WO2022199534A1 - Non-terrestrial network power control method and apparatus, device, and readable storage medium - Google Patents

Abstract

Embodiments of the present application provide a power control method and apparatus, a device, and a readable storage medium. The method comprises: when a trigger condition is satisfied, sending a power headroom report (PHR) to a network node of a non-terrestrial network, wherein the trigger condition needing to be satisfied comprises one or more of: first indication information sent by the network node of the non-terrestrial network is received, a PHR reporting threshold of the non-terrestrial network is reached, the type of the non-terrestrial network changes, and a terminal switches between the non-terrestrial network and a terrestrial network. In the embodiments of the present application, considering the characteristics of a non-terrestrial network, a PHR reporting trigger condition is added, so that a PHR reporting mechanism can be better adapted to the non-terrestrial network.

Description

Power control method, apparatus, device and readable storage medium for non-terrestrial network

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202110312549.4 and the filing date of March 24, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a power control method, apparatus, device, and readable storage medium for a non-terrestrial network.

Background technique

Power headroom reporting (PHR) is used to report the difference between the estimated uplink transmit power and the terminal's maximum uplink transmit power to the base station, and the base station can perform corresponding power control and scheduling after obtaining the information.

In the prior art, the triggering condition of PHR is that the periodic timer (periodicPHR-Timer) times out, or, when the terminal has uplink resources for transmitting new data, the prohibitPHR-Timer timer times out or has expired, and the last transmission power surplus After the quantity report, the change value of the path loss has exceeded the downlink path loss change (dl-PathlossChange) dB.

At present, the PHR configuration is mainly applicable to terrestrial networks and cannot be applied to satellite networks. And the PH range (-32...+38dB) that can be indicated by the existing PHR is small, while in a non-terrestrial network (Non-terrestrial Network, NTN) (such as a satellite network), due to the long communication distance, the transmission of the terminal The power needs to be higher, and how to configure the PHR in the non-terrestrial network is an urgent problem to be solved.

SUMMARY OF THE INVENTION

One purpose of the embodiments of the present application is to provide a power control method, apparatus, device, and readable storage medium, so as to solve the problem of how to configure the PHR in a non-terrestrial network.

A first aspect provides a power control method for a non-terrestrial network, executed by a terminal, including:

When the trigger condition is met, send a power headroom report to the network node of the non-terrestrial network;

Wherein, the satisfying trigger condition includes one or more of the following:

receiving the first indication information sent by the network node of the non-terrestrial network;

Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

a change in the type of said non-terrestrial network;

The terminal switches between a non-terrestrial network and a terrestrial network.

Optionally, the first indication information is sent by a network node of the non-terrestrial network when the virtual cell is added or changed; or, the first indication information is used to indicate that the pattern reported by the power headroom report is the same as the reported pattern. Describe the mapping relationship of the cell or beam change of the network node of the non-terrestrial network.

Optionally, the first indication information instructs the terminal to obtain ephemeris information;

The sending a power headroom report to a network node of a non-terrestrial network includes:

Based on the ephemeris information, a power headroom report is sent to a network node of the non-terrestrial network.

Optionally, according to the ephemeris information, send a power headroom report to the network node of the non-terrestrial network, including:

According to the ephemeris information and the trajectory information of the terminal, a power headroom report is sent to the network node of the non-terrestrial network.

Optionally, the method further includes:

receiving second indication information sent by the network node of the non-terrestrial network;

According to the second indication information, the uplink transmit power of the terminal is adjusted.

Optionally, the second indication information is a TPC command, and the adjustment of the uplink transmit power of the terminal according to the second indication information includes:

The uplink transmit power of the terminal is adjusted according to the TPC command, where the TPC command is determined by the network node of the non-terrestrial network according to the characteristics of the non-terrestrial network.

Optionally, the second indication information is one or more parameter factors, and adjusting the uplink transmit power of the terminal according to the second indication information includes:

determining a corresponding target parameter factor from the one or more parameter factors according to the characteristics of the non-terrestrial network;

The uplink transmit power of the terminal is adjusted according to the target parameter factor and the TPC command.

Optionally, the format of the MAC CE of the power headroom report includes a first field, and the first field indicates that the power headroom report is sent by the terminal to a network node of a non-terrestrial network.

Optionally, the first field is a PH field, and the number of bits of the PH field is greater than a first preset value;

or,

The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.

Optionally, the MAC CE further includes a second field, the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, and the first field indicates the first field. The power headroom level of the step size of the granularity, and the second field indicates the power headroom level of the step size of the second granularity.

Optionally, the network node includes at least one of the following:

space communication node;

ground network nodes;

Wherein, the space communication node and the ground network node communicate through the first interface;

The space communication node includes at least one of the following protocol layers or functions:

radio frequency unit;

physical layer;

MAC layer;

RLC layer;

PDCP layer;

SDAP layer;

Xn application protocol layer;

Gn application protocol layer;

GTP-U layer;

IP layer;

F1 application protocol layer.

A second aspect provides a power control method for a non-terrestrial network, executed by a network node of the non-terrestrial network, including:

Receiving the power headroom report sent by the terminal when the trigger condition is met;

Wherein, the satisfying trigger condition includes one or more of the following:

receiving the first indication information sent by the network node of the non-terrestrial network;

Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

a change in the type of said non-terrestrial network;

The terminal switches between a non-terrestrial network and a terrestrial network.

