Secondary cell activation method and communication device

Abstract

Provided are a secondary cell activation method and a communication device, the method comprising: a terminal device receiving first information from a network device, the first information indicating an initial position of a first reference signal burst of a secondary cell in a frame and an interval between two adjacent reference signal bursts; the terminal equipment receives the reference signal burst # i of the auxiliary cell, and determines an index value of the reference signal burst # i based on the receiving time of the reference signal burst # i and the interval between two adjacent reference signal bursts; and performing cell search based on the index value of the reference signal burst # i, the initial position of the first reference signal burst in the frame and the interval between two adjacent reference signal bursts. Through the method, the period of the reference signal burst is determined according to the interval of the reference signal burst indicated by the first information, so that the flexibility of the period of the reference signal burst is improved, and the time delay of activating the secondary cell by the terminal equipment is shortened.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a secondary cell activation method and a communication device. Background Art

[0002] After the secondary cell (SCell) is configured, the terminal device needs to activate the SCell according to the instructions of the network device before it can transmit signals through the resources of the secondary cell. The process of activating the SCell includes the process of determining the transmit and receive beam pair for communication between the terminal device and the SCell, which is based on the synchronization signal and physical broadcast channel block (SSB). In this process, the terminal device needs to perform two automatic gain control settling (AGC settling), one cell search (cell search) and one layer 1 reference signal received power measurement (layer 1reference signal received power measurement, L1-RSRP measurement) in each receiving beam direction.

[0003] Usually, during the activation process, the transmission period of SSB is 20ms, and the terminal device can perform 2 AGC settlings or 1 cell search or 1 L1-RSRP measurement for 1 receiving beam in each SSB transmission period. That is to say, when the terminal device has 8 receiving beams, the terminal device needs to go through 32 (i.e. 4 times the number of receiving beams) SSB periods, i.e. 640ms, during the activation of SCell, perform 2 AGC settlings, 1 cell search and 1 L1-RSRP measurement. It can be seen that a large delay will be generated in the process of activating SCell. Summary of the invention

[0004] The embodiments of the present application provide a secondary cell activation method and a communication device, which are beneficial to improving the flexibility of the reference signal burst period, thereby facilitating reducing the delay of terminal equipment in activating the secondary cell.

[0005] In the first aspect, the present application provides a secondary cell activation method. Taking the execution of the method by a terminal device as an example, the method includes: the terminal device receives first information from a network device, and the first information indicates a starting position of a first reference signal burst of the secondary cell in the frame and an interval between two adjacent reference signal bursts; the terminal device receives a reference signal burst #i of the secondary cell, and the reference signal burst #i is one of the reference signal bursts indicated by the first information, or it is understood that the reference signal burst #i is one of the reference signal bursts determined according to the first information; further, the terminal device determines an index value of the reference signal burst #i based on the reception time of the reference signal burst #i and the interval between two adjacent reference signal bursts; and performs a cell search based on the index value of the reference signal burst #i, the starting position of the first reference signal burst in the frame, and the interval between two adjacent reference signal bursts.

[0006] In the method described in the first aspect, the first information affects the period of the reference signal burst by indicating the interval between two adjacent reference signal bursts, thereby improving the flexibility of the period of the reference signal burst. The method of activating the secondary cell based on the flexible periodic reception of the reference signal burst (including the steps of setting the automatic gain control or performing the cell search or measuring the layer 1 reference signal receiving power) is beneficial to reducing the delay of the terminal device in activating the secondary cell compared to the method of activating the secondary cell according to the fixed periodic reception of the SSB. Moreover, in the scheme provided in the present application, the terminal device determines the index value of the reference signal burst based on the reception time of the reference signal burst, and there is no need to carry the frame indication information and the index value of the reference signal burst in the reference signal burst. Compared with the structure of the SSB including the synchronization signal and the channel for carrying the frame indication information and the SSB index, it is also beneficial to save overhead.

[0007] In one possible implementation, the terminal device determines multiple time ranges based on the subcarrier spacing of the secondary cell, the reception time difference between the primary cell and the secondary cell, and the interval between two adjacent reference signal bursts, and different time ranges in the multiple time ranges correspond to different index values; further, the terminal device determines the index value corresponding to the time range #i as the index value of the reference signal burst #i, and the time range #i is the time range in which the reception time of the reference signal burst #i is located in the multiple time ranges.

[0008] In a possible implementation, the interval between two adjacent reference signal bursts is greater than or equal to Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the subcarrier spacing SCS of the secondary cell satisfies SCS=15kHz·2 μ , where ΔT is the reception time difference between the primary cell and the secondary cell.

[0009] In one possible implementation, when the time-frequency resources of the physical downlink control channel PDCCH overlap with the time-frequency resources of the reference signal burst #j in the first symbol, the terminal device does not expect to receive the reference signal burst #j in the first symbol, and the reference signal burst #j is one of the reference signal bursts indicated by the first information; or, when the time-frequency resources of the physical downlink shared channel PDSCH overlap with the time-frequency resources of the reference signal burst #j in the second symbol, the terminal device receives the reference signal burst #j in the second symbol; or, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of the reference signal burst #j in the third symbol, the terminal device receives the reference signal burst #j in the third symbol, and the first reference signal is the channel state information reference signal CSI-RS or the demodulation reference signal DMRS.

