WO2022151066A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022151066A1
WO2022151066A1 PCT/CN2021/071540 CN2021071540W WO2022151066A1 WO 2022151066 A1 WO2022151066 A1 WO 2022151066A1 CN 2021071540 W CN2021071540 W CN 2021071540W WO 2022151066 A1 WO2022151066 A1 WO 2022151066A1
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WO
WIPO (PCT)
Prior art keywords
secondary carrier
carrier
agc
duration
reference signal
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PCT/CN2021/071540
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English (en)
French (fr)
Inventor
韩静
张力
沈众宜
李红
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21918281.3A priority Critical patent/EP4271033A4/en
Priority to CN202180089107.6A priority patent/CN116746198A/zh
Priority to PCT/CN2021/071540 priority patent/WO2022151066A1/zh
Priority to AU2021418389A priority patent/AU2021418389A1/en
Publication of WO2022151066A1 publication Critical patent/WO2022151066A1/zh
Priority to US18/350,932 priority patent/US20230354221A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present application relates to the field of mobile communication technologies, and in particular, to a communication method and device.
  • CA carrier aggregation
  • a user equipment can aggregate multiple carriers, and the aggregated carriers include a primary carrier (PCC), also called a primary cell (Pcell), and one or more carriers.
  • PCC primary carrier
  • SCCs secondary carriers
  • secondary cells secondary cells
  • the network device wants to configure the UE to work on a certain secondary carrier, it needs to instruct the UE to activate the secondary carrier.
  • the UE needs to receive a synchronization signal block (SSB) from the network device to adjust the automatic gain control (AGC) according to the SSB, and according to the SSB and the secondary carrier to be activated synchronization, etc.
  • SSB synchronization signal block
  • the SSB is sent periodically, and the sending period of the SSB is generally relatively large, usually greater than or equal to 20 milliseconds (ms), which leads to a relatively large activation delay of the secondary carrier, and this problem cannot be solved at present.
  • Embodiments of the present application provide a communication method and apparatus, which are used to reduce the activation delay of the secondary carrier.
  • a first communication method is provided, the method being executable by a terminal device, or by a circuit system capable of implementing the functions of the terminal device, or by a larger device including the terminal device.
  • the method includes: receiving an activation command from a network device, where the activation command is used to instruct activation of a first secondary carrier, where the first secondary carrier is one of secondary carriers of the terminal device; when the first secondary carrier is known In the case of , determine whether to adjust the AGC of the first secondary carrier according to the measurement period of the terminal device on the first secondary carrier, wherein the AGC of the first secondary carrier is adjusted using a temporary reference signal; receiving a first temporary reference signal from the first secondary carrier; and performing time-frequency synchronization with the first secondary carrier according to the first temporary reference signal.
  • the secondary carrier can be activated according to the temporary reference signal, thereby reducing the dependence of the process of activating the secondary carrier on the SSB, and the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the secondary carrier.
  • the activation process of the carrier reduces the time delay of the activation process of the secondary carrier.
  • the embodiment of the present application sets a method of activating the secondary carrier according to the temporary reference signal, that is, both the network device and the terminal device can clearly determine under what circumstances the temporary reference signal should be applied, and how to apply the temporary reference signal, which regulates the network device and the terminal device.
  • the behavior of the terminal device achieves the common cognition of the terminal device and the network device.
  • determining whether to adjust the AGC of the first secondary carrier according to the measurement period of the first secondary carrier by the terminal device includes: performing the measurement of the first secondary carrier by the terminal device on the first secondary carrier. When the measurement period of the secondary carrier is less than or equal to the first measurement period, the AGC of the first secondary carrier is not adjusted. If the measurement period of the terminal device for the first secondary carrier is less than or equal to the first measurement period, indicating that the measurement period of the secondary carrier is relatively small, the previously determined AGC can continue to be applied this time. AGC of a secondary carrier to save the power consumption of the terminal equipment and simplify the activation process of the secondary carrier.
  • the first measurement period is, for example, 160 ms, or may be other values.
  • the activation duration of the first secondary carrier is obtained according to a first duration, and the first duration is that the terminal device waits and obtains the first secondary carrier from the first secondary carrier.
  • the duration of a complete set of temporary reference signal bursts. Since the embodiment of the present application activates the secondary carrier by using the temporary reference signal, the activation duration of the first secondary carrier can be obtained according to the information related to the temporary reference signal, and does not necessarily depend on the transmission period of the SSB.
  • the temporary reference signal is, for example, an aperiodic signal, or may also be a periodic signal. For example, the transmission period of the temporary reference signal is shorter than the transmission period of the SSB, so that the activation delay of the secondary carrier can be shortened.
  • T activation_time represents the activation duration of the first secondary carrier
  • T first_TempRS represents the first duration. This is just an example of a relationship that the activation duration of the first secondary carrier needs to satisfy.
  • determining whether to adjust the AGC of the first secondary carrier according to the measurement period of the first secondary carrier by the terminal device includes: performing the measurement of the first secondary carrier by the terminal device on the first secondary carrier. When the measurement period of the secondary carrier is greater than the first measurement period, a second temporary reference signal from the first secondary carrier is received; the AGC of the first secondary carrier is adjusted according to the second temporary reference signal. If the measurement period of the terminal device on the first secondary carrier is greater than the first measurement period, it indicates that the measurement period of the secondary carrier is relatively large. If the previously determined AGC is continued to be applied this time, the AGC may not be accurate enough. Therefore, in this case, the AGC of the first secondary carrier can be adjusted.
  • the time required to adjust the AGC is related to the sending cycle of the SSB or the SSB measurement timing configuration (SMTC) cycle.
  • SMTC SSB measurement timing configuration
  • the transmission period of the SSB is generally relatively large, usually greater than or equal to 20 ms, which leads to a relatively large activation delay of the secondary carrier. Therefore, the embodiment of the present application proposes that the AGC can be adjusted through the temporary reference signal, so that the activation delay of the secondary carrier can be shortened.
  • the activation duration of the first secondary carrier is obtained according to the second duration;
  • the second duration is the duration that the terminal device waits and obtains the first complete temporary reference signal burst set from the first secondary carrier, or the second duration is the maximum of the third duration and the fourth duration
  • the third duration is the duration that the terminal device waits and obtains the first complete temporary reference signal burst set from the first secondary carrier
  • the fourth duration is the duration that the terminal device waits and obtains the first complete temporary reference signal burst set from the first secondary carrier
  • the second duration can be the third duration and the fourth duration.
  • the maximum value so that the technical solutions of the embodiments of the present application can be better compatible with existing protocols.
  • the terminal equipment can also adjust the AGC.
  • the second duration can be the duration for the terminal device to wait and obtain the first complete temporary reference signal burst set from the first secondary carrier. This method does not increase the computational complexity of the terminal device. The restrictions on network devices are reduced, and greater implementation flexibility is brought to network devices.
  • T activation_time represents the activation duration of the first secondary carrier
  • T first_TempRS represents the second duration
  • T TempRS represents that the terminal device waits and obtains a complete temporary reference signal burst from the first secondary carrier duration of the set. This is just an example of a relationship that the activation duration of the first secondary carrier needs to satisfy.
  • T activation_time indicates the activation duration of the first secondary carrier
  • T first_TempRS indicates the third duration
  • T first_RS indicates the fourth duration
  • max ⁇ x,y ⁇ indicates the maximum value of x and y
  • T TempRS indicates the duration for which the terminal device waits and obtains a complete temporary reference signal burst set from the first secondary carrier. This is just an example of a relationship that the activation duration of the first secondary carrier needs to satisfy.
  • the reference signal from the second carrier includes one or more of the following: SSB, CSI-RS, or temporary reference signal. This embodiment of the present application does not limit the reference signal on the activated carrier of the terminal device.
  • the method further includes: sending capability information to the network device, where the capability information is used to indicate that the adjustment of the AGC is related to other carriers except the first secondary carrier, or , the capability information is used to indicate that the adjustment of the AGC is independent of other carriers except the first secondary carrier. In this way, the AGC adjustment process of the UE can be made more in line with the capability of the UE.
  • the first secondary carrier belongs to a first frequency range.
  • the first frequency range is, for example, a low frequency range, such as a frequency range (FR) 1, or other frequency ranges.
  • a second communication method which can be performed by a terminal device, or by a circuit system capable of implementing the functions of the terminal device, or by a larger device including the terminal device.
  • the method includes: receiving an activation command from a network device, where the activation command is used to instruct activation of a first secondary carrier, where the first secondary carrier is one of the secondary carriers of the terminal device; when the first secondary carrier is unknown In this case, determine whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device, or, if the first secondary carrier is unknown, receive first indication information from the network device , the first indication information is used to indicate not to adjust the AGC of the first secondary carrier, or to indicate the adjustment mode of the AGC of the first secondary carrier; receive the first temporary reference signal from the first secondary carrier ; perform time-frequency synchronization with the first secondary carrier according to the first temporary reference signal.
  • the terminal device may assist in activating the secondary carrier according to the temporary reference signal.
  • the terminal device may adjust the AGC according to the temporary reference signal, and may also perform time-frequency synchronization with the first secondary carrier according to the temporary reference signal.
  • the process of activating the secondary carrier is less dependent on the SSB, and the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the activation process of the secondary carrier and reduces the delay of the activation process of the secondary carrier.
  • the terminal device cannot activate the secondary carrier according to the temporary reference signal, it can continue to activate the secondary carrier according to the reference signal such as SSB, which provides more choices for the activation of the secondary carrier and improves the activation success rate of the secondary carrier.
  • determining whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device includes: when the carrier aggregation mode of the terminal device is in-band carrier aggregation Next, if the difference between the transmit power of the first secondary carrier and the transmit power of the active carrier of the terminal device is less than or equal to a first threshold, the AGC of the first secondary carrier is not adjusted.
  • the carrier aggregation mode of the terminal equipment is in-band carrier aggregation, and the difference between the transmit power of the UE on the first secondary carrier and the transmit power of the UE on the activated carrier is less than or equal to the first threshold, it indicates that the UE If the difference between the transmit power on the first secondary carrier and the activated carrier is not large, the AGC on the activated carrier can also be used for the first secondary carrier, so in this case, the UE may not adjust the first secondary carrier AGC to simplify the activation process of the first secondary carrier.
  • determining whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device includes: when the carrier aggregation mode of the terminal device is in-band carrier aggregation If the difference between the transmit power of the first secondary carrier and the transmit power of the active carrier of the terminal equipment is greater than the first threshold, and the carrier participating in the aggregation of the terminal equipment is a continuous carrier, the first the second temporary reference signal of the secondary carrier, and adjust the AGC of the first secondary carrier according to the second temporary reference signal; or, when the carrier aggregation mode of the terminal equipment is in-band carrier aggregation, if all The carrier participating in the aggregation of the terminal equipment is a continuous carrier, receives a second temporary reference signal from the first secondary carrier, and adjusts the AGC of the first secondary carrier according to the second temporary reference signal.
  • the carrier aggregation mode of the terminal equipment is in-band aggregation, and the carriers that the terminal equipment participates in the aggregation are continuous carriers, this indicates that the time difference between the signals on each carrier reaching the terminal equipment is relatively small, or the terminal equipment is not aware of the time difference between the signals on each carrier.
  • the terminal equipment can obtain the coarse timing information of the first secondary carrier according to the timing information of the primary carrier and the symbol-level timing information of the first secondary carrier, so that the terminal equipment can obtain the coarse timing information of the first secondary carrier according to the The information can correctly receive the temporary reference signal on the first secondary carrier, so in this case, the terminal device can adjust the AGC of the first secondary carrier according to the temporary reference signal on the first secondary carrier to reduce the activation of the secondary carrier time delay.
  • the carrier aggregation mode of the terminal equipment is in-band aggregation, and the carrier that the terminal equipment participates in the aggregation is a continuous carrier
  • determining whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device includes: when the carrier aggregation mode of the terminal device is in-band carrier aggregation If the difference between the transmit power of the first secondary carrier and the transmit power of the active carrier of the terminal equipment is greater than the first threshold, and the carrier participating in the aggregation of the terminal equipment is a non-consecutive carrier, receiving a signal from the first secondary carrier SSB of a secondary carrier, and adjust the AGC of the first secondary carrier according to the SSB; or, if the carrier aggregation mode of the terminal equipment is in-band carrier aggregation, if the terminal equipment participates in the aggregation
  • the carrier is a non-contiguous carrier, receives the SSB from the first secondary carrier, and adjusts the AGC of the first secondary carrier according to the SSB.
  • the carrier aggregation mode of the terminal equipment is in-band carrier aggregation, and the carriers participating in the aggregation of the terminal equipment are non-contiguous carriers, it indicates that the time difference between the signals on each carrier reaching the UE is relatively large, or, Compared with the received time difference of the signals, the coarse timing information of the first secondary carrier obtained by the terminal device based on the timing information of the primary carrier may not be accurate enough, and the terminal device may not be able to receive on the first secondary carrier according to the coarse timing information of the first secondary carrier. to a temporary reference signal from a network device. Then in this case, it is infeasible to use the temporary reference signal to adjust the AGC of the first secondary carrier.
  • the terminal device can adjust the AGC of the first secondary carrier according to other reference signals on the first secondary carrier, or in this case, the adjustment method of the AGC of the first secondary carrier is to adjust the first secondary carrier according to other reference signals.
  • the AGC of the carrier that is, the activation of the secondary carrier can be performed in various ways, thereby improving the activation success rate of the secondary carrier.
  • Other reference signals include, for example, SSB and/or channel state information reference signal (CSI-RS) and the like.
  • the carrier aggregation mode of the terminal equipment is in-band aggregation, and the carrier that the terminal equipment participates in aggregation is a non-contiguous carrier, it is also necessary to satisfy the transmission power of the first secondary carrier and the transmission power of the activated carrier of the terminal equipment.
  • the difference is greater than the first threshold, so it is necessary to adjust the AGC of the first secondary carrier to reduce the activation delay of the secondary carrier, and if the difference between the transmit power of the first secondary carrier and the transmit power of the active carrier of the terminal equipment is less than or equal to the first threshold, then, even if the carrier aggregation mode of the terminal equipment is in-band aggregation, and the carrier that the terminal equipment participates in the aggregation is a non-contiguous carrier, it can be considered not to adjust the AGC of the first secondary carrier.
  • the activation delay of the secondary carrier can be further reduced.
  • determining whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device includes: when the carrier aggregation mode of the terminal device is in-band carrier aggregation If the difference between the transmit power of the first secondary carrier and the transmit power of the active carrier of the terminal equipment is greater than a first threshold, and the timing deviation between the first secondary carrier and the active carrier of the terminal equipment is greater than the cycle Prefix (cyclic prefix, CP) duration, receiving the SSB from the first secondary carrier; adjusting the AGC of the first secondary carrier according to the SSB.
  • Prefix cyclic prefix
  • the terminal equipment needs to adjust the AGC of the first secondary carrier .
  • the timing deviation between the first secondary carrier and all activated carriers of the terminal equipment is greater than the CP duration, then no matter which activated carrier the terminal equipment obtains the coarse timing information of the first secondary carrier based on the timing information of the activated carrier, the obtained first secondary carrier
  • the coarse timing information of the carrier may not be accurate enough, so that the temporary reference signal cannot be used to adjust the AGC of the first secondary carrier.
  • the terminal equipment can adjust the timing of the first secondary carrier according to other reference signals (reference signals, RS) on the first secondary carrier.
  • RS reference signals
  • AGC that is, the activation of the secondary carrier can be performed in various ways, thereby improving the activation success rate of the secondary carrier.
  • Other RSs include, for example, SSB and/or CSI-RS and the like.
  • determining whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device includes: when the carrier aggregation mode of the terminal device is inter-band carrier aggregation Next, receive the SSB from the first secondary carrier; adjust the AGC of the first secondary carrier according to the SSB. If the carrier aggregation mode of the terminal device is the inter-band aggregation mode, this indicates that the time difference between the signals on each carrier reaching the terminal device is relatively large, or the terminal device receives a relatively large time difference for the signals on each carrier. The device needs to adjust the AGC of the first secondary carrier.
  • the coarse timing information of the first secondary carrier obtained by the terminal device according to the timing information of the primary carrier may not be accurate enough, and the terminal device may not be able to receive the information from the network device on the first secondary carrier according to the coarse timing information of the first secondary carrier.
  • Other RSs include, for example, SSB and/or CSI-RS and the like.
  • determining whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device includes: when the carrier aggregation mode of the terminal device is inter-band carrier aggregation If the difference between the transmit power of the first secondary carrier and the transmit power of the active carrier of the terminal equipment is greater than a first threshold, and the timing deviation between the first secondary carrier and the active carrier of the terminal equipment is greater than the CP duration, receive the SSB from the first secondary carrier; adjust the AGC of the first secondary carrier according to the SSB.
  • the difference between the transmit power of the first secondary carrier and the transmit power of the activated carrier of the terminal equipment can be further determined, and the timing offset of the first secondary carrier and the terminal equipment can be further determined.
  • the timing deviation of the activated carrier of the device if the difference between the transmit power of the first secondary carrier and the transmit power of the activated carrier of the terminal device is greater than the first threshold, but the timing deviation of the first secondary carrier and at least one activated carrier of the UE is less than or equal to the CP duration, then the terminal device can obtain the coarse timing information of the first secondary carrier based on the timing information of one or more activated carriers in the at least one activated carrier.
  • the terminal device can The temporary reference signal from the network device is received on the first secondary carrier, so the terminal device can adjust the AGC of the first secondary carrier according to the temporary reference signal on the first secondary carrier.
  • the adjustment method of the AGC is to adjust the AGC of the first secondary carrier according to the temporary reference signal.
  • the first secondary carrier belongs to a first frequency range.
  • the first frequency range is, for example, a low frequency range, such as FR1, or other frequency ranges.
  • a third communication method is provided, and the method can be performed by a network device, or by a circuit system, and the circuit system can realize the function of the network device.
  • the network device is an access network device, such as a base station.
  • the method includes: sending an activation command to a terminal device, where the activation command is used to instruct activation of a first secondary carrier, where the first secondary carrier is one of the secondary carriers of the terminal device; on the first secondary carrier Send an SSB to the terminal device, where the SSB is used to adjust the AGC of the first secondary carrier; and when the first condition is satisfied, send a temporary reference signal to the terminal device, where the temporary reference signal is used for all
  • the terminal equipment performs time-frequency synchronization with the first secondary carrier.
  • the secondary carrier can be activated according to the temporary reference signal, thereby reducing the dependence of the process of activating the secondary carrier on the SSB, and the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the secondary carrier.
  • the activation process of the carrier reduces the time delay of the activation process of the secondary carrier.
  • the first condition includes: starting from the completion of sending the activation command to the end of the third SMTC cycle; or, starting from the completion of sending the activation command, to the end of the first SMTC cycle The period ends; or, receiving second indication information from the terminal device, where the second indication information is used to indicate that the identification of the first secondary carrier has been completed. If the terminal device adjusts the AGC according to other reference signals, the network device may send a temporary reference signal for the terminal device to perform time-frequency synchronization under the condition that the first condition is satisfied.
  • the first condition starts from the completion of sending the activation command and ends at the end of the third SMTC cycle, so that sufficient time can be reserved for the AGC adjustment process of the terminal device and the identification process of the first secondary carrier.
  • the first condition is from the completion of sending the activation command to the end of the first SMTC cycle. This method enables the terminal device to perform time-frequency synchronization with the first secondary carrier as soon as possible, reducing the activation delay of the first secondary carrier.
  • the first condition is that the network device receives the second indication information from the UE, and the second indication information may indicate that the identification of the first secondary carrier has been completed.
  • the terminal device can send the second indication information to the network device, and after receiving the second indication information, the network device can send a temporary reference signal for the terminal device to communicate with the first secondary carrier.
  • Time-frequency synchronization so that the network device can send the temporary reference signal in time, reducing the activation delay of the secondary carrier, and the network device also sends the temporary reference signal when the terminal device needs it, which improves the utilization of the temporary reference signal and reduces the waste of resources.
  • the second indication information is an index of an SSB, or the second indication information is a scheduling request (scheduling request, SR).
  • the second indication information may be implemented by the SSB index.
  • the AGC adjustment process of the terminal device and the identification process of the first secondary carrier may be completed according to other reference signals from the network device, and the other reference signals are, for example, SSB.
  • the terminal device sends the index of the SSB to the network device, indicating that the terminal device has identified the SSB sent by the network device, so the network device can confirm that the terminal device has completed the identification of the first secondary carrier.
  • the second indication information may be implemented through SR.
  • the SR was originally used for the terminal equipment to request resources from the network equipment, and the terminal equipment notifies the network equipment that the identification of the first secondary carrier has been completed. In fact, it is also to trigger the network equipment to send a temporary RS for the terminal equipment and the first secondary carrier. Time-frequency synchronization, so the second indication information can also be regarded as an implicit request resource, so using SR as the second indication information not only reuses the SR, but also does not deviate from the original function of the SR.
  • the first secondary carrier belongs to a first frequency range.
  • the first frequency range is, for example, a low frequency range, such as FR1, or other frequency ranges.
  • a fourth communication method is provided, the method being executable by a terminal device, or by a circuit system capable of implementing the functions of the terminal device, or by a larger device including the terminal device.
  • the method includes: receiving an activation command from a network device, where the activation command is used to instruct activation of a first secondary carrier, where the first secondary carrier is one of secondary carriers of the terminal device; in a first frequency band of a second frequency range When there is at least one active carrier on the second frequency range, or when the first secondary carrier is known, the AGC of the first secondary carrier is not adjusted, or there is no activation on the first frequency band of the second frequency range carrier, and when the first secondary carrier is unknown, receive the SSB from the first secondary carrier, and adjust the AGC of the first secondary carrier according to the SSB; wherein the first frequency band is the frequency band where the first secondary carrier is located; receive a temporary reference signal from the first secondary carrier; perform time-frequency synchronization with the first secondary carrier according to the temporary reference signal.
  • the terminal device can still perform time-frequency synchronization with the first secondary carrier according to the temporary reference signal, which can be achieved to a certain extent. to reduce the activation delay of the secondary carrier.
  • a communication device in a fifth aspect, is provided.
  • the communication apparatus may be the terminal device described in any one of the first to fourth aspects above, or an electronic device (eg, a circuit system) configured in the terminal device, or a device including the terminal device of larger equipment.
  • the terminal device includes corresponding means or modules for performing the above method.
  • the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiving unit (sometimes also referred to as a transceiving module).
  • the transceiver unit is configured to receive an activation command from a network device, where the activation command is used to instruct activation of a first secondary carrier, where the first secondary carrier is one of the secondary carriers of the terminal device;
  • the processing unit is configured to determine whether to adjust the AGC of the first secondary carrier according to the measurement period of the first secondary carrier by the terminal device when the first secondary carrier is known, wherein, Adjusting the AGC of the first secondary carrier uses a temporary reference signal;
  • the transceiver unit is further configured to receive a first temporary reference signal from the first secondary carrier
  • the processing unit is further configured to perform time-frequency synchronization with the first secondary carrier according to the first temporary reference signal.
  • the transceiver unit is configured to receive an activation command from the network device, where the activation command is used to instruct to activate a first secondary carrier, where the first secondary carrier is one of the secondary carriers of the terminal device;
  • the processing unit is configured to determine whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the terminal device when the first secondary carrier is unknown; or, the processing unit, configured to If the first secondary carrier is unknown, receive first indication information from the network device through the transceiver unit, where the first indication information is used to indicate that the AGC of the first secondary carrier is not to be adjusted, or Indicate the adjustment mode of the AGC of the first secondary carrier;
  • the transceiver unit is further configured to receive a first temporary reference signal from the first secondary carrier
  • the processing unit is further configured to perform time-frequency synchronization with the first secondary carrier according to the first temporary reference signal.
  • the transceiver unit is configured to receive an activation command from the network device, where the activation command is used to instruct to activate a first secondary carrier, where the first secondary carrier is one of the secondary carriers of the terminal device;
  • the processing unit is configured to not adjust the first secondary carrier when there is at least one activated carrier on the first frequency band of the second frequency range, or when the first secondary carrier is known.
  • AGC or, the processing unit, configured to receive a signal from the first secondary carrier through the transceiver unit when the carrier is not activated on the first frequency band of the second frequency range and the first secondary carrier is unknown
  • the SSB the processing unit is further configured to adjust the AGC of the first secondary carrier according to the SSB; wherein, the first frequency band is the frequency band where the first secondary carrier is located;
  • the transceiver unit further configured to receive a temporary reference signal from the first secondary carrier
  • the processing unit is further configured to perform time-frequency synchronization with the first secondary carrier according to the temporary reference signal.
  • the communication apparatus includes: a processor, coupled to the memory, for executing instructions in the memory, so as to implement the method executed by the terminal device in any one of the first to fourth aspects above.
  • the communication device further includes other components, such as an antenna, an input and output module, an interface, and the like. These components may be hardware, software, or a combination of software and hardware.
  • a communication device is provided.
  • the communication apparatus may be the network device described in any one of the first aspect to the fourth aspect.
  • the communication device has the function of the above-mentioned network device.
  • the network equipment is, for example, a base station, or a baseband device in a base station.
  • the communication device includes a baseband device and a radio frequency device.
  • the communication apparatus includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module).
  • the transceiver unit is configured to send an activation command to the terminal device, where the activation command is used to instruct to activate a first secondary carrier, where the first secondary carrier is one of the secondary carriers of the terminal device;
  • the transceiver unit is further configured to send an SSB to the terminal device on the first secondary carrier, where the SSB is used to adjust the AGC of the first secondary carrier;
  • the transceiver unit is further configured to send a temporary reference signal to the terminal device when the first condition is satisfied, where the temporary reference signal is used for the terminal device to perform time-frequency synchronization with the first secondary carrier (or,
  • the processing unit is configured to determine that the first condition is met; the transceiver unit is configured to send a temporary reference signal to the terminal device, where the temporary reference signal is used for the terminal device to perform time-frequency synchronization with the first secondary carrier ).
  • the communication apparatus includes: a processor, coupled with a memory, for executing instructions in the memory, so as to implement the method performed by the network device in any one of the first to fourth aspects above.
  • the communication device further includes other components, such as an antenna, an input and output module, an interface, and the like. These components may be hardware, software, or a combination of software and hardware.
  • a computer-readable storage medium is provided, and the computer-readable storage medium is used to store a computer program or instruction, which, when executed, enables the method performed by the terminal device or the network device in the above aspects to be implemented .
  • a computer program product comprising instructions which, when run on a computer, cause the methods of the above aspects to be implemented.
  • the secondary carrier can be activated according to the temporary reference signal, thereby reducing the dependence of the process of activating the secondary carrier on the SSB, and the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the secondary carrier.
