Patent Application
20230354200
This application relates to the field of communications technologies, and in particular, to a terminal state switch method and apparatus, and a terminal.
In the design of 3G, 4G, and 5G communications systems, different radio resource control (RRC) states of the terminal are introduced, including an idle state and a connected state. When the terminal needs to send and receive data or has services, the terminal may enter the connected state; and in order to save power, the terminal can switch from the connected state to the idle state after receiving and sending data. In the idle state, the terminal only needs to receive necessary synchronization information, paging information, and system broadcast information such as a system information block (SIB), and at the same time, the terminal needs to perform radio resource management (RRM) measurement for operations such as cell selection or reselection. Compared with the connected state, the power in the idle state can be reduced a lot, and generally speaking, the power can reach a 10-mW level, which is one tenth or even less of that in the connected state.
However, in the late 4G and a new radio (NR) system of 5G, a new RRC state is introduced: an inactive state. In this state, the behavior of the terminal is basically similar to that in the idle state. In addition to the idle state behavior, it is also necessary to receive an RAN paging message and update an RNA (RAN notification area) area.
It can be seen that a maximum power-saving state of the current terminal is the idle state. However, in the design of the idle state, it still needs to receive synchronization information, Paging information, and system broadcast information such as a system information block (SIB), and perform RRM measurement. As a result, communication power consumption of the terminal in the idle state is unable to be reduced and there may be unnecessary power consumption.
According to a first aspect, an embodiment of this application provides a terminal state switch method, including:
According to a second aspect, an embodiment of this application provides a terminal state switch apparatus, applied to a terminal and including:
According to a third aspect, an embodiment of this application provides a terminal. The terminal includes a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, where when the program or the instruction is executed by the processor, steps of the method according to the first aspect are implemented.
According to a fourth aspect, an embodiment of this application provides a readable storage medium. 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 method according to the first aspect are implemented.
According to a fifth aspect, an embodiment of this application provides a chip. 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 method according to the first aspect.
According to a sixth aspect, an embodiment of this application provides a computer program product. The computer program product is stored in a non-volatile storage medium, and the computer program product is executed by at least one processor to implement steps of the method according to the first aspect.
According to a seventh aspect, an embodiment of this application provides a communications device, configured to perform steps in the method according to the first aspect.
The following clearly describes the technical solutions in the embodiments of this application with reference to the 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 without creative efforts shall fall within the protection scope of this application.
The terms “first”, “second”, and the like in the description and the claims of this application are used to distinguish between similar objects, and do not need to be used to describe a specific order or sequence. It should be understood that, the terms termed in such a way are 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”, “second”, and the like are usually of a same type, and the number 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 a character “/” generally represents an “or” relationship between associated objects.
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 communication 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. A new radio (NR) system is described below for an illustration purpose, and the term NR is used in most of the descriptions, although these technologies can also be used in an application other than an NR system application, for example, a 6th generation (6G) communications system.
With reference to the accompanying drawings, the terminal state switch method and apparatus, and a terminal provided in the embodiments of this application are described in detail below by using specific embodiments and application scenarios thereof.
As shown in
Step 201. When a first condition is met, switch a terminal from a first state to a second state, where the second state is an idle state, a connected state, or an inactive state, and communication power consumption of the terminal in the first state is less than communication power consumption of the terminal in the second state.
Optionally, that communication power consumption of the terminal in the first state is less than communication power consumption of the terminal in the second state is specifically:
In at least one embodiment of this application, a first state is a newly introduced terminal state, which may be referred to as a sleep state, or a zero power (ZP) state, or an almost zero power (Almost Zero Power, AZP or Near Zero Power, NZP) state, or a low power (LP) state, or an ultra/super low power (ULP/SLP) state, which are subsequently all referred to as the SLEEP state.
For example, the first state may be a newly defined RRC state, which is an RRC state different from the existing three RRC states: an RRC connected state (RRC_CONNECTED), an RRC idle state (RRC_IDLE), and an RRC inactive state (RRC_INACTIVE); or is a sub-state of the existing RRC state, such as a sub-state of the RRC idle state; or is a newly defined core network state, which is a core network state different from the existing core network connected state (such as connection management CM_CONNECTED) and a core network idle state (CM IDLE).
