Wireless communication method, network device, and terminal device

Abstract

An embodiment of the present application provides a wireless communication method and device, which can improve communication performance in terms of the deployment and use processing of frequency bands. The method includes: a network device determines a first uplink carrier, where the first uplink carrier is an uplink carrier among multiple uplink carriers available for a terminal device; the network device sends first information to the terminal device, and the first information indicates that the terminal device uses or can use the first uplink carrier for uplink transmission, or processes the first uplink carrier.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly, to a wireless communication method, a network device, and a terminal device. Background Art

[0002] In a Long Term Evolution (LTE) system, there is a fixed uplink carrier and a fixed downlink carrier. The terminal device and the network can use the fixed uplink carrier and downlink carrier to perform uplink and downlink communications respectively.

[0003] In future communication systems, there are relatively high requirements for communication performance.

[0004] Therefore, how to improve communication performance in terms of frequency band deployment and usage processing is an urgent problem to be solved. Summary of the Invention

[0005] Embodiments of this application provide a wireless communication method and device, which can improve communication performance in terms of frequency band deployment and usage processing.

[0006] In a first aspect, a wireless communication method is provided, including:

[0007] The network device determines a first uplink carrier, where the first uplink carrier is an uplink carrier among multiple uplink carriers available for the terminal device;

[0008] The network device sends first information to the terminal device, where the first information indicates that the terminal device adopts or can adopt the first uplink carrier for uplink transmission, or processes the first uplink carrier.

[0009] Therefore, in the embodiments of this application, there are multiple uplink carriers available for the uplink transmission of the terminal device, and the network device can indicate the use or processing of the uplink carriers among the multiple uplink carriers, thereby increasing the flexibility of the uplink transmission of the terminal device and improving communication performance.

[0010] In combination with the first aspect, in a possible implementation manner of the first aspect, the network device sending the first information to the terminal device includes:

[0011] The network device sends the first information to multiple terminal devices through broadcast signaling, or Remaining Minimum System Information (RMSI), or system information.

[0012] In combination with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the network device sending the first information to the terminal device includes:

[0013] The network device sends the first information to a single one of the terminal devices through high-layer signaling.

[0014] In another possible implementation manner of the first aspect, in combination with the first aspect or any of the above possible implementation manners, the first information instructs the terminal device to perform uplink transmission using the first uplink carrier;

[0015] The method further includes:

[0016] The network device sends second information to the terminal device, and the second information is used to activate or configure the first uplink carrier for the terminal device.

[0017] In another possible implementation manner of the first aspect, in combination with the first aspect or any of the above possible implementation manners, the first information is carried in downlink control information DCI.

[0018] In another possible implementation manner of the first aspect, in combination with the first aspect or any of the above possible implementation manners, the method further includes:

[0019] The network device determines a second uplink carrier from multiple uplink carriers available for the terminal device;

[0020] The network device sends third information to the terminal device, and the third information instructs the terminal device to perform uplink transmission using the second uplink carrier; wherein,

[0021] The sending of the first information and the sending of the third information are respectively in different scheduling processes of scheduling the terminal device after the first uplink carrier is activated or configured.

[0022] In another possible implementation manner of the first aspect, in combination with the first aspect or any of the above possible implementation manners, the first information instructs the terminal device to perform uplink transmission using the first uplink carrier;

[0023] The method further includes:

[0024] The network device determines a third uplink carrier, and the third uplink carrier is a link carrier among the multiple uplink carriers that is not the first uplink carrier;

[0025] The network device sends fourth information to the terminal device, and the fourth information instructs the terminal device to perform uplink transmission using the third uplink carrier, so that the terminal device stops using the first uplink carrier and uses the third uplink carrier for uplink transmission.

[0026] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the uplink transmission is a Physical Uplink Control Channel (PUCCH) transmission or a Physical Uplink Shared Channel (PUSCH) transmission.

[0027] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the first information is carried in the information related to the Sounding Reference Signal (SRS);

[0028] The first information indicates that the terminal device uses the first uplink carrier to transmit the SRS.

[0029] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the first information is carried in the SRS configuration information for semi-statically configuring the SRS; or

[0030] The first information is carried in the triggering message for dynamically triggering the SRS.

[0031] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the first information is carried in the configuration information for the random access procedure;

[0032] The first information indicates that the terminal device uses or can use the first uplink carrier for the random access procedure.

[0033] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the configuration information indicates the frequency domain position of the random access resource relative to the carrier position of the reference carrier.

[0034] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the reference carrier position is the carrier position of the first uplink carrier; or,

[0035] The reference carrier position is the carrier position of another uplink carrier among the multiple uplink carriers that is not the first uplink carrier; or

[0036] The reference carrier position is the carrier position of the downlink carrier of the terminal device.

[0037] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the configuration signaling to which the configuration information belongs is further used to indicate: the random access resource and / or the random access code for the random access procedure of at least one second uplink carrier.

[0038] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the method further includes:

[0039] The network device sends indication information to the terminal device, and the indication information indicates parameters for selecting an uplink carrier during random access.

[0040] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the parameters are used for the terminal device to determine a downlink DL signal threshold corresponding to the uplink carrier, and are used for the terminal device to select a corresponding uplink carrier for the random access process according to the relationship between the DL signal measurement result and the DL signal threshold.