[0010] In the second aspect, the present application provides a secondary cell activation method, taking the network device executing the method as an example, the method includes: the network device sends a first information to the terminal device, the first information indicating the starting position of the first reference signal burst of the secondary cell in the frame and the interval between two adjacent reference signal bursts; wherein the interval between two adjacent reference signal bursts is greater than or equal to Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the subcarrier spacing SCS of the secondary cell satisfies SCS=15kHz·2 μ , ΔT is the reception time difference between the primary cell and the secondary cell; the network device sends a reference signal burst of the secondary cell to the terminal device based on the starting position of the first reference signal burst in the frame and the interval between two adjacent reference signal bursts, and the reference signal burst of the secondary cell includes the first reference signal burst.

[0011] In the method described in the second aspect, the network device flexibly determines the interval of the reference signal burst through the subcarrier spacing of the secondary cell and the reception time difference between the primary cell and the secondary cell, thereby improving the flexibility of the reference signal burst set. The method of activating the secondary cell (including the steps of setting automatic gain control or performing cell search or measuring the layer 1 reference signal reception power) according to the flexible periodic reception of the reference signal burst is beneficial to reducing the delay of the terminal device in activating the secondary cell compared to the method of activating the secondary cell according to the fixed periodic reception of the SSB. Moreover, in the scheme provided in the present application, the index value of the reference signal burst can be determined based on the reception time of the reference signal burst, and there is no need to carry the frame indication information and the index value of the reference signal burst in the reference signal burst. Compared with the structure of the SSB including the synchronization signal and the channel for carrying the frame indication information and the SSB index, it is also beneficial to save overhead.

[0012] In one possible implementation, when the time-frequency resources of a physical downlink control channel PDCCH overlap with the time-frequency resources of a reference signal burst #j in the first symbol, the network device sends PDCCH in the first symbol, and does not send reference signal burst #j in the first symbol, and the reference signal burst #j is one of the reference signal bursts indicated by the first information; or, when the time-frequency resources of a physical downlink shared channel PDSCH overlap with the time-frequency resources of a reference signal burst #j in the second symbol, the network device sends reference signal burst #j in the second symbol, and does not send PDSCH in the second symbol; or, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of a reference signal burst #j in the third symbol, the network device sends reference signal burst #j in the third symbol, and does not send the first reference signal in the third symbol, and the first reference signal is a channel state information reference signal CSI-RS or a demodulation reference signal DMRS.

[0013] In a third aspect, the present application provides a communication device, which may be a terminal device, or a device in a terminal device, or a device that can be used in combination with a terminal device. The communication device may also be a chip system. The communication device may execute the method described in the first aspect. The functions of the communication device may be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more units or modules corresponding to the above functions. The unit or module may be software and / or hardware. The operations and beneficial effects performed by the communication device may refer to the method and beneficial effects described in the first aspect above.

[0014] In a fourth aspect, the present application provides a communication device, which may be a network device, or a device in a network device, or a device that can be used in combination with a network device. The communication device may also be a chip system. The communication device may execute the method described in the second aspect. The functions of the communication device may be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more units or modules corresponding to the above functions. The unit or module may be software and / or hardware. The operations and beneficial effects performed by the communication device may refer to the method and beneficial effects described in the second aspect above.

[0015] In a fifth aspect, the present application provides a communication device, comprising a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method described in the first aspect through a logic circuit or by executing code instructions, or the processor is used to implement the method described in the second aspect through a logic circuit or by executing code instructions.

[0016] In a sixth aspect, the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is executed by a communication device, the method described in the first aspect is implemented, or the method described in the second aspect is implemented.

[0017] In a seventh aspect, the present application provides a computer program product comprising instructions, which, when a communication device reads and executes the instructions, causes the communication device to execute the method as described in the first aspect, or causes the communication device to execute the method as described in the second aspect.

[0018] In an eighth aspect, the present application provides a communication system, comprising a communication device for executing the method described in the first aspect above, and a communication device for executing the method executed by the network device described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of carrier aggregation provided in an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of a beam management process provided by an embodiment of the present application;

[0022] Figure 4 It is a flowchart of a method for activating a secondary cell provided in an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of a reference signal burst pattern provided in an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of another reference signal burst pattern provided in an embodiment of the present application;

[0025] Figure 7 is a schematic diagram of another reference signal burst pattern provided in an embodiment of the present application;

[0026] Figure 8 is a schematic diagram of another reference signal burst pattern provided in an embodiment of the present application;

[0027] Fig. 9 is a schematic diagram of a corresponding relationship between a time range and an index value provided in an embodiment of the present application;

[0028] Fig.10is a structural diagram of a communication device provided in an embodiment of the present application;

[0029] Fig.11 It is a structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to facilitate a specific understanding of the embodiments of the present application, the system architecture involved in the embodiments of the present application is first introduced below.

[0031] Figure 1 FIG. 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. Figure 1 As shown, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The RAN 100 includes at least one RAN node (such as Figure 1 110a and 110b in the figure, collectively referred to as 110), and may also include at least one terminal (such as Figure 1 RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment ( Figure 1 (not shown in the figure). The terminal 120 is connected to the RAN node 110 by wireless means, and the RAN node 110 is connected to the core network 200 by wireless or wired means. The core network device in the core network 200 and the RAN node 110 in the RAN 100 can be independent and different physical devices, or the same physical device that integrates the logical functions of the core network device and the logical functions of the RAN node. Terminals and terminals and RAN nodes and RAN nodes can be connected to each other by wire or wireless means. It should be noted that the RAN node 110 may also be referred to as the network device 110 in the following text.

[0032] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, and a future radio access system defined in the 3rd generation partnership project (3GPP). RAN100 may also include two or more of the above-mentioned different radio access systems. RAN100 may also be an open RAN (O-RAN).

