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

Abstract

The present application discloses a method, apparatus, device, and storage medium for activating a secondary cell and relates to the field of mobile communications. The method comprises the steps of receiving a reference signal activation signaling for activating a reference signal—the reference signal being used to activate a secondary cell—and receiving the reference signal based on the reference signal activation signaling and activating the secondary cell. There is no need to wait for the reception of a first SSB to activate the secondary cell, thereby reducing the waiting time for the reception of the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

Description

Technology Field

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

[0002] New Radio (NR) systems can support larger bandwidths by using a carrier aggregation (CA) method, and terminals can receive or transmit data from multiple carrier-aggregated cells. Each aggregated cell includes one primary cell and multiple secondary cells, and since the secondary cells are initially in a disabled state, the terminal must activate the secondary cells to transmit and receive data.

[0003] Currently, the terminal receives a Media Access Control (MAC) Control Element (CE) transmitted from a network device to activate a secondary cell, returns an acknowledgment message indicating that the MAC CE has been received, and after returning the acknowledgment message and waiting for a preset period, receives the first Synchronization Signal Block (SSB), interprets the SSB, determines the use of the secondary cell, and activates the secondary cell. However, because the waiting time for the terminal to receive the SSB is relatively long, the activation of the secondary cell takes a long time.

[0004] Embodiments of the present application provide a method, apparatus, device, and storage medium for activating a secondary cell, thereby reducing the reception waiting time of the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell. The technical solution is as follows.

[0005] According to one aspect of the present application, a method for activating a secondary cell applied to a terminal is provided, said method

[0006] A step of receiving a reference signal activation signaling to activate a reference signal—the reference signal is used to activate a secondary cell—and

[0007] It includes the step of receiving the reference signal based on the reference signal activation signaling and activating the secondary cell.

[0008] According to one aspect of the present application, a method for activating a secondary cell applied to a network device is provided, said method

[0009] A step of transmitting a reference signal activation signaling to activate a reference signal—the reference signal is used to activate a secondary cell—and

[0010] It includes the step of transmitting the reference signal based on the above reference signal activation signaling.

[0011] According to one aspect of the present application, a device for activating a secondary cell applied to a terminal is provided, the device comprising a receiving module and an activation module, and

[0012] The receiving module is configured to receive reference signal activation signaling for activating a reference signal, and the reference signal is used to activate a secondary cell, and

[0013] The receiving module receives the reference signal based on the reference signal activation signaling, and

[0014] The above activation module is configured to activate the above secondary cell.

[0015] According to one aspect of the present application, a device for activating a secondary cell applied to a network device is provided, said device

[0016] It includes a transmitting module configured to transmit a reference signal activation signaling to activate a reference signal—the reference signal is used to activate a secondary cell—and

[0017] The above transmission module transmits the reference signal based on the above reference signal activation signaling.

[0018] According to one aspect of the present application, a terminal is provided, said terminal comprises a processor, a transceiver connected to said processor, and a memory for storing executable program code of said processor, said processor is configured to load and execute said executable program code so as to enable the terminal to realize a method of activating a secondary cell as described in the aspect above.

[0019] According to one aspect of the present application, a network device is provided, the network device comprises 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 said executable program code so as to enable the network device to realize a method of activating a secondary cell as described in the aspect above.

[0020] According to one aspect of the present application, a computer-readable storage medium is provided, wherein executable program code is stored in the computer-readable storage medium, and the executable program code is loaded and executed by a processor to realize a method for activating a secondary cell as described in the aspect above.

[0021] The technical solution provided in the embodiments of the present application includes at least the following beneficial effects.

[0022] According to the method, apparatus, device, and storage medium provided in the embodiments of the present application, a terminal can activate a secondary cell after receiving a reference signal based on reference signal activation signaling, and does not need to wait for the reception of the first SSB to activate the secondary cell, thereby reducing the waiting time for the reception of the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell. Brief explanation of the drawing

[0023] To more clearly explain the technical methods of the embodiments of the present application, the drawings used in the description of the embodiments are briefly introduced. To be clear, the drawings in the description are only some embodiments of the present application, and a person skilled in the art can obtain other drawings from these drawings without creative effort. FIG. 1 shows a schematic diagram of a carrier set provided by an exemplary embodiment of the present application. FIG. 2 shows a block diagram of a communication system provided by an exemplary embodiment of the present application. FIG. 3 shows a flowchart of a method for activating a secondary cell provided by an exemplary embodiment of the present application. FIG. 4 shows a block diagram of a device for activating a secondary cell provided by an exemplary embodiment of the present application. FIG. 5 shows a block diagram of a device for activating a secondary cell provided by an exemplary embodiment of the present application. FIG. 6 shows a block diagram of a device for activating a secondary cell provided by an exemplary embodiment of the present application. FIG. 7 shows a block diagram of a device for activating a secondary cell provided by an exemplary embodiment of the present application. FIG. 8 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application. Specific details for implementing the invention

[0024] To further clarify the purpose, technical solution, and advantages of the present application, the method of implementation of the present application will be described in more detail with reference to the drawings below.

[0025] It should be understood that while terms such as "first," "second," etc., used in this application may be used to describe various concepts, these concepts are not limited by such terms unless otherwise specified. These terms are used solely to distinguish one concept from another.