[0041] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the indication information is carried in the configuration signaling to which the configuration information belongs; or, the indication information is sent through broadcast signaling, or RMSI, or system information.

[0042] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the random access process is a contention-free random access process.

[0043] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the first information is carried in a command for timing adjustment, or carried in the transmission of a command for timing adjustment, and the first information is used to indicate timing adjustment for the first uplink carrier.

[0044] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the first information is carried in a field included in a command for timing adjustment; or,

[0045] The first information is indicated by processing information of a physical layer channel for carrying the command for timing adjustment.

[0046] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the first information is carried in the power adjustment information of the terminal device, or carried in the transmission of the power adjustment information, and the first information is used to indicate power adjustment for the first uplink carrier.

[0047] Combined with the first aspect or any of the above possible implementation manners, in another possible implementation manner of the first aspect, the multiple uplink carriers available for the terminal device are respectively in multiple different frequency bands.

[0048] In another possible implementation manner of the first aspect, in combination with the first aspect or any of the above possible implementation manners, the frequency band of the first uplink carrier is lower than the frequency bands of other uplink carriers.

[0049] Second aspect, a wireless communication method is provided, including:

[0050] The network device receives a power headroom report reported by the terminal device for a plurality of uplink carriers available for the terminal device.

[0051] Therefore, in the embodiments of the present application, the terminal device determines a power headroom report based on a plurality of uplink carriers available for the terminal device, and sends the power headroom report to the network device, so that the network device can use the power headroom report to schedule the plurality of uplink carriers available for the terminal device for the terminal device.

[0052] In a possible implementation manner of the second aspect, in combination with the second aspect, the power headroom report includes power headroom reports independently reported by the terminal device for each of the plurality of uplink carriers.

[0053] In another possible implementation manner of the second aspect, in combination with the second aspect or any of the above possible implementation manners, the power headroom report includes a power headroom report reported by the terminal device taking the plurality of uplink carriers as a whole.

[0054] In another possible implementation manner of the second aspect, in combination with the second aspect or any of the above possible implementation manners, the plurality of uplink carriers available for the terminal device are respectively in a plurality of different frequency bands.

[0055] Third aspect, a wireless communication method is provided, including:

[0056] The terminal device receives first information sent by the network device, where the first information indicates that the terminal device uses or is capable of using a first uplink carrier for uplink transmission, or processes the first uplink carrier, and the first uplink carrier is an uplink carrier among the plurality of uplink carriers available for the terminal device;

[0057] According to the first information, use or select to use the first uplink carrier for uplink transmission, or process the first uplink carrier.

[0058] In a possible implementation manner of the third aspect, in combination with the third aspect, the terminal device receiving the first information sent by the network device includes:

[0059] The terminal device receives the first information sent by the network device through broadcast signaling, or the remaining minimum system information (RMSI), or system information.

[0060] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the terminal device receiving the first information sent by the network device includes:

[0061] The terminal device receives the first information sent by the network device through high-layer signaling.

[0062] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information instructs the terminal device to perform uplink transmission using the first uplink carrier;

[0063] The method further includes:

[0064] The terminal device receives second information sent by the network device, where the second information is used to activate or configure the first uplink carrier for the terminal device;

[0065] The terminal device activates or configures the first uplink carrier.

[0066] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in downlink control information (DCI).

[0067] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the method further includes:

[0068] The terminal device receives third information sent by the network device, where the third information instructs the terminal device to perform uplink transmission using the second uplink carrier, and the second uplink carrier is a link carrier among the multiple uplink carriers that is not the first uplink carrier;

[0069] According to the third information, the network device performs uplink transmission using the second uplink carrier;

[0070] Wherein, the transmission of the first information and the transmission of the third information are respectively in different scheduling processes of scheduling the terminal device after the first uplink carrier is activated or configured.

[0071] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information instructs the terminal device to perform uplink transmission using the first uplink carrier;

[0072] The method further includes:

[0073] The terminal device receives fourth information sent by the network device, where the fourth information indicates that the terminal device uses the third uplink carrier for uplink transmission, and the third uplink carrier is a link carrier among the multiple uplink carriers that is not the first uplink carrier;

[0074] The terminal device stops using the first uplink carrier and uses the third uplink carrier for uplink transmission.

[0075] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the uplink transmission is PUCCH transmission or PUSCH transmission.

[0076] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in information related to the sounding reference signal SRS;

[0077] The first information indicates that the terminal device uses the first uplink carrier for SRS transmission.

[0078] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in SRS configuration information for semi-statically configuring SRS; or

[0079] The first information is carried in a trigger message for dynamically triggering SRS.

[0080] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in configuration information for the random access procedure;

[0081] The first information indicates that the terminal device uses or is capable of using the first uplink carrier for the random access procedure.

[0082] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the configuration information indicates the frequency-domain position of the random access resource relative to the reference carrier position.

[0083] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the reference carrier position is the carrier position of the first uplink carrier; or,

[0084] The reference carrier position is the carrier position of another uplink carrier among the multiple uplink carriers that is not the first uplink carrier; or

[0085] The reference carrier position is the carrier position of the downlink carrier of the terminal device.

[0086] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the configuration signaling to which the configuration information belongs is further used to indicate: random access resources and / or random access codes for performing a random access procedure on at least one second uplink carrier.

