency that is a second frequency offset lower than the center frequency of a carrier on which a first downlink signal is arranged, wherein the first frequency offset and the second frequency offset are frequency offsets between the center frequency of the first carrier and the center frequency of a carrier on which a first downlink signal is arranged, and the first frequency offset and the second frequency offset have the same value; or The first terminal device has the capability to transmit an uplink signal on the first carrier at the first frequency offset or the second frequency offset.

[0024] In relation to the second aspect, in a possible implementation, the values ​​of the first frequency offset and the second frequency offset are less than or equal to a first threshold.

[0025] In relation to the second aspect, in a possible implementation, the first carrier is a carrier located on a different frequency band than that of the carrier on which the first downlink signal is located. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability to transmit uplink signals on a first carrier within an uplink frequency band of one or more frequency ranges; or The first terminal device has the capability to transmit an uplink signal on a first carrier in a frequency band that is separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0026] In relation to the second aspect, in a possible implementation, the frequency band in which the carrier of the first downlink signal is located and the frequency band in which the first carrier is located are two frequency bands of a frequency division duplex frequency range.

[0027] In relation to the second aspect, in a possible implementation, the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in a random access process.

[0028] In relation to the second aspect, in a possible implementation, the second information may be: the number of frequency domain locations occupied by the first uplink signal; a frequency offset between the first uplink signal and the first downlink signal; a frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; or Bandwidth of the first uplink signal It includes at least one of the following:

[0029] In relation to the second aspect, in a possible implementation, the second information is carried in a paging message, Msg4 in a random access process, downlink control information DCI, a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal.

[0030] In relation to the second aspect, in a possible implementation, the second information indicates a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier. The second information includes modulation and coding scheme MCS information and / or the number of frequency domain positions occupied by the first uplink signal. The number of frequency domain locations occupied by the first uplink signal is 1 or 2, and the MCS information is utilized by the first terminal device to determine a value of a frequency offset between the first frequency domain location and / or the second frequency domain location and a center frequency of the first downlink signal, and a bandwidth of the first uplink signal.

[0031] In relation to the second aspect, in a possible implementation, the MCS information includes a value of a line code or a spreading code coefficient of the first uplink signal and / or a modulation symbol length of the first uplink signal.

[0032] In relation to the second aspect, in a possible implementation, the second information further indicates a frequency domain location of the first carrier, and the second information further includes a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is located. The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset, or The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset and is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset; or The first carrier is located within an uplink frequency band of one or more frequency ranges, or The first carrier is located in a frequency band that is different from and separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0033] According to a third aspect, there is provided a communication device for implementing the above method. The communication device includes corresponding modules, units, or means for implementing the above method. The modules, units, or means may be realized by hardware, software, or hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0034] In relation to the third aspect, in a possible implementation, a network device includes a transceiver module and a processing module. The transceiver module receives first information from a first terminal device; The first information indicates that the first terminal device has the ability to transmit an uplink signal on a first carrier, and the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers, namely: a carrier on which the first downlink signal is located; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; The present invention is configured to perform one of the following: The processing module is configured to determine second information based on the first information. The processing module is configured to determine second information based on the first information, where the second information indicates a frequency domain resource utilized by the first terminal device to transmit a first uplink signal, and the first uplink signal is a signal obtained through modulating a first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device. The transceiver module is further configured to transmit the second information to the first terminal device.

[0035] In relation to the third aspect, in a possible implementation, the first terminal device having the capability to transmit an uplink signal on the first carrier may include: The first terminal device has the capability of transmitting an uplink signal at a first frequency domain location greater than a center frequency of a first downlink signal on a first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first carrier is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first carrier; or The first terminal device has the capability to transmit an uplink signal at a first frequency domain location or a second frequency domain location on a first carrier.

[0036] In relation to the third aspect, in a possible implementation, the first carrier is a carrier that is within the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability of transmitting an uplink signal on a first carrier having a frequency that is a first frequency offset higher than the center frequency of the carrier on which the first downlink signal is arranged, and a first carrier having a frequency that is a second frequency offset lower than the center frequency of the carrier on which the first downlink signal is arranged, The first frequency offset and the second frequency offset are frequency offsets between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged, and the values ​​of the first frequency offset and the second frequency offset are the same; or The first terminal device has the capability to transmit an uplink signal on the first carrier at the first frequency offset or the second frequency offset.

[0037] In relation to the third aspect, in a possible implementation, the values ​​of the first frequency offset and the second frequency offset are less than or equal to a first threshold.

[0038] In relation to the third aspect, in a possible implementation, the first carrier is a carrier located on a different frequency band than that of the carrier on which the first downlink signal is located. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability to transmit uplink signals on a first carrier within an uplink frequency band of one or more frequency ranges; or The first terminal device has the capability to transmit an uplink signal on a first carrier in a frequency band that is separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0039] In relation to the third aspect, in a possible implementation, the frequency band in which the carrier of the first downlink signal is located and the frequency band in which the first carrier is located are two frequency bands of a frequency division duplex frequency range.

[0040] In relation to the third aspect, in a possible implementation, the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in a random access process.

[0041] In relation to the third aspect, in a possible implementation, the second information is: Line code rate, the number of frequency domain locations occupied by the first uplink signal; a frequency offset between the first uplink signal and the first downlink signal; a frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; or Bandwidth of the first uplink signal It includes at least one of the following:

[0042] In relation to the third aspect, in a possible implementation, the second information is carried in a paging message, Msg4 in a random access process, downlink control information DCI, a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal.

[0043] In a possible implementation related to the third aspect, the second information indicates a frequency domain location and a frequency domain bandwidth of a first uplink signal on a first carrier. The second information includes modulation and coding scheme (MCS) information and / or the number of frequency domain locations occupied by the first uplink signal. The number of frequency domain locations occupied by the first uplink signal is one or two, and the MCS information is used by the first terminal device to determine a value of a frequency offset between the first frequency domain location and / or the second frequency domain location and the center frequency of the first downlink signal, and the bandwidth of the first uplink signal.

[0044] In relation to the third aspect, in a possible implementation, the MCS information includes a value of a line code or spreading code coefficient of the first uplink signal and / or a modulation symbol length of the first uplink signal.

[0045] In relation to the third aspect, in a possible implementation, the second information further indicates a frequency domain location of the first carrier, and the second information further includes a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is located. The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset, or the center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset and is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset; or The first carrier is located within an uplink frequency band of one or more frequency ranges, or The first carrier is located in a frequency band that is different from and separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0046] According to a fourth aspect, there is provided a communication device for implementing the above method. The communication device includes corresponding modules, units, or means for implementing the above method. The modules, units, or means may be realized by hardware, software, or hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0047]

[0010] Regarding the fourth aspect, in a possible implementation, a communications device includes a transceiver module. The transceiver module transmits first information to the network device, The first information indicates that the first terminal device has the ability to transmit an uplink signal on a first carrier, and the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers, namely: a carrier on which the first downlink signal is located; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; The present invention is configured to perform one of the following: The transceiver module is further configured to receive second information from the network device and transmit a first uplink signal to the network device on a frequency domain resource indicated by the second information, wherein the first uplink signal is a signal obtained through modulating a first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device.

[0048] In relation to the fourth aspect, in a possible implementation, the first terminal device having the capability to transmit an uplink signal on the first carrier may include: The first terminal device has the capability of transmitting an uplink signal at a first frequency domain location greater than a center frequency of a first downlink signal on a first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first carrier is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first carrier; or The first terminal device has the capability to transmit an uplink signal at a first frequency domain location or a second frequency domain location on a first carrier.

[0049] In relation to the fourth aspect, in a possible implementation, the first carrier is a carrier that is in the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability of transmitting an uplink signal on a first carrier having a frequency that is a first frequency offset higher than the center frequency of a carrier on which a first downlink signal is arranged, and a first carrier having a frequency that is a second frequency offset lower than the center frequency of a carrier on which a first downlink signal is arranged, wherein the first frequency offset and the second frequency offset are frequency offsets between the center frequency of the first carrier and the center frequency of a carrier on which a first downlink signal is arranged, and the first frequency offset and the second frequency offset have the same value; or The first terminal device has the capability to transmit an uplink signal on the first carrier at the first frequency offset or the second frequency offset.

[0050] In relation to the fourth aspect, in a possible implementation, the values ​​of the first frequency offset and the second frequency offset are less than or equal to a first threshold.

[0051] In relation to the fourth aspect, in a possible implementation, the first carrier is a carrier located on a different frequency band than that of the carrier on which the first downlink signal is located. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability to transmit uplink signals on a first carrier within an uplink frequency band of one or more frequency ranges; or The first terminal device has the capability to transmit an uplink signal on a first carrier in a frequency band that is separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0052] In relation to the fourth aspect, in a possible implementation, the frequency band in which the carrier of the first downlink signal is located and the frequency band in which the first carrier is located are two frequency bands of a frequency division duplex frequency range.

[0053] In relation to the fourth aspect, in a possible implementation, the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in a random access process.

[0054] In relation to the fourth aspect, in a possible implementation, the second information is: the number of frequency domain locations occupied by the first uplink signal; a frequency offset between the first uplink signal and the first downlink signal; a frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; or Bandwidth of the first uplink signal It includes at least one of the following:

[0055] In relation to the fourth aspect, in a possible implementation, the second information is carried in a paging message, Msg4 in a random access process, downlink control information DCI, a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal.

[0056] In relation to the fourth aspect, in a possible implementation, the second information indicates a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier. The second information includes modulation and coding scheme MCS information and / or the number of frequency domain positions occupied by the first uplink signal. The number of frequency domain locations occupied by the first uplink signal is 1 or 2, and the MCS information is utilized by the first terminal device to determine a value of a frequency offset between the first frequency domain location and / or the second frequency domain location and a center frequency of the first downlink signal, and a bandwidth of the first uplink signal.

[0057] In relation to the fourth aspect, in a possible implementation, the MCS information includes a value of a line code or a spreading code coefficient of the first uplink signal and / or a modulation symbol length of the first uplink signal.

