Carrier activation method and apparatus, and device and storage medium

Abstract

A carrier activation method and apparatus, a carrier receiving method and apparatus, and a device and a storage medium, which relate to the technical field of communications. The carrier activation method comprises: a network device sending on a first carrier an activation command to a terminal device, wherein the activation command is used for activating a second carrier; and the terminal device sending a CSI report regarding the second carrier, wherein a time unit for the terminal device to receive the activation command is a first time unit, a time unit for the terminal device to send the CSI report is not later than a second time unit, and the time interval between the first time unit and the second time unit is related to at least one of the following: the timing between a downlink data transmission and an ACK feedback, the period of time within which CSI reporting is processed, and the period of time within which the terminal device parses and executes the activation command. In the method, since AGC, time-domain synchronization and frequency-domain synchronization processes are omitted during carrier activation, unnecessary time spent on the above processes is saved on, and the delay of CSI reporting is shortened, thereby shortening the time for carrier activation.

Description

Carrier activation method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a carrier activation method, apparatus, device, and storage medium. Background Art

[0002] Carrier activation refers to enabling a specific carrier in the network so that terminal devices can use the carrier for data transmission and communication.

[0003] In the relevant technology, the carrier activation process may include two stages: parsing of the activation command and activation of the target carrier, wherein the target carrier refers to the carrier to be activated. In the parsing stage of the activation command, the terminal device receives the activation command for the target carrier sent by the network device and parses the activation command to ensure that the terminal device receives and understands the activation command so as to perform subsequent target carrier activation operations. In the activation stage of the target carrier, the terminal device needs to perform AGC (Automatic Gain Control), time domain synchronization, frequency domain synchronization and CSI (Channel State Information) reporting. Among them, CSI reporting refers to the terminal device reporting the CSI report for the target carrier to the network device.

[0004] The above method requires AGC, time domain synchronization, and frequency domain synchronization during the activation phase of the target carrier, which delays the CSI reporting time and thus prolongs the activation time of the target carrier.

[0005] Summary of the Invention

[0006] The present invention provides a carrier activation method, apparatus, device, and storage medium. The technical solution is as follows:

[0007] According to one aspect of an embodiment of the present application, a carrier activation method is provided, the method comprising:

[0008] The terminal device receives an activation command on the first carrier, where the activation command is used to activate the second carrier;

[0009] The terminal device sends a CSI report for the second carrier, wherein the time unit in which the terminal device receives the activation command is a first time unit, the time unit in which the terminal device sends the CSI report is no later than a second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following:

[0010] Timing between downlink data transmission and ACK (Acknowledgment) feedback;

[0011] Processing time for CSI reports;

[0012] The time when the terminal device parses and executes the activation command.

[0013] According to one aspect of an embodiment of the present application, a carrier activation method is provided, the method comprising:

[0014] The network device sends an activation command to the terminal device on the first carrier, where the activation command is used to activate the second carrier, and the activation command is received by the terminal device in a first time unit;

[0015] The network device receives a CSI report for the second carrier sent by the terminal device in a third time unit, where the third time unit is no later than the second time unit, and a time interval from the first time unit to the second time unit is related to at least one of the following:

[0016] Timing between downlink data transmission and ACK feedback;

[0017] Processing time for CSI reports;

[0018] The time when the terminal device parses and executes the activation command.

[0019] According to one aspect of an embodiment of the present application, a carrier activation device is provided, the device including:

[0020] A receiving module, configured to receive an activation command on the first carrier, where the activation command is used to activate the second carrier;

[0021] a sending module, configured to send a CSI report for the second carrier, wherein the time unit in which the terminal device receives the activation command is a first time unit, the time unit in which the terminal device sends the CSI report is no later than a second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following:

[0022] Timing between downlink data transmission and ACK feedback;

[0023] Processing time for CSI reports;

[0024] The time when the terminal device parses and executes the activation command.

[0025] According to one aspect of an embodiment of the present application, a carrier activation device is provided, the device including:

[0026] a sending module, configured to send an activation command to a terminal device on a first carrier, where the activation command is used to activate a second carrier, and the activation command is received by the terminal device in a first time unit;

[0027] a receiving module, configured to receive a CSI report for the second carrier sent by the terminal device in a third time unit, wherein the third time unit is no later than the second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following:

[0028] Timing between downlink data transmission and ACK feedback;

[0029] Processing time for CSI reports;

[0030] The time when the terminal device parses and executes the activation command.

[0031] According to one aspect of an embodiment of the present application, a communication device is provided, comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to implement the carrier activation method described above. The communication device is a terminal device, or the communication device is a network device.

[0032] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is configured to be executed by a processor to implement the above-mentioned carrier activation method.

[0033] According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the above-mentioned carrier activation method.

[0034] According to one aspect of an embodiment of the present application, a computer program product is provided, which includes computer instructions stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned carrier activation method.

[0035] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0036] Since during the carrier activation process, only one of the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command is considered, other unnecessary steps included in the carrier activation process, such as the time spent in AGC, time domain synchronization, and frequency domain synchronization steps, are avoided, the delay of CSI reporting is reduced, and the carrier activation time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0038] FIG2 is a flow chart of a carrier activation method provided in an embodiment of the present application;

[0039] FIG3 is a schematic diagram of an example of terminal carrier aggregation provided in an embodiment of the present application;

[0040] FIG4 is a schematic diagram of a carrier activation process provided by an embodiment of the present application;

[0041] FIG5 is a block diagram of a carrier activation apparatus provided by one embodiment of the present application;

[0042] FIG6 is a block diagram of a carrier activation device provided by another embodiment of the present application;

[0043] FIG7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

[0044] FIG8 is a schematic diagram of the structure of a network device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0046] The network 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 by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0047] Please refer to FIG1 , which shows a schematic diagram of a network architecture 100 provided by an embodiment of the present application. The network architecture 100 may include: a terminal device 10 , an access network device 20 , and a core network element 30 .