[0033] RAN nodes, also known as radio access network equipment, RAN entities or access nodes, are used to help terminals access the communication system wirelessly. In one application scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a next generation NodeB in a sixth generation (6G) mobile communication system, or a base station in a future mobile communication system. A RAN node can be a macro base station (such as a Figure 1 110a), or a micro base station or an indoor station (such as Figure 1 110b) in the figure, it can also be a relay node or a donor node.

[0034] In another application scenario, the cooperation of multiple RAN nodes can be used to help the terminal achieve wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU) or a radio unit (RU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete the functions of part of the physical layer or all of the physical layer. For the specific description of the above-mentioned various protocol layers, please refer to the relevant technical specifications of 3GPP. RU can be used to implement the transceiver function of radio frequency signals. CU and DU can be two independent RAN nodes, or they can be integrated in the same RAN node, such as integrated in a baseband unit (BBU). RU can be included in a radio frequency device, such as a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0035] In different systems, RAN nodes may have different names. For example, in an O-RAN system, CU may be called an open CU (open CU, O-CU), DU may be called an open DU (open DU, O-DU), and RU may be called an open RU (open RU, O-RU). The RAN node in the embodiment of the present application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. For example, the RAN node may be a server loaded with a corresponding software module. The embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN node. For the convenience of description, the following description takes a base station as an example of a RAN node.

[0036] A terminal is a device with wireless transceiver function, which can send signals to a base station or receive signals from a base station. A terminal can also be called a terminal device, user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

[0037] Base stations and terminals can be fixed or movable. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0038] The roles of the base station and the terminal can be relative, for example, Figure 1The helicopter or drone 120i in the figure can be configured as a mobile base station. For the terminal 120j that accesses the wireless access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, base stations and terminals can be collectively referred to as communication devices. Figure 1 110a and 110b in the figure may be referred to as communication devices having base station functions. Figure 1 120a-120j in the figure can be called communication devices with terminal functions.

[0039] Base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both; they can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0040] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem including the base station function. The control subsystem including the base station function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device including the terminal function.

[0041] In this application, the base station sends a downlink signal or downlink information to the terminal, and the downlink information is carried on the downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection with the cell controlled by the base station. The cell with which the terminal has established a wireless connection is called the service cell of the terminal. When the terminal communicates with the service cell, it will also be interfered by signals from neighboring cells.

[0042] In the embodiments of the present application, the time domain symbol may be an orthogonal frequency division multiplexing (OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol. Unless otherwise specified, the symbols in the embodiments of the present application refer to time domain symbols.

[0043] It can be understood that in the embodiments of the present application, PDSCH, PDCCH and PUSCH are merely examples of downlink data channels, downlink control channels and uplink data channels, respectively. In different systems and different scenarios, data channels and control channels may have different names, and the embodiments of the present application do not limit this.

[0044] In order to facilitate understanding of the relevant contents of the embodiments of the present application, some of the terms involved in the embodiments of the present application are explained below. This part is only for ease of understanding and cannot be regarded as a disclosure or specific limitation of the technical solution of the present application.

[0045] 1. Beam

[0046] The embodiment of beam in NR protocol can be spatial filter or spatial parameters. The beam used to send signals can be called transmission beam (Txbeam), or spatial transmission filter or spatial transmission parameter; the beam used to receive signals can be called reception beam (Rx beam), or spatial reception filter or spatial reception parameter.

[0047] The transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.

[0048] It should be understood that the embodiment of beams in the NR protocol listed above is only an example and should not constitute any limitation to this application. This application does not exclude the possibility of defining other terms in other protocols to express the same or similar meanings.

[0049] In addition, the beam may be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam may be a beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology. Different beams may be considered to correspond to different resources. The same information or different information may be sent through different beams.

[0050] Optionally, multiple beams with the same or similar communication characteristics are regarded as one beam. One beam may include one or more antenna ports for transmitting data, control signaling or detection signals, etc. One or more antenna ports forming a beam may also be regarded as an antenna port set.

[0051] 2. Cell

[0052] A cell is a set of resources managed by a base station, including frequency domain resources and spatial domain resources. The frequency domain resources of a cell include uplink frequency domain resources and / or downlink frequency domain resources; the spatial domain resources of a cell can be the spatial domain resources corresponding to a beam or a group of beams, which can also be understood as a cell corresponding to a specific physical coverage area. In an embodiment of the present application, different cells can be managed by different base stations. For example, cell #1 and cell #2 can be managed by different base stations. In this case, it can be said that cell #1 and cell #2 do not share the same station. Cell #1 and cell #2 can also be managed by the same base station and have the same baseband processing unit and / or radio frequency processing unit. This application does not specifically limit this.

[0053] Depending on the frequency band range in which the cell is located (or understood to correspond to), the cell in the range of 450MHz-6000MHz can be called a cell in the frequency range (FR) 1 or a low-frequency cell, and the cell in the range of 24250MHz-52600MHz can be called a cell in FR2 or a high-frequency cell. It should be noted that there is a one-to-one correspondence between the cell and the carrier. In the absence of logical conflicts, the cell and the carrier can be used interchangeably. In other words, the frequency band range in which the cell is located can be understood as the frequency band range in which the frequency of the cell's corresponding carrier is located, and can also be called the working frequency band of the cell or the frequency band in which the cell is located.

[0054] 3. Carrier aggregation (CA)

[0055] See also Figure 2As shown in the figure, CA technology is a technology that aggregates two or more component carriers (CCs) to support a larger transmission bandwidth. In other words, CA technology can achieve frequency resource integration, aggregate spectrum resources of the same frequency band or different frequency bands for terminal devices to use, thereby improving the utilization rate of the entire network resources.