In the SLEEP state, the terminal can further reduce reception of a synchronization signal (SS), a reference signal (RS), paging information, or system broadcast information such as a system information block (SIB), and reduce RRM measurement. Through reduction of the receiving/measuring behavior, the RF and MODEL modules can be really turned off, thus greatly reducing power consumption of communication reception. For example, it can be achieved by introducing a receiver with near “zero” power into the receiving module of the terminal. This receiver with near “zero” power does not need complex RF module signal detection (such as amplification, filtering, quantization, and the like) and MODEM signal processing, and can wake up the terminal only by passively matching filtering and signal processing with lower power consumption.
Since the SLEEP state is introduced into the terminal, it is necessary to define a new state switch process for the terminal to enter a non-SLEEP state (namely, a second state) from the SLEEP state, so as to ensure that the terminal can obtain benefits of power saving as much as possible on the premise of sufficiently reliable communication quality. This application describes in detail the introduction from the SLEEP state to the non-SLEEP state and a corresponding process.
The first condition includes at least one of the following conditions.
Condition a1, the terminal receives a wake-up signal or an activation signal, and the wake-up signal or the activation signal is used to instruct the terminal to switch from the first state to the second state or exit from the first state, where
Condition a2, the terminal does not receive a wake-up signal or an activation signal within first preset duration; this condition is to prevent the terminal from falling off the network while sleeping for too long; and the first preset duration is configured by a network or specified in a protocol; and
Condition a3, a preset cycle or a timer expires; and the preset cycle or the timer is used to control the terminal to switch from the first state to the second state, and under this condition, the terminal periodically retreats to the second state, where
Condition a4, the type of the terminal changes.
Condition a5, the state of the terminal changes.
Condition a6, the attribute of the terminal changes.
Condition a7, the scenario of the terminal changes.
For the condition a4 to the condition a7, the terminal determines, based on the attribute, the type, the state, or the scenario (such as a terminal of a fixed type or a terminal deployed in a fixed scenario), whether to switch from the first state to the second state. Specifically, when the type, the state, the attribute, or the scenario of the terminal changes, the terminal switches from the first state to the second state.
Optionally, the condition a4 is: the type of the terminal changes within fifth preset duration; the condition a5 is: the state of the terminal changes within sixth preset duration; the condition a6 is: the attribute of the terminal changes within seventh preset duration; and the condition a7 is: the scenario of the terminal changes within eighth preset duration. The fifth preset duration, the sixth preset duration, the seventh preset duration, and the eighth preset duration are configured by a network side or specified in a protocol.
Condition a8, the terminal determines based on a preset rule that the terminal moves, where the preset rule is configured by a network or specified in a protocol. For example, the terminal determines, based on determining whether the terminal moves, whether to switch from the first state to the second state. Specifically, when the terminal moves, the terminal switches from the first state to the second state.
Condition a9, the terminal determines based on internal implementation that the terminal moves. For example, the terminal determines whether the terminal moves based on characteristics thereof or an internal sensor, and the terminal switches from the first state to the second state when the terminal moves.
Condition a10, the terminal determines based on the internal implementation that it is necessary to switch from the first state to the second state. For example, the terminal determines whether it is necessary to switch from the first state to the second state based on an internal cycle or an internal timer; and specifically, when the internal cycle or the internal timer expires, the terminal switches from the first state to the second state.
Condition a11, the area in which the terminal is located changes. For example, the terminal determines whether the area in which the terminal is located is updated, so as to determine whether to switch from the first state to the second state; and specifically, when the area in which the terminal is located changes, the terminal switches from the first state to the second state.
Condition a12, the terminal receives a system information change instruction. For example, the system information change indication may be carried by using a wake-up signal or sequence.
Condition a13, the terminal receives a reference signal change instruction. For example, the reference signal change indication may be carried by using a wake-up signal or sequence.
Condition a14, received signal quality of the terminal is higher than a first threshold.
Condition a15, a variable quantity of the received signal quality of the terminal is lower than a second threshold.
Condition a16, the received signal quality of the terminal is lower than a third threshold.
Condition a17, the variable quantity of the received signal quality of the terminal is higher than a fourth threshold.