Optionally, the first indication information is sent by a network node of the non-terrestrial network when a virtual cell is added or changed;

or,

The first indication information is used to indicate the mapping relationship between the pattern reported by the power headroom report and the change of the cell or the beam of the network node of the non-terrestrial network.

Optionally, the method further includes:

Send second indication information to the terminal, where the second indication information instructs the terminal to adjust the uplink transmit power.

Optionally, the second indication information is a TPC command, and the TPC command is determined by a network node of the non-terrestrial network according to characteristics of the non-terrestrial network;

or,

The second indication information is one or more parameter factors, the parameter factors are related to the characteristics of the non-terrestrial network, and the parameter factors and the TPC command instruct the terminal to adjust the uplink transmit power.

Optionally, the format of the MAC CE of the power headroom report includes a first field, and the first field indicates that the power headroom report is sent by the terminal to a network node of a non-terrestrial network.

Optionally, the first field is a PH field, and the number of bits of the PH field is greater than a first preset value;

or,

The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.

Optionally, the MAC CE further includes a second field, the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, and the first field indicates the first field. The power headroom level of the step size of the granularity, and the second field indicates the power headroom level of the step size of the second granularity.

Optionally, the network node includes at least one of the following:

space communication node;

ground network nodes;

Wherein, the space communication node and the ground network node communicate through the first interface;

The space communication node includes at least one of the following protocol layers or functions:

radio frequency unit;

physical layer;

MAC layer;

RLC layer;

PDCP layer;

SDAP layer;

Xn application protocol layer;

Gn application protocol layer;

GTP-U layer;

IP layer;

F1 application protocol layer.

In a third aspect, a power control device for a non-terrestrial network is provided, including:

a first sending module, configured to send a power headroom report to a network node of a non-terrestrial network when a trigger condition is met;

Wherein, the satisfying trigger condition includes one or more of the following:

receiving the first indication information sent by the network node of the non-terrestrial network;

Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

a change in the type of said non-terrestrial network;

The terminal switches between a non-terrestrial network and a terrestrial network.

In a fourth aspect, a power control device for a non-terrestrial network is provided, including:

a second receiving module, configured to receive a power headroom report sent by the terminal when the trigger condition is met;

Wherein, the satisfying trigger condition includes one or more of the following:

receiving the first indication information sent by the network node of the non-terrestrial network;

Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

a change in the type of said non-terrestrial network;

The terminal switches between a non-terrestrial network and a terrestrial network.

In a fifth aspect, a terminal is provided, including: a processor, a memory, and a program stored on the memory and executable on the processor, the program being executed by the processor as described in the first aspect steps of the method described.

In a sixth aspect, a network-side device is provided, including: a processor, a memory, and a program stored on the memory and executable on the processor, the program being executed by the processor to achieve the second The steps of the method of the aspect.

According to a seventh aspect, a readable storage medium is provided, and a program is stored on the readable storage medium, and when the program is executed by a processor, the steps including the method of the first aspect or the second aspect are implemented.

In the embodiment of the present application, a PHR reporting trigger condition is added according to the characteristics of the non-terrestrial network, so that the PHR reporting mechanism can be better applied to the non-terrestrial network.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for purposes of illustrating preferred embodiments only and are not to be considered limiting of the application. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

Figure 1 is a schematic diagram of a single entry PHR MAC CE;

Fig. 2 is the schematic diagram that the multi-entry PHR MAC CE with the highest ServCellIndex of the serving cell of the configured uplink is less than 8;

Fig. 3 is the schematic diagram that the multiple-access PHR MAC CE of the highest ServCellIndex of the serving cell of the configuration uplink is equal to or greater than 8;

FIG. 4 is one of the schematic diagrams of the power control method of the non-terrestrial network in the embodiment of the present application;

Fig. 5 is one of the schematic diagrams of Single Entry PHR MAC CE in the embodiment of the present application;

Fig. 6 is the second schematic diagram of Single Entry PHR MAC CE in the embodiment of the present application;

7 is the third schematic diagram of the Single Entry PHR MAC CE in the embodiment of the present application;

FIG. 8 is the second schematic diagram of a power control method for a non-terrestrial network in an embodiment of the present application;

FIG. 9 is one of the schematic diagrams of the power control apparatus of the non-terrestrial network in the embodiment of the present application;

FIG. 10 is the second schematic diagram of a power control apparatus for a non-terrestrial network in an embodiment of the present application;

11 is a schematic diagram of a terminal in an embodiment of the present application;

FIG. 12 is a schematic diagram of a network side device in an embodiment of the present application.

Detailed ways

In power headroom reporting, the types of PHR can be divided into 3 types:

-Type 1 (type1): PHR of Physical Uplink Shared Channel (PUSCH);

-Type 2 (type2): PHR when PUSCH and Physical Uplink Control Channel (PUCCH) are sent in parallel on the same carrier;

-Type 3 (type3): PHR of Sounding Reference Signal (SRS).

PHR media access control control unit (MAC CE) has two types: single entry (Single Entry) PHR MAC CE and multiple entry (Multiple Entry) PHR MAC CE, as shown in Figure 1, Figure 2 and Figure 3 respectively.