[0056] When CA is configured for a terminal device, the terminal device may have multiple service cells, including a primary cell (PCell) and at least one SCell. Among them, PCell is the cell where the terminal device and the network device perform initial connection establishment, or the cell where the terminal device performs radio resource control (RRC) connection reconstruction. PCell is responsible for radio resource control RRC communication with the terminal device, and the CC corresponding to PCell is called primary component carrier (PCC). SCell is added / modified / released through RRC connection reconfiguration message after the initial security activation procedure; SCell is used to provide additional radio resources, and there is no RRC communication between SCell and the terminal device.

[0057] 4. SCell activation

[0058] The NR protocol defines two states of SCell: activated state and deactivated state. When the SCell is in the activated state and the SCell is configured with a physical downlink control channel (PDCCH), the terminal device monitors the PDCCH of the SCell and transmits signals based on the network configuration and uplink and downlink scheduling information. When the SCell is in the deactivated state, the terminal device will not monitor or transmit any uplink and downlink signals in the SCell.

[0059] Usually, the network device provides the terminal device with the relevant configuration of the SCell through RRC signaling, and instructs the terminal device to add the SCell. At this time, the default state of the SCell is deactivated. In other words, the SCell cannot be used after configuration, and the SCell needs to be activated.

[0060] After the terminal device adds SCell, it mainly includes the following three processes:

[0061] 4.1 Process of receiving activation command

[0062] Specifically, the network device sends an activation command to the terminal device via a medium access control element (MAC CE); the terminal device sends HARQ feedback information to the network device, where the HARQ feedback information is used to indicate whether the activation command is successfully received.

[0063] 4.2 SCell Activation Process in FR2

[0064] Specifically, when the network device receives HARQ feedback information from the terminal device, and the HARQ feedback information indicates that the activation command is successfully received, the terminal device and the network device perform beam alignment. Figure 3 As shown, the activation process of the SCell in FR2 can be understood as a process of coarse beam alignment based on SSB to determine the network device's transmit beam and the terminal device's receive beam. Specifically, the network device sends SSB to the terminal device in multiple transmit beam directions, and the terminal device receives SSB from the network device in multiple receive beam directions; the terminal device performs AGCsettling, cell search, and L1-RSRP measurement based on the received SSB. Among them, AGC settling is used to determine the transmit power of the transmit beam; cell search is used to detect SSB to obtain synchronization information and determine frame boundaries; L1-RSRP measurement is used to determine the transmit beam range and the receive beam range. It should be noted that usually the terminal device needs to perform 2 AGC settlings, 1 cell search, and 1 L1-RSRP measurement in each receive beam direction.

[0065] 4.3 Channel state information reference signal (CSI-RS) measurement process.

[0066] Specifically, the network device sends CSI-RS to the terminal device through the SCell; the terminal device receives the CSI-RS and measures the CSI-RS to obtain a CSI report; the terminal device sends the CSI report to the network device. It should be understood that when the network device receives a valid CSI report of the SCell from the terminal device, the activation process of the SCell is deemed to be completed.

[0067] It can be seen that the delay caused by the process of activating the SCell in FR2 can include the following three parts of delay: the delay caused by the process of receiving the activation command, called T HARQ; The delay caused by the activation process is called T activation_time ; The delay caused by the CSI-RS measurement process is called T CSI_Reporting .

[0068] In order to shorten the delay of activating SCell, the present application provides a reference signal burst and a secondary cell activation method based on the reference signal burst. The reference signal burst is first described below.

[0069] The reference signal burst mentioned in the present application includes a signal for synchronization, and the present application does not limit the specific name of the reference signal burst. The signal for synchronization includes a primary synchronization signal (PSS) and / or a secondary synchronization signal (SSS); or, the signal for synchronization is a signal generated based on an m-sequence, for example, the signal for synchronization is a CSI-RS.

[0070] Based on the above-mentioned reference signal burst, the secondary cell activation method and communication device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings. Figure 4 FIG. 1 is a flow chart of a method for activating a secondary cell provided in an embodiment of the present application. Figure 4 As shown, the secondary cell activation method includes the following steps S401 to S404: Figure 4 The method execution subject shown is described by taking a terminal device and a network device as an example. It can be understood that Figure 4 The execution subject of the method shown may also be a module in a terminal device (for example, a chip) and a module in a network device (for example, a chip, or a CU, or a DU).

[0071] S401: A network device sends first information to a terminal device, where the first information indicates a starting position of a first reference signal burst of a secondary cell in a frame and an interval between two adjacent reference signal bursts. Correspondingly, the terminal device receives the first information from the network device.

[0072] Before the network device sends an activation command for activating the secondary cell to the terminal device, the network device sends RRC signaling to the terminal device through the RRC connection between the primary cell and the terminal device, where the RRC signaling carries the first information.

[0073] It should be understood that the interval between two adjacent reference signal bursts can be understood as the time unit between the end time of the previous reference signal burst and the start time of the next reference signal burst in the two adjacent reference signal bursts, and the time unit includes but is not limited to a time slot or a symbol.

[0074] In a possible implementation, the interval between the two adjacent reference signal bursts is determined according to the sub-carrier space (SCS) of the secondary cell and the reception time difference between the primary cell and the secondary cell. Exemplarily, the interval X between the two adjacent reference signal bursts satisfies the condition shown in formula (1).

[0075]

[0076] Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the SCS of the secondary cell satisfies SCS=15kHz·2 μ , ΔT is the reception time difference between the primary cell and the secondary cell. It should be noted that the reception time difference between the primary cell and the secondary cell mentioned in this application can also be called the frame timing difference between the primary cell and the secondary cell, that is, the timing deviation between frames with the same frame number between the primary cell and the secondary cell.