[0087] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the method further includes:

[0088] The terminal device receives indication information sent by the network device, and the indication information indicates parameters for selecting an uplink carrier during random access.

[0089] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the parameter is used for the terminal device to determine a DL signal threshold corresponding to the uplink carrier, wherein, according to the relationship between the DL signal measurement result and the DL signal threshold, the corresponding uplink carrier is selected for the random access procedure.

[0090] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the indication information is carried in the configuration signaling to which the configuration information belongs; or,

[0091] The indication information is sent through broadcast signaling, or RMSI, or system information.

[0092] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the random access procedure is a contention-free random access procedure.

[0093] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in a command for timing adjustment, or carried in the transmission of a command for timing adjustment, and the first information is used to indicate timing adjustment for the first uplink carrier.

[0094] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in a field included in a command for timing adjustment; or,

[0095] The first information is indicated by processing information of a physical layer channel for carrying the command for timing adjustment.

[0096] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the first information is carried in the power adjustment information of the terminal device or carried in the transmission for the power adjustment information, and the first information is used to indicate power adjustment for the first uplink carrier.

[0097] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the multiple uplink carriers available for the terminal device are respectively in multiple different frequency bands.

[0098] Combined with the third aspect or any of the above possible implementation manners, in another possible implementation manner of the third aspect, the frequency band where the first uplink carrier is located is lower than the frequency bands of other uplink carriers.

[0099] In a fourth aspect, a wireless communication method is provided, including:

[0100] The terminal device determines a power headroom report based on multiple uplink carriers available for the terminal device;

[0101] The terminal device sends the power headroom report to the network device.

[0102] Combined with the fourth aspect, in a possible implementation manner of the fourth aspect, the power headroom report includes power headroom reports independently determined by the terminal device for each of the multiple uplink carriers.

[0103] Combined with the fourth aspect or any of the above possible implementation manners, in another possible implementation manner of the fourth aspect, the power headroom report includes a power headroom report obtained by the terminal device taking the multiple uplink carriers as a whole.

[0104] Combined with the fourth aspect or any of the above possible implementation manners, in another possible implementation manner of the fourth aspect, the multiple uplink carriers available for the terminal device are respectively in multiple different frequency bands.

[0105] In a fifth aspect, a network device is provided for performing the method in the first aspect or any possible implementation manner of the first aspect or the second aspect or any possible implementation manner of the second aspect. Specifically, the network device includes functional modules for performing the method in the first aspect or any possible implementation manner of the first aspect or the second aspect or any possible implementation manner of the second aspect.

[0106] In a sixth aspect, a terminal device is provided for performing the method in the above-mentioned third aspect or any possible implementation manner of the third aspect or the fourth aspect or any possible implementation manner of the fourth aspect. Specifically, the terminal device includes functional modules for performing the method in the above-mentioned third aspect or any possible implementation manner of the third aspect or the fourth aspect or any possible implementation manner of the fourth aspect.

[0107] In a seventh aspect, a network device is provided, including a processor, a memory, and a transceiver. The processor, the memory, and the transceiver communicate with each other through an internal connection path to transmit control and / or data signals, enabling the network device to perform the method in the above-mentioned first aspect or any possible implementation manner of the first aspect or the second aspect or any possible implementation manner of the second aspect.

[0108] In an eighth aspect, a terminal device is provided, including a processor, a memory, and a transceiver. The processor, the memory, and the transceiver communicate with each other through an internal connection path to transmit control and / or data signals, enabling the network device to perform the method in the above-mentioned third aspect or any possible implementation manner of the third aspect or the fourth aspect or any possible implementation manner of the fourth aspect.

[0109] In a ninth aspect, a computer-readable medium is provided for storing a computer program, where the computer program includes instructions for performing any of the above methods or any possible implementation manner.

[0110] In a tenth aspect, a computer program product including instructions is provided, which, when running on a computer, enables the computer to perform any of the above methods or the method in any possible implementation manner. Description of the Drawings

[0111] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0112] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.

[0113] Figure 2 is a schematic diagram of an uplink carrier in terms of resource partitioning according to an embodiment of the present application.

[0114] Figure 3 is a schematic diagram of an uplink carrier in terms of resource partitioning according to an embodiment of the present application.

[0115] Figure 4 It is a schematic diagram of the uplink carrier in terms of resource partitioning according to an embodiment of the present application.

[0116] Figure 5 It is a schematic diagram of the uplink carrier in terms of resource partitioning according to an embodiment of the present application.

[0117] Figure 6 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0118] Figure 7 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0119] Figure 8 It is a schematic block diagram of a network device according to an embodiment of the present application.

[0120] Figure 9 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0121] Figure 10 It is a schematic block diagram of a system chip according to an embodiment of the present application.

[0122] Figure 11 It is a schematic block diagram of a communication device according to an embodiment of the present application. Detailed implementation manners

[0123] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0124] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (abbreviated as "GSM") system, Code Division Multiple Access (abbreviated as "CDMA") system, Wideband Code Division Multiple Access (abbreviated as "WCDMA") system, General Packet Radio Service (abbreviated as "GPRS"), Long Term Evolution (abbreviated as "LTE") system, LTE Frequency Division Duplex (abbreviated as "FDD") system, LTE Time Division Duplex (abbreviated as "TDD"), Universal Mobile Telecommunication System (abbreviated as "UMTS"), Worldwide Interoperability for Microwave Access (abbreviated as "WiMAX") communication system or future 5G system (which can also be called New Radio (NR) system, etc.).