Among them, P _CMAX,f,c : If this field is present, it is used to instruct P _CMAX,f,c to calculate the value of the PH field.

P: Used to indicate that the MAC entity applies power backoff.

R: Reserved bit, set to "0".

V: Used to indicate that the PH value is based on the real transmission or a reference format. For Type 1PH, V=0 indicates the actual transmission on the uplink physical shared channel (Physical Uplink Shared Channel, PUSCH), and V=1 indicates that the PUSCH reference format is used. For Type2PH, V=0 indicates that the physical uplink control channel (Physical Uplink Control Channel, PUCCH) is actually transmitted, and V=1 indicates that the PUCCH reference format is used. For Type3PH, V=0 represents the actual transmission of the SRS, and V=1 represents the channel sounding reference signal (Sounding Reference Signal, SRS) reference format. That is, for the above three formats, V=0 indicates the associated _PCMAX,f,c field, and V=1 will not contain _PCMAX,f,c .

Table 1: Power Headroom levels for PHR.

PH	power headroom level
0	POWER_HEADROOM_0
1	POWER_HEADROOM_1
2	POWER_HEADROOM_2
3	POWER_HEADROOM_3
…	…
60	POWER_HEADROOM_60
61	POWER_HEADROOM_61
62	POWER_HEADROOM_62
63	POWER_HEADROOM_63

Table 2: Nominal UE transmit power level for PHR.

P CMAX,f,c	Nominal terminal transmit power level
0	PCMAXC00
1	PCMAXC01
2	PCMAXC02
…	…
61	PCMAXC61
62	PCMAXC62
63	PCMAXC63

See Table 3 and Table 4 for the power headroom reporting range and P _CMAX,c,f reporting range, respectively.

Table 3: Power headroom report mapping.

report value	actual measured value
POWER_HEADROOM_0	PH<-32
POWER_HEADROOM_1	-32≤PH<-31
POWER_HEADROOM_2	-31≤PH<-30
POWER_HEADROOM_3	-30≤PH<-29
…	…
POWER_HEADROOM_53	20≤PH≤21
POWER_HEADROOM_54	21≤PH≤22
POWER_HEADROOM_55	22≤PH≤24
POWER_HEADROOM_56	24≤PH≤26
POWER_HEADROOM_57	26≤PH≤28
POWER_HEADROOM_58	28≤PH≤30
POWER_HEADROOM_59	30≤PH≤32
POWER_HEADROOM_60	32≤PH≤34
POWER_HEADROOM_61	34≤PH≤36
POWER_HEADROOM_62	36≤PH≤38
POWER_HEADROOM_63	PH≥38

Table 4: Mapping of P _CMAX,cf .

report value	actual measured value	unit
PCMAXC00	P CMAX,c,f <-29	dBm
P CMAX_C_01	-29≤P CMAX,c,f <-28	dBm
PCMAX_C_02	-28≤P CMAX,c,f <-27	dBm
…	…	…
PCMAX_C_61	31≤P CMAX,c,f <32	dBm
PCMAX_C_62	32≤P CMAX,c,f <33	dBm
PCMAX_C_63	33≤P CMAX,c,f	dBm

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The term "comprising" and any variations thereof in the description and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to the explicit Those steps or units are explicitly listed, but may include other steps or units not expressly listed or inherent to the process, method, product or apparatus. In addition, the use of "and/or" in the description and the claims indicates at least one of the connected objects, such as A and/or B, indicating that there are three cases including A alone, B alone, and both A and B.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiments or designs described in the embodiments of the present application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

It is worth noting that the technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Division Multiple Access (Code Division Multiple Access, CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. However, the following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, although these techniques are also applicable to applications other than NR system applications, such as 6th generation ( 6th Generation, 6G) communication system.

Referring to FIG. 4 , an embodiment of the present application provides a power control method for a non-terrestrial network, which is executed by a terminal, and the specific steps include: step 401 .

Step 401: when a trigger condition is met, send a power headroom report to a network node of a non-terrestrial network;

Wherein, the satisfying trigger condition includes one or more of the following:

(1) receiving the first indication information sent by the network node of the non-terrestrial network;

It can be understood that the network node of the non-terrestrial network may send the first indication information in an explicit or implicit manner.

Embodiment 1: The first indication information is sent by the network node of the non-terrestrial network when the virtual cell is added or changed. Exemplarily, the PHR reporting is indicated in the system message, or the PHR reporting requirement is included in the virtual cell indication.

The explanation about virtual cells is as follows: virtual cell 1 belongs to country 1, virtual cell 2 belongs to country 2, and virtual cell 1 and virtual cell 2 belong to the same physical cell 1; The ground transmits too much power; when the terminal according to the range of virtual cell 1 and virtual cell 2 defined by the network, if it finds that the boundary from virtual cell 2 is greater than a certain threshold, it will trigger PHR and carry the reason; after the network node receives it, it will According to the information reported by the PHR and the legal restrictions of the records, the uplink power control is performed on the terminal, and the related data scheduling modulation and coding strategy (Modulation and Coding Scheme, MCS), Transport Block (Transport Block, TB) and other settings are changed.

Embodiment 2: The first indication information is used to indicate the mapping relationship between the pattern reported by the power headroom report and the change of the cell or beam of the network node of the non-terrestrial network.