[0077] For example, when the reception time difference between the primary cell and the secondary cell is 25us, when the SCS of the secondary cell is 60kHz, the first information may indicate that the interval between the two adjacent reference signal bursts is 4 symbols; when the SCS of the secondary cell is 120kHz, the first information may indicate that the interval between the two adjacent reference signal bursts is 6 symbols; when the SCS of the secondary cell is 240kHz, the first information may indicate that the interval between the two adjacent reference signal bursts is 12 symbols.

[0078] It is also necessary to understand that the starting position of the first reference signal burst of the secondary cell in the frame includes the following aspects: ① The relative position of the time slot where the first reference signal burst is located in the corresponding frame (or understood as the frame), which can be understood as indicating the time slot number of the frame where the first reference signal burst is located. Among them, the relative position of the time slot where the first reference signal burst is located in the corresponding frame can be indicated by the first information, or it can be predefined by the communication protocol, and the present application does not make specific restrictions on this. ② The symbol position of the first reference signal burst in the time slot can be understood as indicating the symbol number of the first reference signal burst in the time slot. Among them, the symbol position of the first reference signal burst in the time slot can be indicated by the first information, or it can be determined by the terminal device according to the interval between two adjacent reference signal bursts, or it can be predefined by the communication protocol, and the present application does not make specific restrictions on this.

[0079] For example, in Example 1, if the first information indicates that the relative position of the time slot where the first reference signal burst is located in the corresponding frame is the first time slot, the interval between two adjacent reference signal bursts is 12 symbols, and the symbol position of the first reference signal burst in the time slot is the 13th symbol in the time slot. In this case, the pattern of the reference signal burst determined by the terminal device according to the first information is as follows: Figure 5 As shown, the time slot position (i.e., time slot 0) of the time slot where the first reference signal burst of the secondary cell is located is the first time slot in the frame, and the symbol position of the first reference signal burst in the time slot is the 13th symbol in the time slot.

[0080] In Example 2, the communication protocol predefines that the first reference signal of the secondary cell is sent in the first time slot of the corresponding frame. If the first information indicates that the interval between two adjacent reference signal bursts is 4 symbols, the terminal device determines the reference signal burst pattern according to the first information as follows: Figure 6 As shown, the time slot where the first reference signal burst of the secondary cell is located (i.e., time slot 0) is the first time slot in the frame, and the symbol position of the first reference signal burst in the time slot is the 5th symbol in the time slot (which can be understood as being 4 symbols apart from the start time of the time slot).

[0081] In Example 3, the communication protocol predefines that the first reference signal burst of the secondary cell is sent in the second time slot of the corresponding frame. If the first information indicates that the interval between two adjacent reference signal bursts is 6 symbols, the symbol position of the first reference signal burst in the time slot is the 7th symbol in the time slot. In this case, the pattern of the reference signal burst determined by the terminal device according to the first information is as follows: Figure 7 As shown, the time slot position (i.e., time slot 1) of the time slot where the first reference signal burst of the secondary cell is located is the second time slot in the frame, and the symbol position of the first reference signal burst in the time slot is the 7th symbol in the time slot.

[0082] S402. The terminal device receives a reference signal burst#i of the secondary cell, where the reference signal burst#i is one of the reference signal bursts indicated by the first information.

[0083] The terminal device receives the MAC CE carrying the activation command, and determines the pattern of the reference signal burst of the secondary cell according to the first information, or understands it as multiple reference signal bursts determined according to the first information. Further, the terminal device receives multiple reference signal bursts according to the pattern, and the reference signal burst#i is any one of the multiple reference signal bursts indicated in the pattern.

[0084] It should be noted that the number of reference signal bursts of the secondary cell (or the number of reference signal bursts indicated in the pattern) is related to the number of transmit beams corresponding to the secondary cell and / or the number of receive beams of the terminal device. Exemplarily, the terminal device performs two AGC settlings, one cell search, and one L1-RSRP measurement in each receive beam direction; in this case, the pattern of the reference signal burst of the secondary cell is as follows: Figure 8 As shown, the number of reference bursts of the secondary cell is the number of transmit beams (hereinafter referred to as N Tx ) and the number of receiving beams (hereinafter referred to as N Rx denoted by 4 times the product of N. Taking the transmit beam of the secondary cell including the transmit beam Tx1 as an example, the transmit beam Tx1 corresponds to the first reference signal burst, the second reference signal burst, the third reference signal burst and the fourth reference signal burst in the pattern, and the number of reference signal bursts included in each reference signal burst is calculated based on N. RxDetermined. Among them, different reference signal bursts in the first part of the burst are used to perform the first AGC settling on the transmit beam Tx1 direction in different receive beam directions, different reference signal bursts in the second part of the burst are used to perform the second AGC settling on the transmit beam Tx1 direction in different receive beam directions, different reference signal bursts in the third part of the burst are used to perform Cell search on the transmit beam Tx1 direction in different receive beam directions, and different reference signal bursts in the fourth part of the burst are used to perform L1-RSRP measurement on the transmit beam Tx1 direction in different receive beam directions.

[0085] It is understandable that when the network device sends the reference signal burst indicated by the first information to the terminal device, a resource conflict may occur with the channel or signal of other terminal devices. The following takes the resource conflict between the reference signal burst#j (one of the reference signal bursts indicated by the first information) and the channel or signal of other terminal devices as an example to illustrate the solution provided by the present application for avoiding resource conflicts of the reference signal burst resources.

