Secondary cell activation method, device, equipment and storage medium

Abstract

The present application discloses a secondary cell activation method, device, equipment and storage medium, and relates to the field of mobile communications. The method includes: receiving a reference signal activation signaling, the reference signal activation signaling is used to activate a reference signal, and the reference signal is used to activate the secondary cell; based on the reference signal activation signaling, receiving a reference signal and activating the secondary cell. There is no need to wait for the first SSB to be received to activate the secondary cell, which reduces the waiting time for receiving the first SSB, thereby reducing the delay in activating the secondary cell and improving the accuracy of activating the secondary cell.

Description

[0001] This application is a divisional application. The application number of the parent application is 202080103961.9, the application date is October 22, 2020, and the name of the invention is "Secondary cell activation method, device, equipment and storage medium". Technical Field

[0002] The present application relates to the field of mobile communications, and in particular to a method, device, equipment and storage medium for activating a secondary cell. Background Art

[0003] In the NR (New Radio) system, carrier aggregation can be used to support a larger bandwidth, and the terminal can receive or send data from multiple cells aggregated by the carrier. The multiple aggregated cells include a primary cell and multiple secondary cells, and the initial state of the secondary cell is a deactivated state. The terminal needs to activate the secondary cell to receive or send data.

[0004] At present, the terminal receives a MAC (Media Access Control) CE (Control Element) sent by a network device for activating a secondary cell, returns a confirmation message of receiving the MAC CE, and receives the first SSB Synchronization Signal Block after a preset time after returning the confirmation message, parses the SSB, determines to use the secondary cell, and thus activates the secondary cell. However, due to the long delay in the terminal waiting to receive the SSB, it takes a long time to activate the secondary cell. Summary of the invention

[0005] The embodiments of the present application provide a method, apparatus, device and storage medium for activating a secondary cell, which reduces the time for waiting to receive the first SSB, thereby reducing the delay for activating the secondary cell and improving the accuracy of activating the secondary cell. The technical solution is as follows:

[0006] According to one aspect of the present application, a secondary cell activation method is provided, which is applied to a terminal, and the method includes:

[0007] receiving a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, where the reference signal is used for secondary cell activation;

[0008] Based on the reference signal activation signaling, the reference signal is received, and the secondary cell is activated.

[0009] According to one aspect of the present application, a secondary cell activation method is provided, which is applied to a network device, and the method includes:

[0010] Sending a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, where the reference signal is used for secondary cell activation;

[0011] Based on the reference signal activation signaling, the reference signal is sent.

[0012] According to one aspect of the present application, a secondary cell activation device is provided, which is set in a terminal, and the device includes:

[0013] A receiving module, configured to receive a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, where the reference signal is used to activate a secondary cell;

[0014] The receiving module is configured to receive the reference signal based on the reference signal activation signaling;

[0015] An activation module is used to activate the secondary cell.

[0016] According to one aspect of the present application, a secondary cell activation device is provided, which is set in a network device, and the device includes:

[0017] A sending module, used for sending a reference signal activation signaling, where the reference signal activation signaling is used for activating a reference signal, where the reference signal is used for secondary cell activation;

[0018] The sending module is used to send the reference signal based on the reference signal activation signaling.

[0019] According to one aspect of the present application, a terminal is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing an executable program code of the processor; wherein the processor is configured to load and execute the executable program code so that the terminal implements the secondary cell activation method as described in the above aspect.

[0020] According to one aspect of the present application, a network device is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing an executable program code of the processor; wherein the processor is configured to load and execute the executable program code so that the network device implements the secondary cell activation method as described in the above aspect.

[0021] According to one aspect of the present application, a computer-readable storage medium is provided, in which an executable program code is stored. The executable program code is loaded and executed by the processor to implement the secondary cell activation method as described in the above aspect.