[0058] In relation to the fourth aspect, in a possible implementation, the second information further indicates a frequency domain location of the first carrier, and the second information further includes a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is located. The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset, or The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset and is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset; or The first carrier is located within an uplink frequency band of one or more frequency ranges, or The first carrier is located in a frequency band that is different from and separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located.

[0059] According to a fifth aspect, there is provided a communication system including a network device that performs the method according to the first aspect and a first terminal device that performs the method according to the second aspect.

[0060] According to a sixth aspect, there is provided a communications device including a processor, coupled to a memory and configured to read computer instructions stored in the memory and then perform the method according to the first or second aspect in accordance with the instructions.

[0061]

[0013] In relation to the sixth aspect, in a possible implementation, the communication device further includes a memory configured to store computer instructions.

[0062] In a possible implementation related to the sixth aspect, the communication device further includes a communication interface. The communication interface is used by the communication device to communicate with other devices. For example, the communication interface may be a transceiver, an input / output interface, an interface circuit, an output circuit, an input circuit, a pin, or a related circuit.

[0063] In relation to the sixth aspect, in a possible implementation, the communication device may be a chip or a chip system. When the communication device is a chip system, the communication device may include a chip or may include a chip and other separate devices.

[0064] According to a seventh aspect, there is provided a computer-readable storage medium storing instructions that, when executed on a computer, enable the computer to perform a method according to the first or second aspect.

[0065] According to an eighth aspect, there is provided a computer program product comprising instructions which, when executed on a computer, enable the computer to carry out a method according to the first or second aspect.

[0066] For the technical effects provided by any one of the possible implementations of the fifth to eighth aspects, please refer to the technical effects provided by various implementations of the first aspect, and the details will not be described again here. [Brief explanation of the drawings]

[0067] [Figure 1A] FIG. 1 is a spectrum diagram of a double-sideband OOK / ASK modulated signal in the prior art. [Figure 1B] 1 is a diagram of a time-domain waveform of a double-sideband OOK / ASK modulated signal in the prior art; [Figure 2] 1A-1D are spectrum diagrams of uplink double sideband OOK / ASK modulated signals in different configurations of the prior art; [Figure 3] 1 is a diagram of the architecture of a communication system according to an embodiment of the present application; [Figure 4] 1 is a diagram of the structure of a communication device according to an embodiment of the present application; [Figure 5] 1 is a flowchart of a communication method according to an embodiment of the present application. [Figure 6A] 1 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 6B] 2 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 6C] 3 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 6D] 4 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 6E] 5 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 6F] 6 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 7A] 7 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 7B] 8 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 7C] 9 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application. [Figure 8] 10 is a diagram of the capabilities of a first terminal device according to an embodiment of the present application; [Figure 9] 2 is a structure of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0068] In order to facilitate understanding of the technical solutions in the embodiments of this application, the following first provides a brief description of the technologies or terms related to this application.

[0069] First, backscatter communication is described.

[0070] With the development of machine-type communication (MTC) and Internet of Things (IoT) technologies in 5th generation (5G) new radio (NR), the number of IoT devices is increasing, and the demand for reducing IoT device power consumption is also growing. As early as the 4th generation (4G) mobile communication era, the 3rd generation partnership project (3GPP) proposed the narrowband IoT (NB-IoT) system. However, because NB-IoT terminal devices require energy supply from an external power supply circuit, such as a power supply device or battery, and must be capable of generating a high-frequency local oscillator carrier, the power consumption of NB-IoT terminal devices can only reach the milliwatt level. To realize the goal of connecting everything in 5G IoT technology, passive or semi-passive terminal devices access 5G networks and perform active communication in the 5G network, i.e., passive Internet of Things (IoT) or backscatter communication, as referred to in 3GPP Release 18. Passive Internet of Things (IoT) or backscatter communication is a key research direction for current 5G or 5.5th generation (5.5G) communication systems and beyond. Passive or semi-passive terminal devices do not always require externally supplied energy. They may use passively received radio frequency signals from the outside as a local energy source, or may combine other energy harvesting methods. Passive terminal devices and semi-passive terminal devices are sometimes collectively referred to as backscatter communication terminal devices or passive Internet of Things (IoT) terminal devices, and passive terminal devices are sometimes referred to as passive backscatter communication terminal devices. In passive Internet of Things / backscatter communication, a "terminal device" is sometimes referred to as a "label."

[0071] Compared with an NB-IoT terminal device, the power consumption of a backscatter communication terminal device may reach the 100 microwatt level, or even less than 100 microwatts. In view of power consumption limitations, the backscatter communication terminal device may not have the ability to generate a high-frequency local oscillator carrier, i.e., the backscatter communication terminal device does not have the ability to generate a local carrier corresponding to a downlink radio frequency signal. Therefore, when demodulating a downlink radio frequency signal, the backscatter communication terminal cannot use a coherent demodulation mode, but can only rely on a non-coherent demodulation mode. In the communications field, the most commonly used non-coherent demodulation method is envelope detection. Furthermore, the receiving end device may first pass the received radio frequency signal through a rectifier diode to perform self-mixing or self-amplification, and then pass the signal output by the rectifier diode through a baseband low-pass resistance capacitor (RC) filter to filter out high-frequency components and obtain an effective modulated baseband signal. The receiving end device may then sample the modulated baseband signal and input the sampled digital signal into a signal energy or amplitude comparator to perform information determination.

[0072] Secondly, on-off keying (OOK) / amplitude shift keying (ASK) modulated signals are described.

[0073] 1. Conventional OOK / ASK modulated signal or double sideband OOK / ASK modulated signal OOK / ASK modulation is an amplitude modulation mode. Envelope detection can be used for demodulation. Unlike modulation schemes frequently used in NR systems, such as phase-shift keying (PSK) or quadrature amplitude modulation (QAM), which have two in-phase quadrature (IQ) signals, OOK / ASK modulation has only one modulated signal. OOK / 2ASK modulation is used as an example. The transmitting end modulates the "0" and "1" in the original bit string into two amplitude signals. For example, the transmitting end modulates the "0" and "1" into rectangular or square wave signals or nearly rectangular or square wave signals with amplitudes 0 and 1. Because OOK / ASK modulation has only one modulated signal, the spectral function of the signal obtained through OOK / ASK modulation, i.e., the OOK / ASK modulated signal, is conjugate symmetric about the center frequency, and the power spectral function is axisymmetric about the center frequency. Therefore, a conventional OOK / ASK modulated signal is a double sideband modulated signal.

[0074] Generally, the problem of double sideband modulation signals is low spectral efficiency. For example, when the symbol rate of an OOK / ASK modulation signal is R, that is, when the effective signal bandwidth is R, the main lobe bandwidth or actual transmission bandwidth in the frequency domain is 2W. In this case, the effective spectral efficiency is: Effective signal bandwidth / actual transmission bandwidth = W / 2W = 0.5 As shown in Figure 1A, in the frequency domain, the horizontal axis indicates frequency and the vertical axis indicates amplitude. The actual transmission bandwidth of an OOK / ASK modulated signal is 180 kHz, which is equivalent to one resource block (RB) in a 5th generation (5G) new radio (NR) system, but the effective signal bandwidth is only 90 kHz. Figure 1B shows the time-domain waveform corresponding to Figure 1A. The horizontal axis indicates time and the vertical axis indicates amplitude. The duration of each OOK / ASK modulated symbol is 1 / effective signal bandwidth = 1 / 90kHz ≒ 11.1μs The 5G NR system is used as an example. The subcarrier spacing is 15 kHz. Before the cyclic prefix (CP) is added, the duration of one orthogonal frequency division multiplexing (OFDM) symbol is 1 / 15kHz ≒ 66.7μs In other words, only a maximum of (66.7 μs / 11.1 μs≈) 6 OOK / ASK symbols can be carried within the duration of one OFDM symbol.

[0075] As a result, the double-sideband frequency domain characteristics of the OOK / ASK modulated signal affect the signal transmission efficiency. In a passive Internet of Things or backscatter communication scenario, when a base station modulates a downlink signal through OOK / ASK, the transmission efficiency of the downlink signal is also affected. Referring to the above example, if the number of OOK / ASK symbols carried within the duration of one OFDM symbol needs to be doubled, the duration of each OOK / ASK modulated symbol is 1 / 180kHz ≒ 5.55μs In other words, an actual bandwidth of 180 kHz and an actual transmission bandwidth of 360 kHz, which is equivalent to two RBs in a 5G NR system, are required.

[0076] 2. Single-sideband OOK / ASK modulated signal

[0077] In the embodiments of this application, the "upper-sideband (USB)" may also be referred to as the "right-sideband" or "positive sideband." Similarly, in the embodiments of this application, the "lower-sideband (LSB)" may also be referred to as the "left-sideband" or "negative sideband." A unified description is provided here. Details will not be described again below.

[0078] To improve spectral efficiency, the upper half-sideband frequency domain signal or the lower half-sideband frequency domain signal of a double-sideband OOK / ASK modulated signal can be removed. For example, if the OOK / ASK baseband signal is s(t), the frequency domain signal corresponding to s(t) is S(f), and the Hilbert transform of s(t) is

[0079]

number

[0080] The Hilbert transform leaves the modulus values ​​of the frequency domain response of a signal unchanged, but shifts the phase by 90°, i.e.

[0081]

number

[0082] The frequency domain signal corresponding to

[0083]

number

[0084] This means that the generated baseband signal is

[0085]

number

[0086] Then the frequency domain signal corresponding to m(t) is

[0087]

number

[0088] That is, in the frequency domain, when compared with s(t), only the upper or lower sideband is left for m(t). Therefore, m(t) is sometimes referred to as a single-sideband signal, and the above transformation from s(t) to m(t) is sometimes referred to as an IQ transform.