[0125] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term " / and" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0126] Figure 1 Fig. 1 shows a wireless communication system 100 to which the embodiments of the present application are applied.

[0127] It should be understood that Figure 1 Exemplarily, a network device and two terminal devices are shown. Optionally, the wireless communication system 100 may include multiple network devices, and the coverage range of each network device may include other numbers of terminal devices. The embodiments of the present application do not limit this.

[0128] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity. The embodiments of the present application do not limit this.

[0129] As Figure 1As shown, the wireless communication system 100 may include a network device 110. The network device 100 may be a device that communicates with terminal devices. The network device 100 may provide communication coverage for a specific geographical area and may communicate with terminal devices (such as UEs) located within that coverage area. Optionally, the network device 100 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, may also be a NodeB (NB) in a WCDMA system, may also be an Evolutional Node B (eNB or eNodeB) in an LTE system, or may be a radio controller in a Cloud Radio Access Network (CRAN), or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a future 5G network, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0130] The wireless communication system 100 further includes at least one terminal device 120 located within the coverage range of the network device 110. The terminal device 120 may be mobile or fixed. Optionally, the terminal device 120 may refer to an access terminal, a User Equipment (UE), a user unit, a user station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device, or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved PLMN, etc.

[0131] Optionally, direct device-to-device (D2D) communication may be performed between the terminal devices 120.

[0132] Optionally, the 5G system or network may also be referred to as a New Radio (NR) system or network.

[0133] The high-frequency band is an important alternative band for deploying 5G (NR) networks. Due to the relatively high frequency band, the coverage range is relatively limited (compared with low-frequency LTE). For the downlink (DL), due to the relatively large transmit power of the base station and large-scale multiple-input multiple-output (MIMO) (hybrid beamforming), etc., the DL coverage is improved. Due to the limited transmit power of the UE, the UL coverage will become a bottleneck.

[0134] Therefore, an uplink (UL) carrier can be deployed in the low frequency band for NR transmission. This UL carrier can be called a supplementary uplink (SUL) carrier. In this way, NR has at least two UL carriers, one is the SUL carrier, and the other is the high-frequency UL carrier (referred to as the dedicated UL of NR).

[0135] For example, as Figure 2 and Figure 3 shown, the NR system can include a high-frequency UL carrier in the frequency band f0 and a low-frequency UL carrier in the frequency band f1.

[0136] Among them, as Figure 2 shown, the high-frequency UL carrier in the frequency band f0 and the high-frequency DL carrier in the frequency band f0 are frequency-division duplexing (FDD), or, as Figure 3 shown, the high-frequency UL carrier in the frequency band f0 and the high-frequency DL carrier in the frequency band f1 are time-division duplexing (TDD).

[0137] Optionally, the SUL can also share spectrum resources with the LTE system, that is, in f1, only part of the resources can be used for NR, and other resources are used for LTE. The resource sharing can be in the form of frequency-division multiplexing (FDM) or time-division multiplexing (TDM) (for example, the TDM method as Figure 4 and 5 shown).

[0138] It should be understood that although the above example is described with two UL carriers existing in the NR system, the embodiments of the present application are not limited thereto. For example, the NR system can also have three or more UL carriers.

[0139] It should also be understood that in the embodiments of the present application, multiple UL carriers included in the NR system can all be used for the terminal device to perform uplink transmission. However, during configuration, the terminal device can be configured to use only some of the UL carriers for uplink transmission.

[0140] Optionally, the number of UL carriers configured by the network device for the terminal device to use and which specific UL carriers can change dynamically.

[0141] Therefore, the embodiments of the present application provide the following wireless communication method to solve how to perform wireless communication in a scenario where the network supports multiple UL carriers.

[0142] Figure 6 It is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. This method 200 can optionally be applied to Figure 1 the system shown, but is not limited thereto. This method 200 includes at least some of the following content.

[0143] In 210, the network device determines a first uplink carrier, and this first uplink carrier is an uplink carrier among multiple uplink carriers available for the terminal device.

[0144] Optionally, multiple uplink carriers available for the terminal device means that these multiple uplink carriers can be selected or configured for the terminal device's uplink transmission, but this does not mean that the terminal device must use multiple uplink carriers for uplink transmission.

[0145] Optionally, these multiple uplink carriers available for the terminal device are respectively in multiple different frequency bands.

[0146] Optionally, any two of these multiple uplink carriers can partially overlap or not overlap at all in the frequency domain.

[0147] Optionally, the frequency band where the first uplink carrier is located is lower than the frequency bands of other uplink carriers. For example, the first uplink carrier can be Figures 2 - 5 the SUL carrier shown.

[0148] The uplink carrier in the embodiment of the present application can also be referred to as an uplink carrier.

[0149] In 220, the network device sends first information to the terminal device, and this first information indicates that the terminal device uses or can use the first uplink carrier for uplink transmission, or processes the first uplink carrier.

[0150] Optionally, the first information indicating that the terminal device uses the first uplink carrier for uplink transmission may be that the terminal device directly uses the first uplink carrier in some uplink transmissions (Physical Uplink Shared Channel (PUSCH) or Sounding Reference Signal (SRS) transmission).