For the condition a14 to the condition a17, the received signal quality includes: at least one of reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indication (RSSI), pathloss, or signal to interference plus noise ratio (SINR).
Optionally, the condition a14 is: the received signal quality of the terminal in ninth preset duration is higher than the first threshold; the condition a15 is: the variable quantity of the received signal quality of the terminal in tenth preset duration is lower than the second threshold; the condition a16 is: the received signal quality of the terminal in eleventh preset duration is lower than the third threshold; and the condition a17 is: the variable quantity of the received signal quality of the terminal in twelfth preset duration is higher than the fourth threshold, where the ninth preset duration, the tenth preset duration, the eleventh preset duration, and the twelfth preset duration are configured by a network side or specified in a protocol.
In an optional embodiment, for the condition a11, the method further includes:
The area information includes a sequence, a signal, or ID information indicating the area information.
Optionally, when a second condition is met, the determining that the area in which the terminal is located changes includes:
In another optional embodiment, when the first condition includes that the terminal receives the wake-up signal or the activation signal, or the terminal does not receive the wake-up signal or the activation signal within the first preset duration, the method further includes:
For example, the related parameter of the wake-up signal or the activation signal includes at least one of time domain information, frequency domain information, code domain information, spatial domain information, or a sequence of the wake-up signal or the activation signal.
The receiving, by the terminal, configuration information sent by a network side device specifically includes the following methods.
Method 1, the terminal receives a configuration for the wake-up signal from the network, including one or more of the following:
Method 2, the terminal receives a configuration of the wake-up signal from the network, including one or more of the following:
Following the above example, in step 201, after the terminal switches from the first state to the second state, the method further includes at least one of the following:
The first communications device includes at least one of the following: a network side device (such as a base station, an access point, or the like), another terminal device communicating with the terminal (such as Sidelink or another terminal in D2D or V2X), and a transceiver node of another non-mobile communications system communicating with the terminal (such as a sensor receiving apparatus, a transmitting apparatus, or the like).
The sending, by the terminal, first indication information to a first communications device includes:
In at least one optional embodiment of this application, the sending, by the terminal, first indication information to a first communications device includes:
For example, if the target condition is the condition a1 and the condition a2 in the first condition, when the terminal switches to the second state based on the trigger of the condition a1 or the condition a2, the terminal sends the first indication information to the first communications device; and when the terminal switches to the second state based on the trigger of the condition a4, the terminal does not send the first indication information to the first communications device.
In at least one optional embodiment of this application, after the terminal switches from the first state to the second state, the method further includes:
When the fifth condition is met, the method further includes:
In other words, when the fifth condition is met, if it is necessary for the terminal to switch to the first state, there are following two manners:
Before the terminal switches to the first state, the sending, by the terminal, second indication information to the first communications device includes:
In an optional embodiment, the terminal maintaining the second state includes:
For example, if the terminal may move out of the area in which the terminal is located, the terminal maintains the second state, which can reduce an overhead of the wake-up signal in the sleep state. For example, if the terminal does not belong to a fixed type, or is deployed in a non-fixed scenario, or the state changes, the terminal maintains the second state; and for another example, if the internal module of the terminal detects the movement, the terminal maintains the second state.
When the fourth condition is met, the terminal maintaining the second state includes:
In another optional embodiment, the fifth condition includes at least one of the following:
For example, if the terminal is in a fixed type, or deployed in a fixed scenario, or the state has not changed, the terminal re-enters the first state; and for another example, if the internal module of the terminal does not detect the movement, the terminal re-enters the first state.
When the fifth condition is met, the terminal switching to the first state includes:
if the fifth condition is met within fourth preset duration, the terminal switching to the first state, where the fourth preset duration is specified by a protocol or configured by a network.
It should be noted that the area in which the terminal is located and that mentioned in this embodiment of this application is: a cell, an RAN-based notification area (RAN-based Notification Area, RNA), a tracking area (TA) or a newly defined area.
Example 1: Wake-up signal and paging transmission, where the terminal switches between the sleep state and the idle state again after entering the sleep state, and the network is unknown about this.