[0048] The terminal device 10 may refer to a UE (User Equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent, or a user apparatus. In some embodiments, the terminal device 10 may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5GS (5th Generation System) or a terminal device in a future-evolved PLMN (Public Land Mobile Network), etc., but the embodiments of the present application are not limited thereto. For ease of description, the devices mentioned above are collectively referred to as terminal devices. The number of terminal devices 10 is generally multiple, and one or more terminal devices 10 may be distributed in each cell managed by an access network device 20. The terminal device may also be referred to as a terminal or UE for short, and those skilled in the art may understand its meaning.

[0049] Access network equipment 20 is a device deployed in an access network to provide wireless communication capabilities for terminal devices 10. Access network equipment 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different wireless access technologies, the names of devices that provide access network equipment functions may vary. For example, in 5G NR systems, they are referred to as gNodeBs or gNBs. As communication technologies evolve, the term "access network equipment" may change. For ease of description, in the embodiments of this application, the aforementioned devices that provide wireless communication capabilities for terminal devices 10 are collectively referred to as access network equipment. In some embodiments, access network equipment 20 enables communication between terminal devices 10 and core network elements 30. For example, in an LTE (Long Term Evolution) system, access network equipment 20 may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN) or one or more eNodeBs within the EUTRAN. In a 5G NR system, access network equipment 20 may be a Radio Access Network (RAN) or one or more gNBs within the RAN. In the embodiment of the present application, unless otherwise specified, the "network device" refers to the access network device 20, such as a base station.

[0050] The core network element 30 is a network element deployed in the core network. The functions of the core network element 30 are mainly to provide user connection, user management, and service bearer, and to provide an interface to the external network as a bearer network. For example, the core network elements in the 5G NR system may include network elements such as the AMF (Access and Mobility Management Function) entity, the UPF (User Plane Function) entity, and the SMF (Session Management Function) entity.

[0051] In some embodiments, the access network device 20 and the core network element 30 communicate with each other via an air interface technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other via an air interface technology, such as the Uu interface.

[0052] The "5G NR system" in the embodiments of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of the present application may be applicable to LTE systems, 5G NR systems, and subsequent evolution systems of 5G NR systems (e.g., B5G (Beyond 5G) systems, 6G systems (6th Generation System, sixth generation mobile communication systems)), and other communication systems such as NB-IoT (Narrow Band Internet of Things) systems, which are not limited in this application.

[0053] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0054] Please refer to Figure 2, which shows a flow chart of a carrier activation method provided by an embodiment of the present application. The method may include at least one of the following steps 210 to 220.

[0055] Step 210: The network device sends an activation command to the terminal device on the first carrier, where the activation command is used to activate the second carrier.

[0056] Accordingly, the terminal device receives the activation command on the first carrier.

[0057] A carrier is the fundamental waveform or frequency used to transmit data and information in wireless communications. The first carrier is the carrier currently in use by a terminal device, and the second carrier is the carrier to be activated. The first and second carriers are different carriers. Carrier activation refers to starting or activating a carrier on a specific frequency, making it available for signal transmission. An activation command requests that a terminal device activate or start a corresponding carrier on a specified frequency or channel.

[0058] In some embodiments, the network device may send MAC CE (Medium Access Control Control Element) information to the terminal device, and the MAC CE information may include the above activation command.

[0059] In some embodiments, the MAC CE information may also include other control and configuration information, which is transmitted through the MAC layer and plays an important role in wireless resource allocation, scheduling, connection control and function configuration.

[0060] In some embodiments, carrier aggregation is implemented based on the activation of multiple carriers. Carrier aggregation refers to the simultaneous use of multiple different activated carriers to transmit data in wireless communications to increase the system's channel capacity and data transmission rate.

[0061] As shown in Figure 3, the UE is configured with two serving cells. These two serving cells are in an activated state, with bandwidths of 30M and 50M respectively. At this time, the UE's maximum transmission bandwidth is equivalent to 80M. In this configuration, the UE can be connected to these two serving cells at the same time and transmit data through the multiple carriers provided by them. In this scenario, each serving cell can be regarded as a carrier that provides specific bandwidth resources to the UE. Each serving cell can be composed of multiple carriers, and the UE can switch between multiple carriers within the same serving cell or between multiple carriers in different serving cells as needed. In this way, the UE can flexibly select and utilize the carrier resources provided by the two serving cells according to actual transmission needs to maximize its data transmission needs.

[0062] In some embodiments, the second carrier and the first carrier meet a first condition, where the first condition includes at least one of the following: same AGC, time domain synchronization, frequency domain synchronization, and sharing the same radio frequency channel.

[0063] In some embodiments, the second carrier and the first carrier both belong to a first virtual carrier.

[0064] AGC refers to a technique that continuously adjusts the signal's gain to maintain the signal within an appropriate range. In wireless communication systems, AGC is typically used to control the strength of the received signal to ensure that the signal is processed and demodulated at the appropriate level. In some embodiments, identical AGC refers to the same AGC parameters for both carriers. When the AGC parameters are identical for both carriers, it means that they perform gain control based on similar received signal strength levels, providing consistent reception performance, which is important for carrier switching and resource allocation.

[0065] Time domain synchronization of the first and second carriers refers to ensuring clock synchronization between multiple different carriers in a wireless communication system by performing time domain synchronization on each carrier. Specifically, each carrier has its own clock signal, so in a wireless communication system, the clock signal of each carrier needs to be synchronized, that is, time domain synchronization between each carrier is achieved. Time domain synchronization mainly involves clock recovery of the receiving device and correction of the time offset of the received signal to enable the received signal to be correctly demodulated and processed. When the second carrier is time domain synchronized with the first carrier, the second carrier can maintain time synchronization with the first carrier.

[0066] Frequency domain synchronization of the first carrier and the second carrier refers to ensuring frequency synchronization between multiple different carriers by performing frequency domain synchronization on each carrier in a wireless communication system. Specifically, each carrier has its own frequency, so in a wireless communication system, it is necessary to synchronize the frequency of each carrier, that is, to achieve frequency domain synchronization between each carrier. Frequency domain synchronization usually involves frequency domain analysis and frequency offset estimation of the received signal so that the received signal can be demodulated and processed at the correct frequency. When the second carrier is frequency domain synchronized with the first carrier, the second carrier can maintain frequency synchronization with the first carrier.

