Method, terminal device and network device for wireless communication

Abstract

Provided is a method for wireless communication, comprising: a terminal device receiving first information transmitted by a network device, the first information being associated with a first bandwidth in a first cell, wherein the first cell comprises a plurality of different bandwidths. In the embodiments of the present application, the introduction of a cell that can comprise a plurality of different bandwidths helps to reduce the number of cells in the communication system, thereby reducing the number of independent resources configured for different cells, as compared with a traditional cell that can only contain continuous frequency domain resources within the band.

Description

Wireless communication method, terminal device and network device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0002] At present, relatively independent resources are usually configured for different cells. For example, reference signals (such as synchronization signals and physical broadcast channel blocks (SSB)) need to be independently defined for different cells. For another example, different cells will occupy different hybrid automatic repeat request (HARQ) buffers. For another example, different cells require independent control channel resources. With the widespread application of communication systems, the number of cells is increasing, and accordingly, the number of independent resources configured for different cells is increasing, which may lead to higher complexity of communication equipment in the communication system.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, terminal device, and network device. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for wireless communication is provided, comprising: a terminal device receiving first information sent by a network device, where the first information is associated with a first bandwidth in a first cell, wherein the first cell includes multiple different bandwidths.

[0006] In a second aspect, a method for wireless communication is provided, comprising: a network device sending first information to a terminal device, where the first information is associated with a first bandwidth in a first cell, wherein the first cell includes multiple different bandwidths.

[0007] According to a third aspect, a terminal device is provided, comprising: a receiving unit for receiving first information sent by a network device, wherein the first information is associated with a first bandwidth in a first cell, wherein the first cell includes multiple different bandwidths.

[0008] In a fourth aspect, a network device is provided, comprising: a sending unit, configured to send first information to a terminal device, wherein the first information is associated with a first bandwidth in a first cell, wherein the first cell includes multiple different bandwidths.

[0009] In a fifth aspect, a terminal device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device (for example, a terminal device or a network device) to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device (e.g., a terminal device or a network device) to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product can be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] In an embodiment of the present application, the introduction of cells that can include multiple different bandwidths helps to reduce the number of cells in the communication system compared to traditional cells that can only contain continuous frequency domain resources within the band, thereby reducing the number of independent resources configured for different cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a wireless communication system 100 used in an embodiment of the present application.

[0017] FIG2 is a schematic diagram of a dual-connection architecture applicable to an embodiment of the present application.

[0018] FIG3 is a schematic diagram of a conventional bandwidth part (BWP).

[0019] FIG4 is a schematic diagram of the first bandwidth and the second bandwidth in an embodiment of the present application.

[0020] FIG5 is a schematic diagram of a first bandwidth and a second bandwidth in another embodiment of the present application.

[0021] FIG6 is a schematic diagram of a first bandwidth and a second bandwidth in another embodiment of the present application.

[0022] FIG7 is a schematic diagram of a first bandwidth and a second bandwidth in another embodiment of the present application.

[0023] FIG8 is a schematic diagram of a first bandwidth and a second bandwidth in another embodiment of the present application.

[0024] FIG9 is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0025] FIG10 is a schematic flowchart of a wireless communication method according to another embodiment of the present application.

[0026] FIG11 is a schematic flowchart of a wireless communication method according to another embodiment of the present application.

[0027] FIG12 is a schematic diagram of a terminal device according to an embodiment of the present application.

[0028] FIG13 is a schematic diagram of a network device according to an embodiment of the present application.

[0029] FIG14 is a schematic structural diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solution in this application will be described below with reference to the accompanying drawings.

[0031] Figure 1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0032] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0033] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0034] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0035] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0036] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0037] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0038] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0039] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0040] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0041] Protocol stack architecture

[0042] In some communication systems (e.g., 5G), in the case of a dual-connectivity architecture, the protocol stacks of the user plane and the control plane are relatively complex, which will be introduced below in conjunction with Figure 2.

[0043] As shown in Figure 2, under the dual-connection architecture, the network node is composed of two nodes, namely the master node (MN) and the secondary node (SN). The packet data convergence protocol (PDCP) and service data adaptation protocol (SDAP) protocol stacks and the corresponding protocol stacks below PDCP (for example, radio link control protocol (RLC), media access control (MAC) and physical layer (PHY layer)) may be located in different network nodes. There is no problem of distinguishing different nodes within the terminal device, but there is a problem of the role of the cell group, that is, the terminal device needs to distinguish between the master cell group (MCG) and the secondary cell group (SCG). The difference between MCG and SCG comes from the difference in the protocol layers (i.e., MAC and PHY) of different radio bearer aggregation.

[0044] Continuing with Figure 2, for LTE and 5G dual connectivity (EUTRA-NR Dual Connection, EN-DC), from the network side, when the RLC, MAC, and PHY protocol stacks of a radio bearer are located in the MN, such a radio bearer is called an MCG bearer, otherwise it is called an SCG bearer. In addition, a split bearer has radio links on both the MN and the SN, but only one PDCP protocol stack. This PDCP protocol stack may be on the MN or the SN. The purpose of split bearers is to increase the throughput of the radio interface.

[0045] Carrier Aggregation

[0046] Each cell group can support one or more cells to support carrier aggregation. In carrier aggregation (CA), two or more component carriers (CCs) are aggregated. Terminal devices can simultaneously receive or transmit on one or more CCs based on their capabilities.

[0047] In some implementations, a terminal device with CA single timing advance (TA) capability may receive and / or transmit simultaneously on multiple CCs. Typically, these CCs correspond to multiple serving cells that share the same timing advance, for example, multiple serving cells are grouped into a timing advance group (TAG).

[0048] In other implementations, a terminal device with CA multi-timing advance capability may simultaneously receive and / or send different timing advances on multiple CCs corresponding to multiple serving cells, where the multiple serving cells are grouped in multiple TAGs.

[0049] Typically, a terminal device is configured with a maximum number of CCs: 16 CCs for downlink transmission and 16 CCs for uplink transmission.

[0050] Residential area and BWP

[0051] Currently, the carrier bandwidth of NR systems is significantly larger than that of LTE systems. Furthermore, most core frequency bands can support a typical carrier bandwidth of 100 MHz. The advantage of large bandwidth is high transmission rates. However, if the service mode is small data transmission or the service is discontinuous, it is very uneconomical for the terminal device to operate in large bandwidth mode.

[0052] Therefore, to conserve power consumption in terminal devices, the BWP was introduced. BWP defines a bandwidth that is smaller than both the cell's carrier bandwidth and the terminal device's bandwidth capability. This allows the terminal device to operate within a smaller bandwidth under dynamic configuration by network equipment when the amount of data transmitted over the air interface is low. Consequently, the terminal device's RF front-end components, RF transceiver, and baseband signal processing module can operate within a smaller bandwidth and lower processing clock speed, thereby reducing power consumption.

