Communication method and communication device

Abstract

The embodiment of the invention discloses a communication method and a communication device, relates to the technical field of communication, and is used for realizing activation of a plurality of auxiliary cells under the condition that the number of the auxiliary cells needing to be activated exceeds the maximum number of cells supported by the carrier aggregation capability of terminal equipment. The method comprises: after receiving indication information for indicating activation of a plurality of secondary cells, a terminal device activates the plurality of secondary cells, one or more secondary cells in the activated secondary cells being in a first activated BWP; wherein the sum of the number of the activated auxiliary cells and the number of the activated auxiliary cells of the terminal equipment exceeds the difference value between the maximum number of the cells supported by the aggregation capability of the terminal equipment and 1.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a communication method and a communication device. Background Art

[0002] With the development of communication technology, in order to solve the problem of limited bandwidth of a single carrier, multiple component carriers (CCs) can be aggregated based on carrier aggregation (CA), so as to provide data services for terminal devices. In carrier aggregation, there can be multiple cells providing services for terminal devices. For example, it can include a primary cell and one or more secondary cells.

[0003] Normally, the cells (or carrier resources) configured for terminal devices are limited. Therefore, the terminal device can activate the configured cells according to service requirements and use the activated cells for data transmission. However, when the number of cells configured for the terminal device exceeds the carrier aggregation capability supported by the terminal device, for example, when the terminal device needs to send high-speed services, how the terminal device activates the cells becomes a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application provide a communication method and a communication device for activating multiple cells when the cells configured for a terminal device exceed the carrier aggregation capability supported by the terminal device.

[0005] In a first aspect, a communication method is provided, the method comprising: a terminal device receives indication information for indicating activation of K secondary cells, the sum of the number of the K cells and the number of cells activated by the terminal device exceeds the difference between the number of maximum cells supported by the carrier aggregation capability supported by the terminal device and 1. For example, if the terminal device has activated S secondary cells, K+S is greater than N-1, wherein N represents the number of maximum cells supported by the carrier aggregation capability supported by the terminal device. The terminal device can activate the K secondary cells, and the BWP of one or more secondary cells in the K secondary cells after activation is in the first activated BWP (such as the first activated downlink BWP or the first activated uplink BWP). The number of the one or more secondary cells is less than or equal to N-1. The above K and N are both positive integers, and S is an integer greater than or equal to 0.

[0006] In the embodiment of the present application, since the number of secondary cells indicated to be activated and the number of secondary cells activated by the terminal device plus the number of primary service cells of the terminal device (i.e., 1) exceed the maximum number of cells supported by the carrier aggregation capability of the terminal device, at this time, the terminal device can activate the K secondary cells, and the BWP of one or more secondary cells in the K secondary cells after activation is in the first activated BWP. The number of the one or more secondary cells is less than or equal to the difference between the number of cells supported by the carrier aggregation capability of the terminal device and 1. In this way, when the terminal device activates the K secondary cells, the number of secondary cells in the activated BWP can also meet the number of cells supported by the carrier aggregation capability of the terminal device, thereby ensuring normal data transmission of the terminal device.

[0007] In a possible implementation, when K is less than N and S is greater than 0, that is, the number of activated secondary cells indicated does not exceed the maximum number of cells supported by the carrier aggregation capability of the terminal device, and the terminal device has activated cells before receiving the indication information, the terminal device can switch the BWP of the S activated secondary cells to the special dormant BWP. Since the secondary cell where the special dormant BWP is located does not occupy the carrier aggregation capability supported by the terminal device or the terminal device does not receive and / or parse information (such as PDSCH) on the special dormant BWP, the terminal device may have additional capabilities to activate other secondary cells.

[0008] In a possible implementation, the K secondary cells are in the first activated BWP after being activated, so as to ensure that the terminal device has enough secondary cells for data transmission.

[0009] In a possible implementation, the switching delay of the K secondary cells is related to the HARQ delay, the BWP switching delay, the cell activation delay and the CSI reporting delay.

[0010] In one example, the switching delay T of the K secondary cells is less than or equal to T1. T1 is related to HARQ delay, BWP switching delay, cell activation delay and CSI reporting delay. For example, T1=T HARQ +T BWP_switch +T activation_time_multiple_scells +T CSI_reporting Among them, T HARQ Indicates HARQ delay, T activation_time_multiple_scells Indicates the cell activation delay, T CSI_reporting Indicates the CSI reporting delay, T BWP_switch Indicates the BWP switching delay.

[0011] In one possible implementation, when K is greater than or equal to N, that is, indicating that the number of activated secondary cells exceeds the maximum number of cells supported by the carrier aggregation capability of the terminal device, if S is greater than 0, that is, the terminal device has an activated secondary cell, the terminal device can switch the activated BWP to a special dormant BWP. In this way, it is ensured that the terminal device has sufficient capacity to activate other secondary cells. For example, the terminal device can activate L (L is less than K and L+N-1 is greater than or equal to K) secondary cells out of the K secondary cells, and the L secondary cells are in a special dormant BWP after activation. For the remaining unactivated X (X=KL) secondary cells out of the K secondary cells, the terminal device can continue to activate the remaining X secondary cells, and the X secondary cells are in the first activated BWP after activation.

[0012] In a possible implementation, the terminal device can activate the above L secondary cells through P rounds. That is, in each round, the terminal device can select N-1 secondary cells for activation according to the preset order of the cell numbers of the secondary cells (such as from large to small or from small to large). The N-1 secondary cells activated in each round are in a special dormant BWP after activation. Wherein, P*(N-1)=L, and P is a positive integer.

[0013] In a possible implementation, when X is less than N-1, that is, when the number of secondary cells in the activated BWP does not exceed the maximum number of cells supported by the carrier aggregation capability of the terminal device and the excess value of 1, it indicates that the terminal device also has additional carrier aggregation capabilities, and the terminal device can switch the BWPs of R secondary cells in the secondary cells in the special dormant BWP from the special dormant BWP to the first activated BWP, where R = N-1-X. That is, the number of the R secondary cells and the number of cells in the activated BWP is consistent with the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0014] In one example, the R secondary cells may be secondary cells with larger cell numbers among the secondary cells in special dormant BWP. For example, if the BWP in special dormant is 10, the R secondary cells may be 5 secondary cells with larger cell numbers among the 10 secondary cells.

[0015] In a possible implementation, when K is greater than or equal to N, the activation delay of the K secondary cells is related to the HARQ delay, the BWP delay, the cell activation delay and the CSI reporting delay, as well as K and N.

[0016] In one scenario, the activation delay T of the K secondary cells is less than or equal to T2. T2 is related to HARQ delay, BWP delay, cell activation delay, CSI reporting delay, K, and N. For example, T2 = T HARQ +T BWP_switch *M1+T activation_time_multiple_scells *M2+TCSI_reporting Among them, T HARQ Indicates HARQ delay, T activation_time_multiple_scells Indicates the cell activation delay, T CSI_reporting Indicates the CSI reporting delay, T BWP_switch Indicates the BWP switching delay.

[0017] In another scenario, the activation delay T of the K secondary cells is less than or equal to T3. T3 is related to HARQ delay, BWP delay, cell activation delay, CSI reporting delay, K, and N. For example, T3=T HARQ +T BWP_switch *(M1+1)+T activation_time_multiple_scells *M2+T CSI_reporting Among them, T HARQ Indicates HARQ delay, T activation_time_multiple_scells Indicates the cell activation delay, T CSI_reporting Indicates the CSI reporting delay, T BWP_switch Indicates the BWP switching delay.

[0018] In the above two scenarios, M1 and M2 are both related to K and N. For example, M2 = ceil(K / (N-1)). Wherein, ceil(x) represents the smallest integer greater than or equal to x. M1 is related to K, N and S. For example, when S is 0, that is, when the indication information is received, the terminal device does not have an activated secondary cell, M1 = ceil(K / (N-1))-1. When S is greater than 0, that is, when the indication information is received, the terminal device has an activated secondary cell, M1 = ceil(K / (N-1)).

[0019] In a possible implementation manner, the terminal device may send data to the network device through the one or more secondary cells, or receive data through the one or more secondary cells.

