Patent Application
20240163803
This application pertains to the field of communications technologies, and specifically relates to a node state control method and apparatus and a related device.
In the communications field, some nodes may establish a wireless connection to a base station, and receive a control command from the base station. For example, an intelligent signal amplifier may establish a wireless connection to the base station, and receive a control command from the base station. The intelligent signal amplifier serves as a transponder that expands coverage of a cell and enhances strength of a wireless signal, and can expand a coverage area of and enhance strength of a useful signal.
However, when there is no service or few services within a coverage area of the intelligent signal amplifier, the intelligent signal amplifier keeps in a forwarding state, causing a large waste of power. In other words, in the prior art, a node lacks flexibility in state switching.
According to a first aspect, a node state control method is provided, including:
According to a second aspect, a node state control method is provided, including:
According to a third aspect, a node state control apparatus is provided, including:
According to a fourth aspect, a node state control apparatus is provided, including:
According to a fifth aspect, a node is provided, including a processor, a memory, and a program or an instruction that is stored in the memory and that can be run on the processor, and when the program or the instruction is executed by the processor, steps of the node state control method according to the first aspect are implemented.
According to a sixth aspect, a network side device is provided, including a processor, a memory, and a program or an instruction that is stored in the memory and that can be run on the processor, and when the program or the instruction is executed by the processor, steps of the node state control method according to the second aspect are implemented.
According to a seventh aspect, a readable storage medium is provided. The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by a processor, steps of the node state control method according to the first aspect or the second aspect are implemented.
According to an eighth aspect, a chip is provided. The chip includes a processor and a communications interface, the communications interface is coupled to the processor, and the processor is configured to run a program or an instruction of a network side device to implement the node state control method according to the first aspect or the second aspect.
According to a ninth aspect, a computer program product is provided. The computer program product is stored in a non-transient storage medium. The computer program product is executed by at least one processor to implement the node state control method according to the first aspect or the second aspect.
According to a tenth aspect, a communications device is provided, and is configured to perform the node state control method according to the first aspect or the second aspect.
The following clearly describes technical solutions in embodiments of this application with reference to accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of this application shall fall within the protection scope of this application.
The terms “first”, “second”, and the like in this specification and claims of this application are used to distinguish between similar objects instead of describing a specific order or sequence. It should be understood that, data termed in such a way is interchangeable in proper circumstances, so that the embodiments of this application can be implemented in an order other than the order illustrated or described herein. Objects classified by “first” and “second” are usually of a same type, and a quantity of objects is not limited. For example, there may be one or more first objects. In addition, in the specification and the claims, “and/or” represents at least one of connected objects, and the character “/” generally represents an “or” relationship between associated objects. In this application, ‘transmit’ indicates signal transmission, and is not signal transmission in a narrow sense.
It should be noted that, the technologies described in the embodiments of this application are not limited to a Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, and can also be used in other wireless communications systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and another system. The terms “system” and “network” in the embodiments of this application may be used interchangeably. The technologies described can be applied to both the systems and the radio technologies mentioned above as well as to other systems and radio technologies. However, a New Radio (NR) system is described below as an example, and the term NR is used in most of the descriptions, although these technologies can also be used in an application other than an application of the NR system, for example, a sixth (6th Generation, 6G) communication system.
A node state control method provided in the embodiments of this application will be described in detail below by using specific embodiments and application scenarios with reference to the accompanying drawings.
Step 201: A node obtains target information, where the node includes a mobile termination (MT) module and a radio frequency module.
The node may be an intelligent signal amplifier node (referred to as an intelligent signal amplifier for short below) or an integrated access and backhaul (TAB) node.
The intelligent signal amplifier includes the MT module and the radio frequency module. The MT module may also be referred to as an MT function or an MT function module. The radio frequency module may also be referred to as a radio frequency function module, a radio frequency (RF) module, or a radio unit (RU) module. The MT module is configured to establish a connection to a network side device, and the network side device may be a base station. It should be noted that the network side device is not limited to the base station. In this application, the base station is used as an example for description, but this does not constitute a limitation on the network side device. The base station interacts with the intelligent signal amplifier by using the MT module, to configure a sending parameter of the intelligent signal amplifier.