[0086] In a possible implementation, when the time-frequency resources of the PDCCH overlap with the time-frequency resources of the reference signal burst#j on the first symbol, the terminal device does not expect to receive the reference signal burst#j on the first symbol. That is, when the priority of the PDCCH is greater than the priority of the reference signal burst, the network device will send the PDCCH on the first symbol and will not send the reference signal burst#j on the first symbol, i.e., puncture the first symbol in the pattern.

[0087] Alternatively, in a possible implementation, when the time-frequency resources of the physical downlink shared channel (PDSCH) overlap with the time-frequency resources of the reference signal burst#j on the second symbol, the terminal device receives the reference signal burst#j on the second symbol. That is, when the priority of the reference signal burst is greater than the priority of the PDSCH, the network device sends the reference signal burst#j on the second symbol and does not send the PDSCH on the second symbol.

[0088] Alternatively, in a possible implementation, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of the reference signal burst#j on the third symbol, the terminal device receives the reference signal burst#j on the third symbol, and the first reference signal is a CSI-RS or a demodulation reference signal (DMRS). That is, when the priority of the reference signal burst is greater than the priority of the first signal, the network device sends the reference signal burst#j on the third symbol, and does not send the first reference signal on the third symbol.

[0089] S403: The terminal device determines an index value of reference signal burst#i based on the reception time of the reference signal burst#i and the interval between two adjacent reference signal bursts.

[0090] That is, the terminal device determines the number of reference signal burst#i based on the reception time of the reference signal burst#i and the interval between two adjacent reference signal bursts, or understands it as determining which reference signal burst#i is in the frame.

[0091] In a possible implementation, the terminal device determines multiple time ranges based on the SCS of the secondary cell, the reception time difference between the primary cell and the secondary cell, and the interval between two adjacent reference signal bursts. Different time ranges in the multiple time ranges correspond to different index values. Further, the terminal device determines the index value corresponding to time range #i (i.e., the time range in which the reception time of reference signal burst #i is located in the multiple time ranges) as the index value of the reference signal burst #i.

[0092] For example, the reception time difference between the primary cell and the secondary cell is 25us, the SCS of the secondary cell is 120kHz, and the interval between two adjacent reference signal bursts is 6 symbols. Based on the SCS of the secondary cell, the maximum reception time difference between the primary cell and the secondary cell is 3 symbols. Fig. 9As shown, it is a schematic diagram of the correspondence between a time range and an index value provided in an embodiment of the present application. Wherein, each time range includes the reception time of the reference signal burst indicated by the index value corresponding to the time range; or it is understood that each time range is composed of the earliest reception time and the latest reception time of the reference signal burst indicated by the index value corresponding to the time range under various reception time differences. Further, the terminal device determines the index value of the reference signal burst#i according to the time range in which the reception time of the reference signal burst#i is located. For example, when the reception time of the reference signal burst#i is in the time range 1, the index value of the reference signal burst#i is determined to be 0, that is, the reference signal burst#i is the first reference signal burst in the frame; when the reception time of the reference signal burst#i is in the time range i, the index value of the reference signal burst#i is determined to be i-1, that is, the reference signal burst#i is the i-th reference signal burst in the frame.

[0093] S404: The terminal device performs a cell search based on the index value of the reference signal burst#i, the starting position of the first reference signal burst in the frame, and the interval between two adjacent reference signal bursts.

[0094] The terminal device determines the reception time of the first reference signal burst based on the index value of the reference signal burst#i and the interval between two adjacent reference signal bursts; then determines the starting boundary of the frame (or the starting position) based on the starting position of the first reference signal burst in the frame, and completes the cell search.

[0095] It should be noted that after the terminal device receives the reference signal burst, the AGC settling process, the cell search process or the L1-RSRP measurement process in the secondary cell activation process is performed according to the received reference signal burst. The present application does not specifically limit the AGC settling process and the L1-RSRP measurement process performed by the terminal device according to the reference signal burst, and only describes in detail the cell search process (i.e., the process of performing frame synchronization) according to the reference signal burst.

[0096] In summary, through Figure 4In the method shown, the first information affects the period of the reference signal burst by indicating the interval between two adjacent reference signal bursts, thereby improving the flexibility of the period of the reference signal burst. The method of activating the secondary cell based on the flexible periodic reception of the reference signal burst is beneficial to reducing the delay of the terminal device in activating the secondary cell compared to the method of activating the secondary cell based on the fixed periodic reception of the SSB. Moreover, in the scheme provided in the present application, the terminal device determines the index value of the reference signal burst based on the reception time of the reference signal burst, and there is no need to carry the frame indication information and the index value of the reference signal burst in the reference signal burst. Compared with the structure of the SSB including the synchronization signal and the channel for carrying the frame indication information and the SSB index, it is also beneficial to save overhead.

[0097] It is understandable that in order to implement the functions in the above embodiments, the terminal device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software transceiver components driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0098] Fig.10 and Fig.11 The following is a schematic diagram of the structure of possible communication devices provided in the embodiments of the present application. These communication devices can be used to implement the functions of the terminal device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be as follows: Figure 1 The terminal 120 shown may also be a module (such as a chip) applied to a terminal device, or the communication device may be Figure 1 The network device 110 shown may also be a module (such as a chip) applied to a network device.

[0099] like Fig.10 As shown, the communication device 1000 includes a processing unit 1010 and a transceiver unit 1020. The communication device 1000 is used to implement the above Figure 4 The functions of the terminal device in the method embodiment shown in FIG.