[0020] In a second aspect, a communication method is provided, the method comprising: a network device sends an indication message for indicating activation of K secondary cells to a terminal device, the K secondary cells are activated, and one or more of the activated secondary cells are in a first activation BWP. The number of the one or more secondary cells is less than or equal to N-1. K+S is greater than N-1. S represents the number of secondary cells activated by the terminal device, and N represents the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0021] In a possible implementation, when S is greater than 0, the network device switches the BWPs of the S secondary cells from the activated BWP to the special dormant BWP. The secondary cell where the special dormant BWP is located does not occupy the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0022] In a possible implementation, the network device sends data to the terminal device through the one or more secondary cells, or receives data from the terminal device through the one or more secondary cells.

[0023] As a possible implementation method, the network device may also configure the activation delay T of the K secondary cells for the terminal device.

[0024] In one example, T is related to HARQ delay, BWP delay, cell activation delay and CSI reporting delay.

[0025] For example, T is less than or equal to T1. T1 = T HARQ +T BWP_switch +T activation_time_multiple_scells +T CSI_reporting Among them, T HARQ Indicates HARQ delay, T activation_time_multiple_scells Indicates the cell activation delay, T CSI_reporting Indicates the CSI reporting delay, T BWP_switch Indicates the BWP switching delay.

[0026] In another example, T is related to HARQ delay, BWP delay, cell activation delay, CSI reporting delay, K and N.

[0027] For example, T is less than or equal to T2. T2 = T2 = T HARQ +T BWP_switch *M1+T activation_time_multiple_scells *M2+T CSI_reporting Among them, T HARQ Indicates HARQ delay, T activation_time_multiple_scells Indicates the cell activation delay, T CSI_reporting Indicates the CSI reporting delay, T BWP_switch Indicates the BWP switching delay.

[0028] For another example, T is less than or equal to T3. T3 = T HARQ +T BWP_switch *(M1+1)+T activation_time_multiple_scells *M2+T CSI_reporting Among them, T HARQ Indicates HARQ delay, T activation_time_multiple_scells Indicates the cell activation delay, T CSI_reporting Indicates the CSI reporting delay, T BWP_switch Indicates the BWP switching delay.

[0029] Among them, in the above two examples, M1 and M2 are both related to K and N. For example, M2 = ceil(K / (N-1)). Among them, ceil(x) represents the smallest integer greater than or equal to x. M1 is related to K, N and S. For example, when S is 0, that is, when the indication information is received, the terminal device does not have an activated secondary cell, M1 = ceil(K / (N-1))-1. When S is greater than 0, that is, when the indication information is received, the terminal device has an activated secondary cell, M1 = ceil(K / (N-1)).

[0030] In a third aspect, a communication device is provided for implementing the above-mentioned various methods. The communication device may be a terminal device in the above-mentioned first aspect or any of its implementations, or a device having the functions of the above-mentioned terminal device, or a device included in the above-mentioned terminal device, such as a chip. The communication device includes a module, unit, or means corresponding to the above-mentioned method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.

[0031] In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is used to implement the sending and / or receiving functions in any of the above aspects and any possible implementations thereof. The transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface. The processing module may be used to implement the processing functions in any of the above aspects and any possible implementations thereof.

[0032] In some possible designs, the transceiver module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementation methods thereof.

[0033] In a fourth aspect, a communication device is provided for implementing the above-mentioned various methods. The communication device may be a network device in the above-mentioned second aspect or any implementation thereof, or a device having the functions of the above-mentioned network device, or a device included in the above-mentioned network device, such as a chip. The communication device includes a module, unit, or means corresponding to the above-mentioned method, which may be implemented by hardware, software, or by executing corresponding software implementation by hardware. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.

[0034] In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is used to implement the sending and / or receiving functions in any of the above aspects and any possible implementations thereof. The transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface. The processing module may be used to implement the processing functions in any of the above aspects and any possible implementations thereof.

[0035] In some possible designs, the transceiver module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementation methods thereof.

[0036] In a fifth aspect, a communication device is provided, comprising: at least one processor; the processor is used to execute a computer program or instruction stored in a memory through a logic circuit and / or communication, so that the communication device executes the method described in any one of the above aspects.

[0037] In a possible implementation, the communication device further includes the memory. Optionally, the memory is integrated with the processor, or the memory may be independent of the processor.

[0038] In a possible implementation, the memory is independent of the communication device.

[0039] In a possible implementation, the communication device further includes a communication interface, and the communication interface is used to communicate with a module outside the communication device.

[0040] The communication device may be a terminal device in the above-mentioned first aspect or any one of its implementations, or a device included in the above-mentioned terminal device, such as a chip.

[0041] In a sixth aspect, a communication device is provided, comprising: at least one processor; the processor is used to execute a computer program or instruction stored in a memory through a logic circuit and / or communication, so that the communication device executes the method described in any one of the above aspects.

[0042] In a possible implementation, the communication device further includes the memory. Optionally, the memory is integrated with the processor, or the memory may be independent of the processor.

[0043] In a possible implementation, the memory is independent of the communication device.

[0044] In a possible implementation, the communication device further includes a communication interface, and the communication interface is used to communicate with a module outside the communication device.

[0045] The communication device may be the network device in the second aspect or any implementation manner thereof, or a device included in the network device, such as a chip.

[0046] In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the above aspects or any one of its implementation methods.

[0047] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the above aspects or any one of its implementations.

[0048] In a ninth aspect, a communication device (for example, the communication device may be a chip or a chip system) is provided, wherein the communication device includes a processor for implementing the functions involved in any of the above aspects or any of its implementation methods.

[0049] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0050] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0051] It can be understood that when the communication device provided in any one of the fifth to ninth aspects is a chip, the above-mentioned sending action / function can be understood as output, and the above-mentioned receiving action / function can be understood as input.

[0052] Among them, the technical effects brought about by any design method in the fifth to ninth aspects can refer to the technical effects brought about by different design methods in the above-mentioned first or second aspects, and will not be repeated here.

[0053] In a tenth aspect, a communication system is provided, the communication system comprising a terminal device and a network device. The terminal device can execute the method described in the first aspect or any implementation thereof, and the network device can execute the method described in the second aspect or any implementation thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0055] Figure 2 It is a schematic diagram of carrier resources owned by a communication operator provided in an embodiment of the present application;

[0056] Figure 3 This is a schematic diagram of the CA capability ratio of a terminal device provided in an embodiment of the present application;

[0057] Figure 4It is a schematic diagram of a cell switching based on L1 / L2 triggered mobility (layer1 / layer2triggered mobility, L1 / L2 LTM) provided in an embodiment of the present application;

[0058] Figure 5 It is a schematic diagram of uplink carrier switching based on UL transmission (transmit, Tx) switching provided in an embodiment of the present application;

[0059] Figure 6 It is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0060] Figure 7 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0061] Figure 8 It is a flow chart of a communication method provided in an embodiment of the present application;

[0062] Fig. 9 is a schematic diagram of activation of a secondary cell provided in an embodiment of the present application;

[0063] Fig.10 is a schematic diagram of another secondary cell activation provided in an embodiment of the present application;

[0064] Fig.11 It is a structural diagram of a terminal device provided in an embodiment of the present application;

[0065] Fig.12 It is a structural diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] To facilitate understanding of the technical solutions provided by the embodiments of the present application, a brief introduction to the related technologies of the present application is first given. The brief introduction is as follows:

[0067] Carrier aggregation (CA): CA is to aggregate two or more component carriers (CCs) to provide services to user equipment (UE) to support more transmission bandwidth. In this way, the problem of limited bandwidth of a single carrier can be solved.

[0068] In carrier aggregation, there can be multiple cells serving a single UE, that is, a UE can have multiple serving cells. Figure 1As shown, a UE may have one primary cell (PCell) and one or more secondary cells (SCell) (such as Figure 1 Only 2 SCells are shown).

[0069] Among them, PCell can be the cell where the UE establishes the initial connection, or the cell where the radio resource control (RRC) connection is reestablished, or the primary cell specified during the handover process. PCell can be used for RRC communication between UEs. The carrier unit corresponding to PCell can be called the primary component carrier (PCC). Among them, the downlink carrier of PCell can be called the downlink (DL) PCC, and the uplink carrier can be called the uplink (UL) PCC.

[0070] Typically, a serving cell may include one downlink carrier, one downlink carrier and one uplink carrier, or one downlink carrier and two uplink carriers. Therefore, a serving cell may correspond one to one downlink carrier. In the embodiment of the present application, the concepts of carrier (which may refer to a downlink carrier) and cell may be interchangeable.

