Method, apparatus, device and storage medium for activating a secondary cell

Abstract

The present application discloses a method, apparatus, device, and storage medium for activating a secondary cell, which relate to the mobile communications field. The method includes receiving a reference signal active signal used to activate a reference signal, and receiving the reference signal and activating the secondary cell based on the reference signal active signal, where the reference signal is used to activate the secondary cell. The method does not activate the secondary cell after receiving the first SSB, thereby reducing the waiting period for receiving the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

Description

[Technical field]

[0001] The present application relates to the field of mobile communications, and in particular to a method, an apparatus, a device and a storage medium for activating a secondary cell. [Background technology]

[0002] In the NR (New Radio) system, a carrier aggregation scheme can be used to support a larger bandwidth, and a terminal can receive and transmit data from multiple cells of the carrier aggregation. The aggregated multiple cells include one primary cell and multiple secondary cells, and the initial state of the secondary cell is inactive, so the terminal needs to activate the secondary cell to receive or transmit data.

[0003] Currently, the terminal receives a MAC (Media Access Control) CE (Control Element) for activating a secondary cell sent by a network device, returns a confirmation message indicating that the MAC CE has been received, receives the first SSB (Synchronization Signal Block) after a preset period has elapsed since returning the confirmation message, analyzes this SSB, decides to use the secondary cell, and activates the secondary cell. However, because the terminal waits a long delay to receive the SSB, it takes a long time to activate the secondary cell. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a method, apparatus, device and storage medium for activating a secondary cell, which can reduce the waiting period for receiving the first SSB, reduce the time delay of activating a secondary cell, and improve the accuracy of activating a secondary cell. The technical solutions are as follows: [Means for solving the problem]

[0005] According to one aspect of the present application, there is provided a method for activating a secondary cell applied to a terminal, the method comprising: receiving a reference signal active signal used to activate a reference signal; receiving the reference signal based on the reference signal active signaling and activating the secondary cell; The reference signal is used to activate the secondary cell.

[0006] According to one aspect of the present application, there is provided a method for activating a secondary cell applied to a network device, the method comprising: transmitting a reference signal active signaling to activate the reference signal; transmitting the reference signal based on the reference signal active signaling; The reference signal is used to activate a secondary cell.

[0007] According to one aspect of the present application, there is provided an apparatus for activating a secondary cell provided in a terminal, the apparatus comprising: A receiver module and an active module are provided. The receiving module is configured to receive a reference signal active signal used to activate a reference signal, the reference signal being used to activate a secondary cell; The receiving module receives the reference signal based on the reference signal active signaling; The activation module is configured to activate the secondary cell.

[0008] According to one aspect of the present application, there is provided an apparatus for activating a secondary cell provided in a network device, the apparatus comprising: a transmitting module configured to transmit a reference signal active signaling for activating a reference signal, the reference signal being used to activate a secondary cell; The transmitting module transmits the reference signal based on the reference signal active signaling.

[0009] According to one aspect of the present application, there is provided a terminal, the terminal including a processor, a transceiver connected to the processor, and a memory for storing executable program code of the processor, the processor configured to load and execute the executable program code such that the terminal can realize the method for activating a secondary cell as described above.

[0010] According to one aspect of the present application, there is provided a network device including a processor, a transceiver connected to the processor, and a memory for storing executable program code of the processor, the processor being configured to load and execute the executable program code such that the network device realizes the method for activating a secondary cell as described above.

[0011] According to one aspect of the present application, a computer-readable storage medium is provided, the readable storage medium having executable program code stored therein, the executable program code being loaded and executed by a processor to implement the method of activating a secondary cell as described above.

[0012] The technical solutions provided by the embodiments of the present application include at least the following beneficial effects:

[0013] The method, apparatus, device and storage medium provided in the embodiments of the present invention allow a terminal to receive a reference signal and activate a secondary cell based on reference signal active signaling without activating the secondary cell after receiving the first SSB, thereby reducing the waiting period for receiving the first SSB, reducing the time delay of activating the secondary cell, and improving the accuracy of activating the secondary cell. [Brief description of the drawings]

[0014] In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the drawings described in the following embodiments are briefly described. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. [Figure 1] FIG. 1 shows a schematic diagram of carrier aggregation provided by an exemplary embodiment of the present application. [Diagram 2] FIG. 2 illustrates a block diagram of a communication system provided by an exemplary embodiment of the present application. [Diagram 3] FIG. 3 shows a flowchart of a method for activating a secondary cell provided by an exemplary embodiment of the present application. [Figure 4] FIG. 4 shows a block diagram of an apparatus for activating a secondary cell provided by an exemplary embodiment of the present application. [Diagram 5] FIG. 5 illustrates a block diagram of an apparatus for activating a secondary cell provided by an exemplary embodiment of the present application. [Figure 6] FIG. 6 illustrates a block diagram of an apparatus for activating a secondary cell provided by an exemplary embodiment of the present application. [Figure 7] FIG. 7 illustrates a block diagram of an apparatus for activating a secondary cell provided by an exemplary embodiment of the present application. [Figure 8] FIG. 8 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] In order to make the objectives, technical solutions and advantages of the present application clearer, the following describes the embodiments of the present application in more detail with reference to the accompanying drawings.