[0089] When the symbol rate is R, only the upper sideband or the lower sideband is left for the single-sideband OOK / ASK modulated signal, i.e., the actual transmission bandwidth is also R, so the spectral efficiency of the single-sideband OOK / ASK modulated signal can increase to 1.0. For example, if both the effective signal bandwidth and the actual transmission bandwidth of the single-sideband OOK / ASK modulated signal are 180 kHz, and the duration of each single-sideband OOK / ASK modulated symbol is 1 / effective signal bandwidth = 1 / 180kHz ≒ 5.55μs , which is half the duration of a double-sideband OOK / ASK modulation symbol. A 5G NR system is used as an example. When the subcarrier spacing is 15 kHz and before CP is added, the duration of one OFDM symbol is 1 / 15 kHz ≒ 66.7 μs. In other words, a maximum of (66.7 μs / 5.55 μs) 12 single-sideband OOK / ASK symbols can be carried within the duration of one OFDM symbol, and the number of symbols is twice the number of double-sideband OOK / ASK symbols.

[0090] Third, terminal devices with different frequency shifting capabilities are described.

[0091] As described in the background art, terminal devices with different frequency shift capabilities may transmit uplink signals with different frequency offsets relative to the center frequency of the downlink signal. Based on the value of the frequency shift capability, terminal devices may be classified into the following types:

[0092] 1. Terminal device with intra-carrier frequency shift capability

[0093] By adjusting the line code rate M and the time length T of the unit modulation symbol, the base station can dynamically adjust the frequency domain position and frequency domain bandwidth of the uplink signal transmitted by the terminal device on the carrier on which the downlink signal is located. The line code can be a code type for line coding, such as Manchester coding or Miller coding. Line coding generally refers to a process in which a source signal, or a signal output by an encoder, exhibits periodic rising or falling edges, and the line coding transformation makes the digital signal transmitted over the channel more suitable for information transmission.

[0094] For example, the base station may configure various line code rates M and various time lengths T of the unit modulation symbol as shown in Table 1. Manchester coding is used as an example. The unit information bit is encoded into 2M symbols, and the symbols within the 2M symbols are characterized by periodic alternation of 0 and 1. For example, when M=2, information bit 1 is encoded into a symbol of {1010}, which alternates between high and low levels, and information bit 0 is encoded into a symbol of {0101}, which alternates between low and high levels. The duration of the symbol is equal to the time length of the modulation symbol. The time length T of the unit modulation symbol is given by R × unit symbol time length where the unit symbol time length is 3.125 μs.

[0095] [Table 1]

[0096] As described above, in the frequency domain, a conventional OOK / ASK modulated signal corresponds to two sidebands, i.e., an upper sideband and a lower sideband, that are symmetrical about a center frequency. In relation to Table 1, FIG. 2 shows spectrum diagrams of uplink signals in various configurations. The uplink signals in the various configurations are all located on the same carrier and have two sidebands that are symmetrical about a center frequency. The frequency domain locations of the uplink signals in different configurations are different. For example, compared to an uplink signal corresponding to R=64 and M=1, an uplink signal corresponding to R=16 and M=4 has a 5 kHz offset. Compared to an uplink signal corresponding to R=16 and M=4, an uplink signal corresponding to R=8 and M=8 has a 10 kHz offset. However, because the product of the modulation symbol length and the line code rate is 64 and remains unchanged, the frequency domain bandwidth of the uplink signals in the various configurations is the same.

[0097] If the terminal device has an IQ modulation circuit or a circuit for suppressing the upper half-sideband or lower half-sideband of the uplink signal, the terminal device may be capable of transmitting a single-sideband uplink signal. The Q signal is a signal obtained by performing a Hilbert transform on the I signal. Only the upper sideband signal or the lower sideband signal is left for the single-sideband uplink signal, and the single-sideband uplink signal may be located at a frequency domain position obtained by performing addition of the center frequency and a frequency offset, or may be located at a frequency domain position obtained by performing subtraction of the center frequency and a frequency offset. Correspondingly, the frequency domain bandwidth of the single-sideband uplink signal is the frequency domain bandwidth of the upper sideband signal or the lower sideband signal, and is reduced by half compared to the frequency domain bandwidth of the double-sideband uplink signal.

[0098] A limitation of a terminal device having only intra-carrier frequency shift capability is that the terminal device transmits uplink signals only at frequency offsets within one carrier, which limits the frequency resources available for transmitting uplink signals and may result in ineffective utilization of all uplink frequency domain resources, resulting in limited capacity for uplink signal transmission.

[0099] 2. Terminal device having inter-carrier frequency shift capability within a frequency band

[0100] This type of terminal device is m The terminal device may generate an intermediate frequency clock signal having a frequency of 180 kHz, 360 kHz, or 540 kHz, and may then perform frequency mixing between the intermediate frequency clock signal and the received downlink signal to obtain an uplink signal with a specific offset. For example, the frequency of the intermediate frequency clock signal is 2.16 MHz, and the terminal device may use a frequency divider to divide the intermediate frequency clock and generate a local signal with a specific frequency, including, for example, 180 kHz, 360 kHz, or 540 kHz. The terminal device may perform frequency mixing between the signal generated through frequency division by the frequency divider and the received downlink signal to shift the center frequency of the carrier of the baseband signal by 180 kHz, 360 kHz, or 540 kHz.

[0101] The clock signal for frequency mixing is usually a single signal, for example, the clock signal generated for frequency mixing is cos(2πf m t), the clock signal has a frequency of +f m and frequency -f m If the terminal device does not have an IQ circuit, the uplink signal obtained through frequency mixing will have a carrier center frequency of f c +f m and f c -f m where f cis the center frequency of the downlink signal. If the terminal device has a circuit for removing one of the sideband signals, the uplink signal obtained through frequency mixing will have a center frequency of f c +f m or f c -f m is the baseband signal at

[0102] 3. Terminal device with inter-band frequency shift capability

[0103] This type of terminal device generates f through a ring oscillator or crystal oscillator circuit. b The frequency bands may generate intermediate frequency and high frequency clock signals having frequencies of 100 MHz to 150 MHz, thereby realizing an inter-frequency band frequency offset. For example, for an n8 frequency range within the frequency division duplexing (FDD) frequency range, the downlink frequency range is 925 MHz to 960 MHz, and the uplink frequency range is 880 MHz to 915 MHz. The frequency interval between the uplink and downlink frequency ranges is -45 MHz. A terminal device with inter-frequency band frequency shift capability may transmit a downlink signal in the FDD downlink frequency range and an uplink signal in the FDD uplink frequency range.

[0104] The following describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. In the description of this application, unless otherwise specified, " / " represents an "or" relationship between related objects. For example, A / B may represent A or B. The term "and / or" in this application is simply an association relationship to describe related objects, and represents the existence of three possible relationships. For example, A and / or B may represent the following three cases: only A exists, both A and B exist, and only B exists. Here, A and B may each be singular or plural. In addition, in the description of this application, "plurality" means two or more unless otherwise specified. "At least one of the following items (moieties)" or similar expressions means any combination of these items, including any combination of singular items (moieties) or multiple items (moieties). For example, at least one item (portion) of a, b, or c may refer to a, b, c, a and b, a and c, b and c, or a, b, and c. Here, a, b, and c may be singular or plural. In addition, to clearly describe the technical solutions in the embodiments of this application, terms such as "first" and "second" are used in the embodiments of this application to distinguish between identical or similar items that provide essentially the same function or purpose. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not indicate absolute differences. In addition, in the embodiments of this application, terms such as "example" or "for example" are used to represent providing an example, illustration, or explanation. Any embodiment or design scheme described as an "example" or "for example" in the embodiments of this application should not be construed as being preferred or having more advantages than other embodiments or design schemes. Specifically, the use of terms such as "example" or "for example" is intended to present the relevant concept in a concrete manner for ease of understanding.

[0105] 3 shows a communication system 30 according to an embodiment of this application. The communication system 30 includes a network device 301 and a first terminal device 302 that can communicate with each other. The first terminal device 302 is configured to send first information to the network device 301. The first information indicates that the first terminal device 302 has the capability of transmitting an uplink signal on a first carrier, where a center frequency of the uplink signal is different from a center frequency of the first downlink signal, and the first carrier is any one of the following carriers: a carrier on which the first downlink signal is located, a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located, or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located. The network device 301 is configured to receive first information from the first terminal device 302. The network device 301 is further configured to determine second information based on the first information and transmit the second information to the first terminal device 302. The second information indicates frequency domain resources utilized by the first terminal device 302 to transmit a first uplink signal corresponding to the first downlink signal. The first terminal device 302 is further configured to receive second information from the network device 301 and transmit a first uplink signal corresponding to the first downlink signal to the network device 301 on a frequency domain resource indicated by the second information.

[0106] The embodiments of this application are applicable to 5G NR systems, including passive Internet of Things, semi-passive Internet of Things, active tags, Internet of Things using backscattering technology, and environmental Internet of Things. Alternatively, the embodiments of this application are applicable to future wireless communication systems, but are not limited thereto.

[0107] The network device may be a base station, a macro base station, a pole site, a micro base station, a small cell, a helper, a reader, a terminal device, or any other device having the capability of exciting a passive or semi-passive terminal device. The first terminal device may be a passive terminal device, a passive terminal device with an envelope detection receiver, a passive IoT terminal device, a semi-passive terminal device, a semi-passive IoT terminal device, an inactive terminal device, a semi-non-active terminal device, an active terminal device, a terminal device with backscatter capability, a terminal device with reverse carrier capability, a terminal device with active carrier transmission capability, or a label.

[0108] Optionally, the functions related to the network device or the first terminal device in the embodiments of this application may be realized by one device, by multiple devices jointly, or by one or more function modules in one device. This is not particularly limited in the embodiments of this application. It may be understood that the above functions may be network elements in a hardware device, software functions running on dedicated hardware, a combination of hardware and software, or virtual functions instantiated on a platform (e.g., a cloud platform).

[0109] For example, the relevant functions of the network device or the first terminal device in the embodiment of this application may be realized through the communication device 400 of FIG.

[0110] 4 is a diagram of the structure of a communication device 400 according to an embodiment of the present application. The communication device 400 includes one or more processors 401, a communication line 402, and at least one communication interface (in FIG. 4, only an example including a communication interface 404 and one processor 401 is used for illustration purposes), and may optionally further include a memory 403.

[0111] The processor 401 may be a CPU, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to control program execution of the solutions of this application.

[0112] The communication lines 402 may include paths for connecting different components.