[0071] At present, the carrier resources owned by communication operators are generally 4CC-5CC. In the future, communication operators may have more frequency points. Figure 2 As shown in the figure, communication operator A has 5CCs, which are 2.6G*2CC+4.9G*2CC+700M*1CC. Communication operator B has 5CCs, which are 3.5G*2CC+2.1G*1CC+900M*2CC. Communication operator C has 6CCs, which are 3.5G*2CC+2.1G*2CC+700M*2CC. In the future, with the introduction of 1.8G*1CC+F band*1CC+A band*1CC, and several CCs of U6G, communication operators are expected to have more carrier resources. Figure 2 In the figure, a square represents a CC, a filled square represents a CC that has been deployed by the communication operator, and a blank square represents a CC that is planned to be deployed.

[0072] However, commercial terminal equipment is subject to cost constraints, and the maximum number of physical downlink shared channels (PDSCH) that the baseband processing unit can process is limited, resulting in a limit on the number of carriers that the terminal equipment can support simultaneously. Specifically, each PDSCH requires an independent baseband processing unit, such as fast Fourier transform (FFT), POST-FFT data buffering, etc. The more PDSCHs that can be processed at the same time, the greater the baseband implementation cost. Most current commercial terminals only have 2CC CA capabilities, or even do not support CA. Figure 3 As shown, currently, the number of terminal devices with 2CC CA capabilities accounts for 5% of the market, the number of terminal devices with 3CC CA capabilities accounts for 40%, and the number of terminal devices that do not support CA accounts for 55%.

[0073] In some scenarios, for a terminal device with CA capability, CC needs to be activated for CA. Currently, in the protocol, the maximum time from when the UE receives the SCell activation instruction to when the UE completes the SCell activation, that is, a minimum requirement is defined.

[0074] The SCel activation instruction may be carried by layer 2 signaling, for example, by a medium access control element (MAC CE), and the MAC CE may be carried by a PDSCH.

[0075] Assume that the UE receives an SCell activation instruction in time slot n, and the SCell activation instruction indicates the activation of multiple SCells. For each SCell instructed to be activated, the UE should complete the reporting of the effective channel state information (CSI) of the activated SCell and apply other indicated actions in the activation instruction no later than time slot n1. In other words, the terminal device completes the activation of the SCell at the latest in time slot n1.

[0076] The calculation method of time slot n1 can be shown in Formula 1.

[0077]

[0078] Among them, T HARQIndicates the hybrid automatic repeat request (HARQ) delay. The HARQ delay may refer to the time it takes for the UE to receive the physical downlink shared channel (PDSCH) and send an acknowledgement message. activation_time_multiple_scells Indicates the activation delay of the secondary cell. CSI_reporting Indicates the CSI reporting delay. NR_slot_length indicates the length of a time slot.

[0079] From formula 1, we can see that the activation delay of SCell is related to HARQ delay, cell activation delay and CSI reporting delay. If the UE knows the SCell to be activated and the CSI-RS used for CSI reporting is periodic, the activation delay of multiple SCells is the same as the activation delay of a single SCell. That is, T in formula 1 is activation_time_multiple_scells The activation delay is the same as that of a single SCell, where the cell activation delay includes the time for switching and preparing the baseband and / or radio frequency links.

[0080] In existing communication protocols, the number of CCs configured by network devices for terminal devices is generally less than or equal to the maximum number of carriers supported by the terminal devices. However, when the number of carriers deployed in the network is far greater than the carrier capacity that the terminal devices can handle simultaneously, in order to maximize the user experience, it is necessary to enable the terminal devices to flexibly use the preferred carrier resources with limited capabilities.

[0081] In one example, Figure 4 As shown, it is a schematic diagram of a cell switching based on L1 / L2 triggered mobility (layer1 / layer2triggered mobility, L1 / L2LTM). Figure 4 In the process, the network side configures multiple service cells (CC1~CC4) for the terminal device. The number of configured service cells (4) is greater than the number of carriers supported by the terminal device (2). Only activated service cells are counted in the capacity consumption of the terminal device. LTM technology can use layer 2 signaling to indicate the switching of cells, and the switching time is about 10 milliseconds (ms). Among them, MAC CE activation signaling takes about 5ms, abstract syntax notation one.decoding (ASN.1.decoding) + L2 / 3re-cfg takes 1~6ms, and baseband (BB) retuning (retuning) + radio frequency (RF) reruning takes 1~2ms.

[0082] For LTM technology, when the terminal device performs cell switching, it must first switch the PCell, and does not support the scenario of switching only the SCell. The current Scell ​​switching requires an L3 signaling process, which includes RRC re-configuration signaling, SCell activation, RRC completion signaling, etc., with a delay of about 50ms. Therefore, LTM technology cannot fully and dynamically utilize downlink spectrum resources.

[0083] In another example, Figure 5 FIG. 1 is a schematic diagram of uplink carrier switching based on UL Tx switching. Figure 5 In the UL Tx switching technology, the network configures and activates multiple uplink service cells for the terminal device, and the number of activated uplink service cells is greater than or equal to the number of Txs of the terminal device. The UL Tx switching technology uses layer 1 scheduling to indicate the switching of Txs on different carriers, thereby enabling the terminal device to use a limited number of Txs to dynamically switch between multiple carriers, with an interruption time of about several hundred microseconds. Figure 5 In the figure, a square represents a time slot, U represents an uplink and downlink time slot, S represents a special time slot, and D represents a downlink time slot.

[0084] The R18 UL Tx switching technology is essentially designed to solve the problem of limited uplink Tx of terminals, and does not yet support downlink carrier switching when the downlink baseband processing capability is limited.

[0085] In view of this, an embodiment of the present application provides a communication method, which ensures that the terminal device can flexibly use carrier resources with limited capabilities when the number of secondary cells configured by the network device for the terminal device exceeds the number of cells supported by the carrier aggregation capability of the terminal device, thereby improving the user experience.

[0086] In order to facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0087] 1. In the embodiment of the present application, the 3rd generation partnership project (3GPP) network may include an operator network, wherein the 3GPP network may include one or more operator networks.

[0088] 2. In the embodiments of the present application, "network element" and "node" may be logical entities or physical entities. In other words, in the embodiments of the present application, "device" may be replaced with "network element", which is explained here uniformly and will not be repeated below.

[0089] 3. In the embodiments of the present application, for the convenience of description, when numbering or indexing is involved, the numbering can be started from 1 or from 0, or from any parameter.

[0090] 4. "Pre-definition", "pre-configuration", or "protocol agreement" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (e.g., a network device, a terminal device). The embodiments of this application do not limit the specific implementation method. Among them, "saving" can mean saving in one or more memories.

[0091] 5. The “protocol” involved in the embodiments of the present application may refer to a standard protocol in the field of communications, such as the long term evolution (LTE) protocol, the new radio (NR) protocol, and related protocols used in future communication systems (such as 6G communication systems), which are not limited in the embodiments of the present application.

[0092] 6. In the embodiments of the present application, descriptions such as “when…”, “in the case of…”, “if” and “if” all mean that the device will make corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0093] 7. In the embodiments of the present application, “sending information to...(terminal device)” can be understood as the destination of the information being the terminal device, and can include directly or indirectly sending information to the terminal device. “Receiving information from...(network device)” or “receiving information from...(network device)” can be understood as the source of the information being the network device, and can include directly or indirectly receiving information from the network device. The information may be processed as necessary between the source and destination of the information transmission, such as format changes, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly and will not be repeated here.

[0094] 8. In the description of the embodiments of the present application, unless otherwise specified, the "and / or" in the embodiments of the present application indicates that there may be three relationships, for example, A and / or B, which may indicate: A exists alone, A and B exist at the same time, and B exists alone, wherein A and B may be singular or plural. Moreover, "at least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single items or plural items. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art may understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit the certain difference. At the same time, in the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions.

[0095] The embodiments of the present application may be applicable to LTE systems or NR systems (also referred to as fifth generation (5th generation, 5G) systems), systems with hybrid networking of LTE and NR, vehicle to everything (V2X) systems, device-to-device (D2D) systems, machine to machine (M2M) communication systems, Internet of Things (IoT) systems (such as narrowband Internet of Things (NB-IoT) systems), 6G systems and other systems evolved after 5G, as well as other next generation communication systems. Alternatively, the communication system may also be an open radio access network (O-RAN or ORAN), a cloud radio access network (cloud RAN, CRAN), or a wireless fidelity (Wi-Fi) system, without limitation.