[0016] As used in this application, the terms "first", "second", etc. can be used to describe various concepts, but it should be understood that these concepts are not limited to these terms unless otherwise specified. These terms are used only to distinguish one concept from another.

[0017] First, the terms used in the embodiments of the present application will be briefly explained.

[0018] 1. Carrier Aggregation To support larger bandwidths, NR systems use joint scheduling and resources on multiple component carriers. Depending on whether the aggregated carriers are contiguous in the spectrum, carrier aggregation can be divided into contiguous carrier aggregation and non-contiguous carrier aggregation. Depending on whether the aggregated carriers are in the same frequency band, carrier aggregation can be divided into intra-band carrier aggregation and inter-band carrier aggregation.

[0019] A carrier aggregation carrier includes a Primary Cell Component (PCC) and a Secondary Cell Component (SCC). There is only one PCC, and the PCC is the carrier corresponding to the primary cell. The PCC provides RRC signaling connection, NAS (Non-Access Stratrum) functions, security services, etc. The SCC provides additional radio resources. Both the PCC and the SCC are serving cells. In the NR system, the maximum number of carriers in a carrier aggregation carrier is 5, the maximum bandwidth after aggregation is 100 MHz (megahertz), and all the aggregated carriers belong to the same base station.

[0020] For example, as shown in Figure 1, one carrier aggregation includes five carriers, each of which has a bandwidth of 20 MHz, and the maximum bandwidth after aggregation is 100 MHz.

[0021] In a particular example, carriers aggregated by carrier aggregation use the same Cell Radio Network Temporary Identifier (C-RNTI), and the base station can ensure that the C-RNTIs do not conflict within the cell that each carrier resides in. Because carrier aggregation includes asymmetric carrier aggregation and symmetric carrier aggregation, the aggregated carriers must include a downlink but may not include an uplink.

[0022] 2. Activating the Secondary Cell A secondary cell is configured by RRC (Radio Resource Control) signaling, and the initial state of the secondary cell is inactive, in which the secondary cell cannot receive or transmit data, and the secondary cell needs to be activated, and an activated secondary cell can transmit and receive data.

[0023] 3. Reference signal: This reference signal is TRS or CSIRS. Hereinafter, the reference signal will be described by taking TRS as an example.

[0024] This TRS occupies symbols at predefined positions in each slot, for example, this TRS occupies the 5th and 9th symbols in a slot.

[0025] 2 shows a block diagram of a communication system provided by an exemplary embodiment of the present application. The communication system may include an access network 12 and a terminal 13.

[0026] The access network 12 includes a plurality of network devices 120. The network devices 120 may be devices that provide wireless communication capabilities to terminals. The network devices 120 may be various forms of base stations (e.g., macro base stations, micro base stations, relay stations) or access points, etc. In systems using different wireless access technologies, the names of devices with base station capabilities may be different. For example, in LTE systems, they are called eNodeB or eNB, and in 5G NR-U systems, they are called gNodeB or gNB. With the development of communication technologies, the term "base station" may change. For ease of description in the embodiments of the present application, the above-mentioned devices for providing wireless communication capabilities to terminals 13 are collectively referred to as access network devices.

[0027] The terminal 13 may include various wireless communication capable handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user devices, mobile stations (MS), terminals (terminal devices), etc. For convenience of explanation, the above devices are collectively referred to as terminals. The access network device 120 and the terminal 13 communicate with each other via a specific air interface technology, such as the Uu interface.

[0028] The technical solutions of the embodiments of the present application include a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an Advanced Long Term Evolution (LTE-A) system, a New Radio (NR) system, an evolution system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-U system, a Universal Mobile Telecommunication System (UMTS), a Worldwide Interoperability for Microwave Access (WIM) system, a LTE-based access to unlicensed spectrum (LTE-U) system, a NR-U system, a Universal Mobile Telecommunication System (UMTS), a LTE-based access to unlicensed spectrum (LTE-U) system, a NR-U ... The present invention can be applied to a wide variety of communication systems, including wireless local area networks (WLANs), wireless fidelity (WiFi), next-generation communication systems, and other communication systems.

[0029] Generally, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems support not only traditional communication, but also Device to Device (D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, Vehicle to everything (V2X) system, etc. The embodiments of the present application can also be applied to these communication systems.