Exemplarily, the terminal does not move at a certain position, the satellite at this position is covered by satellite A at T0, T1 becomes the coverage of satellite B, T2 becomes the coverage of satellite C, ..., the network node is based on the cell or beam coverage. In case of changes, a pattern of T0, T1, T2... is sent to the terminal, and then the UE triggers the reporting of PHR according to this pattern.

Embodiment 3: The first indication information instructs the terminal to obtain ephemeris information, and the terminal sends a power headroom report to the network node of the non-terrestrial network according to the ephemeris information. Further, according to the ephemeris information and the trajectory information of the terminal, a power headroom report is sent to the network node of the non-terrestrial network.

The network node sends an indication message to the terminal, and then the terminal triggers the reporting of the PHR according to the learned ephemeris information and (optionally) the terminal's own trajectory information.

(2) Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

In the embodiment of the present application, the PHR reporting threshold based on the terminal granularity in the prior art is changed to the PHR reporting threshold based on the network type granularity, that is, a PHR reporting threshold is defined for each network type. Radio Resource Control (RRC) configures the PHR thresholds corresponding to different networks for the terminal, and the terminal selects it adaptively.

Network types can include: terrestrial networks, Geostationary Orbit (GEO) satellite networks, Middle Earth Orbit (MEO) satellite networks, Low Earth Orbit (LEO) satellite networks, UAV networks, etc. , it can be understood that the PHR reporting threshold is related to the different uplink transmit power requirements caused by the height of different network nodes;

(3) The type of the non-terrestrial network is changed;

For example, LEO becomes GEO, or GEO becomes LEO.

(4) The terminal switches between the non-terrestrial network and the terrestrial network.

It can be understood that the network node of the non-terrestrial network may be a network node on a satellite or a network node on an unmanned aerial vehicle.

In this embodiment of the present application, the network node includes at least one of the following:

(a) space communication nodes;

(b) terrestrial network nodes;

Wherein, the space communication node and the ground network node communicate through a first interface;

The space communication node includes at least one of the following protocol layers or functions:

(1) Radio frequency unit;

(2) Physical layer;

(3) Medium Access Control (MAC) layer;

(4) Radio Link Control (RLC) layer;

(5) Packet data convergence protocol (PDCP) layer;

(6) Service Data Adaptation Protocol (SDAP) layer;

(7) Xn application protocol (Application Protocol, AP) layer;

(8) Gn application protocol layer;

(9) General packet radio service Tunnel Protocol User Plan (GTP-U) layer;

(10) Internet Protocol (Internet Protocol, IP) layer;

(11) F1 application protocol layer.

In the embodiment of the present application, the method further includes: receiving second indication information sent by a network node of the non-terrestrial network; and adjusting the uplink transmit power of the terminal according to the second indication information.

Optionally, the second indication information is a transmission power control (Transmit power control, TPC) command, and the adjusting the uplink transmit power of the terminal according to the second indication information includes: according to the TPC command to adjust the uplink transmit power of the terminal, and the TPC command is determined by the network node of the non-terrestrial network according to the characteristics of the non-terrestrial network.

That is, in this embodiment of the present application, the TPC command used to modify the uplink power control of the PUCCH or PUSCH of the terminal transmit power can be redefined according to the characteristics of the non-terrestrial network, and the height of the network nodes of different non-terrestrial networks is caused. Different uplink transmit power requirements are related:

(1)0:-mdb;

(2) 1: 0 db;

(3)2: mdb;

(4)3: m+n db.

For example, the height of the network node of the non-terrestrial network is the 0th level height, the uplink transmission power is -m db, the height of the network node of the non-terrestrial network is the 1st level height, the uplink transmission power is 0db, and the network node of the non-terrestrial network The height of the network node is the second-level height, the uplink transmission power is m db, the height of the network node of the non-terrestrial network is the third-level height, and the uplink transmission power is m+n db.

Optionally, the second indication information is one or more parameter factors (or referred to as weights), and the adjustment of the uplink transmit power of the terminal according to the second indication information includes:

According to the characteristics of the non-terrestrial network (such as the height of the network node of the non-terrestrial network), the corresponding target parameter factor is determined from the one or more parameter factors; according to the target parameter factor and the TPC command, the terminal The uplink transmit power is adjusted.

That is, in this embodiment of the present application, the table of values in the cumulative value mode of PUSCH/PUCCH commanded by the TPC remains unchanged, and the network node of the non-terrestrial network sends one or more parameter factors corresponding to the heights of different network nodes to The terminal is selected and used according to the height of the network node of the non-terrestrial network.

In the embodiment of this application, a new PHR medium access control element (MAC CE) of a non-terrestrial network is designed, where the power headroom value and the maximum transmission power of the terminal are determined according to the value range defined in the new table. assign;

In the embodiment of the present application, the format of the MAC CE of the power headroom report includes a first field, and the first field indicates that the power headroom report is sent by the terminal to a network node of a non-terrestrial network. That is, a new logical channel label is designed to indicate the PHR MAC CE of this new non-terrestrial network, and three schemes are designed for this MAC CE as follows:

1) The first field is a power headroom (PH) field, and the number of bits in the PH field is greater than a first preset value.

That is, the number of bits of the PH field in the PHR MAC CE is increased, and the step size remains the original 1-2db.