[0022] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0023] The methods, devices, equipment and storage media provided in the embodiments of the present application enable the terminal to receive the reference signal based on the reference signal activation signaling, and then activate the secondary cell. There is no need to wait for receiving the first SSB to activate the secondary cell, which reduces the waiting time for receiving the first SSB, thereby reducing the delay in activating the secondary cell and improving the accuracy of activating the secondary cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of carrier aggregation provided by an exemplary embodiment of the present application is shown;

[0026] Figure 2 A block diagram of a communication system provided by an exemplary embodiment of the present application is shown;

[0027] Figure 3 A flowchart of a secondary cell activation method provided by an exemplary embodiment of the present application is shown;

[0028] Figure 4 A block diagram of a secondary cell activation device provided by an exemplary embodiment of the present application is shown;

[0029] Figure 5 A block diagram of a secondary cell activation device provided by an exemplary embodiment of the present application is shown;

[0030] Figure 6 A block diagram of a secondary cell activation device provided by an exemplary embodiment of the present application is shown;

[0031] Figure 7 A block diagram of a secondary cell activation device provided by an exemplary embodiment of the present application is shown;

[0032] Figure 8 A schematic diagram of the structure of a communication device provided by an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0034] It can be understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept.

[0035] First, the nouns involved in the embodiments of the present application are briefly introduced:

[0036] 1. Carrier aggregation:

[0037] By jointly scheduling and using resources on multiple component carriers, the NR system supports a larger bandwidth. Depending on whether the aggregated carriers are continuous in the spectrum, carrier aggregation can be divided into continuous carrier aggregation and non-continuous carrier aggregation. Depending on whether the frequency bands of the aggregated carriers are the same, carrier aggregation can be divided into intra-band carrier aggregation and inter-band carrier aggregation.

[0038] The carriers in carrier aggregation include PCC (Primary Cell Component) and SCC (Secondary Cell Component). Among them, there is only one PCC, which is the carrier corresponding to the primary cell. The PCC provides RRC signaling connection, NAS (Non-Access Stratrum) function, or security services, etc. SCC provides additional wireless resources. Both PCC and SCC are service cells. In the NR system, the maximum number of carriers aggregated by carrier is 5, and the maximum bandwidth after aggregation is 100MHZ (megahertz), and the aggregated carriers all belong to the same base station.

[0039] For example, Figure 1 As shown, one carrier aggregation includes 5 carriers, the bandwidth of each carrier is 20 MHz, and the maximum bandwidth after aggregation is 100 MHz.

[0040] In a specific example, the carriers aggregated by carrier aggregation use the same cell radio network temporary identifier C-RNTI, and the base station can ensure that the C-RNTI does not conflict in the cell where each carrier is located. Since carrier aggregation includes asymmetric carrier aggregation and symmetric carrier aggregation, the aggregated carriers are required to include downlink, but may not include uplink.

[0041] 2. Secondary cell activation:

[0042] The secondary cell is configured through RRC (Radio Resource Control) signaling, and the initial state of the secondary cell is a deactivated state. In the deactivated state, the secondary cell cannot receive and send data. The secondary cell needs to be activated, and the activated secondary cell can receive and send data.

[0043] 3. Reference signal: The reference signal is TRS or CSI RS. The reference signal is described below using TRS as an example.

[0044] The TRS occupies symbols at preset positions in each time slot. For example, the TRS occupies the 5th symbol and the 9th symbol in a time slot.

[0045] Figure 2 A block diagram of a communication system provided by an exemplary embodiment of the present application is shown. The communication system may include: an access network 12 and a terminal 13.

[0046] The access network 12 includes several network devices 120. The network device 120 can be a device that provides wireless communication functions for the terminal. The network device 120 can be various forms of base stations (such as 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 functions may be different. For example, in LTE systems, they are called eNodeB or eNB; in 5G NR-U systems, they are called gNodeB or gNB. With the evolution of communication technology, the description of "base station" may change. For the convenience of the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal 13 are collectively referred to as access network devices.

[0047] The terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (MS), terminals, etc. For the convenience of description, the above-mentioned devices are collectively referred to as terminals. The access network device 120 and the terminal 13 communicate with each other through some air interface technology, such as a Uu interface.

[0048] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Network (WLAN) system. Networks, WLAN), Wireless Fidelity (WiFi), next generation communication systems or other communication systems, etc.

[0049] Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication and vehicle to everything (V2X) system, etc. The embodiments of the present application can also be applied to these communication systems.

[0050] Figure 3A flowchart of a secondary cell activation method provided by an exemplary embodiment of the present application is shown, which is applied to Figure 2 In the terminal and network device shown, the method includes at least part of the following contents:

[0051] 310. The network device sends a reference signal activation signaling.

[0052] 320. The terminal receives reference signal activation signaling.

