WO2025166593A1 - Synchronization signal block triggering method and apparatus - Google Patents

Abstract

Embodiments of the present application provide a synchronization signal block triggering method and apparatus. The method comprises: a terminal device receiving a MAC CE from a network device, wherein the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or the terminal device performing measurement and/or synchronization on the basis of the synchronization signal block (SSB) of the activated secondary cell.

Description

Synchronous signal block triggering method and device Technical Field

The embodiments of the present application relate to the field of communication technologies.

Background Art

As a crucial component of new global infrastructure, 5G communication networks have experienced rapid development in recent years. As networks expand, operators' energy consumption continues to rise. For example, data released by China's Ministry of Industry and Information Technology indicates that energy consumption will increase by approximately 80% between 2015 and 2022.

With the construction of 5G and the large-scale commercial use of 5G active antenna units (AAUs), energy consumption is expected to increase exponentially compared to the remote radio units (RRUs) used primarily in 3G and 4G due to their higher power consumption. 5G defines three major service types: enhanced mobile broadband (eMBB), massive machine type of communication (mMTC), and ultra-reliable low-latency communication (URLLC). This is driving an increase in bursty small packet traffic and the 24/7 operation of base stations. The average daily energy consumption of 5G sites is expected to be more than double that of 4G.

In the 5G era, 3GPP has introduced key technologies such as Massive MIMO and increased RF bandwidth. 5G supports higher data rates and greater data traffic, requiring more transmission bandwidth. High-frequency bands will be the primary frequency band for future 5G expansion. However, the transmission characteristics of high-frequency bands limit site coverage, resulting in denser 5G site deployments. Furthermore, the increased energy consumption will place significant pressure on operators' operating costs. Therefore, network energy conservation is crucial for reducing operating costs, and energy conservation in 5G networks is a pressing issue.

To achieve energy conservation, network devices can perform energy conservation processing in the time domain, frequency domain, spatial domain, and/or energy domain based on network load. For example, in the spatial and energy domains, network devices can turn off some antennas to achieve energy conservation when the load is low. In the time domain, network devices can adjust the period or time domain position of cell-common reference signals (such as SSB/SIB) when there are few users and light load to achieve energy conservation.

It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

Summary of the Invention

The inventors discovered that: in the time domain, for a service cell that serves only as a secondary cell, when there is no load on the service cell and no data transmission is required, the network equipment can turn off/stop the transmission of the common reference signal of the service cell (such as SSB) to achieve the purpose of energy saving; when there is a load on the service cell and data transmission is required, the network equipment activates/triggers the common reference signal of the service cell through signaling for L1/L3 measurement of the terminal device, rapid activation of the secondary cell and other operations. This energy-saving method of turning on or off the transmission of the common reference signal according to changes in business volume can not only ensure the normal communication of the terminal device, but also achieve the purpose of energy saving of the network device. Therefore, how to trigger/activate the common reference signal has become a problem that needs to be solved urgently in network energy-saving technology.

In response to at least one of the above problems, an embodiment of the present application provides a method and device for triggering a synchronization signal block.

According to one aspect of an embodiment of the present application, a method for triggering a synchronization signal block (SSB) is provided, including:

The terminal device receives a MAC CE from a network device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or

The terminal device performs measurement and/or synchronization based on the activated synchronization signal block (SSB) of the secondary cell.

According to another aspect of an embodiment of the present application, a synchronization signal block (SSB) triggering device is provided, including:

a receiving unit configured to receive a MAC CE from a network device; the MAC CE being used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or

A processing unit is configured to perform measurement and/or synchronization based on a synchronization signal block (SSB) of the activated secondary cell.

According to another aspect of an embodiment of the present application, a method for triggering a synchronization signal block (SSB) is provided, including:

The network device sends a MAC CE to the terminal device; the MAC CE is used to activate/deactivate the secondary cell and/or activate/deactivate the synchronization signal block (SSB) of the secondary cell.

According to another aspect of an embodiment of the present application, a synchronization signal block (SSB) triggering device is provided, including:

A sending unit, which sends a MAC CE to a terminal device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell.

According to another aspect of an embodiment of the present application, a communication system is provided, including:

A network device that sends a MAC CE to a terminal device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or,

A terminal device performs measurement and/or synchronization based on the activated synchronization signal block (SSB) of the secondary cell.

One of the beneficial effects of the embodiments of the present application is that in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can quickly and flexibly adjust SSB transmission, which can not only improve network gain (such as energy-saving gain) but also ensure normal transmission of terminal equipment.

With reference to the following description and drawings, the specific implementation of the present application is disclosed in detail, indicating the principle of the present application. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

It should be emphasized that the term "include/comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components.

BRIEF DESCRIPTION OF THE DRAWINGS

The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG2 is a schematic diagram of the time-frequency structure of SSB;

FIG3 is a schematic diagram of a secondary cell activation/deactivation MAC CE according to an embodiment of the present application;

FIG4 is a schematic diagram of a secondary cell activation/deactivation MAC CE according to an embodiment of the present application;

FIG5 is a schematic diagram of an enhanced secondary cell activation/deactivation MAC CE according to an embodiment of the present application;

FIG6 is a schematic diagram of an enhanced secondary cell activation/deactivation MAC CE according to an embodiment of the present application;

FIG7 is a schematic diagram of a method for triggering a synchronization signal block according to an embodiment of the present application;

FIG8 is a schematic diagram of a MAC CE according to an embodiment of the present application;

FIG9 is a schematic diagram of a MAC CE according to an embodiment of the present application;

FIG10 is a schematic diagram of a method for triggering a synchronization signal block according to an embodiment of the present application;

FIG11 is a schematic diagram of a triggering device for a synchronization signal block according to an embodiment of the present application;

FIG12 is a schematic diagram of a triggering device for a synchronization signal block according to an embodiment of the present application;

FIG13 is a schematic diagram of a terminal device according to an embodiment of the present application;

FIG14 is a schematic diagram of a network device according to an embodiment of the present application.

DETAILED DESCRIPTION

The above and other features of the present application will become apparent from the following description with reference to the accompanying drawings. In the description and drawings, specific embodiments of the present application are disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes All modifications, variations and equivalents coming within the scope of the appended claims.

In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and/or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), etc.

Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, such as but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services for the terminal device. Network devices may include, but are not limited to, base stations (BS), access points (AP), transmission reception points (TRP), broadcast transmitters, mobile management entities (MME), gateways, servers, radio network controllers (RNC), base station controllers (BSC), and the like.

Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio head (RRH, Remote Radio Head), remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). The term "base station" can include some or all of their functions. Each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminals, vehicle-mounted communication terminals, device-to-device (D2D) terminals, machine-to-machine (M2M) terminals, and the like.

In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

System message design is a key concept in wireless communication systems. Cell-level system messages are primarily used for configuring cell residency, providing user access, and interoperability. 5G NR simplifies system messages to a certain extent, differing from 4G in both synchronization signaling and system message design. Therefore, a new understanding is necessary.

Different from the 4G design that separates the cell downlink synchronization signal and the physical broadcast channel, 5G couples the cell synchronization signal (SS, Synchronization Signal) and the physical broadcast channel (PBCH, Physical Broadcast Channel) to some extent, appearing in the form of SS/PBCH resource blocks, referred to as synchronization signal blocks (SSBs).

Figure 2 illustrates the time-frequency structure of the SSB. As shown in Figure 2, in 5G NR, the SSB occupies 20 consecutive physical resource blocks (PRBs) in the frequency domain, totaling up to 240 consecutive resource elements (REs). The synchronization signals (including the primary synchronization signal (PSS) and the secondary synchronization signal (SSS)) occupy 127 consecutive REs in the first and third OFDM symbols of the SSB, respectively. The SSB frequency center position can be flexibly configured and adjusted based on localization.