[0053] On the other hand, all sending and receiving operations of the terminal device can be performed within the BWP, so that the terminal device can also achieve more flexible, more efficient and lower power consumption communication in a large bandwidth system.

[0054] For example, as shown in Figure 3, in a large-bandwidth system (e.g., 5G NR), the bandwidth capability of network equipment (or, in other words, the cell system bandwidth) has increased significantly, with its maximum carrier bandwidth reaching 400MHz. However, the bandwidth capability of terminal devices has not increased significantly as fast as that of the network side, and the maximum carrier bandwidth supported is 100MHz. After the introduction of BWP, terminal devices can communicate within the BWP, which helps the large-bandwidth system be compatible with terminal devices of various capabilities and makes terminal devices more flexible in communicating in the large-bandwidth system.

[0055] For another example, the business conditions of the terminal device are changing. In some time periods, the business volume of the terminal device may surge, and in other time periods, the business volume of the terminal device may decrease. In other words, the terminal device does not always need to operate at the maximum bandwidth capacity. At this time, the network device can adjust the BWP of the terminal device based on the business volume of the terminal device to save the power consumption of the terminal device while improving the utilization of frequency domain resources in the communication system.

[0056] Based on the previous introduction, it can be seen that in some communication systems (for example, NR systems), the concepts of cell group-cell and carrier-BWP are supported hierarchically, where a cell group can include one or more cells, and a carrier can include one or more BWPs.

[0057] In some scenarios, the network device needs to configure a serving cell for the terminal device so that the terminal device can communicate with the network device through the serving cell.

[0058] Currently, relatively independent resources are typically configured for different cells. For example, reference signals (e.g., SSBs) need to be independently defined for different cells. Another example is that different cells occupy different HARQ buffers. Another example is that different cells require independent control channel resources. With the widespread application of communication systems, the number of cells is increasing, and accordingly, the number of independent resources configured for different cells is increasing, which may lead to higher complexity of communication equipment in the communication system.

[0059] Therefore, to address the above issues, the applicant proposes to redefine the cell, that is, the cell (also called the first cell) can include multiple different bandwidths, which helps to reduce the number of cells in the communication system and thus reduce the number of independent resources configured for different cells.

[0060] In some implementations, the first cell may include multiple bandwidths, or in other words, the first cell includes multiple different bandwidths, wherein the multiple bandwidths include the first bandwidth.

[0061] In the embodiments of this application, the bandwidth described above is not limited. In some implementations, bandwidth can be understood as a frequency range. Accordingly, the first bandwidth can be replaced by the first frequency range, and multiple bandwidths can be replaced by multiple frequency ranges. The frequency range can be continuous in the frequency domain. For example, the frequency range can be a BWP. Accordingly, the first bandwidth can be the first BWP, and the multiple bandwidths can be multiple BWPs.

[0062] It should be understood that the names of the above-mentioned bandwidths are not limited in the embodiments of the present application. For example, the first bandwidth can be referred to as a first frequency band, and multiple bandwidths can be referred to as multiple frequency bands. For another example, the first bandwidth can be referred to as a first frequency domain range, and multiple bandwidths can be referred to as multiple frequency domain ranges.

[0063] In some implementations, at least two of the multiple bandwidths may satisfy one or more of the following conditions: at least two bandwidths are continuous in the frequency domain; at least two bandwidths are discontinuous in the frequency domain; at least two bandwidths are located in different frequency bands; or at least two bandwidths partially or completely overlap in the frequency domain. For ease of understanding, the following describes the at least two bandwidths in this embodiment using bandwidths 1 and 2 as examples.

[0064] Taking bandwidth 1 and bandwidth 2 as an example of being continuous in the frequency domain, in some implementations, as shown in FIG4 , if the frequency domain range of bandwidth 1 is higher than the frequency domain range of bandwidth 2, the frequency domain starting position of bandwidth 1 may be the same as the frequency domain ending position of bandwidth 2. Of course, in the embodiment of the present application, if the frequency domain range of bandwidth 1 is lower than the frequency domain range of bandwidth 2, the frequency domain ending position of bandwidth 1 may be the same as the frequency domain starting position of bandwidth 2.

[0065] Taking bandwidth 1 and bandwidth 2 as an example, which are located in different frequency bands, the first cell can include frequency domain resources across frequency bands. Compared to traditional cells that can only include continuous frequency domain resources within a band, this helps to divide frequency domain resources across frequency bands into one cell, thereby reducing the number of cells. For example, as shown in Figure 5, bandwidth 1 is located in frequency band 1, and bandwidth 2 is located in frequency band 2, where frequency band 1 and frequency band 2 are different frequency bands.

[0066] For example, bandwidth 1 and bandwidth 2 are discontinuous in the frequency domain, or in other words, bandwidth 1 and bandwidth 2 are spaced apart in the frequency domain. For example, as shown in Figure 6, if the frequency domain range of bandwidth 1 is higher than the frequency domain range of bandwidth 2, the frequency domain start position of bandwidth 1 and the frequency domain end position of bandwidth 2 are separated by one frequency domain interval. For another example, if the frequency domain range of bandwidth 1 is lower than the frequency domain range of bandwidth 2, the frequency domain end position of bandwidth 1 and the frequency domain start position of bandwidth 2 are separated by one frequency domain interval.

[0067] The cell defined in the embodiment of the present application may include bandwidth 1 and bandwidth 2 that are discontinuous in the frequency domain, or in other words, the defined cell may include frequency domain resources that are discontinuous in the frequency domain. Compared with traditional cells that can only contain continuous frequency domain resources, it helps to divide the frequency domain resources that are discontinuous in the frequency domain into one cell to reduce the number of cells.

[0068] Taking the partial or complete overlap of bandwidth 1 and bandwidth 2 in the frequency domain as an example, in some implementations, bandwidth 1 and bandwidth 2 completely overlap in the frequency domain. It can be understood that the frequency domain range of bandwidth 1 is the same as the frequency domain range of bandwidth 2.

[0069] In other implementations, bandwidth 1 and bandwidth 2 partially overlap in the frequency domain. Referring to FIG7 , the partial overlap can be understood as the frequency domain range of bandwidth 1 including the frequency domain range of bandwidth 2, that is, the frequency domain range of bandwidth 2 belongs to the frequency domain range of bandwidth 1. Of course, in the embodiment of the present application, the partial overlap can be understood as the frequency domain range of bandwidth 2 including the frequency domain range of bandwidth 1, that is, the frequency domain range of bandwidth 1 belongs to the frequency domain range of bandwidth 2.