[0053] The reference signal activation signaling is used to activate the reference signal. In addition, the reference signal activation signaling may also be other types of signaling, and these signalings also have the function of activating the reference signal, which is not limited in the embodiments of the present application. The reference signal is used to activate the secondary cell.

[0054] The embodiment of the present application is applied in a carrier aggregation scenario. If multiple carriers are aggregated through carrier aggregation technology, the primary cell corresponds to one of the aggregated multiple carriers, and the secondary cell corresponds to another of the aggregated multiple carriers. When it is necessary to use the carrier corresponding to the secondary cell to transmit data, the network device sends a reference signal activation signaling to the terminal, and the reference signal can be activated through the reference signal activation signaling. The network device sends a reference signal, and then the terminal activates the secondary cell based on the reference signal sent by the network device, and uses the carrier corresponding to the secondary cell to transmit data.

[0055] In some embodiments, the reference signal activation signaling is any one of MAC (Medium Access Control) CE (Control Element) or DCI (Downlink Control Information).

[0056] If the reference signal activation signaling is a MAC CE, the network device sends the MAC CE, the terminal receives the MAC CE, determines a secondary cell to be subsequently activated, and then activates the secondary cell based on the received reference signal.

[0057] If the reference signal activation signaling is DCI, the network device sends the DCI, the terminal receives the DCI, determines the secondary cell to be subsequently activated, and then activates the secondary cell based on the received reference signal.

[0058] Among them, the reference signal in the embodiment of the present application is TRS (Tracking Reference Signal).

[0059] 330. The network device sends a reference signal based on the reference signal activation signaling.

[0060] 340. The terminal receives the reference signal based on the reference signal activation signaling and activates the secondary cell.

[0061] In the embodiment of the present application, after receiving the reference signal activation signaling, the terminal determines the time domain position of the reference signal based on the reference signal activation signaling, and then receives the reference signal based on the time domain position of the reference signal to activate the secondary cell.

[0062] First, the starting time domain position of the reference signal is described.

[0063] In some embodiments, the terminal determines the starting time domain position of the reference signal based on the time domain position of sending the reference signal activation signal, and starts receiving the reference signal at the starting time domain position of the reference signal.

[0064] The reference signal activation signaling includes two cases: MAC CE or DCI. Then, determining the starting time domain position of the reference signal also includes the following two cases:

[0065] (1) If the reference signal activation signaling is a MAC CE, the starting time domain position of the reference signal is a time domain position corresponding to the first preset time length after the moment when the MAC CE is sent.

[0066] If the network device sends a MAC CE to the terminal, and the terminal receives the MAC CE and determines the time domain position of sending the MAC CE, and then determines the starting time domain position of the reference signal based on the time domain position of the MAC CE, the network device sends the reference signal at the starting time domain position of the reference signal, and the terminal receives the reference signal at the starting time domain position.

[0067] Among them, when the terminal receives the MAC CE, it needs to process the MAC CE and obtain the information included in the MAC CE. The terminal's processing of the MAC CE requires a first preset time length, so the reference signal is received at the time domain position corresponding to the first preset time length after the moment of sending the MAC CE.

[0068] The first preset duration is set by the network device, or by an operator, or by other methods. For example, the first preset duration is 40 milliseconds, 50 milliseconds, or other values.

[0069] In a possible implementation, the first preset duration is represented by a time unit, for example, the first preset duration is T time units, T is an integer, the time unit is a symbol or the time unit is a time slot.

[0070] Alternatively, the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment of sending the confirmation message of the MAC CE.

[0071] The confirmation message is a HARQ-ACK message. The terminal receives the MAC CE, parses the MAC CE, and needs to return a confirmation message of the MAC CE to the network device, so the time domain position corresponding to the second preset time length after the terminal sends the confirmation message of the MAC CE is determined to be the starting time domain position of the reference signal.

[0072] The second preset duration is set by the network device, or by an operator, or by other methods. For example, the second preset duration is 20 milliseconds, 30 milliseconds, or other values.

[0073] (2) If the reference signal activation signaling is DCI, the starting time domain position of the reference signal is the time domain position corresponding to the third preset duration after the moment when the DCI is sent.

[0074] If the network device sends DCI to the terminal, and the terminal determines the starting time domain position of the reference signal based on the time domain position of the DCI, the network device starts sending the reference signal at the starting time domain position, and the terminal starts receiving the reference signal at the starting time domain position.