After the UE achieves SSB synchronization through frequency search, it decodes the Master Information Block (MIB) in the physical broadcast channel. In the LTE system, in addition to configuring the MIB, the cell also configures SIB1 according to a fixed transmission cycle, and transmits the necessary parameter configurations for parsing SIB2 to SIBN through SIB1. 5G NR provides an optimized mechanism for system message configuration, that is, it is configured on demand, and SIB1 is not necessarily configured according to a fixed cycle in principle. However, SIB1 transmits important information related to cell selection, and even if it is not configured according to a fixed cycle, it needs to be semi-statically configured through RRC signaling. Since the PDCCH carries limited content, and cell-level system messages generally do not change dynamically, PDCCH is generally not used to carry system messages during design. In 5G NR, configuration is achieved semi-statically through RRC messages.

The "on-demand" design concept of 5G NR system messages greatly reduces the resource usage overhead of system messages. At the same time, terminal devices can also reduce the power consumption caused by periodic monitoring of system messages to a certain extent. In 5G NR, the ssb-SubcarrierOffset parameter in the MIB determines whether SIB1 is configured in PDCCH common search space CORESET#0. This parameter represents the subcarrier offset of the frequency domain starting position of the SSB relative to the common PRB. For 5G cell carriers in the FR1 (sub-6 GHz) band, the UE determines the subcarrier offset of the SSB relative to the common PRB in combination with the PBCH additional time domain payload bit. The value range is 0 to 31. If the value is not greater than 23, the UE assumes that the cell is configured with the system message SIB1. Otherwise, the SIB1 bearer content does not appear as a system message. For 5G cell carriers in the FR2 band, the UE determines the subcarrier offset only using the ssb-SubcarrierOffset parameter. The value range is 0 to 15. If the value is not greater than 11, the UE assumes that the cell is configured with the system message SIB1. Otherwise, the SIB1 bearer content does not appear as a system message. If this parameter is not configured, the UE determines the frequency domain subcarrier offset of the SSB through frequency search.

5G NR introduces the concept of shaped narrow beams. The beam pattern is not clearly defined. In one SSB transmission cycle, the shaped narrow beams sent by SSB at different candidate transmission moments are different. The protocol stipulates that the maximum SSB transmission One is generated every 80ms, which means that at least within the 80ms high-level scheduling period, the high-level content carried by the SSB will not change. The physical layer transmission period of SSB can be configured through the high-level parameter ssb-periodicityServingCell, with a value range of {5ms, 10ms, 20ms, 40ms, 80ms, 160ms}. The SSB repetition period is mainly set for the purpose of SSB transmission rate matching. The larger the period, the less time domain resources the SSB occupies, and the UE listening period may be lengthened accordingly. If this parameter is not configured, the UE defaults to an SSB transmission period of 5ms. The protocol stipulates that during the initial cell selection, the UE can assume 20ms as the period to search for the half-frame containing the SSB, which provides a theoretical basis for the UE to optimize the downlink synchronization network search mechanism.

For different subcarrier spacings, the candidate positions of SSBs per transmission half-frame are defined as follows:

A: With a subcarrier spacing of 15 kHz, for NR carrier frequencies within the FR1 band that are no greater than 3 GHz, the candidate transmission times for SSB can be configured at the {2, 8} OFDM positions of time slots 0 and 1, for a total of four candidate times. For NR carrier frequencies within the FR1 band that are greater than 3 GHz, the candidate transmission times for SSB can be configured at the {2, 8} OFDM positions of time slots 0, 1, 2, and 3, for a total of eight candidate times.

B: With a subcarrier spacing of 30 kHz, for NR carrier frequencies within the FR1 band and not exceeding 3 GHz, the candidate transmission times for SSB can be configured at the {4, 8, 16, 20} OFDM positions calculated starting from slot 0, for a total of four candidate times. For NR carrier frequencies within the FR1 band and exceeding 3 GHz, the candidate transmission times for SSB can be configured at the {4, 8, 16, 20} OFDM positions calculated starting from slots 0 and 2, for a total of eight candidate times.

C: Subcarrier spacing is 30kHz. In 5G FDD spectrum mode, for NR carrier frequencies within the FR1 band that are not greater than 3GHz, the candidate transmission time of SSB can be configured at the {2, 8} OFDM positions in time slots 0 and 1, for a total of 4 candidate time slots. For NR carrier frequencies greater than 3GHz in the FR1 band, the candidate transmission time of SSB can be configured at the {2, 8} OFDM positions in time slots 0, 1, 2, and 3, for a total of 8 candidate time slots. In 5G TDD spectrum mode, for NR carrier frequencies within the FR1 band that are not greater than 2.4GHz, the candidate transmission time of SSB can be configured at the {2, 8} OFDM positions in time slots 0 and 1, for a total of 4 candidate time slots. For NR carrier frequencies greater than 2.4GHz in the FR1 band, the candidate transmission time of SSB can be configured at the {2, 8} OFDM positions in time slots 0, 1, 2, and 3, for a total of 8 candidate time slots.

D: Subcarrier spacing is 120 kHz. For NR carrier frequencies in the FR2 band, the candidate transmission times for SSB are configured at time slots 0, 2, 4, 6, 10, 12, 14, 16, 20, 22, 24, 26, 30, 32, 34, and 36, which are the starting OFDM positions of {4, 8, 16, 20}, for a total of 64 candidate times.

E: The subcarrier spacing is 240 kHz. For the NR carrier frequency in the FR band, the candidate transmission times of the SSB are configured at time slots 0, 4, 8, 12, 20, 24, 28, and 32, which are the starting OFDM positions {8, 12, 16, 20, 32, 36, 40, 44}, for a total of 64 candidate times.

For the SSB candidate position patterns ABCDE transmitted within a half-frame, the UE can determine the specific index position of the currently transmitted SSB by decoding the PBCH payload bits. For a half-frame containing four SSB candidate transmission positions, the index is determined by two low-significant bits (LSBs), while for a half-frame containing eight SSB candidate transmission positions, the index is determined by three low-significant bits (LSBs). In both cases, the PBCH index corresponds exactly to the initial sequence index of the pseudo-random sequence of the DMRS in the SSB. When determining the two or three low-significant bits, the UE does not directly determine them by decoding the PBCH transmitted bits, but indirectly by decoding the DMRS for logical mapping. A half-frame contains 64 SSB candidate transmission positions. The index of the DMRS in the transmitted SSB is cyclically mapped according to the three low-significant bits (8 SSB cycles). The UE combines the three low-significant bits (LSBs) with the three additional most significant bits (MSBs) of the PBCH payload to determine the SSB transmission index. The PBCH payload has a total of 32 bits, including 23 bits for carrying RRC content. Of these 23 bits, 6 bits are used to calculate the high-order 6 bits of the radio frame. In addition to these 23 bits, the physical layer uses an additional 4 bits related to the transmission time as the low-order 4 bits for calculating the radio frame, 1 bit as the half-frame identifier in the radio frame, and 3 bits as the high-order 3 bits for determining the SSB index. The remaining 1 bit is not specified by the protocol, and the MAC layer entity fills it in to align with the transmission byte.

The SSB pattern specifies the possible candidate SSB positions within the SSB burst set (SS-burst) and the maximum number of SSBs, L _max . The number of activated SSBs can be less than L _max . The base station notifies the UE of the specific activated SSBs via SIB1 or the higher-layer parameter ssb-PositionInBurst in UE-specific RRC signaling. For more information about SSB-related RRC parameters, refer to the relevant literature.