For the TAB node, the radio frequency module may also be referred to as a distributed unit (DU) function, and the TAB node includes an MT function and a DU function. The DU function enables the TAB node to provide a wireless access function for a child node or user equipment (UE) like a base station, and the MT function enables the TAB node to be controlled and scheduled by a parent node like the UE.
Step 202: The node switches to a target state based on the target information, where the target state includes at least one of a state of the MT module and a state of the radio frequency module.
The target information may be indication information sent by the network side device, or may be a predefined parameter or a preconfigured parameter. There are two manners of triggering node switching: One manner is that the node is indicated based on indication information sent by the base station to switch a state, and the other manner is that the node performs autonomous state switching based on at least one of the predefined parameter and the preconfigured parameter. In other words, the target information may include at least one of the following:
In the foregoing descriptions, the node may switch a state of the node to the target state based on the target information. For example, if the node is not scheduled for forwarding in a preset time period, the state of the node may be switched to a fully-off state, a partially-on state, a partial working state, or a discontinuous working state, to reduce power consumption.
For example, when the intelligent signal amplifier works, the intelligent signal amplifier amplifies an interference signal from a neighboring cell that interferes with UE and a base station of a current cell, and sends a secondary lobe from the current cell to the neighboring cell to interfere with UE and a base station of the neighboring cell. If there is no service or few services in a coverage area of the intelligent signal amplifier, the intelligent signal amplifier may be in an off state or a partially off state, thereby effectively reducing interference caused by the intelligent signal amplifier and reducing power consumption of the intelligent signal amplifier. When the intelligent signal amplifier needs to work, the intelligent signal amplifier is switched to a fully-open state through state switching.
In this embodiment, the node obtains the target information, where the node includes the MT module and the radio frequency module; and the node switches to the target state based on the target information, where the target state includes at least one of the state of the MT module and the state of the radio frequency module. The node can switch a state of the node based on the target information, thereby improving flexibility of node state switching.
In the foregoing descriptions, the target information is indicated by using Radio Resource Control (RRC) signaling, Media Access Control (MAC) control element (CE) signaling, signaling carried by a physical downlink control channel (PDCCH), or a backhaul adaptation protocol (BAP) control protocol data unit (PDU).
In this application, an intelligent signal amplifier is used as an example for description. It should be noted that, an implementation applicable to the intelligent signal amplifier is also applicable to the IAB node.
The target state includes a fully-on state, a fully-off state, a partially-on state, a partial working state, or a discontinuous working state. In a case that both the MT module and the RF module are in an on state, the state of the node is a fully-on state.
When the node is in a fully-off state, both the MT module and the RF module are in an off state. In this state, there may be the following three sub-states. When releasing a connection to the intelligent signal amplifier, a serving base station may indicate, in a release message, that the intelligent signal amplifier is in one of the following states after releasing the connection:
The partially-on state of the node includes one of the following:
In the partially-on state, the RF module is in an off state, so that power consumption can be reduced and power can be saved.
The partial working state includes one of the following:
It should be noted that, when the node is in the partial working state, the MT module may be in an idle state, an inactive state, an on state, a DRX state, or a light sleeping state.
For example, the RF module works in an uplink slot and is in an off state in a downlink slot; and the RF module is enabled in an uplink slot and a downlink slot to work, and is in an off state in some unavailable slots. For example, when the intelligent signal amplifier is controlled by the IAB node, and some slots of a DU function of the IAB node are unavailable slots, the RF module and/or the MT module of the intelligent signal amplifier may be configured to be in an off state in the unavailable slots.
The discontinuous working state of the node includes:
The MT module detects a scheduling indicator from the base station for the RF module in on-duration of the MT module, and the RF module is also in a corresponding discontinuous working state. A cycle and an offset in which the RF module is in an on state match a cycle and an offset of the MT module. For example, in
Optionally, because there is a detection delay when the MT module detects an indicator from the base station, an offset time (time offset ≥0) may be configured between start time of the on-duration of the RF module and start time of the on-duration of the MT module. In other words, start time from which the radio frequency module in an on state may be obtained by offsetting preset time from start time from which the MT module in an on state. The preset time is greater than or equal to 0. When the preset time is equal to 0, the start time from which the radio frequency module in an on state is the same as the start time from which the MT module in an on state.