[0075] After the terminal receives the DCI, it needs to process the DCI to obtain the information included in the DCI. The terminal needs a certain amount of time to process the DCI. Therefore, the terminal can receive the reference signal at the time domain position corresponding to the third preset time length after the moment of sending the DCI.

[0076] The third preset duration is determined by the following formula:

[0077] T proc =N 1 (2048+144) k 2 -μ ·T c ;

[0078] Among them, T proc The third preset duration, k and T c is a constant, u=0,1,2,3,N 1 is the PDSCH processing time, the N 1 Set by the network device, or by the operator, or by other means. For example, k is 64, T c It is 1 / 1966080000.

[0079] In a possible implementation, the third preset duration is represented by a time unit, for example, the third preset duration is N time units, where N is an integer.

[0080] In addition, if the frequency range to which the secondary cell belongs is FR2 (referring to a frequency range, for example, 24250 MHz-52600 MHz), the interval between the time domain position of the DCI and the starting time domain position of the reference signal is not less than the third preset duration.

[0081] In an embodiment of the present application, DCI is used as a reference signal activation signaling, and the starting time domain position of the reference signal can be determined based on the time domain position of sending the DCI. Since the terminal can complete the processing of the DCI, there is no need to increase the processing speed of the terminal, which reduces the complexity of the terminal and improves the processing rate of the reference signal.

[0082] In other embodiments, on the basis of determining the starting time domain position of the reference signal according to the reference signal activation signaling, it is also necessary to ensure that the starting time domain position of the reference signal overlaps with the time domain position of the SSB of the activated carrier.

[0083] In an embodiment of the present application, multiple carriers are aggregated through carrier aggregation technology, so that the network equipment can activate different carriers and send or receive different information on different carriers. If the starting frequency domain position of the reference signal overlaps with the time domain position of the SSB (Synchronization Signal Block) of the activated carrier, the terminal can detect the reference signal and SSB at the overlapping time domain position, and can consider multiple carriers at the same time, thereby improving the efficiency of the terminal in receiving information.

[0084] For example, the starting time domain position of the reference signal is in the same time slot as the SSB, and the symbol where the reference signal is located is a subset or a full set of the symbol where the SSB is located.

[0085] In some other embodiments, the starting time domain position of the reference signal is determined according to the state of the carrier corresponding to the secondary cell.

[0086] In the embodiment of the present application, since the states of the carrier corresponding to the secondary cell include multiple states, the manners for determining the starting time domain position of the reference signal are different in different states.

[0087] The state of the carrier corresponding to the secondary cell is determined according to at least one of a secondary cell measurement period, a frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0088] 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. The frequency range to which the secondary cell belongs is FR1 (referring to a frequency range, for example, 450MHz-6000MHz), then the state of the carrier corresponding to the secondary cell is determined to be state 2, or other states can also be determined.

[0089] Exemplarily, the embodiment of the present application includes 9 carrier states. The 9 carrier states are shown in Table 1:

[0090] Table 1

[0091]

[0092]

[0093] Based on the 9 states in Table 1, if the state of the secondary cell is determined to be any one of state 2, state 3, state 6, state 7, state 8 or state 9, the starting time domain position of the determined reference signal is not only related to the time domain position of the reference signal activation signaling, but also needs to ensure overlap with the time domain position of the SSB.

[0094] If it is determined that the state of the secondary cell is any one of state 1 or state 4, the determined starting time domain position of the reference signal is related to the time domain position of the reference signal activation signaling.

[0095] If it is determined that the state of the secondary cell is state 5, it is not necessary to determine the starting time domain position of the reference signal.

[0096] The first point that needs to be explained is that the terminal and the network device in the embodiment of the present application will use the above method to determine the starting time domain position of the reference signal.

[0097] The second point to be explained is that the embodiment of the present application is only described by taking the example of the terminal determining the starting time domain position of the reference signal according to the time domain position of the reference signal activation signaling. In another embodiment, the starting time domain position of the reference signal can also be indicated by the network device, without the need for the terminal to determine it based on the time domain position of the reference signal activation signaling.

[0098] In the above embodiment, how to determine the starting time domain position of the reference signal is described. Next, how to determine the time domain length of the reference signal will be described.