[0151] Optionally, the first information indicating that the terminal device is capable of using the first uplink carrier for uplink transmission means that the terminal device can choose to use the first uplink carrier in some uplink transmissions (e.g., random access procedure), and of course, it can also choose not to use the first uplink carrier.

[0152] Optionally, the first information indicating that the terminal device processes the first uplink carrier may include, for example, performing timing adjustment or transmit power adjustment on the first uplink carrier.

[0153] Optionally, the network device sends the first information to multiple terminal devices through broadcast signaling, or Remaining Minimum System Information (RMSI), or system information.

[0154] Optionally, the network device sends the first information to a single terminal device through higher layer signaling.

[0155] For example, the first information can be sent to a single terminal device through a Radio Resource Control (RRC) command or a Media Access Control (MAC) control element (CE).

[0156] In 230, the terminal device receives the first information sent by the network device.

[0157] In 240, based on the first information, the terminal device uses or selects to use the first uplink carrier for uplink transmission, or processes the first uplink carrier.

[0158] Specifically, when the first information indicates that the terminal device uses the first uplink carrier for uplink transmission, the terminal device uses the first uplink carrier for uplink transmission. When the first information indicates that the terminal device is capable of using the first uplink carrier for uplink transmission, the terminal device can choose to use or not use the first uplink carrier for uplink transmission. When the first information indicates that the terminal device processes the first uplink carrier, the terminal device processes the first uplink carrier.

[0159] Therefore, in the embodiments of the present application, there are multiple uplink carriers available for the uplink transmission of the terminal device, and the network device can indicate the use or processing of the uplink carriers among the multiple uplink carriers, so as to increase the flexibility of the uplink transmission of the terminal device and improve the communication performance.

[0160] Optionally, the first information indicates that the terminal device uses the first uplink carrier for uplink transmission; before the network device sends the first information to the terminal device, the network device sends second information to the terminal device, and the second information is used to activate or configure the first uplink carrier for the terminal device. The first information is optionally carried in the Downlink Control Information (DCI).

[0161] Optionally, after the network device activates or configures the first uplink carrier for the terminal device, the network device determines a second uplink carrier from the multiple uplink carriers available for the terminal device; the network device sends third information to the terminal device, and the third information indicates that the terminal device uses the second uplink carrier for uplink transmission; wherein, the sending of the first information and the sending of the third information are respectively in different scheduling processes of scheduling the terminal device after the activation or configuration of the first uplink carrier. The third information is optionally carried in the DCI. The uplink transmission is optionally PUSCH, or the uplink transmission is optionally PUCCH.

[0162] That is to say, the network device can first activate or configure the first uplink carrier, and after the activation or configuration, the first uplink carrier can be dynamically scheduled, and the terminal device does not need to always use the first uplink carrier for communication. For example, for the terminal device, the network device can also select a second uplink carrier and schedule the second uplink carrier.

[0163] Optionally, the first information indicates that the terminal device uses the first uplink carrier for uplink transmission; the network device determines a third uplink carrier, and the third uplink carrier is a link carrier among the multiple uplink carriers that is not the first uplink carrier; the network device sends fourth information to the terminal device, and the fourth information indicates that the terminal device uses the third uplink carrier for uplink transmission, so as to enable the terminal device to stop using the first uplink carrier and use the third uplink carrier for uplink transmission. The first information and the fourth information are optionally information for semi-static scheduling. The uplink transmission is optionally PUSCH, or the uplink transmission is optionally PUCCH.

[0164] Specifically, the network device may instruct the terminal device to perform uplink transmission using a certain uplink carrier (which may be a specific uplink transmission, such as PUSCH). After receiving this instruction, the terminal device will always perform uplink transmission using this uplink carrier (which may be a specific uplink transmission, such as PUSCH) until it receives an instruction message from the network device to change the uplink carrier.

[0165] Optionally, this first information is carried in the information related to the sounding reference signal SRS; this first information instructs the terminal device to use this first uplink carrier for SRS transmission. Thus, the intermediate device can, according to this first indication, use this first uplink carrier for SRS transmission.

[0166] In one implementation, this first information is carried in the SRS configuration information for semi-statically configuring SRS.

[0167] In another implementation, this first information is carried in the trigger message for dynamically triggering SRS.

[0168] Optionally, this first information is carried in the configuration information for the random access process; this first information instructs the terminal device to use or be able to use this first uplink carrier for the random access process. Thus, the terminal device can perform the random access process on the first uplink carrier, or choose to perform or not perform the random access process on the first uplink carrier.

[0169] Among them, the indication for the random access process for this random access resource is the frequency domain position relative to the reference carrier position.

[0170] Optionally, the reference carrier position is the carrier position of this first uplink carrier; or,

[0171] the reference carrier position is the carrier position of other uplink carriers among the multiple uplink carriers that are not this first uplink carrier; or

[0172] the reference carrier position is the carrier position of the downlink carrier of this terminal device.

[0173] Optionally, the configuration signaling to which this configuration information belongs is further used to indicate: the random access resources and / or random access codes for performing the random access process on at least one second uplink carrier. The random access resources and / or random access codes for performing the random access process on the first uplink carrier and the random access resources and / or random access codes for performing the random access process on the second uplink carrier may be the same. The random access code in the embodiments of this application may be referred to as a random access preamble (Preamble).