[0113] The communication interface 404 may be a transceiver module configured to communicate with other devices or communication networks, such as Ethernet, RAN, or WLAN. For example, the transceiver module may be a device such as a transceiver or a transceiver machine. Optionally, the communication interface 404 may alternatively be a transceiver circuit located within the processor 401 and configured to implement signal input and output for the processor.

[0114] The memory 403 may be any device having storage capabilities. For example, the memory may be, but is not limited to, a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, a random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other compact disc storage, an optical disc storage (including a compressed optical disc, a laser disc, an optical disc, a digital versatile disc, or a Blu-ray disc), a magnetic disc storage medium or other magnetic storage device, or any other medium accessible to a computer that can be used to carry or store expected program code in the form of instructions or data structures. The memory may exist independently or be connected to the processor through communication lines 402. Alternatively, the memory may be integrated into the processor.

[0115] The memory 403 is configured to store computer-executable instructions for executing the solutions in this application, and the processor 401 controls the execution. The processor 401 is configured to execute the computer-executable instructions stored in the memory 403 to implement the communication methods provided in the embodiments of this application.

[0116] Alternatively, in the embodiment of this application, the processor 401 may implement functions related to processing in the communication method provided in the following embodiment of this application, and the communication interface 404 is responsible for communication with other devices or communication networks, which is not particularly limited in the embodiment of this application.

[0117] The computer-executable instructions in the embodiments of this application may also be referred to as application program code, which is not particularly limited in the embodiments of this application.

[0118] In a specific implementation, in an embodiment, the processor 401 may include one or more CPUs, for example, CPU0 and CPU1 in FIG.

[0119] In a specific implementation, in an embodiment, communications device 400 may include multiple processors, such as processor 401 and processor 407 of FIG. 4. Each of the processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor, where a processor may be one or more devices, circuits, and / or processing cores configured to process data (e.g., computer program instructions).

[0120] In a specific implementation, in an embodiment, the communication device 400 may further include an output device 405 and an input device 406. The output device 405 communicates with the processor 401 and may display information in multiple ways.

[0121] The communication device 400 may be a general-purpose device or a dedicated device. For example, the communication device 400 may be a desktop computer, a portable computer, a network server, a palmtop computer (personal digital assistant, PDA), a mobile phone, a tablet computer, a wireless terminal device, an in-vehicle terminal device, an embedded device, or a device having a structure similar to that of Fig. 4. The type of the communication device 400 is not limited in the embodiments of this application.

[0122] The communication method provided in the embodiment of this application will be described in detail below with reference to FIGS. 1A to 4. FIG.

[0123] 5 shows a communication method according to an embodiment of this application. The communication method includes the following steps:

[0124] Step S501: A first terminal device sends first information to a network device, and in response, the network device receives the first information from the first terminal device.

[0125] The first information indicates that the first terminal device has the ability to transmit an uplink signal on a first carrier, and the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers, namely: a carrier on which the first downlink signal is located; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or Any one of the carriers located on a frequency band different from that of the carrier on which the first downlink signal is located.

[0126] Optionally, the second terminal device transmits information indicating that the second terminal device has the capability to transmit the uplink signal on the first carrier to the network device, and in response, the network device receives information from the second terminal device indicating that the second terminal device has the capability to transmit the uplink signal on the first carrier.

[0127] Optionally, the first carrier may be a carrier on which the first downlink signal is located. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability of transmitting an uplink signal at a first frequency domain location greater than a center frequency of a first downlink signal on a first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first downlink signal is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first downlink signal; or The first terminal device has the capability to transmit an uplink signal at the first frequency domain location or the second frequency domain location. In this solution, a specific frequency interval exists between the first downlink signal and the uplink signal, which can prevent the duplex interference problem occurring in the communication process between the network device and the first terminal device to a certain extent. This helps improve the coverage performance of the uplink signal transmitted by the first terminal device. In addition, the uplink signal occupies only one frequency domain location, doubling the spectral efficiency of the uplink signal. This helps support more terminal devices to simultaneously transmit uplink signals on the same frequency domain resource and improve system capacity.

[0128] In the embodiment of this application, the first terminal device has the ability to transmit an uplink signal at a first frequency domain location that is greater than the center frequency of the first downlink signal on the first carrier and at a second frequency domain location that is less than the center frequency of the first downlink signal on the first carrier, as described below: The first terminal device has the capability of transmitting a double sideband frequency shifted signal on a carrier on which the first downlink signal is arranged; The first terminal device has the capability of transmitting an uplink signal on a carrier on which the first downlink signal is arranged, the uplink signal having an upper sideband greater than the center frequency of the first downlink signal and a lower sideband less than the center frequency of the first downlink signal; The first terminal device has the capability of transmitting a modulated signal with a spectral efficiency of 0.5 on the carrier on which the first downlink signal is arranged; or This coincides with the meaning that the first terminal device has the ability to transmit both sidebands on the carrier on which the first downlink signal is located, or to transmit line code or spreading code modulated signals at a first frequency domain location and a second frequency domain location.

[0129] In the embodiment of this application, the first terminal device has the capability of transmitting an uplink signal at a first frequency domain position that is greater than the center frequency of the first downlink signal or a second frequency domain position that is less than the center frequency of the first downlink signal on the carrier on which the first downlink signal is located, as described below: The first terminal device has the capability of transmitting a single-sideband frequency-shifted signal on a carrier on which the first downlink signal is arranged; The first terminal device has the capability of transmitting only an uplink signal on a carrier on which the first downlink signal is arranged, the uplink signal having an upper sideband greater than the center frequency of the first downlink signal or a lower sideband less than the center frequency of the first downlink signal; The first terminal device has the capability of transmitting a modulated signal with a spectral efficiency of 1.0 on the carrier on which the first downlink signal is arranged; or This coincides with the meaning that the first terminal device has the ability to transmit a single sideband on the carrier on which the first downlink signal is located, or to transmit a line code or spreading code modulated signal only at the first frequency domain position.

[0130] For example, Figure 6A is Figure 1 showing a first terminal device transmitting an uplink signal when the first carrier is the carrier on which the first downlink signal is located. On the carrier on which the first downlink signal is located, the first terminal device may only offset the center frequency of the first downlink signal downward and transmit the uplink signal at a first frequency domain position obtained through the offset.

[0131] For example, Figure 6B is Figure 2 showing the first terminal device transmitting an uplink signal when the first carrier is the carrier on which the first downlink signal is located. On the carrier on which the first downlink signal is located, the first terminal device may offset the center frequency of the first downlink signal only upward and transmit the uplink signal at a second frequency domain position obtained through the offset.

[0132] For example, Figure 6C is Figure 3 showing an uplink signal transmitted by a first terminal device when a first carrier is a carrier on which a first downlink signal is arranged. On the carrier on which the first downlink signal is arranged, the first terminal device may individually offset the center frequency of the first downlink signal downward and upward, and transmit the uplink signal at a first frequency domain position obtained through the offset and a second frequency domain position obtained through the offset.

[0133] For ease of understanding, the following provides another explanation of the above example.

[0134] 6A, FIG. 6D is FIG. 4 showing a first terminal device transmitting an uplink signal when the first carrier is a carrier on which a first downlink signal is arranged. On the carrier on which the first downlink signal is arranged, the first terminal device may offset the lower sideband of the uplink signal downward without frequency shifting the downlink signal, and transmit the uplink signal at a first frequency domain position obtained through the offset.

[0135] 6B, FIG. 6E is FIG. 5 showing a first terminal device transmitting an uplink signal when the first carrier is a carrier on which the first downlink signal is located. On the carrier on which the first downlink signal is located, the first terminal device may offset the upper sideband of the uplink signal upward without frequency shifting the downlink signal, and transmit the uplink signal at a second frequency domain position obtained through the offset.

[0136] 6B, FIG. 6F is FIG. 6 illustrating an uplink signal transmitted by a first terminal device when a first carrier is a carrier on which a first downlink signal is arranged. On the carrier on which the first downlink signal is arranged, the first terminal device may offset the upper sideband and the lower sideband of the uplink signal upward and downward individually without frequency shifting relative to the downlink signal, and transmit the uplink signal at a first frequency domain position obtained through the offset and a second frequency domain position obtained through the offset.

[0137] Optionally, the first carrier is a carrier that is in the same frequency band as the carrier on which the first downlink signal is located and has a center frequency different from the center frequency of the carrier on which the first downlink signal is located. The first terminal device having the capability to transmit an uplink signal on the first carrier The first terminal device has the capability of transmitting an uplink signal on a first carrier having a frequency that is a first frequency offset higher than the center frequency of a carrier on which a first downlink signal is arranged, and a first carrier having a frequency that is a second frequency offset lower than the center frequency of a carrier on which a first downlink signal is arranged, wherein the first frequency offset and the second frequency offset are frequency offsets between the center frequency of the first carrier and the center frequency of a carrier on which a first downlink signal is arranged, and the first frequency offset and the second frequency offset have the same value; or The first terminal device has the capability to transmit an uplink signal on the first carrier at the first frequency offset or the second frequency offset. The first frequency offset is X RB and the second frequency offset is −X RB. In this solution, the frequency interval or frequency offset between the first downlink signal and the uplink signal is large, greater than the width of one carrier but smaller than the width of one frequency band. This solution can better prevent the problem of duplex interference occurring in the process of communication between the network device and the first terminal device. This helps improve the coverage performance of the uplink signal transmitted by the first terminal device. In addition, this solution can effectively utilize uplink spectrum resources, and more terminal devices can be supported to simultaneously transmit uplink signals. This helps improve spectrum resource utilization and increase the uplink transmission system capacity.

[0138] In an embodiment of this application, when the first carrier is a carrier that is in the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged, the following exchangeable descriptions exist:

[0139] The first terminal device having the capability to transmit an uplink signal on a first carrier may be replaced with the first terminal device having the capability to transmit an uplink signal on a first carrier obtained through a frequency offset.

[0140] The first terminal device having the capability to transmit an uplink signal on a first carrier at a first frequency offset or a second frequency offset may be replaced by the first terminal device having the capability to transmit an uplink signal on a first carrier that is a frequency offset away from one side or one end of the center frequency of the carrier on which the first downlink signal is located.