[0067] A radio frequency channel is a physical medium used to transmit and receive radio frequency signals in wireless communication systems, allowing wireless devices to transmit and receive wireless signals. This channel can include wireless channels over air or wired channels transmitted via media such as cables and optical fibers. Sharing the same radio frequency channel with the first carrier means that they share the same radio frequency channel in the same frequency band, space, and time for signal transmission and reception. Sharing the same radio frequency channel with the second carrier requires that the first carrier and the second carrier have the same AGC, time domain synchronization, or frequency domain synchronization.

[0068] A virtual carrier refers to a logical carrier composed of multiple subcarriers formed by uniformly dividing the frequency bands of multiple physical carriers in a wireless communication system. This means that a virtual carrier can be composed of different physical carriers, and efficient resource utilization and data transmission can be achieved through appropriate scheduling and allocation technologies. The first carrier and the second carrier both belong to the first virtual carrier, which means that both the first carrier and the second carrier are allocated to the first virtual carrier. The first virtual carrier refers to any virtual carrier. In other words, the first carrier and the second carrier belong to the same virtual carrier, that is, they are in the same virtual carrier and can share the same modulation method and other transmission parameters.

[0069] In the above method, when the second carrier and the first carrier meet the first condition, for example, they meet one or more of the following conditions: sharing the same radio frequency channel, having the same AGC, time domain synchronization, and frequency domain synchronization, then during the activation of the second carrier, no AGC, time domain synchronization, and / or frequency domain synchronization operations are required. By avoiding these additional operations, the efficiency and performance of wireless communications can be improved, and data transmission delays can be reduced, thereby shortening the activation time of the second carrier.

[0070] In some embodiments, when the second carrier does not meet the same AGC, time domain synchronization and frequency domain synchronization as the first carrier, the terminal device needs to perform corresponding synchronization operations to ensure normal communication connection and data transmission. Exemplarily, when the second carrier meets the same AGC and time domain synchronization as the first carrier, the terminal device needs to perform frequency domain synchronization. Specifically, the terminal device can search, estimate the frequency offset and compensate for the frequency domain offset of the second carrier to ensure frequency synchronization with the first carrier, thereby achieving normal communication connection and data transmission. Exemplarily, when the second carrier meets the time domain synchronization with the first carrier, the terminal device needs to perform AGC and frequency domain synchronization.

[0071] In some embodiments, when the second carrier and the first carrier both belong to the first virtual carrier, each physical carrier included in the first virtual carrier (or the same virtual carrier) meets the second condition, and the second condition includes at least one of the following: the same AGC, time domain synchronization, and frequency domain synchronization.

[0072] A physical carrier refers to the actual carrier used to transmit and receive data in a communication system. The first carrier and the second carrier can be two different physical carriers. When the first carrier and the second carrier belong to the same virtual carrier, the first carrier and the second carrier meet one or more of the following conditions: identical AGC, time domain synchronization, and frequency domain synchronization.

[0073] In the above method, when the first carrier and the second carrier belong to the same virtual carrier, the terminal device does not need to perform AGC, time domain synchronization, and frequency domain synchronization operations. By avoiding these additional operations, the activation time of the second carrier is shortened.

[0074] In some embodiments, the network device sends configuration information to the terminal device, where the configuration information is used to indicate that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier.

[0075] Accordingly, the terminal device receives the configuration information.

[0076] Configuration information refers to parameters and settings indicating that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier. The configuration information may include at least one of the following: AGC setting parameters, time domain synchronization parameters, frequency domain synchronization parameters, RF channel allocation parameters, and virtual carrier allocation parameters. In some embodiments, the AGC setting parameters refer to parameters and settings related to automatic gain control, and may include parameters such as signal strength range, gain increment, and gain smoothness to ensure that the signal strength of the second carrier and the first carrier are consistent. In some embodiments, the time domain synchronization parameters refer to parameters such as clock synchronization and timing settings to ensure that the second carrier and the first carrier can be received and demodulated at the correct time domain location. In some embodiments, the frequency domain synchronization parameters refer to parameters such as frequency offset correction and frequency offset compensation to ensure that the second carrier and the first carrier can be received and demodulated at the same frequency domain location. In some embodiments, the RF channel allocation parameters may include settings such as channel bandwidth, frequency range, and bandwidth allocation. By properly allocating RF channels, the second carrier and the first carrier can share the same wireless channel resources across the frequency range, avoiding interference and conflict. In some embodiments, the virtual carrier allocation parameters may specify that the first and second carriers use the same number of subcarriers, carrier spacing, and carrier type to ensure that they are in the same virtual carrier. With the above method, the terminal device can promptly receive information regarding whether the second carrier and the first carrier meet the first condition. Thus, when activating the second carrier, the terminal device does not need to perform AGC, time domain synchronization, or frequency domain synchronization operations and can directly activate the second carrier. This can improve the performance and efficiency of the wireless communication system and shorten the activation time of the second carrier.

[0077] In some embodiments, the network device sends an activation command to the terminal device, where the activation command includes configuration information. The terminal device parses the activation command to promptly learn that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier.

[0078] In some embodiments, the network device separately sends configuration information to the terminal device. The terminal device parses the configuration information and promptly learns that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier. Whether the configuration information is included in the activation command for transmission or transmitted separately, the purpose is to indicate to the terminal device that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier. This application does not limit the method for transmitting the configuration information.

[0079] In some embodiments, no SSB (Synchronization Signal Block) is sent on the second carrier.

[0080] Terminal devices typically rely on receiving multiple SSBs for AGC, time domain synchronization, and frequency domain synchronization. SSBs are periodic signals with a typical period of 20 milliseconds. Therefore, during the second carrier activation process, multiple SSBs must be received and parsed, and the activation process typically takes 40 milliseconds or longer.

[0081] However, since the first carrier and the second carrier meet the first condition or both belong to the first virtual carrier, that is, the first carrier and the second carrier meet one or more of the following conditions: the same AGC, time domain synchronization, frequency domain synchronization, sharing the same RF channel, and belonging to the same virtual carrier, in this case, the SSB on the second carrier can be not sent.