[0099] In the embodiment of the present application, the time domain length of the reference signal can be determined in the following three ways:

[0100] (1) The time domain length of the reference signal is determined according to the state of the carrier.

[0101] (2) The time domain length of the reference signal is indicated by the reference signal configuration signaling sent by the network device.

[0102] (3) The time domain length of the reference signal is a preset length.

[0103] The time domain length of the 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, or the reference signal occupies 6 time domain positions, or the reference signal occupies other number of time domain positions.

[0104] The time domain length of the reference signal is represented by the number of time domain units, or the time domain length of the reference signal is represented by the number of repeated transmissions of the reference signal.

[0105] For example, if 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. If the time domain length of the reference signal is represented by time slots, the number of time domain positions occupied by the reference signal is twice the number of time slots. If 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.

[0106] It should be noted that the embodiments of the present application only use the number of repeated transmissions or the number of time domain units to represent the time domain length of the reference signal as an example. In the present application, it is not limited to the above-mentioned method, and other methods can also be used to represent the time domain length of the reference signal.

[0107] When the time domain length of the reference signal is determined by method (1), for the time-frequency synchronization function, multiple time domain positions of the reference signal are required, and the time-frequency synchronization is achieved based on the difference between the multiple time domain positions. Alternatively, for the frequency gain control function, the frequency gain control can be completed if the reference signal is one symbol, and the frequency gain control can also be completed if the reference signal is multiple symbols. According to the above method, the time domain length of the reference signal can be determined according to the state of the carrier of different secondary cells.

[0108] Next, based on the 9 states shown in Table 1 above, the time domain length of the reference signal as shown in Table 2 can be determined:

[0109] Table 2

[0110]

[0111]

[0112] When determining the time domain length of the reference signal through method (2), the terminal does not need to determine the time domain length of the reference signal based on the state of the carrier of the secondary cell. The network device can send 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.

[0113] When the time domain length of the reference signal is determined by method (3), the time domain length of the reference signal determined by the terminal is a preset length.

[0114] The preset length is set by the network device, or by an operator, or by other means. The above preset length is only an example, and may be other values ​​in actual applications.

[0115] In an embodiment of the present application, regardless of the state of the carrier of the secondary cell, the time domain length of the reference signal is determined to be a preset length, which reduces the operation of the terminal determining the time domain length of the reference signal and improves the efficiency of determining the time domain length of the reference signal.

[0116] Next, how to determine the time domain position of the reference signal will be described.

[0117] 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 according to at least one of the secondary cell measurement period, the frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0118] If the state of the carrier corresponding to the secondary cell is to complete time domain synchronization according to the reference signal, it is determined that there is a gap 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. If the state of the carrier is to complete 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.

[0119] In addition, due to different carrier states, the terminal's dependence on the reference signal is also different. Therefore, for different carrier states, the number of time domain positions and the interval of the time domain positions of the reference signal are also different.

[0120] For example, in 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.

[0121] For state 2, the terminal completes time domain synchronization and frequency gain control according to the reference signal. In order to reduce the delay and avoid repeated frequency gain control settings, the reference signal used for frequency gain control is adjacent to the reference signal used for time-frequency synchronization, and there is a gap between the time domain positions of the reference signals used for time-frequency synchronization.

[0122] For state 3, the terminal completes time domain synchronization and frequency gain control according to the reference signal, and the frequency gain control needs to be set multiple times, so multiple reference signals are required. The multiple reference signals used for frequency gain control are adjacent, and there are intervals between the multiple reference signals used for time-frequency synchronization.

[0123] For state 4, 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.

[0124] For state 5, the terminal does not need to receive a reference signal.

[0125] For state 6, the terminal completes time domain synchronization and frequency gain control according to the reference signal. In order to reduce the delay and avoid repeated frequency gain control settings, the reference signal used for frequency gain control is adjacent to the reference signal used for time-frequency synchronization, and there is a gap between the time domain positions of the reference signals used for time-frequency synchronization.

[0126] For state 7, the terminal completes time domain synchronization and frequency gain control according to the reference signal. In order to reduce the delay and avoid repeated frequency gain control settings, the reference signal used for frequency gain control is adjacent to the reference signal used for time-frequency synchronization, and there is a gap between the time domain positions of the reference signals used for time-frequency synchronization.