[0174] That is to say, the network device may send random access resources and / or access codes for multiple uplink configuration random access procedures, so that the network device may select an uplink carrier for random access and perform random access by using the random access resources and / or access codes corresponding to the selected uplink carrier.

[0175] Optionally, the terminal device may select an uplink carrier for random access according to specific parameters.

[0176] For example, the specific parameter may be used by the terminal device to obtain the DL signal threshold corresponding to the uplink carrier, so that the terminal device selects a corresponding uplink carrier for the random access procedure according to the relationship between the downlink carrier (DL) signal measurement result and the DL signal threshold.

[0177] For example, the value corresponding to the DL signal threshold includes a. When the value of the DL signal is greater than or equal to a, the first uplink carrier is selected for random access. When the value of the DL signal is less than a, the second uplink carrier is selected for random access.

[0178] Optionally, the parameter used to select the uplink carrier during random access may be sent by the network device to the terminal device through indication information. Among them, the parameter may directly indicate the above-mentioned DL signal threshold, or may also give a parameter for indirectly obtaining the DL signal threshold.

[0179] Among them, the indication information is carried in the configuration signaling to which the above-mentioned configuration information belongs; or, the indication information is sent independently of the above-mentioned configuration information through broadcast signaling, or RMSI, or system information.

[0180] Optionally, the parameter used to select the uplink carrier during random access may be preset on the terminal device.

[0181] Optionally, the random access procedure mentioned in the embodiments of this application is a contention-free random access procedure.

[0182] Optionally, the first information is carried in a Timing Advance Command for timing adjustment, or carried in the transmission of the Timing Advance Command for timing adjustment, and the first information is used to indicate timing adjustment for the first uplink carrier.

[0183] Specifically, when the network device sends a Timing Advance Command for timing adjustment, it may carry information about the uplink carrier that needs to be timed adjusted.

[0184] In one implementation, the first information is carried in a field included in the Timing Advance Command for timing adjustment; or,

[0185] In one implementation, the first information is indicated by processing information of a physical layer channel for carrying a command for timing adjustment. For example, it is indicated by a scrambling code used for physical layer transmission.

[0186] Optionally, the first information is carried in the power adjustment information of the terminal device, or carried in the transmission for power adjustment information, and the first information is used to indicate power adjustment for the first uplink carrier.

[0187] Specifically, when the network device sends power adjustment information, it may carry information about the uplink carrier for which the terminal device needs to perform power adjustment.

[0188] Figure 7 It is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. The method 300 includes at least some of the following content.

[0189] In 310, the terminal device determines a power headroom report based on multiple uplink carriers available to the terminal device.

[0190] Optionally, the multiple uplink carriers available to the terminal device means that the multiple uplink carriers can be selected or configured for the uplink transmission of the terminal device, but this does not mean that the terminal device must use multiple uplink carriers for uplink transmission.

[0191] Optionally, the multiple uplink carriers available to the terminal device are respectively in multiple different frequency bands.

[0192] Optionally, any two uplink carriers among the multiple uplink carriers may partially overlap or completely non - overlap in the frequency domain.

[0193] The uplink carrier in the embodiment of the present application may also be referred to as an uplink carrier.

[0194] In 320, the terminal device sends the power headroom report (Power Headroom Report, PHR) to the network device.

[0195] Optionally, the power headroom report includes power headroom reports independently reported by the terminal device for each uplink carrier among the multiple uplink carriers.

[0196] At this time, the terminal device may report the power headroom report of each uplink carrier through each uplink carrier.

[0197] At this time, the terminal device may report the power headroom report of each uplink carrier through each uplink carrier, or may report the power headroom report of other uplink carriers through a certain uplink carrier.

[0198] Optionally, the power headroom report includes a power headroom report that the terminal device reports the multiple uplink carriers as a whole.

[0199] At this time, the terminal device may report the power headroom report through each uplink carrier respectively, or may also report the power headroom report through some of the uplink carriers.

[0200] In 330, the network device receives the power headroom report reported by the terminal device. Thus, the network device can process the power headroom report.

[0201] For example, determine the uplink carriers that the terminal device uses or can use, or adjust the transmit power of at least one uplink carrier.

[0202] Therefore, in the embodiment of the present application, the terminal device determines a power headroom report based on multiple uplink carriers available to the terminal device, and sends the power headroom report to the network device. Thus, the network device can use the power headroom report to schedule the multiple uplink carriers available to the terminal device for the terminal device.

[0203] Figure 8 It is a schematic block diagram of a network device 400 according to an embodiment of the present application. As Figure 8 shown, the network device 400 includes a processing unit 410 and a communication unit 420.

[0204] Optionally, the processing unit 410 is configured to: determine a first uplink carrier, where the first uplink carrier is an uplink carrier among multiple uplink carriers available to the terminal device; the communication unit 420 is configured to: send first information to the terminal device, where the first information instructs the terminal device to use or be able to use the first uplink carrier for uplink transmission, or process the first uplink carrier.

[0205] Optionally, the communication unit 420 is configured to: receive a power headroom report reported by the terminal device for multiple uplink carriers available to the terminal device; the processing unit 410 is configured to: process the power headroom report.

[0206] It should be understood that the network device 400 may perform the corresponding operations performed by the network device in the above method embodiments. For the sake of brevity, it will not be repeated here.