[0026] First, the terms mentioned in the embodiments of the present application are briefly introduced.

[0027] 1. Carrier set

[0028] By utilizing federated scheduling and resources from multiple component carriers, NR systems are enabled to support larger bandwidths. Depending on whether the aggregated carriers are continuous in the spectrum, carrier sets can be divided into continuous carrier sets and discontinuous carrier sets. Depending on whether the frequency bands containing the aggregated carriers are the same, carrier sets can be divided into in-band carrier sets and inter-band carrier sets.

[0029] The carriers in a carrier aggregation include a PCC (Primary Cell Component) and a SCC (Secondary Cell Component). There is only one PCC, and the PPC is the carrier corresponding to the primary cell. The PCC provides RRC signaling connections, NAS (Non-Access Stratrum) functions, or security services. The SCC provides additional radio resources. Both the PCC and the SCC are service cells. In an NR system, the maximum number of carriers aggregated through a carrier aggregation is 5, the maximum bandwidth after aggregation is 100 MHz (megahertz), and all aggregated carriers belong to the same base station.

[0030] For example, as shown in Fig. 1, one carrier set includes 5 carriers, each carrier has a bandwidth of 20 MHz, and the maximum bandwidth after the set is 100 MHz.

[0031] In a specific example, carriers aggregated through a carrier set use the same Cell Radio Network Temporary Identifier (C-RNTI), and the base station ensures that C-RNTIs do not collide in the cells where each carrier is located. Since the carrier set includes asymmetric and symmetric carrier sets, the aggregated carriers must include a downlink but may not include an uplink.

[0032] 2. Activation of the secondary cell

[0033] A secondary cell is configured through Radio Resource Control (RRC) signaling, and the initial state of the secondary cell is inactive. Since the secondary cell cannot transmit or receive data in the inactive state, the secondary cell must be activated, and the activated secondary cell can transmit or receive data.

[0034] 3. Reference signal The reference signal is TRS or CSI RS. Below, the reference signal is explained using TRS as an example.

[0035] TRS occupies symbols at preset positions in each slot. For example, TRS occupies the fifth and ninth symbols in a slot.

[0036] FIG. 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).

[0037] The access network (12) includes several network devices (120). A network device (120) may be a device that provides wireless communication functions to a terminal. A network device (120) may be various types of base stations (e.g., macro base stations, micro base stations, relay stations) or access points. In systems using different wireless access technologies, the name of the device with base station functions may differ. For example, in an LTE system, it is called an eNodeB or eNB. In a 5G NR-U system, it is called a gNodeB or gNB. The term 'base station' may change depending on the advancement of communication technology. In the embodiments of the present application, for convenience, the device that provides wireless communication functions to the terminal (13) described above is collectively referred to as an access network device.

[0038] The terminal (13) may include various handheld devices equipped with wireless communication functions, vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, various types of user devices, mobile stations (MS), terminals (terminal devices), etc. For ease of explanation, the aforementioned devices are collectively referred to as terminals. The access network device (120) and the terminal (13) communicate with each other through a specific public interface technology, such as a Uu interface.

[0039] The technical solution of the embodiments of the present application relates to various communication systems, e.g., Global System of Mobile communication (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Advanced Long Term Evolution (LTE-A) systems, New Radio (NR) systems, evolutionary systems of NR systems, LTE-based access to unlicensed spectrum (LTE-U) systems, NR-U systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access, It can be applied to WiMAX communication systems, Wireless Local Area Networks (WLAN), WiFi (Wireless Fidelity), next-generation communication systems, or other communication systems.

[0040] Generally, conventional communication systems support a limited number of connections and are easy to implement; however, with the advancement of communication technology, mobile communication systems will not only support conventional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication. The embodiments of the present application may be applied to such communication systems as well.

[0041] FIG. 3 shows a flowchart of a method for activating a secondary cell provided by an exemplary embodiment of the present application. This method is applied to a terminal and a network device illustrated in FIG. 2 and includes at least some of the following.

[0042] In 310, the network device transmits a reference signal enable signaling.

[0043] In 320, the terminal receives reference signal activation signaling.

[0044] The above reference signal activation signaling is used to activate the reference signal. Additionally, the above reference signal activation signaling may be of other types of signals, and such signaling also has the function of activating the reference signal, and is not limited to the embodiments of the present application. The above reference signal is used to activate a secondary cell.

[0045] The embodiments of the present application apply to a carrier set scenario, wherein multiple carriers are set through a carrier set technology, the primary cell corresponds to one of the multiple set carriers, and the secondary cell corresponds to one of the multiple set carriers. When data needs to be transmitted using a carrier corresponding to a secondary cell, the network device transmits a reference signal activation signaling to a terminal and can activate the reference signal through the reference signal activation signaling. After the network device transmits the reference signal, the terminal activates the secondary cell based on the reference signal transmitted by the network device and transmits data using a carrier corresponding to the secondary cell.

[0046] In some embodiments, the reference signal enable signaling is one of a media access control (MAC) control element (CE) or downlink control information (DCI).

[0047] If the above reference signal activation signaling is MAC CE, the network device transmits MAC CE and the terminal receives the MAC CE, determines the secondary cell to be activated, and then activates the secondary cell based on the received reference signal.