In the on-duration of the discontinuous working state of the RF module, the RF module may be in a discontinuous working state for uplink forwarding, a discontinuous working state for downlink forwarding, or a discontinuous working state for hybrid forwarding. The discontinuous working state for hybrid forwarding includes the discontinuous working state for uplink forwarding and the discontinuous working state for downlink forwarding.
The discontinuous working state of the radio frequency module is configured based on a slot bitmap or a symbol bitmap sent by the network side device. The slot bitmap or the symbol bitmap is indicated by using RRC signaling, MAC CE signaling, or signaling carried by a PDCCH. In other words, the base station may configure an on/off state of the RF module on a slot or a symbol by using the slot bitmap or the symbol bitmap indicated by RRC signaling, MAC CE signaling, or signaling carried by a PDCCH.
There are two manners of triggering node switching: One manner is that the node is indicated based on indication information sent by the base station to switch a state. For example, the base station may explicitly indicate, by using RRC signaling, MAC CE signaling, or signaling carried by a PDCCH, switching of a working state of the intelligent signal amplifier. For the IAB node, a BAP control PDU may also be used for implementation. The other manner for triggering switching is as follows: The node performs autonomous switching based on at least one of a predefined parameter and a preconfigured parameter.
For example, after the node is scheduled for forwarding by the base station last time, the node is not scheduled for forwarding again in a first preset time period, the node switches to the state described in the first or the second item of the partially-on state based on the target information, that is, switches to one of the following states:
The first preset time period is a time period that uses time at which the node is scheduled for forwarding last time as start time and whose duration is first preset duration.
Then, if the node is not scheduled for forwarding in a second preset time period, the node switches to the state described the third item in the foregoing partially-on state based on the target information, that is, the node switches to the following state:
The second preset time period may be a time period that uses end time of the first preset time period as start time and whose duration is second preset duration.
In a case that the node is in a partially-on state, if an indicator for scheduling for forwarding is received, the node exits the partially-on state to a preset working state, for example, a fully working state or a partial working state, that is, the node switches to the following state based on the target information:
A parameter of the partial working state is preconfigured by the base station, for example, a DRX state parameter of the MT module described in the second item in the partially-on state and a PDCCH (a wake-up signal (WUS)) format and a monitoring window described in the third item in the partially-on state. State switching may be indicated by using dynamic signaling, for example, by using information carried by a PDCCH and a MAC CE.
In an embodiment of this application, when the intelligent signal amplifier does not need to continue to work, the base station may release the intelligent signal amplifier to an inactive state. In this case, both the MT module and the RF module are in an off state (that is, the node is in a fully-off state), and the intelligent signal amplifier and the base station reserve context of the MT module and context of the RF module.
In the foregoing descriptions, in addition to reserving some parameters that are the same as those of common UE, for example, radio bearer configuration, bandwidth part (BWP) configuration, and power control configuration, the context of the MT module further has physical channel configuration used for transmitting signaling for controlling the RF module, such as a corresponding PDCCH format and a physical resource, and a radio network temporary identifier (RNTI) that matches the PDCCH, for example, uplink and downlink forwarding power or an amplification multiple for controlling the RF module, or a related parameter for controlling beam transmission/receiving between the RF module and the UE. In other words, the context of the MT module includes at least one of the following:
The context of the RF module includes at least one of the following:
After the intelligent signal amplifier establishes a connection to the base station in an inactive state, and receives no reconfiguration of a related parameter, the intelligent signal amplifier automatically performs subsequent state switching based on stored related parameter configuration (that is, the context of the MT module and the context of the RF module).
In an embodiment of this application, the target information includes a radio access network (RAN) side paging signal based on an inactive radio network temporary identifier (I-RNTI) sent by a network side device.
The switching, by the node, to the target state based on the target information includes:
For example, the base station may configure an I-RNTI-based paging signal on a RAN side for the MT module, and the paging signal is monitored by an intelligent signal amplifier in a fully-on state. After receiving the paging signal, the MT module establishes a wireless connection to the base station, and enables the RF module to work, that is, switches the RF module to an on state.
In another embodiment of this application, the target information includes information that is sent by the network side device and that is used to indicate a switching time point.