  • the activation process of the carrier reduces the time delay of the activation process of the secondary carrier.
  • FIG. 1A is a schematic diagram of a communication system according to an embodiment of the application.
  • 1B is a flowchart of a secondary carrier activation process
  • FIG. 2A is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2B is a schematic diagram of another application scenario of an embodiment of the present application.
  • FIG. 2C is a schematic diagram of another application scenario of an embodiment of the present application.
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of the present application.
  • 4A is a flowchart of another communication method provided by an embodiment of the present application.
  • 4B is a schematic diagram of secondary carrier activation according to SSB
  • 4C is a schematic diagram of secondary carrier activation according to a temporary reference signal in an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a network device according to an embodiment of the present application.
  • the technologies provided in the embodiments of the present application can be applied to the communication system 10 shown in FIG. 1A .
  • the communication system 10 includes one or more communication apparatuses 30 (for example, terminal equipment), and the one or more communication apparatuses 30 pass through one or more communication apparatuses 30 .
  • Each access network device 20 is connected to one or more core network devices to implement communication between multiple communication devices.
  • the communication system may, for example, support 2G, 3G, 4G, or 5G (sometimes also referred to as new radio, NR) access technology communication systems, wireless fidelity (Wi-Fi) systems, third-generation partners
  • 3GPP 3rd generation partnership project
  • a communication system that supports the fusion of multiple wireless technologies or a future-oriented evolution system.
  • a terminal device is a device with a wireless transceiver function, which may be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a built-in wireless device in the above-mentioned device). , communication modules, modems, or circuitry, etc.).
  • the terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, such as but not limited to the following scenarios: cellular communication, device-to-device communication (device-to-device, D2D), vehicle-to-everything (vehicle to everything, V2X), machine-to-machine/machine-type communications (M2M/MTC), Internet of things (internet of things, IoT), virtual reality (virtual reality, VR) , Augmented reality (AR), industrial control (industrial control), unmanned driving (self driving), telemedicine (remote medical), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation , terminal equipment for smart city, drone, robot and other scenarios.
  • cellular communication device-to-device communication
  • vehicle-to-everything vehicle to everything, V2X
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • virtual reality virtual reality
  • AR Augmented reality
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • UE user equipment
  • the terminal equipment may sometimes be referred to as user equipment (UE), a terminal, an access station, a UE station, a remote station, a wireless communication device, a user equipment, or the like.
  • UE user equipment
  • the network devices in the embodiments of the present application include, for example, access network devices and/or core network devices.
  • the access network device is a device with a wireless transceiver function, and is used to communicate with the terminal device.
  • the access network equipment includes, but is not limited to, a base transceiver station (BTS), a Node B (Node B), an evolved Node B (eNodeB/eNB, or gNodeB/gNB), a transceiver point (transmission reception point, TRP), 3rd generation partnership project (3GPP) subsequent evolution base station, wireless fidelity (wireless fidelity, WiFi) system access node, wireless relay node, wireless backhaul node, etc.
  • BTS base transceiver station
  • Node B Node B
  • eNodeB/eNB evolved Node B
  • gNodeB/gNB gNodeB/gNB
  • TRP transmission reception point
  • 3GPP 3rd generation partnership project
  • the base station may be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, and the like. Multiple base stations may support the aforementioned networks of the same access technology, or may support the aforementioned networks of different access technologies.
  • a base station may contain one or more co-sited or non-co-sited transmission and reception points.
  • the network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the network device can also be a server, a wearable device, or a vehicle-mounted device.
  • a network device in a vehicle to everything (V2X) technology can be a road side unit (RSU).
  • the following description will be given by taking the access network device as a base station as an example.
  • the multiple network devices in the communication system may be base stations of the same type, or may be base stations of different types.
  • the base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station.
  • a terminal device can communicate with multiple base stations in different access technologies.
  • the core network equipment is used to implement functions such as mobility management, data processing, session management, policy and charging.
  • the names of devices implementing core network functions in systems with different access technologies may be different, which are not limited in this embodiment of the present application.
  • the core network equipment includes: an access and mobility management function (AMF), a session management function (SMF), or a user plane function (UPF) Wait.
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • the communication device for implementing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a circuit system, and the device may be installed in the network device.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
  • the number of nouns means “singular nouns or plural nouns", that is, “one or more”. "At least one” means one or more, and “plurality” means two or more. "And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/" generally indicates that the associated objects are an "or” relationship. For example, A/B, means: A or B.
  • At least one item(s) below or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c Can be single or multiple.
  • first and second mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, application scenario, priority, or importance of multiple objects. degree, etc.
  • first duration and the second duration may be the same duration or different durations, and this name does not indicate the difference in length, priority, application scenario or importance of the two durations .
  • the UE can aggregate multiple carriers, and the aggregated carriers include a primary carrier and one or more secondary carriers. If the network device wants to configure the UE to work on a certain secondary carrier, it needs to instruct the UE to activate the secondary carrier. Referring to FIG. 1B below, the activation process of the secondary carrier is introduced.
  • the base station sends an activation command to the UE, and the UE receives the activation command from the base station.
  • the activation command may instruct to activate a certain secondary carrier, for example, instruct to activate secondary carrier 1 .
  • the UE adjusts the AGC of the secondary carrier 1 .
  • the UE may receive the SSB on the secondary carrier 1 and adjust the AGC of the secondary carrier 1 according to the received SSB. If the UE has not identified the secondary carrier 1, or although the UE has identified the secondary carrier 1, but the measurement cycle (measurement cycle, MC) of the UE on the secondary carrier 1 is greater than or equal to 160ms, the UE needs to perform S102, otherwise the UE needs to perform S102. There is no need to execute S102.
  • the measurement cycle measurement cycle, MC
  • the UE detects the secondary carrier 1, or the UE identifies the secondary carrier 1.
  • This procedure may be referred to as a cell identification procedure, or a carrier identification procedure.
  • the UE detects the secondary carrier 1, for example, including detecting the primary synchronization signal (primary synchronization signal, PSS) and/or the secondary synchronization signal (secondary synchronization signal, SSS) of the secondary carrier 1.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the identity number (identity, ID) of the secondary carrier 1 can be obtained based on the SSB, and the symbol-level timing information of the secondary carrier 1 can be obtained.
  • the UE may receive the SSB on the secondary carrier 1, and obtain the identity number (ID) of the secondary carrier 1 according to the SSB, and obtain the timing information at the symbol level of the secondary carrier 1, so as to complete the identification of the secondary carrier 1.
  • the timing information at the symbol level can be understood as the boundary timing of an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol (symbol).
  • OFDM orthogonal frequency division multiplexing
  • the identification process of the secondary carrier may further include other steps, which are not limited in this embodiment of the present application. Wherein, if the UE has not yet identified the secondary carrier 1, S103 may be performed, otherwise the UE does not need to perform S103.
  • the UE sends the layer 1 reference signal received power (L1-RSRP) of the secondary carrier 1 to the network device, and the corresponding network device receives the L1-RSRP from the UE.
  • L1-RSRP layer 1 reference signal received power
  • RSRP is the reference signal receiving power (reference signal receiving power).
  • S104 may be performed, otherwise, it is not necessary to perform S104.
  • the network device sends a transmission configuration indication (TCI) activation command to the UE, and accordingly, the UE waits for and receives the TCI activation command from the network device.
  • TCI activation command may be used to receive a physical downlink control channel (PDCCH) and/or a physical downlink shared channel (PDSCH) through the secondary carrier 1 after the secondary carrier 1 is activated.
  • PDCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • S105 can be executed, otherwise, it is not necessary to execute S105. Alternatively, even if the secondary carrier belongs to FR1, S105 may be performed in a corresponding situation.
  • the UE performs time-frequency synchronization with the secondary carrier 1, or in other words, the UE performs precise timing with the secondary carrier 1.
  • the UE may receive the SSB on the secondary carrier 1, and perform time-frequency synchronization with the secondary carrier 1 according to the received SSB.
  • the secondary carrier 1 belongs to FR2, and the secondary carrier 1 is not configured with SSB, S106 does not need to be performed, otherwise, S106 needs to be performed.
  • the UE measures the secondary carrier 1 to obtain channel state information (channel state information, CSI) or channel quality indication (channel quality indication, CQI).
  • channel state information channel state information, CSI
  • channel quality indication channel quality indication, CQI
  • the UE may receive SSB on secondary carrier 1 and measure the received SSB to obtain CSI or CQI.
  • the UE sends the CSI to the network device, and correspondingly, the network device receives the CSI from the UE.
  • the UE sends the CQI to the network device, and correspondingly, the network device receives the CQI from the UE.
  • the network device After the network device receives the CSI or CQI from the UE, it can determine that the secondary carrier 1 has been activated.
  • S102, S103 and S106 are all performed based on SSB, so the execution time of these steps is related to the transmission period of SSB or the period of SMTC.
  • the transmission period of the SSB is generally relatively large, usually greater than or equal to 20 ms, which leads to a relatively large activation delay of the secondary carrier, and this problem cannot be solved at present.
  • the secondary carrier can be activated according to the temporary reference signal, thereby reducing the dependence of the process of activating the secondary carrier on the SSB, and the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the secondary carrier.
  • the activation process of the carrier reduces the time delay of the activation process of the secondary carrier.
  • the embodiment of the present application sets a method of activating the secondary carrier according to the temporary reference signal, that is, both the network device and the terminal device can clearly determine under what circumstances the temporary reference signal should be applied, and how to apply the temporary reference signal, which regulates the network device and the terminal device.
  • the behavior of the terminal device achieves the common cognition of the terminal device and the network device.
  • FIG. 2A shows a communication network architecture in the communication system 10 provided by the embodiment of the present application, and the embodiments shown in FIG. 3 or FIG. 4A provided later can be applicable to this architecture.
  • the network device included in FIG. 2A is, for example, the access network device 20 included in the communication system 10
  • the terminal device included in FIG. 2A is, for example, the communication device 30 included in the communication system 10 .
  • the network device and the terminal device can communicate.
  • FIG. 2B shows another communication network architecture in the communication system 10 provided by the embodiment of the present application.
  • the communication system includes a core network (new core, CN) and a radio access network (radio access network, RAN).
  • the network device (eg, base station) in the RAN is, for example, the access network device 20 in the communication system 10 .
  • Network equipment in the RAN includes baseband devices and radio frequency devices.
  • the baseband device may be implemented by one or more nodes, and the radio frequency device may be implemented independently from the baseband device, or may be integrated into the baseband device, or partially remote and partially integrated in the baseband device.
  • the network equipment in the RAN may include CUs and DUs, and if there are multiple DUs, the multiple DUs may be centrally controlled by one CU.
  • the CU and DU can be divided according to the protocol layer functions of the wireless network they have. For example, the functions of the packet data convergence protocol (PDCP) layer and the above protocol layers are set in the protocol layers below the CU and PDCP, such as the wireless link.
  • the functions of the channel control (radio link control, RLC) layer and the media access control (media access control, MAC) layer are set in the DU. It should be noted that this protocol layer division is only an example, and may also be divided in other protocol layers.
  • the radio frequency device may be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited in this embodiment of the present application.
  • FIG. 2C shows another communication network architecture in the communication system 10 provided by the embodiment of the present application.
  • the control plane (CP) and user plane (UP) of the CU can also be separated and divided into different entities for implementation, namely the control plane CU entity (CU-CP entity). ) and the user plane CU entity (CU-UP entity).
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU.
  • the DU may directly encapsulate the signaling at the protocol layer and transparently transmit it to the terminal device or CU without parsing the signaling.
  • the CU is classified as a network device on the RAN side.
  • the CU can also be classified as a network device on the CN side, which is not limited in this embodiment of the present application.
  • the two concepts of "carrier” and “cell” can be interchanged.
  • a “secondary carrier” may also be referred to as a "secondary cell”
  • a “primary carrier” may also be referred to as a "primary cell”.
  • the temporary reference signal may satisfy any combination of one or more of the following: 1.
  • the temporary reference signal is, for example, an aperiodic signal, or may also be a periodic signal. If the temporary reference signal is a periodic signal, then optionally, the transmission period of the temporary reference signal can be smaller than the transmission period of the SSB; 2.
  • the temporary reference signal can be used for the activation of the secondary carrier; 3.
  • the temporary reference signal can be used for the activation of the secondary carrier Time-frequency tracking and/or AGC adjustment in the process; 4.
  • the temporary reference signal can be triggered by a network device, such as an access network device. 5. After tracking, the temporary reference signal is no longer used in the secondary carrier process.
  • an existing signal can be used as the temporary reference signal, because the existing reference signal itself has other functions, and the embodiment of the present application also uses the signal to complete the function of the temporary reference signal, so the embodiment of the present application uses the signal as the temporary reference signal.
  • the reference signal provided by the embodiment is called a "temporary" reference signal, because the signal may be "temporary" as the reference signal of the embodiment of the present application.
  • a new signal can also be defined by the protocol, and the signal can be used as a temporary reference signal. If this is the case, the name of "temporary reference signal" may also be changed, for example, it can be changed to "specific (specific) reference signal” etc.
  • temporary reference signal is only an example, and the name does not represent a limitation on the signal itself.
  • “temporary reference signal” can also have other names, for example, it can also be called It is a “reference signal”, or it can be called a “dedicated reference signal”, or it can be called a “first reference signal” or “A reference signal”, etc.
  • the "temporary reference signal” is referred to as the "first reference signal”
  • the “first temporary reference signal” that will appear later can also be renamed “temporary reference signal 1”
  • the “first temporary reference signal” that will appear later can also be renamed "temporary reference signal 1"
  • the second temporary reference signal may also be renamed as “temporary reference signal 2", etc., so as not to make the name unclear.
  • the UE if the first secondary carrier is a carrier of FR1, the UE considers the first secondary carrier to be a known secondary carrier when the first secondary carrier satisfies the following conditions: otherwise, The UE considers the first secondary carrier to be an unknown secondary carrier.
  • the UE In a period of time before receiving the activation command, the UE has reported the valid measurement result of the first secondary carrier.
  • the reference signal of the first secondary carrier measured by the UE always maintains a detectable condition, and the detectable condition may include at least one of the following: The signal to interference plus noise ratio (SINR) of the reference signal is greater than or equal to the first preset value, and the interference power spectral density of the reference signal of the first secondary carrier is greater than or equal to the second preset value, or, the first The received power of the reference signal of the secondary carrier is greater than or equal to the third preset value or the like.
  • SINR Signal to interference plus noise ratio
  • the UE considers the first secondary carrier is a carrier in frequency range 2 (frequency range 2, FR2), when the first secondary carrier satisfies the following conditions, the UE considers the first secondary carrier is a known secondary carrier; otherwise, the UE considers the first secondary carrier to be an unknown secondary carrier.
  • frequency range 2 frequency range 2, FR2
  • the UE has reported valid L3-RSRP measurements of reference signals within a period of time before receiving the latest TCI activation command and semi-static CSI-RS activation command.
  • the UE receives the activation signaling of the first secondary carrier after the L3-RSRP report, and the activation signaling is not later than the TCI received by the UE.
  • the SSB reported by the UE always maintains a detectable condition during the period from the L3-RSRP reporting to the effective CQI reporting (for the detectable condition, please refer to the previous section), and the TCI is configured based on one of the most recently reported SSBs.
  • a communication method provided by an embodiment of the present application is introduced.
  • the UE has identified the first secondary carrier to be activated (or in other words, the first secondary carrier is known).
  • the first secondary carrier is known.
  • FIG. 1B For the process of identifying the first secondary carrier by the UE, reference may be made to the introduction of the process shown in FIG. 1B .
  • the network device sends an activation command to the UE, and the UE receives the activation command from the network device.
  • the activation command may instruct to activate a certain secondary carrier, for example, instruct to activate the first secondary carrier, where the first secondary carrier is one of the aggregated carriers of the terminal device.
  • the first secondary carrier belongs to, for example, a first frequency range, and the first frequency range is, for example, FR1.
  • the network device may send the activation command to the UE.
  • the activation command is, for example, sent through a media access control (media access control, MAC) control element (control element, CE), or sent through downlink control information (downlink control information, DCI), or can also be sent in other ways.
  • media access control media access control, MAC
  • CE control element
  • DCI downlink control information
  • the AGC of the secondary carrier saves the power consumption of the UE and simplifies the activation process of the secondary carrier.
  • the first measurement period may be specified by a protocol, or may be configured by a network device or the like. For example, the first measurement period is 160 ms, or other values may also be used.
  • the activation duration of the secondary carrier is equal to T HARQ +T activation_time +T CSI_Reporting , where T HARQ represents the duration required for S101 in FIG. 1B , that is, it represents the time required for the UE to receive and process the activation command from the base station If the activation command fails to be sent, it may involve retransmission, so the required time is represented by T HARQ .
  • T CSI_Reporting represents the time required for S108 in FIG. 1B , that is, represents the time required for the UE to measure the CSI and transmit the CSI to the base station.
  • T activation_time represents the total time required for other steps except S101 and S108 in FIG.
  • T activation_time can also be called the activation of the secondary carrier duration.
  • the measurement period of the UE for the first secondary carrier is less than or equal to the first measurement period, the AGC of the first secondary carrier is not adjusted.
  • T activation_time (T activation_time at this time indicates the actual activation of the first secondary carrier duration) may be determined according to the first duration, for example, the first duration is the duration for the UE to wait for and obtain (or receive) the first complete temporary RS burst set (burst) from the first secondary carrier.
  • T activation_time may satisfy the following relationship:
  • T first_TempRS represents the first duration. Equation 1 is just an example, for example, the value 5 in Equation 1 can also be replaced with other values, or can also be replaced with other functions, or T first_TempRS +5 in Equation 1 can also be replaced with f(T first_TempRS ), f (x) represents a function with x as a variable, which may be an addition function or a function of other computing forms. In this case, the activation duration of the first secondary carrier is short, which can improve the activation efficiency of the secondary carrier.
  • the AGC of the first secondary carrier can be adjusted. If the SSB is used to adjust the AGC, and the SSB is sent periodically, the time required to adjust the AGC is related to the sending period of the SSB or the SMTC period. However, the transmission period of the SSB is generally relatively large, usually greater than or equal to 20 ms, which leads to a relatively large activation delay of the secondary carrier. Therefore, the embodiment of the present application proposes that the AGC can be adjusted through a temporary RS.
  • the temporary RS can be an aperiodic signal, for example, the temporary RS can be sent when the UE needs it, so that the activation time of the secondary carrier does not depend on the transmission period of the reference signal, and the activation delay of the secondary carrier is reduced.
  • the temporary RS may be an aperiodic signal, for example, the transmission period of the temporary RS may be less than or equal to the transmission period of the SSB, which can also reduce the activation delay of the secondary carrier.
  • a tracking reference signal may be used as the temporary RS.
  • TRS tracking reference signal
  • CSI-RS channel state information reference signal
  • FR2 frequency range
  • TRS can occupy 4 channel state information (channel state information reference signal, CSI-RS) resources in 2 time slots (slots); in FR2, TRS can occupy 2 4 CSI-RS resources in 1 slot, or 2 CSI-RS resources in 1 slot may be occupied.
  • other signals may also be used as the temporary RS, which is not limited in this embodiment of the present application.
  • the UE can obtain the symbol-level timing information of the first secondary carrier by identifying the first secondary carrier.
  • the timing information of the primary carrier is known to the UE, wherein the timing information of the primary carrier includes the system frame number (SFN) of the primary carrier. boundaries, slot boundaries, and OFDM symbol boundaries, etc.
  • SFN system frame number
  • the UE can derive all the timing information of the secondary carrier through the timing information of the primary carrier and the symbol-level timing information of the secondary carrier.
  • the timing information of the secondary carrier derived by the UE according to the timing information of the primary carrier and the symbol-level timing information of the secondary carrier may be called coarse timing information of the secondary carrier because it may not be very accurate.
  • the UE may derive the coarse timing information of the first secondary carrier according to the timing information of the primary carrier and the symbol-level timing information of the first secondary carrier.
  • the network device sends the second temporary RS on the first secondary carrier
  • the UE can also correctly receive the second temporary RS from the first secondary carrier (or, in other words, on the first secondary carrier).
  • the second temporary RS from the network device is received on the carrier), so that the UE can use the second temporary RS to adjust the AGC of the first secondary carrier.
  • the UE adjusts the AGC of the first secondary carrier according to the temporary RS, for example, the UE adjusts the level gain according to the received signal power of the temporary RS, so that the output signal of the UE maintains an appropriate amplitude .
  • the embodiment of the present application may adjust the AGC of the first secondary carrier to improve the accuracy of the AGC of the first secondary carrier.
  • the AGC of the first secondary carrier can be adjusted according to the temporary RS, which reduces the dependence on the transmission period of the SSB, and is beneficial to improve the activation efficiency of the secondary carrier.
  • the embodiments of the present application provide several methods for adjusting the AGC, and the following examples are introduced.
  • the adjustment of the AGC is related to other carriers in the aggregated carrier of the UE except the first secondary carrier, or in other words, the transmission time of the temporary RS on the first secondary carrier is required to be the same as that of the active carrier in the aggregated carrier of the UE.
  • the transmission time of the RS is aligned. There may be one or more active carriers among the carriers that the UE participates in aggregation It can be considered that the network device is required to send reference signals on multiple carriers at the same time.
  • the alignment of the transmission times of the signals on the two carriers means, for example, that the transmission times of the signals on the two carriers are the same. For example, if two signals are sent in the same time slot (slot), it is considered that the transmission time of the two signals is the same; for another example, if the two signals are sent in the same OFDM symbol, the transmission time of the two signals is considered to be the same.
  • the RS on the activated carrier of the UE includes, for example, one or more of the following: CSI-RS, SSB, or temporary RS.
  • the UE may have one or more activated carriers, and the RS on one of the activated carriers may include CSI-RS, or include SSB, or include temporary RS, or include CSI-RS and SSB, or include SSB and temporary RS , or including CSI-RS and temporary RS, or including CSI-RS, SSB and temporary RS.
  • the existing protocol requires that for FR1, if the carrier aggregation mode of the UE is in-band aggregation mode, all activated carriers and carriers to be activated in the in-band aggregation need to send SSBs in the same time slot (slot), so that the UE The AGC can be adjusted according to the SSB received on each carrier; the same is true for FR2. If the UE's carrier aggregation mode is in-band aggregation mode, all the active and to-be-activated carriers in the in-band aggregation need to be in the same slot. The SSB is sent so that the UE can adjust the AGC based on the SSB received on each carrier.
  • the transmission time of the temporary RS on the first secondary carrier is aligned with the transmission time of the RS on the activated carrier in the aggregated carrier of the UE, so that the technical solutions of the embodiments of the present application can better match the Compatible with existing protocols.
  • the time at which the UE receives the reference signals on each carrier will be similar, so the UE can adjust the AGC based on the recently received reference signals, so that the adjustment of the AGC is more efficient.
  • the adjusted AGC can be used for each carrier that the UE participates in aggregation.
  • Mode 2 The adjustment of the AGC is irrelevant (or irrelevant) to other carriers except the first secondary carrier in the aggregated carrier of the UE, or in other words, it is not required that the transmission time of the temporary RS on the first secondary carrier is not related to that of the UE.
  • the transmission times of the RSs on the active carriers in the aggregated carriers are aligned.
  • the transmission time of the temporary RS on the first secondary carrier must be aligned with the transmission time of the RS on the activated carrier in the aggregated carrier of the UE, then the network device sends the reference signal on each carrier when sending the reference signal.
  • the transmission time of the temporary RS on the first secondary carrier can be aligned with the transmission time of the RS on the activated carrier in the aggregated carrier of the UE, or it is not necessary to align the transmission time of the temporary RS on the first secondary carrier with the UE.
  • the transmission times of the RSs on the activated carriers in the aggregated carriers are aligned. As for whether they are aligned, for example, the network device can determine them according to factors such as actual requirements.
  • the adjustment process of AGC is hysteretic. If the transmission time of the temporary RS on the first secondary carrier is not aligned with the transmission time of the RS on the active carrier in the aggregated carrier of the UE, the UE may If the reception times of the signals are inconsistent, the UE can temporarily store the reference signals received first, and then adjust the AGC based on the received reference signals after the reference signals on each carrier have been received, so that the adjusted AGC can also be used for The UE participates in the aggregated carriers.
  • the UE can also adjust the AGC. If the second mode is adopted, the restriction on the network device is reduced without increasing the computational complexity of the UE, which brings greater implementation flexibility to the network device.
  • T activation_time (T activation_time at this time represents the actual activation duration of the first secondary carrier) can be obtained according to the second duration.
  • the definition of the second duration will be different in Mode 1 and Mode 2. The following examples will be introduced.
  • the second duration may be the maximum value of the third duration and the fourth duration.
  • the third duration is, for example, the duration that the UE waits and obtains (or receives) the first complete temporary RS burst from the first secondary carrier
  • the fourth duration is, for example, the UE waits and obtains (or, receives) ) the duration of the first complete RS burst from the second carrier, for example, the second carrier including the active carrier of the UE.
  • the fourth duration is the duration for which the UE waits and acquires (or receives) the first complete RS burst from this one carrier.
  • the duration of the UE waiting on these multiple carriers and obtaining the first complete RS burst may be the same or different, and the fourth duration is, for example, among these durations.
  • the active carriers of the UE include carrier 1 and carrier 2, the duration of the UE waiting for and obtaining the first complete RS burst from carrier 1 is duration 1, and the UE waiting for and obtaining the first complete RS burst from carrier 2 The duration is duration 2, and duration 1 is less than duration 2, then the fourth duration is duration 2.
  • T activation_time may satisfy the following relationship:
  • T activation_time max ⁇ T first_TempRS ,T first_RS ⁇ +T TempRS +5 (Equation 2)
  • T first_TempRS represents the third time length
  • T first_RS represents the fourth time length
  • max ⁇ x,y ⁇ represents the maximum value of x and y
  • T first_RS ⁇ represents the second time length
  • T TempRS represents the UE Wait and obtain the duration of a complete temporary RS burst from the first secondary carrier.
  • the third duration indicates that the UE waits and obtains (or receives) the first complete temporary RS burst from the first secondary carrier
  • T TempRS indicates that the UE waits and obtains.
  • the duration of a complete temporary RS burst from the first secondary carrier that is, the third duration emphasizes "the first complete temporary RS burst", while T TempRS represents "a complete temporary RS burst", and It is not emphasized that this temporary RS burst is the first.
  • formula 2 is just an example, for example, the value 5 in formula 2 can also be replaced with other values, or can also be replaced with other functions, or max ⁇ T first_TempRS ,T first_RS ⁇ +T TempRS +5 in formula 2 can also be replaced with f(x) represents a function with x as a variable, which may be an addition function or a function of other forms of calculation.