[0048] If the above reference signal activation signaling is DCI, the network device transmits the DCI and the terminal receives the DCI, determines the secondary cell to be activated, and then activates the secondary cell based on the received reference signal.

[0049] The reference signal of the embodiment of the present application is a Tracking Reference Signal (TRS).

[0050] In 330, the network device transmits a reference signal based on reference signal activation signaling.

[0051] In 340, the terminal receives a reference signal based on reference signal activation signaling and activates a secondary cell.

[0052] In an embodiment of the present application, after the terminal receives the reference signal activation signaling, it determines the time domain location of the reference signal based on the reference signal activation signaling, receives the reference signal based on the time domain location of the reference signal, and activates a secondary cell.

[0053] First, the starting time domain location of the reference signal is explained.

[0054] In some embodiments, the terminal determines a start time domain location of the reference signal based on a time domain location that transmits the reference signal activation signaling, and begins receiving the reference signal at the start time domain location of the reference signal.

[0055] If the reference signal activation signaling involves both MAC CE or DCI cases, the determination of the reference signal's start time-domain location also involves the following two situations.

[0056] (1) When the above reference signal activation signaling is MAC CE, 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 was transmitted.

[0057] When a network device transmits a MAC CE to a terminal, and the terminal receives the MAC CE, identifies the time domain location where the MAC CE was transmitted, and then identifies the start time domain location of a reference signal based on the time domain location of the MAC CE, the network device transmits a reference signal at the start time domain location of the reference signal, and the terminal receives the reference signal at the start time domain location.

[0058] After receiving the MAC CE, the terminal must 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. Accordingly, the reference signal is received at a time domain location corresponding to the first preset period after the time the MAC CE was transmitted.

[0059] The first preset period is set by a network device, by an operator, or by other means. For example, the first preset period is 40ms, 50ms, or other values.

[0060] In a possible implementation, the first preset period is denoted in time units, for example, the first preset period is T time units. T is an integer. The time unit is a symbol or a slot.

[0061] 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 acknowledgment message of the MAC CE was transmitted.

[0062] The above acknowledgment message is a HARQ-ACK message. The terminal receives the MAC CE and interprets the MAC CE, and the terminal must also return the acknowledgment message of the MAC CE to the network device. Accordingly, a time domain position corresponding to a second preset period after the terminal transmits the acknowledgment message of the MAC CE is determined as the start time domain position of the reference signal.

[0063] The second preset period is set by a network device, by an operator, or by other means. For example, the second preset period is 20ms, 30ms, or other values.

[0064] (2) When the above reference signal activation 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 when the DCI was transmitted.

[0065] After a network device transmits a DCI to a terminal, if the terminal determines the start time domain position of a reference signal based on the time domain position of the DCI, the network device begins transmitting the reference signal at the start time domain position, and the terminal begins receiving the reference signal at the start time domain position.

[0066] After receiving the DCI, the terminal must process the DCI to obtain information contained in the DCI, and the terminal's processing of the DCI requires a certain amount of time. Accordingly, the terminal can receive the reference signal at a time domain position corresponding to a third preset period after the time the DCI was transmitted.

[0067] The above third preset period is determined by the following formula.

[0068]

[0069] Here, is the third preset period, and k and is a constant, and μ = 0, 1, 2, 3, is the processing time of PDSCH. The above It is set by a network device, by an operator, or by other means. For example, k is 64, and μ is 1 / 1966080000. In some embodiments, μ is 0 when the subcarrier spacing is 15KHz, μ is 1 when the subcarrier spacing is 30KHz, μ is 2 when the subcarrier spacing is 60KHz, and μ is 3 when the subcarrier spacing is 120KHz.

[0070] In a possible implementation, the third preset period is expressed in time units. For example, the third preset period is N time units. N is an integer.

[0071] In addition, when the frequency range to which the secondary cell belongs is FR2 (representing a frequency range, for example, 24250MHz-52600MHz), the interval between the time domain position of the DCI and the start time domain position of the reference signal is not smaller than the third preset period.

[0072] In an embodiment of the present application, a DCI is used as a reference signal activation signaling, and the start time domain position of the reference signal can be determined based on the time domain position where the DCI was transmitted. Since the terminal can complete processing for the DCI, there is no need to increase the processing speed of the terminal, thereby reducing the complexity of the terminal and improving the processing speed of the reference signal.

[0073] In another embodiment, based on determining the start time-domain position of the reference signal according to the reference signal activation signaling, it must be ensured that the start time-domain position of the reference signal overlaps with the time-domain position of the activation carrier's SSB.

[0074] In an embodiment of the present application, when multiple carriers are aggregated through carrier aggregation technology, a network device can activate different carriers and transmit and receive different information on different carriers. When the starting frequency domain location of a reference signal overlaps with the time domain location of the synchronization signal block (SSB) of an activated carrier, the terminal can detect the reference signal and the SSB at the overlapping time domain location, consider multiple carriers simultaneously, and improve the efficiency of receiving information at the terminal.

[0075] For example, the start time domain location of the reference signal is within the same slot as the SSB, and the symbol containing the reference signal is a subset or the entire set of symbols containing the SSB.

[0076] In another embodiment, the starting time domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell.

[0077] In the embodiments of the present application, since the state of the carrier corresponding to the secondary cell includes multiple states, the method of determining the start time domain position of the reference signal differs depending on the state.