[0096] In addition, the communication architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of the communication architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0097] Figure 6 FIG. 1 is a simplified schematic diagram of a communication system provided by an embodiment of the present application. Figure 6As shown, the communication system may include: a network device and a terminal device. The terminal device is communicatively connected with the network device.

[0098] Figure 6 The network device in the LTE system is a device deployed in a wireless access network to provide wireless communication functions for terminal devices. That is, the network device can be used to communicate with the terminal device, for example, it can include an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in an LTE system or an enhanced LTE (LTE-advanced, LTE-A) system, such as a traditional macro base station eNB and a micro base station eNB in ​​a heterogeneous network scenario. Or, it can include a next generation node B (next generation node B, gNB) in an NR system. Or, it can include a transmission reception point (TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU), a base band pool (BBU pool), or a wireless fidelity (WiFi) access point (access point, AP), etc. Alternatively, it may include a base station in a non-terrestrial network (NTN), that is, it may be deployed on a flying platform or a satellite. In the NTN, the network device may be used as a layer 1 (L1) relay, or as a base station, or as an integrated access and backhaul (IAB) node. Alternatively, the network device may be a device that implements the base station function in IoT, such as a device that implements the base station function in drone communications, V2X, D2D, or machine to machine (M2M).

[0099] In some possible scenarios, the network device may also be a module or unit that can implement some functions of the base station, for example, the network device may be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be separately configured, or may be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0100] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, the network device may be a network device or a module of a network device in an open radio access network (open RAN, ORAN) system. In the ORAN system, CU may also be referred to as open (open, O)-CU, DU may also be referred to as O-DU, CU-CP may also be referred to as O-CU-CP, CU-UP may also be referred to as O-CU-UP, and RU may also be referred to as O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0101] Optionally, the base station in the embodiment of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, home base stations, TRPs, transmitting points (TP), mobile switching centers, etc., and the embodiments of the present application do not make specific limitations on this.

[0102] In the embodiments of the present application, the form of the network device is not limited. The device for realizing the function of the network device can be the network device; or it can be a device that can support the network device to realize the function, such as a chip system. The device can be installed in the network device or used in combination with the network device.

[0103] The terminal equipment involved in the embodiments of the present application can be a user equipment (UE), an access terminal, a terminal unit, a user station, a terminal station, a mobile station, a mobile station, a mobile station, a remote station, a remote terminal, a user terminal terminal equipment, a mobile device, a wireless communication device, a terminal agent, a tablet computer (pad), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a vehicle-mounted transceiver unit, a wearable device, or a terminal device. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a drone, a robot, a smart point of sale (point of The terminal device may be a point-of-sale (POS) machine, a customer-premises equipment (CPE) or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Alternatively, the terminal device may be a terminal with a communication function in the Internet of Things (IoT), such as a terminal in V2X (such as a vehicle networking device), a terminal in D2D communication, or a terminal in M2M communication, etc. The terminal device may be mobile or fixed.

[0104] The embodiments of the present application do not limit the form of the terminal device. The device for realizing the function of the terminal device can be the terminal device; it can also be a device that can support the terminal device to realize the function, such as a chip system. The device can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0105] It should be noted that Figure 6 For exemplary drawings, Figure 6 The number of devices shown, Figure 6 There is no restriction on the naming of interfaces between devices. Figure 6 In addition to the network elements shown, Figure 6 The communication system shown may also include other devices, such as core network devices, etc., without limitation.

[0106] When implementing it specifically, Figure 6 The equipment in Figure 7 The structure shown, or including Figure 7 Parts shown. Figure 7 The present invention provides a schematic diagram of the composition of a communication device 700, which can be a master device or a chip or system on chip in a master device. Alternatively, the communication device 700 can be a slave device or a chip or system on chip in a slave device. Figure 7 As shown, the communication device 700 includes a processor 701 , a communication interface 702 and a communication line 703 .

[0107] Furthermore, the communication device 700 may further include a memory 704 . The processor 701 , the memory 704 and the communication interface 702 may be connected via a communication line 703 .

[0108] The processor 701 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 701 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0109] The communication interface 702 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. The communication interface 702 may be a module, a circuit, a communication interface or any device capable of implementing communication.

[0110] The communication line 703 is used to transmit information between the components included in the communication device 700.

[0111] The memory 704 is used to store instructions, where the instructions may be computer programs.

[0112] Among them, the memory 704 can be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage medium or other magnetic storage devices, etc., without limitation.

[0113] It should be noted that the memory 704 can exist independently of the processor 701, or can be integrated with the processor 701. The memory 704 can be used to store instructions or program codes or some data, etc. The memory 704 can be located in the communication device 700, or can be located outside the communication device 700, without limitation. The processor 701 is used to execute the instructions stored in the memory 704 to implement the data transmission method applied to short-range wireless communication provided in the following embodiments of the present application.

[0114] In one example, the processor 701 may include one or more CPUs, such as Figure 7 CPU0 and CPU1 in.

[0115] As an optional implementation, the communication device 700 includes multiple processors, for example, Figure 7 In addition to the processor 701, a processor 707 may also be included.

[0116] As an optional implementation, the communication device 700 further includes an output device 705 and an input device 706. Exemplarily, the input device 706 is a keyboard, a mouse, a microphone, a joystick, and the like, and the output device 705 is a display screen, a speaker, and the like.

[0117] It should be noted that the communication device 700 can be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a Figure 7 In addition, Figure 7 The structure shown in the figure does not constitute a limitation on network devices and terminal devices, except Figure 7 In addition to the components shown, the network devices and terminal devices may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0118] In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0119] In addition, the actions, terms, etc. involved in the various embodiments of the present application can refer to each other without limitation. The names of the information exchanged between the various devices in the embodiments of the present application or the names of the parameters in the information are only examples, and other names can also be used in the specific implementation without limitation.

[0120] The following will be combined Figure 6 , the communication method provided in the embodiment of the present application is described in detail.

[0121] It should be understood that the information names between the various devices or the names of the various parameters in the information in the following embodiments of the present application are only examples, and other names may be used in specific implementations, and the embodiments of the present application do not specifically limit this.

[0122] like Figure 8 As shown, a communication method provided in an embodiment of the present application includes the following steps:

[0123] S801: The network device sends instruction information to the terminal device. Correspondingly, the terminal device receives the instruction information from the network device.

[0124] Among them, the indication information can be used to indicate the activation of multiple secondary cells. For example, the indication information can be used to indicate the activation of K secondary cells. K is a positive integer. For example, the indication information may include the identification / numbering / coding of the K secondary cells. For example, the indication information may include the identification document (ID) of each secondary cell. K+S is greater than N-1, S represents the number of secondary cells activated by the terminal device, and N represents the maximum number of cells supported by the carrier aggregation capability of the terminal device; K and N are positive integers, and S is an integer greater than or equal to 0.

[0125] Optionally, the indication information is transmitted on the PCell.

[0126] It can be understood that the maximum number of cells supported by the carrier aggregation capability of the terminal device includes PCell.

[0127] Since K+S is greater than N-1, that is, K+S+1 is greater than N, it indicates that the number of cells to be activated (including the already activated PCell) is greater than the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0128] In some examples, the indication information may be a separate signaling, or may be carried in other information, for example, may be carried in a MAC CE, without limitation.

[0129] Optionally, the indication information is carried in downlink control information (DCI) transmitted by a physical downlink control channel (PDCCH).

[0130] In a possible implementation, the network device may determine the value of K based on the maximum number of cells supported by the carrier aggregation capability of the terminal device. The maximum number of cells supported by the carrier aggregation capability of the terminal device may be pre-configured by the network device, or may be obtained by the network device from other devices, such as from other network devices that are in communication connection with the terminal device, or from a core network device, or through interaction with the terminal device.

[0131] In one example, when accessing a network device, the terminal device may actively send the network device the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0132] In another example, after receiving the request information from the network device, the terminal device may send the maximum number of cells supported by the carrier aggregation capability of the terminal device to the network device, wherein the request information is used to request the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0133] In a possible application scenario, when the terminal device needs to send data of a high-speed service or the network device needs to send a certain number of high-speed services to the terminal device, because the secondary cell currently activated by the terminal device cannot meet the transmission requirements of the high-speed service data, or the channel state of the currently activated secondary cell deteriorates, the network device can select the best carrier for transmitting PDSCH according to the service volume or channel state conditions, which is conducive to load balancing, thereby improving the user experience rate. Therefore, the network device can send indication information to the terminal device to indicate the activation of K secondary cells.