[0082] By not sending the SSB on the second carrier, the above method can save time in receiving and parsing the SSB, thereby speeding up the activation process of the second carrier. In addition, omitting the SSB configuration of the second carrier can save related resource overhead.

[0083] In step 220, the terminal device sends a CSI report for the second carrier, wherein the time unit in which the terminal device receives the activation command is the first time unit, the time unit in which the terminal device sends the CSI report is no later than the second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following: the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command.

[0084] Correspondingly, the network device receives the CSI report for the second carrier sent by the terminal device in a third time unit, where the third time unit is no later than the second time unit.

[0085] In an embodiment of the present application, the time unit in which the terminal device sends the CSI report for the second carrier is a third time unit. The third time unit is no later than the second time unit. The so-called third time unit is no later than the second time unit means that the third time unit is the second time unit, or the third time unit is before the second time unit. For example, if the second time unit is time slot m, the third time unit can be the time slot m, or a time slot that is located before the time slot m in the time domain.

[0086] A CSI report is a report used to provide feedback on channel state information. In wireless communication systems, a CSI report provides information about channel quality and characteristics. A CSI report may include information such as the CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), and RI (Rank Indicator). This application does not limit the content of a CSI report.

[0087] Specifically, the CSI report for the second carrier may include at least one of the following: the received signal quality of the second carrier, the spectrum utilization of the second carrier, and the transmission power and interference level of other user equipment. The received signal quality of the second carrier refers to indicators such as signal strength, signal-to-noise ratio, and bit error rate, which are used to describe the signal quality and reliability of the second carrier at the receiving end; the spectrum utilization of the second carrier is used to describe the utilization rate of the second carrier on the spectrum resources and the current interference situation; the transmission power and interference level of other user equipment are used to describe the interference and competition situation of the second carrier in a multi-user environment. This application does not limit the information contained in the CSI report.

[0088] By providing the network device with the CSI report of the second carrier, the network device can understand the quality and characteristics of the second carrier. This information can help the network device decide whether to activate the second carrier and make corresponding adjustments and optimizations during the activation process. Specifically, if the CSI report shows that the quality of the second carrier is good and there is no major interference or problems, the network device can choose to activate the second carrier to improve the transmission rate and system capacity. Conversely, if the CSI report shows that the quality of the second carrier is poor, there is interference or low capacity, the network device can temporarily not activate or adjust the relevant parameters to avoid unnecessary performance degradation. Therefore, the CSI report of the second carrier can provide the network device with important information about the quality of the second carrier, which has certain guiding significance for deciding whether to activate the second carrier and the optimization during the activation process.

[0089] In some embodiments, please refer to Figure 4, which shows a schematic diagram of a carrier activation process provided by one embodiment of the present application. In Figure 4, the first time unit is time slot n, and the second time unit is time slot n + (T1 + T2) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time for CSI reporting, and t is the length of a single time slot. The third time unit being no later than the second time unit means that the third time unit is no later than time slot n + (T1 + T2) / t.

[0090] ACK feedback is a feedback signal confirming the receipt of received data, indicating whether the data was successfully received during transmission. Specifically, ACK feedback is used to inform the network device that the terminal device has successfully received the activation command. The timing between downlink data transmission and ACK feedback is the interval between the network device sending downlink data and the terminal device sending ACK feedback back to the network device. During this interval, the network device waits for ACK feedback to confirm whether the data was successfully received.

[0091] The length of a single time slot refers to the length of time occupied by a time slot. In wireless communication systems, time domain resources are divided based on the length of a single time slot. The length of a single time slot can vary depending on the communication system. For example, in the LTE (Long Term Evolution) communication system, the length of a time slot is approximately 0.5ms. Different time slots can be allocated to different terminal devices to enable concurrent multi-user communication.

[0092] In this application, the result of (T1+T2) / t represents a multiple of the length of a single time slot. The definition of the first time unit and the second time unit is not limited to the length of a single time slot. This application does not limit the definition of the first time unit and the second time unit.

[0093] The processing of CSI reporting includes three steps. First, the network device sends CSI-RS (Channel State Information Reference Signal) to the terminal device on the second carrier. CSI-RS is used for mobility measurement. Then, the terminal device receives the CSI-RS sent on the second carrier and performs mobility measurement based on the CSI-RS. The mobility measurement based on CSI-RS means that the terminal device uses the received CSI-RS to evaluate the mobility capability and channel quality. For example, the terminal device can obtain information about the channel state and signal quality by analyzing indicators such as RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), channel gain, frequency offset estimation, etc. of the received CSI-RS. This application does not limit this.

[0094] Finally, the terminal device will save the mobility measurement results based on CSI-RS and wait for reporting resources to send them to the network device. Reporting resources refer to some physical channels or channel state information available to the terminal device, which are used to transmit information such as the mobility measurement results based on CSI-RS to the network device.

[0095] Accordingly, based on the aforementioned CSI reporting process, the CSI reporting processing time includes: the first available downlink CSI-RS latency, the CSI measurement processing time, and the first available CSI reporting latency. The first available downlink CSI-RS latency refers to the time delay from when the CSI-RS transmitted by the network device reaches the terminal device. This latency includes both signal propagation time and system latency, i.e., the total duration from when the network device sends the signal to when the terminal device receives it. The CSI measurement processing time refers to the time it takes the terminal device to process and encode the received CSI-RS. This time includes filtering, denoising, compensating, and encoding the collected CSI-RS. The first available CSI reporting latency refers to the time delay from when the terminal device completes CSI-RS-based mobility measurements to when these measurement results can be sent to the network device using available reporting resources. It reflects the time interval between when the terminal device completes the measurement and when it actually reports. The first available CSI reporting latency depends on multiple factors, including the terminal device's reporting strategy, network transmission latency, and resource contention. Typically, a terminal device determines a reporting timing based on specific policy rules and performance requirements. The timing may be a fixed time interval, triggered by a specific event, or determined through negotiation with a network device.

