Resource coexistence method and apparatus

Abstract

An embodiment of the present invention provides a resource coexistence method and apparatus, including a step of a first node determining a time-frequency resource of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner. In the embodiment of the present invention, the first node determines a time-frequency resource of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner, thereby avoiding resource contention or interference that occurs during resource coexistence of LTE V2X and NR V2X.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The embodiments of the present invention relate to the field of communications, and in particular to a resource coexistence method and apparatus. [Background technology]

[0002] With the continuous progress of wireless technology, various wireless services have appeared in large quantities, and in addition to the cellular service between the base station and the terminal, the LTE (Long Term Evolution) and NR (New Radio) systems also include, for example, V2X (Vehicle to anything) services, which are abbreviated as LTE V2X, LTE-V, or LTE sidelink in LTE, and as NR V2X, NR-V, or NR sidelink in NR. The link of V2X service communication is called SL (Side link), and when a service needs to be transmitted between devices, the service data between the devices is not transferred via other network devices, but is directly transmitted from the data source device to the target device, that is, the devices communicate directly with each other, and the device is a UE (User Equipment) having a V2X function. SL can be classified into three main types of communication scenes: a first type of scene (incoverage) where both the data source device and the target device are within the coverage of the base station; a second type of scene (partial coverage) where one of the data source device and the target device is within the coverage of the base station but the other is outside the coverage of the base station; and a third type of scene (out of coverage) where both the data source device and the target device are outside the coverage of the base station.SL can be classified into two main communication modes: a first mode (abbreviated as mode 3 in LTE and mode 1 in NR) in which the resources for the device to transmit sidelink signals are derived from the base station's scheduling; and a second mode (abbreviated as mode 4 in LTE and mode 2 in NR) in which the device autonomously selects resources in a resource pool configured or preconfigured in the network based on a resource selection policy, where the resource selection policy mainly includes a sensing mechanism, a partial sensing mechanism, and a random selection mechanism.

[0003] In V2X deployment scenarios related to the latest NR system, it is necessary to consider that LTE V2X and NR V2X devices will coexist within the same frequency resource, which generally refers to the same carrier, the same frequency band, etc. In order to allow two different types of devices to coexist within the same frequency resource, a mechanism is required to effectively utilize the resource and avoid interference that occurs during resource coexistence without adversely affecting the operation of both devices. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present invention provide a resource coexistence method and apparatus to at least solve the problem of resource contention or interference caused by the coexistence of LTE V2X and NR V2X in the same frequency resource in the related art. [Means for solving the problem]

[0005] According to one embodiment of the present invention, there is provided a resource coexistence method, including a step of a first node determining, by a reporting manner or an autonomous manner, time-frequency resources of LTE V2X or NR V2X to be used.

[0006] According to another embodiment of the present invention, there is provided a resource coexistence device, including a determination module configured to determine LTE V2X or NR V2X time-frequency resources to be used by a reporting manner or an autonomous manner.

[0007] According to yet another embodiment of the present invention there is further provided a computer readable storage medium having stored thereon a computer program which, when executed, is arranged to perform the steps of any one of the method embodiments described above.

[0008] According to yet another embodiment of the present invention, there is further provided an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor is configured to perform the steps of any one of the method embodiments described above by executing the computer program. [Brief description of the drawings]

[0009] [Figure 1] 2 is a block diagram showing the hardware structure of a mobile terminal that executes a resource coexistence method according to an embodiment of the present invention; [Diagram 2] 4 is a flowchart of a resource coexistence method according to an embodiment of the present invention. [Diagram 3] 4 is a flow chart of a reporting method according to an embodiment of the present invention. [Figure 4] 4 is a flowchart of another reporting method according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a flow diagram of an autonomous method according to an embodiment of the present invention; [Figure 6] FIG. 2 is a diagram illustrating a module structure of a resource coexistence device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings together with examples. In addition, the terms "first", "second", etc. in the specification, claims and the above drawings of the present invention are intended to distinguish between similar objects and are not intended to describe a specific order or chronological order.