  • the second duration is, for example, the duration that the UE waits for and obtains (or in other words, receives) the first complete temporary RS burst from the first secondary carrier. That is to say, in the second mode, the receiving process of reference signals on other carriers may not be considered, and the second duration can be determined according to the receiving process of the temporary RS on the first secondary carrier by the UE, which makes the second duration The process of determining the duration is simpler.
  • T activation_time may satisfy the following relationship:
  • T activation_time T first_TempRS + T TempRS +5 (Equation 3)
  • T first_TempRS represents the second duration
  • T TempRS for the explanation of T TempRS , please refer to the introduction of formula 2.
  • Equation 3 is just an example, for example, the value 5 in Equation 3 can also be replaced with other values, or can also be replaced with other functions, or T first_TempRS +T TempRS +5 in Equation 3 can also be replaced with f( T first_TempRS , T TempRS ), f(x) represents a function with x as a variable, and the function may be an addition function or a function of other calculation forms.
  • Mode 3 The UE sends capability information to the network device, so as to indicate the selection of Mode 1 or Mode 2 through the capability information.
  • the UE may also send capability information to the network device, and correspondingly, the network device may receive the capability information from the UE.
  • the capability information may indicate that the adjustment of the AGC is related to other carriers than the first secondary carrier (or the capability information may request that reference signals be sent at the same time for each carrier configured for the UE), or the capability information may indicate The adjustment of the AGC is independent of carriers other than the first secondary carrier (alternatively, the capability information may indicate that it is not required to transmit reference signals at the same time for each carrier configured for the UE).
  • the UE may send the capability information to the network device after receiving the activation command of S301, or the UE may also send the capability information to the network device before receiving the activation command.
  • the embodiments of the present application do not have any time to send the capability information. make restrictions.
  • the network device After the network device receives the capability information, if the capability information indicates that the adjustment of the AGC is related to other carriers except the first secondary carrier, or if the capability information requests the same time for sending reference signals for each carrier configured for the UE, then the network The device may process in the foregoing manner 1, that is, the time when the network device sends the temporary RS on the first secondary carrier is the same as the time when the network device sends the RS on the active carrier of the UE. However, if the capability information indicates that the adjustment of the AGC has nothing to do with other carriers except the first secondary carrier, or indicates that it is not required to send the reference signal at the same time for each carrier configured for the UE, the network device can follow the second method described above. Processing, that is, the time when the network device sends the temporary RS on the first secondary carrier and the time when the network device sends the RS on the active carrier of the UE may be the same or different.
  • the UE's AGC adjustment process is more in line with the UE's capabilities. For example, some UEs do not support mode 2, and such UEs can indicate through the capability information that the AGC adjustment is related to other carriers except the first secondary carrier. , so that the network device can process according to the first method, and try to avoid the failure of the UE to adjust the AGC due to the fact that the transmission process of the reference signal by the network device does not meet the capability requirements of the UE.
  • the network device sends the first temporary RS on the first secondary carrier.
  • the UE receives the first temporary RS from the first secondary carrier (or in other words, the UE receives the first temporary RS from the network device on the first secondary carrier). RS).
  • the UE performs time-frequency synchronization with the first secondary carrier according to the first temporary RS.
  • that the UE performs time-frequency synchronization with the first secondary carrier can also be understood as performing time-frequency tracking or precise timing between the UE and the first secondary carrier, or it can be understood that the UE obtains the precise timing information of the first secondary carrier.
  • the UE can perform S303 and S304; if the UE needs to adjust the AGC, the UE can adjust the AGC first, and then perform S303 and S304 after adjusting the AGC.
  • the network device sends the first temporary RS on the first secondary carrier. After obtaining the coarse timing information of the first secondary carrier, the UE can also correctly receive the first temporary RS from the first secondary carrier, so that the UE can use the first temporary RS.
  • the RS is time-frequency synchronized with the first secondary carrier.
  • the UE performs time-frequency synchronization with the first secondary carrier using the temporary RS, which can be considered as obtaining precise timing information of the first secondary carrier.
  • the first temporary RS and the aforementioned second temporary RS may be the same signal or different signals.
  • the activation process of the first secondary carrier may need to perform some other steps, for which reference may be made to the introduction of the process shown in FIG. 1B .
  • the UE may assist in activating the secondary carrier according to the temporary RS.
  • the UE may adjust the AGC according to the temporary RS, and may also perform time-frequency synchronization with the first secondary carrier according to the temporary RS, which reduces the number of activated secondary carriers. If the process depends on SSB, the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the activation process of the secondary carrier and reduces the time delay of the activation process of the secondary carrier.
  • the embodiment shown in FIG. 3 describes the situation that the UE has identified the secondary carrier to be activated.
  • FIG. 4A introduce another communication method provided by the embodiment of the present application. In this method, the UE does not Identify the first secondary carrier to be activated (or in other words, the first secondary carrier is unknown).
  • the network device sends an activation command to the UE, and the UE receives the activation command from the network device.
  • the activation command may instruct to activate a certain secondary carrier, for example, instruct to activate the first secondary carrier, where the first secondary carrier is one of the aggregated carriers of the terminal device.
  • the first secondary carrier belongs to, for example, a first frequency range, and the first frequency range is, for example, FR1.
  • the UE determines whether to adjust the AGC of the first secondary carrier, or the UE determines an adjustment method of the AGC of the first secondary carrier (or in other words, the UE determines to adjust the AGC of the first secondary carrier, and determines the adjustment of the AGC of the first secondary carrier Way).
  • the UE may determine to adjust the AGC of the first secondary carrier according to the instruction of the network device, or determine an adjustment manner of the AGC of the first secondary carrier.
  • the network device sends the first indication information to the UE. Accordingly, the UE receives the first indication information from the network device.
  • the first indication information may indicate that the AGC of the first secondary carrier is not to be adjusted.
  • the first indication information may indicate to adjust the AGC of the first secondary carrier, and the UE determines to adjust the AGC of the first secondary carrier according to the first indication information; or, the first indication information may Indicates the AGC adjustment method of the first secondary carrier (for example, the adjustment method of the AGC of the first secondary carrier is to adjust the AGC of the first secondary carrier according to the temporary RS, or the adjustment method of the AGC of the first secondary carrier is to adjust the first secondary carrier according to the SSB.
  • the UE can determine the adjustment method of the AGC of the first secondary carrier according to the first indication information, in fact, the UE also implicitly determines the AGC that needs to be adjusted for the first secondary carrier according to the first indication information; If the indication information indicates the adjustment of the first secondary carrier and the adjustment method of the AGC of the first secondary carrier, the UE can determine the adjustment of the first secondary carrier according to the first indication information, and determine the adjustment method of the AGC of the first secondary carrier.
  • the first indication information may be carried in the activation command of S401, or the first indication information may also be sent by other messages than the activation command.
  • the UE may determine by itself whether to adjust the AGC of the first secondary carrier, or the UE may determine the adjustment method of the AGC of the first secondary carrier by itself, for example, the UE may determine whether to adjust the AGC of the first secondary carrier according to the corresponding information, or Determine the adjustment mode of the AGC of the first secondary carrier.
  • the following describes how the UE determines whether to adjust the AGC of the first secondary carrier, or determines how to adjust the AGC of the first secondary carrier.
  • the UE determines whether to adjust the AGC of the first secondary carrier.
  • the UE may determine whether to adjust the AGC of the first secondary carrier according to the carrier aggregation mode of the UE.
  • the UE may further combine the transmit power of the UE on the first secondary carrier and/or the transmit power of the UE on the activated carrier to determine whether to Adjust the AGC of the first secondary carrier.
  • the UE on the first secondary carrier For example, if the difference between the transmit power of the UE on the first secondary carrier and the transmit power of the UE on the active carrier is less than or equal to the first threshold, it indicates that the UE has a transmission power on the first secondary carrier and the active carrier. If the difference in transmit power is not large, the AGC on the activated carrier can also be used for the first secondary carrier, so in this case, the UE may not adjust the AGC of the first secondary carrier to simplify the activation of the first secondary carrier process.
  • the UE can adjust the AGC of the first secondary carrier. In this way, the AGC of the first secondary carrier can be made more accurate.
  • the carrier aggregation mode of the UE is the inter-band aggregation mode, it indicates that the time difference between the signals on each carrier reaching the UE is relatively large, or in other words, the UE receives a relatively large time difference for the signals on each carrier, and the AGC of the active carrier of the UE is relatively large. It may not be available for the first secondary carrier, so in this case, the UE can adjust the AGC of the first secondary carrier to make the AGC of the first secondary carrier more accurate.
  • the UE determines the adjustment mode of the AGC of the first secondary carrier.
  • the UE determines the AGC adjustment mode of the first secondary carrier according to the carrier aggregation mode of the UE.
  • the UE may further combine the first information to determine the AGC adjustment mode of the first secondary carrier.
  • the first information may include aggregated carrier information of the UE, or the first information may include the UE's transmit power on the first secondary carrier and/or the UE's transmit power on the activated carrier, and the UE's transmit power Carrier aggregation information.
  • the carrier aggregation information of the UE may indicate that the carrier that the UE participates in the aggregation is a continuous carrier or a non-continuous carrier.
  • the first information includes aggregated carrier information of the UE.
  • the carrier that the UE participates in the aggregation is a continuous carrier, it indicates that the time difference between the signals on each carrier reaching the UE is relatively small, or, in other words, the UE receives a relatively small time difference for the signals on each carrier, then according to the embodiment shown in FIG. 3 It can be seen from the introduction that the UE can obtain the coarse timing information of the first secondary carrier according to the timing information of the primary carrier and the symbol-level timing information of the first secondary carrier. Temporary RSs are received, so in this case, the UE can adjust the AGC of the first secondary carrier according to the temporary RS on the first secondary carrier.
  • the adjustment method of the AGC of the first secondary carrier is to adjust the AGC of the first secondary carrier according to the temporary RS.
  • the network device sends the second temporary RS on the first secondary carrier, and after obtaining the coarse timing information of the first secondary carrier, the UE can receive the second temporary RS from the network device on the first secondary carrier, so that the UE can receive the second temporary RS from the network device on the first secondary carrier.
  • the second temporary RS adjusts the AGC of the first secondary carrier.
  • the carrier that the UE participates in aggregation is a non-contiguous carrier, this indicates that the time difference between the signals on each carrier reaching the UE is relatively large, or, in other words, the UE receives a relatively large time difference for the signals on each carrier.
  • the coarse timing information of the first secondary carrier obtained from the timing information and the symbol-level timing information of the first secondary carrier may not be accurate enough, and the UE may not be able to receive information from the network device on the first secondary carrier according to the coarse timing information of the first secondary carrier. In this case, it is not feasible to use the temporary RS to adjust the AGC.
  • the UE can adjust the AGC of the first secondary carrier according to other RSs on the first secondary carrier, or in this case, the AGC of the first secondary carrier is adjusted according to other RSs.
  • AGC of a secondary carrier include, for example, SSB and/or CSI-RS and the like.
  • the UE may blindly detect the SSB and/or CSI-RS on the first secondary carrier to complete the adjustment of the AGC for the first secondary carrier.
  • the first information includes the transmit power of the UE on the first secondary carrier and/or the transmit power of the UE on the activated carrier, and includes carrier aggregation information of the UE.
  • the carrier that the UE participates in the aggregation is a continuous carrier, this indicates that the time difference between the signals on each carrier reaching the UE is relatively small, or, in other words, the UE receives a relatively small time difference for the signals on each carrier.
  • the coarse timing information of the first secondary carrier is obtained, and the UE can correctly receive the temporary RS on the first secondary carrier according to the coarse timing information of the first secondary carrier.
  • the UE needs to adjust the AGC of the first secondary carrier, then The UE may adjust the AGC of the first secondary carrier according to the temporary RS on the first secondary carrier.
  • the adjustment method of the AGC of the first secondary carrier is to adjust the AGC of the first secondary carrier according to the temporary RS.
  • the network device sends the second temporary RS on the first secondary carrier, and after obtaining the coarse timing information of the first secondary carrier, the UE can receive the second temporary RS from the network device on the first secondary carrier, so that the UE can receive the second temporary RS from the network device on the first secondary carrier.
  • the second temporary RS adjusts the AGC of the first secondary carrier.
  • the carrier that the UE participates in the aggregation is a continuous carrier, but the difference between the transmit power of the UE on the first secondary carrier and the transmit power of the UE on the activated carrier is less than or equal to the first threshold, the carrier is activated
  • the AGC of the first secondary carrier can also be used for the first secondary carrier, so the UE does not need to adjust the AGC of the first secondary carrier, so as to simplify the activation process of the secondary carrier.
  • the carrier that the UE participates in aggregation is a non-contiguous carrier, this indicates that the time difference between the signals on each carrier reaching the UE is relatively large, or in other words, the UE compares the receiving time difference of the signals on each carrier, then the UE is based on the timing of the primary carrier.
  • the coarse timing information of the first secondary carrier obtained from the information may not be accurate enough, and the UE may not be able to receive the temporary RS from the network device on the first secondary carrier according to the coarse timing information of the first secondary carrier.
  • the UE needs to adjust the AGC of the first secondary carrier, however, it is not feasible to use the temporary RS to adjust the AGC of the first secondary carrier. Therefore, in this case, the UE can adjust the AGC of the first secondary carrier according to other RSs on the first secondary carrier, or in this case, the AGC of the first secondary carrier is adjusted according to other RSs.
  • AGC of a secondary carrier Other RSs include, for example, SSB and/or CSI-RS and the like.
  • the UE may blindly detect the SSB and/or CSI-RS on the first secondary carrier to complete the adjustment of the AGC for the first secondary carrier.
  • the carrier that the UE participates in aggregation is a non-contiguous carrier, but the difference between the transmit power of the UE on the first secondary carrier and the transmit power of the UE on the activated carrier is less than or equal to the first threshold, then the activation
  • the AGC of the carrier can also be used for the first secondary carrier, so the UE does not need to adjust the AGC of the first secondary carrier, so as to simplify the activation process of the secondary carrier.
  • the first information includes the UE's transmit power on the first secondary carrier and/or the UE's transmit power on the activated carrier, and the UE's carrier
  • the timing offset between the first secondary carrier and the active carrier of the UE may also be included. For example, if the carrier that the UE participates in aggregation is a discontinuous carrier, and the difference between the transmit power of the UE on the first secondary carrier and the transmit power of the UE on the activated carrier is greater than the first threshold, the UE needs to adjust the AGC of the first secondary carrier.
  • the timing of the first secondary carrier and each of all activated carriers of the UE is offset (that is, between the timing of the first secondary carrier and the timing of each of all activated carriers of the UE) If the UE obtains the coarse timing information of the first secondary carrier based on the timing information of which activated carrier, the obtained coarse timing information of the first secondary carrier may not be accurate enough, resulting in the inability to use the temporary RS. to adjust the AGC of the first secondary carrier.
  • the UE can adjust the AGC of the first secondary carrier according to other RSs on the first secondary carrier, or in this case , the AGC of the first secondary carrier is adjusted by adjusting the AGC of the first secondary carrier according to other RSs.
  • Other RSs include, for example, SSB and/or CSI-RS and the like.
  • the UE may blindly detect the SSB and/or CSI-RS on the first secondary carrier to complete the adjustment of the AGC for the first secondary carrier.
  • the UE may base on the timing information of one or more of the at least one active carrier and the symbol of the first secondary carrier
  • the primary timing information obtains the coarse timing information of the first secondary carrier.
  • the UE can receive the temporary RS from the network device on the first secondary carrier. Therefore, the UE can The temporary RS is used to adjust the AGC of the first secondary carrier, or in this case, the adjustment method of the AGC of the first secondary carrier is to adjust the AGC of the first secondary carrier according to the temporary RS.
  • the network device sends the second temporary RS on the first secondary carrier, and after obtaining the coarse timing information of the first secondary carrier, the UE can receive the second temporary RS from the network device on the first secondary carrier, so that the UE can receive the second temporary RS from the network device on the first secondary carrier.
  • the second temporary RS adjusts the AGC of the first secondary carrier.
  • the UE can have a certain opportunity to use the temporary RS to adjust the AGC of the first secondary carrier, thereby improving the activation efficiency of the first secondary carrier.
  • the carrier aggregation mode of the UE is the intra-band aggregation mode
  • the following describes how the UE determines the AGC adjustment mode of the first secondary carrier if the carrier aggregation mode of the UE is the inter-band aggregation mode.
  • the carrier aggregation mode of the UE is an inter-band aggregation mode
  • AGC of the secondary carrier the coarse timing information of the first secondary carrier obtained by the UE according to the timing information of the primary carrier may not be accurate enough, and the UE may not be able to receive the temporary RS from the network device on the first secondary carrier according to the coarse timing information of the first secondary carrier. In this case, it is infeasible for the UE to use the temporary RS to adjust the AGC of the first secondary carrier.
  • the UE can adjust the AGC of the first secondary carrier according to other RSs on the first secondary carrier, or in this case, the AGC of the first secondary carrier is adjusted according to other RSs.
  • AGC of a secondary carrier include, for example, SSB and/or CSI-RS and the like.
  • the UE may blindly detect the SSB and/or CSI-RS on the first secondary carrier to complete the adjustment of the AGC for the first secondary carrier.
  • the carrier aggregation mode of the UE is inter-band aggregation mode, and the timing deviation between the first secondary carrier and each activated carrier in all activated carriers of the UE is greater than the CP duration, then no matter which activated carrier the UE is based on When the coarse timing information of the first secondary carrier is obtained, the obtained coarse timing information of the first secondary carrier may not be accurate enough, so that the temporary RS cannot be used to adjust the AGC of the first secondary carrier.
  • the UE can adjust the AGC of the first secondary carrier according to other RSs on the first secondary carrier, or in this case , the adjustment method of the AGC of the first secondary carrier is to adjust the AGC of the first secondary carrier according to other RSs.
  • Other RSs include, for example, SSB and/or CSI-RS and the like.
  • the UE may blindly detect the SSB and/or CSI-RS on the first secondary carrier to complete the adjustment of the AGC for the first secondary carrier.
  • the UE may obtain the rough timing information of the first secondary carrier based on the timing information of one or more activated carriers in the at least one activated carrier. Timing information, according to the coarse timing information of the first secondary carrier, the UE can receive the temporary RS from the network device on the first secondary carrier, so the UE can adjust the AGC of the first secondary carrier according to the temporary RS on the first secondary carrier. , or in this case, the adjustment method of the AGC of the first secondary carrier is to adjust the AGC of the first secondary carrier according to the temporary RS.
  • the network device sends the second temporary RS on the first secondary carrier, and after obtaining the coarse timing information of the first secondary carrier, the UE can receive the second temporary RS from the network device on the first secondary carrier, so that the UE can receive the second temporary RS from the network device on the first secondary carrier.
  • the second temporary RS adjusts the AGC of the first secondary carrier.
  • the UE can have a certain opportunity to use the temporary RS to adjust the AGC of the first secondary carrier, thereby improving the activation efficiency of the first secondary carrier.
  • the UE identifies the first secondary carrier.
  • the first secondary carrier is unknown, indicating that the UE has not yet identified the first secondary carrier. Therefore, if the UE determines that the AGC needs to be adjusted according to the determination process of S402, the UE can adjust the AGC after adjusting the AGC. Identify a secondary carrier; or, if the UE determines that the AGC does not need to be adjusted according to the determination process of S402, the UE may identify the first secondary carrier.
  • T activation_time represents the actual activation duration of the secondary carrier to be activated
  • T firstSSB_MAX + T SMTC_MAX represents the duration of adjusting the AGC based on the SSB, and two processes of adjusting the AGC based on the SSB are required.
  • Equation 4 includes two T rs , one of the T rs represents the duration for identifying the secondary carrier to be activated, and the other T rs represents the duration for the UE to perform time-frequency synchronization with the secondary carrier to be activated.
  • Equation 4 is just an example, for example, the value 5 in Equation 4 can also be replaced with other values, or can also be replaced with other functions, or T firstSSB_MAX +T SMTC_MAX +2 ⁇ T rs +5ms in Equation 4 is also It can be replaced by f(T firstSSB_MAX ,T SMTC_MAX ,T rs ), where f(x) represents a function with x as a variable, which may be an addition function or a function of other calculation forms.
  • T firstSSB_MAX + T SMTC_MAX can be changed to indicate the duration of adjusting the AGC based on the temporary RS, which also requires two processes of adjusting the AGC based on the temporary RS.
  • the UE can identify the first secondary carrier.
  • the UE can identify the first secondary carrier after adjusting the AGC based on the SSB twice.
  • the UE After identifying the first secondary carrier, the UE obtains the symbol-level timing information of the first secondary carrier.
  • the network device sends the first temporary RS on the first secondary carrier, and accordingly, the UE receives the first temporary RS from the first secondary carrier (or, the UE receives the first temporary RS from the network device on the first secondary carrier). RS).
  • the UE performs time-frequency synchronization with the first secondary carrier according to the first temporary RS.
  • the UE performs time-frequency synchronization with the first secondary carrier, which can also be understood as performing time-frequency tracking or precise timing between the UE and the first secondary carrier, or as obtaining the precise timing information of the first secondary carrier by the UE.
  • the network device sends the first temporary RS on the first secondary carrier. After obtaining the coarse timing information of the first secondary carrier, the UE can also correctly receive the first temporary RS from the first secondary carrier, so that the UE can use the first temporary RS.
  • the RS is time-frequency synchronized with the first secondary carrier.
  • the first temporary RS and the aforementioned second temporary RS may be the same signal or different signals.
  • the UE can still perform time-frequency synchronization with the first secondary carrier according to the temporary RS, which can also reduce the activation time of the secondary carrier to a certain extent. extension. Then, if the UE adjusts the AGC according to other RSs, when the network device should send the temporary RS (eg, the first temporary RS) for the UE to perform time-frequency synchronization is an issue that needs to be discussed.
  • the temporary RS eg, the first temporary RS
  • the network device sends the temporary RS too early, even if the UE receives the temporary RS, it cannot perform time-frequency synchronization in time, so that the temporary RS is redundant information for the UE, which wastes transmission resources. However, if the network device sends the temporary RS too late, the UE cannot perform time-frequency synchronization in time, which will increase the activation delay of the first secondary carrier. Therefore, if the UE adjusts the AGC according to other RSs, as to when the network device should send the temporary RS for the UE to perform time-frequency synchronization, the embodiment of the present application proposes that, when the first condition is satisfied, the network device can send the temporary RS to the UE. Temporary RS. There are different implementations of the first condition, and the following examples are introduced.
  • the first condition is from the completion of sending the activation command to the end of the third SSB measurement timing configuration (SSB measurement timing configuration, SMTC) cycle.
  • SSB measurement timing configuration SSB measurement timing configuration, SMTC
  • the network device may estimate the time for the UE to complete the AGC adjustment and the identification of the first secondary carrier according to the worst AGC adjustment process and the time for the identification of the secondary carrier, and then trigger the transmission of the temporary RS. For example, the network device considers that the UE will complete the AGC adjustment and the identification of the first secondary carrier after 3 SMTC cycles after sending the activation command of S401. When the SMTC period ends, a temporary RS may be sent, for example, the first temporary RS is sent. In this case, the activation time of the first secondary carrier may satisfy the following relationship:
  • T activation T firstSSB_MAX +T SMTC_MAX +T rs +T first_TempRS +5ms (Equation 5)
  • T firstSSB_MAX + T SMTC_MAX indicates the duration of AGC adjustment based on other RSs (such as SSB), T rs indicates the duration of identifying the secondary carrier to be activated, and T first_TempRS indicates that the UE waits and obtains (or receives) from the first The duration of the first complete temporary RS burst of the secondary carrier.
  • formula 5 is just an example, for example, the numerical value 5 in formula 5 can also be replaced with other numerical values, or can also be replaced with other functions, or T firstSSB_MAX +T SMTC_MAX +T rs +T first_TempRS +5ms in formula 5 It can also be replaced with f(T firstSSB_MAX ,T SMTC_MAX ,T rs ,T first_TempRS ), where f(x) represents a function with x as a variable, which may be an addition function or a function of other calculation forms.
  • the UE will measure the first secondary carrier to obtain CSI or CQI, and the UE will send the CSI or CQI to the network device. Then, if the network device receives the CSI or CQI from the UE, it indicates that the UE has completed the time-frequency synchronization with the first secondary carrier. Therefore, if the network device receives the CSI or CQI from the UE, it can stop sending the first temporary RS to Save signaling overhead.
  • the first condition is from the completion of sending the activation command to the end of the first SMTC cycle.
  • the AGC adjustment process of the UE and the identification process of the first secondary carrier may not require three SMTC cycles, for example, it may be completed in only one SMTC cycle. Therefore, in order to reduce the activation delay of the secondary carrier, in the second implementation manner of the first condition, the time reserved by the network device for the AGC adjustment process of the UE and the identification process of the first secondary carrier is shorter. After the process and the identification process of the first secondary carrier are completed, the temporary RS from the network device can be received in time, so that time-frequency synchronization with the first secondary carrier can be performed in time.
  • the network device may continuously send temporary RSs (eg, the first temporary RSs), and the UE will measure the first temporary RS after completing the time-frequency synchronization with the first secondary carrier.
  • a secondary carrier to obtain CSI or CQI and the UE will send the CSI or CQI to the network device.
  • the network device receives the CSI or CQI from the UE, it indicates that the UE has completed the time-frequency synchronization with the first secondary carrier. Therefore, if the network device receives the CSI or CQI from the UE, it can stop sending the first temporary RS to Save signaling overhead.
  • the UE can perform time-frequency synchronization with the first secondary carrier as soon as possible, thereby reducing the activation delay of the first secondary carrier.
  • the first condition is that the network device receives the second indication information from the UE, and the second indication information may indicate that the identification of the first secondary carrier has been completed.
  • the UE After the UE completes the identification of the first secondary carrier, it can send the second indication information to the network device. After receiving the second indication information, the network device can send a temporary RS (for example, the first temporary RS) for the UE to communicate with the first The secondary carrier performs time-frequency synchronization.
  • a temporary RS for example, the first temporary RS
  • the second indication information may be implemented by an SSB index (index).
  • the AGC adjustment process of the UE and the identification process of the first secondary carrier may be completed according to other RSs from the network device, and the other RSs are, for example, SSBs. Then, when the UE sends the SSB index to the network device, it indicates that the UE has identified the SSB sent by the network device, so the network device can confirm that the UE has completed the identification of the first secondary carrier.
  • the second indication information may be implemented through SR.
  • SR is originally used for the UE to request resources from the network device, and the UE informs the network device that the identification of the first secondary carrier has been completed. In fact, it is also to trigger the network device to send a temporary RS for the UE to perform time-frequency synchronization with the first secondary carrier.