[0030] FIG. 3 shows a flowchart of a method for activating a secondary cell provided by an exemplary embodiment of the present application, which is applied to the terminal and network device shown in FIG. 2, and the method includes at least part of the following contents:

[0031] At 310, the network device transmits reference signal active signaling.

[0032] At 320, the terminal receives reference signal active signaling.

[0033] The reference signal active signaling is used to activate a reference signal. In addition, the reference signal active signaling may be other types of signaling, which also have the function of activating a reference signal, and is not limited in the embodiments of the present application. The reference signal is used to activate a secondary cell.

[0034] The embodiment of the present application is used in a carrier aggregation scenario, and when multiple carriers are aggregated by carrier aggregation technology, a primary cell corresponds to one of the aggregated multiple carriers, and a secondary cell corresponds to another one of the aggregated multiple carriers. When it is necessary to transmit data using a carrier corresponding to a secondary cell, a network device can send a reference signal active signaling to a terminal, and activate a reference signal through the reference signal active signaling. The network device sends a reference signal, and then the terminal activates a secondary cell according to the reference signal sent by the network device, and transmits data using a carrier corresponding to the secondary cell.

[0035] In some embodiments, the reference signal active signaling is either a Media Access Control (MAC) Control Element (CE) or Downlink Control Information (DCI).

[0036] If the reference signal active signaling is a MAC CE, the network device sends a MAC CE, and the terminal receives the MAC CE, then determines a secondary cell to be activated, and activates the secondary cell based on the received reference signal.

[0037] If the reference signal active signaling is a DCI, the network device transmits a DCI, and the terminal receives the DCI, then determines a secondary cell to be activated, and activates the secondary cell based on the received reference signal.

[0038] The reference signal in the embodiment of the present application is a Tracking Reference Signal (TRS).

[0039] At 330, the network device transmits a reference signal based on the reference signal active signaling.

[0040] At 340, the terminal receives the reference signal based on the reference signal active signaling and activates the secondary cell.

[0041] In an embodiment of the present application, after receiving the reference signal active signaling, the terminal determines a time domain position of a reference signal based on the reference signal active signaling, and then receives a reference signal based on the time domain position of the reference signal, and activates a secondary cell.

[0042] First, the start time domain position of the reference signal will be described.

[0043] In some embodiments, the terminal determines a starting time domain location of the reference signal based on a time domain location at which it transmits a reference signal active signal, and starts receiving the reference signal at the starting time domain location of the reference signal.

[0044] When the reference signal active signaling includes two cases of MAC CE or DCI, the determination of the start time domain position of the reference signal also includes the following two cases:

[0045] (1) If the reference signal active signaling is a MAC CE, then the start time domain position of the reference signal is a time domain position corresponding to a first preset period after the time when the MAC CE is transmitted.

[0046] After a network device sends a MAC CE to a terminal, the terminal receives the MAC CE and determines a time domain position at which the MAC CE is sent, and determines a start time domain position of a reference signal based on the time domain position of the MAC CE. In this case, the network device transmits a reference signal at the start time domain position of the reference signal, and the terminal receives the reference signal at the start time domain position.

[0047] After receiving the MAC CE, the terminal needs to process the MAC CE to obtain information contained in the MAC CE, and the terminal's processing of the MAC CE requires a first preset period, so the terminal receives the reference signal at a time domain position corresponding to the first preset period after the time when the MAC CE is transmitted.

[0048] The first preset period may be set by a network device, by an operator, or by other methods, for example, the first preset period may be 40 milliseconds, 50 milliseconds, or other value.

[0049] In a possible implementation, the first preset period is expressed in time units. For example, the first preset period is T time units, where T is an integer. The time unit is a symbol, or the time unit is a slot.

[0050] Alternatively, the start time domain position of the reference signal is a time domain position corresponding to a second preset period after the time when the MAC CE confirmation message is transmitted.

[0051] The acknowledgement message is a HARQ-ACK message. The terminal receives a MAC CE, analyzes the MAC CE, and determines a time domain position corresponding to a second preset period after the terminal sends the acknowledgement message of the MAC CE as a start time domain position of a reference signal, because the terminal needs to further return the acknowledgement message of the MAC CE to a network device.

[0052] The second preset period may be set by a network device, by an operator, or by other methods, for example, the second preset period may be 20 milliseconds, 30 milliseconds, or other value.

[0053] (2) When the reference signal active signaling is DCI, the start time domain position of the reference signal is a time domain position corresponding to a third preset period after the time of transmitting the DCI.

[0054] After a network device transmits DCI to a terminal, if the terminal determines a start time domain position of a reference signal based on the time domain position of the DCI, the network device starts transmitting a reference signal at the start time domain position, and the terminal starts receiving the reference signal at the start time domain position.

[0055] After receiving the DCI, the terminal needs to process the DCI to obtain information included in the DCI, and a certain period is required for the terminal to process the DCI. Therefore, the terminal can receive a reference signal at a time domain position corresponding to a third preset period after the time when the DCI is transmitted.