The above is a schematic illustration of the SSB-related content of the embodiments of the present application, and the present application is not limited thereto. The inventors have discovered that currently, SSB information such as the SSB period (ssb-periodicityServingCell) and the time domain position of the activated SSB within the SS-burst (ssb-PositionInBurst) are configured through RRC parameters. If the network device needs to adjust the SSB configuration information, it can only be achieved through RRC reconfiguration messages, which takes a long time to change and cannot quickly and flexibly adjust the SSB.

The network device may configure the SSB for the secondary cell, and the terminal device may perform measurement and synchronization operations based on the SSB configured at a fixed period; the network device may also not configure the SSB on the secondary cell, and the network device may configure a reference cell for the secondary cell, and the terminal device may perform measurement and synchronization based on the SSB of the reference cell. The terminal device defaults to the reference cell and the current secondary cell being synchronized and co-located, and the terminal device may perform time and frequency synchronization operations on the current secondary cell based on the SSB of the reference cell.

In network energy-saving technology, network equipment needs to implement the operation of turning off SSB when there is no load and triggering/activating SSB when there is load on the secondary cell. However, the existing protocol does not support the behavior of network equipment or terminal equipment triggering/activating SSB (or on-demand SSB) transmission when the secondary cell does not transmit SSB. To activate/trigger/indicate SSB (or on-demand SSB).

In the embodiments of the present application, high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, MIB, system information, or a dedicated RRC message; or an RRC IE (RRC information element). High-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC CE (MAC control element). However, the present application is not limited thereto.

Figure 3 is a schematic diagram of a secondary cell activation/deactivation MAC CE according to an embodiment of the present application. A 1-octet Scell activation/deactivation MAC CE includes a MAC subheader with an LCID. As shown in Figure 3 , the MAC CE has a fixed size, consisting of seven C fields (also called fields) and one R field.

Figure 4 is a schematic diagram of a secondary cell activation/deactivation MAC CE according to an embodiment of the present application. A 4-octet Scell activation/deactivation MAC CE includes a MAC subheader with an LCID. As shown in Figure 4 , the MAC CE has a fixed size, consisting of 31 C fields and 1 R field.

The meanings of the C and R fields are as follows:

_Ci : If there is an SCell configured by the MAC entity with a specified SCellIndex of i, this field indicates the activation/deactivation status of the SCell with SCellIndex i. Otherwise, the MAC entity ignores the Ci field. If the Ci field is set to 1, it indicates that the cell with SCellIndex i is activated; if the Ci field is set to 0, it indicates that the cell with SCellIndex i is deactivated.

R: Reserved bit, set to 0.

Figure 5 is a schematic diagram of an enhanced secondary cell activation/deactivation MAC CE according to an embodiment of the present application. The enhanced Scell activation/deactivation MAC CE includes one octet Ci field and is identified by a MAC subheader with an eLCID. As shown in Figure 5 , the size of this MAC CE is variable and includes seven C fields, one R field, and zero or more TRS ID _j fields, arranged in ascending order according to the ScellIndex of the secondary cell to be activated, as indicated by the Ci field.

Figure 6 is a schematic diagram of an enhanced secondary cell activation/deactivation MAC CE according to an embodiment of the present application. The enhanced Scell activation/deactivation MAC CE includes four octet Ci fields and is identified by a MAC subheader with an eLCID. As shown in Figure 6 , the size of this MAC CE is variable and includes 31 C fields, one R field, and zero or more TRS ID _j fields, arranged in ascending order according to the ScellIndex of the secondary cell to be activated, as indicated by the Ci field.

The meanings of the C field, TRS ID _j field, and R field are as follows:

_Ci : If there is an SCell configured by the MAC entity with a specified SCellIndex of i, this field indicates the activation/deactivation status of the SCell with SCellIndex i. Otherwise, the MAC entity ignores the Ci field. If the Ci field is set to 1, it indicates that the cell with SCellIndex i will be activated and the TRS ID field will be included for the cell. If the Ci field is set to 0, it indicates that the cell with SCellIndex i will be deactivated and the cell will not contain the TRS ID field.

TRS ID _j : If TRS ID j is set to a non-zero value, it indicates that the specified scellActivationRS- Id corresponds to the TRS address; if TRS IDj is set to zero, it means that the corresponding cell does not use TRS.

R: Reserved bit, set to 0.

In the following description, without causing confusion, the terms "PDCCH" and "physical downlink control channel" or "downlink control information" can be interchanged, and the terms "PDSCH" and "physical downlink data channel" or "downlink data" can also be interchanged. In addition, sending (transmitting) or receiving (receiving) PDCCH can be understood as sending or receiving downlink control information carried by PDCCH; sending or receiving PDSCH can be understood as sending or receiving downlink data carried by PDSCH. In the embodiments of the present application, the terms "indication", "activation" and "trigger" can be interchanged, or two or more of them can be used in combination.

Embodiments of the first aspect

The present application embodiment provides a method for activating/indicating/triggering a synchronization signal block, which is described from the perspective of a terminal device. FIG7 is a schematic diagram of a method for triggering a synchronization signal block according to an embodiment of the present application. As shown in FIG7 , the method includes:

701. The terminal device receives a MAC CE from a network device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or

702. The terminal device performs measurement and/or synchronization based on the synchronization signal block (SSB) of the activated secondary cell.

It is worth noting that FIG7 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG7 above.

In an embodiment of the present application, a network device may configure one or more secondary cells (Scells) for a terminal device through RRC, and may configure an SSB (e.g., called an on-demand SSB) for one or more secondary cells (Scells). The configured secondary cells may be activated/deactivated through MAC CE, and/or the SSB of the configured secondary cells may be activated/deactivated.

In some embodiments, the SCell Activation/Deactivation MAC CE may be reused, or the enhanced SCell Activation/Deactivation MAC CE may be reused, or a new MAC CE may be defined, but the present application is not limited thereto.

In some embodiments, the MAC CE includes at least a plurality of _Ci fields and at least one reserved field; the reserved field is set to a predetermined value. This MAC CE may be referred to as a first MAC CE (MAC CE 1) hereinafter.

For example, the MAC CE is a secondary cell activation/deactivation MAC CE or an enhanced secondary cell activation/deactivation MAC CE; the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 Ci _fields and 1 reserved field, or the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 Ci fields and 1 reserved field. The active MAC CE includes at least 31 Ci _fields and 1 reserved field. The reserved field (R field) is set to 0. For the secondary cell activation/deactivation MAC CE, please refer to Figure 2 or Figure 3, and for the enhanced secondary cell activation/deactivation MAC CE, please refer to Figure 4 or Figure 5.

In some embodiments, the _Ci field is set to a first value, indicating that the secondary cell with a secondary cell index of i is activated, and/or the terminal device assumes that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with a secondary cell index of i is activated.

For example, the first value is 1, the _Ci field is set to 1, indicating that the secondary cell with the secondary cell index (SCellIndex) i is activated, and/or the terminal device assumes that the SSB/on-demand SSB of the secondary cell with the secondary cell index (SCellIndex) i is activated.

In some embodiments, the _Ci field is set to a second value, indicating that the secondary cell with the secondary cell index i is deactivated, and/or the terminal device assumes that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is deactivated.

For example, the second value is 0, the _Ci field is set to 0, indicating that the secondary cell with the secondary cell index (SCellIndex) i is deactivated, and/or the terminal device assumes that the SSB/on-demand SSB of the secondary cell with the secondary cell index (SCellIndex) i is deactivated.

In some embodiments, the MAC CE includes at least multiple _Ci fields and at least one reserved field; the reserved field indicates whether the MAC CE is used for secondary cell activation/deactivation, and/or the reserved field indicates whether the MAC CE is used for SSB activation/deactivation of the secondary cell. This MAC CE may be referred to as a second MAC CE (MAC CE 2) hereinafter.