2) The first field is a PH field, the number of bits in the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.

That is, evenly increasing the indicated step size of the existing PHR, the number of bits in the PH field remains 6 bits, but the granularity becomes thicker and the step size increases, that is, a table specially used for satellite communication is designed in the existing protocol. , used to describe the step size corresponding to each POWER_HEADROOM_m (power headroom_m);

3) The MAC CE further includes a second field, the first field and the second field are used to indicate that the power headroom report is sent by the terminal to the network node of the non-terrestrial network, and the first field indicates the first granularity. The power headroom level of the step size (PH level), the second field indicates the power headroom level of the step size of the second granularity, the first granularity (coarse granularity) is coarser than the second granularity (fine granularity).

That is, a field is added to the PHR MAC CE, that is, two fields are used to indicate the PHR, one field is used to indicate the PH level of the larger coarse-grained step size, and one field is used to indicate the smaller and more fine-grained step size. PH level.

In the embodiment of the present application, a PHR reporting trigger condition is added according to the characteristics of the non-terrestrial network. At the same time, a new PHR reporting configuration is designed. Compared with the PHR configuration in the current protocol, the indication range of the PH level is expanded, so that the PHR reporting mechanism can be better applied to non-terrestrial networks.

Referring to Figure 5, take Single Entry PHR MAC CE as an example. Among them, the PH field is increased by 1 bit, that is, the PH level that can be indicated becomes 128, which is doubled compared to the previous one.

Referring to FIG. 6 , the number of bits of the PH field is still kept as 6 bits, and the indication step size of the existing PHR is increased uniformly, for example, the range indicated by each PH level becomes 1～4db.

Referring to Figure 7, the number of bits in the PH1 field remains 6 bits, the indicated PH level step size is expanded to 1 to 16db, the PH2 field is 3 bits, and the indicated PH level step size is 1 to 2db, so combined with the PH1 network node, the UE can know Report PH which is a more refined range within the span of 16db. For example, PH1 indicates that PH is 1≤PH≤16db, and PH2 indicates 001, then it can be known that the actual PH is 3≤PH≤4db.

Referring to FIG. 8 , an embodiment of the present application provides a power control method for a non-terrestrial network, which is performed by a network node of the non-terrestrial network, including:

Step 801: Receive a power headroom report sent by the terminal when the trigger condition is met;

Wherein, the satisfying trigger condition includes one or more of the following:

(1) The terminal receives the first indication information sent by the network node of the non-terrestrial network;

(2) Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

(3) The type of the non-terrestrial network is changed;

(4) The terminal switches between the non-terrestrial network and the terrestrial network.

In this embodiment of the present application, the first indication information is sent by the network node of the non-terrestrial network when the virtual cell is added or changed; or, the first indication information is used to indicate the power headroom report to report. The mapping relationship between the pattern and the variation of the cell or beam of the network node of the non-terrestrial network.

In the embodiment of the present application, the method further includes:

Send second indication information to the terminal, where the second indication information instructs the terminal to adjust the uplink transmit power.

In the embodiment of the present application, the second indication information is a TPC command, and the TPC command is determined by the network node of the non-terrestrial network according to the characteristics of the non-terrestrial network;

or,

The second indication information is one or more parameter factors, the parameter factors are related to the characteristics of the non-terrestrial network, and the parameter factors and the TPC command instruct the terminal to adjust the uplink transmit power.

In the embodiment of the present application, the format of the MAC CE of the power headroom report includes a first field, and the first field indicates that the power headroom report is sent by the terminal to a network node of a non-terrestrial network.

In this embodiment of the present application, the first field is a PH field, and the number of bits of the PH field is greater than a first preset value;

or,

The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.

In this embodiment of the present application, the MAC CE further includes a second field, and the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, and the first field Indicates the power headroom level of the step size of the first granularity, and the second field indicates the power headroom level of the step size of the second granularity.

In this embodiment of the present application, the network node includes at least one of the following:

(a) space communication nodes;

(b) terrestrial network nodes;

Wherein, the space communication node and the ground network node communicate through a first interface;

The space communication node includes at least one of the following protocol layers or functions:

(1) Radio frequency unit;

(2) Physical layer;

(3) MAC layer;

(4) RLC layer;

(5) PDCP layer;

(6) SDAP layer;

(7) Xn AP layer;

(8) Gn AP layer;

(9) GTP-U layer;

(10) IP layer;

(11) F1AP layer.

In the embodiment of the present application, a PHR reporting trigger condition is added according to the characteristics of the non-terrestrial network. At the same time, a new PHR reporting configuration is designed. Compared with the PHR configuration in the current protocol, the indication range of the PH level is expanded, so that the PHR reporting mechanism can be better applied to non-terrestrial networks.

Referring to FIG. 9 , an embodiment of the present application provides a power control apparatus for a non-terrestrial network, and the apparatus 900 includes:

The first sending module 901 is configured to send a power headroom report to a network node of a non-terrestrial network when a trigger condition is met;

Wherein, the satisfying trigger condition includes one or more of the following:

(1) receiving the first indication information sent by the network node of the non-terrestrial network;

(2) Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

(3) The type of the non-terrestrial network is changed;

(4) The terminal switches between the non-terrestrial network and the terrestrial network.