[0141] The capability of the first terminal device to transmit an uplink signal on a first carrier having a frequency that is a first frequency offset higher than the center frequency of the carrier on which the first downlink signal is located and on a first carrier having a frequency that is a second frequency offset lower than the center frequency of the carrier on which the first downlink signal is located can be replaced with the capability of the first terminal device to transmit an uplink signal on a first carrier that is on either side of the center frequency of the carrier on which the first downlink signal is located or that is separated from both ends by a frequency offset.

[0142] In the example embodiment of this application, when the subcarrier spacing is 15 kHz, 1 RB includes 12 subcarriers, that is, the bandwidth of 1 RB is 180 kHz.

[0143] For example, FIG. 7A is FIG. 1 of transmitting an uplink signal by a first terminal device when the first carrier is a carrier that is on the same frequency band as the carrier on which the first downlink signal is located and has a center frequency that is smaller than the center frequency of the carrier on which the first downlink signal is located. The center frequency of the first carrier is smaller than the center frequency of the carrier on which the first downlink signal is arranged, and the offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged is the first frequency offset. When the subcarrier spacing is 15 kHz, the value of the first frequency offset is -180 kHz, that is, the center frequency of the first carrier is offset by -1RB relative to the center frequency of the carrier on which the first downlink signal is arranged. In other words, the center frequency of the carrier on which the first downlink signal is arranged is f c and the center frequency of the first carrier is f c -180kHz.

[0144] For example, FIG. 7B is FIG. 2 of transmitting an uplink signal by a first terminal device when the first carrier is a carrier that is on the same frequency band as the carrier on which the first downlink signal is located and has a center frequency that is greater than the center frequency of the carrier on which the first downlink signal is located. The center frequency of the first carrier is greater than the center frequency of the carrier on which the first downlink signal is arranged, and the offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged is the second frequency offset. When the subcarrier spacing is 15 kHz, the value of the second frequency offset is +180 kHz, i.e., the center frequency of the carrier on which the uplink signal is arranged is offset by +1 RB relative to the center frequency of the carrier on which the first downlink signal is arranged. In other words, the center frequency of the carrier on which the first downlink signal is arranged is f c and the center frequency of the carrier on which the uplink signal is placed is f c +180kHz.

[0145] For example, FIG. 7C is FIG. 3 of transmitting an uplink signal by a first terminal device when the first carrier is within the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency greater than the center frequency of the carrier on which the first downlink signal is arranged and a center frequency less than the center frequency of the carrier on which the first downlink signal is arranged, respectively. The frequency offset is ±180 kHz, that is, the center frequencies of the two carriers on which the uplink signals are arranged are offset by +1RB and −1RB, respectively, with respect to the center frequency of the carrier on which the first downlink signal is arranged. In other words, the center frequency of the carrier on which the first downlink signal is arranged is f c and the center frequency of one of the carriers on which the uplink signal is placed is f c -180kHz, and the center frequency of the other carrier on which the uplink signal is placed is f c +180kHz.

[0146] Although the uplink signals shown in Figures 7A, 7B, and 7C are double-sideband signals, the uplink signals may alternatively be single-sideband signals. In addition, although the frequency offset of the carriers shown in Figures 7A, 7B, and 7C is 1 RB, the frequency offset may alternatively be 1 RB or a positive integer multiple of RB / 2. In other words, the frequency offset has a granularity of 1 RB or RB / 2. This is not a limitation in the embodiments of this application.

[0147] Optionally, a value of a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is located is less than or equal to a first threshold.

[0148] In an embodiment of this application, because there is a limit on the frequency of the low and intermediate frequency clock signals generated by the first terminal device, there may be an upper limit, i.e., a first threshold, on the offset value between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged. For example, the upper limit may be XRB, where X is a positive integer. Optionally, the first upper limit may include the first threshold. Optionally, the value of X may be a positive integer between 2 and 4.

[0149] Optionally, the first carrier is a carrier located on a different frequency band than that of the carrier on which the first downlink signal is located. The first terminal device has the capability to transmit an uplink signal on the first carrier. The first terminal device has the capability to transmit an uplink signal on a first carrier within an uplink frequency band of one or more frequency ranges; or The first terminal device has the capability of transmitting an uplink signal on a first carrier in a frequency band that is separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located. In this solution, the frequency interval or frequency offset between the first downlink signal and the uplink signal is large and is an inter-band frequency interval. In this solution, the problem of duplex interference occurring in the process of communication between the network device and the first terminal device can be completely prevented. This helps improve the coverage performance of the uplink signal transmitted by the first terminal device. In addition, in this solution, the spectrum resources of the uplink frequency range of the LTE or NR cellular network can be effectively utilized so that the transmission of the uplink signal complies with the relevant protocol of the cellular network.

[0150] In an embodiment of this application, when the first carrier is a carrier arranged on a frequency band different from that of the carrier on which the first downlink signal is arranged, the first terminal device having the ability to transmit an uplink signal on the first carrier may be replaced with the first terminal device having the ability to transmit an uplink signal on the first carrier obtained through a band-level frequency offset.

[0151] Optionally, the frequency band in which the carrier of the first downlink signal is located and the frequency band in which the first carrier is located are downlink and uplink frequency bands of a frequency division duplex FDD frequency range.

[0152] For example, FIG. 8 is a diagram illustrating transmitting an uplink signal by a first terminal device when the first carrier is a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located. The center frequency of the first downlink signal is f c and the carrier on which the first downlink signal is located is located within the FDD downlink frequency range. After the inter-band frequency offset is performed, the center frequency of the uplink signal is f c -45 MHz, and the carrier on which the uplink signal is located may be located within the FDD uplink frequency range.

[0153] Although the uplink signal shown in FIG. 8 is a double-sideband signal, the uplink signal may alternatively be a single-sideband signal. In addition, although the frequency interval between the frequency band in which the uplink signal is allocated and the frequency band in which the first downlink signal is allocated is 45 MHz in FIG. 8 , the frequency interval may alternatively have one or more other values. For example, in the n8 FDD frequency range, the frequency interval between the frequency band in which the uplink signal is allocated and the frequency band in which the first downlink signal is allocated is 45 MHz. In the n20 FDD frequency range, the frequency interval between the frequency band in which the uplink signal is allocated and the frequency band in which the first downlink signal is allocated is −41 MHz. In the n28 FDD frequency range, the interval between the frequency band in which the uplink signal is allocated and the frequency band in which the first downlink signal is allocated is 55 MHz, and the frequency band interval may be the offset value between the center frequency of the first carrier and the center frequency of the carrier in which the first downlink signal is allocated. This is not a limitation in the embodiments of this application.

[0154] In an embodiment of this application, communication between the network device and the first terminal device may be performed based on an FDD frequency range in an NR system. For example, an uplink signal is transmitted in an uplink FDD frequency range, and a downlink signal is transmitted in a downlink FDD frequency range. Furthermore, the communication method provided in the embodiment of this application can be used to improve compatibility with an LTE or NR system.

[0155] Optionally, the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in the random access process.

[0156] Step S502: The network device determines second information based on the first information.

[0157] The second information indicates a frequency domain resource utilized by the first terminal device to transmit the first uplink signal, i.e., a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier.

[0158] Optionally, the second information is: The information includes at least one of modulation and coding scheme (MCS) information, the number of frequency domain locations occupied by the first uplink signal, the frequency offset between the first uplink signal and the first downlink signal, the frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located, or the bandwidth of the first uplink signal. In this solution, the information included in the second information can be used by the first terminal device to determine the frequency domain location and frequency domain bandwidth of the first uplink signal, i.e., to determine the frequency domain resources occupied by the first uplink signal, and the number of occupied frequency domain locations is 1 or 2.

[0159] Optionally, the number of frequency domain locations occupied by the first uplink signal may be replaced with the spectral efficiency of the first uplink signal or the single-sideband or double-sideband information of the first uplink signal. When the number of occupied frequency domain locations is 1, the spectral efficiency of the corresponding first uplink signal is 1, or the first uplink signal is a single-sideband signal. When the number of occupied frequency domain locations is 2, the spectral efficiency of the corresponding first uplink signal is 0.5, or the first uplink signal is a double-sideband signal.

[0160] The MCS information may include a line code or spreading code coefficient and / or a time length of a unit modulation symbol. Optionally, the time length of a unit modulation symbol may also be described as a multiple of a time length of a unit chip, a time length of a line code chip, a time length of a symbol, or a time length of a reference modulation symbol. Optionally, the line code coefficient may also be described as a line code rate, a spreading code coefficient, a spreading code rate, a coding coefficient, or a code rate.

[0161] For example, when the first carrier is a carrier on which the first downlink signal is arranged, the second information may be modulation and coding scheme (MCS) information. The information included in the second information may be any row in Table 2, Table 3, or Table 4.

[0162] [Table 2]

[0163] [Table 3]

[0164] [Table 4]

[0165] Here, R denotes a multiple obtained by dividing the time length of a unit modulation symbol by the time length of a reference modulation symbol. The time length of a unit modulation symbol may be defined as R × Tari, where Tari represents the time length of a reference modulation symbol, e.g., Tari is equal to 3.125 μs. Here, M denotes a line code coefficient, and the line code rate is equal to (1 / 2)M. The MCS parameter configuration of R and M may be used by the first terminal device to determine the frequency offset between the center frequency of the first uplink signal and the center frequency of the first downlink signal and the bandwidth of the first uplink signal. Whether the first uplink signal at the occupied frequency domain position is a single-sided signal or a double-sided signal may be indicated directly based on a dedicated field in the indication information, or may be indicated together based on the spectral efficiency or frequency offset value in the MCS information. For example, a spectral efficiency of 1.0 in the MCS information indicates that the first uplink signal is a single-sideband signal or an uplink signal located at only one frequency domain position. A spectral efficiency of 0.5 in the MCS information indicates that the first uplink signal is a double-sideband signal or an uplink signal located at two frequencies. A frequency offset with a positive sign may indicate that the first uplink signal is an upper sideband signal of a double-sideband signal or occupies a frequency domain location greater than the center frequency of the first downlink signal. A frequency offset with a negative sign may indicate that the first uplink signal is a lower sideband signal of a double-sideband signal or occupies a frequency domain location less than the center frequency of the first downlink signal. A frequency offset with both positive and negative signs indicates that the first uplink signal is a double-side signal or occupies two frequency domain locations greater than and less than the center frequency of the first downlink signal, respectively, and the values ​​of the frequency offsets between the two frequency domain locations and the center frequency of the first downlink signal are equal.