[0127] For state 8, for the same beam (signals have a QCL Type D relationship), the same as state 3. Multiple beams are repeatedly mapped on different symbols. There is a certain interval between different beams to meet the beam switching time.

[0128] For state 9, for the same beam (signals have a QCL Type D relationship), the same as state 3. Multiple beams are repeatedly mapped on different symbols. There is a certain interval between different beams to meet the beam switching time.

[0129] For example, taking the state in Table 1, the reference signal is TRS as an example for explanation, Table 3 shows the time domain position corresponding to each state of the reference signal, and the value of x is 5:

[0130] Table 3

[0131] Status Number First row TRS Second row TRS The third row TRS Fourth row 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

[0132] In some other embodiments, the time domain position of the reference signal is the time slot occupied by the reference signal and / or a preset position in the time slot.

[0133] In the embodiment of the present application, if the carriers corresponding to the secondary cell all meet the above conditions, the existing format of the 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 position of the reference signal occupies the 5th symbol and the 9th symbol in the time slot, and the value of x is 5.

[0134] Table 4

[0135]

[0136] If the initial time domain position of the reference signal does not overlap with the time domain position of the SSB of the activated carrier, the initial time domain position of the reference signal is offset, and the time domain position of the offset reference signal overlaps with the time domain position of the SSB.

[0137] In some other embodiments, the reference signal and the SSB or CSI RS are quasi co-located, and measurements related to the SSB or CSI can be performed based on the reference signal.

[0138] Among them, there are four types of quasi-co-location relationships, namely type A quasi-co-location relationship, type B quasi-co-location relationship, type C quasi-co-location relationship and type D quasi-co-location relationship.

[0139] The quasi-co-location relationship of type A has the characteristics of Doppler frequency shift, Doppler spread, average delay and delay spread, the quasi-co-location relationship of type B has the characteristics of Doppler frequency shift and Doppler spread, the quasi-co-location relationship of type C has the characteristics of Doppler frequency shift and average delay, and the quasi-co-location relationship of type D has the characteristics of spatial reception parameters.

[0140] (1) If the reference signal and SSB have a quasi-co-location relationship, SSB is detected based on the reference signal.

[0141] Among them, the reference signal and the SSB have a quasi-co-location relationship of type C, or a quasi-co-location relationship of type C and type D.

[0142] (2) If the reference signal has a quasi-co-location relationship with a channel state indication reference signal CSI RS used for channel state indication CSI measurement, CSI measurement is performed according to the reference signal.

[0143] The reference signal and the CSI RS have a type A quasi co-location relationship, or a type B quasi co-location relationship, or a type A and type D quasi co-location relationship.

[0144] It should be noted that the embodiment of the present application is only described by taking the reference signal and the SSB or CSI measurement having a quasi-co-location relationship as an example. In another embodiment, the reference signal and the SSB or CSI do not have a quasi-co-location relationship, and the reference signal received by the terminal is only used for frequency gain control or for time-frequency synchronization.

[0145] According to the method provided in the embodiment of the present application, the terminal can receive the reference signal based on the reference signal activation signaling, and then activate the secondary cell. There is no need to wait for receiving the first SSB and then activate the secondary cell, which reduces the waiting time for receiving the first SSB, thereby reducing the delay in activating the secondary cell and improving the accuracy of activating the secondary cell.

[0146] Furthermore, the terminal activates the secondary cell according to the received reference signal, and no longer needs to parse the SSB, thereby reducing the processing resources consumed during the parsing process, thereby saving terminal resources.

[0147] 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 defined respectively, thereby ensuring that the reference signal can activate the secondary cell in any scenario, thereby improving the efficiency of activating the secondary cell.

[0148] Furthermore, the time domain length of the reference signal can be determined in a variety of ways, which improves the flexibility of determining the reference signal and further improves the flexibility of activating the secondary cell.

[0149] Figure 4 A block diagram of a secondary cell activation device provided by an exemplary embodiment of the present application is shown, and the device is applied to a terminal, and the device includes:

[0150] A receiving module 401 is configured to receive a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, and the reference signal is used to activate a secondary cell;

[0151] The receiving module 401 is configured to receive a reference signal based on the reference signal activation signaling;

[0152] The activation module 402 is configured to activate the secondary cell.