[0056] Here, the third preset period is determined by the following formula:

[0057]

number

[0058] TIFF0007612012000002.tif59170

[0059] In a possible implementation, the third preset period is expressed in time units, for example, the third preset period is N time units, where N is an integer.

[0060] Furthermore, when the frequency range to which the secondary cell belongs is FR2 (which indicates a certain frequency range, for example, 24250 MHz-52600 MHz), the interval between the time domain position of the DCI and the start time domain position of the reference signal is equal to or greater than the third preset period.

[0061] In the embodiment of the present application, the DCI is used as a reference signal active signaling, and the start time domain position of the reference signal can be determined based on the time domain position of transmitting the DCI. Since the terminal can complete the processing of the DCI, there is no need to increase the processing speed of the terminal, thereby reducing the complexity of the terminal and increasing the processing speed for the reference signal.

[0062] In some other embodiments, in determining the start time domain position of the reference signal based on the reference signal active signaling, it is necessary to ensure that the start time domain position of the reference signal overlaps with the time domain position of the SSB of the active carrier.

[0063] In the embodiment of the present application, when multiple carriers are aggregated by carrier aggregation technology, a network device can activate different carriers and transmit or receive different information on different carriers. If the starting frequency domain position of a reference signal overlaps with the time domain position of a synchronization signal block (SSB) of an active carrier, the terminal can detect the reference signal and the SSB at the overlapping time domain position and can consider multiple carriers simultaneously, thereby improving the efficiency of the terminal receiving information.

[0064] For example, the starting time domain location of a reference signal is in the same slot as an SSB, and the symbols in which the reference signal resides are a subset or the full set of symbols in which the SSB resides.

[0065] In some other embodiments, the starting time domain location of the reference signal is determined based on the state of the carrier corresponding to the secondary cell.

[0066] In the embodiment of the present application, since the state of the carrier corresponding to the secondary cell includes multiple states, the methods of determining the starting time domain position of the reference signal in different states are different.

[0067] The state of the carrier corresponding to the secondary cell is determined based on at least one of a measurement period of the secondary cell, a frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0068] The terminal determines the state of the carrier corresponding to the secondary cell. For example, if the secondary cell is unknown, the terminal determines that the state of the carrier corresponding to the secondary cell is state 1, and if the frequency range to which the secondary cell belongs is FR1 (referring to a certain frequency range, for example 450 MHz-6000 MHz), the terminal determines that the state of the carrier corresponding to the secondary cell is state 2, or may determine other states.

[0069] Illustratively, the embodiment of the present application includes nine types of carrier states, which are shown in Table 1.

[0070] JPEG0007612012000003.jpg239170 JPEG0007612012000004.jpg95170

[0071] Based on the nine states in Table 1, if it is determined that the secondary cell state is either state 2, state 3, state 6, state 7, state 8, or state 9, it is necessary to ensure that the determined reference signal start time domain position is not only related to the reference signal active signaling time domain position, but also overlaps with the SSB time domain position.

[0072] If the state of the secondary cell is determined to be state 1 or state 4, the determined start time domain location of the reference signal is related to the time domain location of the reference signal active signaling.

[0073] If the state of the secondary cell is determined to be state 5, there is no need to determine the starting time domain position of the reference signal.

[0074] It should be noted that the first point is that the terminal and the network device in the embodiment of the present application both determine the start time domain position of the reference signal in the above manner.

[0075] In addition, the second point is that the embodiment of the present application only takes as an example the terminal determines the start time domain position of the reference signal based on the time domain position of the reference signal active signal. In another embodiment, the start time domain position of the reference signal may be indicated by a network device without the terminal needing to determine it based on the time domain position of the reference signal active signal.

[0076] In the above embodiment, a method for determining the start time domain position of a reference signal has been described. Next, a method for determining the time domain length of a reference signal will be described.

[0077] In the embodiment of the present application, the time domain length of the reference signal can be determined in the following three ways. (1) The time domain length of the reference signal is determined based on the state of the carrier. (2) The time domain length of the reference signal is indicated by reference signal configuration signaling transmitted by the network device. (3) The time domain length of the reference signal is a preset length.

[0078] The time-domain length of the reference signal is used to represent the number of time-domain locations corresponding to the reference signal, for example, the reference signal occupies four time-domain locations, the reference signal occupies six time-domain locations, or the reference signal occupies another number of time-domain locations.

[0079] The time domain length of the reference signal is represented by the number of time domain units, or the frequency domain length of the reference signal is represented by the number of repeated transmissions of the reference signal.