[0166] Optionally, when the guard interval between the first carrier and the carrier of the NR uplink signal is smaller than XRB, or when the guard interval between the first carrier and the NR uplink scheduling signal is smaller than XRB and X is a positive integer, an MCS parameter with an M value that is in the MCS information and corresponds to a frequency domain position closest to the boundary of the first carrier is not configured for the first terminal device, or only an MCS index or parameter corresponding to the smallest M value that can be configured in the MCS information is configured for the first terminal device, for example, only an MCS index with M=1 in the MCS information is configured for the first terminal device. Optionally, in this case, the first terminal device and the terminal transmitting the NR uplink signal are located in the same site, the same coverage area, or the same paging area.

[0167] Optionally, the network device determines third information to be transmitted to the second terminal device. In response, the second terminal device receives the third information from the network device. The line code rate value in the MCS information included in the third information is different from the line code rate value in the MCS information included in the second information. Optionally, the difference between the line code rate value in the MCS information included in the third information and the line code rate value in the MCS information included in the second information is greater than a specific interval, i.e., the difference between the frequency domain position in the carrier corresponding to the parameter in the MCS information included in the second information and the frequency domain position in the carrier corresponding to the parameter in the MCS information included in the third information is greater than a specific frequency domain interval. For example, the MCS information included in the second information corresponds to MCS parameters with a line code rate value of M=1, as shown in the first column of Table 4. The MCS information included in the third information corresponds to MCS parameters with a line code rate value of M=4, as shown in the third row of Table 4. In this case, the MCS parameters corresponding to the line code rate value M=2 cannot be configured in the MCS information included in the third information, as shown in the second row of Table 4.

[0168] For example, when the first carrier is in the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency different from that of the carrier on which the first downlink signal is arranged, the second information may indicate the frequency domain location of the first carrier by indicating an offset value relative to the center frequency of the carrier on which the first downlink signal is arranged. For example, the information included in the second information may be any row in Table 5.

[0169] [Table 5]

[0170] In Table 5, f c indicates the center frequency of the first carrier, and the center frequency offset is the first frequency offset and / or the second frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged. Here, a frequency offset of 1 RB is used as an example. Optionally, the frequency domain location of the first carrier may be indicated based on a dedicated field in the indication information. Then, the frequency domain location of the first uplink signal on the first carrier may be indicated in a manner indicating the frequency domain location of the uplink signal on the first carrier when the first carrier is the carrier on which the first downlink signal is arranged, as shown in Table 3. Optionally, the frequency domain location of the first carrier may be indicated together based on the indication information. The status information indicates both the location of the first carrier and the frequency domain location of the first carrier, as shown in Table 5. The value of the frequency offset of the frequency domain location on the carrier is determined relative to the center frequency of the first carrier.

[0171] Generally, the frequency offset included in the second information and between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged is less than or equal to a first threshold. For example, the first threshold is XRB, and the value of the frequency offset included in the second information is in the interval [-XRB, XRB]. The value of X is a positive integer. Optionally, the value of X is equal to 2 or 3.

[0172] With respect to Table 4, the information included in the second information may alternatively be any row of Table 6.

[0173] [Table 6]

[0174] Here, R and M may be used by the first terminal device to determine the frequency location of the first uplink signal on the first carrier and the bandwidth of the first uplink signal.

[0175] When the first carrier is a carrier arranged on a frequency band different from that of the carrier on which the first downlink signal is arranged, the second information may indicate a frequency band on which the first uplink signal is arranged or a frequency interval between the center frequency of the first carrier and the carrier on which the first downlink signal is arranged. In addition to independently indicating the frequency band on which the first downlink signal is arranged, the second information may jointly indicate information about the first carrier on the frequency band and information about the frequency offset of the first uplink signal on the first carrier.

[0176] Step S503: The network device sends the second information to the first terminal device, and correspondingly, the first terminal device receives the second information from the network device.

[0177] Optionally, the network device transmits the third information to the second terminal device, and in response, the second terminal device receives the third information from the network device.

[0178] Optionally, the second information may be carried in a paging message, a message Msg4 in a random access process, downlink control information (DCI), a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal.

[0179] For example, the second information may be carried on a physical downlink shared channel (PDSCH). Furthermore, the downlink information may be carried in a paging message on the PDSCH or in Msg4 in a random access process.

[0180] For example, the second information may be carried in a DCI, which may be used to schedule a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH), or may be used to simultaneously schedule a PDSCH and a PUSCH. Furthermore, the DCI may be used to schedule an Msg4 or a paging message.

[0181] For example, the second information may be carried in a preamble signal, a reference signal, or a calibration signal corresponding to the PDSCH. Furthermore, the second information may be carried in a time-domain cover code of the preamble signal. Alternatively, the second information may be represented by the number of time-domain repetitions of a base signal of the preamble signal, a combination of preamble signals with different time domains, or a combination of a base signal and a negated signal of the base signal. Alternatively, the second information may be represented by different time lengths of unit modulation symbols, or unit lengths of high or low levels in the reference signal or the calibration signal.

[0182] Step S504: The first terminal device transmits a first uplink signal to the network device on the frequency domain resource indicated by the second information, where the first uplink signal is a signal obtained by the first terminal device through modulating the first downlink signal or the first uplink signal is a signal generated by the first terminal device, and correspondingly, the network device receives the first uplink signal from the first terminal device on the frequency domain resource indicated by the second information.

[0183] Optionally, the second terminal device transmits a second uplink signal to the network device on the frequency domain resource indicated by the third information, and in response, the network device receives the second uplink signal from the second terminal device on the frequency domain resource indicated by the third information.

[0184] In an embodiment of this application, the first terminal device may reflect the received first downlink signal. Specifically, the first terminal device modulates the received first downlink signal based on the modulation information and reflects the modulated first downlink signal. The reflected modulated first downlink signal is the first uplink signal. Alternatively, the first terminal device may actively generate a first uplink signal without reflection, and the first uplink signal is not associated with the downlink signal received by the first terminal device.

[0185] Optionally, the second information may indicate a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier. The second information may include MCS information, which may include a line code coefficient and / or a time length of a unit modulation symbol. The second information may further include information about the number of frequency domain locations occupied by the first uplink signal or sidebands occupied by the first uplink signal. The frequency domain location of the first uplink signal is a first frequency domain location greater than the center frequency of the first downlink signal or a second frequency domain location less than the center frequency of the first downlink signal, or the frequency domain location of the first uplink signal is a first frequency domain location greater than the center frequency of the first downlink signal and a second frequency domain location less than the center frequency of the first downlink signal. The MCS information implicitly indicates the frequency domain location and frequency domain bandwidth of the first uplink signal on the first carrier to the first terminal device. The first terminal device determines, based on the MCS information, a value of a frequency offset between the first frequency domain location or the second frequency domain location and the center frequency of the first downlink signal, and a bandwidth of the first uplink signal. The number of frequency domain locations occupied by the first uplink signal may alternatively be replaced with the spectral efficiency of the first uplink signal. When the number of frequency domain locations occupied by the first uplink signal is 1, the spectral efficiency of the first uplink signal is 1.0. When the number of frequency domain locations occupied by the first uplink signal is 2, the spectral efficiency of the first uplink signal is 0.5. The number of frequency domain locations occupied by the first uplink signal may alternatively be replaced with a frequency offset between the first uplink signal and the first downlink signal. When the number of frequency domain locations occupied by the first uplink signal is 1, the frequency offset between the first downlink signal and the first downlink signal is a positive or negative number. When the number of frequency domain locations occupied by the first uplink signal is two, the frequency offset between the first uplink signal and the first downlink signal is a positive number and a negative number.

[0186] For example, the second information is the second row of Table 2, i.e., R=32, M=2, and the spectral efficiency is 1.0. When the first terminal device has the capability to transmit an upper sideband signal, the first terminal device may determine a specific frequency domain location and frequency domain bandwidth of the first uplink signal on the carrier on which the first downlink signal is located based on R=32 and M=2. For a specific determination method, please refer to the prior art. The details will not be described again here. Then, the first terminal device may transmit a first uplink signal. Here, the first uplink signal is an upper sideband signal. The above only uses an example in which the first uplink signal and the first downlink signal are located on the same carrier for explanation. This example does not constitute any limitation on this application. In fact, the first terminal device may determine a specific frequency domain location and frequency domain bandwidth of the first uplink signal on the first carrier based on R=32 and M=2.

[0187] Optionally, the second information further indicates a frequency domain location of the first carrier, and the second information further includes a frequency offset between a center frequency of the first carrier and a center frequency of a carrier on which the first downlink signal is located. The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset, or The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by a first frequency domain offset and is smaller than the center frequency of the carrier on which the first downlink signal is arranged by a second frequency offset; or the first carrier is located within an uplink frequency band of one or more frequency ranges; or The first carrier is located in a frequency band that is different from and separated by one or more frequency intervals from the frequency band of the carrier on which the first downlink signal is located. In this solution, the first terminal device can determine a frequency domain position of the first carrier on which the first uplink signal is to be located based on the center frequency of the carrier on which the first downlink signal is to be located and a frequency offset or frequency interval included in the second information and between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is to be located, and thereby the first terminal device can transmit the first uplink signal on the first carrier.

[0188] For example, the second information is the second row of Table 4, that is, the carrier frequency offset is +180 kHz. The first terminal device may determine the frequency domain position of the first carrier on which the first downlink signal is located based on the center frequency of the carrier on which the first downlink signal is located and which has a carrier frequency offset of +180 kHz, so that the first terminal device may transmit the first uplink signal on the first carrier.