[0134] In one example, when a terminal device needs to transmit data of a high-speed service, it can send a notification message to the network device to notify that the data of the high-speed service needs to be transmitted, such as sending a scheduling request (SR) or a buffer state report (BSR). In response to the notification message, the network device can send indication information to the terminal device.

[0135] In another example, when the network device determines that it needs to send high-speed service data to the terminal device, for example, other terminal devices send a request message to the network device for requesting to transmit high-speed service data to the terminal device. In response to the request message, the network device can send indication information to the terminal device.

[0136] S802. The terminal device activates multiple secondary cells.

[0137] Among them, the implementation method of activating the secondary cell by the terminal device can refer to the existing technology and will not be described in detail. One or more secondary cells in the activated secondary cell are in the first activated BWP (first active BWP). For example, the indication information indicates the activation of K secondary cells. After activating the K secondary cells, the terminal device can set the BWP of one or more secondary cells in the K secondary cells to the first activated BWP. The number of the one or more secondary cells is less than or equal to the difference between the maximum number of cells supported by the carrier aggregation capability of the terminal device and 1. 1 refers to the primary cell (PCell) of the terminal device. For example, if the maximum cell data supported by the carrier aggregation capability of the terminal device is N, then the number of the one or more secondary cells is less than or equal to N-1. N is a positive integer.

[0138] In the embodiment of the present application, the first activated BWP of the secondary cell may include the first activated downlink BWP and / or the first activated uplink BWP. The terminal device may determine the corresponding first activated BWP according to the configuration information of the secondary cell. For example, the configuration information of a secondary cell may include information of multiple BWPs configured in the secondary cell (such as ID, cell number, frequency, etc.), as well as the ID corresponding to the first activated downlink BWP and the ID corresponding to the first activated uplink BWP. In this way, the terminal device can determine the first activated downlink BWP and the first activated uplink BWP of the secondary cell according to the ID of the BWP in the secondary cell.

[0139] Optionally, a secondary cell may include a downlink and an uplink, or only a downlink (for example, a terminal device only receives downlink data in the secondary cell), or only an uplink (for example, a terminal device only sends uplink data in the secondary cell).

[0140] In a possible scenario, the terminal device has an activated secondary cell before receiving the indication information. The terminal device may switch the BWP of the activated secondary cell to a special dormant BWP to release the N-1 carrier aggregation capability of the terminal device.

[0141] In one example, the terminal device has S activated secondary cells, where S is greater than 0. The terminal device can switch the BWP of one or more of the S activated secondary cells to a special dormant BWP. For example, switch S1 of the S to a special dormant BWP, where S-S1+K=N-1. S1 is an integer greater than or equal to 0. In this way, the terminal device can release part of the carrier aggregation capability, and after activating K secondary cells, the number of all activated secondary cells is equal to N-1.

[0142] Optionally, S1 secondary cells may be selected from S cells according to a preset order of cell numbers and switched to the special dormant BWP.

[0143] Optionally, the preset order of cell numbers may be predefined by a standard or configured by a network device.

[0144] Optionally, the network device can configure a cell set. If the secondary cells in the cell set have been activated and the BWP is not a special dormant BWP, the BWP of the secondary cells in the cell set remains unchanged and does not switch to the special dormant BWP. The BWP of the secondary cells not in the cell set can be switched to the special dormant BWP. In this way, certain secondary cells are always activated to ensure data transmission of terminal devices and to ensure the data transmission rate.

[0145] Optionally, the network device can configure a cell set. If the secondary cells in the cell set are activated and the BWP is not a special dormant BWP, the BWP of the secondary cells in the cell set is switched to the special dormant BWP, and the secondary cells not in the cell set are not switched to the special dormant BWP. In this way, the network device can clearly identify which secondary cells can be switched to the special dormant BWP, thereby releasing the carrier aggregation capability of the terminal device.

[0146] Optionally, S1 is equal to 0, that is, the terminal device switches all the S activated secondary cells to the special dormant BWP.

[0147] In an embodiment of the present application, the special dormant BWP may be referred to as a special BWP, a special inactive BWP or other names. The special dormant BWP may be one of multiple BWPs configured for the secondary cell. The special dormant BWP does not occupy / consume the maximum number of cells supported by the carrier aggregation capability of the terminal device, or, on the special dormant BWP, the terminal device does not receive and / or parse channel information, for example, does not receive and / or parse PDSCH and other information. Alternatively, on the special dormant BWP, the terminal device does not monitor DCI, etc. Alternatively, on the special dormant BWP, the terminal device does not send uplink information, etc. Alternatively, the cell of the special dormant BWP does not limit the maximum number of cells that the terminal device can receive / send in parallel. That is, when calculating the number of secondary cells simultaneously activated by the terminal device based on the carrier aggregation capability of the terminal device, the secondary cell switched to the special dormant BWP is not calculated. Subsequent special dormant BWPs can refer to the description here and will not be repeated.

[0148] It can be understood that if the terminal device has an activated secondary cell before receiving the indication information, it is assumed that the BWP currently used (currently activated) by the activated secondary cell is not a special dormant BWP.

[0149] In another possible implementation, before receiving the indication information, the terminal device has no activated secondary cell. The terminal device activates the K secondary cells. One or more of the activated K secondary cells are in the first activated BWP.

[0150] In one scenario, when the number of multiple secondary cells indicated by the indication information exceeds the number of secondary cells supported by the terminal device, that is, K is greater than N-1, the terminal device can activate the multiple secondary cells through multiple rounds. The number of secondary cells that can be activated by the terminal device in each round can be less than or equal to N-1. After activation, the multiple secondary cells are in a special dormant BWP. For the remaining unactivated secondary cells among the K secondary cells, the terminal device can continue to activate, and the remaining unactivated secondary cells are in the first activation BWP after activation.

[0151] The secondary cells activated in each round are selected according to a preset order of the cell numbers of the secondary cells, and the secondary cells activated in each round are in a special dormant BWP after activation, and the secondary cells activated in the last round are in a first activated BWP after activation.

[0152] Optionally, the preset order may be in the order of the cell numbers from small to large, or from large to small.

[0153] Optionally, the preset order may be configured by the network device.

[0154] In one example, taking the indication of activating K secondary cells, where K is greater than or equal to N, as an example, the terminal device can activate L secondary cells among the K secondary cells, and the L secondary cells are in a special dormant BWP after activation. Wherein, L is an integer multiple of N-1. For example, if N=3, then L can be 2, 4, 6, 8, etc. In the case where the terminal device activates N-1 secondary cells in each round, the terminal device can activate the L secondary cells through P rounds. P*(N-1)=L. P is a positive integer. For the remaining KL secondary cells, the terminal device can continue to activate, and the KL secondary cells are in the first activated BWP after activation. For example, the indication information indicates the activation of 3 secondary cells, and the maximum number of cells supported by the carrier aggregation capability of the terminal device is 3, then the terminal device can activate up to 2 secondary cells per round. The terminal device can activate 2 secondary cells in one round, and set the BWP of the two activated secondary cells to a special dormant BWP. After one round of activation, there is still one secondary cell that has not been activated. The terminal device can continue to activate the remaining secondary cell and set the BWP after the activation of the remaining secondary cell as the first activated BWP.

[0155] like Fig. 9 As shown, taking the maximum number of cells supported by the carrier aggregation capability of the terminal device as 3, and the indication information indicating that the number of activated secondary cells is 3 as an example, the terminal device has activated secondary cells cell1 and cell2, and the indication information indicates the activation of cell3~cell5. After receiving the indication information, the terminal device can switch the BWP of cell1 and cell2 to the special dormant BWP. According to the order of cell numbers from small to large, the terminal device can first activate cell3 and cell4. The terminal device can activate cell3 and cell4, and the activated cell3 and cell4 are in a special dormant BWP. After activating cell3 and cell4, since cell1~cell4 are all in a special dormant BWP. Therefore, the carrier aggregation capability of the terminal device can also support the terminal device to continue to activate secondary cells. Therefore, the terminal device can continue to activate cell5, and the activated cell5 is in the first activated BWP. So far, all the secondary cells configured by the terminal device have been activated.