[0080] For example, when the time domain length of the reference signal is represented by symbols, the number of time domain positions occupied by the reference signal is the same as the number of symbols. When the time domain length of the reference signal is represented by slots, the number of time domain positions occupied by the reference signal is twice the number of slots. When the time domain length of the reference signal is represented by the number of repeated transmissions of the reference signal, the number of time domain positions occupied by the reference signal is four times the number of repeated transmissions.

[0081] In addition, the embodiments of the present application only describe examples of expressing the time domain length of a reference signal by the number of repeated transmissions or the number of time domain units, but the present application is not limited to the above methods, and other methods can also be used to express the time domain length of a reference signal.

[0082] When the time domain length of the reference signal is determined by the method (1), for the time-frequency synchronization function, multiple time domain positions of the reference signal are required, and time-frequency synchronization is realized based on the difference between the multiple time domain positions. Alternatively, for the frequency gain control function, if the reference signal is one symbol, the frequency gain control can be completed, and even if the reference signal is multiple symbols, the frequency gain control can be completed in the same manner. In this way, the time domain length of the reference signal can be determined based on the carrier states of different secondary cells.

[0083] Next, based on the nine types of states shown in Table 1, the time domain length of the reference signal shown in Table 2 can be determined.

[0084] JPEG0007612012000005.jpg248170 JPEG0007612012000006.jpg251170 JPEG0007612012000007.jpg31170

[0085] When determining the time domain length of a reference signal using method (2), the terminal does not need to determine the frequency domain length of the reference signal based on the carrier state of the secondary cell, and the network device can send reference signal configuration signaling to the terminal, and the terminal receives the reference signal configuration signaling and determines the time domain length of the reference signal based on the reference signal configuration signaling.

[0086] When the time domain length of the reference signal is determined by the method (3), the frequency domain length of the reference signal determined by the terminal is a preset length.

[0087] The preset length may be set by a network device, by an operator, or by other methods. The preset length is an example, and may be other values ​​in practical applications.

[0088] In an embodiment of the present application, the time domain length of a reference signal is determined to a predetermined length regardless of the carrier state of a secondary cell, thereby reducing the operation of determining the time domain length of the reference signal by the terminal and improving the efficiency of determining the frequency domain length of the reference signal.

[0089] Next, a method for determining the time domain location of the reference signal will be described.

[0090] The time domain location of the reference signal is determined based on a state of a carrier corresponding to a secondary cell, the state of the carrier corresponding to the secondary cell being determined based on at least one of a measurement period of the secondary cell, a frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0091] When the carrier state corresponding to the secondary cell completes time domain synchronization based on the reference signal, it is determined that there is an interval between the time domain positions of the reference signals, or the reference signal includes a reference signal for frequency gain control setting and a reference signal for time-frequency synchronization, and when the carrier state completes time domain synchronization and frequency gain control setting based on the reference signal, the reference signal for frequency gain control setting is adjacent to the reference signal for time-frequency synchronization.

[0092] In addition, the terminal's dependency on the reference signal varies depending on the carrier state, and the number of time domain positions of the reference signal and the spacing between the time domain positions vary depending on the carrier state.

[0093] For example, in state 1, the terminal completes time-frequency synchronization based on the reference signal, and there are intervals between the time-domain positions of the reference signal.

[0094] In state 2, the terminal completes time-domain synchronization and frequency gain control based on the reference signal. To reduce delay and avoid repeated frequency gain control settings, the reference signal for frequency gain control is adjacent to the reference signal for time-frequency synchronization, and there is an interval between the time-domain positions of the reference signal for time-frequency synchronization.

[0095] In state 3, the terminal completes time domain synchronization and frequency gain control based on the reference signal, and multiple reference signals are required because the frequency gain control needs to be set multiple times. The multiple reference signals for frequency gain control are adjacent, and there is an interval between the multiple reference signals for time-frequency synchronization.

[0096] In state 4, the terminal completes time-frequency synchronization based on the reference signal, and there is an interval between the time-domain positions of the reference signal.

[0097] In state 5, the terminal does not need to receive a reference signal.

[0098] In state 6, the terminal completes time-domain synchronization and frequency gain control based on the reference signal. To reduce delay and avoid repeated frequency gain control settings, the reference signal for frequency gain control is adjacent to the reference signal for time-frequency synchronization, and there is an interval between the time-domain positions of the reference signal for time-frequency synchronization.

[0099] In state 7, the terminal completes time-domain synchronization and frequency gain control based on the reference signal. To reduce delay and avoid repeated frequency gain control settings, the reference signal for frequency gain control is adjacent to the reference signal for time-frequency synchronization, and there is an interval between the time-domain positions of the reference signal for time-frequency synchronization.

[0100] In state 8, for the same beam (there is a QCL Type D relationship between the signals), it is the same as state 3. Multiple beams are repeatedly mapped to different symbols. There is a certain interval between different beams to meet the beam switching time.