For example, the MAC CE is a secondary cell activation/deactivation MAC CE or an enhanced secondary cell activation/deactivation MAC CE; the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 Ci _fields and 1 reserved field, or the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 31 Ci _fields and 1 reserved field. For the secondary cell activation/deactivation MAC CE, please refer to Figure 2 or Figure 3, and for the enhanced secondary cell activation/deactivation MAC CE, please refer to Figure 4 or Figure 5.

In some embodiments, the reserved field is set to a first value, indicating that the MAC CE is used for secondary cell activation/deactivation, and/or, the MAC CE is used for SSB activation/deactivation of the secondary cell.

For example, the reserved field (R field) is set to 1, indicating that the MAC CE is used for secondary cell activation/deactivation, and/or, the reserved field (R field) is set to 1, indicating that the MAC CE is used for SSB activation/deactivation.

In some embodiments, the reserved field is set to a second value, indicating that the MAC CE is used for secondary cell activation. /deactivation, and/or, the MAC CE is used for SSB activation/deactivation of the secondary cell.

For example, the reserved field (R field) is set to 0, indicating that the MAC CE is used for secondary cell activation/deactivation, and/or, the reserved field (R field) is set to 0, indicating that the MAC CE is used for SSB activation/deactivation.

For another example, the reserved field (R field) can be named X field (X filed), and X can also be other letters or titles; the present application is not limited to this.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates the SSB activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device.

In some embodiments, the _Ci field is set to a first value, indicating that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is activated, and/or, the _Ci field is set to a second value, indicating that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is deactivated.

For example, if the reserved field (R-field) of the MAC CE is set to a certain value (e.g., set to 0), it can indicate that the MAC CE is used for secondary cell activation/deactivation. The meaning of the C field can be as follows:

C _i : If there is a secondary cell configured by the MAC entity, the secondary cell index (SCellIndex) is i, and the C _i domain indicates the activation/deactivation status of the secondary cell with the secondary cell index (SCellIndex) i. If the secondary cell with the secondary cell index (SCellIndex) i is not configured, the terminal device ignores the C _i domain.

The _Ci domain is set to 1, indicating that the secondary cell with the secondary cell index (SCellIndex) i is activated, and/or, the SSB of the secondary cell with the secondary cell index (SCellIndex) i is activated; the _Ci domain is set to 0, indicating that the secondary cell with the secondary cell index (SCellIndex) i is deactivated, and/or, the SSB of the secondary cell with the secondary cell index (SCellIndex) i is deactivated.

For another example, if the reserved field (R-field) of the MAC CE is set to a certain value (e.g., set to 1), it can indicate that the MAC CE is used for SSB activation/deactivation of the secondary cell. The meaning of the C field can be as follows:

C _i : If there is a secondary cell configured by the MAC entity, the secondary cell index (SCellIndex) is i, and the C _i domain indicates the SSB activation/deactivation status of the secondary cell with the secondary cell index (SCellIndex) i. If the secondary cell with the secondary cell index (SCellIndex) i is not configured, the terminal device ignores the C _i domain.

The _Ci field is set to 1, indicating that the SSB/on-demand SSB of the secondary cell with the secondary cell index (SCellIndex) i is activated/triggered; the _Ci field is set to 0, indicating that the SSB/on-demand SSB of the secondary cell with the secondary cell index (SCellIndex) i is deactivated.

In some embodiments, the MAC CE includes an LCID or an eLCID; the code point or index of the LCID is 57 or 58, or the code point of the eLCID is 231 or 232, and the index of the eLCID is 295 or 296.

The above description uses the secondary cell activation/deactivation MAC CE or enhanced secondary cell activation/deactivation MAC CE as an example, but the present application is not limited thereto. For example, a newly defined MAC CE may also be used. For example, the newly defined MAC CE includes an LCID or an eLCID; the code point or index of the LCID is greater than or equal to 35 and less than or equal to 46, or the code point of the eLCID is greater than or equal to 0 and less than or equal to 226, and the index of the eLCID is greater than or equal to 64 and less than or equal to 289.

In some embodiments, the MAC CE is a newly defined MAC CE, including multiple _Ci fields, multiple _Si fields, and at least one reserved field; the _Ci field indicates that the MAC CE is used for secondary cell activation/deactivation, and the _Si field indicates that the MAC CE is used for SSB activation/deactivation of the secondary cell. This MAC CE may be referred to as a third MAC CE (MAC CE 3) hereinafter.

FIG8 is a schematic diagram of a MAC CE according to an embodiment of the present application. As shown in FIG8 , for example, the MAC CE includes N C fields, N S fields, and at least one reserved field (R field); where N ≥ 1, the C field is used to indicate activation/deactivation of the secondary cell, and the S field is used to indicate activation/deactivation of the SSB of the secondary cell.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates the activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device.

In some embodiments, the _Ci field is set to a first value to indicate that the secondary cell with the secondary cell index i is activated, and/or the _Ci field is set to a second value to indicate that the secondary cell with the secondary cell index i is deactivated.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Si domain indicates the SSB activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Si domain is ignored by the terminal device.

In some embodiments, the _Si domain is set to a first value (for example, the first value is 1), indicating that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is activated, and/or, the _Si domain is set to a second value (for example, the second value is 0), indicating that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is deactivated.

For example, the meanings of the C field, S field, and R field in Figure 8 may be as follows:

_Ci : If there is a secondary cell configured by the MAC entity, the secondary cell index (SCellIndex) is i, and the _Ci field indicates the activation/deactivation status of the secondary cell with the secondary cell index (SCellIndex) i. If the secondary cell is not configured, the terminal device ignores the _Ci field. If the _Ci field is set to 1, it indicates that the secondary cell index (SCellIndex) is i. The secondary cell with (SCellIndex) i is activated, and the _Ci field is set to 0, indicating that the secondary cell with the secondary cell index (SCellIndex) i is deactivated;

S _i : If there is a secondary cell configured by the MAC entity, the secondary cell index (SCellIndex) is i, and the S _i field indicates the activation/deactivation status of the SSB of the secondary cell with the secondary cell index (SCellIndex) i. If the secondary cell is not configured, the terminal device ignores the S _i field. If the S _i field is set to 1, it indicates that the SSB of the secondary cell with the secondary cell index (SCellIndex) i is activated. If the S _i field is set to 0, it indicates that the SSB of the secondary cell with the secondary cell index (SCellIndex) i is deactivated;

R: Reserved bit, set to 0.

In some embodiments, the MAC CE is a newly defined MAC CE, including multiple _Ci fields, multiple _Pix fields, and at least one reserved field; the _Ci field indicates that the MAC CE is used for secondary cell activation/deactivation, and the _Pix field indicates that the MAC CE is used for activation/deactivation of one SSB in the SSB configuration of the secondary cell. This MAC CE may be referred to as a fourth MAC CE (MAC CE 4) hereinafter.

FIG9 is a schematic diagram of a MAC CE according to an embodiment of the present application. As shown in FIG9 , for example, the MAC CE includes N C fields, N*M P fields, and at least one reserved field (R-field), where N ≥ 1 and M ≥ 1. The C field is used to indicate activation/deactivation of the secondary cell, and the P field is used to indicate activation/deactivation of one SSB in multiple SSB configurations of the secondary cell.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates the activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device.

In some embodiments, the _Ci field is set to a first value (for example, the first value is 1), indicating that the secondary cell with the secondary cell index i is activated, and/or, the _Ci field is set to a second value (for example, the second value is 0), indicating that the secondary cell with the secondary cell index i is deactivated.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Pix field indicates the xth SSB activation/deactivation configured for the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Pix field is ignored by the terminal device.

In some embodiments, the _Pix field is set to a first value (e.g., the first value is 1), indicating that the x-th synchronization signal block (SSB) configuration of the secondary cell with secondary cell index i is activated, and/or the _Pix field is set to a second value (e.g., the second value is 0), indicating that the x-th synchronization signal block (SSB) configuration of the secondary cell with secondary cell index i is deactivated. N≥i≥1, M≥x≥1.