[0070] Of course, in the embodiment of the present application, the above-mentioned partial overlap can be understood as the overlap between part of the frequency domain range of bandwidth 1 and part of the frequency domain range of bandwidth 2. For example, referring to FIG8 , the frequency domain starting position of bandwidth 1 is located within the frequency domain range of bandwidth 2, and the frequency domain starting position of bandwidth 1 does not overlap with the frequency domain starting position of bandwidth 2. Of course, in the embodiment of the present application, the frequency domain starting position of bandwidth 2 is located within the frequency domain range of bandwidth 1, and the frequency domain starting position of bandwidth 1 does not overlap with the frequency domain starting position of bandwidth 2.

[0071] In the embodiment of the present application, the frequency domain positions between bandwidth 1 and bandwidth 2 described above can be used alone or in combination with each other. For example, bandwidth 1 and bandwidth 2 are located in different frequency bands, and bandwidth 1 and bandwidth 2 are continuous in the frequency domain. For another example, bandwidth 1 and bandwidth 2 are located in different frequency bands, and bandwidth 1 and bandwidth 2 are discontinuous in the frequency domain. For another example, bandwidth 1 and bandwidth 2 are located in different frequency bands, and bandwidth 1 and bandwidth 2 partially or completely overlap in the frequency domain. For another example, bandwidth 1 and bandwidth 2 partially overlap in the frequency domain, and bandwidth 1 and bandwidth 2 are continuous in the frequency domain.

[0072] It should be noted that in the embodiments of the present application, the number of bandwidths included in the first cell is not limited. For example, the first cell may include the above-mentioned bandwidth 1 and bandwidth 2. For another example, the first cell may include multiple bandwidths, where bandwidth 1 and bandwidth 2 can be understood as two bandwidths among the multiple bandwidths.

[0073] Based on the above description of the relationship between bandwidth (including bandwidth 1 and / or bandwidth 2) and the first cell, it can be seen that the relationship between bandwidth and cell is similar to the relationship between cell and cell group in known communication systems. Specifically, the bandwidth of the embodiment of the present application is similar to the cell in known communication systems, and accordingly, the cell in the embodiment of the present application is similar to the cell group in known communication systems. In other words, in the example of the present application, one cell can be used to aggregate multiple traditional carriers, which helps to avoid the linear increase in the number of cells as the frequency domain resources are aggregated.

[0074] The first cell in the embodiment of the present application is introduced above, and the solution of the embodiment of the present application is introduced below from the perspective of the first information. Figure 9 is a schematic flow chart of the wireless communication method in the embodiment of the present application.

[0075] In step S910, the network device sends first information to the terminal device, where the first information is associated with a first bandwidth.

[0076] In some implementations, the first information is used for mobility management of the terminal device based on the first bandwidth, which is introduced below in conjunction with Examples 1 to 3 respectively.

[0077] Embodiment 1: The first information is used to instruct the terminal device to switch from the first bandwidth to the second bandwidth.

[0078] In an embodiment of the present application, the terminal device can be instructed to switch based on bandwidth granularity based on the first information, or in other words, the indication granularity of the first information is bandwidth, without the need to switch based on cell granularity as in traditional solutions.

[0079] In some implementations, the second bandwidth may be located in the same cell as the first bandwidth (e.g., the first cell described above). In this case, the frequency domain position between the second bandwidth and the first bandwidth may be any of the positions described above in conjunction with Figures 4 to 8. Of course, in the embodiments of the present application, the second bandwidth and the first bandwidth may belong to different cells. For example, the first bandwidth belongs to a second cell, and the second cell is different from the first cell.

[0080] In the embodiments of the present application, the second cell is not limited. For example, the second cell may be a new cell proposed in the embodiments of the present application. In this case, the definition of the second cell is similar to that of the first cell, and reference may be made to the above description. Of course, in the embodiments of the present application, the second cell may be a traditional cell.

[0081] In the embodiment of the present application, the first information is used to instruct the terminal device to switch from the first bandwidth to the second bandwidth. Therefore, the first bandwidth can also be called the "source bandwidth", and correspondingly, the second bandwidth can be called the "target bandwidth".

[0082] In some implementations, switching to the first bandwidth is triggered based on the mobility of the terminal device. For example, if the terminal device moves from a service area corresponding to the first bandwidth to a service area corresponding to the second bandwidth, the switching may be triggered. Of course, in embodiments of the present application, switching to the first bandwidth may also be triggered based on the service needs of the terminal device. For example, if the service volume associated with the terminal device increases and the second bandwidth is greater than the first bandwidth, the switching may be triggered.

[0083] In some implementations, the first information may be carried in physical layer signaling, which helps reduce the latency of bandwidth switching for the terminal device. Of course, in the embodiment of the present application, the first information may also be carried in a media access control element (MAC CE).

[0084] In some implementations, the first information includes one or more of the following: information for indicating whether to perform a MAC reset (MAC reset), wherein the MAC reset is used to clear the MAC layer cache associated with the first bandwidth; information for indicating whether to change the key; information for indicating whether to re-establish the radio link layer control (RLC) entity; information for indicating whether to reconfigure the packet data convergence protocol (PDCP); information for indicating whether to re-establish the packet data convergence protocol PDCP; and information for indicating whether to perform data recovery on the packet data convergence protocol PDCP.

[0085] In some other implementations, the first information may be used to indicate one or more of the following: resetting MAC; changing keys; reestablishing RLC entities; reconfiguring PDCP; reestablishing PDCP; and recovering data from PDCP.

[0086] It should be noted that the first information can indicate the execution of the above operation in an implicit manner. For example, if the terminal device receives the first information, the terminal device can determine to execute the above operation. At this time, the first information may not carry information indicating the execution of the above operation, which helps to reduce the overhead of transmitting the first information. On the contrary, if the terminal device does not receive the first information, the terminal device confirms not to execute the above operation. Of course, in an embodiment of the present application, the first information can indicate the execution of the above operation in a displayed manner. For example, if the terminal device receives the first information, the terminal device can determine to execute the above operation. At this time, how the above operation is specifically executed needs to be determined by one or more bits carried in the first information, and these bits are used to indicate the information for executing the above operation.

[0087] In an embodiment of the present application, the first information can be used to indicate whether the terminal device is to perform the above-mentioned operation while indicating whether the bandwidth is to be switched. This helps to reduce the delay required for the terminal device to perform the bandwidth switching. Of course, in an embodiment of the present application, the information indicating whether the terminal device is to perform the above-mentioned operation can be transmitted separately (for example, via third information transmission). That is to say, in some implementations, the above method further includes: the network device sends third information to the terminal device, wherein the third information is different from the first information.

[0088] In some implementations, the third information may be transmitted before the first information, which helps reduce the time delay required for the terminal device to switch. Of course, in the embodiment of the present application, the third information may also be transmitted after the first information.