[0153] The device provided in the embodiment of the present application enables the terminal to receive the reference signal based on the reference signal activation signaling, and then activate the secondary cell. There is no need to wait for receiving the first SSB and then activate the secondary cell, which reduces the waiting time for receiving the first SSB, thereby reducing the delay in activating the secondary cell and improving the accuracy of activating the secondary cell.

[0154] In some embodiments, the reference signal activation signaling is any one of MAC CE or DCI.

[0155] In some embodiments, the reference signal activation signaling is a MAC CE, and the starting time domain position of the reference signal is a time domain position corresponding to a first preset time length after the moment of sending the MAC CE; or, the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment of sending a confirmation message of the MAC CE.

[0156] In some embodiments, the reference signal activation signaling is DCI, and the starting time domain position of the reference signal is a time domain position corresponding to a third preset duration after the moment of sending the DCI.

[0157] In some embodiments, the third preset duration is determined using the following formula:

[0158] T proc =N1 (2048+144) k 2 -μ ·T c

[0159] Among them, T proc is the third preset duration, k and Tc are constants, u=0, 1, 2, 3, and N1 is the PDSCH processing time.

[0160] In some embodiments, the starting time domain position of the reference signal overlaps with the time domain position of the SSB of the activated carrier.

[0161] 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.

[0162] 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, or the time domain length of the reference signal is indicated by the reference signal configuration signaling sent by the network device, or the time domain length of the reference signal is a preset length.

[0163] In some embodiments, the time domain length of the reference signal is represented by the number of time domain units, or the time domain length of the reference signal is represented by the number of repeated transmissions of the reference signal.

[0164] In some embodiments, the time domain unit is a symbol, or the time domain unit is a time slot.

[0165] 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.

[0166] In some embodiments, the time domain position of the reference signal is a time slot occupied by the reference signal and / or a preset position in a time slot.

[0167] In some embodiments, see Figure 5 , the device further comprises:

[0168] The offset module 403 is used to offset the 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 activated carrier, so that the time domain position of the reference signal after the offset overlaps with the time domain position of the SSB of the activated carrier.

[0169] In some embodiments, the state of the carrier corresponding to the secondary cell is determined according to at least one of a secondary cell measurement period, a frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0170] In some embodiments, the reference signal is a tracking reference signal TRS.

[0171] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0172] The activation module 402 or the shift module 403 may also 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.

[0173] Figure 6 A block diagram of a secondary cell activation device provided by an exemplary embodiment of the present application is shown, and the device is applied to a network device, and the device includes:

[0174] A sending module 601 is used to send a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, and the reference signal is used for secondary cell activation;

[0175] The sending module 601 is configured to send a reference signal based on the reference signal activation signaling.

[0176] The device provided in the embodiment of the present application enables the terminal to receive the reference signal based on the reference signal activation signaling, and then activate the secondary cell. There is no need to wait for receiving the first SSB and then activate the secondary cell, which reduces the waiting time for receiving the first SSB, thereby reducing the delay in activating the secondary cell and improving the accuracy of activating the secondary cell.

[0177] In some embodiments, the reference signal activation signaling is any one of MAC CE or DCI.

[0178] In some embodiments, the reference signal activation signaling is a MAC CE, and the starting time domain position of the reference signal is a time domain position corresponding to a first preset time length after the moment of sending the MAC CE; or, the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment of sending a confirmation message of the MAC CE.

[0179] In some embodiments, the reference signal activation signaling is DCI, and the starting time domain position is a time domain position corresponding to a third preset duration after the moment of sending the DCI.

[0180] In some embodiments, the third preset duration is determined using the following formula:

[0181] T proc =N 1 (2048+144) k 2 -μ ·T c

[0182] Among them, T proc The third preset duration, k and T cis a constant, u=0, 1, 2, 3, and N1 is the PDSCH processing time.

[0183] In some embodiments, the starting time domain position of the reference signal overlaps with the time domain position of the SSB of the activated carrier.

[0184] 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.

[0185] 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, or the time domain length of the reference signal is indicated by the reference signal configuration signaling sent by the network device, or the time domain length of the reference signal is a preset length.

[0186] In some embodiments, the time domain length of the reference signal is represented by the number of time domain units, or the time domain length of the reference signal is represented by the number of repeated transmissions of the reference signal.

[0187] In some embodiments, the time domain unit is a symbol, or the time domain unit is a time slot.