For example, the meanings of the C field, P field, and R field in FIG9 may be as follows:

_Ci : If there is a secondary cell configured by the MAC entity, the secondary cell index (SCellIndex) is i, and the _Ci field indicates the activation/deactivation status of the secondary cell with the secondary cell index (SCellIndex) i. If the secondary cell is not configured, the terminal device ignores the _Ci field. If the _Ci field is set to 1, it indicates that the secondary cell with the secondary cell index (SCellIndex) i is activated. If the _Ci field is set to 0, it indicates that the secondary cell with the secondary cell index (SCellIndex) i is deactivated.

_Pix : If there is a secondary cell configured by the MAC entity, the secondary cell index (SCellIndex) is i, and the _Pix field indicates the activation/deactivation status of the x-th SSB configuration of the secondary cell with the secondary cell index (SCellIndex) i. If the secondary cell is not configured, the terminal device ignores the _Pix field. If the _Pix field is set to 1, it indicates that the x-th SSB configuration of the secondary cell with the secondary cell index (SCellIndex) i is activated. If the _Pix field is set to 0, it indicates that the x-th SSB configuration of the secondary cell with the secondary cell index (SCellIndex) i is deactivated.

R: Reserved bit, set to 0.

The above is a schematic description of the MAC CE of the embodiment of the present application, and the SSB configuration is described below.

In some embodiments, the terminal device receives one or more synchronization signal block (SSB) configurations from the network device. The SSB configuration can be sent by RRC signaling, and the network device can configure at least one SSB configuration for the terminal device. For example, the SIB1 of the primary cell or the RRC reconfiguration message contains at least one SSB configuration; for another example, the secondary cell configuration information (SCellConfig->sCellConfigCommon:servingCellConfigCommon) contains at least one SSB configuration, and/or contains an SSB configuration list. The at least one SSB configuration of the primary cell or the secondary cell configuration includes the SSB configuration in the existing protocol and the SSB configuration supported and/or enhanced by Rel-19NES, wherein at least one SSB configuration has a default SSB, and the default configuration is the SSB configuration of the existing protocol or the configuration of not transmitting SSB (non-SSB), and/or the SSB configuration in the existing protocol is the default SSB, and the at least one SSB configuration is the SSB configuration supported and/or enhanced by Rel-19NES.

In some embodiments, the SSB configuration includes at least one of the following: an SSB period, an SSB time domain position indication, an SSB subframe/half-frame index/offset or an SSB time offset, an SSB frequency, an SSB subcarrier spacing, an SSB power, an SSB duration, the number of SSBs, and an SSB transmission timer. The present application is not limited thereto and may also include other parameters.

For example, an SSB configuration contains at least one of the following information:

--SSB time domain position indication parameter, or SSB beam/spatial indication parameter, or SSB activation indication parameter within SS-burst. The parameter can reuse parameter ssb-PositionsInBurst, or define a new parameter, such as ssb-PositionsInBurst-r19. The parameter is used to indicate the time domain position parameter of the SSB transmitted in the SS-burst, or to indicate whether the SS is activated/triggered within the SSB burst. This parameter enables the management/adjustment of SSB per beam. For example, if the parameter ssb-PositionsInBurst = 10000000, only the SSB corresponding to Beam0 is activated in the SSB burst, thereby implementing per-beam SSB management/adjustment.

--SSB period parameter, which is used to indicate the period of SSB. The parameter ssb-periodicityServingCell can be reused or a new parameter can be defined, such as ssb-Periodicity-r19;

--SSB frequency-related parameters, which are used to indicate the SSB frequency. The parameter absoluteFrequencySSB can be reused or a new parameter can be defined, such as ssbFrequency-r19;

--SSB subcarrier spacing related parameters, which are used to indicate the SSB subcarrier spacing. The parameter ssb-SubcarrierOffset can be reused, or a new parameter can be defined, such as ssb-SubcarrierOffset-r19;

--SSB subframe/half-frame index/offset or SSB time offset parameter, which is used to indicate whether the SSB is the first half-frame or the second half-frame, and/or indicates the subframe offset of the SSB, and/or indicates the time offset relative to SFN0slot0, and/or indicates the SFN offset.

--SSB duration/SSB number parameter, which is used to indicate the number of SSB cycles or the duration of the SSB. For example, the SSB cycle duration/SSB cycle number parameter is used to indicate the current SSB duration, and/or the number of SSBs, and/or the number of SSB cycles. For another example, if this parameter is present in the SSB configuration, it means that the SSB lasts for the parameter duration. If this parameter is absent, it means that the SSB is sent periodically.

--SSB transmission timer, the parameter is a timer used to indicate whether SSB is transmitted. Normal operation of the timer indicates SSB transmission, and timer expiration indicates that SSB stops transmitting. For example, the SSB transmission timer is used to indicate the duration of SSB transmission. During normal operation of the SSB transmission timer, the UE assumes/assumes that the serving cell transmits the SSB configured by the SSB; after the SSB transmission timer times out, the UE assumes/assumes that the serving cell does not transmit the SSB configured by the SSB; for another example, the terminal assumes/assumes that the SSB configuration is configured by high-level parameters and the timer starts running when it is activated.

The above schematically illustrates the various parameters of the SSB configuration, but the present application is not limited thereto. The SSB configuration may include one of the above parameters, or any combination of two or more parameters, and so on. The parameters in the SSB configuration may represent the SSB configuration. For example, if the terminal device receives two SSB cycle parameters, one SSB cycle parameter represents one SSB configuration, indicating that the terminal device has received two SSB configurations.

For example, the terminal device receives secondary cell addition/modification configuration information (IE sCellToAddModList), and the SCell addition/modification configuration information includes SSB configuration related information; the terminal device is configured with a secondary cell addition/modification configuration IE sCellToAddModList, and the sCellToAddModList includes an SCellConfig IE, and the SCellConfig IE includes a ServingCellConfigCommon IE, and the ServingCellConfigCommon IE includes SSB configuration related parameters, such as ssb-PositionsInBurst, and/or, ssb-periodicityServingCell, and/or, ssbSubcarrierSpacing, and/or, ssb-PositionQCL-r16.

For another example, the secondary cell addition/modification configuration information may include one SSB configuration, and the secondary cell addition/modification configuration information may also include multiple SSB configurations. One SSB configuration includes the above parameters. For example, the secondary cell addition/modification configuration information includes 2 SSB period parameters, indicating that the secondary cell includes 2 SSB configurations.

The above is a schematic description of the SSB configuration. The following describes the indication/activation/triggering of the SSB configuration.

In some embodiments, the terminal device receives a MAC CE of an embodiment of the present application (for example, any one of the first to fourth MAC CEs mentioned above), and the MAC CE is used to indicate the activation and deactivation of one SSB configuration among multiple SSB configurations configured in the secondary cell, and/or the terminal device performs corresponding measurements and/or synchronization operations based on the activated SSB.

In some embodiments, the secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE) is used to activate/deactivate the SSB of the secondary cell.

For example, at time T0, the terminal device receives secondary cell addition/modification configuration information, where the secondary cell addition/configuration message includes SSB configuration information of the secondary cell. The terminal device assumes that the current secondary cell does not transmit SSB.

For example, at time T1 (T1>T0), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 1. The terminal device determines that the current MAC CE is used for SSB activation/deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 1, indicating that the SSB of the secondary cell is activated; the terminal device confirms that the SSB is transmitted on the secondary cell from the receipt of the MAC CE, and the SSB configuration information is obtained from the aforementioned secondary cell addition/modification configuration information; the terminal device performs measurement and/or synchronization operations based on the activated SSB, and the terminal device confirms that the secondary cell is in a deactivated/inactivated state at the current moment, and the SSB of the secondary cell is in an activated state. The MAC CE at the current moment is used to activate the SSB of the secondary cell, not for activating the secondary cell.