[0156] In one example, when K is greater than or equal to N, the terminal device needs multiple rounds to complete the activation of K secondary cells. In the last round of the above P rounds of activation, that is, the Pth round of activation, if the number A of the remaining unactivated secondary cells is less than 2*(N-1), then only A%(N-1) secondary cells are activated in the Pth round of activation, where % represents the remainder operation. In this way, after completing the P rounds of activation, the number of remaining unactivated secondary cells is guaranteed to be N-1. In this way, after the last round (i.e., the P+1th round) of activation, the number of activated secondary cells (secondary cells in the first activation BWP) is N-1, which can maximize the use of the carrier aggregation capability of the terminal device to improve the data transmission rate.

[0157] In another scenario, when the number of the multiple secondary cells indicated by the indication information does not exceed the number of the secondary cells supported by the terminal device, that is, K is less than N-1, since the number of secondary cells that need to be activated is within the capability of the terminal device, the terminal device can directly activate the multiple secondary cells. For example, the terminal device can activate the multiple secondary cells synchronously to reduce the activation delay. For another example, the terminal device can activate the multiple secondary cells in sequence to reduce the processing pressure of the terminal device. For example, the terminal device can activate the multiple secondary cells in ascending or descending order according to the identification number of the secondary cell.

[0158] It can be understood that in order to preferentially activate multiple secondary cells indicated by the indication information, before receiving the indication information, the terminal device has an activated secondary cell. The terminal device can switch the BWP of the activated secondary cell to a special dormant BWP to ensure that the terminal device has sufficient capacity to activate the multiple secondary cells.

[0159] Further, in combination with the above example, after P rounds of activation, when the number of remaining unactivated secondary cells X is less than N-1, after the X secondary cells are activated, the X secondary cells are in the first activation BWP. At this time, the number of secondary cells in the activation BWP is less than N-1, which does not reach the maximum number of cells supported by the carrier aggregation capability of the terminal device. In this case, the terminal device can select R secondary cells from the secondary cells in the special dormant BWP, and switch the BWP of the R secondary cells from the special dormant BWP to the first activation BWP. Where R = N-1-X.

[0160] For example, by Fig. 9 It can be seen that after the terminal device activates all the secondary cells configured for the terminal, the number of secondary cells in the first activated BWP is 1, plus the activated PCell, which is less than the maximum number of cells 3 supported by the carrier capability of the terminal device, wasting the link resources and capabilities of the terminal device.

[0161] Furthermore, in order to improve the utilization rate of link resources of the terminal device, when the number of secondary cells in the first activated BWP is less than N-1, the terminal device can select R secondary cells from the secondary cells located in the special dormant BWP, and switch the BWP of the R secondary cells from the special dormant BWP to the first activated BWP.

[0162] It can be understood that the secondary cells in special dormant BWP include: the secondary cells that have been activated before receiving the indication information and have switched BWP to the special dormant BWP, and the secondary cells in the K secondary cells that have been activated in the previous P rounds and are in special dormant BWP.

[0163] In an embodiment of the present application, the R secondary cells may be specified by the protocol, configured by the network device for the terminal device, or indicated by the network device to the terminal device through information. For example, the R secondary cells may be configured by the network device for the terminal device through RRC, or indicated to the terminal device through MAC CE. For another example, the PDSCH carrying the indication information for activating K secondary cells may also carry selection rules, which may be used to select R secondary cells from the secondary cells in the special dormant BWP. For example, the selection rule may include selecting secondary cells according to the cell number of the cell from large to small, or selecting secondary cells according to the cell number from small to large. Of course, the selection rule may also include other rules, such as selecting secondary cells according to the channel quality of the secondary cells from high to low, without limitation. In an embodiment of the present application, the selection rule may be carried in the PDSCH in the form of a cell number list.

[0164] In some examples, the R secondary cells are selected according to a preset order of cell numbers of the secondary cells. For example, the R secondary cells are secondary cells with larger cell numbers among the secondary cells in the special dormant BWP.

[0165] The preset order may be predefined by the standard or configured by the network device. Or it may be a preset order that is opposite to the preset order selected when the K secondary cells are activated. For example, when the K secondary cells are activated, the secondary cells are selected in P rounds in the order of the cell numbers from small to large. Then, when selecting the R secondary cells, the R secondary cells are selected from the secondary cells in the special dormant BWP in the order of the cell numbers from large to small.

[0166] For example, the number of secondary cells in the special dormant BWP is 5, X=1, N=3, then R=3-1-1=1. That is, the terminal device can select one secondary cell from the 5 secondary cells in the special dormant BWP and switch from the special dormant BWP to the first activated BWP. The one secondary cell can be the secondary cell with the largest cell number among the 5 secondary cells.

[0167] For another example, the number of secondary cells in the special dormant BWP is 5, X=1, N=4, then R=4-1-1=2. That is, the terminal device can select 2 secondary cells from the 5 secondary cells in the special dormant BWP to switch from the special dormant BWP to the first activated BWP. The 2 secondary cells can be the 2 secondary cells with larger cell numbers among the 5 secondary cells.

[0168] In one example, combining the above Fig. 9 ,like Fig.10 As shown, in the secondary cells cell1 to cell5 configured for the terminal device on the network side, the BWP of cell1 to cell4 is a special dormant BWP, and the BWP of cell5 is the first activated BWP. The terminal device can select R=N-1-X=3-1-1=1 secondary cell (that is, cell4) according to the cell number from large to small, and switch the BWP of the secondary cell (cell4) from the special dormant BWP to the first activated BWP. At this time, multiple secondary cells configured by the terminal device have been activated, and the BWP of two secondary cells (cell4 and cell5) are located in the first activated BWP and the BWP of the main cell of the terminal device is in the activated BWP, which is consistent with the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0169] based on Figure 6 In the technical solution, since the number of secondary cells indicated to be activated and the number of secondary cells activated by the terminal device plus the number of primary service cells of the terminal device (that is, 1) exceeds the maximum number of cells supported by the carrier aggregation capability of the terminal device, at this time, the terminal device can activate the K secondary cells, and the BWP of one or more secondary cells in the K secondary cells after activation is in the first activated BWP. The number of one or more secondary cells is less than or equal to the difference between the number of cells supported by the carrier aggregation capability of the terminal device and 1. In this way, when the terminal device activates the K secondary cells, the number of secondary cells in the activated BWP can also meet the number of cells supported by the carrier aggregation capability of the terminal device, thereby ensuring normal data transmission of the terminal device.

[0170] In some embodiments, the method provided in the embodiments of the present application may further include: the terminal device transmits data through the activated secondary cell.

[0171] The activated secondary cell may refer to a secondary cell whose BWP is in the first activated BWP. It can be understood that since the activated secondary cell is in the first activated BWP, the terminal device can transmit data on the secondary cell in the first activated BWP. For example, data sent by the network device can be received, or data can be sent to the network device, etc., ensuring the normal transmission of data between the terminal device and the network device.

[0172] In some embodiments, after sending the indication information, the network device may configure the multiple secondary cells indicated by the indication information as the first activated BWP. Alternatively, after receiving the activation response from the terminal device, the network device may set the BWP of K secondary cells as the first activated BWP according to the activation response. When the activation response indicates that the secondary cell is in a special dormant BWP, the network device may set the BWP of the secondary cell to a special dormant BWP to maintain consistency with the terminal device.

[0173] In some embodiments, in order to ensure that the terminal device can complete the activation of the secondary cell in a timely manner, in the embodiments of the present application, the activation delay for the terminal device to activate K secondary cells is specified.

[0174] Among them, the activation delay can be in the protocol, can be configured by the network device for the terminal device, or can be indicated by the network device. For example, it can be included in the indication information, or it can be indicated by the network device through separate signaling, without limitation.

[0175] Among them, the activation delay of the K secondary cells is related to the HARQ delay, the BWP switching delay, the cell activation delay, and the CSI reporting delay. The BWP switching delay may refer to the BWP switching delay of the secondary cell. For example, the BWP switching delay may include the switching delay of the BWP of the secondary cell switching to the special dormant BWP, the switching delay of the BWP of the secondary cell switching to the first activated BWP, and the switching delay of the BWP of the secondary cell switching from the special dormant BWP to the first activated BWP. The activation delay of the above secondary cell is described below in conjunction with specific scenarios.