[0100] When the communication device 1000 is used to implement Figure 4The functions of the terminal device in the method embodiment shown are: a transceiver unit 1020, used to receive first information from a network device, the first information indicating a starting position of a first reference signal burst of a secondary cell in a frame and an interval between two adjacent reference signal bursts; the transceiver unit 1020, also used to receive a reference signal burst #i of the secondary cell, the reference signal burst #i being one of the reference signal bursts indicated by the first information; a processing unit 1010, used to determine an index value of a reference signal burst #i based on a reception time of the reference signal burst #i and an interval between two adjacent reference signal bursts; the processing unit 1010, also used to perform a cell search based on the index value of the reference signal burst #i, the starting position of the first reference signal burst in a frame and an interval between two adjacent reference signal bursts.

[0101] In a possible implementation, the processing unit 1010 is also used to determine multiple time ranges based on the subcarrier spacing of the secondary cell, the reception time difference between the primary cell and the secondary cell, and the interval between two adjacent reference signal bursts, and different time ranges in the multiple time ranges correspond to different index values; the processing unit 1010 is also used to determine the index value corresponding to the time range #i as the index value of the reference signal burst #i, and the time range #i is the time range in which the reception time of the reference signal burst #i is located in the multiple time ranges.

[0102] In a possible implementation, the interval between two adjacent reference signal bursts is greater than or equal to Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the subcarrier spacing SCS of the secondary cell satisfies SCS=15kHz·2 μ , ΔT is the reception time difference between the primary cell and the secondary cell.

[0103] In one possible implementation, when the time-frequency resources of the physical downlink control channel PDCCH overlap with the time-frequency resources of the reference signal burst #j in the first symbol, the terminal device does not expect to receive the reference signal burst #j in the first symbol, and the reference signal burst #j is one of the reference signal bursts indicated by the first information; or, when the time-frequency resources of the physical downlink shared channel PDSCH overlap with the time-frequency resources of the reference signal burst #j in the second symbol, the transceiver unit 1020 is also used to receive the reference signal burst #j in the second symbol; or, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of the reference signal burst #j in the third symbol, the transceiver unit 1020 is also used to receive the reference signal burst #j in the third symbol, and the first reference signal is a channel state information reference signal CSI-RS or a demodulation reference signal DMRS.

[0104] For more detailed description of the transceiver unit 1020 and the processing unit 1010, please refer to Figure 4 Relevant description of the terminal device in the method embodiment shown.

[0105] like Fig.10 As shown, the communication device 1000 includes a processing unit 1010 and a transceiver unit 1020. The communication device 1000 is used to implement the above Figure 4 The functions of the network device in the method embodiment shown in FIG.

[0106] When the communication device 1000 is used to implement Figure 4 In the method embodiment shown, the function of the network device is: the transceiver unit 1020 is used to send a first information to the terminal device, the first information indicating the starting position of the first reference signal burst of the secondary cell in the frame and the interval between two adjacent reference signal bursts; wherein the interval between two adjacent reference signal bursts is greater than or equal to Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the subcarrier spacing SCS of the secondary cell satisfies SCS=15kHz·2 μ , ΔT is the reception time difference between the primary cell and the secondary cell; the transceiver unit 1020 is also used to send a reference signal burst of the secondary cell to the terminal device based on the starting position of the first reference signal burst in the frame and the interval between two adjacent reference signal bursts, and the reference signal burst of the secondary cell includes the first reference signal burst.

[0107] In a possible implementation, when the time-frequency resources of the physical downlink control channel PDCCH overlap with the time-frequency resources of the reference signal burst #j in the first symbol, the transceiver unit 1020 is further used to send the PDCCH in the first symbol, and not send the reference signal burst #j in the first symbol, and the reference signal burst #j is one of the reference signal bursts indicated by the first information; or, when the time-frequency resources of the physical downlink shared channel PDSCH overlap with the time-frequency resources of the reference signal burst #j in the second symbol, the transceiver unit 1020 is further used to send the reference signal burst #j in the second symbol, and not send the PDSCH in the second symbol; or, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of the reference signal burst #j in the third symbol, the transceiver unit 1020 is further used to send the reference signal burst #j in the third symbol, and not send the first reference signal in the third symbol, and the first reference signal is a channel state information reference signal CSI-RS or a demodulation reference signal DMRS.

[0108] For more detailed description of the transceiver unit 1020 and the processing unit 1010, please refer to Figure 4 The relevant description of the network device in the method embodiment is shown.

[0109] like Fig.11As shown, the communication device 1100 includes a processor 1110 and an interface circuit 1120. The processor 1110 and the interface circuit 1120 are coupled to each other. It is understood that the interface circuit 1120 can be a transceiver or an input-output interface. Optionally, the communication device 1100 may also include a memory 1130 for storing instructions executed by the processor 1110 or storing input data required by the processor 1110 to execute instructions or storing data generated after the processor 1110 executes instructions.

[0110] When the communication device 1100 is used to implement Figure 4 When the method is shown, the processor 1110 is used to implement the functions of the above-mentioned processing unit 1010, and the interface circuit 1120 is used to implement the functions of the above-mentioned transceiver unit 1020.

[0111] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment. The terminal chip receives information from the base station, which can be understood as the information is first received by other modules in the terminal (such as a radio frequency module or an antenna), and then sent to the terminal chip by these modules. The terminal chip sends information to the base station, which can be understood as the information is first sent to other modules in the terminal (such as a radio frequency module or an antenna), and then sent to the base station by these modules.

[0112] When the above-mentioned communication device is a chip applied to a network device, the network device chip implements the function of the network device in the above-mentioned method embodiment. The network device chip receives information from the terminal, which can be understood as the information is first received by other modules in the network device (such as a radio frequency module or an antenna), and then sent to the network device chip by these modules. The network device chip sends information to the terminal, which can be understood as the information is sent to other modules in the network device (such as a radio frequency module or an antenna), and then sent to the terminal by these modules.