The switching, by the node, to the target state based on the target information includes:
For example, when releasing the intelligent signal amplifier, the base station configures a next time point at which the intelligent signal amplifier establishes a connection to the base station and enters a working state, that is, the switching time point. The intelligent signal amplifier autonomously performs timing, and when the switching time point arrives, the intelligent signal amplifier initiates a random access process to establish a connection to the base station, and enables the RF module to the working state, that is, switches the RF module to an on state.
Step 301: A network side device sends indication information used to indicate a node to switch to a target state, where the node includes an MT module and a radio frequency module, and the target state includes at least one of a state of the MT module and a state of the radio frequency module.
The node may be an intelligent signal amplifier node (referred to as an intelligent signal amplifier for short below) or an IAB node.
The intelligent signal amplifier includes an MT module and a radio frequency (RF) module. The MT module is configured to establish a connection to the base station. The base station interacts with the intelligent signal amplifier by using the MT module, to configure a sending parameter of the intelligent signal amplifier. The MT module may also be referred to as an MT function module or an MT function.
For the IAB node, the radio frequency module may also be referred to as a distributed unit (DU) function, and the IAB node includes an MT function and a DU function. The DU function enables the IAB node to provide a wireless access function for a child node or user equipment (UE) like a base station, and the MT function enables the IAB node to be controlled and scheduled by a parent node like the UE.
In the foregoing descriptions, the node may switch a state of the node based on the indication information. For example, the node is not scheduled for forwarding in a preset time period, and may switch the state of the node to a fully-off state, a partially-on state, a partial working state, or a discontinuous working state, to reduce power consumption.
For example, when the intelligent signal amplifier works, the intelligent signal amplifier amplifies an interference signal from a neighboring cell that interferes with UE and a base station of a current cell, and sends a secondary lobe from the current cell to the neighboring cell to interfere with UE and a base station of the neighboring cell. If there is no service or few services in a coverage area of the intelligent signal amplifier, the intelligent signal amplifier may be in an off state or a partially off state, thereby effectively reducing interference caused by the intelligent signal amplifier and reducing power consumption of the intelligent signal amplifier. When the intelligent signal amplifier needs to work, the intelligent signal amplifier is switched to a fully-open state through state switching.
In this embodiment, the network side device sends the indication information used to indicate the node to switch to the target state, where the node includes the MT module and the radio frequency module, and the target state includes at least one of the state of the MT module and the state of the radio frequency module. The node can switch the state of the node based on indication information, thereby improving flexibility of node state switching.
In the foregoing descriptions, the indication information is indicated by Radio Resource Control RRC signaling, Media Access Control MAC control element CE signaling, signaling carried by a physical downlink control channel PDCCH, or a BAP control protocol data unit PDU.
The target state includes a fully-on state, a fully-off state, a partially-on state, a partial working state, or a discontinuous working state. In a case that both the MT module and the RF module are in an on state, the state of the node is a fully-on state.
When the node is in a fully-off state, both the MT module and the RF module are in an off state. In this state, there may be the following three sub-states. When releasing a connection to the intelligent signal amplifier, a serving base station may indicate, in a release message, that the intelligent signal amplifier is in one of the following states after releasing the connection:
The partially-on state of the node includes one of the following:
In the partially-on state, the RF module is in an off state, so that power consumption can be reduced and power can be saved.
The partial working state includes one of the following:
For example, the RF module works in an uplink slot and is in an off state in a downlink slot; and the RF module is enabled in an uplink slot and a downlink slot to work, and is in an off state in some unavailable slots. For example, when the intelligent signal amplifier is controlled by the IAB node, and some slots of a DU function of the IAB node are unavailable slots, the RF module and/or the MT module of the intelligent signal amplifier may be configured to be in an off state in the unavailable slots.
The discontinuous working state includes:
Start time from which the radio frequency module in an on state may be obtained by offsetting preset time from start time from which the MT module in an on state. The preset time is greater than or equal to 0. When the preset time is equal to 0, the start time from which the radio frequency module in an on state is the same as the start time from which the MT module in an on state.
The discontinuous working state of the radio frequency module is configured based on a slot bitmap or a symbol bitmap sent by a network side device. The slot bitmap or the symbol bitmap is indicated by using RRC signaling, MAC CE signaling, or signaling carried by a PDCCH.