[0089] In some implementations, the third information is a radio resource control (RRC) message. For example, the first information is physical layer signaling, and the third information is an RRC message.

[0090] In some implementations, the information indicating whether the terminal device performs the above-mentioned operation (for example, the first information or the third information) can be indicated at the granularity of the terminal device's bearer, that is, the indication of whether the above-mentioned operation is performed is indicated at the granularity of the bearer.

[0091] In some implementations, the method further includes: the network device sending configuration information to the terminal device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device so that the terminal device can identify the first bandwidth and the second bandwidth.

[0092] In the embodiments of the present application, the configuration information is not limited. For example, if the configuration information is used to configure a first bandwidth for a terminal device, the configuration information may be used to indicate the center frequency of the first bandwidth and / or the frequency domain width of the first bandwidth. For another example, if the configuration information is used to configure a second bandwidth for a terminal device, the configuration information may be used to indicate the center frequency of the second bandwidth and / or the frequency domain width of the second bandwidth.

[0093] In some implementations, the configuration information is carried in a radio resource control (RRC) configuration. Of course, the configuration information can also be carried in other information.

[0094] Embodiment 2: The first information is used to indicate activation of the first bandwidth.

[0095] In an embodiment of the present application, the terminal device can be activated based on the bandwidth granularity based on the first information, or in other words, the indication granularity of the first information is the bandwidth, without the need to activate based on the cell granularity as in the traditional solution.

[0096] In some implementations, the activation start time of the second bandwidth is earlier than the activation start time of the first bandwidth, and the deactivation time of the second bandwidth is later than the activation start time of the first bandwidth. In other words, the activation time of the first bandwidth partially overlaps with the activation time of the second bandwidth, which helps to improve the reliability of bandwidth-based communication of the terminal device. Of course, in the embodiment of the present application, the activation time of the first bandwidth does not overlap with the activation time of the second bandwidth.

[0097] In the embodiment of the present application, the activation start time of the second bandwidth is earlier than the activation start time of the first bandwidth. Therefore, the second bandwidth can also be called the "source bandwidth" and correspondingly, the first bandwidth can be called the "target bandwidth".

[0098] In some implementations, the second bandwidth may be located in the same cell as the first bandwidth (e.g., the first cell described above). In this case, the frequency domain position between the second bandwidth and the first bandwidth may be any of the positions described above in conjunction with Figures 4 to 8. Of course, in the embodiments of the present application, the second bandwidth and the first bandwidth may belong to different cells. For example, the first bandwidth belongs to a second cell, and the second cell is different from the first cell.

[0099] In the embodiments of the present application, the second cell is not limited. For example, the second cell may be a new cell proposed in the embodiments of the present application. In this case, the definition of the second cell is similar to that of the first cell, and reference may be made to the above description. Of course, in the embodiments of the present application, the second cell may be a traditional cell.

[0100] In some implementations, the method further includes: the network device sending second information to the terminal device, where the second information is used to instruct the terminal device to deactivate the second bandwidth, thereby helping to save power consumption of the terminal device. For example, after the network device instructs the terminal device to activate the first bandwidth, the network device may send the second information to the terminal device to instruct the terminal device to deactivate the second bandwidth.

[0101] In some implementations, activation of the first bandwidth is triggered based on the mobility of the terminal device. For example, if the terminal device moves from the service area corresponding to the second bandwidth to the service area corresponding to the first bandwidth, the activation may be triggered. Of course, in embodiments of the present application, activation of the first bandwidth may also be triggered based on the service needs of the terminal device. For example, if the service volume associated with the terminal device increases and the first bandwidth is greater than the first bandwidth, the activation may be triggered.

[0102] In some implementations, the first information may be carried in physical layer signaling, which helps reduce the latency of bandwidth activation by the terminal device. Of course, in the embodiment of the present application, the first information may also be carried in a MAC CE.

[0103] In some implementations, the first information includes one or more of the following: information for indicating whether to perform a MAC reset; information for indicating whether to change the key; information for indicating whether to re-establish the RLC entity; information for indicating whether to reconfigure the Packet Data Convergence Protocol PDCP; information for indicating whether to re-establish the Packet Data Convergence Protocol PDCP; information for indicating whether to perform data recovery on the Packet Data Convergence Protocol PDCP.

[0104] In some other implementations, the first information may be used to indicate one or more of the following: resetting MAC; changing keys; reestablishing RLC entities; reconfiguring PDCP; reestablishing PDCP; and recovering data from PDCP.

[0105] It should be noted that the first information can indicate the execution of the above operation in an implicit manner. For example, if the terminal device receives the first information, the terminal device can determine to execute the above operation. At this time, the first information may not carry information indicating the execution of the above operation, which helps to reduce the overhead of transmitting the first information. On the contrary, if the terminal device does not receive the first information, the terminal device confirms not to execute the above operation. Of course, in an embodiment of the present application, the first information can indicate the execution of the above operation in a displayed manner. For example, if the terminal device receives the first information, the terminal device can determine to execute the above operation. At this time, how the above operation is specifically executed needs to be determined by one or more bits carried in the first information, and these bits are used to indicate the information for executing the above operation.

[0106] In an embodiment of the present application, the first information can be used to indicate whether the terminal device is to perform the above-mentioned operation while indicating the activation of the bandwidth, which helps to reduce the delay required for the terminal device to activate the bandwidth. Of course, in an embodiment of the present application, the information indicating whether the terminal device is to perform the above-mentioned operation can be transmitted separately (for example, via third information transmission). That is, in some implementations, the above method further includes: the network device sends third information to the terminal device, wherein the third information is different from the first information.

[0107] In some implementations, the third information may be transmitted before the first information, which helps reduce the time delay required for the terminal device to switch. Of course, in the embodiment of the present application, the third information may also be transmitted after the first information.

[0108] In some implementations, the third information is an RRC message. For example, the first information is physical layer signaling, and the third information is an RRC message.

[0109] In some implementations, the information indicating whether the terminal device performs the above-mentioned operation (for example, the first information or the third information) can be indicated at the granularity of the terminal device's bearer, that is, the indication of whether the above-mentioned operation is performed is indicated at the granularity of the bearer.

[0110] In some implementations, the method further includes: the network device sending configuration information to the terminal device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device so that the terminal device can identify the first bandwidth and the second bandwidth.

[0111] In the embodiments of the present application, the configuration information is not limited. For example, if the configuration information is used to configure a first bandwidth for a terminal device, the configuration information may be used to indicate the center frequency of the first bandwidth and / or the frequency domain width of the first bandwidth. For another example, if the configuration information is used to configure a second bandwidth for a terminal device, the configuration information may be used to indicate the center frequency of the second bandwidth and / or the frequency domain width of the second bandwidth.