[0096] In some embodiments, the activation process of the second carrier is divided into two cases, as shown in Figure 4, one is the case of a known cell (Known cell), and the other is the case of an unknown cell (Unknown cell). In the present application, a known cell means that the terminal device knows the cell information where the second carrier is located, and an unknown cell means that the terminal device is not clear about the cell information where the second carrier is located. When the terminal device knows the cell information where the second carrier is located, the activation time of the second carrier is usually relatively short. When the terminal device is not clear about the cell information where the second carrier is located, the activation time of the second carrier is usually relatively long.

[0097] In Figure 4, PDCCH (Physical Downlink Control Channel) and PDSCH (Physical Downlink Shared Channel) refer to two types of physical channels used to transmit downlink data in wireless communication systems. PDCCH is mainly used to transmit downlink control information, such as scheduling control, transmission format control, power control, etc.; while PDSCH mainly carries downlink user data. The terminal device receives the PDSCH sent by the network device in time slot n, where the PDSCH includes an activation command for the second carrier. After time T1, the terminal device completes the ACK feedback and completes the processing of the CSI report after time T2. Therefore, after time slot n+(T1+T2) / t, the second carrier can be activated, that is, the terminal device can receive and / or send data on the second carrier.

[0098] Exemplarily, the terminal device receives configuration information indicating that the second carrier and the first carrier belong to the same virtual carrier. When the second carrier and the first carrier belong to the same virtual carrier, the two carriers have the same AGC, time domain synchronization, and frequency domain synchronization. The terminal device receives an activation command for the second carrier in time slot n of the first carrier, and the terminal device will send a valid CSI report no later than time slot n+(T1+T2) / t. Wherein, T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, and t is the length of a single time slot. For example, T1 is indicated as k1 through DCI (Downlink Control Information). According to the CSI-RS configuration, the delay of the first available downlink CSI-RS relative to the ACK feedback moment is k2. The processing time of the CSI report is determined to be k3 according to the processing capability of the terminal device. The delay of the first available CSI report relative to the completion of the CSI report processing is determined to be k4 according to the CSI reporting resource configuration. Assuming that the length of a single time slot is 1ms, the terminal device sends a valid CSI report after time slot n+(k1+k2+k3+k4) / 1ms, and the second carrier is activated, that is, the terminal device can receive and / or send data on the second carrier.

[0099] Exemplarily, the terminal device reports virtual carrier information, or the virtual carrier information is agreed upon by the protocol. The second carrier and the first carrier belong to the same virtual carrier, the first carrier and the second carrier in the virtual carrier share the same RF channel, the same AGC, time domain synchronization and frequency domain synchronization. Similarly, the terminal device receives the activation command of the second carrier in the time slot n of the first carrier, and the terminal device will send a valid CSI report no later than the time slot n+(T1+T2) / t. For example, T1 is indicated as k1 through DCI. According to the CSI-RS configuration, the delay of the first available downlink CSI-RS relative to the ACK feedback moment is k2. The processing time of the CSI report is determined to be k3 according to the processing capability of the terminal device. The delay of the first available CSI report relative to the completion of the CSI report processing is k4 according to the CSI report resource configuration. Assuming that the length of a single time slot is 1ms, the terminal device sends a valid CSI report after the time slot n+(k1+k2+k3+k4) / 1ms, and the second carrier is activated, that is, the terminal device can receive and / or send data on the second carrier.

[0100] In some embodiments, the first time unit is time slot n, and the second time unit is time slot n+(T1+T2+T3) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single time slot.

[0101] As shown in Figure 4, T3 represents the time it takes for the terminal device to parse and execute the activation command. Parsing and executing the activation command by the terminal device refers to the process of parsing and executing the activation command after the terminal device receives the activation command from the network device. The activation command usually needs to be processed at the MAC layer of the terminal device. Specifically, when the terminal device receives the activation command, it first needs to parse the activation command to obtain the relevant information contained in the command, such as the frequency and mode of the second carrier to be activated. After the parsing is completed, the terminal device will perform corresponding operations according to the instructions in the activation command, including turning on or off specific wireless resources, starting or stopping the second carrier, etc. The time it takes for the terminal device to parse and execute the activation command refers to the time required to complete the above-mentioned parsing and execution operations.

[0102] In Figure 4, the terminal device receives the PDSCH sent by the network device in time slot n, where the PDSCH includes an activation command for the second carrier. After time T1, the terminal device completes the ACK feedback, and after time T3, the terminal device completes the parsing and execution of the activation command. After time T2, the processing of the CSI report is completed. Therefore, after time slot n + (T1 + T2 + T3) / t, the second carrier can be activated, that is, the terminal device can receive and / or send data on the second carrier.

[0103] Exemplarily, the terminal device receives configuration information indicating that the second carrier and the first carrier belong to the same virtual carrier. When the second carrier and the first carrier belong to the same virtual carrier, the two have the same AGC, time domain synchronization and frequency domain synchronization. The terminal device receives the activation command of the second carrier in time slot n of the first carrier, and the terminal device will send a valid CSI report no later than time slot n+(T1+T2+T3) / t. For example, T1 is indicated as k1 through DCI. According to the periodic CSI-RS configuration, the delay of the first available downlink CSI-RS relative to the ACK feedback moment is k3. The processing time of the CSI report is determined to be k4 according to the processing capability of the terminal device. The delay of the first available CSI report relative to the completion of the CSI report processing is k5 according to the CSI report resource configuration. Assuming that the length of a single time slot is 1ms, the terminal sends a valid CSI report after time slot n+(k1+k2+k3+k4+k5) / 1ms, and the second carrier is activated, that is, the terminal device can receive and / or send data on the second carrier.

[0104] Exemplarily, the terminal device reports virtual carrier information, or the virtual carrier information is agreed upon by the protocol. The second carrier and the first carrier belong to the same virtual carrier, the first carrier and the second carrier in the virtual carrier share the same RF channel, the same AGC, and time and frequency domain synchronization. If the terminal device receives an activation command for the second carrier in time slot n of the first carrier, the terminal device will send a valid CSI report no later than time slot n + (T1 + T2 + T3) / t. For example, T1 is indicated as k1 through DCI. According to the periodic CSI-RS configuration, the delay of the first available downlink CSI-RS relative to the ACK feedback moment is k3. The processing time of the CSI report is determined to be k4 according to the processing capability of the terminal device. The delay of the first available CSI report relative to the completion of the CSI report processing is determined to be k5 according to the CSI reporting resource configuration. Assuming that the length of a single time slot is 1ms, the terminal device sends a valid CSI report after time slot n+(k1+k2+k3+k4+k5) / 1ms, and the second carrier is activated, that is, the terminal device can receive and / or send data on the second carrier.