[0189] For example, the second information is the second row of Table 5, i.e., the carrier frequency offset is +180 kHz, R=32, and M=2. The first terminal device may determine the frequency domain location of the first carrier on which the first uplink signal is located based on the center frequency of the carrier on which the first downlink signal is located and which has a carrier frequency offset of +180 kHz, and may determine the specific frequency domain location and frequency domain bandwidth of the first uplink signal on the first carrier based on R=32 and M=2. Thus, the first terminal device may transmit the first uplink signal on the first carrier.

[0190] The above merely provides an example of a manner in which the first terminal device determines a frequency domain resource for transmitting the first uplink signal based on the second information, but the second information may further include other information different from the above example, and therefore the above example does not constitute any limitation thereon.

[0191] In an embodiment of this application, based on first information reported by a first terminal device and indicating that the first terminal device has the capability to transmit an uplink signal on a first carrier, the network device may allocate frequency domain resources to the first terminal device that meet the capabilities of the first terminal device and are utilized to transmit the first uplink signal. When multiple first terminal devices exist, the network device may flexibly schedule frequency domain resources for transmitting the multiple first uplink signals, so that the frequency domain resources for the multiple first uplink signals do not overlap, and can accommodate as many first terminal devices with different capabilities as possible to maximize the uplink transmission capacity. In addition, the center frequency of the uplink signal is different from the center frequency of the first downlink signal. Therefore, when the network device demodulates the first uplink signal, it can prevent co-channel interference caused by transmitting the first downlink signal, which helps improve uplink coverage.

[0192] Both the network device and the first terminal device in the above embodiments may utilize the architecture of the communication device 400 shown in Fig. 4. Therefore, the processor 401 in the communication device 400 shown in Fig. 4 may call application program code stored in the memory 403 to instruct the network device to perform actions of the network device in the above embodiments, and the processor 401 in the communication device 400 shown in Fig. 4 may call application program code stored in the memory 403 to instruct the first terminal device to perform actions of the first terminal device in the above embodiments. This is not limited to the embodiments.

[0193] In the above embodiments, it may be understood that the methods and / or steps performed by the network device may alternatively be performed by components (e.g., chips or circuits) available within the network device. The methods and / or steps performed by the first terminal device may alternatively be performed by components (e.g., chips or circuits) available within the first terminal device. The methods and / or steps performed by the second terminal device may alternatively be performed by components (e.g., chips or circuits) available within the second terminal device.

[0194] The above describes the solutions provided in the embodiments of this application mainly from the perspective of interactions between network elements. Correspondingly, the embodiments of this application further provide a communication device, which is configured to implement the above method. The communication device may be a network device in the above method embodiment, a device including the above network device, or a component available within the network device. Alternatively, the communication device may be a first terminal device in the above method embodiment, a device including the above first terminal device, or a component available within the first terminal device. Alternatively, the communication device may be a second terminal device in the above method embodiment, a device including the above second terminal device, or a component available within the second terminal device. To realize the above functions, it can be understood that the communication device includes a hardware structure and / or software modules for performing corresponding functions. Those skilled in the art should easily realize that, in combination with the example units and algorithm steps described in the embodiments disclosed in this specification, this application can be realized by hardware or a combination of hardware and computer software. Whether the functions are implemented by hardware or hardware driven by computer software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but the implementation should not be considered as going beyond the scope of this application.

[0195] In the embodiments of this application, the communication device may be divided into functional modules based on the above method embodiments. For example, the functional modules may be obtained through division based on corresponding functions, or two or more functions may be integrated into one processing module. The integrated module may be implemented in the form of hardware or in the form of a software function module. It should be noted that in the embodiments of this application, the division into modules is an example and is merely a logical function division. In actual implementation, other division methods may be used.

[0196] 9 is a diagram of the structure of a communication device 90. The communication device 90 includes a transceiver module 901. The transceiver module 901 may also be referred to as a transceiver unit, and is configured to implement transceiver functionality, and may be, for example, a transceiver, a transceiver circuit, a transceiver machine, or a communication interface.

[0197] For example, the communication device 90 is the network device in the above method embodiment. In this case, the communication device 90 further includes a processing module 902. The transceiver module 901 receives first information from a first terminal device, The first information indicates that the first terminal device has the ability to transmit an uplink signal on a first carrier, and the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers, namely: a carrier on which the first downlink signal is located; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; The present invention is configured to perform one of the following: The processing module 902 is configured to determine second information based on the first information, the second information indicating frequency domain resources utilized by the first terminal device to transmit a first uplink signal, the first uplink signal being a signal obtained by the first terminal device through modulating a first downlink signal, or the first uplink signal being a signal generated by the first terminal device. The transceiver module 901 is further configured to transmit the second information to the first terminal device.

[0198] For example, the communication device 90 is the first terminal device in the above method embodiment. The transceiver module 901 transmits first information to the network device, The first information indicates that the first terminal device has the ability to transmit an uplink signal on a first carrier, and the center frequency of the uplink signal is different from the center frequency of the first downlink signal, and the first carrier is one of the following carriers, namely: a carrier on which the first downlink signal is located; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; The present invention is configured to perform one of the following: The transceiver module 901 is further configured to receive second information from the network device and transmit a first uplink signal to the network device on a frequency domain resource indicated by the second information, wherein the first uplink signal is a signal obtained through modulating a first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device.

[0199] All relevant contents of the steps in the above method embodiments can be referred to in the functional descriptions of the corresponding functional modules, and the details will not be described again here.

[0200] In this embodiment, communication device 90 is shown in a unified manner in the form of functional modules obtained through division, where a "module" may be an ASIC, a circuit, a processor executing one or more software or firmware programs, a memory, an integrated logic circuit, and / or other component capable of providing the functionality described above.

[0201] When the communication device 90 is a network device or a first terminal device in the above method embodiments, in a simple embodiment, those skilled in the art will understand that the communication device 90 may be in the form of the communication device 400 shown in FIG. 4.

[0202] For example, the processor 401 or 407 in the communication device 400 shown in Figure 4 may call computer-executable instructions stored in the memory 403 to enable the communication device 400 to perform the communication method in the above method embodiments. Specifically, the functions / implementation processes of the processing module 902 in Figure 9 may be realized by the processor 401 or 407 in the communication device 400 shown in Figure 4 by calling computer-executable instructions stored in the memory 403. The functions / implementation processes of the transceiver module 901 in Figure 9 may be implemented through a communication module connected to the communication interface 404 in Figure 4.

[0203] The communication device 90 provided in this embodiment can implement the above-mentioned communication method. Therefore, for the technical effects that can be achieved by the communication device 90, please refer to the above-mentioned method embodiment, and they will not be described again here.

[0204] It should be noted that one or more of the above modules or units may be implemented using software, hardware, or a combination thereof. When any one of the above modules or units is implemented by software, the software exists in the form of computer program instructions and is stored in a memory. A processor may be configured to execute the program instructions and perform the above method steps. The processor may be incorporated in a system on a chip (SoC) or an ASIC, or may be an independent semiconductor chip. In addition to a core configured to perform operations or processes by executing software instructions, the processor may further include necessary hardware accelerators, such as a field programmable gate array (FPGA), a programmable logic device (PLD), or logic circuits that perform dedicated logic operations.

[0205] When the above modules or units are realized using hardware, the hardware may be any one or combination of a CPU, microprocessor, digital signal processing (DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, SoC, FPGA, PLD, dedicated digital circuitry, hardware accelerator, or non-integrated discrete device, and the hardware may execute necessary software or may not depend on software to perform the above method steps.

[0206] Optionally, the embodiments of this application further provide a chip system including at least one processor and an interface, wherein the at least one processor is coupled to a memory through the interface, and the method in any one of the above method embodiments is performed when the at least one processor executes a computer program or instructions in the memory. In a possible implementation, the communication device further includes a memory. Optionally, the chip system may include a chip, or may include a chip and another separate device. This is not particularly limited in the embodiments of this application.

[0207] All or part of the above embodiments may be realized using software, hardware, firmware, or any combination thereof. When a software program is used to implement an embodiment, the embodiment may be fully or partially implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of this application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio wave, or microwave) transmission. The computer-readable storage medium may be any available medium that can be accessed by a computer, or may be a data storage device such as a server or data center that consolidates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, or magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid state disks (SSDs)).

[0208] Although this application has been described in connection with embodiments, in the process of implementing this application for which protection is claimed, those skilled in the art may understand and realize other variations of the disclosed embodiments, from a study of the accompanying drawings, the disclosure, and the appended claims. In the claims, "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit may fulfill several functions recited in a claim. Although several measures are recited in mutually different dependent claims, this does not indicate that these measures cannot be combined to produce better effects.

[0209] Although this application has been described with reference to specific features and embodiments thereof, it is clear that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Correspondingly, the specification and the accompanying drawings are merely exemplary descriptions of this application as defined by the appended claims, and any or all modifications, variations, combinations, or equivalents covering the scope of this application are deemed to be included. It is clear that those skilled in the art can make various modifications and variations of this application without departing from the spirit and scope of this application. Thus, this application is intended to cover these modifications and variations of this application as long as they fall within the scope of protection defined by the following claims and their equivalent technologies.

Claims

1. receiving, by a network device, first information from a first terminal device, the first information indicating that the first terminal device has the capability to transmit an uplink signal on a first carrier, the center frequency of the uplink signal being different from the center frequency of a first downlink signal, and the first carrier being one of the following carriers: a carrier on which the first downlink signal is arranged; A carrier that is on the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency different from the center frequency of the carrier on which the first downlink signal is arranged, or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; and determining, by the network device, second information based on the first information and transmitting the second information to the first terminal device, wherein the second information indicates a frequency domain resource utilized by the first terminal device to transmit a first uplink signal, the first uplink signal being a signal obtained through modulating the first downlink signal by the first terminal device, or the first uplink signal being a signal generated by the first terminal device; A communication method, including:

2. The first terminal device having the capability to transmit an uplink signal on the first carrier may The first terminal device has the capability to transmit the uplink signal at a first frequency domain location greater than the center frequency of the first downlink signal on the first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first carrier is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first carrier; or the first terminal device having the capability to transmit the uplink signal at the first frequency domain location or the second frequency domain location on the first carrier; Including, The method of claim 1.