[0112] In some implementations, the configuration information is carried in a radio resource control (RRC) configuration. Of course, the configuration information can also be carried in other information.

[0113] Embodiment 3: The first information is used to configure a first bandwidth for a terminal device.

[0114] In the embodiments of the present application, the configuration information is not limited. For example, if the configuration information is used to configure a first bandwidth for a terminal device, the configuration information may be used to indicate the center frequency of the first bandwidth and / or the frequency domain width of the first bandwidth. For another example, if the configuration information is used to configure a second bandwidth for a terminal device, the configuration information may be used to indicate the center frequency of the second bandwidth and / or the frequency domain width of the second bandwidth.

[0115] In some implementations, the configuration information is carried in a radio resource control (RRC) configuration. Of course, the configuration information can also be carried in other information.

[0116] It should be noted that, in the embodiment of the present application, after the first information configures the first bandwidth for the terminal device, the terminal device may perform switching based on the first bandwidth, or activate the first bandwidth. For the specific process, please refer to the relevant introduction of Example 1 and Example 2. For the sake of brevity, it will not be repeated below.

[0117] For ease of understanding, the wireless communication method according to an embodiment of the present application is described below with reference to Figures 10 and 11. Assume that the first bandwidth is a first BWP and the second bandwidth is a second BWP.

[0118] As shown in FIG. 10 , in step S1010 , the network device sends configuration information to the terminal device. The configuration information is used to configure a first BWP and a second BWP for the terminal device.

[0119] In step S1020, the network device sends third information to the terminal device, where the third information includes one or more of the following: information indicating whether to perform a MAC reset for bearer 1, and information indicating whether to perform a key change for bearer 1.

[0120] In step S1030, the network device sends first information to the terminal device, where the first information is used to instruct the terminal device to switch from the first BWP to the second BWP.

[0121] Referring to FIG. 11 , in step S1110 , the network device sends configuration information to the terminal device, where the configuration information is used to configure a first BWP for the terminal device.

[0122] In step S1120, the network device sends first information to the terminal device, where the first information is used to instruct the terminal device to activate the first BWP.

[0123] In some implementations, the first information includes one or more of the following: information indicating whether a MAC reset is performed for bearer 1, information indicating whether a key change is performed for bearer 1; information indicating whether an RLC entity is re-established for bearer 1; information indicating whether a PDCP reconfiguration is performed for bearer 1; information indicating whether a PDCP re-establishment is performed for bearer 1; and information indicating whether data recovery is performed on PDCP for bearer 1.

[0124] In step S1130, the network device sends second information to the terminal device, where the second information is used to instruct the terminal device to deactivate the second BWP.

[0125] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 11. The device embodiment of the present application is described in detail below in conjunction with Figures 12 to 14. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0126] FIG12 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1200 shown in FIG12 includes: a receiving unit 1210 .

[0127] The receiving unit 1210 is configured to receive first information sent by a network device, where the first information is associated with a first bandwidth in a first cell, wherein the first information includes a plurality of different bandwidths.

[0128] In some implementations, the first information is used to instruct the terminal device to switch from the first bandwidth to the second bandwidth.

[0129] In some implementations, the first information is used to indicate activation of the first bandwidth.

[0130] In some implementations, the activation start time of the first bandwidth is later than the activation start time of the second bandwidth, and the deactivation time of the second bandwidth is later than the activation start time of the first bandwidth.

[0131] In some implementations, the terminal device further includes: the terminal device receiving second information sent by the network device, where the second information is used to instruct deactivation of the second bandwidth.

[0132] In some implementations, the indication granularity of the first information is the bandwidth in the first cell.

[0133] In some implementations, the first information is physical layer signaling or a media access control element MAC CE.

[0134] In some implementations, the first information includes one or more of the following: information for indicating whether to perform a MAC reset; information for indicating whether to change the key; information for indicating whether to re-establish the RLC entity; information for indicating whether to reconfigure the Packet Data Convergence Protocol PDCP; information for indicating whether to re-establish the PDCP; information for indicating whether to recover data from the PDCP; information for indicating a MAC reset; information for indicating a key change; information for indicating to re-establish the RLC entity; information for indicating to reconfigure the PDCP; information for indicating to re-establish the PDCP; information for indicating to recover data from the PDCP.

[0135] In some implementations, the receiving unit is further used to: receive third information sent by the network device, and the third information includes one or more of the following: information for indicating whether to reset MAC; information for indicating whether to switch keys; information for indicating whether to update the MAC entity; information for indicating whether to reconfigure PDCP; information for indicating whether to recover data; information for indicating MAC reset; information for indicating key change; information for indicating re-establishment of RLC entity; information for indicating reconfiguration of PDCP; information for indicating re-establishment of PDCP; information for indicating data recovery of PDCP.

[0136] In some implementations, the first information is physical layer signaling, and / or the third information is an RRC message.

[0137] In some implementations, the indication granularity of the first information and / or the third information is the bearer of the terminal device.

[0138] In some implementations, the receiving unit is further used to receive configuration information sent by the network device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device.

[0139] In some implementations, the configuration information is a radio resource control (RRC) configuration, and / or the first information is a physical layer signaling or a MAC CE.

[0140] In some implementations, the first information is used to configure the first bandwidth for the terminal device.

[0141] In some implementations, the first information is an RRC configuration.

[0142] In some implementations, the switching of the first bandwidth is triggered based on a service demand of the terminal device, or the switching of the first bandwidth is triggered based on the mobility of the terminal device.

[0143] In some implementations, the first bandwidth is a first bandwidth part BWP, and / or the second bandwidth is a second BWP.

[0144] In some implementations, the first bandwidth and the second bandwidth belong to the first cell, or the first bandwidth and the second bandwidth belong to different cells.

[0145] In some implementations, at least two of the multiple bandwidths satisfy one or more of the following: the at least two bandwidths are continuous in the frequency domain; the at least two bandwidths are discontinuous in the frequency domain; the at least two bandwidths are located in different frequency bands; the at least two bandwidths partially or completely overlap in the frequency domain.

[0146] FIG13 is a schematic diagram of a network device according to an embodiment of the present application. The network device 1300 shown in FIG13 includes: a sending unit 1310 .

[0147] The sending unit 1310 is configured to send first information to a terminal device, where the first information is associated with a first bandwidth in a first cell, wherein the first cell includes multiple different bandwidths.

[0148] In some implementations, the first information is used to instruct the terminal device to switch from the first bandwidth to the second bandwidth.

[0149] In some implementations, the first information is used to indicate activation of the first bandwidth.

[0150] In some implementations, the activation start time of the first bandwidth is later than the activation start time of the second bandwidth, and the deactivation time of the second bandwidth is later than the activation start time of the first bandwidth.