[0011] The method embodiment provided by the embodiment of the present application may be executed in a mobile terminal, a computer terminal or a similar computing device. Taking execution in a mobile terminal as an example, FIG. 1 is a block diagram showing a hardware structure of a mobile terminal executing a resource coexistence method according to an embodiment of the present invention. As shown in FIG. 1, the mobile terminal may include one or more (only one is shown in FIG. 1) processors 102 (processor 102 includes but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, but the mobile terminal may further include a transmission device 106 and an input / output device 108 used for communication functions. As can be understood by those skilled in the art, the structure shown in FIG. 1 is merely exemplary and does not limit the structure of the mobile terminal. For example, the mobile terminal may further include more or less components than those shown in FIG. 1, or have a different configuration from that shown in FIG. 1.

[0012] The memory 104 is used to store computer programs, such as software programs and modules of application software, such as a computer program corresponding to the resource coexistence method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing, i.e., realizes the above-mentioned method, by executing the computer programs stored in the memory 104. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memories or other non-volatile solid-state memories. In some embodiments, the memory 104 may further include memories located remotely to the processor 102, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0013] The transmission device 106 is used to transmit and receive data via a network. An example of the network may include a wireless network provided by a communication supplier of the mobile terminal. In one example, the transmission device 106 includes a network adapter (abbreviated as Network Interface Controller, NIC) that is connected to other network devices via a base station and can communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (abbreviated as RF) module for wirelessly communicating with the Internet.

[0014] In this embodiment, a resource coexistence method is provided, which is executed in the mobile terminal. FIG. 2 is a flowchart of the method according to the embodiment of the present invention. As shown in FIG. 2, the flow includes the following steps:

[0015] Step S202: The first node determines the time-frequency resources of LTE V2X or NR V2X to be used through a reporting manner or an autonomous manner.

[0016] In this embodiment, the reporting scheme may include the schemes shown in FIG. 3 and FIG. As shown in FIG. 3, the reporting method includes the following steps:

[0017] S302: The first node reports to the second node, and the report contents may include one of the following: whether or not a resource contention exists, the type of resource contention, whether or not interference exists, the type of interference, the level of interference, the location of the time-frequency resource of the interference, the location of the desired or candidate time-frequency resource, whether or not to reduce the desired power, and the absolute power value or the relative power value of the desired power reduction.

[0018] S304: The second node reconfigures or reselects time-frequency resources of LTE V2X or NR V2X.

[0019] As shown in FIG. 4, the reporting method includes the following steps: S402: The physical layer of the first node reports to an upper layer of the first node, and the contents of the report may include one of the following: whether or not a resource contention exists, the type of resource contention, whether or not interference exists, the type of interference, the level of interference, the location of the time-frequency resource of the interference, the location of the desired or candidate time-frequency resource, whether or not to reduce the desired power, and the absolute power value or the relative power value of the desired power reduction.

[0020] S404: The upper layer of the first node reconfigures or reselects time-frequency resources of LTE V2X or NR V2X.

[0021] In this embodiment, the type of resource conflict includes at least one of a conflict between an LTE V2X transmission resource and an NR V2X transmission resource, a conflict between an LTE V2X transmission resource and an NR V2X reception resource, a conflict between an LTE V2X reception resource and an NR V2X transmission resource, and a conflict between an LTE V2X reception resource and an NR V2X reception resource.

[0022] In this embodiment, the type of interference includes at least one of interference from NR V2X to LTE V2X and interference from LTE V2X to NR V2X.

[0023] In one exemplary embodiment, the level of interference is differentiated by distinguishing one or more interference levels based on one or more thresholds, where the thresholds include at least one of: received signal power, received signal strength.