For example, at time T2 (T2>T1), the terminal receives the secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), the reserved field (R field) contained in the MAC CE is set to 0, and the terminal device determines that the current MAC CE is used for activation and deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 1, indicating that the secondary cell is activated, and the MAC CE at the current moment is used to activate the secondary cell.

For example, at time T3 (T3>T2), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation and deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 0. The terminal device determines that the MAC CE is used for activation and deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 0, indicating that the current secondary cell is deactivated, and the MAC CE at the current moment is used to deactivate the secondary cell.

For example, at time T4 (T4>T3), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation and deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 1. The terminal device determines that the current MAC CE is used for activation and deactivation of the SSB of the secondary cell; the field corresponding to a certain secondary cell ID is set to 0, indicating that the SSB of the secondary cell is deactivated; the terminal device confirms that the SSB is not transmitted on the secondary cell from the time of receiving the MAC CE, and the terminal device stops measurement and/or synchronization operations.

In some embodiments, the secondary cell activation/deactivation MAC CE is used to activate/deactivate the SSB of the secondary cell.

For example, at time T0, the terminal device receives secondary cell addition/modification configuration information, and the secondary cell addition/configuration message includes SSB configuration information of the secondary cell. The terminal assumes that the current secondary cell does not transmit SSB at the current moment.

For example, at time T1 (T1>T0), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 1, and the terminal device determines that the MAC CE is used for activation/deactivation of the SSB of the secondary cell; the field corresponding to a certain secondary cell ID is set to 1, indicating that the SSB of the secondary cell is activated; the terminal device confirms that the SSB is transmitted on the secondary cell from the receipt of the MAC CE, and the SSB configuration information is obtained from the aforementioned secondary cell addition/modification configuration information; the terminal device performs measurement and/or synchronization operations based on the activated SSB, and the terminal device confirms that the secondary cell is in a deactivated/inactivated state at the current moment, and the SSB of the secondary cell is in an activated state, and the MAC CE is used to activate the SSB of the secondary cell at the current moment, not for activating the secondary cell.

For example, at time T2 (T2>T1), the terminal receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 0. The terminal device determines that the MAC CE is used for activation/deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 1, indicating that the secondary cell is activated, and the MAC CE at the current moment is used to activate the secondary cell.

For example, at time T3 (T3>T2), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 0. The terminal device determines that the MAC CE is used for activation/deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 0, indicating that the secondary cell is deactivated, and at the same time, indicating that the SSB of the current secondary cell is deactivated, and the terminal device stops measurement and/or synchronization operations.

In some embodiments, a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE) is used to activate/deactivate the SSB of the secondary cell.

For example, at time T0, the terminal device receives secondary cell addition/modification configuration information, the secondary cell addition/configuration message includes SSB configuration information of the secondary cell, and the terminal device determines/assumes that the current secondary cell does not transmit SSB.

For example, at time T1 (T1>T0), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 0. The terminal device determines that the MAC CE is used for activation/deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 1, indicating that the secondary cell is activated, and at the same time, indicating that the SSB of the secondary cell is activated, and the terminal device performs measurement and/or synchronization operations based on the activated SSB.

For example, at time T2 (T2>T1), the terminal device receives a secondary cell activation/deactivation MAC CE (or enhanced secondary cell activation/deactivation MAC CE), and the reserved field (R field) contained in the MAC CE is set to 0. The terminal device determines that the MAC CE is used for activation and deactivation of the secondary cell; the field corresponding to a certain secondary cell ID is set to 0, indicating that the secondary cell is deactivated, and at the same time, indicating that the SSB of the secondary cell is deactivated, and the terminal device stops measurement and/or synchronization operations.

The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

It can be seen from the above embodiments that in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can quickly and flexibly adjust SSB transmission, which can not only improve network gain (such as energy-saving gain) but also ensure normal transmission of terminal equipment.

Embodiments of the second aspect

The embodiment of the present application provides an activation/indication/triggering method for a synchronization signal block, which is described from the perspective of a network device. The embodiment of the second aspect can be combined with the embodiment of the first aspect, and the same contents as the embodiment of the first aspect will not be repeated.

FIG10 is a schematic diagram of a method for triggering a synchronization signal block according to an embodiment of the present application. As shown in FIG10 , the method includes:

1002. The network device sends a MAC CE to the terminal device; the MAC CE is used to activate/deactivate the secondary cell and/or activate/deactivate the synchronization signal block (SSB) of the secondary cell.

In some embodiments, as shown in FIG10 , the method may further include:

1001, a terminal device receives one or more synchronization signal block (SSB) configurations from a network device;

In some embodiments, as shown in FIG10 , the method may further include:

1003. The terminal device performs measurement and/or synchronization based on the synchronization signal block (SSB) of the activated secondary cell.

It is worth noting that FIG10 above is only a schematic illustration of the embodiment of the present application, but the present application is not limited to For example, the execution order of each operation can be appropriately adjusted, and other operations can be added or some operations can be reduced. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of Figure 10 above.

In some embodiments, the network device may send N SSB configurations and activate one of the N SSB configurations through the same RRC signaling. In other embodiments, the network device may send N SSB configurations through one RRC signaling and activate one of the N SSB configurations through another RRC signaling.

In some embodiments, the network device may send N SSB configurations through one RRC signaling and activate one of the N SSB configurations through MAC CE. In other embodiments, the network device may send N SSB configurations through one RRC signaling and activate one of the N SSB configurations through DCI.

In some embodiments, the network device may send N SSB configurations through an RRC signaling, activate M of the N SSB configurations through MAC CE, and indicate one of the M activated SSB configurations through DCI.

The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

It can be seen from the above embodiments that in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can quickly and flexibly adjust SSB transmission, which can not only improve network gain (such as energy-saving gain) but also ensure normal transmission of terminal equipment.

Embodiments of the third aspect

The embodiment of the present application provides an activation/indication/triggering device for a synchronization signal block. The device may be, for example, a terminal device, or one or more components or assemblies configured on the terminal device, and the same contents as those in the embodiment of the first aspect are not repeated here.

FIG11 is a schematic diagram of a triggering device for a synchronization signal block according to an embodiment of the present application. As shown in FIG11 , the triggering device 1100 for a synchronization signal block includes:

a receiving unit 1101 for receiving a MAC CE from a network device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or

The processing unit 1102 performs measurement and/or synchronization based on a synchronization signal block (SSB) of the activated secondary cell.

In some embodiments, as shown in FIG11 , the triggering device 1100 of the synchronization signal block may further include:

The sending unit 1103 sends feedback information, such as measurement information and/or synchronization information, to the network device.

In some embodiments, the receiving unit 1101 further receives one or more synchronization signals from the network device. Block (SSB) configuration.

In some embodiments, the MAC CE includes at least a plurality of _Ci fields and at least one reserved field; the reserved field is set to a predetermined value.

In some embodiments, the MAC CE is a secondary cell activation/deactivation MAC CE or an enhanced secondary cell activation/deactivation MAC CE; the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 _Ci domains and 1 reserved domain, or the secondary cell activation/deactivation MAC CE includes at least 31 _Ci domains and 1 reserved domain.

In some embodiments, the _Ci field is set to a first value, indicating that the secondary cell with a secondary cell index of i is activated, and/or the terminal device assumes that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with a secondary cell index of i is activated.

In some embodiments, the _Ci field is set to a second value, indicating that the secondary cell with the secondary cell index i is deactivated, and/or the terminal device assumes that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is deactivated.