[0105] The technical solution provided by the present application, during the carrier activation process, only considers at least one of the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command. This avoids the time spent on other unnecessary steps included in the carrier activation process, such as AGC, time domain synchronization, and frequency domain synchronization steps, reduces the delay of CSI reporting, and thus shortens the carrier activation time.

[0106] In the above method embodiments, the technical solution of this application is described only from the perspective of the interaction between a terminal device and a network device. The above steps performed by the terminal device can be independently implemented as a carrier activation method on the terminal device side, and the above steps performed by the network device can be independently implemented as a carrier activation method on the network device side. In addition, the embodiments provided herein can be arbitrarily combined to form new embodiments, all of which are within the scope of protection of this application.

[0107] The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0108] Please refer to Figure 5, which shows a block diagram of a carrier activation device provided by one embodiment of the present application. This device has the function of implementing the carrier activation method on the terminal device side described above. This function can be implemented through hardware or by hardware executing corresponding software. This device can be the terminal device described above, or it can be provided in a terminal device. As shown in Figure 5, the device 500 may include: a receiving module 510 and a sending module 520.

[0109] The receiving module 510 is configured to receive an activation command on the first carrier, where the activation command is used to activate the second carrier.

[0110] The sending module 520 is used to send a CSI report for the second carrier, wherein the time unit in which the terminal device receives the activation command is a first time unit, and the time unit in which the terminal device sends the CSI report is no later than a second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following: the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command.

[0111] In some embodiments, the first time unit is time slot n, and the second time unit is time slot n+(T1+T2) / t, where T1 is the timing between the downlink data transmission and the ACK feedback, T2 is the processing time of the CSI report, and t is the length of a single time slot.

[0112] In some embodiments, the first time unit is time slot n, and the second time unit is time slot n+(T1+T2+T3) / t, wherein T1 is the timing between the downlink data transmission and the ACK feedback, T2 is the processing time of the CSI report, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single time slot.

[0113] In some embodiments, the second carrier and the first carrier satisfy a first condition or both belong to a first virtual carrier, where the first condition includes at least one of the following: same AGC, time domain synchronization, frequency domain synchronization, and sharing the same radio frequency channel.

[0114] In some embodiments, when the second carrier and the first carrier both belong to a first virtual carrier, each physical carrier included in the first virtual carrier satisfies a second condition, and the second condition includes at least one of the following: same AGC, time domain synchronization, and frequency domain synchronization.

[0115] In some embodiments, the receiving module 510 is further configured to receive configuration information, where the configuration information is used to indicate that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier.

[0116] In some embodiments, SSB is not transmitted on the second carrier.

[0117] In some embodiments, as shown in FIG5 , the apparatus 500 further includes: a processing module (not shown in FIG5 ).

[0118] The receiving module 510 is further configured to receive the CSI-RS sent on the second carrier.

[0119] The processing module is configured to perform mobility measurement based on the CSI-RS.

[0120] The technical solution provided by the present application, during the carrier activation process, only considers at least one of the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command. This avoids the time spent on other unnecessary steps included in the carrier activation process, such as AGC, time domain synchronization, and frequency domain synchronization steps, reduces the delay of CSI reporting, and thus shortens the carrier activation time.

[0121] Please refer to Figure 6, which shows a block diagram of a carrier activation device provided by another embodiment of the present application. This device has the function of implementing the carrier activation method on the network device side described above. This function can be implemented in hardware or by hardware executing corresponding software. This device can be the network device described above, or it can be installed in a network device. As shown in Figure 6, the device 600 can include: a sending module 610 and a receiving module 620.

[0122] The sending module 610 is configured to send an activation command to a terminal device on a first carrier, where the activation command is used to activate a second carrier, and the activation command is received by the terminal device in a first time unit.

[0123] The receiving module 620 is used to receive the CSI report for the second carrier sent by the terminal device in the third time unit, wherein the third time unit is not later than the second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following: the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command.

[0124] In some embodiments, the first time unit is time slot n, and the second time unit is time slot n+(T1+T2) / t, where T1 is the timing between the downlink data transmission and the ACK feedback, T2 is the processing time of the CSI report, and t is the length of a single time slot.

[0125] In some embodiments, the first time unit is time slot n, and the second time unit is time slot n+(T1+T2+T3) / t, wherein T1 is the timing between the downlink data transmission and the ACK feedback, T2 is the processing time of the CSI report, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single time slot.

[0126] In some embodiments, the second carrier and the first carrier satisfy a first condition or both belong to a first virtual carrier, where the first condition includes at least one of the following: same AGC, time domain synchronization, frequency domain synchronization, and sharing the same radio frequency channel.

[0127] In some embodiments, when the second carrier and the first carrier both belong to a first virtual carrier, each physical carrier included in the first virtual carrier satisfies a second condition, and the second condition includes at least one of the following: same AGC, time domain synchronization, and frequency domain synchronization.

[0128] In some embodiments, the sending module 610 is further configured to send configuration information to the terminal device, where the configuration information is configured to indicate that the second carrier and the first carrier meet the first condition or both belong to the first virtual carrier.

[0129] In some embodiments, SSB is not transmitted on the second carrier.

[0130] In some embodiments, the sending module 610 is further configured to send a CSI-RS to the terminal device on the second carrier, where the CSI-RS is used for mobility measurement.

[0131] The technical solution provided by the present application, during the carrier activation process, only considers at least one of the timing between downlink data transmission and ACK feedback, the processing time of CSI reporting, and the time for the terminal device to parse and execute the activation command. This avoids the time spent on other unnecessary steps included in the carrier activation process, such as AGC, time domain synchronization, and frequency domain synchronization steps, reduces the delay of CSI reporting, and thus shortens the carrier activation time.