In this embodiment of the present application, the first indication information is sent by a network node of the non-terrestrial network when a virtual cell is added or changed;

or,

The first indication information is used to indicate the mapping relationship between the pattern reported by the power headroom report and the change of the cell or the beam of the network node of the non-terrestrial network.

In this embodiment of the present application, the first indication information instructs the terminal to obtain ephemeris information;

The first sending module 901 is further configured to: send a power headroom report to the network node of the non-terrestrial network according to the ephemeris information.

In the embodiment of the present application, the first sending module 901 is further configured to: send a power headroom report to the network node of the non-terrestrial network according to the ephemeris information and the trajectory information of the terminal.

In this embodiment of the present application, the apparatus 900 further includes:

a first receiving module, configured to receive the second indication information sent by the network node of the non-terrestrial network;

An adjustment module configured to adjust the uplink transmit power of the terminal according to the second indication information.

In this embodiment of the present application, the second indication information is a TPC command, and the adjustment module is further configured to: adjust the uplink transmit power of the terminal according to the TPC command, where the TPC command is the non-transmitting power of the terminal. The network nodes of the terrestrial network are determined according to the characteristics of the non-terrestrial network.

In the embodiment of the present application, the adjustment module is further configured to: determine the corresponding target parameter factor from the one or more parameter factors according to the characteristics of the non-terrestrial network; The uplink transmit power of the terminal is adjusted.

In the embodiment of the present application, the format of the MAC CE of the power headroom report includes a first field, and the first field indicates that the power headroom report is sent by the terminal to a network node of a non-terrestrial network.

In this embodiment of the present application, the first field is a PH field, and the number of bits of the PH field is greater than a first preset value;

or,

The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.

In this embodiment of the present application, the MAC CE further includes a second field, and the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, and the first field Indicates the power headroom level of the step size of the first granularity, and the second field indicates the power headroom level of the step size of the second granularity.

In this embodiment of the present application, the network node includes at least one of the following:

(a) space communication nodes;

(b) terrestrial network nodes;

Wherein, the space communication node and the ground network node communicate through a first interface;

The space communication node includes at least one of the following protocol layers or functions:

(1) Radio frequency unit;

(2) Physical layer;

(3) MAC layer;

(4) RLC layer;

(5) PDCP layer;

(6) SDAP layer;

(7) Xn AP layer;

(8) Gn AP layer;

(9) GTP-U layer;

(10) IP layer;

(11) F1AP layer.

The apparatus provided in this embodiment of the present application can implement each process implemented by the method embodiment shown in FIG. 4 , and achieve the same technical effect. To avoid repetition, details are not repeated here.

Referring to FIG. 10 , an embodiment of the present application provides a power control apparatus for a non-terrestrial network. The apparatus 1000 includes:

The second receiving module 1001 is configured to receive a power headroom report sent by the terminal when the trigger condition is met;

Wherein, the satisfying trigger condition includes one or more of the following:

(1) receiving the first indication information sent by the network node of the non-terrestrial network;

(2) Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

(3) The type of the non-terrestrial network is changed;

(4) The terminal switches between the non-terrestrial network and the terrestrial network.

In this embodiment of the present application, the first indication information is sent by the network node of the non-terrestrial network when the virtual cell is added or changed; or, the first indication information is used to indicate the power headroom report to report. The mapping relationship between the pattern and the variation of the cell or beam of the network node of the non-terrestrial network.

In this embodiment of the present application, the apparatus 1000 further includes:

The second sending module is configured to send second indication information to the terminal, where the second indication information instructs the terminal to adjust the uplink transmit power.

In the embodiment of the present application, the second indication information is a TPC command, and the TPC command is determined by the network node of the non-terrestrial network according to the characteristics of the non-terrestrial network;

or,

The second indication information is one or more parameter factors, the parameter factors are related to the characteristics of the non-terrestrial network, and the parameter factors and the TPC command instruct the terminal to adjust the uplink transmit power.

In the embodiment of the present application, the format of the MAC CE of the power headroom report includes a first field, and the first field indicates that the power headroom report is sent by the terminal to a network node of a non-terrestrial network.

In this embodiment of the present application, the first field is a PH field, and the number of bits of the PH field is greater than a first preset value;

or,

The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.

In this embodiment of the present application, the MAC CE further includes a second field, and the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, and the first field Indicates the power headroom level of the step size of the first granularity, and the second field indicates the power headroom level of the step size of the second granularity.

In this embodiment of the present application, the network node includes at least one of the following:

(a) space communication nodes;

(b) terrestrial network nodes;

Wherein, the space communication node and the ground network node communicate through a first interface;

The space communication node includes at least one of the following protocol layers or functions:

(1) Radio frequency unit;

(2) Physical layer;

(3) MAC layer;

(4) RLC layer;

(5) PDCP layer;

(6) SDAP layer;

(7) Xn AP layer;

(8) Gn AP layer;

(9) GTP-U layer;

(10) IP layer;

(11) F1AP layer.

The apparatus provided in this embodiment of the present application can implement each process implemented by the method embodiment shown in FIG. 8 , and achieve the same technical effect. To avoid repetition, details are not repeated here.

11 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application. The terminal 1100 includes but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user Input unit 1107, interface unit 1108, memory 1109, and processor 1110 and other components.