  • the second indication information can also be regarded as an implicit request resource, so using the SR as the second indication information not only reuses the SR, but also does not deviate from the original function of the SR.
  • the second indication information can also be implemented through other existing information, and the existing information is used as the second indication information without introducing new information, so that the technical solutions of the embodiments of the present application are more compatible with the existing information. protocol compatible.
  • the second indication information may also be newly introduced information, for example, information dedicated to indicating that the UE has completed the identification of the secondary carrier to be activated. By using the newly introduced information as the second indication information, the second indication information is more clear.
  • the UE After the UE completes time-frequency synchronization with the first secondary carrier, it will measure the first secondary carrier to obtain CSI or CQI, and the UE will send the CSI or CQI to the network device. Then, if the network device receives the CSI or CQI from the UE, it indicates that the UE has completed the time-frequency synchronization with the first secondary carrier. Therefore, if the network device receives the CSI or CQI from the UE, it can stop sending the first temporary RS to Save signaling overhead.
  • the activation process of the first secondary carrier may need to perform some other steps, for which reference may be made to the introduction of the process shown in FIG. 1B .
  • the UE may assist in activating the secondary carrier according to the temporary RS.
  • the UE may adjust the AGC according to the temporary RS, and may also perform time-frequency synchronization with the first secondary carrier according to the temporary RS, which reduces the number of activated secondary carriers.
  • the process depends on SSB, the process of activating the secondary carrier does not need to depend on the transmission period of the SSB, which speeds up the activation process of the secondary carrier and reduces the time delay of the activation process of the secondary carrier.
  • the UE cannot activate the secondary carrier according to the temporary RS, it can continue to activate the secondary carrier according to reference signals such as SSB, which provides more choices for the activation of the secondary carrier, and improves the activation success rate of the secondary carrier.
  • the following describes the difference between the activation of the secondary carrier using the temporary reference signal and the activation of the secondary carrier using the SSB through several examples.
  • the frequency of the secondary carrier to be activated belongs to FR1 as an example.
  • FIG. 4B is a schematic diagram of using SSB for secondary carrier activation
  • FIG. 4C is a schematic diagram of secondary carrier activation using a temporary reference signal provided by an embodiment of the present application.
  • the slashed box represents the transmission time of the SSB
  • the blank box represents the time when the SSB is not sent, from which the transmission cycle of the SSB can also be seen.
  • the second and third rows in Figures 4B and 4C represent the temporal relationship relative to the first row.
  • the AGC in the second row of FIG. 4C represents the corresponding relationship between the time of the AGC function and the time of the SSB in the first row.
  • the boxes with horizontal lines represent the transmission time of the temporary reference signal, and FIG. 4C takes the temporary reference signal as an aperiodic signal as an example.
  • the network device instructs the UE to activate a certain secondary carrier, it may send an activation command to the UE, and the UE may enter the activation process of the secondary carrier after receiving the activation command. For example, the UE will process the activation command.
  • the UE can adjust the AGC. After the AGC is adjusted, the UE can detect the synchronization signal to identify the secondary carrier, and then the UE can perform time-frequency synchronization with the secondary carrier.
  • the UE can measure the secondary carrier to obtain CSI (or CQI), and send the CSI (or CQI) to the network device, thereby completing the activation process of the secondary carrier.
  • the activation process of the secondary carrier may also include some other steps, for details, please refer to the foregoing introduction.
  • the arrow represents the time when the network device sends the activation command. If the transmission delay of the activation command is ignored, the arrow also represents the time when the UE receives the activation command.
  • T HARQ represents the time required for the UE to receive and process the activation command.
  • AGC indicates the time when the UE performs AGC adjustment.
  • the synchronization signal detection indicates the time when the UE detects the synchronization signal, for example, the synchronization signal includes PSS/SSS, wherein if the secondary carrier to be activated is known, the synchronization signal detection is not required.
  • Time-frequency synchronization refers to the time at which the UE performs time-frequency synchronization described in the foregoing embodiments, and time-frequency synchronization may also be expressed as time-frequency tracking or precise timing.
  • Reporting CSI refers to the time when the UE sends the CSI to the network device, or, the UE sends the CSI to the network device may also be CQI, and FIG. 4B and FIG. 4C take the CSI as an example.
  • the AGC is aligned with the transmission time of the second SSB, indicating that the UE can perform AGC according to the SSB received within the transmission time of the second SSB;
  • the synchronization signal detection is aligned with the transmission time of the third SSB, indicating that the UE can detect the PSS/SSS received within the transmission time of the third SSB.
  • the time-frequency synchronization process is aligned with the transmission time of the fourth SSB, indicating that the UE can perform time-frequency synchronization with the secondary carrier according to the SSB received within the transmission time of the fourth SSB
  • the time-frequency synchronization process is aligned with the transmission time of the third SSB, indicating that the UE can perform time-frequency synchronization with the secondary carrier according to the SSB received within the transmission time of the third SSB.
  • the UE when using the SSB to activate the secondary carrier, the UE needs to receive the SSB according to the transmission period of the SSB, so as to adjust the AGC, detect the PSS/SSS, and perform time-frequency synchronization according to the SSB.
  • the transmission period of the SSB is relatively long, resulting in a relatively long activation delay of the secondary carrier.
  • the transmission time of the second SSB refers to the time represented by the second diagonally drawn box from left to right in FIG. 4B
  • the transmission time of the third SSB refers to the first time from left to right in FIG. 4B .
  • the time represented by the three diagonally drawn boxes, the transmission time of the fourth SSB refers to the time represented by the fourth diagonally drawn box from left to right in FIG. 4B .
  • the AGC is aligned with the transmission time of the first temporary reference signal, indicating that the UE can Perform AGC; when the secondary carrier is unknown, the synchronization signal detection is aligned with the transmission time of the second SSB, indicating that the UE can detect the PSS/SSS received within the transmission time of the second SSB, and when the secondary carrier is known In the case of , there is no synchronization signal detection process; when the secondary carrier is unknown, the network device may not send the second temporary reference signal shown in FIG. 4C , but send the third temporary reference signal shown in FIG.
  • the network device may send the second temporary reference signal shown in FIG. 4C, the third temporary reference signal shown in FIG. 4C may or may not be sent, and the time-frequency synchronization process is related to the transmission of the second temporary reference signal.
  • Time alignment indicates that the UE can perform time-frequency synchronization with the secondary carrier according to the temporary reference signal received within the transmission time of the second temporary reference signal.
  • the network device may continue to send the SSB, or may not send the SSB.
  • the reason why the SSB is still drawn in FIG. 4C is for better comparison with the manner in which the SSB is used to activate the secondary carrier.
  • the temporary reference signal does not need to be sent according to the period.
  • the network device can send the temporary reference signal when the UE needs it, and the UE can adjust the AGC and perform time-frequency synchronization quickly, which significantly reduces the activation time of the secondary carrier. extension. Since the temporary reference signal is an aperiodic signal, it does not need to reserve transmission time for it periodically. Therefore, the "transmission time of the temporary reference signal" mentioned above can also be replaced by the "temporary reference signal".
  • the transmission time of the first temporary reference signal refers to the time represented by the first horizontally drawn box from left to right in FIG. 4C
  • the transmission time of the second temporary reference signal refers to the time from left to right in FIG. 4C
  • the time represented by the second horizontal box from the right, and the transmission time of the third temporary reference signal refers to the time represented by the third horizontal box from the left to the right in FIG. 4C .
  • the network device sends the temporary reference signal when the T HARQ of the UE ends, that is, the end time of T HARQ and the start time of the network device sending the first temporary reference signal are aligned. But this is just an example. In fact, the network device may also send the temporary reference signal some time after the end of T HARQ of the UE. If this is the case, the end time of T HARQ of the UE may be earlier than that in FIG. 4C . The transmission time of the first temporary reference signal. In addition, in Fig.
  • the UE starts to adjust the AGC after receiving the temporary reference signal, that is, the start time of the UE's AGC adjustment is aligned with the start time of the network device sending the first temporary reference signal, which is only a kind of
  • the UE will start to adjust the AGC after a period of time after the network device sends the temporary reference signal, that is to say, the UE may need a certain reaction time (or processing time), if this is the case, the network
  • the start time of the device sending the first temporary reference signal may be earlier than the start time of the UE's AGC adjustment.
  • the UE starts to perform time-frequency synchronization after receiving the temporary reference signal, that is, the start time of the time-frequency synchronization of the UE is the same as the time when the network device sends the second temporary reference signal.
  • the start times of the reference signals are aligned. This is just an example. It is also possible that the UE will start time-frequency synchronization after a period of time after the network device sends the temporary reference signal, which means that the UE may need a certain response time. (or referred to as processing time), if this is the case, the start time of the network device sending the second temporary reference signal will be earlier than the start time of the UE's time-frequency synchronization.
  • the first temporary reference signal and the second temporary reference signal are adjacent in the time domain, that is, the network device continuously transmits the first temporary reference signal and the second temporary reference signal.
  • the network device sends the second temporary reference signal after a certain period of time after sending the first temporary reference signal.
  • the UE sends CSI to the network device after the time-frequency synchronization is completed, but in practice, the UE may also send the CSI to the network device after a period of time after the time-frequency synchronization is completed, that is, the UE There may be some processing time.
  • the secondary carrier to be activated (for example, the first secondary carrier) all belong to FR1.
  • the first secondary carrier to be activated belongs to a second frequency range, and the second frequency range is, for example, FR2.
  • the network device sends an activation command to the UE, and the UE receives the activation command from the network device.
  • the activation command may instruct to activate a certain secondary carrier, for example, instruct to activate the first secondary carrier, and the first secondary carrier is one of the aggregated carriers of the terminal equipment.
  • the first secondary carrier belongs to, for example, a second frequency range, and the second frequency range is, for example, FR2.
  • the UE may not adjust the AGC of the first secondary carrier; or, if the UE has identified the first secondary carrier, regardless of the first secondary carrier Whether there is an active carrier on the first frequency band of the two frequency ranges, the UE may not adjust the AGC of the first secondary carrier.
  • the first frequency band is a frequency band where the first secondary carrier is located.
  • the frequency difference between each carrier on FR2 is relatively small, so the AGC of the active carrier can be used as the first The AGC of the secondary carrier, so the UE does not have to adjust the AGC of the first secondary carrier in this case.
  • the UE may also consider that the first secondary carrier is known, and there is no need to identify the first secondary carrier.
  • the UE does not need to adjust the AGC of the first secondary carrier, nor does it need to identify the first secondary carrier.
  • the UE receives other RSs (or the first secondary carrier is unknown) from the first secondary carrier.
  • other RSs from the network device are received on the first secondary carrier).
  • the network device sends other RSs on the first secondary carrier. If there is no active carrier on the first frequency band of the second frequency range, and the UE does not recognize the first secondary carrier, the UE receives on the first secondary carrier from the network device. of other RSs.
  • Other RSs include, for example, SSB and/or CSI-RS, and SSB is taken as an example in FIG. 5 .
  • the UE adjusts the AGC of the first secondary carrier according to the other RS.
  • the UE adjusts the AGC of the first secondary carrier according to the SSB as an example.
  • S505 is performed.
  • the UE may adjust the AGC of the first secondary carrier according to the other RSs.
  • the UE On FR2, whether the UE performs AGC adjustment or carrier identification, it needs to perform receive beam scanning. If the UE needs to adjust the AGC according to the temporary RS or identify the first secondary carrier on FR2, the network device will send the temporary RS on multiple downlink transmit beams, and the UE uses the UE's uplink receive beams to align the downlink of the network device respectively. The transmission beam is received, and then the optimal uplink reception beam can be obtained by measuring the temporary RS received by each uplink reception beam, so that the UE can receive the signal from the first secondary carrier according to the optimal uplink reception beam. If the temporary RS is implemented by the TRS, the bandwidth of the TRS is relatively large.
  • the network device will send out dozens of TRS patterns. It is roughly estimated that the TRS needs to occupy multiple time slots continuously. Since the bandwidth of the TRS is relatively large, it is expensive for the network device to continuously send the RS with a large bandwidth. Therefore, the temporary RS is not suitable for the AGC adjustment in the FR2 unknown secondary cell (FR2 unknown scell) scenario. Therefore, if there is no active carrier on the first frequency band of the second frequency range, and the UE does not recognize the first secondary carrier, the UE may perform AGC adjustment according to other RSs to reduce the overhead of network equipment.
  • FR2 unknown scell FR2 unknown scell
  • the UE may also identify the first secondary carrier according to other RSs. For example, the UE may complete the identification of the first secondary carrier after performing the AGC adjustment.
  • the process of identifying the first secondary carrier by the UE reference may be made to the introduction of the process shown in FIG. 1B .
  • S502 and S503 to S504 are two parallel solutions, and one of them is selected for execution according to the situation.
  • the network device sends the temporary RS on the first secondary carrier, and accordingly, the UE receives the temporary RS from the first secondary carrier (or in other words, the UE receives the temporary RS from the network device on the first secondary carrier).
  • the UE performs time-frequency synchronization with the first secondary carrier according to the temporary RS.
  • the UE performs time-frequency synchronization with the first secondary carrier, which can also be understood as performing time-frequency tracking or precise timing between the UE and the first secondary carrier, or as obtaining the precise timing information of the first secondary carrier by the UE.
  • the manner in which the UE obtains the coarse timing information of the first secondary carrier has been introduced. If S502 is performed, the UE can obtain the coarse timing information of the first secondary carrier. Then, for example, the network device sends the temporary RS on the first secondary carrier, and after obtaining the coarse timing information of the first secondary carrier, the UE can also correctly receive the temporary RS from the first secondary carrier, so that the UE can use the temporary RS to communicate with the first secondary carrier.
  • a secondary carrier performs time-frequency synchronization.
  • the UE can obtain the coarse timing information of the first secondary carrier. Then, for example, the network device sends the temporary RS on the first secondary carrier, and after obtaining the coarse timing information of the first secondary carrier, the UE can also correctly receive the temporary RS from the first secondary carrier, so that the UE can use the temporary RS to communicate with the first secondary carrier.
  • a secondary carrier performs time-frequency synchronization (or, in other words, obtains precise timing information of the first secondary carrier).
  • the activation process of the first secondary carrier may need to perform some other steps, for which reference may be made to the introduction of the process shown in FIG. 1B .
  • the UE can still perform time-frequency synchronization with the first secondary carrier according to the temporary RS, which can reduce the frequency to a certain extent.
  • the activation delay of the small secondary carrier can be seen that in this embodiment of the present application, even if the UE does not adjust the AGC, or the UE adjusts the AGC according to other RSs, the UE can still perform time-frequency synchronization with the first secondary carrier according to the temporary RS, which can reduce the frequency to a certain extent. The activation delay of the small secondary carrier.
  • each of the embodiments of the present application analyzes in detail the feasibility of using temporary RS to adjust AGC and realize precise timing in different scenarios, and regulates the behavior of the UE and the configuration of the network device, and achieves a common understanding between the UE and the network device. cognition.
  • FIG. 6 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 600 may be the terminal device or the circuit system of the terminal device described in any one of the embodiment shown in FIG. 3 , the embodiment shown in FIG. 4A , or the embodiment shown in FIG. 5 .
  • the communication apparatus may also be the network device or the circuit system of the network device described in any one of the embodiment shown in FIG. 3 , the embodiment shown in FIG. 4A or the embodiment shown in FIG.
  • the method corresponding to the network device in the above method embodiment is implemented.
  • a circuit system is a chip system.
  • Communication device 600 includes one or more processors 601 .
  • the processor 601 may also be referred to as a processing unit, and may implement certain control functions.
  • the processor 601 may be a general-purpose processor or a special-purpose processor, or the like. For example, including: baseband processor, central processing unit, etc.
  • the baseband processor may be used to process communication protocols and communication data.
  • the central processing unit may be used to control the communication device 600, execute software programs and/or process data.
  • the different processors may be independent devices, or may be provided in one or more processing circuits, eg, integrated on one or more application specific integrated circuits.
  • the communication apparatus 600 includes one or more memories 602 for storing instructions 604, and the instructions 604 can be executed on the processor, so that the communication apparatus 600 executes the methods described in the above method embodiments.
  • the memory 602 may also store data.
  • the processor and the memory can be provided separately or integrated together.
  • the communication apparatus 600 may include instructions 603 (sometimes also referred to as codes or programs), and the instructions 603 may be executed on the processor, so that the communication apparatus 600 executes the methods described in the above embodiments .
  • Data may be stored in the processor 601 .
  • the communication apparatus 600 may further include a transceiver 605 and an antenna 606 .
  • the transceiver 605 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver, an input/output interface, etc., and is used to implement the transceiver function of the communication device 600 through the antenna 606 .
  • the communication device 600 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (universal serial bus, USB) interface, a power management module, an antenna, Speakers, microphones, I/O modules, sensor modules, motors, cameras, or displays, etc. It can be understood that, in some embodiments, the communication apparatus 600 may include more or less components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 601 and the transceiver 605 described in the embodiments of the present application may be implemented in an integrated circuit (IC), an analog IC, a radio frequency identification (RFID), a mixed-signal IC, and an application specific integrated circuit (application specific integrated circuit). integrated circuit, ASIC), printed circuit board (printed circuit board, PCB), or electronic equipment, etc.
  • IC integrated circuit
  • ASIC radio frequency identification
  • PCB printed circuit board
  • electronic equipment etc.
  • it may be an independent device (eg, an independent integrated circuit, a mobile phone, etc.), or may be a part of a larger device (eg, a module that can be embedded in other devices). The description of the terminal device and the network device will not be repeated here.
  • the embodiments of the present application provide a terminal device (for convenience of description, referred to as UE), which can be used in the foregoing embodiments.
  • the terminal device includes corresponding means (means) for implementing the UE function described in any one of the embodiment shown in FIG. 3 , the embodiment shown in FIG. 4A , or the embodiment shown in FIG. 5 , units and/or circuits.
  • a terminal device includes a transceiver module, which is used to support the terminal device to implement a transceiver function, and a processing module, which is used to support the terminal device to process signals.
  • FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 700 may be applicable to the architecture shown in any one of FIG. 1A and FIG. 2A to FIG. 2C .
  • FIG. 7 only shows the main components of the terminal device 700 .
  • the terminal device 700 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control the entire terminal device 700, execute software programs, and process data of the software programs.
  • the memory is mainly used to store software programs and data.
  • the control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, microphones, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • FIG. 7 only shows one memory and processor.
  • terminal device 700 may include multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.
  • the antenna and control circuit with a transceiving function can be regarded as the transceiving unit 710 of the terminal device 700
  • the processor having a processing function can be regarded as the processing unit 720 of the terminal device 700
  • the terminal device 700 includes a transceiver unit 710 and a processing unit 720 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the device for implementing the receiving function in the transceiver unit 710 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 710 may be regarded as a transmitting unit, that is, the transceiver unit 710 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the embodiment of the present application also provides a network device, and the network device can be used in each of the foregoing embodiments.
  • the network device includes means (means) for realizing the function of the network device described in any one of the embodiment shown in FIG. 3 , the embodiment shown in FIG. 4A or the embodiment shown in FIG. 5 , units and/or circuits.
  • the network device includes a transceiver module to support the terminal device to implement a transceiver function, and a processing module to support the network device to process signals.
  • FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device may be applicable to the architecture shown in any one of FIGS. 1A and 2A to 2C .
  • the network equipment includes: a baseband device 801 , a radio frequency device 802 , and an antenna 803 .
  • the radio frequency device 802 receives the information sent by the terminal device through the antenna 803, and sends the information sent by the terminal device to the baseband device 801 for processing.
  • the baseband device 801 processes the information of the terminal device and sends it to the radio frequency device 802
  • the radio frequency device 802 processes the information of the terminal device and sends it to the terminal device through the antenna 803 .
  • the baseband device 801 includes one or more processing units 8011 , storage units 8012 and interfaces 8013 .
  • the processing unit 8011 is configured to support the network device to perform the functions of the network device in the foregoing method embodiments.
  • the storage unit 8012 is used to store software programs and/or data.
  • the interface 8013 is used for exchanging information with the radio frequency device 802, and the interface includes an interface circuit for inputting and outputting information.
  • the processing unit is an integrated circuit, such as one or more ASICs, or one or more digital signal processors (DSP), or one or more field programmable logic gates Array (field programmable gate array, FPGA), or a combination of these types of integrated circuits.
  • the storage unit 8012 and the processing unit 8011 may be located in the same circuit, that is, an on-chip storage element. Alternatively, the storage unit 8012 and the processing unit 8011 may be located on a different circuit, that is, an off-chip storage element.
  • the storage unit 8012 may be a memory, or may be a collective term for multiple memories or storage elements.
  • the network device may implement some or all of the steps in the foregoing method embodiments in the form of one or more processing unit schedulers. For example, the corresponding function of the network device of any one of the embodiment shown in FIG. 3 , the embodiment shown in FIG. 4A , or the embodiment shown in FIG. 5 is implemented.
  • the one or more processing units may support wireless access technologies of the same standard, or may support wireless access standards of different standards.
  • the computer software product is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • a computer-readable medium may include random access memory (RAM), read-only memory (ROM), or a computer-readable medium capable of carrying or storing instructions or data structures desired program code in the form and any other medium that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • a computer-readable medium capable of carrying or storing instructions or data structures desired program code in the form and any other medium that can be accessed by a computer.