[0176] In one possible scenario, K is less than N-1, that is, the indication information indicates that the number of activated secondary cells does not exceed the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0177] In one example, if the terminal device has an activated secondary cell, the BWP switching delay may refer to the maximum delay for switching the BWP of the activated secondary cell from an activated BWP to a special dormant BWP.

[0178] For example, the activation delay T of K secondary cells is less than or equal to T1. T1 may be:

[0179] T1=T HARQ +T BWP_switch +T activation_time_multiple_scells +T CSI_reporting .

[0180] Among them, T BWP_switch It can represent the switching delay of the BWP of the secondary cell from the activated BWP to the special dormant BWP. Other parameters can refer to the above formula 1 and will not be described in detail.

[0181] Further, in combination with the above formula 1, the time slot n1 at which the terminal device completes the activation of the secondary cell at the latest can be as shown in formula 2.

[0182]

[0183] That is, the terminal device completes the activation of K secondary cells before T1 at the latest.

[0184] Optionally, the above BWP switching delay (T BWP_switch ) can be the maximum BWP switching delay configured by the network device, or the BWP switching delay supported by the terminal device, or the BWP switching delay corresponding to the minimum subcarrier spacing (SCS) of the terminal device. Optionally, it can be the maximum BWP switching delay of S activated secondary cells switching the BWP to the special dormant BWP (assuming that the BWP switching delays of different secondary cells are different).

[0185] In another example, if the terminal device does not have an activated secondary cell before activating K secondary cells, then T in the above T1 is BWP_switch =0.

[0186] In another possible scenario, K is greater than N, that is, the indication information indicates that the number of activated secondary cells exceeds the maximum number of cells supported by the carrier aggregation capability of the terminal device.

[0187] It can be understood that when the number of K secondary cells indicated by the indication information exceeds the number of cells supported by the terminal device, the terminal device needs to activate the K secondary cells in multiple rounds. Therefore, the activation delay is also extended accordingly. In combination with the previous embodiment, the extended activation delay T is related to the HAQR delay, BWP switching delay, cell activation delay, CSI reporting delay, and K and N.

[0188] For example, the activation delay T may be less than or equal to T2. T2 may be:

[0189]

[0190] Among them, M1 and M2 can be related to K and N.

[0191] In one example, before the terminal device receives the indication information, if there is no activated secondary cell, M1=ceil(K / (N-1))-1, M2=ceil(K / (N-1)). Wherein, ceil(x) represents the smallest integer greater than or equal to x, and / represents a division operation. For example, K=3, N=3, then if the terminal device does not have an activated secondary cell, M1=ceil(3 / 2)-1=1, M2=ceil(3 / 2)=2. If the terminal device has an activated secondary cell, M1=ceil(3 / 2)=2.

[0192] In the above T2, it is equivalent to including M1 BWP switching delays. For example, if the terminal device has an activated secondary cell before activating K secondary cells, it is necessary to switch the BWP of the activated secondary cell to a special dormant BWP, which corresponds to one BWP switching delay. If the terminal device needs multiple rounds to complete the switching of K secondary cells, for example, K=3, N=3, the terminal device needs 2 rounds to complete the activation of 3 secondary cells. The first round completes the activation of 2 secondary cells. After activation, the BWP is first set to the first activated BWP, and then the first activated BWP is switched to the special dormant BWP, which corresponds to one BWP switching delay. Then the second round completes the activation of the remaining 1 secondary cell, and after activation, the BWP is set to the first activated BWP, so that the activation of 3 secondary cells is completed. It can be seen that in this case, M1 is equal to 2, and T2 includes 2 BWP switching delays. If the terminal device does not have an activated secondary cell before activating K secondary cells, M1 is equal to 1, and T2 only includes one BWP switching delay.

[0193] Optionally, after each round of secondary cell activation, the terminal device can directly set the BWP of the secondary cell to a special dormant BWP, and only after the last round of secondary cell activation, set the BWP of the secondary cell to the first activated BWP. In this way, in the above T2, M1 has only two values, 1 or 0. When the terminal device has an activated secondary cell before activating K secondary cells, it is necessary to switch the BWP of the activated secondary cell to a special dormant BWP. At this time, M1=1. In the process of activating K secondary cells, it is no longer necessary to perform BWP switching. If the terminal device does not have an activated secondary cell before activating K secondary cells, M1 is equal to 0.

[0194] Based on this scenario, the terminal device can complete the activation of multiple secondary cells in a timely manner according to the activation delay.

[0195] In another possible scenario, when the terminal device needs to select N-1-X secondary cells from the secondary cells located in the special dormant BWP, and switch the BWP of the N-1-X secondary cells from the special dormant BWP to other BWPs, for example, it can switch to the first activated BWP. The activation delay of K secondary cells may also need to be extended. The extended activation delay T is related to the HAQR delay, BWP switching delay, cell activation delay, CSI reporting delay, and K and N.

[0196] For example, the activation delay T may be less than or equal to T3. T3 may be:

[0197]

[0198] Among them, M1 and M2 can refer to the description of M1 and M2 in the previous embodiment, and will not be repeated here. M3 is related to K and N. For example, when K is a multiple of N-1, that is, when K%(N-1)=0, M3=0. When K is not a multiple of N-1, when K%(N-1)≠0, that is, M3=1. % represents the remainder operation.

[0199] Based on this scenario, when the terminal device needs to activate multiple secondary cells through multiple activation cycles (i.e., multiple rounds), in order to fully utilize the capabilities of the terminal device, the activation delay of the terminal device can be extended to ensure that the terminal device can activate multiple secondary cells.

[0200] It can be understood that the multiples of N-1 mentioned above represent multiples of (N-1), rather than N minus (multiples of 1).

[0201] The various solutions in the above embodiments of the present application can be combined without contradiction.

[0202] The actions of the terminal device in steps S801 to S802 can be performed by Figure 7 The processor 701 in the communication device 700 shown in the figure calls the application code stored in the memory 703 to instruct the communication device 700 to execute. The actions of the network device in the above steps S801 to S802 can be performed by Figure 7 The processor 701 in the communication device 700 shown calls the application code stored in the memory 703 to instruct the communication device 700 to execute, and the embodiment of the present application does not impose any limitation on this.

[0203] The above mainly introduces the scheme provided by the embodiment of the present application from the perspective of interaction between various network elements. Accordingly, the embodiment of the present application also provides a communication device, which is used to implement the above various methods. The communication device can be a terminal device in the above method embodiment, or a component that can be used for a terminal device; or, the communication device can be a network device in the above method embodiment, or a component that can be used for a network device. It can be understood that in order to implement the above functions, the communication device includes a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0204] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be understood that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0205] For example, taking the communication device as the terminal device in the above method embodiment, Fig.11 The schematic diagram of the structure of a terminal device 1100 is shown. The terminal device 1100 includes a transceiver module 1101 and a processing module 1102. The transceiver module 1101, which may also be called a transceiver unit, is used to implement a transceiver function, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0206] The transceiver module 1101 is used to receive indication information indicating activation of K secondary cells. K+S is greater than N-1. S represents the number of secondary cells activated by the terminal device, and N represents the maximum number of cells supported by the carrier aggregation capability of the terminal device. The processing module 1102 is used to activate K secondary cells, and one or more of the K secondary cells after activation are in the first activation BWP. The number of the one or more secondary cells is less than or equal to N-1.

[0207] Among them, the transceiver module 1101 can be used to implement the transceiver function corresponding to the terminal device in the above method embodiment, and the processing module 1102 can be used to implement the processing function corresponding to the terminal device in the above method embodiment. Furthermore, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0208] In the embodiment of the present application, the terminal device 1100 is presented in the form of dividing various functional modules in an integrated manner. The "module" here may refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the terminal device 1100 can be used Figure 7 The form of the communication device 700 is shown.

[0209] for example, Figure 7 The processor 701 in the communication device 700 shown can call the computer-executable instructions stored in the memory 703 to enable the communication device 700 to execute the communication method in the above method embodiment.

[0210] Specifically, Fig.11 The functions / implementation processes of the transceiver module 1101 and the processing module 1102 can be Figure 7 The processor 701 in the communication device 700 shown calls the computer execution instructions stored in the memory 703 to implement. Or, Fig.11 The function / implementation process of the processing module 1102 in Figure 7 The processor 701 in the communication device 700 shown calls the computer execution instructions stored in the memory 703 to implement, Fig.11 The function / implementation process of the transceiver module 1101 can be Figure 7 The communication interface 704 in the communication device 700 shown in FIG. 7 is implemented.