[0188] 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.

[0189] In some embodiments, the time domain position of the reference signal is a time slot occupied by the reference signal and / or a preset position in a time slot.

[0190] In some embodiments, see Figure 7 , the device further comprises:

[0191] The offset module 602 is used to offset the 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 activated carrier, so that the time domain position of the reference signal after the offset overlaps with the time domain position of the SSB of the activated carrier.

[0192] In some embodiments, the state of the carrier corresponding to the secondary cell is determined according to at least one of a secondary cell measurement period, a frequency range to which the secondary cell belongs, or whether the secondary cell is known.

[0193] In some embodiments, the reference signal is a tracking reference signal TRS.

[0194] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0195] The above-mentioned offset module 602 may also be a processing module, and may be a processor in a specific implementation. The above-mentioned sending module 601 may be a transmitter or a transceiver in a specific implementation.

[0196] Figure 8 A schematic diagram of the structure of a communication device provided by an exemplary embodiment of the present application is shown. The communication device includes: a processor 801, a receiver 802, a transmitter 803, a memory 804 and a bus 805.

[0197] The processor 801 includes one or more processing cores. The processor 801 executes various functional applications and information processing by running software programs and modules.

[0198] The receiver 802 and the transmitter 803 may be implemented as one communication component.

[0199] The memory 804 is connected to the processor 801 via a bus 805 .

[0200] The memory 804 may be used to store at least one program code, and the processor 801 may be used to execute the at least one program code so that the communication device implements each step in the above method embodiment.

[0201] In addition, 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 magnetic disk or optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[0202] In an exemplary embodiment, a computer-readable storage medium is further provided, wherein an executable program code is stored in the computer-readable storage medium, and the executable program code is loaded and executed by the processor to implement the secondary cell activation method performed by the communication device provided by each of the above method embodiments.

[0203] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0204] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for activating a secondary cell, characterized in that: Applied to a terminal, the method comprises: receiving a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, where the reference signal is used for secondary cell activation; receiving the reference signal based on the reference signal activation signaling, and activating the secondary cell; The time domain length of the reference signal is indicated by the reference signal configuration signaling sent 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.

2. The method according to claim 1, characterized in that: The reference signal activation signaling is MAC CE, and the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment of sending a confirmation message of the MAC CE.

3. The method according to claim 1 or 2, characterized in that: The reference signal is a tracking reference signal TRS.

4. A method for activating a secondary cell, characterized in that: Applied to a network device, the method comprises: Sending a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, where the reference signal is used for secondary cell activation; Sending the reference signal based on the reference signal activation signaling; The time domain length of the reference signal is indicated by the reference signal configuration signaling sent 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.

5. The method according to claim 4, characterized in that The reference signal activation signaling is a MAC CE, and the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment when the terminal sends a confirmation message of the MAC CE.

6. The method according to claim 4 or 5, characterized in that: The reference signal is a tracking reference signal TRS.

7. A secondary cell activation device, characterized in that: Applied to a terminal, the device comprises: A receiving module, configured to receive a reference signal activation signaling, where the reference signal activation signaling is used to activate a reference signal, where the reference signal is used to activate a secondary cell; The receiving module is configured to receive the reference signal based on the reference signal activation signaling; An activation module, used for activating the secondary cell; The time domain length of the reference signal is indicated by the reference signal configuration signaling sent 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.

8. The device according to claim 7, characterized in that The reference signal activation signaling is MAC CE, and the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment of sending a confirmation message of the MAC CE.

9. A secondary cell activation device, characterized in that: Applied to network equipment, the device comprises: A sending module, used for sending a reference signal activation signaling, where the reference signal activation signaling is used for activating a reference signal, where the reference signal is used for secondary cell activation; The sending module is configured to send the reference signal based on the reference signal activation signaling; The time domain length of the reference signal is indicated by the reference signal configuration signaling sent 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.

10. The device according to claim 9, characterized in that The reference signal activation signaling is a MAC CE, and the starting time domain position of the reference signal is a time domain position corresponding to a second preset time length after the moment when the terminal sends a confirmation message of the MAC CE.

11. A computer-readable storage medium, characterized in that: The readable storage medium stores executable program codes, and the executable program codes are loaded and executed by a processor to implement the secondary cell activation method according to any one of claims 1 to 6.

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