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Abstract

本申请涉及一种通信方法及装置。接收来自网络设备的激活命令，激活命令用于激活第一辅载波，第一辅载波是终端设备的辅载波中的一个。在第一辅载波已知的情况下，根据终端设备对第一辅载波的测量周期，确定是否调整第一辅载波的AGC，其中，调整第一辅载波的AGC使用的是临时参考信号。接收来自第一辅载波的第一临时参考信号，根据第一临时参考信号与第一辅载波进行时频同步。在本申请实施例中，可以根据临时参考信号来辅助激活辅载波，从而减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。

Description

一种通信方法及装置 技术领域
本申请涉及移动通信技术领域，尤其涉及一种通信方法及装置。
背景技术
随着移动互联网、物联网等业务的多元化发展，移动通信对海量数据的上传要求不断提高，比如超高清视频、智能监控、虚拟现实(virtual reality，VR)视频直播等业务对上行链路(uplink，UL)容量提出了较高的要求。现有的上行增强方案包括通过载波聚合(carrier aggregation，CA)等技术实现多个频率的协作传输，可在一定程度上提升频谱资源利用率或提升上行覆盖。
在CA场景下，用户设备(user equipment，UE)可聚合多个载波，参与聚合的载波中包括一个主载波(primary carrier，PCC)，也称为主小区(primary cell，Pcell)，以及一个或多个辅载波(secondary carrier，SCC)，也称为辅小区(secondary cell，Scell)。网络设备如果要配置UE工作在某个辅载波上，则需要命令UE激活该辅载波。在辅载波的激活过程中，UE需要接收来自网络设备的同步信号块(synchronization signal block，SSB)，以根据SSB调整自动增益控制(autonomous gain control，AGC)，以及根据SSB与待激活的辅载波进行同步等。
而SSB是周期性发送的，SSB的发送周期一般比较大，通常大于或等于20毫秒(ms)，这导致辅载波的激活时延也比较大，而目前尚且无法解决该问题。
发明内容
本申请实施例提供一种通信方法及装置，用于减小辅载波的激活时延。
第一方面，提供第一种通信方法，该方法可由终端设备执行，或由电路系统执行，该电路系统能够实现终端设备的功能，或者由包括终端设备的较大设备执行。该方法包括：接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；在所述第一辅载波已知的情况下，根据所述终端设备对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC，其中，调整所述第一辅载波的AGC使用的是临时参考信号；接收来自所述第一辅载波的第一临时参考信号；根据所述第一临时参考信号与所述第一辅载波进行时频同步。
在本申请实施例中，可以根据临时参考信号来辅助激活辅载波，从而减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。而且本申请实施例设置了根据临时参考信号激活辅载波的方式，即，网络设备和终端设备都能明确应该在何种情况下应用临时参考信号，以及如何应用临时参考信号，规范了网络设备和终端设备的行为，达成了终端设备和网络设备的共同认知。
在一种可选的实施方式中，根据所述终端设备对所述第一辅载波的测量周期，确定是 否调整所述第一辅载波的AGC，包括：在所述终端设备对所述第一辅载波的测量周期小于或等于第一测量周期的情况下，不调整所述第一辅载波的AGC。如果终端设备对第一辅载波的测量周期小于或等于第一测量周期，表明辅载波的测量周期比较小，则本次还可以继续应用之前确定的AGC，因此在这种情况下可以不调整第一辅载波的AGC，以节省终端设备的功耗，且简化辅载波的激活过程。第一测量周期例如为160ms，或者也可以是其他取值。
在一种可选的实施方式中，所述第一辅载波的激活时长是根据第一时长得到的，所述第一时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长。由于本申请实施例通过临时参考信号来激活辅载波，因此第一辅载波的激活时长可以根据临时参考信号相关的信息得到，而不必依赖于SSB的发送周期。临时参考信号例如为非周期信号，或者也可以是周期性信号，例如临时参考信号的发送周期小于SSB的发送周期，从而能够缩短辅载波的激活时延。
在一种可选的实施方式中，所述第一辅载波的激活时长满足如下关系：T activation_time＝T first_TempRS+5。其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第一时长。这只是第一辅载波的激活时长所需满足的一种关系的示例。
在一种可选的实施方式中，根据所述终端设备对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备对所述第一辅载波的测量周期大于第一测量周期的情况下，接收来自所述第一辅载波的第二临时参考信号；根据所述第二临时参考信号调整所述第一辅载波的AGC。如果终端设备对第一辅载波的测量周期大于第一测量周期，表明辅载波的测量周期较大，本次如果继续应用之前确定的AGC，可能导致AGC不够准确。因此在这种情况下，可以调整第一辅载波的AGC。如果使用SSB来实现对AGC的调整，SSB是按周期发送的，那么调整AGC所需的时间与SSB的发送周期或SSB测量定时配置信息(SSB measurement timing configuration，SMTC)周期有关。而SSB的发送周期一般比较大，通常大于或等于20ms，这导致辅载波的激活时延也比较大。因此本申请实施例提出，可以通过临时参考信号来调整AGC，从而能够缩短辅载波的激活时延。
在一种可选的实施方式中，在所述终端设备的载波聚合方式为带内载波聚合的情况下，所述第一辅载波的激活时长是根据第二时长得到的；其中，所述第二时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长，或所述第二时长为第三时长和第四时长中的最大值，所述第三时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长，所述第四时长为所述终端设备等待并获取来自第二载波的第一个完整的参考信号突发集的时长，所述第二载波包括所述终端设备的激活载波。例如，规定第一辅载波上的临时参考信号的发送时间与该UE的聚合载波中的激活载波上的参考信号的发送时间对齐，那么第二时长就可以取第三时长和第四时长中的最大值，以使得本申请实施例的技术方案能够更好地与现有的协议兼容。或者，由于AGC调整过程的迟滞性，实际上并不一定要求第一辅载波上的临时参考信号的发送时间与该终端设备的聚合载波中的激活载波上的参考信号的发送时间对齐，即使发送时间不对齐，终端设备也能实现对于AGC的调整，因此，也可以不必规定第一辅载波上的临时参考信号的发送时间与该终端设备的聚合载波中的激活载波上的参考信号的发送时间对齐，那么第二时长就可以为终端设备等待并获取来自第一辅载波的第一个完整的临时参考信号突发集的时长，这种方式在未增加终端设备的计算复杂度的情况下，减少了对于网 络设备的限制，为网络设备带来了更大的实现灵活度。
在一种可选的实施方式中，在所述第二时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长的情况下，所述第一辅载波的激活时长满足如下关系：T activation_time＝T first_TempRS+T TempRS+5。其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第二时长，T TempRS表示所述终端设备等待并获取来自所述第一辅载波的一个完整的临时参考信号突发集的时长。这只是第一辅载波的激活时长所需满足的一种关系的示例。
在一种可选的实施方式中，在所述第二时长为所述第三时长和所述第四时长中的最大值的情况下，所述第一辅载波的激活时长满足如下关系：T activation_time＝max{T first_TempRS,T first_RS}+T TempRS+5。其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第三时长，T first_RS表示所述第四时长，max{x,y}表示取x和y中的最大值，T TempRS表示所述终端设备等待并获取来自所述第一辅载波的一个完整的临时参考信号突发集的时长。这只是第一辅载波的激活时长所需满足的一种关系的示例。
在一种可选的实施方式中，来自所述第二载波的参考信号包括如下一种或多种：SSB，CSI-RS，或，临时参考信号。本申请实施例对于该终端设备的激活载波上的参考信号不做限制。
在一种可选的实施方式中，所述方法还包括：向所述网络设备发送能力信息，所述能力信息用于指示AGC的调整与除所述第一辅载波外的其他载波相关，或，所述能力信息用于指示AGC的调整与除所述第一辅载波外的其他载波无关。采用这种方式，可以使得UE的AGC调整过程更为符合UE的能力。
在一种可选的实施方式中，所述第一辅载波属于第一频率范围。第一频率范围例如为低频范围，例如频率范围(frequency range，FR)1，或者也可以是其他的频率范围。
第二方面，提供第二种通信方法，该方法可由终端设备执行，或由电路系统执行，该电路系统能够实现终端设备的功能，或者由包括终端设备的较大设备执行。该方法包括：接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；在所述第一辅载波未知的情况下，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，或，在所述第一辅载波未知的情况下，接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示不调整所述第一辅载波的AGC，或指示对所述第一辅载波的AGC的调整方式；接收来自所述第一辅载波的第一临时参考信号；根据所述第一临时参考信号与所述第一辅载波进行时频同步。
在本申请实施例中，终端设备可以根据临时参考信号来辅助激活辅载波，例如终端设备可以根据临时参考信号调整AGC，也可以根据临时参考信号来跟第一辅载波进行时频同步，这样减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。而且终端设备在无法根据临时参考信号激活辅载波的情况下，还是可以继续根据SSB等参考信号来激活辅载波，为辅载波的激活提供更多种选择，提高了辅载波的激活成功率。
在一种可选的实施方式中，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差小于或等于第一 阈值，不调整所述第一辅载波的AGC。如果终端设备的载波聚合方式为带内载波聚合，且该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值小于或等于第一阈值，表明该UE在第一辅载波和在激活载波上的发射功率之差并不大，则激活载波上的AGC也可以用于第一辅载波，因此在这种情况下，该UE可以不调整第一辅载波的AGC，以简化第一辅载波的激活过程。
在一种可选的实施方式中，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述终端设备的参与聚合的载波为连续载波，接收来自所述第一辅载波的第二临时参考信号，并根据所述第二临时参考信号调整所述第一辅载波的AGC；或，在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述终端设备的参与聚合的载波为连续载波，接收来自所述第一辅载波的第二临时参考信号，并根据所述第二临时参考信号调整所述第一辅载波的AGC。如果终端设备的载波聚合方式为带内聚合的方式，且该终端设备参与聚合的载波为连续载波，这表明各个载波上的信号到达终端设备的时间差比较小，或者说，终端设备对于各个载波上的信号的接收时间差比较小，那么该终端设备可以根据主载波的定时信息和第一辅载波的符号级定时信息获得第一辅载波的粗定时信息，从而终端设备根据第一辅载波的粗定时信息能够在第一辅载波上正确接收临时参考信号，因此在这种情况下，终端设备可以根据第一辅载波上的临时参考信号来调整第一辅载波的AGC，以减小辅载波的激活时延。或者，除了终端设备的载波聚合方式为带内聚合的方式，且该终端设备参与聚合的载波为连续载波外，还需要满足第一辅载波的发射功率与该终端设备的激活载波的发射功率之差大于第一阈值，这样才需要调整第一辅载波的AGC，以减小辅载波的激活时延，而如果第一辅载波的发射功率与该终端设备的激活载波的发射功率之差小于或等于第一阈值，那么，即使终端设备的载波聚合方式为带内聚合的方式，且该终端设备参与聚合的载波为连续载波，也可以考虑不调整第一辅载波的AGC，由此能够进一步减小辅载波的激活时延。
在一种可选的实施方式中，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述终端设备的参与聚合的载波为非连续载波，接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC；或，在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述终端设备的参与聚合的载波为非连续载波，接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC。如果终端设备的载波聚合方式为带内载波聚合，且该终端设备的参与聚合的载波为非连续载波，表明各个载波上的信号到达UE的时间差比较大，或者说，终端设备对于各个载波上的信号的接收时间差比较，那么终端设备根据主载波的定时信息所获得的第一辅载波的粗定时信息可能不够准确，终端设备根据第一辅载波的粗定时信息可能无法在第一辅载波上接收到来自网络设备的临时参考信号。那么在这种情况下，用临时参考信号来调整第一辅载波的AGC的方式是不可行的。因此，终端设备可以根据第一辅载波上的其他参考信号来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据其他参考信号调整第一辅载波的AGC，即，辅载波的激活可以有多种方式，由此可以提高辅载波的激活成功率。其他 参考信号例如包括SSB和/或信道状态信息参考信号(channel state information reference signal，CSI-RS)等。或者，除了终端设备的载波聚合方式为带内聚合的方式，且该终端设备参与聚合的载波为非连续载波外，还需要满足第一辅载波的发射功率与该终端设备的激活载波的发射功率之差大于第一阈值，这样才需要根据调整第一辅载波的AGC，以减小辅载波的激活时延，而如果第一辅载波的发射功率与该终端设备的激活载波的发射功率之差小于或等于第一阈值，那么，即使终端设备的载波聚合方式为带内聚合的方式，且该终端设备参与聚合的载波为非连续载波，也可以考虑不调整第一辅载波的AGC，由此能够进一步减小辅载波的激活时延。
在一种可选的实施方式中，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述第一辅载波与所述终端设备的激活载波的定时偏差大于循环前缀(cyclic prefix，CP)时长，接收来自所述第一辅载波的SSB；根据所述SSB调整所述第一辅载波的AGC。如果终端设备的载波聚合方式为带内载波聚合，且第一辅载波的发射功率与该终端设备的激活载波的发射功率之差大于第一阈值，则该终端设备需要调整第一辅载波的AGC。而如果第一辅载波与该终端设备的所有激活载波的定时偏差均大于CP时长，那么无论终端设备是基于哪个激活载波的定时信息获得第一辅载波的粗定时信息，所获得的第一辅载波的粗定时信息都可能不够准确，导致无法使用临时参考信号来调整第一辅载波的AGC。因此，如果第一辅载波与该终端设备的所有激活载波的定时偏差均大于CP时长，则终端设备可以根据第一辅载波上的其他参考信号(reference signal，RS)来调整第一辅载波的AGC，即，辅载波的激活可以有多种方式，由此可以提高辅载波的激活成功率。其他RS例如包括SSB和/或CSI-RS等。
在一种可选的实施方式中，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备的载波聚合方式为带间载波聚合的情况下，接收来自所述第一辅载波的SSB；根据所述SSB调整所述第一辅载波的AGC。如果终端设备的载波聚合方式为带间聚合的方式，这表明各个载波上的信号到达该终端设备的时间差比较大，或者说，该终端设备对于各个载波上的信号的接收时间差比较大，该终端设备需要调整第一辅载波的AGC。而终端设备根据主载波的定时信息所获得的第一辅载波的粗定时信息可能不够准确，该终端设备根据第一辅载波的粗定时信息可能无法在第一辅载波上接收到来自网络设备的临时参考信号。因此终端设备可以根据第一辅载波上的其他RS来调整第一辅载波的AGC，即，辅载波的激活可以有多种方式，由此可以提高辅载波的激活成功率。其他RS例如包括SSB和/或CSI-RS等。
在一种可选的实施方式中，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：在所述终端设备的载波聚合方式为带间载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述第一辅载波与所述终端设备的激活载波的定时偏差大于CP时长，接收来自所述第一辅载波的SSB；根据所述SSB调整所述第一辅载波的AGC。如果终端设备的载波聚合方式为带间载波聚合，那么还可以进一步确定第一辅载波的发射功率与该终端设备的激活载波的发射功率之差，以及确定第一辅载波的定时偏差与该终端设备的激活载波的定时偏差，如果第一辅载波的发射功率与该终端设备的激活载波的发射功率之差大于第一阈值，但第 一辅载波与该UE的至少一个激活载波的定时偏差小于或等于CP时长，那么终端设备可以基于至少一个激活载波中的一个或多个激活载波的定时信息获得第一辅载波的粗定时信息，根据第一辅载波的粗定时信息，该终端设备能够在第一辅载波上接收来自网络设备的临时参考信号，因此终端设备可以根据第一辅载波上的临时参考信号来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据临时参考信号调整第一辅载波的AGC。通过对CP时长的进一步考虑，可以使得终端设备有一定机会使用临时参考信号调整第一辅载波的AGC，提高第一辅载波的激活效率。
在一种可选的实施方式中，所述第一辅载波属于第一频率范围。第一频率范围例如为低频范围，例如FR1，或者也可以是其他的频率范围。
第三方面，提供第三种通信方法，该方法可由网络设备执行，或由电路系统执行，该电路系统能够实现网络设备的功能。示例性地，所述网络设备为接入网设备，例如基站。该方法包括：向终端设备发送激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是所述终端设备的辅载波中的一个；在所述第一辅载波上向所述终端设备发送SSB，所述SSB用于调整所述第一辅载波的AGC；在满足第一条件的情况下，向所述终端设备发送临时参考信号，所述临时参考信号用于所述终端设备与第一辅载波进行时频同步。
在本申请实施例中，可以根据临时参考信号来辅助激活辅载波，从而减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。
在一种可选的实施方式中，所述第一条件包括：从所述激活命令发送完毕开始，到第三个SMTC周期结束；或，从所述激活命令发送完毕开始，到第一个SMTC周期结束；或，接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示已完成对所述第一辅载波的识别。如果终端设备根据其他参考信号调整了AGC，则网络设备可以在满足第一条件的情况下发送临时参考信号以供终端设备进行时频同步。例如第一条件为从激活命令发送完毕开始，到第三个SMTC周期结束，这样可以为终端设备的AGC调整过程和第一辅载波的识别过程预留较为充足的时间。又例如，第一条件为从激活命令发送完毕开始，到第一个SMTC周期结束，这种方式能够使得终端设备尽快与第一辅载波进行时频同步，减小第一辅载波的激活时延。再例如，第一条件为网络设备接收来自UE的第二指示信息，第二指示信息可指示已完成对第一辅载波的识别。例如终端设备在完成对第一辅载波的识别后，可以向网络设备发送第二指示信息，网络设备接收第二指示信息后，就可以发送临时参考信号，以供终端设备与第一辅载波进行时频同步，这样可以使得网络设备能够及时发送临时参考信号，减小辅载波的激活时延，且网络设备也是在终端设备需要的时候发送临时参考信号，提高了临时参考信号的利用率，减少了资源浪费的情况。
在一种可选的实施方式中，所述第二指示信息为SSB的索引，或所述第二指示信息为调度请求(scheduling request，SR)。例如，第二指示信息可通过SSB索引实现。终端设备的AGC调整过程和第一辅载波的识别过程，可能都是根据来自网络设备的其他参考信号完成的，其他参考信号例如为SSB。那么终端设备向网络设备发送SSB的索引，就表明终端设备已识别了网络设备所发送的SSB，因此网络设备就能明确终端设备已经完成了对第一辅载波的识别。又例如，第二指示信息可通过SR实现。SR原本是用于终端设备向网络设备请求资源，而终端设备向网络设备告知已完成对第一辅载波的识别，实际上也是要触发网络设备发送临时RS以供终端设备与第一辅载波进行时频同步，因此第二指示信息也 可以视为隐式请求资源，那么通过SR来作为第二指示信息，既复用了SR，且也未脱离SR原本的功能。
在一种可选的实施方式中，所述第一辅载波属于第一频率范围。第一频率范围例如为低频范围，例如FR1，或者也可以是其他的频率范围。
第四方面，提供第四种通信方法，该方法可由终端设备执行，或由电路系统执行，该电路系统能够实现终端设备的功能，或者由包括终端设备的较大设备执行。该方法包括：接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；在第二频率范围的第一频段上已有至少一个激活载波的情况下，或在所述第一辅载波已知的情况下，不调整所述第一辅载波的AGC，或者，在第二频率范围的第一频段上没有激活载波，且所述第一辅载波未知的情况下，接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC；其中，所述第一频段是所述第一辅载波所在的频段；接收来自所述第一辅载波的临时参考信号；根据所述临时参考信号与所述第一辅载波进行时频同步。在本申请实施例中，即使终端设备未调整AGC，或者终端设备根据其他参考信号调整了AGC，终端设备仍然可以根据临时参考信号来与第一辅载波进行时频同步，这样也能在一定程度上减小辅载波的激活时延。
第五方面，提供一种通信装置。该通信装置可以为上述第一方面至第四方面中的任意一方面所述的终端设备，或者为配置在所述终端设备中的电子设备(例如，电路系统)，或者为包括所述终端设备的较大设备。所述终端设备包括用于执行上述方法的相应的手段(means)或模块。例如，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。
例如，所述收发单元，用于接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；
所述处理单元，用于在所述第一辅载波已知的情况下，根据所述终端设备对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC，其中，调整所述第一辅载波的AGC使用的是临时参考信号；
所述收发单元，还用于接收来自所述第一辅载波的第一临时参考信号；
所述处理单元，还用于根据所述第一临时参考信号与所述第一辅载波进行时频同步。
又例如，所述收发单元，用于接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；
所述处理单元，用于在所述第一辅载波未知的情况下，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC；或，所述处理单元，用于在所述第一辅载波未知的情况下，通过所述收发单元接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示不调整所述第一辅载波的AGC，或指示对所述第一辅载波的AGC的调整方式；
所述收发单元，还用于接收来自所述第一辅载波的第一临时参考信号；
所述处理单元，还用于根据所述第一临时参考信号与所述第一辅载波进行时频同步。
又例如，所述收发单元，用于接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；
所述处理单元，用于在第二频率范围的第一频段上已有至少一个激活载波的情况下，或在所述第一辅载波已知的情况下，不调整所述第一辅载波的AGC；或者，所述处理单元， 用于在第二频率范围的第一频段上没有激活载波，且所述第一辅载波未知的情况下，通过所述收发单元接收来自所述第一辅载波的SSB，所述处理单元还用于根据所述SSB调整所述第一辅载波的AGC；其中，所述第一频段是所述第一辅载波所在的频段；
所述收发单元，还用于接收来自所述第一辅载波的临时参考信号；
所述处理单元，还用于根据所述临时参考信号与所述第一辅载波进行时频同步。
再例如，所述通信装置包括：处理器，与存储器耦合，用于执行存储器中的指令，以实现上述第一方面至第四方面中的任意一方面中终端设备所执行的方法。可选的，该通信装置还包括其他部件，例如，天线，输入输出模块，接口等等。这些部件可以是硬件，软件，或者软件和硬件的结合。
第六方面，提供一种通信装置。所述通信装置可以为上述第一方面至第四方面中的任意一方面所述的网络设备。所述通信装置具备上述网络设备的功能。所述网络设备例如为基站，或为基站中的基带装置。一种可选的实现方式中，所述通信装置包括基带装置和射频装置。另一种可选的实现方式中，所述通信装置包括处理单元(有时也称为处理模块)和收发单元(有时也称为收发模块)。
例如，所述收发单元，用于向终端设备发送激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是所述终端设备的辅载波中的一个；
所述收发单元，还用于在所述第一辅载波上向所述终端设备发送SSB，所述SSB用于调整所述第一辅载波的AGC；
所述收发单元，还用于在满足第一条件的情况下，向所述终端设备发送临时参考信号，所述临时参考信号用于所述终端设备与第一辅载波进行时频同步(或者，所述处理单元，用于确定满足第一条件；所述收发单元，用于向所述终端设备发送临时参考信号，所述临时参考信号用于所述终端设备与第一辅载波进行时频同步)。
又例如，所述通信装置包括：处理器，与存储器耦合，用于执行存储器中的指令，以实现上述第一方面至第四方面中的任意一方面中网络设备所执行的方法。可选的，该通信装置还包括其他部件，例如，天线，输入输出模块，接口等等。这些部件可以是硬件，软件，或者软件和硬件的结合。
第七方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，当其被运行时，使得上述各方面中终端设备或网络设备所执行的方法被实现。
第八方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得上述各方面所述的方法被实现。
在本申请实施例中，可以根据临时参考信号来辅助激活辅载波，从而减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。
附图说明
图1A为本申请实施例的通信系统的示意图；
图1B为辅载波激活过程的流程图；
图2A为本申请实施例的一种应用场景的示意图；
图2B为本申请实施例的另一种应用场景的示意图；
图2C为本申请实施例的又一种应用场景的示意图；
图3为本申请实施例提供的一种通信方法的流程图；
图4A为本申请实施例提供的另一种通信方法的流程图；
图4B为根据SSB进行辅载波激活的一种示意图；
图4C为本申请实施例中根据临时参考信号进行辅载波激活的一种示意图；
图5为本申请实施例提供的再一种通信方法的流程图；
图6为本申请实施例提供的通信装置的一种示意性框图；
图7为本申请实施例提供的终端设备的一种示意性框图；
图8为本申请实施例提供的网络设备的一种示意性框图。
具体实施方式
本申请实施例提供的技术可以应用于图1A所示的通信系统10中，通信系统10包括一个或多个通信装置30(例如，终端设备)，这一个或多个通信装置30经由一个或多个接入网设备20连接到一个或多个核心网设备，以实现多个通信设备之间的通信。所述通信系统例如可以支持2G,3G,4G,或5G(有时也称为new radio，NR)接入技术的通信系统，无线保真(wireless fidelity，Wi-Fi)系统，第三代合作伙伴计划(3rd generation partnership project，3GPP)相关的蜂窝系统，支持多种无线技术融合的通信系统，或者是面向未来的演进系统。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
本申请实施例中，终端设备是一种具有无线收发功能的设备，可以是固定设备，移动设备、手持设备(例如手机)、穿戴设备、车载设备，或内置于上述设备中的无线装置(例如，通信模块，调制解调器，或电路系统等)。所述终端设备用于连接人，物，机器等，可广泛用于各种场景，例如包括但不限于以下场景：蜂窝通信、设备到设备通信(device-to-device，D2D)、车到一切(vehicle to everything，V2X)、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)、物联网(internet of things，IoT)、虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、智能家具、智能办公、智能穿戴、智能交通，智慧城市(smart city)、无人机、机器人等场景的终端设备。所述终端设备有时可称为用户设备(user equipment，UE)、终端、接入站、UE站、远方站、无线通信设备、或用户装置等等。为描述方便，本申请实施例将终端设备以UE为例进行说明。
本申请实施例中的网络设备，例如包括接入网设备，和/或核心网设备。所述接入网设备为具有无线收发功能的设备，用于与所述终端设备进行通信。所述接入网设备包括但不限于上述通信系统中的基地收发站(BTS)，节点B(Node B)，演进节点B(eNodeB/eNB，或gNodeB/gNB)、收发点(transmission reception point，TRP)，第三代合作伙伴计划(3rd generation partnership project，3GPP)后续演进的基站，无线保真(wireless fidelity，WiFi)系统中的接入节点，无线中继节点，无线回传节点等。所述基站可以是：宏基站，微基站，微微基站，小站，中继站等。多个基站可以支持上述提及的同一种接入技术的网络，也可以支持上述提及的不同接入技术的网络。基站可以包含一个或多个共站或非共站的传输接 收点。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit，DU)。网络设备还可以是服务器，可穿戴设备，或车载设备等。例如，车到一切(vehicle to everything，V2X)技术中的网络设备可以为路侧单元(road side unit，RSU)。以下对接入网设备以为基站为例进行说明。所述通信系统中的多个网络设备可以为同一类型的基站，也可以为不同类型的基站。基站可以与终端设备进行通信，也可以通过中继站与终端设备进行通信。终端设备可以与不同接入技术中的多个基站进行通信。所述核心网设备用于实现移动管理，数据处理，会话管理，策略和计费等功能。不同接入技术的系统中实现核心网功能的设备名称可以不同，本申请实施例并不对此进行限定。以5G系统为例，所述核心网设备包括：访问和移动管理功能(access and mobility management function，AMF)、会话管理功能(session management function，SMF)、或用户面功能(user plane function，UPF)等。