[0151] In some implementations, the sending unit is configured to send second information to the terminal device, where the second information is used to indicate deactivation of the second bandwidth.

[0152] In some implementations, the indication granularity of the first information is the bandwidth in the first cell.

[0153] In some implementations, the first information is physical layer signaling or a media access control element MAC CE.

[0154] In some implementations, the first information includes one or more of the following: information for indicating whether to perform a MAC reset; information for indicating whether to change the key; information for indicating whether to re-establish the RLC entity; information for indicating whether to reconfigure the Packet Data Convergence Protocol PDCP; information for indicating whether to re-establish the PDCP; information for indicating whether to recover data from the PDCP; information for indicating a MAC reset; information for indicating a key change; information for indicating to re-establish the RLC entity; information for indicating to reconfigure the PDCP; information for indicating to re-establish the PDCP; information for indicating to recover data from the PDCP.

[0155] In some implementations, the sending unit is used to send third information to the terminal device, and the third information includes one or more of the following: information for indicating whether to reset MAC; information for indicating whether to switch keys; information for indicating whether to update the MAC entity; information for indicating whether to reconfigure PDCP; information for indicating whether to recover data; information for indicating MAC reset; information for indicating key change; information for indicating re-establishment of RLC entity; information for indicating reconfiguration of PDCP; information for indicating re-establishment of PDCP; information for indicating data recovery of PDCP.

[0156] In some implementations, the first information is physical layer signaling, and / or the third information is an RRC message.

[0157] In some implementations, the indication granularity of the first information and / or the third information is the bearer of the terminal device.

[0158] In some implementations, the sending unit is used to send configuration information to the terminal device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device.

[0159] In some implementations, the configuration information is a radio resource control (RRC) configuration, and / or the first information is a physical layer signaling or a MAC CE.

[0160] In some implementations, the first information is used to configure the first bandwidth for the terminal device.

[0161] In some implementations, the first information is an RRC configuration.

[0162] In some implementations, the switching of the first bandwidth is triggered based on a service demand of the terminal device, or the switching of the first bandwidth is triggered based on the mobility of the terminal device.

[0163] In some implementations, the first bandwidth is a first bandwidth part BWP, and / or the second bandwidth is a second BWP.

[0164] In some implementations, the first bandwidth and the second bandwidth belong to the first cell, or the first bandwidth and the second bandwidth belong to different cells.

[0165] In some implementations, at least two of the multiple bandwidths satisfy one or more of the following: the at least two bandwidths are continuous in the frequency domain; the at least two bandwidths are discontinuous in the frequency domain; the at least two bandwidths are located in different frequency bands; the at least two bandwidths partially or completely overlap in the frequency domain.

[0166] In an optional embodiment, the receiving unit 1210 may be a transceiver 1430. The terminal device 1200 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0167] In an optional embodiment, the sending unit 1310 may be a transceiver 1430. The network device 1300 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0168] Figure 14 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 14 indicate that the unit or module is optional. Device 1400 may be used to implement the method described in the above method embodiment. Device 1400 may be a chip, a terminal device, or a network device.

[0169] The device 1400 may include one or more processors 1410. The processor 1410 may support the device 1400 to implement the method described in the method embodiment above. The processor 1410 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0170] The apparatus 1400 may further include one or more memories 1420. The memories 1420 store programs that can be executed by the processor 1410, causing the processor 1410 to perform the methods described in the above method embodiments. The memories 1420 may be independent of the processor 1410 or integrated into the processor 1410.

[0171] The apparatus 1400 may further include a transceiver 1430. The processor 1410 may communicate with other devices or chips via the transceiver 1430. For example, the processor 1410 may transmit and receive data with other devices or chips via the transceiver 1430.

[0172] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0173] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0174] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0175] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0176] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0177] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0178] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0179] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0180] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0181] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0182] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0183] In the several embodiments provided in this 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 schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0184] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0185] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0186] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part 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 process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0187] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for wireless communication, characterized in that, including: The terminal device receives first information sent by the network device, where the first information is associated with a first bandwidth in a first cell, and the first cell includes multiple different bandwidths.

2. The method according to claim 1, characterized in that, The first information is used to instruct the terminal device to switch from the first bandwidth to a second bandwidth.

3. The method according to claim 1, wherein The first information is used to instruct to activate the first bandwidth.

4. The method according to claim 3, wherein The activation start time of the first bandwidth is later than the activation start time of the second bandwidth, and the deactivation time of the second bandwidth is later than the activation start time of the first bandwidth.

5. The method according to claim 3 or 4, characterized in that, The method further includes: The terminal device receives second information sent by the network device, where the second information is used to instruct to deactivate the second bandwidth.

6. The method according to any one of claims 1-5, characterized in that, The indication granularity of the first information is the bandwidth in the first cell.

7. The method according to any one of claims 1-6, characterized in that, The first information is a physical layer signaling or a Media Access Control Control Element (MAC CE).

8. The method according to any one of claims 2-7, characterized in that, The first information includes one or more of the following: Information for indicating whether to perform MAC reset; Information for indicating whether to change keys; Information for indicating whether to re - establish a Radio Link Control (RLC) entity; Information for indicating whether to re - configure a Packet Data Convergence Protocol (PDCP); Information for indicating whether to re - establish PDCP; Information for indicating whether to perform PDCP data recovery; Information for indicating to perform MAC reset; Information for indicating to change keys; Information for indicating to re - establish the RLC entity; Information for indicating to re - configure PDCP; Information for indicating to re - establish PDCP; Information for indicating to perform PDCP data recovery.

9. The method according to any one of claims 2-7, characterized in that, The method further includes: The terminal device receives third information sent by the network device, where the third information includes one or more of the following: Information for indicating whether to perform MAC reset; Information for indicating whether to switch keys; Information for indicating whether to update a MAC entity; Information for indicating whether to re - configure PDCP; Information for indicating whether to perform data recovery; Information for indicating to perform MAC reset; Information for indicating to change keys; Information for indicating to re - establish the RLC entity; Information for indicating to re - configure PDCP; Information for indicating to re - establish PDCP; Information for indicating to perform PDCP data recovery.

10. The method according to claim 9, wherein The first information is a physical layer signaling, and / or the third information is a Radio Resource Management (RRC) message.

11. The method according to any one of claims 8 to 10, characterized in that, The indication granularity of the first information and / or the third information is the bearer of the terminal device.

12. The method according to any one of claims 2-5, characterized in that, The method further includes: The terminal device receives configuration information sent by the network device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device.

13. The method according to claim 12, wherein The configuration information is an RRC configuration, and / or The first information is a physical layer signaling or a MAC CE.

14. The method according to claim 1, characterized in that, The first information is used to configure the first bandwidth for the terminal device.