3. the first carrier is a carrier that is in the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged; The first terminal device having the capability to transmit an uplink signal on the first carrier may The first terminal device has the capability of transmitting the uplink signal on the first carrier having a frequency that is a first frequency offset higher than the center frequency of the carrier on which the first downlink signal is arranged, and on the first carrier having a frequency that is a second frequency offset lower than the center frequency of the carrier on which the first downlink signal is arranged, The first frequency offset and the second frequency offset are frequency offsets between a center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged, and the values ​​of the first frequency offset and the second frequency offset are the same; or the first terminal device having the capability to transmit the uplink signal on the first carrier at the first frequency offset or the second frequency offset; Including, 3. The method according to claim 1 or 2.

4. the values ​​of the first frequency offset and the second frequency offset are less than or equal to a first threshold. The method of claim 3.

5. the first carrier is the carrier arranged on the frequency band different from that of the carrier on which the first downlink signal is arranged; The first terminal device having the capability to transmit an uplink signal on the first carrier may The first terminal device has the capability to transmit the uplink signal on the first carrier within an uplink frequency band of one or more frequency ranges; or the first terminal device having the capability of transmitting the uplink signal on the first carrier in a frequency band that is spaced apart by one or more frequency intervals from a frequency band of the carrier on which the first downlink signal is located; Including, The method according to any one of claims 1 to 4.

6. the frequency band in which the carrier of the first downlink signal is arranged and the frequency band in which the first carrier is arranged are two frequency bands in a frequency division duplex frequency range; The method of claim 5.

7. the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in a random access process; The method according to any one of claims 1 to 6.

8. The second information is: the number of frequency domain locations occupied by the first uplink signal; a frequency offset between the first uplink signal and the first downlink signal; a frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; or the bandwidth of the first uplink signal at least one of: The method according to any one of claims 1 to 7.

9. The second information is carried in a paging message, Msg4 in a random access process, downlink control information (DCI), a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal. The method according to any one of claims 1 to 8.

10. the second information indicates a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier, the second information including modulation and coding scheme (MCS) information and / or the number of frequency domain locations occupied by the first uplink signal; the number of frequency domain locations occupied by the first uplink signal is 1 or 2, and the MCS information is utilized by the first terminal device to determine a value of a frequency offset between the first frequency domain location and / or the second frequency domain location and the center frequency of the first downlink signal, and the bandwidth of the first uplink signal. The method according to any one of claims 1 to 9.

11. the MCS information includes a line code or spreading code coefficient value of the first uplink signal and / or a modulation symbol length of the first uplink signal; The method of claim 10.

12. the second information further indicates a frequency domain location of the first carrier, and the second information further includes the frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by the first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by the second frequency offset, or The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by the first frequency offset and is a frequency that is less than the center frequency of the carrier on which the first downlink signal is arranged by the second frequency offset; or the first carrier is located within an uplink frequency band of one or more frequency ranges; or the first carrier is located in a frequency band that is different from the frequency band of the carrier on which the first downlink signal is located and that is separated from that frequency band by one or more frequency intervals; 12. The method according to claim 10 or 11.

13. transmitting, by a first terminal device, first information to a network device, the first information indicating that the first terminal device has the capability to transmit an uplink signal on a first carrier, the center frequency of the uplink signal being different from the center frequency of a first downlink signal, and the first carrier being one of the following carriers: a carrier on which the first downlink signal is arranged; A carrier that is on the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency different from the center frequency of the carrier on which the first downlink signal is arranged, or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; and receiving, by the first terminal device, second information from the network device and transmitting a first uplink signal to the network device on a frequency domain resource indicated by the second information, wherein the first uplink signal is a signal obtained by modulating the first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device; A communication method, including:

14. The first terminal device having the capability to transmit an uplink signal on the first carrier includes: The first terminal device has the capability to transmit the uplink signal at a first frequency domain location greater than the center frequency of the first downlink signal on the first carrier and at a second frequency domain location less than the center frequency of the first downlink signal on the first carrier, wherein a value of a frequency domain offset between the first frequency domain location and the center frequency of the first carrier is the same as a value of a frequency domain offset between the second frequency domain location and the center frequency of the first carrier; or the first terminal device having the capability to transmit the uplink signal at the first frequency domain location or the second frequency domain location on the first carrier; Including, The method of claim 13.

15. the first carrier is a carrier that is in the same frequency band as the carrier on which the first downlink signal is arranged and has a center frequency that is different from the center frequency of the carrier on which the first downlink signal is arranged; The first terminal device having the capability to transmit an uplink signal on the first carrier includes: The first terminal device has the capability to transmit the uplink signal on the first carrier having a frequency that is a first frequency offset higher than the center frequency of the carrier on which the first downlink signal is arranged, and on the first carrier having a frequency that is a second frequency offset lower than the center frequency of the carrier on which the first downlink signal is arranged, wherein the first frequency offset and the second frequency offset are frequency offsets between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is arranged, and the values ​​of the first frequency offset and the second frequency offset are the same; or the first terminal device having the capability to transmit the uplink signal on the first carrier at the first frequency offset or the second frequency offset; Including, 15. The method of claim 13 or 14.

16. the values ​​of the first frequency offset and the second frequency offset are less than or equal to a first threshold.

16. The method of claim 15.

17. The first carrier is the carrier arranged on the frequency band different from that of the carrier on which the first downlink signal is arranged, and the first terminal device has the ability to transmit an uplink signal on the first carrier, The first terminal device has the capability to transmit the uplink signal on the first carrier within an uplink frequency band of one or more frequency ranges; or the first terminal device having the capability of transmitting the uplink signal on the first carrier in a frequency band that is spaced apart by one or more frequency intervals from a frequency band of the carrier on which the first downlink signal is located; Including, The method according to any one of claims 13 to 16.

18. the frequency band in which the carrier of the first downlink signal is arranged and the frequency band in which the first carrier is arranged are two frequency bands in a frequency division duplex frequency range; 18. The method of claim 17.

19. the first information is carried in a message Msg1 or Msg3 sent by the first terminal device in a random access process; The method according to any one of claims 13 to 18.

20. The second information is: the number of frequency domain locations occupied by the first uplink signal; a frequency offset between the first uplink signal and the first downlink signal; a frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; or the bandwidth of the first uplink signal at least one of: The method according to any one of claims 13 to 19.

21. The second information is carried in a paging message, Msg4 in a random access process, downlink control information (DCI), a signal carrying a broadcast message, a preamble signal, a reference signal, or a calibration signal. The method according to any one of claims 13 to 20.

22. the second information indicates a frequency domain location and a frequency domain bandwidth of the first uplink signal on the first carrier, the second information including modulation and coding scheme (MCS) information and / or the number of frequency domain locations occupied by the first uplink signal; the number of frequency domain locations occupied by the first uplink signal is 1 or 2, and the MCS information is utilized by the first terminal device to determine a value of a frequency offset between the first frequency domain location and / or the second frequency domain location and the center frequency of the first downlink signal, and the bandwidth of the first uplink signal. The method according to any one of claims 13 to 21.

23. the MCS information includes a line code or spreading code coefficient value of the first uplink signal and / or a modulation symbol length of the first uplink signal; 23. The method of claim 22.

24. the second information further indicates a frequency domain location of the first carrier, and the second information further includes the frequency offset between the center frequency of the first carrier and the center frequency of the carrier on which the first downlink signal is located; The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by the first frequency offset, or a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by the second frequency offset, or The center frequency of the first carrier is within the frequency band of the carrier on which the first downlink signal is arranged, and is a frequency that is greater than the center frequency of the carrier on which the first downlink signal is arranged by the first frequency offset and is a frequency that is smaller than the center frequency of the carrier on which the first downlink signal is arranged by the second frequency offset, or the first carrier is located within an uplink frequency band of one or more frequency ranges; or the first carrier is located in a frequency band that is different from the frequency band of the carrier on which the first downlink signal is located and that is separated from that frequency band by one or more frequency intervals; 24. The method of claim 22 or 23.

25. A network device, the network device including a transceiver module and a processing module; The transceiver module receives first information from a first terminal device, The first information indicates that the first terminal device has the capability to transmit an uplink signal on a first carrier, the center frequency of the uplink signal being different from the center frequency of a first downlink signal, and the first carrier being one of the following carriers: a carrier on which the first downlink signal is arranged; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; and The processing module is configured to determine second information based on the first information, the second information indicating a frequency domain resource utilized by the first terminal device to transmit a first uplink signal, the first uplink signal being a signal obtained by modulating the first downlink signal by the first terminal device, or the first uplink signal being a signal generated by the first terminal device; The network device, wherein the transceiver module is further configured to transmit the second information to the first terminal device.

26. a first terminal device, the first terminal device including a transceiver module; The transceiver module transmits first information to a network device, The first information indicates that the first terminal device has the capability to transmit an uplink signal on a first carrier, the center frequency of the uplink signal being different from the center frequency of a first downlink signal, and the first carrier being one of the following carriers: a carrier on which the first downlink signal is arranged; a carrier on the same frequency band as the carrier on which the first downlink signal is located and whose center frequency is different from the center frequency of the carrier on which the first downlink signal is located; or a carrier located on a frequency band different from that of the carrier on which the first downlink signal is located; and The transceiver module is further configured to receive second information from the network device and transmit a first uplink signal to the network device on a frequency domain resource indicated by the second information, wherein the first uplink signal is a signal obtained through modulating the first downlink signal by the first terminal device, or the first uplink signal is a signal generated by the first terminal device. A first terminal device.

27. A communication system comprising a network device and a first terminal device, wherein the network device is configured to perform the communication method according to any one of claims 1 to 12, and the first terminal device is configured to perform the communication method according to any one of claims 13 to 24.

28. A communication device comprising a memory and a processor coupled to the memory, wherein the memory is configured to store a program, and the processor is configured to execute the program stored in the memory, and when the communication device is operating, the processor executes the program, thereby causing the communication device to perform a communication method according to any one of claims 1 to 12, or the communication device to perform a communication method according to any one of claims 13 to 24.

29. A computer-readable storage medium storing a computer program or instructions, the computer-readable storage medium performing the communication method according to any one of claims 1 to 12, or performing the communication method according to any one of claims 13 to 24, when the computer program or the instructions are executed.

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