Those skilled in the art can understand that the terminal 1100 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1110 through a power management system, so as to manage charging, discharging, and power consumption through the power management system management and other functions. The terminal structure shown in FIG. 11 does not constitute a limitation on the terminal, and the terminal may include more or less components than shown, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in this embodiment of the present application, the input unit 1104 may include a graphics processor (Graphics Processing Unit, GPU) 11041 and a microphone 11042. Such as camera) to obtain still pictures or video image data for processing. The display unit 1106 may include a display panel 11061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1107 includes a touch panel 11071 and other input devices 11072 . The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts, a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

In the embodiment of the present application, the radio frequency unit 1101 receives the downlink data from the network side device, and then processes it to the processor 1110; in addition, sends the uplink data to the network side device. Generally, the radio frequency unit 1101 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.

Memory 1109 may be used to store software programs or instructions as well as various data. The memory 1109 may mainly include a stored program or instruction area and a storage data area, wherein the stored program or instruction area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.) and the like. In addition, the memory 1109 may include a high-speed random access memory, and may also include a non-volatile memory, wherein the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM) , PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. For example at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

The processor 1110 may include one or more processing units; optionally, the processor 1110 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs or instructions, etc. Modem processors mainly deal with wireless communications, such as baseband processors. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 1110.

The terminal provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in FIG. 4 , and achieve the same technical effect. To avoid repetition, details are not repeated here.

The embodiment of the present application also provides a network side device. As shown in FIG. 12 , the network side device 1200 includes: an antenna 1201 , a radio frequency device 1202 , and a baseband device 1203 . The antenna 1201 is connected to the radio frequency device 1202 . In the uplink direction, the radio frequency device 1202 receives information through the antenna 1201, and sends the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes the information to be sent and sends it to the radio frequency device 1202 , and the radio frequency device 1202 processes the received information and sends it out through the antenna 1201 .

The above-mentioned frequency band processing apparatus may be located in the baseband apparatus 1203 , and the method performed by the network side device in the above embodiments may be implemented in the baseband apparatus 1203 . The baseband apparatus 1203 includes a processor 1204 and a memory 1205 .

The baseband device 1203 may include, for example, at least one baseband board on which a plurality of chips are arranged, as shown in FIG. 12 , one of the chips is, for example, the processor 1204 , which is connected to the memory 1205 to call the program in the memory 1205 to execute The network devices shown in the above method embodiments operate.

The baseband device 1203 may further include a network interface 1206 for exchanging information with the radio frequency device 1202, and the interface is, for example, a common public radio interface (CPRI for short).

Specifically, the network-side device in this embodiment of the present application further includes: instructions or programs that are stored in the memory 1205 and run on the processor 1204, and the processor 1204 invokes the instructions or programs in the memory 1205 to execute the modules shown in FIG. 10 . The implementation method and achieve the same technical effect, in order to avoid repetition, it is not repeated here.

The network-side device provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in FIG. 8 , and achieve the same technical effect. To avoid repetition, details are not repeated here.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, each process of the method embodiment shown in FIG. 4 or FIG. 8 is implemented. , and can achieve the same technical effect, in order to avoid repetition, it is not repeated here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The steps of the method or algorithm described in conjunction with the disclosure of the present application may be implemented in a hardware manner, or may be implemented in a manner of executing software instructions on a processor. The software instructions may be composed of corresponding software modules, and the software modules may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may be carried in an ASIC. Alternatively, the ASIC may be carried in the core network interface device. Of course, the processor and the storage medium may also exist in the core network interface device as discrete components.

Those skilled in the art should appreciate that, in one or more of the above examples, the functions described in this application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above descriptions are only specific embodiments of the present application, and are not intended to limit the The protection scope, any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present application shall be included within the protection scope of the present application.

Those skilled in the art should understand that the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (24)

1. A power control method for a non-terrestrial network, performed by a terminal, comprising:

   When the trigger condition is met, send a power headroom report to the network node of the non-terrestrial network;

   Wherein, the satisfying trigger condition includes one or more of the following:

   receiving the first indication information sent by the network node of the non-terrestrial network;

   Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

   a change in the type of said non-terrestrial network;

   The terminal switches between a non-terrestrial network and a terrestrial network.
2. The method of claim 1, wherein,

   the first indication information is sent by the network node of the non-terrestrial network when the virtual cell is added or changed;

   or,

   The first indication information is used to indicate the mapping relationship between the pattern reported by the power headroom report and the change of the cell or the beam of the network node of the non-terrestrial network.
3. The method according to claim 1, wherein the first indication information instructs the terminal to obtain ephemeris information;

   The sending a power headroom report to a network node of a non-terrestrial network includes:

   Based on the ephemeris information, a power headroom report is sent to a network node of the non-terrestrial network.
4. The method of claim 3, wherein sending a power headroom report to a network node of the non-terrestrial network based on the ephemeris information comprises:

   According to the ephemeris information and the trajectory information of the terminal, a power headroom report is sent to the network node of the non-terrestrial network.
5. The method of claim 1, wherein the method further comprises:

   receiving second indication information sent by the network node of the non-terrestrial network;

   According to the second indication information, the uplink transmit power of the terminal is adjusted.
6. The method according to claim 5, wherein the second indication information is a transmission power control TPC command, and the adjusting the uplink transmit power of the terminal according to the second indication information comprises:

   The uplink transmit power of the terminal is adjusted according to the TPC command, where the TPC command is determined by the network node of the non-terrestrial network according to the characteristics of the non-terrestrial network.
7. The method according to claim 5, wherein the second indication information is one or more parameter factors, and the adjusting the uplink transmit power of the terminal according to the second indication information comprises:

   determining a corresponding target parameter factor from the one or more parameter factors according to the characteristics of the non-terrestrial network;

   The uplink transmit power of the terminal is adjusted according to the target parameter factor and the TPC command.
8. The method according to claim 1, wherein the format of the medium access control control unit (MAC CE) of the power headroom report includes a first field indicating that the first field is sent by the terminal to a network node of a non-terrestrial network Power headroom report.
9. The method according to claim 8, wherein the first field is a power headroom PH field, and the number of bits of the PH field is greater than a first preset value;

   or,

   The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.
10. The method according to claim 8, wherein the MAC CE further comprises a second field, the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, the The first field indicates the power headroom level of the step size of the first granularity, and the second field indicates the power headroom level of the step size of the second granularity.
11. The method of claim 1, wherein the network node comprises at least one of the following:

    space communication node;

    ground network nodes;

    Wherein, the space communication node and the ground network node communicate through a first interface;

    The space communication node includes at least one of the following protocol layers or functions:

    radio frequency unit;

    physical layer;

    MAC layer;

    RLC layer;

    PDCP layer;

    SDAP layer;

    Xn application protocol layer;

    Gn application protocol layer;

    GTP-U layer;

    IP layer;

    F1 application protocol layer.
12. A power control method for a non-terrestrial network, performed by a network node of the non-terrestrial network, comprising:

    Receiving the power headroom report sent by the terminal when the trigger condition is met;

    Wherein, the satisfying trigger condition includes one or more of the following:

    receiving the first indication information sent by the network node of the non-terrestrial network;

    Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

    a change in the type of said non-terrestrial network;

    The terminal switches between a non-terrestrial network and a terrestrial network.
13. The method of claim 12, wherein,

    the first indication information is sent by the network node of the non-terrestrial network when the virtual cell is added or changed;

    or,

    The first indication information is used to indicate the mapping relationship between the pattern reported by the power headroom report and the change of the cell or the beam of the network node of the non-terrestrial network.
14. The method of claim 12, wherein the method further comprises:

    Send second indication information to the terminal, where the second indication information instructs the terminal to adjust the uplink transmit power.
15. The method according to claim 14, wherein the second indication information is a TPC command, and the TPC command is determined by a network node of the non-terrestrial network according to characteristics of the non-terrestrial network;

    or,

    The second indication information is one or more parameter factors, the parameter factors are related to the characteristics of the non-terrestrial network, and the parameter factors and the TPC command instruct the terminal to adjust the uplink transmit power.
16. The method of claim 12, wherein the format of the MAC CE of the power headroom report includes a first field indicating that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network.
17. The method according to claim 16, wherein the first field is a PH field, and the number of bits of the PH field is greater than a first preset value;

    or,

    The first field is a PH field, the number of bits of the PH field is a second preset value, and the step size indicated by the PH field is greater than a third preset value.
18. The method according to claim 16, wherein the MAC CE further comprises a second field, the first field and the second field are used to indicate that it is a power headroom report sent by the terminal to a network node of a non-terrestrial network, the The first field indicates the power headroom level of the step size of the first granularity, and the second field indicates the power headroom level of the step size of the second granularity.
19. The method of claim 12, wherein the network node comprises at least one of the following:

    space communication node;

    ground network nodes;

    Wherein, the space communication node and the ground network node communicate through the first interface;

    The space communication node includes at least one of the following protocol layers or functions:

    radio frequency unit;

    physical layer;

    MAC layer;

    RLC layer;

    PDCP layer;

    SDAP layer;

    Xn application protocol layer;

    Gn application protocol layer;

    GTP-U layer;

    IP layer;

    F1 application protocol layer.
20. A power control device for a non-terrestrial network, comprising:

    a first sending module, configured to send a power headroom report to a network node of a non-terrestrial network when a trigger condition is met;

    Wherein, the satisfying trigger condition includes one or more of the following:

    receiving the first indication information sent by the network node of the non-terrestrial network;

    Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

    a change in the type of said non-terrestrial network;

    The terminal switches between the non-terrestrial network and the terrestrial network.
21. A power control device for a non-terrestrial network, comprising:

    a second receiving module, configured to receive a power headroom report sent by the terminal when the trigger condition is met;

    Wherein, the satisfying trigger condition includes one or more of the following:

    receiving the first indication information sent by the network node of the non-terrestrial network;

    Reaching the reporting threshold of the power headroom report of the non-terrestrial network;

    a change in the type of said non-terrestrial network;

    The terminal switches between a non-terrestrial network and a terrestrial network.
22. A terminal, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, the program being executed by the processor to implement any one of claims 1 to 11 the steps of the method.
23. A network-side device, comprising: a processor, a memory, and a program stored on the memory and running on the processor, the program being executed by the processor to implement any one of claims 12 to 19 A step of the method.
24. A readable storage medium having a program stored on the readable storage medium, when the program is executed by a processor, implements steps including the method according to any one of claims 1 to 19.

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