[0101] In state 9, for the same beam (there is a QCL Type D relationship between the signals), it is the same as state 3. Multiple beams are repeatedly mapped to different symbols. There is a certain interval between different beams to meet the beam switching time.

[0102] For example, taking the reference signal as TRS in the states of Table 1, Table 3 shows the time domain positions of the reference signal corresponding to each state, where the value of x is 5.

[0103] [Table 3]

[0104] In another embodiment, the time domain location of the reference signal is the slot that the reference signal occupies and / or a pre-defined location within the slot.

[0105] In the embodiment of the present application, if the carriers corresponding to the secondary cells all satisfy the above conditions, the format of the existing time domain position of the reference signal is used to determine each time domain position of the reference signal. For example, as shown in Table 4, the time domain positions of the reference signal occupy the 5th symbol and the 9th symbol in the slot, and the value of x is 5.

[0106] [Table 4]

[0107] If the initial time domain position of the reference signal does not overlap with the time domain position of the SSB of the active carrier, shift the initial time domain position of the reference signal so that the shifted time domain position of the reference signal overlaps with the frequency domain position of the SSB.

[0108] In some other embodiments, if a reference signal has a quasi-collocated relationship with an SSB or CSI RS, measurements related to the SSB or CSI may be performed based on the reference signal.

[0109] There are four types of pseudo-collocational relations: pseudo-collocational relations of type A, pseudo-collocational relations of type B, pseudo-collocational relations of type C, and pseudo-collocational relations of type D.

[0110] The pseudo-collocation relationship of Type A has characteristics of Doppler frequency shift, Doppler spread, mean delay and delay spread, the pseudo-collocation relationship of Type B has characteristics of Doppler frequency shift and Doppler spread, the pseudo-collocation relationship of Type C has characteristics of Doppler frequency shift and mean delay, and the pseudo-collocation relationship of Type D has characteristics of spatial reception parameters.

[0111] (1) When the reference signal and the SSB have a quasi-collocation relationship, the SSB is detected based on the reference signal.

[0112] The reference signal and the SSB have a quasi-collocation relationship of type C, or a quasi-collocation relationship of type C and type D.

[0113] (2) When a reference signal and a channel state indication reference signal (CSI RS) for CSI measurement have a quasi-collocation relationship, CSI measurement is performed based on the reference signal.

[0114] The reference signal and the CSI RS have a quasi-collocation relationship of type A, or a quasi-collocation relationship of type B, or a quasi-collocation relationship of type A and type D.

[0115] It should be noted that the embodiments of the present application are described with reference to a case where the reference signal has a quasi-collocated relationship with the SSB or CSI measurement. In another embodiment, the reference signal does not have a quasi-collocated relationship with the SSB or CSI, and the reference signal received by the terminal is only used for frequency gain control or time-frequency synchronization.

[0116] According to the method provided by the embodiment of the present application, the terminal can receive a reference signal and activate a secondary cell based on the reference signal active signaling without activating the secondary cell after receiving the first SSB, thereby reducing the waiting period for receiving the first SSB, reducing the time delay of activating the secondary cell, and improving the accuracy of activating the secondary cell.

[0117] Furthermore, the terminal activates the secondary cell based on the received reference signal without the need to analyze the SSB, which reduces the processing resources consumed during analysis and saves resources of the terminal.

[0118] Furthermore, the starting resource position of the reference signal, the time domain length of the reference signal, and the time domain position of the reference signal are respectively defined, ensuring that the reference signal can activate the secondary cell in any scene, and improving the efficiency of activating the sub-cell.

[0119] Furthermore, the time domain length of the reference signal can be determined in various ways, which provides greater flexibility in determining the reference signal and further increases the flexibility in activating secondary cells.

[0120] FIG. 4 shows a block diagram of an apparatus for activating a secondary cell provided by an exemplary embodiment of the present application, where the apparatus is applied in a terminal, and the apparatus includes: a receiving module 401 and an active module 402 .

[0121] The receiving module 401 is configured to receive a reference signal active signaling, where the reference signal active signal is used to activate a reference signal, and the reference signal is used to activate a secondary cell.

[0122] The receiving module 401 is configured to receive a reference signal based on reference signal active signaling.

[0123] The active module 402 is configured to activate the secondary cell.

[0124] According to the device provided by the embodiment of the present application, the terminal can receive a reference signal and activate a secondary cell based on the reference signal active signaling without activating the secondary cell after receiving the first SSB, thereby reducing the waiting period for receiving the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

[0125] In some embodiments, the reference signal active signaling is either a MAC CE or a DCI.

[0126] In some embodiments, the reference signal active signaling is a MAC CE, and the starting time domain location of the reference signal is a time domain location corresponding to a first preset period after the time the MAC CE is transmitted, or the starting time domain location of the reference signal is a time domain location corresponding to a second preset period after the time the MAC CE confirmation message is transmitted.