[0078] The state of the carrier corresponding to the secondary cell is determined according to at least one of the measurement period of the secondary cell, the frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0079] The terminal determines the state of the carrier corresponding to the secondary cell. For example, if the secondary cell is unknown, the state of the carrier corresponding to the secondary cell is determined to be state 1, and if the frequency range to which the secondary cell belongs is FR1 (representing a frequency range, for example, 450 MHz to 6000 MHz), the state of the carrier corresponding to the secondary cell is determined to be state 2, or another state may be determined.

[0080] For example, embodiments of the present application include nine types of carrier states. The nine types of carrier states are as shown in Table 1.

[0081] Status number Carrier condition 1 The secondary cell is known to belong to FR1, and the measurement period of the secondary cell is equal to or less than 160ms. 2 The secondary cell is known to belong to FR1, and the measurement period of the secondary cell is greater than 160ms. 3 The secondary cell is unknown and belongs to FR1, and is a non-conditional It presupposes the satisfaction of (ratio). 4 Where an active secondary cell belongs to FR2 and there is one or more active service cells in the FR2 band, and - provide an SMTC for a target SCell to the terminal, and - the SSB of the service cell and the SSB of the SCell satisfy the conditions defined in Section 3.6.3, and - the parameter ssb-PositionsInBurst of the service cell and the SCell are identical. 5 If an activated secondary cell belongs to FR2 and there is one or more activated service cells in the said FR2 band, and the terminal does not provide SMTC for the target SCell at all—the reference signal (RS) of the activated SCell is QCL (Quasi Co-Location) TypeD, and the RS of one activated service cell exists in the said FR2 band 6 If an active secondary cell belongs to FR2, and a PCell (primary cell) or PSCell (primary secondary cell) is in FR1 or FR2, and there is no active service cell in the said FR2 band, and the target SCell (secondary cell) is known to the terminal, and semi-permanent CSI (Channel State Information)-RS is used for CSI reporting 7 If an active secondary cell belongs to FR2 and a PCell or PSCell is in FR1 or FR2, there is no active service cell in the said FR2 band, the target SCell is known to the terminal, and a semi-permanent CSI-RS is used for CSI reporting, or if the target SCell is known to the terminal and a periodic CSI-RS is used for CSI reporting 8 If the PCell / PSCell and target SCell are in a frequency band pair with independent beam management, the target SCell is unknown to the terminal, and a semi-permanent CSI-RS is used for CSI reporting, then the conditional It presupposes satisfaction 9 If the PCell / PSCell and target SCell are in a frequency band pair with independent beam management, the target SCell is unknown to the terminal, and periodic CSI-RS is used for CSI reporting, then the non-conditional It presupposes satisfaction

[0082] If the state of the secondary cell is determined to be any of state 2, state 3, state 6, state 7, state 8, or state 9 based on the nine types of states in Table 1, it must be ensured that the starting time-domain location of the determined reference signal is not only related to the time-domain location of the reference signal activation signaling but also overlaps with the time-domain location of the SSB.

[0083] When the state of the secondary cell is determined to be state 1 or state 4, the starting time domain position of the determined reference signal is related to the time domain position of the reference signal activation signaling.

[0084] If the state of the secondary cell is determined to be state 5, there is no need to determine the start time domain position of the reference signal.

[0085] The first thing to explain is that both the terminal and the network device of the embodiment of the present application determine the start time domain position of the reference signal in the manner described above.

[0086] The second point to be explained is that the embodiments of the present application are merely illustrative of cases where a terminal determines the start time-domain location of a reference signal based on the time-domain location of a reference signal activation signaling. In other embodiments, the start time-domain location of the reference signal may be indicated by a network device, and there is no need for the terminal to determine the time-domain location based on the reference signal activation signaling.

[0087] The above embodiment provided an explanation of a method for determining the starting time-domain position of a reference signal. Next, a method for determining the time-domain length of a reference signal will be explained.

[0088] In an embodiment of the present application, the time domain length of the reference signal can be determined in the following three ways.

[0089] (1) The time domain length of the reference signal is determined by the state of the carrier.

[0090] (2) The time domain length of the above reference signal is indicated by the reference signal configuration signaling transmitted from the network device.

[0091] (3) The time domain length of the above reference signal is a preset length.

[0092] The time domain length of the above reference signal is used to indicate the number of time domain positions corresponding to the reference signal. For example, the reference signal occupies 4 time domain positions, the reference signal occupies 6 time domain positions, or the reference signal occupies a different number of time domain positions.

[0093] The time domain length of the above reference signal is expressed as a quantity of time domain units, or the time domain length of the above reference signal is expressed as the number of repeated transmissions of the reference signal.

[0094] For example, if the time domain length of a reference signal is represented by symbols, the number of time domain positions occupied by the reference signal is equal to the number of symbols. If the time domain length of a reference signal is represented by slots, the number of time domain positions occupied by the reference signal is twice the number of slots. If the time domain length of a 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.

[0095] The embodiments of the present application merely describe the indication of the time domain length of a reference signal by the number of repeated transmissions or time domain units, and the present application is not limited to the above method and may also indicate the time domain length of a reference signal using other methods.