15. The method according to claim 14, wherein The first information is an RRC configuration.

16. The method according to any one of claims 1 to 15, characterized in that, The handover for the first bandwidth is triggered based on the service requirements of the terminal device, or The handover for the first bandwidth is triggered based on the mobility of the terminal device.

17. The method according to any one of claims 2-5 and 12, characterized in that, The first bandwidth is the first bandwidth part BWP, and / or the second bandwidth is the second BWP.

18. The method according to any one of claims 2-5, 12, and 17, characterized in that, The first bandwidth and the second bandwidth belong to the first cell, or The first bandwidth and the second bandwidth belong to different cells.

19. The method according to any one of claims 1-18, characterized in that, At least two of the multiple bandwidths satisfy one or more of the following: The at least two bandwidths are continuous in the frequency domain; The at least two bandwidths are discontinuous in the frequency domain; The at least two bandwidths are located in different frequency bands; The at least two bandwidths partially or fully overlap in the frequency domain.

20. A method for wireless communication, characterized in that, including: The network device sends first information to the terminal device, and the first information is associated with the first bandwidth in the first cell, where the first cell includes multiple different bandwidths.

21. The method according to claim 20, wherein, The first information is used to instruct the terminal device to hand over from the first bandwidth to the second bandwidth.

22. The method according to claim 20, wherein The first information is used to instruct to activate the first bandwidth.

23. The method according to claim 22, wherein The activation start time of the first bandwidth is later than the activation start time of the second bandwidth, and the deactivation time of the second bandwidth is later than the activation start time of the first bandwidth.

24. The method according to claim 22 or 23, characterized in that, The method further includes: The network device sends second information to the terminal device, and the second information is used to instruct to deactivate the second bandwidth.

25. The method according to any one of claims 20-24, characterized in that, The indication granularity of the first information is the bandwidth in the first cell.

26. The method according to any one of claims 20-25, characterized in that, The first information is a physical layer signaling or a media access control control element MAC CE.

27. The method according to any one of claims 21-26, characterized in that, The first information includes one or more of the following: Information for indicating whether to perform MAC reset; Information for indicating whether to change the key; Information for indicating whether to re - establish the RLC entity; Information for indicating whether to re - configure the packet data convergence protocol PDCP; Information for indicating whether to re - establish the PDCP; Information for indicating whether to perform data recovery on the PDCP; Information for indicating to perform MAC reset; Information for indicating to change the key; Information for indicating to re - establish the RLC entity; Information for indicating to re - configure the PDCP; Information for indicating to re - establish the PDCP; Information for indicating to perform data recovery on the PDCP.

28. The method according to any one of claims 21-26, characterized in that The method further includes: The network device sends third information to the terminal device, and the third information includes one or more of the following: Information for indicating whether to perform MAC reset; Information for indicating whether to switch the key; Information for indicating whether to update the MAC entity; Information for indicating whether to re - configure the PDCP; Information for indicating whether to perform data recovery; Information for indicating to perform MAC reset; Information for indicating to change the key; Information for indicating to re - establish the RLC entity; Information for indicating to re - configure the PDCP; Information for indicating to re - establish the PDCP; Information for indicating to perform data recovery on the PDCP.

29. The method according to claim 28, wherein The first information is a physical layer signaling, and / or the third information is an RRC message.

30. The method according to claim 27 or 28, characterized in that The indication granularity of the first information and / or the third information is the bearer of the terminal device.

31. The method according to any one of claims 21-24, characterized in that, The method further includes: The network device sends configuration information to the terminal device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device.

32. The method according to claim 31, wherein The configuration information is radio resource control (RRC) configuration, and / or The first information is a physical layer signaling or a MAC CE.

33. The method according to claim 20, wherein, The first information is used to configure the first bandwidth for the terminal device.

34. The method according to claim 33, wherein The first information is an RRC configuration.

35. The method according to any one of claims 20-34, characterized in that, The handover for the first bandwidth is triggered based on the service requirements of the terminal device, or The handover for the first bandwidth is triggered based on the mobility of the terminal device.

36. The method according to any one of claims 20 - 35, characterized in that, The first bandwidth is a first bandwidth part (BWP), and / or the second bandwidth is a second BWP.

37. The method according to any one of claims 21 - 24, 31 and 36, characterized in that, The first bandwidth and the second bandwidth belong to the first cell, or The first bandwidth and the second bandwidth belong to different cells.

38. The method according to any one of claims 20-37, characterized in that, At least two of the multiple bandwidths satisfy one or more of the following: The at least two bandwidths are continuous in the frequency domain; The at least two bandwidths are discontinuous in the frequency domain; The at least two bandwidths are located in different frequency bands; The at least two bandwidths partially or fully overlap in the frequency domain.

39. A terminal device, characterized in that, including: a receiving unit, configured to receive first information sent by a network device, where the first information is associated with a first bandwidth in a first cell, and where the first cell includes multiple different bandwidths.

40. The terminal device according to claim 39, characterized in that, The first information is used to instruct the terminal device to hand over from the first bandwidth to a second bandwidth.

41. The terminal device according to claim 39, wherein, The first information is used to instruct to activate the first bandwidth.

42. The terminal device according to claim 41, wherein, The activation start time of the first bandwidth is later than the activation start time of the second bandwidth, and the deactivation time of the second bandwidth is later than the activation start time of the first bandwidth.

43. The terminal device according to claim 41 or 42, characterized in that, The terminal device further includes: The terminal device receives second information sent by the network device, where the second information is used to instruct to deactivate the second bandwidth.

44. The terminal device according to any one of claims 39-43, characterized in that, The indication granularity of the first information is the bandwidth in the first cell.

45. The terminal device according to any one of claims 39-44, characterized in that, The first information is a physical layer signaling or a media access control control element (MAC CE).

46. The terminal device according to any one of claims 40-45, characterized in that, The first information includes one or more of the following: information used to indicate whether to perform MAC reset; information used to indicate whether to change keys; information used to indicate whether to re - establish an RLC entity; information used to indicate whether to re - configure a packet data convergence protocol (PDCP); information used to indicate whether to re - establish a PDCP; information used to indicate whether to perform PDCP data recovery; information used to indicate to perform MAC reset; information used to indicate to change keys; information used to indicate to re - establish an RLC entity; information used to indicate to re - configure a PDCP; information used to indicate to re - establish a PDCP; information used to indicate to perform PDCP data recovery.

47. The terminal device according to any one of claims 40-45, characterized in that, The receiving unit is further configured to: receive third information sent by the network device, where the third information includes one or more of the following: information used to indicate whether to perform MAC reset; information used to indicate whether to switch keys; information used to indicate whether to update a MAC entity; information used to indicate whether to re - configure a PDCP; information used to indicate whether to perform data recovery; Information for indicating MAC reset; Information for indicating key transformation; Information for indicating re - establishment of the RLC entity; Information for indicating re - configuration of the PDCP; Information for indicating re - establishment of the PDCP; Information for indicating data recovery of the PDCP.