[0024] In one exemplary embodiment, when LTE V2X and NR V2X coexist in a time division multiplexing (TDM) manner, when resource contention or interference exists between LTE V2X and NR V2X, a set of NR V2X time resources is selected from multiple sets of preconfigured NR V2X time resources. The partitioned time resources may include those used only for LTE V2X, those used only for NR V2X, and those shared by LTE V2X and NR V2X. The granularity of the time resources includes at least one of a short slot, a slot, a subframe, a half frame, and a radio frame.

[0025] In one exemplary embodiment, when LTE V2X and NR V2X TDM coexist in a frequency division multiplexing (FDM) manner, when resource contention or interference exists between LTE V2X and NR V2X, a set of NR V2X frequency resources is selected from multiple sets of pre-configured NR V2X frequency resources. The partitioned frequency resources may include those used only for LTE V2X, those used only for NR V2X, and those shared by LTE V2X and NR V2X. The granularity of the frequency resources includes at least one of a resource block, a resource block group, a band width part, a subchannel, a subband, a carrier, and a frequency band.

[0026] In one example embodiment, when LTE V2X and NR V2X employ coexistence using frequency division multiplexing, power is allocated to LTE V2X and NR V2X in one of the following ways: determining power allocation based on priorities of LTE V2X and NR V2X; allocating power by prioritizing LTE V2X and NR V2X alternately; allocating power by prioritizing LTE V2X; or allocating power by prioritizing NR V2X.

[0027] In this embodiment, when there is resource contention or available resources in LTE V2X and NR V2X, the first node may determine the resources to be used by an autonomous manner. As shown in FIG. 5, the autonomous manner includes the following steps:

[0028] S502: Determine that resource contention or available resources exist in LTE V2X and NR V2X.

[0029] S504: The first node autonomously determines the resources to be used. Specifically, in one embodiment, the NR V2X module of the first node monitors the NR V2X SCI of other nodes and notifies the LTE V2X module of the first node of the location of available time-frequency resources, and the LTE V2X module of the first node uses the available time-frequency resources.

[0030] In another example embodiment, determining LTE V2X or NR V2X time-frequency resources for autonomous use by a first node includes an NR V2X module of the first node monitoring LTE V2X SCIs of other nodes to obtain available time-frequency resources, and an NR V2X module of the first node using the available time-frequency resources.

[0031] In another example embodiment, determining LTE V2X or NR V2X time-frequency resources to be autonomously used by the first node includes selecting a set of NR V2X time resources from multiple sets of pre-configured NR V2X time resources when resource contention or interference exists between LTE V2X and NR V2X.

[0032] In the above embodiment of the present invention, when LTE V2X and NR V2X coexist in the same frequency resource, the first node determines the time-frequency resource of LTE V2X or NR V2X to be used through a reporting manner or an autonomous manner, thereby avoiding resource contention or interference that occurs when LTE V2X and NR V2X resources coexist, and further resolving problems such as power sharing, power control, and power adjustment reporting during coexistence.

[0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to easily understand the technical solutions provided by the present invention, the present invention will be described in detail below with reference to specific scenarios.

[0034] Example 1 In this embodiment, when LTE V2X and NR V2X coexist in a TDM manner and resource contention exists between LTE V2X and NR V2X, the time resources of LTE V2X and NR V2X are reconfigured or reselected.

[0035] In this embodiment, there are multiple sets of pre-configured NR V2X time resources, and when a resource conflict exists between LTE V2X and NR V2X, another set of time resources can be selected for NR V2X in the resource conflict.

[0036] In this embodiment, the time resource regions can be divided into three types, corresponding to use only for LTE V2X, use only for NR V2X, and sharing for LTE V2X and NR V2X, respectively.

[0037] In this embodiment, the granularity of the time resource is preferably a short slot (mini-slot, short-slot), a slot, a subframe, a half-frame, or a radio frame.