1. The terminal wakes up from the SLEEP state to the IDLE state (which can be configured by the network or implemented by the terminal).
a) The terminal wakes up periodically based on the cycle configured by the network.
b) The terminal wakes up based on implementation thereof (including periodicity/sensor/ . . . ).
2. Determine whether the terminal will move out of the cell.
If it is determined that the terminal will move out of the cell, the IDLE state is maintained.
(1) Inform the network that the terminal returns to IDLE, thus reducing an overhead for the network.
(2) The network may not be notified.
If it is determined that the terminal will not move out of the cell, the terminal returns to the SLEEP state without notifying the network.
Example 2: Wake-up signal and paging transmission, where the terminal switches between the sleep state and the idle state again after entering the sleep state, and the network is known about this.
3. The terminal wakes up from the SLEEP state to the IDLE state (which can be configured by the network or implemented by the terminal).
a) The terminal wakes up periodically based on the cycle configured by the network.
b) The terminal wakes up based on implementation thereof (including periodicity/sensor/ . . . ).
4. Determine whether the terminal will move out of the cell.
If it is determined that the terminal will move out of the cell, the IDLE state is maintained.
(1) Inform the network that the terminal returns to IDLE, thus reducing an overhead for the network.
If it is determined that the terminal will not move out of the cell, the terminal returns to the SLEEP state without notifying the network.
Example 3: Wake-up signal+paging+beacon transmission.
If the beacon is configured, when the beacon is lost, the terminal can switch from the SLEEP state to the IDLE state. In this example, the terminal does not need to wake up periodically as in Example 1 and Example 2, which can reduce power consumption.
In this embodiment of this application, by introducing the first state, the terminal can greatly reduce the power consumption of communication reception in the first state, and by defining the first condition that triggers the terminal to switch from the first state to the second state (that is, a non-first state), the terminal is guaranteed to achieve the purpose of saving power on the premise of sufficiently reliable communication quality.
It should be noted that the terminal state switch method provided in the embodiments of this application may be performed by a terminal state switch apparatus or a control module that is in the terminal state switch apparatus and that is configured to perform and load the terminal state switch method. In the embodiments of this application, an example in which the terminal state switch apparatus performs the terminal state switch method is used to describe the terminal state switch apparatus provided in the embodiments of this application.
As shown in
In an optional embodiment, the apparatus further includes:
In an optional embodiment, the determining module includes:
In an optional embodiment, when the first condition includes that the terminal receives the wake-up signal or the activation signal, or the terminal does not receive the wake-up signal or the activation signal within the first preset duration, the apparatus further includes:
In an optional embodiment, after the terminal switches from the first state to the second state, the apparatus further includes at least one of the following:
In an optional embodiment, the first sending module includes:
In an optional embodiment, the first sending module includes:
In an optional embodiment, the apparatus further includes:
In an optional embodiment, the apparatus further includes:
In an optional embodiment, the second sending module includes:
In an optional embodiment, the maintaining module includes:
In an optional embodiment, the maintaining submodule includes:
In an optional embodiment, the fifth condition includes at least one of the following:
In an optional embodiment, the second switch module includes:
In this embodiment of this application, by introducing the first state, the terminal can greatly reduce the power consumption of communication reception in the first state, and by defining the first condition that triggers the terminal to switch from the first state to the second state (that is, a non-first state), the terminal is guaranteed to achieve the purpose of saving power on the premise of sufficiently reliable communication quality.
It should be noted that the terminal state switch apparatus provided in the embodiments of this application is an apparatus that can perform the foregoing terminal state switch method. Therefore, all embodiments of the foregoing terminal state switch method are applicable to the apparatus, and a same or similar beneficial effect can be achieved.
The terminal state switch apparatus 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 apparatus may be a mobile electronic device, or may be a non-mobile electronic device. For example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), or the like. The non-mobile electronic device may be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, a self-service machine, or the like. This is not specifically limited in the embodiments of this application.
The terminal state switch apparatus in this embodiment of this application may be an apparatus with an operating system. The operating system may be an Android operating system, may be an iOS operating system, or may be another possible operating system. This is not specifically limited in this embodiment of this application.
The terminal state switch apparatus provided in this embodiment of this application can implement processes implemented in the method embodiments from
Optionally, as shown in
A terminal 500 includes but is not limited to components such as a radio frequency unit 501, a network module 502, an audio output unit 503, an input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, and a processor 510.