In the fully-off state, the network side device reserves context of the MT module and context of the radio frequency module.
The context of the MT module includes at least one of the following:
The context of the radio frequency module includes at least one of the following:
The indication information includes a radio access network paging signal on a RAN side based on an inactive radio network temporary identifier I-RNTI; or
Information used to indicate a switching time point.
Specifically, the node may establish a wireless connection to the network side device based on the received I-RNTI-based paging signal on a RAN side, and the node switches the radio frequency module to an on state; or the node may establish a wireless connection to the network side device based on received information used to indicate the switching time point, and switch the radio frequency module to an on state in a case that current time of the node is the switching time point.
It should be noted that the node state control method provided in the foregoing embodiments of this application may be performed by a node state control apparatus or a control module that is in the node state control apparatus and that is configured to perform the node state control method.
In the following embodiment, a node state control apparatus performs the node state control method is used as an example to describe the node state control apparatus provided in the embodiments of this application.
Optionally, the target information includes at least one of the following:
Optionally, the target information is indicated by Radio Resource Control RRC signaling, Media Access Control MAC control element CE signaling, signaling carried by a physical downlink control channel PDCCH, or a BAP control protocol data unit PDU.
Optionally, the target state includes a fully-on state, a fully-off state, a partially-on state, a partial working state, or a discontinuous working state.
Optionally, the fully-off state includes one of the following:
Optionally, the partially-on state includes one of the following:
Optionally, the partial working state includes one of the following:
Optionally, the discontinuous working state includes:
Optionally, start time at which the radio frequency module in an on state is determined based on the following:
Optionally, the discontinuous working state of the radio frequency module is configured based on a slot bitmap or a symbol bitmap sent by a network side device.
Optionally, the slot bitmap or the symbol bitmap is indicated by using RRC signaling, MAC CE signaling, or signaling carried by a PDCCH.
Optionally, the first switching module 502 is configured to: in a case that the node is not scheduled for forwarding in a first preset time period, switch to one of the following states based on the target information:
Optionally, the apparatus further includes a second switching module, configured to:
Optionally, the first switching module is configured to: in a case that the node is in a partially-on state and the node is scheduled for forwarding, switch to the following state based on the target information:
Optionally, in the fully-off state, the node reserves context of the MT module and context of the radio frequency module.
Optionally, the context of the MT module includes at least one of the following:
Optionally, the context of the radio frequency module includes at least one of the following:
Optionally, the target information includes a paging signal on a radio access network RAN side based on an inactive radio network temporary identifier I-RNTI sent by a network side device.
The first switching module 502 is configured to: establish a wireless connection to the network side device, and switch the radio frequency module to an on state.
Optionally, the target information includes information that is sent by a network side device and that is used to indicate a switching time point.
The first switching module 502 is configured to: in a case that current time of the node is the switching time point, establish a wireless connection to the network side device; and switch the radio frequency module to an on state.
Optionally, the node is an intelligent signal amplifier node or an integrated access and backhaul IAB node.
The first node state control apparatus 500 in this embodiment of this application may be an apparatus, or may be a component, an integrated circuit, or a chip in a terminal.
The first node state control apparatus 500 in this embodiment of this application may be an apparatus with an operating system. The operating system may be an Android operating system, an iOS operating system, or another possible operating system. This is not specifically limited in this embodiment of this application.
The first node state control apparatus 500 provided in this embodiment of this application can implement the processes of the method embodiment of
Optionally, the indication information is indicated by Radio Resource Control RRC signaling, Media Access Control MAC control element CE signaling, signaling carried by a physical downlink control channel PDCCH, or a BAP control protocol data unit PDU.
Optionally, the target state includes a fully-on state, a fully-off state, a partially-on state, a partial working state, or a discontinuous working state.
Optionally, the fully-off state includes one of the following:
Optionally, the partially-on state includes one of the following:
Optionally, the partial working state includes one of the following:
Optionally, the discontinuous working state includes:
Optionally, start time at which the radio frequency module in an on state is determined based on the following:
Optionally, the discontinuous working state of the radio frequency module is configured based on a slot bitmap or a symbol bitmap sent by a network side device.