In some embodiments, the MAC CE includes at least multiple _Ci fields and at least one reserved field; the reserved field indicates whether the MAC CE is used for secondary cell activation/deactivation, and/or the reserved field indicates whether the MAC CE is used for SSB activation/deactivation of the secondary cell.

In some embodiments, the MAC CE is a secondary cell activation/deactivation MAC CE or an enhanced secondary cell activation/deactivation MAC CE; the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 _Ci domains and 1 reserved domain, or the secondary cell activation/deactivation MAC CE includes at least 31 _Ci domains and 1 reserved domain.

In some embodiments, the reserved field is set to a first value, indicating that the MAC CE is used for secondary cell activation/deactivation, and/or, the MAC CE is used for SSB activation/deactivation of the secondary cell.

In some embodiments, the reserved field is set to a second value, indicating that the MAC CE is used for secondary cell activation/deactivation, and/or, the MAC CE is used for SSB activation/deactivation of the secondary cell.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates the SSB activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device.

In some embodiments, the _Ci field is set to a first value, indicating that a synchronization signal block (SSB) or an on-demand synchronization signal block (on-demand SSB) of a secondary cell with a secondary cell index i is activated.

In some embodiments, the _Ci field is set to the second value to indicate the synchronization of the secondary cell with the secondary cell index i. The signal block (SSB) or the on-demand SSB is deactivated.

In some embodiments, the MAC CE includes an LCID or an eLCID;

The code point or index of the LCID is 57 or 58, or the code point of the eLCID is 231 or 232, and the index of the eLCID is 295 or 296,

Alternatively, the code point or index of the LCID is greater than or equal to 35 and less than or equal to 46, or the code point of the eLCID is greater than or equal to 0 and less than or equal to 226, and the index of the eLCID is greater than or equal to 64 and less than or equal to 289.

In some embodiments, the MAC CE includes multiple _Ci fields, multiple _Si fields and at least one reserved field; the _Ci field indicates that the MAC CE is used for secondary cell activation/deactivation, and the _Si field indicates that the MAC CE is used for SSB activation/deactivation of the secondary cell.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates the activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device.

In some embodiments, the _Ci field is set to a first value, indicating that the secondary cell with the secondary cell index i is activated.

In some embodiments, the _Ci field is set to the second value, indicating that the secondary cell with the secondary cell index i is deactivated.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Si domain indicates the SSB activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Si domain is ignored by the terminal device.

In some embodiments, the _Si field is set to a first value, indicating that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is activated.

In some embodiments, the _Si field is set to a second value, indicating that the synchronization signal block (SSB) or on-demand synchronization signal block (on-demand SSB) of the secondary cell with the secondary cell index i is deactivated.

In some embodiments, the MAC CE includes multiple _Ci fields, multiple _Pix fields and at least one reserved field; the _Ci field indicates that the MAC CE is used for secondary cell activation/deactivation, and the _Pix field indicates that the MAC CE is used for one SSB activation/deactivation in the SSB configuration of the secondary cell.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates the activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device.

In some embodiments, the _Ci field is set to a first value, indicating that the secondary cell with the secondary cell index i is activated.

In some embodiments, the _Ci field is set to the second value, indicating that the secondary cell with the secondary cell index i is deactivated.

In some embodiments, if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Pix field indicates the xth SSB activation/deactivation of the secondary cell with a secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Pix field is ignored by the terminal device.

In some embodiments, the _Pix field is set to a first value, indicating that the xth synchronization signal block (SSB) configuration of the secondary cell with the secondary cell index i is activated.

In some embodiments, the _Pix field is set to a second value, indicating that the xth synchronization signal block (SSB) configuration of the secondary cell with the secondary cell index i is deactivated.

It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The triggering device 1100 of the synchronization signal block may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

In addition, for the sake of simplicity, FIG11 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

Through the embodiments of the present application, in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal devices can quickly and flexibly adjust SSB transmission, which can not only improve network gain (such as energy-saving gain) but also ensure normal transmission of terminal devices.

Embodiments of the fourth aspect

The embodiment of the present application provides an activation/indication/triggering device for a synchronization signal block. The device may be, for example, a network device, or one or more components or assemblies configured on the network device, and the contents identical to those of the first and second aspects are not repeated here.

FIG12 is a schematic diagram of a triggering device for a synchronization signal block according to an embodiment of the present application. As shown in FIG12 , the triggering device 1200 for the synchronization signal block includes:

The sending unit 1201 sends a MAC CE to the terminal device; the MAC CE is used to activate/deactivate the secondary cell and/or activate/deactivate the synchronization signal block (SSB) of the secondary cell.

In some embodiments, the sending unit 1201 also sends one or more synchronization signal block (SSB) configurations to the terminal device.

In some embodiments, as shown in FIG12 , the triggering device 1200 of the synchronization signal block may further include:

The receiving unit 1202 receives feedback information from the terminal device.

It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The triggering device 1200 of the synchronization signal block may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

In addition, for the sake of simplicity, FIG12 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

Through the embodiments of the present application, in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal devices can quickly and flexibly adjust SSB transmission, which can not only improve network gain (such as energy-saving gain) but also ensure normal transmission of terminal devices.

Embodiments of the fifth aspect

An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

In some embodiments, the communication system 100 may include at least:

A network device sends a MAC CE to a terminal device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell;

A terminal device performs measurement and/or synchronization based on the activated synchronization signal block (SSB) of the secondary cell.

The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

Figure 13 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 13 , terminal device 1300 may include a processor 1310 and a memory 1320. Memory 1320 stores data and programs and is coupled to processor 1310. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

For example, the processor 1310 may be configured to execute a program to implement the method for triggering a synchronization signal block as described in the embodiment of the first aspect. For example, the processor 1310 may be configured to perform the following control: receiving a MAC CE from a network device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell, and/or perform measurement and/or synchronization based on the activated synchronization signal block (SSB) of the secondary cell.

As shown in FIG13 , the terminal device 1300 may further include: a communication module 1330, an input unit 1340, a display 1350, and a power supply 1360. The functions of the above components are similar to those of the prior art and will not be described in detail here. It should be noted that the terminal device 1300 does not necessarily have to include all the components shown in Figure 13, and the above components are not necessary; in addition, the terminal device 1300 may also include components not shown in Figure 13, and reference may be made to the prior art.

An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

Figure 14 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 14 , network device 1400 may include a processor 1410 (e.g., a central processing unit (CPU)) and a memory 1420 ; the memory 1420 is coupled to the processor 1410 . The memory 1420 may store various data and may also store an information processing program 1430 , which is executed under the control of the processor 1410 .

For example, the processor 1410 may be configured to execute a program to implement the method for triggering a synchronization signal block as described in the embodiment of the second aspect. For example, the processor 1410 may be configured to perform the following control: sending a MAC CE to a terminal device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell.

In addition, as shown in FIG14 , network device 1400 may further include: a transceiver 1440 and an antenna 1450, etc.; wherein, the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that network device 1400 does not necessarily include all the components shown in FIG14 ; in addition, network device 1400 may also include components not shown in FIG14 , and reference may be made to the prior art for details.

An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the activation/indication/triggering method of the synchronization signal block described in the embodiment of the first aspect.

An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the method for activating/indicating/triggering the synchronization signal block described in the embodiment of the first aspect.

An embodiment of the present application also provides a computer program, wherein when the program is executed in a network device, the program enables the network device to execute the activation/indication/triggering method of the synchronization signal block described in the embodiment of the second aspect.

An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables the network device to execute the activation/indication/triggering method of the synchronization signal block described in the embodiment of the second aspect.

The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

The method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and/or one or more groups of functional block diagrams The above diagrams may correspond to software modules or hardware modules in a computer program flow. These software modules may correspond to the steps shown in the diagram. These hardware modules may be implemented by solidifying these software modules using a field programmable gate array (FPGA), for example.