[0207] Figure 9 It is a schematic block diagram of a terminal device 500 according to an embodiment of the present application. The terminal device 500 includes a communication unit 510 and a processing unit 520.

[0208] Optionally, the communication unit 510 is configured to: receive first information sent by a network device, where the first information indicates that the terminal device adopts or is capable of adopting a first uplink carrier for uplink transmission, or processes the first uplink carrier, and the first uplink carrier is an uplink carrier among multiple uplink carriers available for the terminal device; the processing unit 520 is configured to: according to the first information, adopt or select to adopt the first uplink carrier for uplink transmission, or process the first uplink carrier.

[0209] Optionally, the processing unit 520 is configured to: determine a power headroom report based on multiple uplink carriers available for the terminal device; the communication unit 510 is configured to: send the power headroom report to the network device.

[0210] It should be understood that the terminal device 500 can perform the corresponding operations of the terminal device in the above method embodiments. For the sake of brevity, details are not described herein again.

[0211] Figure 10 is a schematic structural diagram of a system-on-chip 600 according to an embodiment of the present application. Figure 10 In the system-on-chip 600, an input interface 601, an output interface 602, the processor 603, and the memory 604 can be connected through an internal communication connection line, and the processor 603 is configured to execute the code in the memory 604.

[0212] Optionally, when the code is executed, the processor 603 implements the method performed by the network device in the method embodiments. For the sake of brevity, details are not described herein again.

[0213] Optionally, when the code is executed, the processor 603 implements the method performed by the terminal device in the method embodiments. For the sake of brevity, details are not described herein again.

[0214] Figure 11 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. As Figure 11 shown, the communication device 700 includes a processor 710 and a memory 720. Among them, the memory 720 can store program code, and the processor 710 can execute the program code stored in the memory 720.

[0215] Optionally, as Figure 11 shown, the communication device 700 may include a transceiver 730, and the processor 710 can control the transceiver 730 to communicate externally.

[0216] Optionally, the processor 710 may call the program code stored in the memory 720 to perform the corresponding operations of the network device in the method embodiments. For the sake of brevity, details are not described herein again.

[0217] Optionally, the processor 710 may call the program code stored in the memory 720 to perform the corresponding operations of the terminal device in the method embodiments. For the sake of brevity, details are not described herein again.

[0218] It should be understood that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method embodiments may be completed by the integrated logic circuit in the hardware of the processor or by instructions in the form of software. The above processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by the hardware decoding processor, or by a combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0219] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink dynamic random access memory (SLDRAM), and direct rambus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include but not be limited to these and any other suitable types of memory.

[0220] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present application.

[0221] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be described herein again.

[0222] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0223] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0224] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0225] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present application, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0226] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that, including: A network device determines a supplementary uplink (SUL) carrier, where the SUL carrier is an uplink carrier among multiple uplink carriers that are available for a terminal device and are respectively in multiple different frequency bands, and the frequency band where the SUL carrier is located is lower than the frequency bands of other uplink carriers; The network device sends first information to the terminal device, and the first information instructs the terminal device to use the SUL carrier to transmit a sounding reference signal (SRS); wherein, the first information is carried in SRS configuration information for semi-statically configuring the SRS; or the first information is carried in a trigger message for dynamically triggering the SRS; The method further includes: Before sending the first information, the network device sends second information to the terminal device, and the second information is used to configure the SUL carrier for the terminal device.

2. The method according to claim 1, characterized in that, The network device sending the first information to the terminal device includes: The network device sends the first information to multiple terminal devices through broadcast signaling, or remaining minimum system information (RMSI), or system information.

3. The method according to claim 1, characterized in that, The network device sending the first information to the terminal device includes: The network device sends the first information to a single terminal device through high-layer signaling.

4. The method according to claim 1, characterized in that, The method further includes: The network device determines a second uplink carrier from multiple uplink carriers available for the terminal device; The network device sends third information to the terminal device, and the third information instructs the terminal device to perform uplink transmission using the second uplink carrier; wherein, the sending of the first information and the sending of the third information are respectively in different scheduling processes for scheduling the terminal device after the SUL carrier is configured.

5. The method according to any one of claims 1 to 3, characterized in that, The method further includes: The network device determines a third uplink carrier, and the third uplink carrier is a link carrier among the multiple uplink carriers that is not the SUL carrier; The network device sends fourth information to the terminal device, and the fourth information instructs the terminal device to perform uplink transmission using the third uplink carrier, so that the terminal device stops using the SUL carrier and uses the third uplink carrier for uplink transmission.

6. A wireless communication method, characterized in that, including: A terminal device receives first information sent by a network device, where the first information instructs the terminal device to use a supplementary uplink (SUL) carrier to transmit a sounding reference signal (SRS), and the SUL carrier is an uplink carrier among multiple uplink carriers available for the terminal device; According to the first information, the SRS signal is transmitted using the SUL carrier; wherein, the multiple uplink carriers available for the terminal device are respectively in multiple different frequency bands, and the frequency band where the SUL carrier is located is lower than the frequency bands of other uplink carriers; the first information is carried in SRS configuration information for semi-statically configuring the SRS; or the first information is carried in a trigger message for dynamically triggering the SRS; The method further includes: The terminal device receives second information sent by the network device before sending the first information, where the second information is used to configure the SUL carrier for the terminal device; The terminal device configures the SUL carrier.