A person skilled in the art can understand that the terminal 500 may further include a power supply (such as a battery) that supplies power to each component. The power supply may be logically connected to the processor 510 by using a power supply management system, to implement functions such as charging and discharging management, and power consumption management by using the power supply management system. The terminal structure shown in
It should be understood that, in the embodiments of this application, the input unit 504 may include a graphics processing unit (GPU) 5041 and a microphone 5042, and the graphics processing unit 5041 processes image data of a still picture or video obtained by an image capture apparatus (such as a camera) in a video capture mode or an image capture mode. The display unit 506 may include a display panel 5061, and the display panel 5061 may be configured in a form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 507 includes a touch panel 5071 and another input device 5072. The touch panel 5071 is also referred to as a touchscreen. The touch panel 5071 may include two parts: a touch detection apparatus and a touch controller. The another input device 5072 may include but is not limited to a physical keyboard, a functional button (such as a volume control button or a power on/off button), a trackball, a mouse, and a joystick. Details are not described herein.
In this embodiment of this application, the radio frequency unit 501 receives downlink data from a network side device and then sends the downlink data to the processor 510 for processing; and sends uplink data to the network side device. Usually, the radio frequency unit 501 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The memory 509 may be configured to store a software program or an instruction and various data. The memory 509 may mainly include a program or instruction storage area and a data storage area. The program or instruction storage area may store an operating system, and an application or an instruction required by at least one function (for example, a sound playing function or an image playing function). In addition, the memory 509 may include a high-speed random access memory, and may further include a non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or a flash memory, for example, at least one disk storage device, a flash memory device, or another non-volatile solid-state storage device.
The processor 510 may include one or more processing units. Optionally, an application processor and a modem processor may be integrated into the processor 510. The application processor mainly processes an operating system, a user interface, an application, an instruction, or the like. The modem processor mainly processes wireless communications, for example, a baseband processor. It can be understood that, alternatively, the modem processor may not be integrated into the processor 510.
The processor 510 is configured to: when a first condition is met, control the terminal to switch from a first state to a second state, where the second state is an idle state, a connected state, or an inactive state, and communication power consumption of the terminal in the first state is less than communication power consumption of the terminal in the second state, where
In this embodiment of this application, by introducing the first state, the terminal can greatly reduce the power consumption of communication reception in the first state, and by defining the first condition that triggers the terminal to switch from the first state to the second state (that is, a non-first state), the terminal is guaranteed to achieve the purpose of saving power on the premise of sufficiently reliable communication quality.
It should be noted that the terminal provided in the embodiments of this application is a terminal that can perform the foregoing terminal state switch method. Therefore, all embodiments of the foregoing terminal state switch method are applicable to the terminal, and a same or similar beneficial effect can be achieved.
An embodiment of this application further provides a readable storage medium. The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by a processor, the processes of the foregoing embodiments of the terminal state switch method are implemented, and a same technical effect can be achieved. To avoid repetition, details are not described herein again.
The processor is a processor in the electronic device in the foregoing embodiment. 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 the processor is configured to run a program or an instruction to implement the processes of the foregoing embodiments of the terminal state switch method, and a same technical effect can be achieved. To avoid repetition, details are not described herein again.
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 system on chip, a system chip on chip, and the like.
An embodiment of this application further provides a computer program product, the computer program product is stored in a non-volatile storage medium, and the computer program product is executed by at least one processor to implement the processes of the foregoing method embodiment, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.
An embodiment of this application provides an electronic device, configured to perform the processes of the foregoing method embodiments, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.
It should be noted that in this specification, the term “include”, “comprise”, or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements that are not explicitly listed, or includes elements inherent to such a 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.
The foregoing descriptions are merely specific implementations of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110199053.0 | Feb 2021 | CN | national |
This application is a continuation of International Application No. PCT/CN2022/076686, filed on Feb. 17, 2022, which claims priority to Chinese Patent Application No. 202110199053.0, filed on Feb. 22, 2021, which are incorporated herein by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/076686 | Feb 2022 | US |
| Child | 18350815 | US |