The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

One or more of the functional blocks and/or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and/or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

1. A method for activating/indicating/triggering a synchronization signal block (SSB), comprising:

The terminal device receives a MAC CE from a network device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block (SSB) of the secondary cell; and/or

The terminal device performs measurement and/or synchronization based on the activated synchronization signal block (SSB) of the secondary cell.

2. A method for activating/indicating/triggering a synchronization signal block (SSB), comprising:

The network device sends a MAC CE to the terminal device; the MAC CE is used to activate/deactivate the secondary cell and/or activate/deactivate the synchronization signal block (SSB) of the secondary cell.

3. A terminal device comprising a memory and a processor, wherein the memory stores a computer program and the processor The device is configured to execute the computer program to implement the activation/indication/triggering method of the synchronization signal block as described in Note 1.

4. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the activation/indication/triggering method of the synchronization signal block as described in Note 2.

5. A computer program product, comprising at least a computer program, which, when executed by a processor, enables a terminal device to execute the method for activating/indicating/triggering a synchronization signal block as described in Note 1.

6. A computer program product, comprising at least a computer program, which, when executed by a processor, enables a network device to execute the method for activating/indicating/triggering a synchronization signal block as described in Note 2.

Claims (20)

A triggering device for a synchronization signal block, comprising: a receiving unit configured to receive a MAC CE from a network device; the MAC CE being used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block of the secondary cell; and/or A processing unit performs measurement and/or synchronization based on the activated synchronization signal block of the secondary cell. The apparatus according to claim 1, wherein the receiving unit receives one or more synchronization signal block configurations from the network device. The apparatus according to claim 1, wherein the MAC CE comprises at least a plurality of _Ci fields and at least one reserved field; the reserved field is set to a predetermined value. The apparatus according to claim 3, wherein the MAC CE is a secondary cell activation/deactivation MAC CE or an enhanced secondary cell activation/deactivation MAC CE; the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 Ci _fields and 1 reserved field, or the secondary cell activation/deactivation MAC CE includes at least 31 _Ci fields and 1 reserved field. The device according to claim 3, wherein The _Ci field is set to the first value, indicating that the secondary cell with the secondary cell index i is activated, and/or the terminal device assumes that the synchronization signal block or the on-demand synchronization signal block of the secondary cell with the secondary cell index i is activated; and/or The _Ci field being set to the second value indicates that the secondary cell with the secondary cell index i is deactivated, and/or the terminal device assumes that the synchronization signal block or on-demand synchronization signal block of the secondary cell with the secondary cell index i is deactivated. The apparatus according to claim 1, wherein the MAC CE includes at least multiple Ci _fields and at least one reserved field; the reserved field indicates whether the MAC CE is used for secondary cell activation/deactivation, and/or the reserved field indicates whether the MAC CE is used for SSB activation/deactivation of the secondary cell. The apparatus according to claim 6, wherein the MAC CE is a secondary cell activation/deactivation MAC CE or an enhanced secondary cell activation/deactivation MAC CE; the secondary cell activation/deactivation MAC CE or the enhanced secondary cell activation/deactivation MAC CE includes at least 7 Ci _fields and 1 reserved field, or the secondary cell activation/deactivation MAC CE includes at least 31 _Ci fields and 1 reserved field. The device according to claim 6, wherein The reserved field is set to a first value, indicating that the MAC CE is used for activation/deactivation of a secondary cell, and/or the MAC CE is used for activation/deactivation of an SSB of a secondary cell; and/or The reserved field is set to a second value, indicating that the MAC CE is used for secondary cell activation/deactivation, and/or, the MAC CE is used for SSB activation/deactivation of the secondary cell. The apparatus according to claim 6, wherein if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates SSB activation/deactivation of the secondary cell with the secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device; The _Ci field is set to the first value, indicating that the synchronization signal block or the on-demand synchronization signal block of the secondary cell with the secondary cell index i is activated; and/or The _Ci field being set to the second value indicates that the synchronization signal block or the on-demand synchronization signal block of the secondary cell with the secondary cell index i is deactivated. The apparatus according to claim 1, wherein the MAC CE comprises an LCID or an eLCID; The code point or index of the LCID is 57 or 58, or the code point of the eLCID is 231 or 232, and the index of the eLCID is 295 or 296, Alternatively, the code point or index of the LCID is greater than or equal to 35 and less than or equal to 46, or the code point of the eLCID is greater than or equal to 0 and less than or equal to 226, and the index of the eLCID is greater than or equal to 64 and less than or equal to 289. The apparatus according to claim 1, wherein the MAC CE includes multiple _Ci fields, multiple _Si fields, and at least one reserved field; the _Ci field indicates that the MAC CE is used for secondary cell activation/deactivation, and the _Si field indicates that the MAC CE is used for SSB activation/deactivation of the secondary cell. The apparatus according to claim 11, wherein if the MAC entity is configured with a secondary cell with a secondary cell index of i, the _Ci field indicates activation/deactivation of the secondary cell with the secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device; The _Ci field is set to the first value, indicating that the secondary cell with the secondary cell index i is activated; and/or The _Ci field being set to the second value indicates that the secondary cell with the secondary cell index i is deactivated. The apparatus according to claim 11, wherein if the MAC entity is configured with a secondary cell with a secondary cell index of i, the S _i field indicates SSB activation/deactivation of the secondary cell with the secondary cell index of i; if the MAC entity is not configured with a secondary cell with a secondary cell index of i, the S _i field is ignored by the terminal device; The _Si field is set to the first value to indicate the synchronization signal block of the secondary cell with secondary cell index i or the on-demand synchronization signal block of the secondary cell with secondary cell index i. The signal block is activated; and/or The _Si field being set to the second value indicates that the synchronization signal block or the on-demand synchronization signal block of the secondary cell with the secondary cell index i is deactivated. The apparatus according to claim 1, wherein the MAC CE includes multiple _Ci fields, multiple _Pix fields, and at least one reserved field; the _Ci field indicates that the MAC CE is used for secondary cell activation/deactivation, and the _Pix field indicates that the MAC CE is used for one SSB activation/deactivation in the SSB configuration of the secondary cell. The apparatus according to claim 14, wherein the MAC entity is configured with a secondary cell with a secondary cell index i, and the _Ci field indicates activation/deactivation of the secondary cell with the secondary cell index i; If the MAC entity does not configure a secondary cell with a secondary cell index of i, the _Ci field is ignored by the terminal device. The device according to claim 15, wherein The _Ci field is set to the first value, indicating that the secondary cell with the secondary cell index i is activated; and/or The _Ci field being set to the second value indicates that the secondary cell with the secondary cell index i is deactivated. The apparatus according to claim 14, wherein the MAC entity is configured with a secondary cell with a secondary cell index of i, and the _Pix field indicates the xth SSB activation/deactivation of the secondary cell with the secondary cell index of i; If the MAC entity does not configure a secondary cell with a secondary cell index of i, the _Pix field is ignored by the terminal device. The device according to claim 17, wherein The _Pix field is set to the first value, indicating that the x-th synchronization signal block configuration of the secondary cell with the secondary cell index i is activated; and/or The _Pix field being set to the second value indicates that the x-th synchronization signal block configuration of the secondary cell with the secondary cell index i is deactivated. A triggering device for a synchronization signal block, comprising: A sending unit, which sends a MAC CE to a terminal device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block of the secondary cell. A communication system comprising: A network device that sends a MAC CE to a terminal device; the MAC CE is used to activate/deactivate a secondary cell and/or activate/deactivate a synchronization signal block of the secondary cell; A terminal device performs measurement and/or synchronization based on the activated synchronization signal block of the secondary cell.