[0096] When determining the time domain length of a reference signal through method (1), in the case of a time-frequency synchronization function, the reference signal requires multiple time domain positions, and time-frequency synchronization is realized based on the difference between the multiple time domain positions. Alternatively, in the case of a frequency gain control function, frequency gain control can be completed with a single symbol of the reference signal, or frequency gain control can be completed even when the reference signal has multiple symbols. Through the above-described method, the time domain length of the reference signal can be determined according to the state of the carriers of different secondary cells.

[0097] Next, based on the nine types of states shown in Table 1 above, the time domain length of the reference signal as shown in Table 2 can be determined.

[0098] Status number Condition of the suitcase Number of symbols occupied by the reference signal Number of slots constituting the reference signal use 1 The secondary cell is known to belong to FR1, and the measurement period of the secondary cell is equal to or less than 160ms. 4 2 Time-frequency synchronization 2 The secondary cell is known to belong to FR1, and the measurement period of the secondary cell is greater than 160ms. 6 3 AGC settings and time frequency synchronization 3 The secondary cell is unknown and belongs to FR1, and is a non-conditional It presupposes the satisfaction of (ratio). 8 4 AGC settings and time frequency synchronization 4 Where an active secondary cell belongs to FR2 and there is one or more active service cells in the FR2 band, and - provide an SMTC for a target SCell to the terminal, and - the SSB of the service cell and the SSB of the SCell satisfy the conditions defined in Section 3.6.3, and - the parameter ssb-PositionsInBurst of the service cell and the SCell are identical. 4 2 Time-frequency synchronization 5 If an activated secondary cell belongs to FR2 and there is one or more activated service cells in the said FR2 band, and the terminal does not provide SMTC for the target SCell at all, - the RS of the activated SCell is QCL-TypeD, and there is an RS of one activated service cell in the said FR2 band 0 0 doesn't exist 6 If an active secondary cell belongs to FR2, and a PCell or PSCell is in FR1 or FR2, and there is no active service cell in the said FR2 band, and the target SCell is known to the terminal, and a semi-permanent CSI-RS is used for CSI reporting 6 3 AGC settings and time frequency synchronization 7 If an active secondary cell belongs to FR2 and a PCell or PSCell is in FR1 or FR2, there is no active service cell in the said FR2 band, the target SCell is known to the terminal, and a semi-permanent CSI-RS is used for CSI reporting, or if the target SCell is known to the terminal and a periodic CSI-RS is used for CSI reporting 6 3 AGC settings and time frequency synchronization 8 If the PCell / PSCell and target SCell are in a frequency band pair with independent beam management, the target SCell is unknown to the terminal, and a semi-permanent CSI-RS is used for CSI reporting, then the condition is It presupposes satisfaction 48 24 AGC settings and time-frequency synchronization for multiple beams 9 If the PCell / PSCell and target SCell are in a frequency band pair with independent beam management, the target SCell is unknown to the terminal, and periodic CSI-RS is used for CSI reporting, then the non-conditional It presupposes satisfaction 48 24 AGC settings and time-frequency synchronization for multiple beams

[0099] When determining the time domain length of a reference signal through method (2), the terminal does not need to determine the time domain length of the reference signal according to the carrier state of the secondary cell, and the network device can transmit a 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.

[0100] When determining the time domain length of the reference signal through method (3), the time domain length of the reference signal determined at the terminal is a preset length.

[0101] The above preset length is set by a network device, by an operator, or in another way. The above preset length is merely an example and may be a different value in actual application.

[0102] In an embodiment of the present application, by determining the time domain length of a reference signal to a preset length regardless of the carrier state of a secondary cell, the terminal reduces the operation of determining the time domain length of the reference signal and increases the efficiency of determining the time domain length of the reference signal.

[0103] Next, we will explain how to determine the time-domain location of the reference signal.

[0104] The time-domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell. The state of the carrier corresponding to the secondary cell is determined based on at least one of the measurement period of the secondary cell, the frequency range to which the secondary cell belongs, or the secondary cell is already known.

[0105] When the state of a carrier corresponding to a secondary cell completes time-domain synchronization according to a reference signal, the interval between time-domain positions of the reference signal is determined, or the reference signal includes a reference signal for frequency gain control setting and a reference signal for time-frequency synchronization. When the state of the carrier completes time-domain synchronization and frequency gain control setting according to the reference signal, the reference signal for frequency gain control setting is adjacent to the reference signal for time-frequency synchronization.

[0106] Because the carrier states differ, the terminal's dependency on the reference signal also differs. Therefore, for different carrier states, the number of time-domain positions of the reference signal and the intervals between time-domain positions also differ.

[0107] For example, in the case of state 1, the terminal completes time-frequency synchronization according to the reference signal, and there is a gap between the time domain positions of the reference signal.

[0108] In state 2, the terminal completes time-domain synchronization and frequency gain control according to the reference signal. To reduce delay time and prevent 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 a gap between the time-domain positions of the reference signal for time-frequency synchronization.

[0109] In the case of state 3, the terminal completes time-domain synchronization and frequency gain control according to the reference signal, and multiple reference signals are required because frequency gain control must be set multiple times. The multiple reference signals for frequency gain control are adjacent, and there is a gap between the multiple reference signals for time-frequency synchronization.

[0110] In the case of state 4, the terminal completes synchronization of the time frequency according to the reference signal, and there is a gap between the time domain positions of the reference signal.