[0211] Since the terminal device 1100 provided in the embodiment of the present application can execute the above-mentioned communication method, the technical effects that can be obtained can be referred to the above-mentioned method embodiment and will not be repeated here.

[0212] Or, for example, taking the communication device as the network device in the above method embodiment as an example, Fig.12 The schematic diagram of the structure of a network device 1200 is shown. The network device 1200 includes a transceiver module 1201 and a processing module 1202. The transceiver module 1201, which may also be called a transceiver unit, is used to implement the transceiver function, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0213] The transceiver module 1201 is used to send indication information indicating activation of K secondary cells; and the processing module 1102 is used to activate K secondary cells.

[0214] Among them, the transceiver module 1201 can be used to implement the corresponding transceiver function of the network device in the above method embodiment, and the processing module 1202 can be used to implement the corresponding processing function of the network device in the above method embodiment. Furthermore, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0215] In the embodiment of the present application, the network device 1200 is presented in the form of dividing various functional modules in an integrated manner. The "module" here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the network device 1200 can be used Figure 7 The form of the communication device 700 is shown.

[0216] for example, Figure 7 The processor 701 in the communication device 700 shown can call the computer-executable instructions stored in the memory 703 to enable the communication device 700 to execute the communication method in the above method embodiment.

[0217] Specifically, Fig.12 The functions / implementation processes of the transceiver module 1201 and the processing module 1202 can be Figure 7 The processor 701 in the communication device 700 shown calls the computer execution instructions stored in the memory 703 to implement. Or, Fig.12 The function / implementation process of the processing module 1202 in can be Figure 7 The processor 701 in the communication device 700 shown calls the computer execution instructions stored in the memory 703 to implement, Fig.12 The function / implementation process of the transceiver module 1201 can be Figure 7 The communication interface 704 in the communication device 700 shown in FIG. 7 is implemented.

[0218] Since the network device 1200 provided in this embodiment can execute the above communication method, the technical effects that can be obtained can refer to the above method embodiments and will not be repeated here.

[0219] It should be understood that one or more of the above modules or units can be implemented by software, hardware or a combination of the two. When any of the above modules or units are implemented in software, the software exists in the form of computer program instructions and is stored in a memory, and the processor can be used to execute the program instructions and implement the above method flow. The processor can be built into an SoC (system on chip) or an ASIC, or it can be an independent semiconductor chip. In addition to the core used to execute software instructions for calculation or processing in the processor, it can also further include necessary hardware accelerators, such as field programmable gate arrays (FPGA), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

[0220] When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0221] Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), which includes a processor for implementing the method in any of the above method embodiments. In one possible design, the communication device also includes a memory. The memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the above method embodiments. Of course, the memory may not be in the communication device. When the communication device is a chip system, it may be composed of chips, or it may include chips and other discrete devices, which is not specifically limited in the embodiments of the present application.

[0222] In one possible implementation, an embodiment of the present application also provides a computer-readable storage medium, which stores a computer program or instruction. When the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any of the above method embodiments or any of its implementations.

[0223] In a possible implementation, an embodiment of the present application further provides a communication system, which includes the network device described in the above method embodiment and the terminal device described in the above method embodiment.

[0224] In a possible implementation, an embodiment of the present application further provides a communication method, which includes the method described in any of the above method embodiments or any of its implementations.

[0225] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, 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 loading and executing computer program instructions on a computer, the process or function according to 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 devices. 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, computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more servers that can be integrated with a medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state drive (SSD)).

[0226] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0227] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: Receive indication information, where the indication information is used to indicate activation of K secondary cells of a terminal device; K+S is greater than N-1, S represents the number of secondary cells activated by the terminal device, and N represents the maximum number of cells supported by the carrier aggregation capability of the terminal device; K and N are positive integers, and S is an integer greater than or equal to 0; The K secondary cells are activated, and one or more of the K secondary cells after activation are in a first activation bandwidth part BWP, and the number of the one or more secondary cells is less than or equal to N-1.

2. The method according to claim 1, characterized in that When K is less than N and S is greater than 0, before activating the K secondary cells, the method further includes: The BWPs of the S activated secondary cells are switched to special dormant BWPs; wherein the secondary cells where the special dormant BWPs are located do not occupy the maximum number of cells supported by the carrier aggregation capability of the terminal device.

3. The method according to claim 2, characterized in that The K secondary cells are in the first activation BWP after activation.

4. The method according to any one of claims 1 to 3, characterized in that: The activation delay of the K secondary cells is related to the hybrid automatic repeat request HARQ delay, the BWP switching delay, the cell activation delay and the channel state information CSI reporting delay.

5. The method according to claim 4, characterized in that The activation delay T of the K secondary cells is less than or equal to T1, and T1=THARQ+TBWP_switch+Tactivation_time_multiple_scells+TCSI_reporting; wherein THARQ represents the HARQ delay, Tactivation_time_multiple_scells represents the cell activation delay, TCSI_reporting represents the CSI reporting delay, and TBWP_switch represents the BWP switching delay.

6. The method according to claim 1, characterized in that In the case where K is greater than or equal to N, the method further includes: If S is greater than 0, switching the BWPs of the S activated secondary cells to special dormant BWPs; Activate L secondary cells among the K secondary cells, and the L secondary cells are in a special dormant BWP after being activated; L is an integer multiple of N-1, and L is less than K, and L+N-1 is greater than or equal to K; The remaining unactivated secondary cells in the K secondary cells are activated, and the activated X secondary cells are in the first activation BWP; wherein X represents the number of the remaining unactivated secondary cells in the K secondary cells, and X=KL.

7. The method according to claim 6, characterized in that The activating L secondary cells among the K secondary cells includes: The L secondary cells are activated through P rounds, the secondary cells activated in each round of the P rounds are selected according to a preset order of cell numbers of the secondary cells, N-1 secondary cells are activated in each round and the secondary cells activated in each round are in a special dormant BWP after activation, P*(N-1)=L, and P is a positive integer.

8. The method according to claim 6 or 7, characterized in that: In the case where X is less than N-1, the method further includes: The BWPs of R secondary cells in the secondary cells in the special dormant BWP are switched from the special dormant BWP to the first active BWP, where R=N-1-X.

9. The method according to claim 8, characterized in that The R secondary cells are the R secondary cells with the largest cell numbers among the secondary cells in the special dormant BWP.

10. The method according to any one of claims 6 to 9, characterized in that: The activation delay of the K secondary cells is related to the HARQ delay, the BWP switching delay, the cell activation delay and the CSI reporting delay, the K and the N.

11. The method according to claim 10, characterized in that The activation delay of the K secondary cells is less than or equal to T2, and T2=THARQ+TBWP_switch*M1+Tactivation_time_multiple_scells*M2+TCSI_reporting; wherein THARQ represents the HARQ delay, Tactivation_time_multiple_scells represents the cell activation delay, TCSI_reporting represents the CSI reporting delay, and TBWP_switch represents the BWP switching delay; M1 and M2 are respectively related to the K and the N.

12. The method according to claim 10, characterized in that The activation delay of the K secondary cells is less than or equal to T3, and T3=THARQ+TBWP_switch*(M1+1)+Tactivation_time_multiple_scells*M2+TCSI_reporting; wherein THARQ represents the HARQ delay, Tactivation_time_multiple_scells represents the cell activation delay, TCSI_reporting represents the CSI reporting delay, and TBWP_switch represents the BWP switching delay; M1 and M2 are respectively related to the K and the N.

13. The method according to claim 11 or 12, characterized in that: When S is 0, M1=ceil(K / (N-1))-1; when S is greater than 0, M1=ceil(K / (N-1)); wherein ceil(x) represents the smallest integer greater than or equal to x; M2=ceil(K / (N-1)).

14. A communication device, characterized in that: The communication device comprises: a processor and a communication interface coupled to the processor, The processor is configured to: Indication information is received through the communication interface, and the indication information is used to indicate the activation of K secondary cells of the terminal device; K+S is greater than N-1, S represents the number of secondary cells activated by the terminal device, and N represents the maximum number of cells supported by the carrier aggregation capability of the terminal device; K and N are positive integers, and S is an integer greater than or equal to 0.

15. A communication device, characterized in that: The communication device includes one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program codes or computer instructions; When one or more processors execute the computer instructions, the communication device is caused to perform the method according to any one of claims 1 to 13.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 13.

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