[0113] In the present application, when entity A sends information to entity B, it can be that A sends it directly to B, or that A sends it to B indirectly through other entities. Similarly, when entity B receives information from entity A, it can be that entity B directly receives the information sent by entity A, or that entity B indirectly receives the information sent by entity A through other entities. Entities A and B here can be RAN nodes or terminals, or modules inside the RAN nodes or terminals. The sending and receiving of information can be information interaction between a RAN node and a terminal, for example, information interaction between a base station and a terminal; the sending and receiving of information can also be information interaction between two RAN nodes, for example, information interaction between a CU and a DU; the sending and receiving of information can also be information interaction between different modules inside a device, for example, information interaction between a terminal chip and other modules of the terminal, or information interaction between a base station chip and other modules in the base station.

[0114] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0115] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also be present in a base station or a terminal as discrete components.

[0116] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0117] In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0118] In the present application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of the present application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of the present application, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0119] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A method for activating a secondary cell, characterized in that: The method is applied to a terminal device or a module in the terminal device, and the method includes: receiving first information from a network device, where the first information indicates a starting position of a first reference signal burst of a secondary cell in a frame and an interval between two adjacent reference signal bursts; receiving a reference signal burst #i of the secondary cell, where the reference signal burst #i is one of the reference signal bursts indicated by the first information; Determine the index value of the reference signal burst #i based on the reception time of the reference signal burst #i and the interval between the two adjacent reference signal bursts; A cell search is performed based on the index value of the reference signal burst #i, the starting position of the first reference signal burst in the frame, and the interval between the two adjacent reference signal bursts.

2. The method according to claim 1, characterized in that: The determining the index value of the reference signal burst #i based on the reception time of the reference signal burst #i and the interval between the two adjacent reference signal bursts includes: Determine, based on the subcarrier spacing of the secondary cell, the reception time difference between the primary cell and the secondary cell, and the interval between the two adjacent reference signal bursts, a plurality of time ranges, wherein different time ranges in the plurality of time ranges correspond to different index values; An index value corresponding to a time range #i is determined as an index value of the reference signal burst #i, and the time range #i is a time range in which a reception time of the reference signal burst #i is located among the multiple time ranges.

3. The method according to claim 1 or 2, characterized in that: The interval between two adjacent reference signal bursts is greater than or equal to Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the subcarrier spacing SCS of the secondary cell satisfies SCS=15kHz·2 μ , the ΔT is the reception time difference between the primary cell and the secondary cell.

4. The method according to any one of claims 1 to 3, characterized in that: In a case where the time-frequency resources of the physical downlink control channel PDCCH overlap with the time-frequency resources of the reference signal burst #j on the first symbol, the terminal device does not expect to receive the reference signal burst #j on the first symbol, and the reference signal burst #j is one of the reference signal bursts indicated by the first information; Alternatively, when the time-frequency resources of the physical downlink shared channel PDSCH overlap with the time-frequency resources of the reference signal burst #j on the second symbol, the reference signal burst #j is received on the second symbol; Alternatively, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of the reference signal burst #j on the third symbol, the reference signal burst #j is received in the third symbol, and the first reference signal is a channel state information reference signal CSI-RS or a demodulation reference signal DMRS.

5. A method for activating a secondary cell, characterized in that: The method is applied to a network device or a module in the network device, and the method comprises: Sending first information to the terminal device, where the first information indicates a starting position of a first reference signal burst of the secondary cell in a frame and an interval between two adjacent reference signal bursts; The interval between two adjacent reference signal bursts is greater than or equal to Wherein, μ is an integer greater than or equal to -1, and the relationship between μ and the subcarrier spacing SCS of the secondary cell satisfies SCS=15kHz·2 μ , the ΔT is a reception time difference between the primary cell and the secondary cell; Based on the starting position of the first reference signal burst in the frame and the interval between the two adjacent reference signal bursts, the reference signal burst of the secondary cell is sent to the terminal device, and the reference signal burst of the secondary cell includes the first reference signal burst.

6. The method according to claim 5, characterized in that: In a case where the time-frequency resources of a physical downlink control channel PDCCH overlap with the time-frequency resources of a reference signal burst #j on a first symbol, the PDCCH is sent in the first symbol, and the reference signal burst #j is not sent in the first symbol, and the reference signal burst #j is one of the reference signal bursts indicated by the first information; Alternatively, when the time-frequency resources of the physical downlink shared channel PDSCH overlap with the time-frequency resources of the reference signal burst #j on the second symbol, the reference signal burst #j is sent in the second symbol, and the PDSCH is not sent in the second symbol; Alternatively, when the time-frequency resources of the first reference signal overlap with the time-frequency resources of the reference signal burst #j on the third symbol, the reference signal burst #j is sent in the third symbol, and the first reference signal is not sent in the third symbol, and the first reference signal is a channel state information reference signal CSI-RS or a demodulation reference signal DMRS.

7. A communication device, characterized in that: The method comprises a module for executing the method according to any one of claims 1 to 4, or comprises a module for executing the method according to claim 5 or 6.

8. A communication device, characterized in that: The method comprises a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method as claimed in any one of claims 1 to 4 through a logic circuit or by executing code instructions, or the processor is used to implement the method as claimed in claim 5 or 6 through a logic circuit or by executing code instructions.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or instruction. When the computer program or instruction is executed by the communication device, the communication device implements the method according to any one of claims 1 to 4, or implements the method according to claim 5 or 6.

10. A computer program product, characterized in that The computer program product includes a computer program or instructions. When the computer program or instructions are executed by a communication device, the communication device implements the method according to any one of claims 1 to 4, or implements the method according to claim 5 or 6.

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