[0111] In the case of state 5, there is no need to receive a reference signal from the terminal.

[0112] In the case of state 6, the terminal completes time-domain synchronization and frequency gain control according to the reference signal. To reduce delay time and prevent 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 a gap between the time-domain positions of the reference signal for time-frequency synchronization.

[0113] In the case of state 7, the terminal completes time-domain synchronization and frequency gain control according to the reference signal. To reduce delay time and prevent 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 a gap between the time-domain positions of the reference signal for time-frequency synchronization.

[0114] In the case of State 8, it is the same as State 3 for the same beam (where there is a QCL Type D relationship between signals). Multiple beams are repeatedly mapped to different symbols. There is a constant interval between different beams and satisfies the beam switching time.

[0115] In the case of State 9, it is the same as State 3 for the same beam (where there is a QCL Type D relationship between the signals). Multiple beams are repeatedly mapped to different symbols. There is a constant interval between different beams and satisfies the beam switching time.

[0116] For example, the states in Table 1 and the reference signal TRS are explained as examples, and Table 3 shows the time domain position of the reference signal corresponding to each state, and the value of x is 5.

[0117] Status number 1st column TRS 2nd column TRS 3rd column TRS 4th column TRS 1 X X+5 0 0 2 X X+1 X+5 0 3 X X+1 X+2 X+6 4 X X+5 0 0 5 0 0 0 0 6 X X+1 X+5 0 7 X X+1 X+5 0 8 X X+1 X+2 X+6 9 X X+1 X+2 X+6

[0118] In some other embodiments, the time domain position of the reference signal is the slot occupied by the reference signal and / or a preset position within the slot.

[0119] In an embodiment of the present application, when all carriers corresponding to the secondary cell satisfy the above conditions, each time domain position of the reference signal is determined using the existing format of the time domain position of the reference signal. For example, as can be seen in Table 4, the time domain positions of the reference signal occupy the fifth and ninth symbols of the slot, and the value of x is 5.

[0120] Status number 1st row TRS 2nd row TRS 3rd column TRS 4th column TRS 5th column TRS 6th column TRS 7th column TRS 8th column TRS 1 X X+4 X+14 X+18 0 0 0 0 2 X X+4 X+14 X+18 X+28 X+32 0 0 3 X X+4 X+14 X+18 X+28 X+32 X+42 X+46 4 X X+4 X+14 X+18 0 0 0 0 5 0 0 0 0 0 0 0 0 6 X X+4 X+14 X+18 X+28 X+32 0 0 7 X X+4 X+14 X+18 X+28 X+32 0 0 8 X X+4 X+14 X+18 X+28 X+32 8 cycles 9 X X+4 X+14 X+18 X+28 X+32 8 cycles

[0121] If the initial time-domain position of the reference signal does not overlap with the time-domain position of the SSB of the activation carrier, the initial time-domain position of the reference signal is offset, and the time-domain position of the reference signal after the offset overlaps with the time-domain position of the SSB.

[0122] In some other embodiments, if the reference signal has a quasi-co-positional relationship with the SSB or CSI RS, measurements related to the SSB or CSI can be performed according to the reference signal.

[0123] Quasi-joint positional relationships include four types: quasi-joint positional relationships of type A, quasi-joint positional relationships of type B, quasi-joint positional relationships of type C, and quasi-joint positional relationships of type D.

[0124] The quasi-co-positional relationship of Type A is characterized by Doppler frequency offset, Doppler extension, mean delay, and delay extension; the quasi-co-positional relationship of Type B is characterized by Doppler frequency offset and Doppler extension; the quasi-co-positional relationship of Type C is characterized by Doppler frequency offset and mean delay; and the quasi-co-positional relationship of Type D is characterized by spatial reception parameters.

[0125] (1) If the reference signal and the SSB have a shared positional relationship, the SSB is detected according to the reference signal.

[0126] The reference signal and the SSB have a quasi-coordinate relationship of type C, or a quasi-coordinate relationship of type C and type D.

[0127] (2) When the reference signal and the channel status indicator reference signal (CSI RS) used for channel status indicator (CSI) measurement have a quasi-coordinate positional relationship, the CSI measurement is performed according to the reference signal.

[0128] The reference signal and the CSI RS have a quasi-coordinate relationship of type A, or a quasi-coordinate relationship of type B, or a quasi-coordinate relationship of type A and type D.

[0129] It should be noted that the embodiments of this application describe examples where the reference signal and the SSB or CSI measurement have a quasi-coordinate relationship. In other embodiments, the reference signal does not have a quasi-coordinate relationship with the SSB or CSI, and the reference signal received at the terminal is used only for frequency gain control or time-frequency synchronization.

[0130] According to the method provided in the embodiment of the present application, the terminal can activate a secondary cell after receiving a reference signal based on reference signal activation signaling, and there is no need to wait for the reception of the first SSB to activate the secondary cell, thereby reducing the waiting time for the reception of the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

[0131] In addition, the terminal can save its resources by reducing the processing resources consumed during the analysis process by activating the secondary cell according to the received reference signal without the need to analyze the SSB.

[0132] In addition, by defining the starting resource location of the reference signal, the time domain length of the reference signal, and the time domain location of the reference signal, respectively, it is ensured that the reference signal can activate the secondary cell under any circumstances, thereby improving the efficiency of activating the secondary cell.