[0127] In some embodiments, the reference signal active signaling is a DCI and the starting time domain location of the reference signal is a time domain location corresponding to a third preset period of time after the time the DCI is transmitted.

[0128] In some embodiments, the third preset period is determined by the following formula:

[0129]

number

[0130] TIFF0007612012000011.tif16170

[0131] In some embodiments, the starting time domain location of the reference signal overlaps with the time domain location of the SSB of the active carrier.

[0132] In some embodiments, the starting time domain location of the reference signal is determined based on the condition of the carrier corresponding to the secondary cell.

[0133] In some embodiments, the time domain length of the reference signal is determined based on a state of a carrier corresponding to a secondary cell, or the time domain length of the reference signal is indicated by reference signal configuration signaling transmitted by the network device, or the time domain length of the reference signal is a preset length.

[0134] In some embodiments, the time domain length of the reference signal is expressed by the number of time domain units, or the time domain length of the reference signal is expressed by the number of repeated transmissions of the reference signal.

[0135] In some embodiments, the time domain unit is a symbol or the time domain unit is a slot.

[0136] In some embodiments, the time domain location of the reference signal is determined based on the condition of the carrier corresponding to the secondary cell.

[0137] In some embodiments, the time domain location of the reference signal is the slot that the reference signal occupies and / or a pre-defined location within the slot.

[0138] In some embodiments, referring to FIG. 5, the apparatus further comprises a shift module 403.

[0139] The shift module 403 is configured to shift an initial time-domain position of the reference signal when the initial time-domain position of the reference signal does not overlap with the time-domain position of the SSB of the active carrier, so that the time-domain position of the shifted reference signal overlaps with the time-domain position of the SSB of the active carrier.

[0140] In some embodiments, the status of the carrier corresponding to the secondary cell is determined based on at least one of a measurement periodicity of the secondary cell, a frequency range in which the secondary cell resides, or whether the secondary cell is known.

[0141] In some embodiments, the reference signal is a tracking reference signal (TRS).

[0142] As for the apparatus in the above embodiment, the specific aspects of the operations performed by each module have already been described in detail in the method embodiment, so they will not be described in detail here.

[0143] The active module 402 or the shift module 403 may be a processing module, and may be a processor in a specific implementation. The receiving module 401 may be a receiver or a transceiver in a specific implementation.

[0144] 6 shows a block diagram of an apparatus for activating a secondary cell provided by an exemplary embodiment of the present application. The apparatus is applied in a network device, and the apparatus includes: a transmitting module 601;

[0145] The transmitting module 601 is configured to transmit a reference signal active signaling, where the reference signal active signal is used to activate a reference signal, and the reference signal is used to activate a secondary cell.

[0146] The transmitting module 601 is configured to transmit a reference signal based on a reference signal active signaling.

[0147] According to the device provided by the embodiment of the present application, the terminal can receive a reference signal and activate a secondary cell based on the reference signal active signaling without activating the secondary cell after receiving the first SSB, thereby reducing the waiting period for receiving the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

[0148] In some embodiments, the reference signal active signaling is either a MAC CE or a DCI.

[0149] In some embodiments, the reference signal active signaling is a MAC CE, and the starting time domain location of the reference signal is a time domain location corresponding to a first preset period after the time the MAC CE is transmitted, or the starting time domain location of the reference signal is a time domain location corresponding to a second preset period after the time the MAC CE confirmation message is transmitted.

[0150] In some embodiments, the reference signal active signaling is a DCI and the start time domain location is a time domain location corresponding to a third preset period of time after the time the DCI is transmitted.

[0151] In some embodiments, the third preset period is determined by the following formula:

[0152]

number

[0153] TIFF0007612012000013.tif17170

[0154] In some embodiments, the starting time domain location of the reference signal overlaps with the time domain location of the SSB of the active carrier.

[0155] In some embodiments, the starting time domain location of the reference signal is determined based on the condition of the carrier corresponding to the secondary cell.

[0156] In some embodiments, the time domain length of the reference signal is determined based on a state of a carrier corresponding to a secondary cell, or the time domain length of the reference signal is indicated by reference signal configuration signaling transmitted by the network device, or the time domain length of the reference signal is a preset length.

[0157] In some embodiments, the time domain length of the reference signal is expressed by the number of time domain units, or the time domain length of the reference signal is expressed by the number of repeated transmissions of the reference signal.

[0158] In some embodiments, the time domain unit is a symbol or the time domain unit is a slot.

[0159] In some embodiments, the time domain location of the reference signal is determined based on the condition of the carrier corresponding to the secondary cell.

[0160] In some embodiments, the time domain location of the reference signal is the slot that the reference signal occupies and / or a pre-defined location within the slot.

[0161] In some embodiments, referring to FIG. 7, the apparatus further comprises a shift module 602 .