本申请实施例中，用于实现网络设备功能的通信装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如电路系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
本申请实施例中，对于名词的数目，除非特别说明，表示“单数名词或复数名词”，即"一个或多个”。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。例如，A/B，表示：A或B。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，表示：a,b,c,a和b,a和c,b和c,或a和b和c，其中a,b,c可以是单个，也可以是多个。
本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的大小、内容、顺序、时序、应用场景、优先级或者重要程度等。例如，第一时长和第二时长，可以是同一个时长，也可以是不同的时长，且，这种名称也并不是表示这两个时长的长度、优先级、应用场景或者重要程度等的不同。
在CA场景下，UE可聚合多个载波，参与聚合的载波中包括一个主载波，以及一个或多个辅载波。网络设备如果要配置UE工作在某个辅载波上，则需要命令UE激活该辅载波。下面请参考图1B，介绍辅载波的激活过程。
S101、基站向UE发送激活命令，UE接收来自基站的激活命令。该激活命令可以指示激活某个辅载波，例如指示激活辅载波1。
S102、UE调整辅载波1的AGC。
UE可在辅载波1上接收SSB，并根据接收的SSB调整辅载波1的AGC。如果UE尚未对辅载波1进行识别，或者虽然UE已对辅载波1进行了识别，但UE对辅载波1的测量周期(measurement cycle，MC)大于或等于160ms，则UE需要执行S102，否则UE无需执行S102。
S103、UE对辅载波1进行探测，或者说UE对辅载波1进行识别。该过程可称为小区识别过程，或称为载波识别过程。UE对辅载波1进行探测，例如包括对辅载波1的主同步信号(primary synchronization signal，PSS)和/或辅同步信号(secondary synchronization  signal，SSS)进行探测。通过对辅载波1进行识别，基于SSB可以获得辅载波1的身份号(identity，ID)，以及获得辅载波1的符号级定时信息。
UE可在辅载波1上接收SSB，并根据该SSB获得辅载波1的身份号(ID)，以及获得辅载波1的符号级的定时信息，以完成对辅载波1的识别。其中，符号级的定时信息可以理解为，是正交频分复用(orthogonal frequency division multiplexing，OFDM)符号(symbol)的边界定时。当然，辅载波的识别过程还可能包括其他步骤，本申请实施例不做限制。其中，如果UE尚未对辅载波1进行识别，则可执行S103，否则UE无需执行S103。
S104、UE向网络设备发送辅载波1的层1参考信号接收功率(L1-RSRP)，相应的网络设备接收来自UE的L1-RSRP。其中，RSRP为参考信号接收功率(reference signal receiving power)。
如果辅载波1属于FR2，且FR2上尚且没有已激活的载波，且UE未对辅载波1进行识别，则可执行S104，否则无需执行S104。
S105、网络设备向UE发送传输配置指示(transmission configuration indication，TCI)激活命令，相应的，UE等待并接收来自网络设备的TCI激活命令。其中，TCI激活命令可用于在辅载波1激活后，通过辅载波1接收物理下行控制信道(physical downlink control channel，PDCCH)和/或物理下行共享信道(physical downlink shared channel，PDSCH)。
如果辅载波1属于FR2，且FR2上尚且没有已激活的载波，则可执行S105，否则无需执行S105。或者，即使辅载波属于FR1，也可以在相应情况下执行S105。
S106、UE与辅载波1进行时频同步，或者说，UE与辅载波1进行精定时。
UE可在辅载波1上接收SSB，并根据接收的SSB与辅载波1进行时频同步。其中，如果辅载波1属于FR2，且辅载波1未被配置SSB，则无需执行S106，否则需要执行S106。
S107、UE测量辅载波1，得到信道状态信息(channel state information，CSI)或信道质量指示(channel quality indication，CQI)。
UE可在辅载波1上接收SSB，并对接收的SSB进行测量，以得到CSI或CQI。
S108、UE向网络设备发送CSI，相应的，网络设备接收来自UE的CSI。或者，UE向网络设备发送CQI，相应的，网络设备接收来自UE的CQI。
网络设备接收来自UE的CSI或CQI后，就能确定辅载波1已激活。
根据如上流程可知，S102、S103和S106，都是基于SSB进行的，因此这几个步骤的执行时间与SSB的发送周期或SMTC周期有关。而SSB的发送周期一般比较大，通常大于或等于20ms，这导致辅载波的激活时延也比较大，而目前尚且无法解决该问题。
鉴于此，提供本申请实施例的技术方案。在本申请实施例中，可以根据临时参考信号来辅助激活辅载波，从而减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。而且本申请实施例设置了根据临时参考信号激活辅载波的方式，即，网络设备和终端设备都能明确应该在何种情况下应用临时参考信号，以及如何应用临时参考信号，规范了网络设备和终端设备的行为，达成了终端设备和网络设备的共同认知。
图2A示出了本申请实施例提供的通信系统10中的一种通信网络架构，后续提供的图3或图4A所示的实施例均可适用于该架构。图2A所包括的网络设备，例如为通信系统10所包括的接入网设备20，图2A所包括的终端设备，例如为通信系统10所包括的通信装置30。网络设备与终端设备能够进行通信。
图2B示出了本申请实施例提供的通信系统10中的另一种通信网络架构。如图2B所示，通信系统包括核心网(new core，CN)和无线接入网(radio access network，RAN)。其中RAN中的网络设备(例如，基站)例如为通信系统10中的接入网设备20。RAN中的网络设备包括基带装置和射频装置。基带装置可以由一个或多个节点实现，射频装置可以从基带装置拉远独立实现，也可以集成基带装置中，或者部分拉远部分集成在基带装置中。RAN中的网络设备可以包括CU和DU，如果有多个DU，则多个DU可以由一个CU集中控制。CU和DU可以根据其具备的无线网络的协议层功能进行划分，例如分组数据汇聚协议(packet data convergence protocol，PDCP)层及以上协议层的功能设置在CU，PDCP以下的协议层，例如无线链路控制(radio link control，RLC)层和媒体接入控制(media access control，MAC)层等的功能设置在DU。需要说明的是，这种协议层的划分仅仅是一种举例，还可以在其它协议层划分。射频装置可以拉远，不放在DU中，也可以集成在DU中，或者部分拉远部分集成在DU中，本申请实施例不作任何限制。
图2C示出了本申请实施例提供的通信系统10中的另一种通信网络架构。相对于图2B所示的架构，还可以将CU的控制面(control plane，CP)和用户面(user plane，UP)分离，分成不同实体来实现，分别为控制面CU实体(CU-CP实体)和用户面CU实体(CU-UP实体)。在该网络架构中，CU产生的信令可以通过DU发送给终端设备，或者终端设备产生的信令可以通过DU发送给CU。DU可以不对该信令进行解析而直接通过协议层封装而透传给终端设备或CU。在该网络架构中，将CU划分为作为RAN侧的网络设备，此外，也可以将CU划分作为CN侧的网络设备，本申请实施例对此不做限制。
下面结合附图介绍本申请实施例提供的方法。在本申请的各个实施例中，“载波”与“小区”，这两个概念可以互换。例如，“辅载波”也可以称为“辅小区”，“主载波”也可以称为“主小区”。在本申请的各个实施例中，临时参考信号可满足如下的一项或多项的任意组合：1、临时参考信号例如为非周期的信号，或者也可以是周期性的信号。如果临时参考信号是周期性的信号，那么可选的，临时参考信号的发送周期可以小于SSB的发送周期；2、临时参考信号可用于辅载波的激活；3、临时参考信号可用于辅载波激活过程中的时频跟踪和/或AGC的调整；4、临时参考信号可由网络设备触发，该网络设备例如为接入网设备。5、跟踪之后不再将该临时参考信号用于辅载波的流程中。例如，可利用已有的信号作为临时参考信号，因为已有的参考信号本身有其他功能，而本申请实施例还利用该信号来完成临时参考信号的功能，因此本申请实施例就将本申请实施例提供的参考信号称为“临时”参考信号，因为该信号可能是“临时”作为本申请实施例的参考信号。又例如，也可以通过协议定义新的信号，该信号可以作为临时参考信号，如果是这种情况，那么“临时参考信号”这一名称也可能有所更改，例如可改为“专用(specific)参考信号”等。
根据如上介绍也可知，“临时参考信号”这一名称只是一种示例，该名称并不代表对于该信号本身的限制，换句话说，“临时参考信号”也可以有其他名称，例如也可以称为“参考信号”，或者称为“专用参考信号”，或者可称为“第一参考信号”或“A参考信号”等。另外，如果将“临时参考信号”称为“第一参考信号”，那么后文将要出现的“第一临时参考信号”也可以改称为“临时参考信号1”，以及后文将要出现的“第二临时参考信号”也可以改称为“临时参考信号2”等，以免名称不清晰。
作为一种示例，在本申请的各个实施例中，如果第一辅载波是FR1的载波，则当第一 辅载波满足以下条件时，则UE认为第一辅载波是已知辅载波：否则，UE认为第一辅载波是未知辅载波。
1、在接收到激活命令之前的一段时间内，UE上报过第一辅载波的有效测量结果。
2、在UE的激活过程中，以及在激活过程之前的一段时间内，UE测量的第一辅载波的参考信号始终保持可检测条件，可检测条件可包括以下至少一项：第一辅载波的参考信号的信噪比(signal to interference plus noise ratio，SINR)大于或等于第一预设值，第一辅载波的参考信号的干扰功率谱密度大于或等于第二预设值，或者，第一辅载波的参考信号接收功率大于或等于第三预设值等。
作为一种示例，在本申请的各个实施例中，如果第一辅载波是频率范围2(frequency range 2，FR2)的载波，当第一辅载波满足以下条件时，则UE认为第一辅载波是已知辅载波；否则UE认为第一辅载波是未知辅载波。
1、UE在收到最新的TCI激活命令和半静态CSI-RS激活命令之前一段时间内，上报过有效的参考信号的L3-RSRP测量。
2、UE在L3-RSRP上报之后收到第一辅载波的激活信令，并且该激活信令不晚于UE收到的TCI。
3、UE上报的SSB从L3-RSRP上报到有效的CQI上报期间始终保持可检测条件(关于可检测条件可参考前文)，并且TCI是基于最近上报的其中一个SSB配置的。
请参考图3，介绍本申请实施例提供的一种通信方法。在本申请实施例中，UE已经对待激活的第一辅载波进行了识别(或者说，第一辅载波已知)。关于UE对第一辅载波进行识别的过程，可参考图1B所示的流程的介绍。
S301、网络设备向UE发送激活命令，UE接收来自网络设备的激活命令。该激活命令可以指示激活某个辅载波，例如指示激活第一辅载波，第一辅载波是终端设备的聚合载波中的一个。在本申请实施例中，第一辅载波例如属于第一频率范围，第一频率范围例如为FR1。
例如，UE的第一辅载波处于非激活状态，而网络设备需要指示UE激活第一辅载波，则网络设备可以向UE发送该激活命令。该激活命令例如通过媒体接入控制(media access control，MAC)控制元素(control element，CE)发送，或者通过下行控制信息(downlink control information，DCI)发送，或者也可以通过其他方式发送。
S302、根据该UE对第一辅载波的测量周期，确定是否调整第一辅载波的AGC。
如果UE对第一辅载波的测量周期小于或等于第一测量周期，表明辅载波的测量周期比较小，则本次还可以继续应用之前确定的AGC，因此在这种情况下可以不调整第一辅载波的AGC，以节省UE的功耗，且简化辅载波的激活过程。第一测量周期可通过协议规定，或者可由网络设备配置等。例如第一测量周期为160ms，或者也可以是其他取值。
另外，一般来说，辅载波的激活时长等于T HARQ+T activation_time+T CSI_Reporting，其中，T HARQ表示图1B中的S101所需的时长，即，表示UE接收并处理来自基站的激活命令所需的时长，激活命令如果发送失败，则可能涉及到重发，因此所需的时间用T HARQ表示。T CSI_Reporting表示图1B中的S108所需的时长，即，表示UE测量得到CSI，以及向基站发送CSI所需的时长。T activation_time表示图1B中除了S101和S108之外的其他步骤所 需的总时长，因为图1B中的S102～S107可以视为辅载波的实际激活时长，因此T activation_time也可以称为辅载波的激活时长。在UE对第一辅载波的测量周期小于或等于第一测量周期的情况下，不调整第一辅载波的AGC，可选的，T activation_time(此时的T activation_time表示第一辅载波的实际激活时长)可以根据第一时长确定，第一时长例如为UE等待并获取(或者说，接收到)来自第一辅载波的第一个完整的临时RS突发集(burst)的时长。
作为T activation_time根据第一时长确定的一种可选的实施方式，T activation_time可以满足如下关系：
T activation_time＝T first_TempRS+5      (公式1)
其中，T first_TempRS表示第一时长。公式1只是一种示例，例如公式1中的数值5，也可以替换为其他数值，或者还可以替换为其他函数，或者公式1中的T first_TempRS+5也可以替换为f(T first_TempRS)，f(x)表示以x为变量的函数，该函数可能是加法函数，也可能是其他计算形式的函数。在这种情况下，第一辅载波的激活时长较短，能够提高辅载波的激活效率。
或者，如果UE对第一辅载波的测量周期大于第一测量周期，表明辅载波的测量周期较大，本次如果继续应用之前确定的AGC，可能导致AGC不够准确。因此在这种情况下，可以调整第一辅载波的AGC。如果使用SSB来实现对AGC的调整，SSB是按周期发送的，那么调整AGC所需的时间与SSB的发送周期或SMTC周期有关。而SSB的发送周期一般比较大，通常大于或等于20ms，这导致辅载波的激活时延也比较大。因此本申请实施例提出，可以通过临时(temporary)RS来调整AGC。临时RS可以是非周期性的信号，例如临时RS可以在UE有需求时发送，使得辅载波的激活时间不依赖于参考信号的发送周期，减小了辅载波的激活时延。或者，临时RS可以是非周期性的信号，例如临时RS的发送周期可以小于或等于SSB的发送周期，这也能减小辅载波的激活时延。
作为临时RS的一种实现方式，可采用跟踪参考信号(rracking reference signal，TRS)来作为临时RS。例如，在频率范围(frequency range，FR)1，TRS可占用2个时隙(slot)中的4个信道状态信息(channel state information reference signal，CSI-RS)资源；在FR2，TRS可占用2个时隙中的4个CSI-RS资源，或者可占用1个时隙中的2个CSI-RS资源。或者，除了TRS之外，也可采用其他信号来作为临时RS，本申请实施例对此不做限制。
因为本申请实施例中UE已对第一辅载波进行了识别，那么UE通过对第一辅载波的识别可以获得第一辅载波的符号级定时信息。在载波聚合场景中，由于UE在主载波上通信，因此主载波的定时信息对于UE来说是已知的，其中，主载波的定时信息包括主载波的系统帧号(system frame number，SFN)边界、时隙边界和OFDM符号边界等。无论UE的载波聚合方式是带内聚合方式还是带间聚合(inter-band)方式，UE都可以通过主载波的定时信息和辅载波的符号级定时信息推导出辅载波的全部定时信息。UE根据主载波的定时信息和辅载波的符号级定时信息推导出的辅载波的定时信息，因为可能不会很准确，因此可以称为辅载波的粗定时信息。例如，UE可以根据主载波的定时信息和第一辅载波的符号级定时信息推导出第一辅载波的粗定时信息。例如网络设备在第一辅载波上发送第 二临时RS，UE在获得第一辅载波的粗定时信息后，也可以正确接收来自第一辅载波的第二临时RS(或者说，在第一辅载波上接收来自网络设备的第二临时RS)，从而UE可以利用第二临时RS调整第一辅载波的AGC。在本申请的各个实施例中，UE根据临时RS调整第一辅载波的AGC，例如包括，UE根据该临时RS的接收信号功率，调节电平增益，使得该UE的输出信号保持在合适的幅度。
如果UE对第一辅载波的测量周期大于第一测量周期，则本申请实施例可以调整第一辅载波的AGC，以提高第一辅载波的AGC的准确性。且本申请实施例可以根据临时RS来调整第一辅载波的AGC，减小了对于SSB的发送周期的依赖，有利于提高辅载波的激活效率。
在这种情况下，如果UE的载波聚合方式为带内载波聚合(intra-band)，那么UE确定的第一辅载波的AGC，实际上也可以应用于该UE参与载波聚合的其他载波。因此UE在调整第一辅载波的AGC时，除了要参考第一辅载波上的临时RS外，还要参考该UE参与载波聚合的激活载波上的RS。鉴于此，如果根据测量周期确定要调整第一辅载波的AGC，且UE的载波聚合方式为带内载波聚合，则对于AGC的调整，本申请实施例提供几种方式，下面举例介绍。
方式一、AGC的调整与该UE的聚合载波中除第一辅载波外的其他载波相关，或者说，要求第一辅载波上的临时RS的发送时间要与该UE的聚合载波中的激活载波上的RS的发送时间对齐。该UE参与聚合的载波中的激活载波，可能有一个或多个，方式一是要使得网络设备在第一辅载波上发送临时RS的时间与网络设备在这一个或多个激活载波上发送RS的时间相同，可以认为，要求网络设备同时在多个载波上发送参考信号。
其中，两个载波上的信号的发送时间对齐，例如是指这两个载波上的信号的发送时间相同。例如，两个信号在同一个时隙(slot)内发送，认为这两个信号的发送时间相同；又例如，两个信号在同一个OFDM符号内发送，认为这两个信号的发送时间相同。该UE的激活载波上的RS，例如包括如下一项或多项：CSI-RS，SSB，或，临时RS。该UE的激活载波可以有一个或多个，那么其中的一个激活载波上的RS可以包括CSI-RS，或者包括SSB，或者包括临时RS，或者包括CSI-RS和SSB，或者包括SSB和临时RS，或者包括CSI-RS和临时RS，或者包括CSI-RS、SSB和临时RS。
现有协议中要求，对于FR1，如果UE的载波聚合方式为带内聚合方式，则带内聚合的所有的激活载波和待激活载波都需要在同一个时隙(slot)中发送SSB，这样UE才能根据在各个载波上接收的SSB调整AGC；对于FR2也是同样的，如果UE的载波聚合方式为带内聚合方式，则带内聚合的所有的激活载波和待激活载波都需要在同一个slot中发送SSB，这样UE才能根据在各个载波上接收的SSB调整AGC。
因此在方式一中，规定第一辅载波上的临时RS的发送时间与该UE的聚合载波中的激活载波上的RS的发送时间对齐，以使得本申请实施例的技术方案能够更好地与现有的协议兼容。而且通过使得各个载波上的参考信号的发送时间对齐，UE在各个载波上接收参考信号的时间也会相差不多，则UE可以基于最近接收的各个参考信号来调整AGC，使得对于AGC的调整更为准确，调整后的AGC可用于该UE参与聚合的各个载波。
方式二、AGC的调整与该UE的聚合载波中除第一辅载波外的其他载波不相关(或者说无关)，或者说，不要求第一辅载波上的临时RS的发送时间与该UE的聚合载波中的激活载波上的RS的发送时间对齐。
在方式二中，不规定第一辅载波上的临时RS的发送时间一定要与该UE的聚合载波中的激活载波上的RS的发送时间对齐，那么网络设备在发送各个载波上的参考信号时，可以使得第一辅载波上的临时RS的发送时间与该UE的聚合载波中的激活载波上的RS的发送时间对齐，也可以不必使得第一辅载波上的临时RS的发送时间与该UE的聚合载波中的激活载波上的RS的发送时间对齐，至于究竟是否对齐，例如网络设备可根据实际需求等因素确定。AGC的调整过程是有迟滞性的，如果第一辅载波上的临时RS的发送时间与该UE的聚合载波中的激活载波上的RS的发送时间不对齐，那么UE可能对于各个载波上的参考信号的接收时间不一致，则UE对于先接收的参考信号可以暂时存储，待各个载波上的参考信号都接收完毕后再基于接收的各个参考信号来调整AGC即可，这样调整后的AGC也可用于该UE参与聚合的各个载波。也就是说，由于AGC调整过程的迟滞性，实际上并不一定要求第一辅载波上的临时RS的发送时间与该UE的聚合载波中的激活载波上的RS的发送时间对齐，即使发送时间不对齐，UE也能实现对于AGC的调整。如果采用方式二，则在未增加UE的计算复杂度的情况下，减少了对于网络设备的限制，为网络设备带来了更大的实现灵活度。
对于方式一或方式二，T activation_time(此时的T activation_time表示第一辅载波的实际激活时长)都可以根据第二时长得到。但是在方式一和方式二中，第二时长的定义会有所不同，下面举例介绍。
如果采用方式一，则第二时长可以是第三时长和第四时长中的最大值。其中，第三时长例如为UE等待并获取(或者说，接收到)来自第一辅载波的第一个完整的临时RS burst的时长，第四时长例如为UE等待并获取(或者说，接收到)来自第二载波的第一个完整的RS burst的时长，第二载波例如包括该UE的激活载波。例如，如果该UE的激活载波的数量为1，则第四时长就是UE等待并获取(或者说，接收到)来自这一个载波的第一个完整的RS burst的时长。又例如，如果该UE的激活载波的数量大于1，则UE在这多个载波上等待并获取第一个完整的RS burst的时长可能相同，也可能不同，那么第四时长例如为这些时长中的最大值。例如，该UE的激活载波包括载波1和载波2，UE等待并获取来自载波1的第一个完整的RS burst的时长为时长1，UE等待并获取来自载波2的第一个完整的RS burst的时长为时长2，时长1小于时长2，则第四时长就取时长2。
在这种情况下，作为T activation_time根据第二时长确定的一种可选的实施方式，T activation_time可以满足如下关系：
T activation_time＝max{T first_TempRS,T first_RS}+T TempRS+5    (公式2)
其中，T first_TempRS表示第三时长，T first_RS表示第四时长，max{x,y}表示取x和y中的最大值，max{T first_TempRS,T first_RS}表示第二时长，T TempRS表示该UE等待并获取来自第一辅载波的一个完整的临时RS burst的时长。需注意的是，第三时长表示的是UE等待并获取(或者说，接收到)来自第一辅载波的第一个完整的临时RS burst的时长，而T TempRS表示的是该UE等待并获取来自第一辅载波的一个完整的临时RS burst的时长，即，第三时长强调的是“第一个完整的临时RS burst”，而T TempRS表示的是“一个完整的临时RS burst”，并未强调该临时RS burst是第一个。
另外，公式2只是一种示例，例如公式2中的数值5，也可以替换为其他数值，或者还可以替换为其他函数，或者公式2中的max{T first_TempRS,T first_RS}+T TempRS+5也可以 替换为
Figure PCTCN2021071540-appb-000001
f(x)表示以x为变量的函数，该函数可能是加法函数，也可能是其他计算形式的函数。
如果采用方式二，则第二时长例如为UE等待并获取(或者说，接收到)来自第一辅载波的第一个完整的临时RS burst的时长。也就是说，在方式二下，可以不必考虑其他载波上的参考信号的接收过程，而根据该UE在第一辅载波上的临时RS的接收过程就可以确定第二时长，这使得对于第二时长的确定过程更为简单。
在这种情况下，作为T activation_time根据第二时长确定的一种可选的实施方式，T activation_time可以满足如下关系：
T activation_time＝T first_TempRS+T TempRS+5    (公式3)
其中，T first_TempRS表示第二时长，T TempRS的解释可参考对于公式2的介绍。另外，公式3只是一种示例，例如公式3中的数值5，也可以替换为其他数值，或者还可以替换为其他函数，或者公式3中的T first_TempRS+T TempRS+5也可以替换为f(T first_TempRS,T TempRS)，f(x)表示以x为变量的函数，该函数可能是加法函数，也可能是其他计算形式的函数。
方式三、UE向网络设备发送能力信息，以通过该能力信息指示选择方式一或方式二。
如果采用方式三，那么UE还可以向网络设备发送能力信息，相应的，网络设备可以接收来自UE的该能力信息。该能力信息可以指示AGC的调整与除第一辅载波外的其他载波相关(或者，该能力信息可以请求在为该UE配置的各个载波发送参考信号的时间相同)，或者，该能力信息可以指示AGC的调整与除第一辅载波外的其他载波无关(或者，该能力信息可以指示不要求在为该UE配置的各个载波发送参考信号的时间相同)。例如，UE可以在接收S301的激活命令后向网络设备发送该能力信息，或者，UE也可以在接收该激活命令前向网络设备发送该能力信息，本申请实施例对于该能力信息的发送时间不做限制。
网络设备接收该能力信息后，如果该能力信息指示AGC的调整与除第一辅载波外的其他载波相关，或者该能力信息请求在为该UE配置的各个载波发送参考信号的时间相同，那么网络设备可以按照前述的方式一来处理，即，网络设备在第一辅载波上发送临时RS的时间与网络设备在该UE的激活载波上发送RS的时间相同。而如果该能力信息指示AGC的调整与除第一辅载波外的其他载波无关，或者指示不要求在为该UE配置的各个载波发送参考信号的时间相同，那么网络设备可以按照前述的方式二来处理，即，网络设备在第一辅载波上发送临时RS的时间与网络设备在该UE的激活载波上发送RS的时间可以相同也可以不同。
如果采用方式三，则使得UE的AGC调整过程更为符合UE的能力，例如有些UE不支持方式二，那么这样的UE可以通过能力信息指示AGC的调整与除第一辅载波外的其他载波相关，从而网络设备可以按照方式一来处理，尽量避免由于网络设备对于参考信号的发送过程不符合UE的能力需求而导致UE对于AGC的调整失败。
S303、网络设备在第一辅载波上发送第一临时RS，相应的，UE接收来自第一辅载波的第一临时RS(或者说，UE在第一辅载波上接收来自网络设备的第一临时RS)。
S304、UE根据第一临时RS与第一辅载波进行时频同步。其中，UE与第一辅载波进 行时频同步，也可以理解为，UE与第一辅载波进行时频跟踪或精定时，或者理解为，UE获得第一辅载波的精定时信息。
如果UE无需调整AGC，那么UE可执行S303和S304；如果UE需要调整AGC，那么UE可先调整AGC，在调整AGC后执行S303和S304。
在前文已介绍了UE获得第一辅载波的粗定时信息的方式。例如网络设备在第一辅载波上发送第一临时RS，在获得第一辅载波的粗定时信息后，UE也可以正确接收来自第一辅载波的第一临时RS，从而UE可以利用第一临时RS与第一辅载波进行时频同步。UE利用临时RS与第一辅载波进行时频同步，可以认为是获得第一辅载波的精定时信息。其中，第一临时RS与前文所述的第二临时RS，可以是同一个信号，也可以是不同的信号。
另外，第一辅载波的激活过程可能还需执行其他一些步骤，对此可参考图1B所示的流程的介绍。
在本申请实施例中，UE可以根据临时RS来辅助激活辅载波，例如UE可以根据临时RS调整AGC，也可以根据临时RS来跟第一辅载波进行时频同步，这样减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。
图3所示的实施例介绍的是UE已对待激活的辅载波进行了识别的情况，接下来请参考图4A，介绍本申请实施例提供的另一种通信方法，在该方法中，UE未对待激活的第一辅载波进行识别(或者说，第一辅载波未知)。
S401、网络设备向UE发送激活命令，UE接收来自网络设备的激活命令。该激活命令可以指示激活某个辅载波，例如指示激活第一辅载波，第一辅载波是终端设备的聚合载波中的一个。在本申请实施例中，第一辅载波例如属于第一频率范围，第一频率范围例如为FR1。
关于S401的更多内容，可参考对于图3所示的实施例中的S301的介绍。
S402、UE确定是否调整第一辅载波的AGC，或者，UE确定第一辅载波的AGC的调整方式(或者说，UE确定调整第一辅载波的AGC，且确定第一辅载波的AGC的调整方式)。
例如，UE可以根据网络设备的指示确定调整第一辅载波的AGC，或确定第一辅载波的AGC的调整方式。例如，网络设备向该UE发送第一指示信息，相应的，该UE接收来自网络设备的第一指示信息，第一指示信息可指示不调整第一辅载波的AGC，则UE根据第一指示信息确定不调整第一辅载波的AGC；或者，第一指示信息可指示调整第一辅载波的AGC，则UE根据第一指示信息确定要调整第一辅载波的AGC；或者，第一指示信息可指示第一辅载波的AGC调整方式(例如第一辅载波的AGC的调整方式为根据临时RS调整第一辅载波的AGC，或者第一辅载波的AGC的调整方式为根据SSB调整第一辅载波的AGC等)，则UE根据第一指示信息可以确定第一辅载波的AGC的调整方式，实际上UE根据第一指示信息也就隐式确定了需要调整第一辅载波的AGC；或者，第一指示信息指示调整第一辅载波，以及指示第一辅载波的AGC的调整方式，那么UE根据第一指示信息可以确定调整第一辅载波，且确定第一辅载波的AGC的调整方式。例如，第一指示信息可以携带在S401的激活命令中，或者第一指示信息也可以通过除激活命令外的其他消息发送。
或者，UE也可以自行确定是否调整第一辅载波的AGC，或者，UE可以自行确定第 一辅载波的AGC的调整方式，例如UE可根据相应的信息确定是否调整第一辅载波的AGC，或确定第一辅载波的AGC的调整方式。下面介绍UE如何自行确定是否调整第一辅载波的AGC，或确定第一辅载波的AGC的调整方式。
1、UE确定是否调整第一辅载波的AGC。