[0133] In addition, the time domain length of the reference signal can be determined in various ways, increasing flexibility when determining the reference signal and improving flexibility in activating secondary cells.

[0134] FIG. 4 shows a block diagram of a device for activating a secondary cell provided by an exemplary embodiment of the present application, said device applied to a terminal. The device includes a receiving module (401) and an activation module (402).

[0135] The receiving module (401) receives a reference signal activation signaling to activate a reference signal, and the reference signal is used to activate a secondary cell.

[0136] The receiving module (401) receives a reference signal based on reference signal activation signaling.

[0137] The activation module (402) is used to activate the secondary cell.

[0138] According to the device provided through an embodiment of the present application, the terminal can activate a secondary cell after receiving a reference signal based on reference signal activation signaling, and there is no need to wait for the reception of the first SSB to activate the secondary cell, thereby reducing the waiting time for the reception of the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

[0139] In some embodiments, the reference signal activation signaling is one of MAC CE or DCI.

[0140] In some embodiments, the reference signal activation signaling is a MAC CE, and the start time domain location of the reference signal is a time domain location corresponding to a first preset period after the time when the MAC CE was transmitted, or the start time domain location of the reference signal is a time domain location corresponding to a second preset period after the time when the acknowledgment message of the MAC CE was transmitted.

[0141] In some embodiments, the reference signal activation signaling is DCI, and the start time domain position of the reference signal is a time domain position corresponding to a third preset period after the time when the DCI was transmitted.

[0142] In some embodiments, the third preset period is determined by the following formula.

[0143]

[0144] is the third preset period, k and Tc are constants, and μ=0, 1, 2, 3, N1 is the processing time of PDSCH.

[0145] In some embodiments, the start time domain location of the reference signal overlaps with the time domain location of the activation carrier's SSB.

[0146] In some embodiments, the starting time domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell.

[0147] In some embodiments, the time domain length of the reference signal is determined according to the state of the carrier corresponding to the secondary cell, the time domain length of the reference signal is indicated by the reference signal configuration signaling transmitted from the network device, or the time domain length of the reference signal is a preset length.

[0148] In some embodiments, the time domain length of the reference signal is expressed as a quantity of time domain units, or the time domain length of the reference signal is expressed as the number of repeated transmissions of the reference signal.

[0149] In some embodiments, the time domain unit is a symbol, or the time domain unit is a slot.

[0150] In some embodiments, the time-domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell.

[0151] In some embodiments, the time domain position of the reference signal is the slot occupied by the reference signal and / or a preset position within the slot.

[0152] In some embodiments, referring to FIG. 5, the device further includes an offset module (403).

[0153] The offset module (403) is configured to offset the 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 activation carrier, and the time domain position of the reference signal after the offset overlaps with the time domain position of the SSB of the activation carrier.

[0154] In some embodiments, the state of the carrier corresponding to the secondary cell is determined according to at least one of the measurement period of the secondary cell, the frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0155] In some embodiments, the reference signal is a trace reference signal (TRS).

[0156] Regarding the device of the above-described embodiment, the specific method by which each module performs its task has already been described in detail in the embodiment of the method, so it will not be described in further detail.

[0157] The above-mentioned activation module (402) or offset module (403) may be a processing module, and in a specific implementation, it may be a processor. The above-mentioned receiving module (401) may be a receiver or a transceiver in a specific implementation.

[0158] FIG. 6 shows a block diagram of a device for activating a secondary cell provided by an exemplary embodiment of the present application, said device applied to a network device. said device includes a transmission module (601).

[0159] The transmission module (601) is configured to transmit a reference signal activation signaling to activate a reference signal, and the reference signal is used to activate a secondary cell.

[0160] The transmission module (601) transmits a reference signal based on reference signal activation signaling.

[0161] According to the device provided by an embodiment of the present application, the terminal can activate a secondary cell after receiving a reference signal based on reference signal activation signaling, and does not need to wait for the reception of the first SSB to activate the secondary cell, thereby reducing the waiting time for the reception of the first SSB, reducing the time delay for activating the secondary cell, and improving the accuracy of activating the secondary cell.

[0162] In some embodiments, the reference signal activation signaling is one of MAC CE or DCI.

[0163] In some embodiments, the reference signal activation signaling is a MAC CE, and the start time domain location of the reference signal is a time domain location corresponding to a first preset period after the time when the MAC CE was transmitted, or the start time domain location of the reference signal is a time domain location corresponding to a second preset period after the time when the acknowledgment message of the MAC CE was transmitted.

[0164] In some embodiments, the reference signal activation signaling is DCI, and the start time domain position of the reference signal is a time domain position corresponding to a third preset period after the time when the DCI was transmitted.

[0165] In some embodiments, the third preset period is determined by the following formula.

[0166]

[0167] is the third preset period, k and Tc are constants, and μ=0, 1, 2, 3, N1 is the processing time of PDSCH.

[0168] In some embodiments, the start time domain location of the reference signal overlaps with the time domain location of the activation carrier's SSB.

[0169] In some embodiments, the starting time domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell.

[0170] In some embodiments, the time domain length of the reference signal is determined according to the state of the carrier corresponding to the secondary cell, the time domain length of the reference signal is indicated by the reference signal configuration signaling transmitted from the network device, or the time domain length of the reference signal is a preset length.