Optionally, the slot bitmap or the symbol bitmap is indicated by using RRC signaling, MAC CE signaling, or signaling carried by a PDCCH.
Optionally, in the fully-off state, the network side device reserves context of the MT module and context of the radio frequency module.
Optionally, the context of the MT module includes at least one of the following:
Optionally, the context of the radio frequency module includes at least one of the following:
Optionally, the indication information includes a paging signal on a radio access network RAN side based on an inactive radio network temporary identifier I-RNTI;
Optionally, the node is an intelligent signal amplifier node or an integrated access and backhaul IAB node.
The second node state control apparatus 600 provided in this embodiment of this application can implement the processes of the method embodiment of
Optionally, as shown in
An embodiment of this application further provides a network side device. As shown in
The frequency band processing apparatus may be located in the baseband apparatus 93. The method performed by the network side device in the foregoing embodiment may be implemented in the baseband apparatus 93. The baseband apparatus 93 includes a processor 94 and a memory 95.
The baseband apparatus 93 may include, for example, at least one baseband board, where a plurality of chips are disposed on the baseband board. As shown in
The baseband apparatus 93 may further include a network interface 96, configured to exchange information with the radio frequency apparatus 92. For example, the interface is a common public radio interface (CPRI).
Specifically, the network side device in this embodiment of the present invention further includes an instruction or a program that is stored in the memory 95 and that can be run on the processor 94. The processor 94 invokes the instruction or the program in the memory 95 to perform the method performed by the modules shown in
An embodiment of this application further provides a readable storage medium. The readable storage medium may be non-volatile or volatile. The readable storage medium stores a program or an instruction, and the program or the instruction is executed by a processor to implement the processes of the foregoing method embodiment in
The processor is a processor in the terminal or the network side device in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc.
An embodiment of this application further provides a chip. The chip includes a processor and a communications interface. The communications interface is coupled to the processor, and when the processor is configured to run a program or an instruction of a network side device, so that the processes of the method embodiment in
It should be understood that the chip mentioned in this embodiment of this application may also be referred to as a system-level chip, a system chip, a chip system, or an on-chip system chip.
An embodiment of this application further provides a computer program product. The computer program product is stored in a non-transitory readable storage medium, and the computer program product is executed by at least one processor to implement the processes of the foregoing method embodiment in
It should be noted that, in this specification, the term “include”, “comprise”, or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, a method, an article, or an apparatus that includes a list of elements not only includes those elements but also includes other elements which are not expressly listed, or further includes elements inherent to such process, method, article, or apparatus. An element limited by “includes a . . . ” does not, without more constraints, preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be noted that the scope of the method and the apparatus in the embodiments of this application is not limited to performing functions in an illustrated or discussed sequence, and may further include performing functions in a basically simultaneous manner or in a reverse sequence according to the functions concerned. For example, the described method may be performed in an order different from that described, and the steps may be added, omitted, or combined. In addition, features described with reference to some examples may be combined in other examples.
Based on the descriptions of the foregoing implementations, a person skilled in the art may clearly understand that the method in the foregoing embodiment may be implemented by software in addition to a necessary universal hardware platform or by hardware only. In most circumstances, the former is a preferred implementation. Based on such an understanding, the technical solutions of this application essentially or the part contributing to the prior art may be implemented in a form of a software product. The computer software product is stored in a storage medium (such as a ROM/RAM, a hard disk, or an optical disc), and includes several instructions for instructing a terminal (which may be mobile phone, a computer, a server, an air conditioner, a network device, or the like) to perform the methods described in the embodiments of this application.
The embodiments of this application are described above with reference to the accompanying drawings, but this application is not limited to the above specific implementations, and the above specific implementations are only illustrative and not restrictive. Under the enlightenment of this application, those of ordinary skill in the art can make many forms without departing from the purpose of this application and the protection scope of the claims, all of which fall within the protection of this application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110815545.8 | Jul 2021 | CN | national |
This application is continuation application of PCT International Application No. PCT/CN2022/105178 filed on Jul. 12, 2022, which claims priority to Chinese Patent Application No. 202110815545.8, filed on Jul. 19, 2021 in China, which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/105178 | Jul 2022 | US |
| Child | 18418092 | US |