作为UE确定是否调整第一辅载波的AGC的一种实施方式，UE可以根据该UE的载波聚合方式，确定是否调整第一辅载波的AGC。
可选的，如果该UE的载波聚合方式为带内聚合的方式，那么UE可进一步结合该UE在第一辅载波上的发射功率和/或该UE在激活载波上的发射功率，来确定是否调整第一辅载波的AGC。
例如，如果该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值小于或等于第一阈值，表明该UE在第一辅载波和在激活载波上的发射功率之差并不大，则激活载波上的AGC也可以用于第一辅载波，因此在这种情况下，该UE可以不调整第一辅载波的AGC，以简化第一辅载波的激活过程。而如果该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值大于第一阈值，表明该UE在第一辅载波和在激活载波上的发射功率之差较大，激活载波上的AGC如果用于第一辅载波，会导致第一辅载波上的AGC不够准确，因此在这种情况下，该UE可以调整第一辅载波的AGC。通过这种方式，可以使得第一辅载波的AGC更为准确。
而如果该UE的载波聚合方式为带间聚合的方式，表明各个载波上的信号到达UE的时间差比较大，或者说，UE对于各个载波上的信号的接收时间差比较大，UE的激活载波的AGC可能无法用于第一辅载波，因此在这种情况下，UE可以调整第一辅载波的AGC，使得第一辅载波的AGC更为准确。
2、UE确定第一辅载波的AGC的调整方式。
作为UE确定第一辅载波的AGC的调整方式的一种实施方式，UE根据该UE的载波聚合方式，确定第一辅载波的AGC的调整方式。
可选的，如果该UE的载波聚合方式为带内聚合的方式，那么UE可进一步结合第一信息，来确定第一辅载波的AGC调整方式。例如，第一信息可包括该UE的聚合载波信息，或者，第一信息可包括该UE在第一辅载波上的发射功率和/或该UE在激活载波上的发射功率，以及包括该UE的载波聚合信息。其中，该UE的载波聚合信息可以指示该UE参与聚合的载波是连续载波或非连续载波。
例如，第一信息包括该UE的聚合载波信息。
如果该UE参与聚合的载波为连续载波，这表明各个载波上的信号到达UE的时间差比较小，或者说，UE对于各个载波上的信号的接收时间差比较小，那么根据图3所示的实施例的介绍可知，UE可以根据主载波的定时信息和第一辅载波的符号级定时信息获得第一辅载波的粗定时信息，UE根据第一辅载波的粗定时信息能够在第一辅载波上正确接收临时RS，因此在这种情况下，UE可以根据第一辅载波上的临时RS来调整第一辅载波的AGC。或者说在这种情况下，第一辅载波的AGC的调整方式为根据临时RS调整第一辅载波的AGC。例如，网络设备在第一辅载波上发送第二临时RS，UE获得第一辅载波的粗定时信息后，可以在第一辅载波上接收来自网络设备的第二临时RS，从而UE可以根据第二临时RS调整第一辅载波的AGC。
或者，如果该UE参与聚合的载波为非连续载波，这表明各个载波上的信号到达UE 的时间差比较大，或者说，UE对于各个载波上的信号的接收时间差比较大，那么UE根据主载波的定时信息和第一辅载波的符号级定时信息所获得的第一辅载波的粗定时信息可能不够准确，UE根据第一辅载波的粗定时信息可能无法在第一辅载波上接收到来自网络设备的临时RS，那么在这种情况下，用临时RS来调整AGC的方式不可行。因此在这种情况下，UE可以根据第一辅载波上的其他RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据其他RS调整第一辅载波的AGC。其他RS例如包括SSB和/或CSI-RS等。例如UE可以在第一辅载波上盲检测SSB和/或CSI-RS，以完成对于第一辅载波的AGC的调整。
又例如，第一信息包括该UE在第一辅载波上的发射功率和/或该UE在激活载波上的发射功率，以及包括该UE的载波聚合信息。
如果该UE参与聚合的载波为连续载波，这表明各个载波上的信号到达UE的时间差比较小，或者说，UE对于各个载波上的信号的接收时间差比较小，那么UE可以根据主载波的定时信息获得第一辅载波的粗定时信息，UE根据第一辅载波的粗定时信息能够在第一辅载波上正确接收临时RS。在这种情况下，如果该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值大于第一阈值，则UE需要调整第一辅载波的AGC，那么UE可以根据第一辅载波上的临时RS来调整第一辅载波的AGC。或者说在这种情况下，第一辅载波的AGC的调整方式为根据临时RS调整第一辅载波的AGC。例如，网络设备在第一辅载波上发送第二临时RS，UE获得第一辅载波的粗定时信息后，可以在第一辅载波上接收来自网络设备的第二临时RS，从而UE可以根据第二临时RS调整第一辅载波的AGC。或者，如果该UE参与聚合的载波为连续载波，但该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值小于或等于第一阈值，则激活载波的AGC也可以用于第一辅载波，那么该UE也可以不必调整第一辅载波的AGC，以简化辅载波的激活过程。
或者，如果该UE参与聚合的载波为非连续载波，这表明各个载波上的信号到达UE的时间差比较大，或者说，UE对于各个载波上的信号的接收时间差比较，那么UE根据主载波的定时信息所获得的第一辅载波的粗定时信息可能不够准确，UE根据第一辅载波的粗定时信息可能无法在第一辅载波上接收到来自网络设备的临时RS。那么在这种情况下，如果该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值大于第一阈值，则UE需要调整第一辅载波的AGC，但用临时RS来调整第一辅载波的AGC的方式是不可行的。因此在这种情况下，UE可以根据第一辅载波上的其他RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据其他RS调整第一辅载波的AGC。其他RS例如包括SSB和/或CSI-RS等。例如UE可以在第一辅载波上盲检测SSB和/或CSI-RS，以完成对于第一辅载波的AGC的调整。或者，虽然该UE参与聚合的载波为非连续载波，但该UE在第一辅载波上的发射功率与该UE在激活载波上的发射功率之间的差值小于或等于第一阈值，则激活载波的AGC也可以用于第一辅载波，那么该UE也可以不必调整第一辅载波的AGC，以简化辅载波的激活过程。
或者，如果该UE参与聚合的载波为非连续载波，那么第一信息除了包括该UE在第一辅载波上的发射功率和/或该UE在激活载波上的发射功率，以及包括该UE的载波聚合信息外，还可以包括第一辅载波与该UE的激活载波的定时偏差。例如，如果该UE参与聚合的载波为非连续载波，且该UE在第一辅载波上的发射功率与该UE在激活载波上的 发射功率之间的差值大于第一阈值，则UE需要调整第一辅载波的AGC。此时，如果第一辅载波与该UE的所有激活载波中的每个激活载波的定时偏差(即，第一辅载波的定时与该UE的所有激活载波中的每个激活载波的定时之间的偏差)均大于CP时长，那么无论UE是基于哪个激活载波的定时信息获得第一辅载波的粗定时信息，所获得的第一辅载波的粗定时信息都可能不够准确，导致无法使用临时RS来调整第一辅载波的AGC。因此，如果第一辅载波与该UE的所有激活载波的定时偏差均大于CP时长，则UE可以根据第一辅载波上的其他RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据其他RS调整第一辅载波的AGC。其他RS例如包括SSB和/或CSI-RS等。例如UE可以在第一辅载波上盲检测SSB和/或CSI-RS，以完成对于第一辅载波的AGC的调整。或者，如果第一辅载波与该UE的至少一个激活载波的定时偏差小于或等于CP时长，那么UE可以基于至少一个激活载波中的一个或多个激活载波的定时信息和第一辅载波的符号级定时信息获得第一辅载波的粗定时信息，根据第一辅载波的粗定时信息，该UE能够在第一辅载波上接收来自网络设备的临时RS，因此UE可以根据第一辅载波上的临时RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据临时RS调整第一辅载波的AGC。例如，网络设备在第一辅载波上发送第二临时RS，UE获得第一辅载波的粗定时信息后，可以在第一辅载波上接收来自网络设备的第二临时RS，从而UE可以根据第二临时RS调整第一辅载波的AGC。通过对CP时长的进一步考虑，可以使得UE有一定机会使用临时RS调整第一辅载波的AGC，提高第一辅载波的激活效率。
如上介绍的是如果该UE的载波聚合方式为带内聚合的方式，下面介绍，如果该UE的载波聚合方式为带间聚合的方式，则UE如何确定第一辅载波的AGC调整方式。
例如，如果该UE的载波聚合方式为带间聚合的方式，这表明各个载波上的信号到达UE的时间差比较大，或者说，UE对于各个载波上的信号的接收时间差比较，UE需要调整第一辅载波的AGC。而UE根据主载波的定时信息所获得的第一辅载波的粗定时信息可能不够准确，UE根据第一辅载波的粗定时信息可能无法在第一辅载波上接收到来自网络设备的临时RS。那么在这种情况下，UE用临时RS来调整第一辅载波的AGC的方式是不可行的。因此在这种情况下，UE可以根据第一辅载波上的其他RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据其他RS调整第一辅载波的AGC。其他RS例如包括SSB和/或CSI-RS等。例如UE可以在第一辅载波上盲检测SSB和/或CSI-RS，以完成对于第一辅载波的AGC的调整。
或者，如果该UE的载波聚合方式为带间聚合的方式，且第一辅载波与该UE的所有激活载波中的每个激活载波的定时偏差均大于CP时长，那么无论UE是基于哪个激活载波获得第一辅载波的粗定时信息，所获得的第一辅载波的粗定时信息都可能不够准确，导致无法使用临时RS来调整第一辅载波的AGC。因此，如果第一辅载波与该UE的所有激活载波的定时偏差均大于CP时长，则UE可以根据第一辅载波上的其他RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据其他RS调整第一辅载波的AGC。其他RS例如包括SSB和/或CSI-RS等。例如UE可以在第一辅载波上盲检测SSB和/或CSI-RS，以完成对于第一辅载波的AGC的调整。或者，如果第一辅载波与该UE的至少一个激活载波的定时偏差小于或等于CP时长，那么UE可以基于至少一个激活载波中的一个或多个激活载波的定时信息获得第一辅载波的粗定时信息，根据第 一辅载波的粗定时信息，该UE能够在第一辅载波上接收来自网络设备的临时RS，因此UE可以根据第一辅载波上的临时RS来调整第一辅载波的AGC，或者说在这种情况下，第一辅载波的AGC的调整方式为根据临时RS调整第一辅载波的AGC。例如，网络设备在第一辅载波上发送第二临时RS，UE获得第一辅载波的粗定时信息后，可以在第一辅载波上接收来自网络设备的第二临时RS，从而UE可以根据第二临时RS调整第一辅载波的AGC。通过对CP时长的进一步考虑，可以使得UE有一定机会使用临时RS调整第一辅载波的AGC，提高第一辅载波的激活效率。
S403、UE对第一辅载波进行识别。
因为本申请实施例中，第一辅载波是未知的，表明UE尚未对第一辅载波进行识别，因此，UE如果根据S402的确定过程，确定需要调整AGC，则UE在调整AGC后可以对第一辅载波进行识别；或者，UE如果根据S402的确定过程确定无需调整AGC，则UE可以对第一辅载波进行识别。
例如，在待激活的辅载波未知的情况下，目前规定的计算T activation_time(T activation_time表示待激活的辅载波的实际激活时长)的方式如下：
Figure PCTCN2021071540-appb-000002
其中，T firstSSB_MAX+T SMTC_MAX表示基于SSB调整AGC的时长，需要两次基于SSB调整AGC的过程。公式4里包括两个T rs，其中的一个T rs表示对待激活的辅载波进行识别的时长，其中的另一个T rs表示UE与待激活的辅载波进行时频同步的时长。另外，公式4只是一种示例，例如公式4中的数值5，也可以替换为其他数值，或者还可以替换为其他函数，或者公式4中的T firstSSB_MAX+T SMTC_MAX+2×T rs+5ms也可以替换为f(T firstSSB_MAX,T SMTC_MAX,T rs)，f(x)表示以x为变量的函数，该函数可能是加法函数，也可能是其他计算形式的函数。
UE如果根据临时RS调整AGC，那么T firstSSB_MAX+T SMTC_MAX可以改为表示基于临时RS调整AGC的时长，同样需要两次基于临时RS调整AGC的过程。在两次基于临时RS调整AGC后，UE可以对第一辅载波进行识别。
或者，UE如果根据其他RS调整AGC，这里以其他RS为SSB为例，那么在两次基于SSB调整AGC后，UE可以对第一辅载波进行识别。
关于UE对第一辅载波进行识别的过程，可参考图1B所示的流程的介绍。UE在对第一辅载波进行识别后，就获得了第一辅载波的符号级定时信息。
S404、网络设备在第一辅载波上发送第一临时RS，相应的，UE接收来自第一辅载波的第一临时RS(或者说，UE在第一辅载波上接收来自网络设备的第一临时RS)。
S405、UE根据第一临时RS与第一辅载波进行时频同步。其中，UE与第一辅载波进行时频同步，也可以理解为，UE与第一辅载波进行时频跟踪或精定时，或者理解为，UE获得第一辅载波的精定时信息。
在前文已介绍了UE获得第一辅载波的粗定时信息的方式。例如网络设备在第一辅载波上发送第一临时RS，在获得第一辅载波的粗定时信息后，UE也可以正确接收来自第一辅载波的第一临时RS，从而UE可以利用第一临时RS与第一辅载波进行时频同步。其中，第一临时RS与前文所述的第二临时RS，可以是同一个信号，也可以是不同的信号。
可以看到，即使UE未调整AGC，或者UE根据其他RS调整了AGC，UE仍然可以根据临时RS来与第一辅载波进行时频同步，这样也能在一定程度上减小辅载波的激活时 延。那么，如果UE根据其他RS调整了AGC，网络设备应该在何时发送临时RS(例如，第一临时RS)以供UE进行时频同步，就是需要讨论的问题。如果网络设备发送临时RS的时间过早，则UE即使接收了临时RS，也无法及时进行时频同步，导致该临时RS对UE来说是冗余信息，白白浪费了传输资源。而如果网络设备发送临时RS的时间过晚，UE又无法及时进行时频同步，会增大第一辅载波的激活时延。因此，如果UE根据其他RS调整了AGC，对于网络设备应该在何时发送临时RS以供UE进行时频同步，本申请实施例提出，在满足第一条件的情况下，网络设备可以向UE发送临时RS。第一条件有不同的实现方式，下面举例介绍。
1、第一条件的第一种实现方式。
第一条件为从激活命令发送完毕开始，到第三个SSB测量定时配置(SSB measurement timing configuration，SMTC)周期结束。
例如，网络设备可以根据最差的AGC调整过程和辅载波识别的时间来估计UE完成AGC调整和第一辅载波的识别的时间，然后再触发临时RS的发送。例如，网络设备认为从发送S401的激活命令开始，经过3个SMTC周期后，UE就会完成AGC调整和对第一辅载波的识别，因此网络设备在从激活命令发送完毕开始，到第三个SMTC周期结束时，可以发送临时RS，例如发送第一临时RS。在这种情况下，第一辅载波的激活时间可以满足如下关系：
T activation＝T firstSSB_MAX+T SMTC_MAX+T rs+T first_TempRS+5ms    (公式5)
其中，T firstSSB_MAX+T SMTC_MAX表示基于其他RS(例如SSB)调整AGC的时长，T rs表示对待激活的辅载波进行识别的时长，T first_TempRS表示UE等待并获取(或者说，接收到)来自第一辅载波的第一个完整的临时RS burst的时长。另外，公式5只是一种示例，例如公式5中的数值5，也可以替换为其他数值，或者还可以替换为其他函数，或者公式5中的T firstSSB_MAX+T SMTC_MAX+T rs+T first_TempRS+5ms也可以替换为f(T firstSSB_MAX,T SMTC_MAX,T rs,T first_TempRS)，f(x)表示以x为变量的函数，该函数可能是加法函数，也可能是其他计算形式的函数。
另外，UE在与第一辅载波完成时频同步后会测量第一辅载波，得到CSI或CQI，且UE会向网络设备发送CSI或CQI。那么网络设备如果接收了来自UE的CSI或CQI，表明UE已经完成了与第一辅载波的时频同步，因此网络设备如果接收了来自UE的CSI或CQI，可以停止发送第一临时RS，以节省信令开销。
采用第一条件的第一种实现方式，可以为UE的AGC调整过程和第一辅载波的识别过程预留较为充足的时间。
2、第一条件的第二种实现方式。
第一条件为从激活命令发送完毕开始，到第一个SMTC周期结束。
在某些情况下，UE的AGC调整过程和第一辅载波的识别过程可能并不需要3个SMTC周期，例如可能只需一个SMTC周期就可以完成。因此为了减小辅载波的激活时延，在第一条件的第二种实现方式下，网络设备为UE的AGC调整过程和第一辅载波的识别过程预 留的时间较短，UE在AGC调整过程和第一辅载波的识别过程完毕后可以及时接收来自网络设备的临时RS，从而能够及时与第一辅载波进行时频同步。
例如，在第一条件的第二种实现方式下，在满足第一条件时网络设备可以连续发送临时RS(例如第一临时RS)，UE在与第一辅载波完成时频同步后会测量第一辅载波，得到CSI或CQI，且UE会向网络设备发送CSI或CQI。那么网络设备如果接收了来自UE的CSI或CQI，表明UE已经完成了与第一辅载波的时频同步，因此网络设备如果接收了来自UE的CSI或CQI，可以停止发送第一临时RS，以节省信令开销。
通过采用第一条件的第二种实现方式，能够使得UE尽快与第一辅载波进行时频同步，减小第一辅载波的激活时延。
3、第一条件的第三种实现方式。
第一条件为网络设备接收来自UE的第二指示信息，第二指示信息可指示已完成对第一辅载波的识别。
UE在完成对第一辅载波的识别后，可以向网络设备发送第二指示信息，网络设备接收第二指示信息后，就可以发送临时RS(例如第一临时RS)，以供UE与第一辅载波进行时频同步。
例如，第二指示信息可通过SSB索引(index)实现。UE的AGC调整过程和第一辅载波的识别过程，可能都是根据来自网络设备的其他RS完成的，其他RS例如为SSB。那么UE向网络设备发送SSB的索引，就表明UE已识别了网络设备所发送的SSB，因此网络设备就能明确UE已经完成了对第一辅载波的识别。
又例如，第二指示信息可通过SR实现。SR原本是用于UE向网络设备请求资源，而UE向网络设备告知已完成对第一辅载波的识别，实际上也是要触发网络设备发送临时RS以供UE与第一辅载波进行时频同步，因此第二指示信息也可以视为隐式请求资源，那么通过SR来作为第二指示信息，既复用了SR，且也未脱离SR原本的功能。
或者，第二指示信息也可以通过其他已有的信息实现，通过已有的信息来作为第二指示信息，无需引入新的信息，使得本申请实施例的技术方案更够更好地与现有的协议兼容。或者，第二指示信息也可以是新引入的信息，例如是专用于指示UE已完成对待激活的辅载波的识别的信息，通过新引入的信息作为第二指示信息，使得第二指示信息更为明确。
同样的，UE在与第一辅载波完成时频同步后会测量第一辅载波，得到CSI或CQI，且UE会向网络设备发送CSI或CQI。那么网络设备如果接收了来自UE的CSI或CQI，表明UE已经完成了与第一辅载波的时频同步，因此网络设备如果接收了来自UE的CSI或CQI，可以停止发送第一临时RS，以节省信令开销。
另外，第一辅载波的激活过程可能还需执行其他一些步骤，对此可参考图1B所示的流程的介绍。
在本申请实施例中，UE可以根据临时RS来辅助激活辅载波，例如UE可以根据临时RS调整AGC，也可以根据临时RS来跟第一辅载波进行时频同步，这样减小了激活辅载波的过程对于SSB的依赖，则激活辅载波的过程也无需依赖于SSB的发送周期，加快了辅载波的激活过程，减小了辅载波激活过程的时延。而且UE在无法根据临时RS激活辅载波的情况下，还是可以继续根据SSB等参考信号来激活辅载波，为辅载波的激活提供更多种选择，提高了辅载波的激活成功率。
为了更好地理解本申请实施例所提供的临时参考信号应用于辅载波的激活过程的优 势，下面通过几个示例来介绍使用临时参考信号进行辅载波激活与使用SSB进行辅载波激活的区别。在下面的几个示例中，以待激活的辅载波的频率属于FR1为例。
请参考图4B和4C，图4B为使用SSB进行辅载波激活的一种示意图，图4C为使用本申请实施例提供的临时参考信号进行辅载波激活的一种示意图。图4B或图4C的第一行，画斜线的方框代表SSB的发送时间，空白方框代表不发送SSB的时间，由此也能看出SSB的发送周期。图4B和4C中的第二行和第三行，表示相对于第一行的时间关系。例如图4C第二行中的AGC表示，AGC功能的时间与第一行中的SSB的时间上的对应关系。图4C的第一行，画横线的方框表示临时参考信号的发送时间，图4C以临时参考信号是非周期的信号为例。网络设备如果指示UE激活某个辅载波，则可以向UE发送激活命令，UE接收激活命令后可以进入对该辅载波的激活流程。例如UE会对该激活命令进行处理，在处理完毕激活命令后，UE可以调整AGC，在AGC调整完毕后UE可检测同步信号以识别该辅载波，之后UE可以与该辅载波进行时频同步，在完成时频同步后，UE可对该辅载波进行测量，以得到CSI(或CQI)，并向网络设备发送CSI(或CQI)，由此完成辅载波的激活流程。当然辅载波的激活流程还可能包括其他一些步骤，具体可参考前文的介绍。图4B或图4C中，箭头表示网络设备发送激活命令的时间，如果忽略激活命令的传输时延，则该箭头也表示UE接收该激活命令的时间。T HARQ表示UE接收并处理该激活命令所需的时长。AGC表示UE进行AGC调整的时间。同步信号检测表示UE检测同步信号的时间，同步信号例如包括PSS/SSS，其中，如果待激活的辅载波已知，则无需进行同步信号检测。时频同步表示的是前述的实施例所介绍的UE进行时频同步的时间，时频同步也可以表示为时频跟踪或精定时。上报CSI是指UE向网络设备发送CSI的时间，或者，UE向网络设备发送的也可以是CQI，图4B和图4C是以CSI为例。
图4B中，在辅载波未知或辅载波已知的情况下，AGC与第二个SSB的发送时间对齐，表明UE可根据在第二个SSB的发送时间内接收的SSB进行AGC；在辅载波未知的情况下，同步信号检测与第三个SSB的发送时间对齐，表明UE可对在第三个SSB的发送时间内接收的PSS/SSS进行检测，在辅载波已知的情况下，没有同步信号检测过程；在辅载波未知的情况下，时频同步过程与第四个SSB的发送时间对齐，表明UE可根据在第四个SSB的发送时间内接收的SSB与该辅载波进行时频同步，在辅载波已知的情况下，时频同步过程与第三个SSB的发送时间对齐，表明UE可根据在第三个SSB的发送时间内接收的SSB与该辅载波进行时频同步。可见，在使用SSB激活辅载波时，UE需要按照SSB的发送周期接收SSB，从而根据SSB调整AGC、检测PSS/SSS、以及进行时频同步等。SSB的发送周期较长，导致辅载波的激活时延也较长。其中，第二个SSB的发送时间是指图4B中从左至右的第二个画斜线的方框代表的时间，第三个SSB的发送时间是指图4B中从左至右的第三个画斜线的方框代表的时间，第四个SSB的发送时间是指图4B中从左至右的第四个画斜线的方框代表的时间。
图4C中，在辅载波未知或辅载波已知的情况下，AGC与第一个临时参考信号的发送时间对齐，表明UE可根据在第一个临时参考信号的发送时间内接收的临时参考信号进行AGC；在辅载波未知的情况下，同步信号检测与第二个SSB的发送时间对齐，表明UE可对在第二个SSB的发送时间内接收的PSS/SSS进行检测，在辅载波已知的情况下，没有同步信号检测过程；在辅载波未知的情况下，网络设备可以不发送图4C所示的第二个临时参考信号，而发送图4C所示的第三个临时参考信号，时频同步过程与第三个临时参考信 号的发送时间对齐，表明UE可根据在第三个临时参考信号的发送时间内接收的临时参考信号与该辅载波进行时频同步，在辅载波已知的情况下，网络设备可以发送图4C所示的第二个临时参考信号，图4C所示的第三个临时参考信号可以发送也可以不发送，时频同步过程与第二个临时参考信号的发送时间对齐，表明UE可根据在第二个临时参考信号的发送时间内接收的临时参考信号与该辅载波进行时频同步。需要注意的是，如果使用临时参考信号来激活辅载波，且辅载波已知，那么网络设备可以继续发送SSB，或者也可以不发送SSB。之所以在图4C中依然画出SSB，是为了更好地与采用SSB激活辅载波的方式进行比较。
可见，临时参考信号并不需要按照周期来发送，网络设备可以在UE有需求时发送临时参考信号，则UE可以较快地调整AGC以及进行时频同步等，明显减小了辅载波的激活时延。其中，临时参考信号由于是非周期的信号，并不需要周期性为其预留发送时间，因此前文所述的“临时参考信号的发送时间”，也可以替换为“临时参考信号”。另外，第一个临时参考信号的发送时间是指图4C中从左至右的第一个画横线的方框代表的时间，第二个临时参考信号的发送时间是指图4C中从左至右的第二个画横线的方框代表的时间，第三个临时参考信号的发送时间是指图4C中从左至右的第三个画横线的方框代表的时间。
另外，需要注意的是，在图4C中，网络设备在UE的T HARQ结束时就发送了临时参考信号，即，T HARQ的结束时间与网络设备发送第一个临时参考信号的起始时间是对齐的。但这只是一种示例，实际上网络设备也可能在UE的T HARQ结束后一段时间才会发送临时参考信号，如果是这种情况，则UE的T HARQ的结束时间可能早于图4C中的第一个临时参考信号的发送时间。另外，图4C中，UE在接收临时参考信号后就开始调整AGC，即，UE的AGC调整的起始时间与网络设备发送第一个临时参考信号的起始时间是对齐的，这只是一种示例，还有可能，UE会在网络设备发送临时参考信号之后的一段时间才开始调整AGC，也就是说UE可能需要一定的反应时间(或者称为处理时间)，如果是这种情况，则网络设备发送第一个临时参考信号的起始时间会早于UE的AGC调整的开始时间。同理，图4C中，以辅载波已知的情况为例，UE在接收临时参考信号后就开始进行时频同步，即，UE的时频同步的起始时间与网络设备发送第二个临时参考信号的起始时间是对齐的，这只是一种示例，还有可能，UE会在网络设备发送临时参考信号之后的一段时间才开始进行时频同步，也就是说UE可能需要一定的反应时间(或者称为处理时间)，如果是这种情况，则网络设备发送第二个临时参考信号的起始时间会早于UE的时频同步的起始时间。另外在图4C中，第一个临时参考信号和第二个临时参考信号在时域上是相邻的，即，网络设备连续发送了第一个临时参考信号和第二个临时参考信号，这也只是一种示例，还有可能，网络设备在发送第一个临时参考信号之后相隔一定时间后再发送第二个临时参考信号。再有，图4C中，UE在进行时频同步完毕后就向网络设备发送CSI，而实际中，UE也可能在进行时频同步完毕后的一段时间后再向网络设备发送CSI，即，UE可能有一定的处理时间。
图3所示的实施例或图4A所示的实施例中，待激活的辅载波(例如第一辅载波)都属于FR1。下面请参考图5，介绍本申请实施例提供的再一种通信方法，在该方法中，待激活的第一辅载波属于第二频率范围，第二频率范围例如为FR2。
S501、网络设备向UE发送激活命令，UE接收来自网络设备的激活命令。该激活命令可以指示激活某个辅载波，例如指示激活第一辅载波，第一辅载波是终端设备的聚合载波 中的一个。在本申请实施例中，第一辅载波例如属于第二频率范围，第二频率范围例如为FR2。
关于S501的更多内容，可参考对于图3所示的实施例中的S301的介绍。
S502、在第二频率范围的第一频段上已有至少一个激活载波的情况下，或在该UE已识别第一辅载波(或者说，第一辅载波已知)的情况下，不调整第一辅载波的AGC。接着执行S505。
对于S502可以理解为，如果第二频率范围的第一频段上已有至少一个激活载波，则UE可以不调整第一辅载波的AGC；或者，如果该UE已识别第一辅载波，则无论第二频率范围的第一频段上是否有激活载波，UE都可以不调整第一辅载波的AGC。其中，第一频段是第一辅载波所在的频段。
如果第二频率范围的第一频段上已有至少一个激活载波，以第二频率范围是FR2为例，FR2上各个载波之间的频率差比较小，所以是可以利用激活载波的AGC作为第一辅载波的AGC，因此在这种情况下UE不必调整第一辅载波的AGC。另外在这种情况下，UE也可以认为第一辅载波是已知的，无需再对第一辅载波进行识别。
而如果第一辅载波已知，那么UE无需再调整第一辅载波的AGC，也不用再对第一辅载波进行识别。
S503、在第二频率范围的第一频段上没有激活载波，且该UE未识别第一辅载波(或者说，第一辅载波未知)情况下，接收来自第一辅载波的其他RS(或者说，在第一辅载波上接收来自网络设备的其他RS)。例如，网络设备在第一辅载波上发送其他RS，如果第二频率范围的第一频段上没有激活载波，且该UE未识别第一辅载波，则UE在第一辅载波上接收来自网络设备的其他RS。其他RS例如包括SSB和/或CSI-RS，图5中以SSB为例。
S504、UE根据该其他RS调整第一辅载波的AGC。图5中以UE根据SSB调整第一辅载波的AGC为例。接着执行S505。
UE在第一辅载波上接收来自网络设备的其他RS后，可以根据其他RS调整第一辅载波的AGC。
在FR2上，UE无论是进行AGC调整还是进行载波识别，都需要做接收波束扫描。如果UE在FR2上要根据临时RS调整AGC或对第一辅载波进行识别，那么网络设备会在多个下行发送波束上发送临时RS，UE用该UE的上行接收波束分别对准网络设备的下行发送波束进行接收，然后通过对各个上行接收波束所接收的临时RS进行测量，可以获得最优的上行接收波束，从而UE可以根据该最优上行接收波束接收来自第一辅载波的信号。如果临时RS通过TRS实现，那么TRS的带宽是比较大的，如果根据TRS来进行接收波束扫描，则网络设备会发出几十种TRS的图样，粗略估计需要TRS连续占据多个时隙。由于TRS的带宽较大，连续发送大带宽的RS对于网络设备来说开销较大，因此临时RS不适用于FR2未知辅小区(FR2unknown scell)场景中的AGC调整。因此，如果第二频率范围的第一频段上没有激活载波，且该UE未识别第一辅载波，则UE可以根据其他RS进行AGC调整，以减小网络设备的开销。
当然在这种情况下，UE还可以根据其他RS来对第一辅载波进行识别。例如UE在进行AGC调整后，可以完成对第一辅载波的识别。关于UE对第一辅载波进行识别的过程，可参考图1B所示的流程的介绍。
其中，S502和S503～S504是两种并列的方案，根据情况选择其中一种执行。
S505、网络设备在第一辅载波上发送临时RS，相应的，UE接收来自第一辅载波的临时RS(或者说，UE在第一辅载波上接收来自网络设备的临时RS)。
S506、UE根据该临时RS与第一辅载波进行时频同步。其中，UE与第一辅载波进行时频同步，也可以理解为，UE与第一辅载波进行时频跟踪或精定时，或者理解为，UE获得第一辅载波的精定时信息。
在图3所示的实施例已介绍了UE获得第一辅载波的粗定时信息的方式。如果执行了S502，则UE可以获得第一辅载波的粗定时信息。那么，例如网络设备在第一辅载波上发送临时RS，在获得第一辅载波的粗定时信息后，UE也可以正确接收来自第一辅载波的临时RS，从而UE可以利用该临时RS与第一辅载波进行时频同步。
如果执行了S503和S504，则由于UE已经完成了对第一辅载波的识别，因此UE可以获得第一辅载波的粗定时信息。那么，例如网络设备在第一辅载波上发送临时RS，在获得第一辅载波的粗定时信息后，UE也可以正确接收来自第一辅载波的临时RS，从而UE可以利用该临时RS与第一辅载波进行时频同步(或者说，获得第一辅载波的精定时信息)。