[0132] It should be noted that, when the device provided in the above embodiment realizes its function, it only uses the division of the above-mentioned functional modules as an example. In actual application, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0133] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here. For details not described in detail in the embodiment of the device, reference can be made to the above method embodiment.

[0134] Please refer to Figure 7, which shows a schematic diagram of the structure of a terminal device provided in one embodiment of the present application. The terminal device 700 can be used to execute the method steps performed by the terminal device in the above embodiment. The terminal device 700 may include: a processor 701, a transceiver 702, and a memory 703. The transceiver 702 is used to implement a sending or receiving function, such as the functions of the receiving module 510 described above. The processor 701 can be used to implement other processing functions or control sending and / or receiving, such as the functions of the processing module described above.

[0135] The processor 701 includes one or more processing cores. The processor 701 executes various functional applications and information processing by running software programs and modules.

[0136] The transceiver 702 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0137] The memory 703 may be connected to the processor 701 and the transceiver 702 .

[0138] The memory 703 may be used to store a computer program executed by the processor, and the processor 701 is used to execute the computer program to implement each step in the above method embodiment.

[0139] In some embodiments, the transceiver 702 is used to receive an activation command on a first carrier, where the activation command is used to activate a second carrier; and to send a CSI report for the second carrier, wherein the time unit in which the terminal device receives the activation command is a first time unit, and the time unit in which the terminal device sends the CSI report is no later than the second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following: the timing between downlink data transmission and ACK feedback; the processing time of the CSI report; and the time for the terminal device to parse and execute the activation command.

[0140] Please refer to Figure 8, which shows a schematic diagram of the structure of a network device provided in one embodiment of the present application. The network device can be used to execute the method steps performed by the network device in the above embodiments. The network device 800 may include: a processor 801, a transceiver 802, and a memory 803. The transceiver 802 is used to implement transmission or reception functions, such as the functions of the above-mentioned receiving module 620. The processor 801 can be used to implement other processing functions or control transmission and / or reception.

[0141] The processor 801 includes one or more processing cores. The processor 801 executes various functional applications and information processing by running software programs and modules.

[0142] The transceiver 802 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0143] The memory 803 may be connected to the processor 801 and the transceiver 802 .

[0144] The memory 803 may be used to store a computer program executed by the processor, and the processor 801 is used to execute the computer program to implement each step in the above method embodiment.

[0145] In some embodiments, the transceiver 802 is used to send an activation command to the terminal device on the first carrier, the activation command is used to activate the second carrier, and the activation command is received by the terminal device in the first time unit; and is used to receive the CSI report for the second carrier sent by the terminal device in the third time unit, wherein the third time unit is not later than the second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following: the timing between downlink data transmission and ACK feedback; the processing time of CSI reporting; the time for the terminal device to parse and execute the activation command.

[0146] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0147] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0148] An embodiment of the present application further provides a computer-readable storage medium, wherein a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the carrier activation method on the terminal device side or the carrier activation method on the network device side. In some embodiments, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or an optical disk, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0149] An embodiment of the present application also provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above-mentioned carrier activation method on the terminal device side, or to implement the above-mentioned carrier activation method on the network device side.

[0150] An embodiment of the present application also provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned carrier activation method on the terminal device side, or to implement the above-mentioned carrier activation method on the network device side.

[0151] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0152] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0153] In some embodiments of the present application, "predefined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0154] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0155] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0156] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0157] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0158] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0159] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A carrier activation method, characterized in that, The method includes: The terminal device receives an activation command on a first carrier, where the activation command is used to activate a second carrier; The terminal device sends a channel state information (CSI) report for the second carrier. Among them, the time unit when the terminal device receives the activation command is a first time unit, and the time unit when the terminal device sends the CSI report is not later than a second time unit. The time interval from the first time unit to the second time unit is related to at least one of the following: The timing between downlink data transmission and positive acknowledgment (ACK) feedback; The processing time of CSI reporting; The time for the terminal device to parse and execute the activation command.

2. The method according to claim 1, wherein The first time unit is slot n, and the second time unit is slot n+(T1+T2) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, and t is the length of a single slot.

3. The method according to claim 1, characterized in that, The first time unit is slot n, and the second time unit is slot n+(T1+T2+T3) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single slot.

4. The method according to any one of claims 1 to 3, characterized in that, The second carrier and the first carrier satisfy a first condition or both belong to a first virtual carrier. The first condition includes at least one of the following: The same automatic gain control (AGC); Time domain synchronization; Frequency domain synchronization; Sharing the same radio frequency channel.

5. The method according to claim 4, characterized in that, In the case where the second carrier and the first carrier both belong to the first virtual carrier, each physical carrier included in the first virtual carrier satisfies a second condition. The second condition includes at least one of the following: the same AGC, time domain synchronization, and frequency domain synchronization.

6. The method according to claim 4 or 5, characterized in that, The method further includes: Receiving configuration information, where the configuration information is used to indicate that the second carrier and the first carrier satisfy the first condition or both belong to the first virtual carrier.

7. The method according to any one of claims 1 to 6, characterized in that No synchronization signal block (SSB) is sent on the second carrier.

8. The method according to any one of claims 1 to 7, characterized in that, The method further includes: Receiving a channel state information-reference signal (CSI-RS) sent on the second carrier; Performing mobility measurement based on the CSI-RS.

9. A carrier activation method, characterized in that, The method includes: The network device sends an activation command to the terminal device on a first carrier, where the activation command is used to activate a second carrier, and the activation command is received by the terminal device at a first time unit; The network device receives a CSI report for the second carrier sent by the terminal device at a third time unit, where the third time unit is not later than the second time unit. The time interval from the first time unit to the second time unit is related to at least one of the following: The timing between downlink data transmission and positive acknowledgment (ACK) feedback; The processing time of CSI reporting; The time for the terminal device to parse and execute the activation command.

10. The method according to claim 9, wherein The first time unit is time slot n, and the second time unit is time slot n + (T1 + T2) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, and t is the length of a single time slot.

11. The method according to claim 9, wherein The first time unit is time slot n, and the second time unit is time slot n + (T1 + T2 + T3) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single time slot.