7. The method according to claim 6, characterized in that, The terminal device receives first information sent by the network device, including: The terminal device receives the first information sent by the network device through broadcast signaling, or remaining minimum system information (RMSI), or system information.

8. The method according to claim 6, characterized in that, The terminal device receives first information sent by the network device, including: The terminal device receives the first information sent by the network device through high-layer signaling.

9. The method according to claim 6, characterized in that,The method further includes: The terminal device receives third information sent by the network device, where the third information indicates that the terminal device uses a second uplink carrier for uplink transmission, and the second uplink carrier is a link carrier among the multiple uplink carriers that is not the SUL carrier; According to the third information, the network device uses the second uplink carrier for uplink transmission; Wherein, the transmission of the first information and the transmission of the third information are respectively in different scheduling processes for scheduling the terminal device after the SUL carrier is configured.

10. The method according to any one of claims 6 to 8, characterized in that, The method further includes: The terminal device receives fourth information sent by the network device, where the fourth information indicates that the terminal device uses a third uplink carrier for uplink transmission, and the third uplink carrier is a link carrier among the multiple uplink carriers that is not the SUL carrier; The terminal device stops using the SUL carrier and uses the third uplink carrier for uplink transmission.

11. A network device, characterized in that, It includes a processing unit and a communication unit; wherein, The processing unit is used to: determine a supplementary uplink (SUL) carrier, where the SUL carrier is an uplink carrier among multiple uplink carriers that are available for the terminal device and are respectively in multiple different frequency bands, and the frequency band where the SUL carrier is located is lower than the frequency bands of other uplink carriers; The communication unit is used to: send first information to the terminal device, where the first information indicates that the terminal device uses the SUL carrier to transmit a sounding reference signal (SRS), Wherein, The first information is carried in SRS configuration information for semi-statically configuring the SRS; or the first information is carried in a trigger message for dynamically triggering the SRS; The communication unit is further used to: Before sending the first information, send second information to the terminal device, where the second information is used to configure the SUL carrier for the terminal device.

12. The network device according to claim 11, characterized in that, The communication unit is further used to: Send the first information to multiple terminal devices through broadcast signaling, or remaining minimum system information (RMSI), or system information.

13. The network device according to claim 11, characterized in that, The communication unit is further used to: Send the first information to a single terminal device through high-layer signaling.

14. The network device according to claim 11, characterized in that, The processing unit is further used to: determine a second uplink carrier from multiple uplink carriers available for the terminal device; The communication unit is further configured to: send third information to the terminal device, where the third information indicates that the terminal device performs uplink transmission using the second uplink carrier; wherein, The sending of the first information and the sending of the third information are respectively in different scheduling processes for scheduling the terminal device after the SUL carrier configuration.

15. The network device according to any one of claims 11 to 13, characterized in that, The processing unit is further configured to: determine a third uplink carrier, where the third uplink carrier is a link carrier among the multiple uplink carriers that is not the SUL carrier; The communication unit is further configured to: send fourth information to the terminal device, where the fourth information indicates that the terminal device performs uplink transmission using the third uplink carrier, so that the terminal device stops using the SUL carrier and uses the third uplink carrier for uplink transmission.

16. A terminal device, characterized in that, It includes a communication unit and a processing unit; The communication unit is configured to: receive first information sent by a network device, where the first information indicates that the terminal device uses a supplementary uplink (SUL) carrier to transmit a sounding reference signal (SRS), and the SUL carrier is an uplink carrier among multiple uplink carriers available for the terminal device; The processing unit is configured to: transmit the SRS signal using the SUL carrier according to the first information, wherein, The multiple uplink carriers available for the terminal device are respectively in multiple different frequency bands, and the frequency band where the SUL carrier is located is lower than the frequency bands of other uplink carriers; The first information is carried in SRS configuration information for semi-statically configuring the SRS; or the first information is carried in a trigger message for dynamically triggering the SRS; The communication unit is further configured to: receive second information sent by the network device before sending the first information, where the second information is used to configure the SUL carrier for the terminal device; The processing unit is further configured to: configure the SUL carrier.

17. The terminal device according to claim 16, characterized in that,The communication unit is further configured to: receive the first information sent by the network device through broadcast signaling, or remaining minimum system information (RMSI), or system information.

18. The terminal device according to claim 16, wherein The communication unit is further configured to: receive the first information sent by the network device through high-layer signaling.

19. The terminal device according to claim 16, wherein The terminal device further includes: The communication unit is further configured to: receive third information sent by the network device, where the third information indicates that the terminal device performs uplink transmission using a second uplink carrier, and the second uplink carrier is a link carrier among the multiple uplink carriers that is not the SUL carrier; The processing unit is further configured to: perform uplink transmission using the second uplink carrier according to the third information; wherein, the transmission of the first information and the transmission of the third information are respectively in different scheduling processes for scheduling the terminal device after the SUL carrier configuration.

20. The terminal device according to any one of claims 16 to 18, wherein The communication unit is further configured to: receive fourth information sent by the network device, where the fourth information indicates that the terminal device performs uplink transmission using a third uplink carrier, and the third uplink carrier is a link carrier among the multiple uplink carriers that is not the SUL carrier; The processing unit is further configured to: stop using the SUL carrier and perform uplink transmission using the third uplink carrier.

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