另外，第一辅载波的激活过程可能还需执行其他一些步骤，对此可参考图1B所示的流程的介绍。
可以看到在本申请实施例中，即使UE未调整AGC，或者UE根据其他RS调整了AGC，UE仍然可以根据临时RS来与第一辅载波进行时频同步，这样也能在一定程度上减小辅载波的激活时延。
而且，本申请实施例的各个实施例详细分析了不同场景下，用临时RS调整AGC和实现精定时的可行性，并且规范了UE的行为和网络设备的配置，达成了UE和网络设备的共同认知。
图6给出了本申请实施例提供的一种通信装置的结构示意图。所述通信装置600可以是图3所示的实施例、图4A所示的实施例或图5所示的实施例中的任一个实施例所述的终端设备或该终端设备的电路系统，用于实现上述方法实施例中对于终端设备的方法。所述通信装置也可以是图3所示的实施例、图4A所示的实施例或图5所示的实施例中的任一个实施例所述的网络设备或该网络设备的电路系统，用于实现上述方法实施例中对应于网络设备的方法。具体的功能可以参见上述方法实施例中的说明。其中，例如一种电路系统为芯片系统。
通信装置600包括一个或多个处理器601。处理器601也可以称为处理单元，可以实现一定的控制功能。所述处理器601可以是通用处理器或者专用处理器等。例如，包括：基带处理器，中央处理器等。所述基带处理器可以用于对通信协议以及通信数据进行处理。所述中央处理器可以用于对通信装置600进行控制，执行软件程序和/或处理数据。不同的处理器可以是独立的器件，也可以是设置在一个或多个处理电路中，例如，集成在一个或多个专用集成电路上。
可选的，通信装置600中包括一个或多个存储器602，用以存储指令604，所述指令604可在所述处理器上被运行，使得通信装置600执行上述方法实施例中描述的方法。可选的，所述存储器602中还可以存储有数据。所述处理器和存储器可以单独设置，也可以集成在一起。
可选的，通信装置600可以包括指令603(有时也可以称为代码或程序)，所述指令603可以在所述处理器上被运行，使得所述通信装置600执行上述实施例中描述的方法。 处理器601中可以存储数据。
可选的，通信装置600还可以包括收发器605以及天线606。收发器605可以称为收发单元、收发机、收发电路、收发器，输入输出接口等，用于通过天线606实现通信装置600的收发功能。
可选的，通信装置600还可以包括以下一个或多个部件：无线通信模块，音频模块，外部存储器接口，内部存储器，通用串行总线(universal serial bus，USB)接口，电源管理模块，天线，扬声器，麦克风，输入输出模块，传感器模块，马达，摄像头，或显示屏等等。可以理解，在一些实施例中，通信装置600可以包括更多或更少部件，或者某些部件集成，或者某些部件拆分。这些部件可以是硬件，软件，或者软件和硬件的组合实现。
本申请实施例中描述的处理器601和收发器605可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路(radio frequency identification，RFID)、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、或电子设备等上。实现本文描述的通信装置，可以是独立设备(例如，独立的集成电路，手机等)，或者可以是较大设备中的一部分(例如,可嵌入在其他设备内的模块)，具体可以参照前述关于终端设备，以及网络设备的说明，在此不再赘述。
本申请实施例提供了一种终端设备，该终端设备(为描述方便，称为UE)可用于前述各个实施例中。所述终端设备包括用以实现图3所示的实施例、图4A所示的实施例或图5所示的实施例中的任一个实施例所述的UE功能的相应的手段(means)、单元和/或电路。例如，终端设备，包括收发模块，用以支持终端设备实现收发功能，和，处理模块，用以支持终端设备对信号进行处理。
图7给出了本申请实施例提供的一种终端设备的结构示意图。
该终端设备700可适用于图1A、图2A～图2C中的任一个附图所示的架构中。为了便于说明，图7仅示出了终端设备700的主要部件。如图7所示，终端设备700包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备700进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏，显示屏，麦克风，键盘等主要用于接收用户输入的数据以及对用户输出数据。
本领域技术人员可以理解，为了便于说明，图7仅示出了一个存储器和处理器。在一些实施例中，终端设备700可以包括多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备700的收发单元710，将具有处理功能的处理器视为终端设备700的处理单元720。如图7所示，终端设备700包括收发单元710和处理单元720。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元710中用于实现接收功能的器件视为接收单元，将收发单元710中用于实现发送功能的器件视为发送单元，即收发单元710包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
本申请实施例还提供了一种网络设备，该网络设备可用于前述各个实施例中。所述网 络设备包括用以实现图3所示的实施例、图4A所示的实施例或图5所示的实施例中的任一个实施例所述的网络设备的功能的手段(means)、单元和/或电路。例如，网络设备包括收发模块，用以支持终端设备实现收发功能，和，处理模块，用以支持网络设备对信号进行处理。
图8给出了本申请实施例提供的一种网络设备的结构示意图。如图8所示，网络设备可适用于图1A、图2A～图2C中的任一个附图所示的架构中。该网络设备包括：基带装置801，射频装置802、天线803。在上行方向上，射频装置802通过天线803接收终端设备发送的信息，将终端设备发送的信息发送给基带装置801进行处理。在下行方向上，基带装置801对终端设备的信息进行处理，并发送给射频装置802，射频装置802对终端设备的信息进行处理后经过天线803发送给终端设备。
基带装置801包括一个或多个处理单元8011，存储单元8012和接口8013。其中处理单元8011用于支持网络设备执行上述方法实施例中网络设备的功能。存储单元8012用于存储软件程序和/或数据。接口8013用于与射频装置802交互信息，该接口包括接口电路，用于信息的输入和输出。在一种实现中，所述处理单元为集成电路，例如一个或多个ASIC，或，一个或多个数字信号处理器(digital signal processor，DSP)，或，一个或者多个现场可编程逻辑门阵列(field programmable gate array，FPGA)，或者这些类集成电路的组合。存储单元8012与处理单元8011可以位于同一个电路中，即片内存储元件。或者存储单元8012也可以与处理单元8011处于不同电路上，即片外存储元件。所述存储单元8012可以是一个存储器，也可以是多个存储器或存储元件的统称。
网络设备可以通过一个或多个处理单元调度程序的形式实现上述方法实施例中的部分或全部步骤。例如实现图3所示的实施例、图4A所示的实施例或图5所示的实施例中的任一个实施例网络设备的相应的功能。所述一个或多个处理单元可以支持同一种制式的无线接入技术，也可以支持不同种制式的无线接入制式。
在本申请所提供的几个实施例以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的计算机可读存储介质，可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括随机存取存储器(random access memory，RAM)、只读存储器(read-only memory，ROM)、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (56)

  1. 一种通信方法，其特征在于，包括：
    接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；
    在所述第一辅载波已知的情况下，根据所述终端设备对所述第一辅载波的测量周期MC，确定是否调整所述第一辅载波的自动增益控制AGC，其中，调整所述第一辅载波的AGC使用的是临时参考信号；
    接收来自所述第一辅载波的第一临时参考信号；
    根据所述第一临时参考信号与所述第一辅载波进行时频同步。
  2. 根据权利要求1所述的方法，其特征在于，根据所述终端设备对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备对所述第一辅载波的测量周期小于或等于第一测量周期的情况下，不调整所述第一辅载波的AGC。
  3. 根据权利要求2所述的方法，其特征在于，所述第一辅载波的激活时长是根据第一时长得到的，所述第一时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长。
  4. 根据权利要求3所述的方法，其特征在于，所述第一辅载波的激活时长满足如下关系：
    T activation_time＝T first_TempRS+5；
    其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第一时长。
  5. 根据权利要求1所述的方法，其特征在于，根据所述终端设备对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备对所述第一辅载波的测量周期大于第一测量周期的情况下，接收来自所述第一辅载波的第二临时参考信号；
    根据所述第二临时参考信号调整所述第一辅载波的AGC。
  6. 根据权利要求5所述的方法，其特征在于，在所述终端设备的载波聚合方式为带内载波聚合的情况下，所述第一辅载波的激活时长是根据第二时长得到的；
    其中，所述第二时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长，或所述第二时长为第三时长和第四时长中的最大值，所述第三时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长，所述第四时长为所述终端设备等待并获取来自第二载波的第一个完整的参考信号突发集的时长，所述第二载波包括所述终端设备的激活载波。
  7. 根据权利要求6所述的方法，其特征在于，在所述第二时长为所述终端设备等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长的情况下，所述第一辅载波的激活时长满足如下关系：
    T activation_time＝T first_TempRS+T TempRS+5；
    其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第二时长，T TempRS表示所述终端设备等待并获取来自所述第一辅载波的一个完整的临时参考信号突发集的时长。
  8. 根据权利要求6所述的方法，其特征在于，在所述第二时长为所述第三时长和所 述第四时长中的最大值的情况下，所述第一辅载波的激活时长满足如下关系：
    T activation_time＝max{T first_TempRS,T first_RS}+T TempRS+5；
    其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第三时长，T first_RS表示所述第四时长，max{x,y}表示取x和y中的最大值，T TempRS表示所述终端设备等待并获取来自所述第一辅载波的一个完整的临时参考信号突发集的时长。
  9. 根据权利要求6～8任一项所述的方法，其特征在于，来自所述第二载波的参考信号包括如下一种或多种：SSB，CSI-RS，或，临时参考信号。
  10. 根据权利要求5～9任一项所述的方法，其特征在于，所述方法还包括：
    向所述网络设备发送能力信息，所述能力信息用于指示AGC的调整与除所述第一辅载波外的其他载波相关，或，所述能力信息用于指示AGC的调整与除所述第一辅载波外的其他载波无关。
  11. 根据权利要求1～10任一项所述的方法，其特征在于，所述第一辅载波属于第一频率范围。
  12. 一种通信方法，其特征在于，包括：
    接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；
    在所述第一辅载波未知的情况下，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC；或，在所述第一辅载波未知的情况下，接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示不调整所述第一辅载波的AGC，或指示对所述第一辅载波的AGC的调整方式；
    接收来自所述第一辅载波的第一临时参考信号；
    根据所述第一临时参考信号与所述第一辅载波进行时频同步。
  13. 根据权利要求12所述的方法，其特征在于，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差小于或等于第一阈值，不调整所述第一辅载波的AGC。
  14. 根据权利要求12所述的方法，其特征在于，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述终端设备的参与聚合的载波为连续载波，接收来自所述第一辅载波的第二临时参考信号，并根据所述第二临时参考信号调整所述第一辅载波的AGC；或，
    在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述终端设备的参与聚合的载波为连续载波，接收来自所述第一辅载波的第二临时参考信号，并根据所述第二临时参考信号调整所述第一辅载波的AGC。
  15. 根据权利要求12所述的方法，其特征在于，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述终端设备的参与 聚合的载波为非连续载波，接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC；或，
    在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述终端设备的参与聚合的载波为非连续载波，接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC。
  16. 根据权利要求12所述的方法，其特征在于，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述第一辅载波的定时偏差与所述终端设备的激活载波的定时偏差大于CP时长，接收来自所述第一辅载波的SSB；
    根据所述SSB调整所述第一辅载波的AGC。
  17. 根据权利要求12所述的方法，其特征在于，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备的载波聚合方式为带间载波聚合的情况下，接收来自所述第一辅载波的SSB；
    根据所述SSB调整所述第一辅载波的AGC。
  18. 根据权利要求12所述的方法，其特征在于，根据所述终端设备的载波聚合方式，确定是否调整所述第一辅载波的AGC，包括：
    在所述终端设备的载波聚合方式为带间载波聚合的情况下，如果所述第一辅载波的发射功率与所述终端设备的激活载波的发射功率之差大于第一阈值，且所述第一辅载波的定时偏差与所述终端设备的激活载波的定时偏差大于CP时长，接收来自所述第一辅载波的SSB；
    根据所述SSB调整所述第一辅载波的AGC。
  19. 根据权利要求12～18任一项所述的方法，其特征在于，所述第一辅载波属于第一频率范围。
  20. 一种通信方法，其特征在于，包括：
    向终端设备发送激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是所述终端设备的辅载波中的一个；
    在所述第一辅载波上向所述终端设备发送SSB，所述SSB用于调整所述第一辅载波的AGC；
    在满足第一条件的情况下，向所述终端设备发送临时参考信号，所述临时参考信号用于所述终端设备与第一辅载波进行时频同步。
  21. 根据权利要求20所述的方法，其特征在于，所述第一条件包括：
    从所述激活命令发送完毕开始，到第三个SMTC周期结束；或，
    从所述激活命令发送完毕开始，到第一个SMTC周期结束；或，
    接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示已完成对所述第一辅载波的识别。
  22. 根据权利要求21所述的方法，其特征在于，所述第二指示信息为SSB的索引，或所述第二指示信息为SR。
  23. 根据权利要求20～22任一项所述的方法，其特征在于，所述第一辅载波属于第一频率范围。
  24. 一种通信方法，其特征在于，包括：
    接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是终端设备的辅载波中的一个；
    在第二频率范围的第一频段上已有至少一个激活载波的情况下，或在所述第一辅载波已知的情况下，不调整所述第一辅载波的AGC；或者，在第二频率范围的第一频段上没有激活载波，且所述第一辅载波未知的情况下，接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC；其中，所述第一频段是所述第一辅载波所在的频段；
    接收来自所述第一辅载波的临时参考信号；
    根据所述临时参考信号与所述第一辅载波进行时频同步。
  25. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是所述通信装置的辅载波中的一个；
    处理单元，用于在所述第一辅载波已知的情况下，根据所述通信装置对所述第一辅载波的测量周期MC，确定是否调整所述第一辅载波的自动增益控制AGC，其中，调整所述第一辅载波的AGC使用的是临时参考信号；
    所述收发单元，还用于接收来自所述第一辅载波的第一临时参考信号；
    所述处理单元，还用于根据所述第一临时参考信号与所述第一辅载波进行时频同步。
  26. 根据权利要求25所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC：
    在所述通信装置对所述第一辅载波的测量周期小于或等于第一测量周期的情况下，不调整所述第一辅载波的AGC。
  27. 根据权利要求26所述的通信装置，其特征在于，所述第一辅载波的激活时长是根据第一时长得到的，所述第一时长为所述通信装置等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长。
  28. 根据权利要求27所述的通信装置，其特征在于，所述第一辅载波的激活时长满足如下关系：
    T activation_time＝T first_TempRS+5；
    其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第一时长。
  29. 根据权利要求25所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置对所述第一辅载波的测量周期，确定是否调整所述第一辅载波的AGC：
    在所述通信装置对所述第一辅载波的测量周期大于第一测量周期的情况下，通过所述收发单元接收来自所述第一辅载波的第二临时参考信号；
    根据所述第二临时参考信号调整所述第一辅载波的AGC。
  30. 根据权利要求29所述的通信装置，其特征在于，在所述通信装置的载波聚合方式为带内载波聚合的情况下，所述第一辅载波的激活时长是根据第二时长得到的；
    其中，所述第二时长为所述通信装置等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长，或所述第二时长为第三时长和第四时长中的最大值，所述第三时长为所述通信装置等待并获取来自所述第一辅载波的第一个完整的临时参考信号突 发集的时长，所述第四时长为所述通信装置等待并获取来自第二载波的第一个完整的参考信号突发集的时长，所述第二载波包括所述通信装置的激活载波。
  31. 根据权利要求30所述的通信装置，其特征在于，在所述第二时长为所述通信装置等待并获取来自所述第一辅载波的第一个完整的临时参考信号突发集的时长的情况下，所述第一辅载波的激活时长满足如下关系：
    T activation_time＝T first_TempRS+T TempRS+5；
    其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第二时长，T TempRS表示所述通信装置等待并获取来自所述第一辅载波的一个完整的临时参考信号突发集的时长。
  32. 根据权利要求30所述的通信装置，其特征在于，在所述第二时长为所述第三时长和所述第四时长中的最大值的情况下，所述第一辅载波的激活时长满足如下关系：
    T activation_time＝max{T first_TempRS,T first_RS}+T TempRS+5；
    其中，T activation_time表示所述第一辅载波的激活时长，T first_TempRS表示所述第三时长，T first_RS表示所述第四时长，max{x,y}表示取x和y中的最大值，T TempRS表示所述通信装置等待并获取来自所述第一辅载波的一个完整的临时参考信号突发集的时长。
  33. 根据权利要求30～32任一项所述的通信装置，其特征在于，来自所述第二载波的参考信号包括如下一种或多种：SSB，CSI-RS，或，临时参考信号。
  34. 根据权利要求29～33任一项所述的通信装置，其特征在于，
    所述收发单元，还用于向所述网络设备发送能力信息，所述能力信息用于指示AGC的调整与除所述第一辅载波外的其他载波相关，或，所述能力信息用于指示AGC的调整与除所述第一辅载波外的其他载波无关。
  35. 根据权利要求25～34任一项所述的通信装置，其特征在于，所述第一辅载波属于第一频率范围。
  36. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是通信装置的辅载波中的一个；
    处理单元，用于在所述第一辅载波未知的情况下，根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC；或，所述处理单元，用于在所述第一辅载波未知的情况下，通过所述收发单元接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示不调整所述第一辅载波的AGC，或指示对所述第一辅载波的AGC的调整方式；
    所述收发单元，还用于接收来自所述第一辅载波的第一临时参考信号；
    所述处理单元，还用于根据所述第一临时参考信号与所述第一辅载波进行时频同步。
  37. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC：
    在所述通信装置的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述通信装置的激活载波的发射功率之差小于或等于第一阈值，不调整所述第一辅载波的AGC。
  38. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC：
    在所述通信装置的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发 射功率与所述通信装置的激活载波的发射功率之差大于第一阈值，且所述通信装置的参与聚合的载波为连续载波，通过所述收发单元接收来自所述第一辅载波的第二临时参考信号，并根据所述第二临时参考信号调整所述第一辅载波的AGC；或，
    在所述通信装置的载波聚合方式为带内载波聚合的情况下，如果所述想装置的参与聚合的载波为连续载波，通过所述收发单元接收来自所述第一辅载波的第二临时参考信号，并根据所述第二临时参考信号调整所述第一辅载波的AGC。
  39. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC：
    在所述通信装置的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述通信装置的激活载波的发射功率之差大于第一阈值，且所述通信装置的参与聚合的载波为非连续载波，通过所述收发单元接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC；或，
    在所述通信装置的载波聚合方式为带内载波聚合的情况下，如果所述通信装置的参与聚合的载波为非连续载波，通过所述收发单元接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC。
  40. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC：
    在所述通信装置的载波聚合方式为带内载波聚合的情况下，如果所述第一辅载波的发射功率与所述通信装置的激活载波的发射功率之差大于第一阈值，且所述第一辅载波的定时偏差与所述通信装置的激活载波的定时偏差大于CP时长，通过所述收发单元接收来自所述第一辅载波的SSB；
    根据所述SSB调整所述第一辅载波的AGC。
  41. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC：
    在所述通信装置的载波聚合方式为带间载波聚合的情况下，通过所述收发单元接收来自所述第一辅载波的SSB；
    根据所述SSB调整所述第一辅载波的AGC。
  42. 根据权利要求36所述的通信装置，其特征在于，所述处理单元用于通过如下方式根据所述通信装置的载波聚合方式，确定是否调整所述第一辅载波的AGC：
    在所述通信装置的载波聚合方式为带间载波聚合的情况下，如果所述第一辅载波的发射功率与所述通信装置的激活载波的发射功率之差大于第一阈值，且所述第一辅载波的定时偏差与所述通信装置的激活载波的定时偏差大于CP时长，通过所述收发单元接收来自所述第一辅载波的SSB；
    根据所述SSB调整所述第一辅载波的AGC。
  43. 根据权利要求36～42任一项所述的通信装置，其特征在于，所述第一辅载波属于第一频率范围。
  44. 一种通信装置，其特征在于，包括：
    收发单元，用于向终端设备发送激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是所述终端设备的辅载波中的一个；
    所述收发单元，还用于在所述第一辅载波上向所述终端设备发送SSB，所述SSB用于 调整所述第一辅载波的AGC；
    处理单元，用于确定满足第一条件；
    所述收发单元，还用于向所述终端设备发送临时参考信号，所述临时参考信号用于所述终端设备与第一辅载波进行时频同步。
  45. 根据权利要求44所述的通信装置，其特征在于，所述第一条件包括：
    从所述激活命令发送完毕开始，到第三个SMTC周期结束；或，
    从所述激活命令发送完毕开始，到第一个SMTC周期结束；或，
    接收来自所述终端设备的第二指示信息，所述第二指示信息用于指示已完成对所述第一辅载波的识别。
  46. 根据权利要求45所述的通信装置，其特征在于，所述第二指示信息为SSB的索引，或所述第二指示信息为SR。
  47. 根据权利要求44～46任一项所述的通信装置，其特征在于，所述第一辅载波属于第一频率范围。
  48. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自网络设备的激活命令，所述激活命令用于指示激活第一辅载波，所述第一辅载波是所述通信装置的辅载波中的一个；
    处理单元，用于在第二频率范围的第一频段上已有至少一个激活载波的情况下，或在所述第一辅载波已知的情况下，不调整所述第一辅载波的AGC；或者，在第二频率范围的第一频段上没有激活载波，且所述第一辅载波未知的情况下，通过所述收发单元接收来自所述第一辅载波的SSB，并根据所述SSB调整所述第一辅载波的AGC；其中，所述第一频段是所述第一辅载波所在的频段；
    所述收发单元，还用于接收来自所述第一辅载波的临时参考信号；
    所述处理单元，还用于根据所述临时参考信号与所述第一辅载波进行时频同步。
  49. 一种通信装置，其特征在于，包括：处理器和存储器；所述存储器用于存储一个或多个计算机程序，所述一个或多个计算机程序包括计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述一个或多个计算机程序，以使得所述通信装置执行如权利要求1～11中任一项所述的方法，或使得所述通信装置执行如权利要求12～19中任一项所述的方法，或使得所述通信装置执行如权利要求24所述的方法。
  50. 一种通信装置，其特征在于，包括：处理器和存储器；所述存储器用于存储一个或多个计算机程序，所述一个或多个计算机程序包括计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述一个或多个计算机程序，以使得所述通信装置执行如权利要求20～23中任一项所述的方法。
  51. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1～11中任一项所述的方法，或使得所述计算机执行如权利要求12～19中任一项所述的方法，或使得所述计算机执行如权利要求24所述的方法。
  52. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求20～23中任一项所述的方法。
  53. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序，当所 述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1～11中任一项所述的方法，或使得所述计算机执行如权利要求12～19中任一项所述的方法，或使得所述计算机执行如权利要求24所述的方法。
  54. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求20～23中任一项所述的方法。
  55. 一种电路系统，其特征在于，所述电路系统包括：
    处理器和接口，所述处理器用于从所述接口调用并运行指令，当所述处理器执行所述指令时，实现如权利要求1～11中任一项所述的方法，或实现如权利要求12～19中任一项所述的方法，或实现如权利要求24所述的方法。
  56. 一种电路系统，其特征在于，所述电路系统包括：
    处理器和接口，所述处理器用于从所述接口调用并运行指令，当所述处理器执行所述指令时，实现如权利要求20～23中任一项所述的方法。
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