12. The method according to any one of claims 9 to 11, characterized in that, The second carrier satisfies a first condition with the first carrier or both belong to a first virtual carrier. The first condition includes at least one of the following: The automatic gain control (AGC) is the same; Time domain synchronization; Frequency domain synchronization; Sharing the same radio frequency channel.

13. The method according to claim 12, wherein When the second carrier and the first carrier both belong to the first virtual carrier, each physical carrier included in the first virtual carrier satisfies a second condition. The second condition includes at least one of the following: the AGC is the same, time domain synchronization, and frequency domain synchronization.

14. The method according to claim 12 or 13, characterized in that, The method further includes: Sending configuration information to the terminal device, where the configuration information is used to indicate that the second carrier satisfies the first condition with the first carrier or both belong to the first virtual carrier.

15. The method according to any one of claims 9 to 14, characterized in that, No synchronization signal block (SSB) is sent on the second carrier.

16. The method according to any one of claims 9 to 15, characterized in that The method further includes: Sending a channel state information-reference signal (CSI-RS) to the terminal device on the second carrier, where the CSI-RS is used for mobility measurement.

17. A carrier activation device, characterized in that, The apparatus includes: A receiving module, configured to receive an activation command on a first carrier, where the activation command is used to activate a second carrier; A sending module, configured to send a CSI report for the second carrier. The time unit when the terminal device receives the activation command is the first time unit, and the time unit when the terminal device sends the CSI report is not later than the second time unit. The time interval from the first time unit to the second time unit is related to at least one of the following: The timing between downlink data transmission and an acknowledgement (ACK) feedback; The processing time of CSI reporting; The time for the terminal device to parse and execute the activation command.

18. The device according to claim 17, wherein The first time unit is time slot n, and the second time unit is time slot n + (T1 + T2) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, and t is the length of a single time slot.

19. The device according to claim 17, wherein, The first time unit is time slot n, and the second time unit is time slot n + (T1 + T2 + T3) / t, where T1 is the timing between downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single time slot.

20. The device according to any one of claims 17 to 19, characterized in that The second carrier satisfies a first condition with the first carrier or both belong to a first virtual carrier. The first condition includes at least one of the following: The automatic gain control (AGC) is the same; Time domain synchronization; Frequency domain synchronization; Share the same radio frequency channel.

21. The device according to claim 20, characterized in that, When the second carrier and the first carrier both belong to the first virtual carrier, each physical carrier included in the first virtual carrier satisfies a second condition, and the second condition includes at least one of the following: the same AGC, time domain synchronization, and frequency domain synchronization.

22. The device according to claim 20 or 21, characterized in that, The receiving module is further configured to receive configuration information, where the configuration information is used to indicate that the second carrier and the first carrier satisfy the first condition or both belong to the first virtual carrier.

23. The device according to any one of claims 17 to 22, characterized in that, No synchronization signal block SSB is sent on the second carrier.

24. The device according to any one of claims 17 to 23, characterized in that The device further includes a processing module; The receiving module is further configured to receive a channel state information-reference signal CSI-RS sent on the second carrier; The processing module is configured to perform mobility measurement based on the CSI-RS.

25. A carrier activation device, characterized in that, The device includes: A sending module, configured to send an activation command to a terminal device on a first carrier, where the activation command is used to activate a second carrier, and the activation command is received by the terminal device in a first time unit; A receiving module, configured to receive a channel state information CSI report for the second carrier sent by the terminal device in a third time unit, where the third time unit is not later than a second time unit, and the time interval from the first time unit to the second time unit is related to at least one of the following: The timing between downlink data transmission and positive acknowledgment ACK feedback; The processing time of CSI reporting; The time for the terminal device to parse and execute the activation command.

26. The device according to claim 25, characterized in that, The first time unit is time slot n, and the second time unit is time slot n+(T1+T2) / t, where T1 is the timing between the downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, and t is the length of a single time slot.

27. The device according to claim 25, characterized in that, The first time unit is time slot n, and the second time unit is time slot n+(T1+T2+T3) / t, where T1 is the timing between the downlink data transmission and ACK feedback, T2 is the processing time of CSI reporting, T3 is the time for the terminal device to parse and execute the activation command, and t is the length of a single time slot.

28. The device according to any one of claims 25 to 27, characterized in that The second carrier and the first carrier satisfy a first condition or both belong to the first virtual carrier, and the first condition includes at least one of the following: The same automatic gain control AGC; Time domain synchronization; Frequency domain synchronization; Share the same radio frequency channel.

29. The device according to claim 28, characterized in that, When the second carrier and the first carrier both belong to the first virtual carrier, each physical carrier included in the first virtual carrier satisfies a second condition, and the second condition includes at least one of the following: the same AGC, time domain synchronization, and frequency domain synchronization.

30. The device according to claim 28 or 29, characterized in that The sending module is further configured to send configuration information to the terminal device, where the configuration information is used to indicate that the second carrier and the first carrier satisfy the first condition or both belong to the first virtual carrier.

31. The device according to any one of claims 25 to 30, characterized in that No synchronization signal block SSB is sent on the second carrier.

32. The device according to any one of claims 25 to 31, characterized in that, The sending module is further configured to send a channel state information-reference signal CSI-RS to the terminal device on the second carrier, where the CSI-RS is used for mobility measurement.

33. A communication device, characterized in that, The communication device includes a processor and a memory, and a computer program is stored in the memory. The processor executes the computer program to implement the method according to any one of claims 1 to 8, or to implement the method according to any one of claims 9 to 16.

34. A computer-readable storage medium, characterized in that, A computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the method according to any one of claims 1 to 8, or to implement the method according to any one of claims 9 to 16.

35. A chip, characterized in that, The chip includes programmable logic circuits and / or program instructions, which are used to implement the method according to any one of claims 1 to 8, or to implement the method according to any one of claims 9 to 16 when the chip runs.

36. A computer program product, characterized in that, The computer program product includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor reads and executes the computer instructions from the computer-readable storage medium to implement the method according to any one of claims 1 to 8, or to implement the method according to any one of claims 9 to 16.

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