[0171] In some embodiments, the time domain length of the reference signal is expressed as a quantity of time domain units, or the time domain length of the reference signal is expressed as the number of repeated transmissions of the reference signal.

[0172] In some embodiments, the time domain unit is a symbol, or the time domain unit is a slot.

[0173] In some embodiments, the time-domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell.

[0174] In some embodiments, the time domain position of the reference signal is the slot occupied by the reference signal and / or a preset position within the slot.

[0175] In some embodiments, referring to FIG. 7, the device further includes an offset module (602).

[0176] The offset module (602) is configured to offset the 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 activation carrier, and the time domain position of the reference signal after the offset overlaps with the time domain position of the SSB of the activation carrier.

[0177] In some embodiments, the state of the carrier corresponding to the secondary cell is determined according to at least one of the measurement period of the secondary cell, the frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0178] In some embodiments, the reference signal is a trace reference signal (TRS).

[0179] Regarding the device of the above-described embodiment, the specific method by which each module performs its task has already been described in detail in the embodiment of the method, so it will not be described in further detail.

[0180] The offset module (602) may be a processing module, and in a specific implementation, it may be a processor. The transmission module (601) may be a transmitter or a transceiver in a specific implementation.

[0181] FIG. 8 shows a schematic structural 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).

[0182] The processor (801) includes one or more processing cores, and the processor (801) executes software programs and modules to perform various functional applications and information processing.

[0183] The receiver (802) and the transmitter (803) can be implemented as a single communication component.

[0184] The memory (804) is connected to the processor (801) via the bus (805).

[0185] The memory (804) may be configured to store at least one program code, and the processor (801) executes the at least one program code to enable the communication device to perform each step of the method embodiment described above.

[0186] 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 a combination thereof, and the volatile or non-volatile storage device includes, but is not limited to, a disk or optical media, electrically erasable and programmable read-only memory (EEPROM), erasable and programmable read-only memory (EEPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, and programmable read-only memory (PROM).

[0187] In an exemplary embodiment, a computer-readable storage medium storing executable program code is provided, and the executable program code is loaded and executed by the processor to realize a method for activating a secondary cell executed by a communication device provided in each of the method embodiments described above.

[0188] Those skilled in the art will understand that all or part of the procedures for realizing the above-described embodiments may be completed by hardware, or by directing the relevant hardware through a program, and that said program may be stored on a computer-readable storage medium. said storage medium may be read-only memory, a disk, or optical media.

[0189] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. All modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the embodiments of the present application.

Claims

Claim 1 A method for activating a secondary cell applied to a terminal, comprising the steps of: receiving a reference signal activation signaling for activating a reference signal—the reference signal being used to activate the secondary cell—and receiving the reference signal based on the reference signal activation signaling and activating the secondary cell, wherein the time domain length of the reference signal is indicated by a reference signal configuration signaling transmitted from a network device, the time domain length of the reference signal is indicated 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. Claim 2 A method according to claim 1, wherein the reference signal activation signaling is one of MAC CE or DCI. Claim 3 A method according to claim 1, wherein the reference signal activation signaling is a MAC CE, and the start time domain position of the reference signal is a time domain position corresponding to a first preset period after the time at which the MAC CE was transmitted, or the start time domain position of the reference signal is a time domain position corresponding to a second preset period after the time at which the confirmation message of the MAC CE was transmitted. Claim 4 A method according to claim 1, characterized in that the reference signal is a tracking reference signal (TRS). Claim 5 A method for activating a secondary cell applied to a network device, comprising the steps of: transmitting a reference signal activation signaling to activate a reference signal—the reference signal being used to activate the secondary cell—and transmitting the reference signal based on the reference signal activation signaling, wherein the time domain length of the reference signal is indicated by a reference signal configuration signaling transmitted from the network device, the time domain length of the reference signal is indicated 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. Claim 6 A method according to claim 5, wherein the above reference signal activation signaling is one of MAC CE or DCI. Claim 7 A method according to claim 5, wherein the reference signal activation signaling is a MAC CE, and the start time domain position of the reference signal is a time domain position corresponding to a first preset period after the time at which the MAC CE was transmitted, or the start time domain position of the reference signal is a time domain position corresponding to a second preset period after the time at which the confirmation message of the MAC CE was transmitted. Claim 8 A method according to claim 5, characterized in that the reference signal is a tracking reference signal (TRS). Claim 9 A terminal comprising a processor, a transceiver connected to the processor, and a memory for storing executable program code of the processor, wherein the processor is configured to load and execute said executable program code so as to enable the terminal to realize a method of activating a secondary cell described in any one of claims 1 to 4. Claim 10 A network device comprising a processor, a transceiver connected to the processor, and a memory for storing executable program code of the processor, wherein the processor is configured to load and execute said executable program code so as to enable the network device to realize a method of activating a secondary cell described in any one of claims 5 to 8. Claim 11 A computer-readable storage medium characterized by storing executable program code, wherein said executable program code is loaded and executed by a processor to realize a method of activating a secondary cell described in any one of claims 1 to 4. Claim 12 A computer-readable storage medium characterized by storing executable program code, wherein said executable program code is loaded and executed by a processor to realize a method of activating a secondary cell described in any one of claims 5 to 8. 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