48. The terminal device according to claim 47, wherein The first information is a physical layer signaling, and / or the third information is an RRC message.

49. The terminal device according to any one of claims 46-48, characterized in that, The indication granularity of the first information and / or the third information is the bearer of the terminal device.

50. The terminal device according to any one of claims 39-49, characterized in that, The receiving unit is further configured to: Receive configuration information sent by the network device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device.

51. The terminal device according to claim 50, wherein, The configuration information is a Radio Resource Control (RRC) configuration, and / or The first information is a physical layer signaling or a MAC CE.

52. The terminal device according to claim 39, characterized in that, The first information is used to configure the first bandwidth for the terminal device.

53. The terminal device according to claim 52, wherein The first information is an RRC configuration.

54. The terminal device according to any one of claims 39-53, characterized in that, The handover for the first bandwidth is triggered based on the service requirements of the terminal device, or The handover for the first bandwidth is triggered based on the mobility of the terminal device.

55. The terminal device according to any one of claims 40-43, characterized in that, The first bandwidth is a first Bandwidth Part (BWP), and / or the second bandwidth is a second BWP.

56. The terminal device according to any one of claims 40 - 43, 52, and 55, characterized in that, The first bandwidth and the second bandwidth belong to the first cell, or The first bandwidth and the second bandwidth belong to different cells.

57. The terminal device according to any one of claims 39-56, characterized in that, At least two of the multiple bandwidths satisfy one or more of the following: The at least two bandwidths are continuous in the frequency domain; The at least two bandwidths are discontinuous in the frequency domain; The at least two bandwidths are located in different frequency bands; The at least two bandwidths partially or fully overlap in the frequency domain.

58. A network device, characterized in that, Comprising: A sending unit, configured to send first information to a terminal device, where the first information is associated with a first bandwidth in a first cell, and where the first cell includes multiple different bandwidths.

59. The network device according to claim 58, wherein The first information is used to indicate that the terminal device switches from the first bandwidth to a second bandwidth.

60. The network device according to claim 58, characterized in that, The first information is used to indicate activation of the first bandwidth.

61. The network device according to claim 60, wherein, The activation start time of the first bandwidth is later than the activation start time of the second bandwidth, and the de - activation time of the second bandwidth is later than the activation start time of the first bandwidth.

62. The network device according to claim 60 or 61, characterized in that, The sending unit is configured to send second information to the terminal device, where the second information is used to indicate de - activation of the second bandwidth.

63. The network device according to any one of claims 58-62, characterized in that, The indication granularity of the first information is the bandwidth in the first cell.

64. The network device according to any one of claims 58-63, characterized in that, The first information is a physical layer signaling or a Medium Access Control Control Element (MAC CE).

65. The network device according to any one of claims 59-64, characterized in that, The first information includes one or more of the following: Information for indicating whether to perform MAC reset; Information for indicating whether to transform the key; Information for indicating whether to re - establish the RLC entity; Information for indicating whether to re - configure the Packet Data Convergence Protocol (PDCP); Information for indicating whether to re - establish the PDCP; Information for indicating whether to perform data recovery of the PDCP; Information for indicating MAC reset; Information for indicating key transformation; Information for indicating re - establishment of the RLC entity; Information for indicating re - configuration of the PDCP; Information for indicating PDCP re - establishment; Information for indicating PDCP data recovery.

66. The network device according to any one of claims 59-64, characterized in that, The sending unit is configured to send third information to the terminal device, where the third information includes one or more of the following: Information for indicating whether to perform MAC reset; Information for indicating whether to switch keys; Information for indicating whether to update the MAC entity; Information for indicating whether to re - configure PDCP; Information for indicating whether to perform data recovery; Information for indicating MAC reset; Information for indicating key transformation; Information for indicating RLC entity re - establishment; Information for indicating PDCP re - configuration; Information for indicating PDCP re - establishment; Information for indicating PDCP data recovery.

67. The network device according to claim 66, characterized in that, The first information is a physical layer signaling, and / or the third information is an RRC message.

68. The network device according to any one of claims 65-67, characterized in that, The indication granularity of the first information and / or the third information is the bearer of the terminal device.

69. The network device according to any one of claims 58-62, characterized in that, The sending unit is further configured to send configuration information to the terminal device, where the configuration information is used to configure the first bandwidth and / or the second bandwidth for the terminal device.

70. The network device according to claim 69, wherein The configuration information is a radio resource control (RRC) configuration, and / or The first information is a physical layer signaling or a MAC CE.

71. The network device according to claim 58, wherein The first information is used to configure the first bandwidth for the terminal device.

72. The network device according to claim 71, characterized in that, The first information is an RRC configuration.

73. The network device according to any one of claims 58-72, characterized in that, The handover for the first bandwidth is triggered based on the service requirements of the terminal device, or The handover for the first bandwidth is triggered based on the mobility of the terminal device.

74. The network device according to any one of claims 58 - 62, and 69, characterized in that, The first bandwidth is a first bandwidth part (BWP), and / or the second bandwidth is a second BWP.

75. The network device according to any one of claims 58 - 62, 69, and 74, characterized in that, The first bandwidth and the second bandwidth belong to the first cell, or The first bandwidth and the second bandwidth belong to different cells.

76. The network device according to any one of claims 58-75, characterized in that, At least two of the multiple bandwidths satisfy one or more of the following: The at least two bandwidths are continuous in the frequency domain; The at least two bandwidths are discontinuous in the frequency domain; The at least two bandwidths are located in different frequency bands; The at least two bandwidths partially or fully overlap in the frequency domain.

77. A terminal device, characterized in that, Comprising a transceiver, a memory, and a processor, where the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals, so that the terminal device executes the method according to any one of claims 1 - 19.

78. A network device, characterized in that, Comprising a transceiver, a memory, and a processor, where the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals, so that the network device executes the method according to any one of claims 20 - 38.

79. A device, characterized in that, Comprising a processor, configured to call a program from a memory, so that the device executes the method according to any one of claims 1 - 38.

80. A chip, characterized in that, Comprising a processor, configured to call a program from a memory, such that the device installed with the chip executes the method according to any one of claims 1 - 38.

81. A computer-readable storage medium, characterized in that, Having a program stored thereon, where the program causes a computer to execute the method according to any one of claims 1 - 38.

82. A computer program product, characterized in that, Comprising a program that causes a computer to perform the method according to any one of claims 1-38.

83. A computer program, characterized in that, The computer program causes a computer to perform the method according to any one of claims 1-38.

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