[0162] The shift module 602 is configured to shift an initial time-domain position of the reference signal if the initial time-domain position of the reference signal does not overlap with the time-domain position of the SSB of the active carrier, so that the shifted time-domain position of the reference signal overlaps with the time-domain position of the SSB of the active carrier.

[0163] In some embodiments, the status of the carrier corresponding to the secondary cell is determined based on at least one of a measurement periodicity of the secondary cell, a frequency range in which the secondary cell resides, or whether the secondary cell is known.

[0164] In some embodiments, the reference signal is a tracking reference signal (TRS).

[0165] As for the apparatus in the above embodiment, the specific aspects of the operations performed by each module have already been described in detail in the method embodiment, so they will not be described in detail here.

[0166] The shifting module 602 may be a processing module, and may be a processor in a specific implementation. The sending module 601 may be a transmitter or a transceiver in a specific implementation.

[0167] 8 shows a schematic block diagram of a communication device provided by an exemplary embodiment of the present application. The communication device includes a processor 801, a receiver 802, a transmitter 803, a memory 804 and a bus 805.

[0168] The processor 801 includes one or more processing cores, and the processor 801 executes various functional applications and information processing by executing software programs and modules.

[0169] The receiver 802 and the transmitter 803 may be implemented as communication components.

[0170] The memory 804 is connected to the processor 801 via a bus 805 .

[0171] The memory 804 is configured to store at least one program code, and the processor 801 executes said at least one program code such that the communication device implements the steps of the above-mentioned method embodiments.

[0172] Furthermore, the communication device may be a terminal or a base station. The memory 804 may be implemented by any type of volatile or non-volatile storage device or combination thereof, including but not limited to magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, and programmable read-only memory (PROM).

[0173] In an exemplary embodiment, a computer-readable storage medium is also provided, the storage medium storing executable program code, the executable program code being loaded and executed by a processor to realize a method of activating a secondary cell performed by a communications device provided by each of the method embodiments described above.

[0174] Those skilled in the art will understand that all or part of the steps for implementing the above-mentioned embodiments may be executed by hardware, or may be executed by a program instructing relevant hardware. The program may be stored in a computer-readable storage medium. The storage medium may be a read-only memory, a magnetic disk, an optical disk, etc.

[0175] The above description is merely a selectable embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the protection scope of the present application.

Claims

1. A method for activating a secondary cell applied to a terminal, comprising: receiving a reference signal active signal used to activate a reference signal; receiving the reference signal based on the reference signal active signaling and activating the secondary cell; The reference signal is used to activate the secondary cell; The time domain length of the reference signal is indicated by a reference signal configuration signaling transmitted by a network device, the time domain length of the reference signal is represented by a number of repeated transmissions of the reference signal, and the number of time domain positions occupied by the reference signal is four times the number of repeated transmissions.

13. A method for activating a secondary cell, comprising:

2. The reference signal active signaling is either a MAC CE or a DCI.

2. The method of claim 1 .

3. The reference signal active signaling is a MAC CE, and a start time domain position of the reference signal is a time domain position corresponding to a first preset period after a time when the MAC CE is transmitted, or a start time domain position of the reference signal is a time domain position corresponding to a second preset period after a time when a confirmation message of the MAC CE is transmitted.

2. The method of claim 1 .

4. The reference signal is a tracking reference signal (TRS). The method according to any one of claims 1 to 3.

5. A method for activating a secondary cell applied to a network device, comprising: transmitting a reference signal active signaling to activate the reference signal; transmitting the reference signal based on the reference signal active signaling; The reference signal is used to activate a secondary cell; The time domain length of the reference signal is indicated by a reference signal configuration signaling transmitted by the network device, the time domain length of the reference signal is represented by the number of repeated transmissions of the reference signal, and the number of time domain positions occupied by the reference signal is four times the number of repeated transmissions.

13. A method for activating a secondary cell, comprising:

6. The reference signal active signaling is either a MAC CE or a DCI.

6. The method of claim 5 .

7. The reference signal active signaling is a MAC CE, and a start time domain position of the reference signal is a time domain position corresponding to a first preset period after a time when the MAC CE is transmitted, or a start time domain position of the reference signal is a time domain position corresponding to a second preset period after a time when a confirmation message of the MAC CE is transmitted.

6. The method of claim 5 .

8. The reference signal is a tracking reference signal (TRS). The method according to any one of claims 5 to 7.

9. A processor; a transceiver coupled to the processor; a memory for storing executable program code of said processor; The processor is configured to load and execute the executable program code so that the terminal can implement the method for activating a secondary cell according to any one of claims 1 to 4. A terminal characterized by:

10. A processor; a transceiver coupled to the processor; a memory for storing executable program code of said processor; The processor is configured to load and execute the executable program code so as to enable a network device to implement the method for activating a secondary cell according to any one of claims 5 to 8. A network device comprising:

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