[0038] Example 2 In this embodiment, when LTE V2X and NR V2X coexist using the FDM method and resource contention exists between LTE V2X and NR V2X, frequency resources for LTE V2X and NR V2X are reconfigured or reselected.

[0039] In this embodiment, there are multiple sets of pre-configured NR V2X frequency resources, and when resource conflict exists between LTE V2X and NR V2X, the NR V2X can avoid the resource conflict by selecting another set of frequency resources.

[0040] In this embodiment, the frequency resource regions can be divided into three types, corresponding to use only for LTE V2X, use only for NR V2X, and sharing for LTE V2X and NR V2X, respectively.

[0041] In this embodiment, the granularity of the frequency resource is preferably a resource block, a resource block group, a bandwidth part, a sub channel, a sub band, a carrier, or a frequency band.

[0042] In this embodiment, when LTE V2X and NR V2X coexist using FDM, the power allocation is as follows: A method of determining power allocation based on the priority of LTE V2X and NR V2X, i.e., allocating power preferentially to V2X with higher priority; A method of allocating power alternately between LTE V2X and NR V2X, i.e., if power was allocated preferentially to one of LTE V2X and NR V2X in the previous time, power will be allocated preferentially to the other V2X in the next time. A method of allocating power with priority to LTE V2X, One of the methods will be adopted to allocate power with priority to NR V2X.

[0043] Example 3 In this embodiment, resource contention or interference caused by resource coexistence of LTE V2X and NR V2X is resolved with the assistance of equipment.

[0044] Specifically, the second device measures the service load status and reports it to the first device (base station or terminal device), or the physical layer of the second device reports it to a higher layer than the physical layer of the second device, and the higher layer of the first device or the second device reconfigures or reselects LTE V2X and NR V2X resources.

[0045] In this embodiment, the service load situation can be determined by measuring the CBR (Channel Busy Ratio) or evaluating the CR (Channel Occupancy Ratio).

[0046] In this embodiment, the contents reported by the second device may include one of: whether or not a resource contention exists, the type of resource contention, whether or not interference exists, the type of interference, the level of interference, the location of the time-frequency resource of the interference, the location of the desired or candidate time-frequency resource, whether the desired power is reduced, and the absolute power value or the relative power value of the reduction in the desired power.

[0047] Example 4 In this embodiment, in order to resolve resource contention or interference due to resource coexistence between LTE V2X and NR V2X, available resources are used for LTE V2X.

[0048] Specifically, the NR V2X module decodes the SCI for scheduling NR V2X and determines whether there are available resources in the subsequent resources based on the monitoring result, and the LTE V2X module obtains the monitoring result, for example, whether there are available sub-channel resources, and if so, performs LTE V2X transmission using these resources.

[0049] Or, the NR V2X module decodes the NR V2X SCI of the other node, the LTE V2X module decodes the LTE V2X SCI of the other node, the NR V2X module merges the monitoring results, and the LTE V2X module obtains the monitoring results, e.g., whether there are available subchannel resources, and if so, performs LTE V2X transmission using these resources.

[0050] Example 5: Use of available resources for NR V2X In this embodiment, the NR V2X module decodes the SCI for scheduling LTE V2X, and determines whether there are available resources in the subsequent resources based on the monitoring result, for example, whether there are available sub-channel resources, and if so, performs NR V2X transmission using these resources.

[0051] Alternatively, the NR V2X module decodes the LTE V2X SCI of the other node, the NR V2X module decodes the NR V2X SCI of the other node, the LTE V2X module decodes the LTE V2X SCI of the other node, the NR V2X module merges the monitoring results, and the NR V2X module determines whether there are available resources in the subsequent resources based on the monitoring results, for example, whether there are available sub-channel resources, and if there are, performs NR V2X transmission using these resources.

[0052] In the above embodiment of the present invention, decoding of the SCI, and monitoring and sensing of the SCI are all equivalent concepts.

[0053] From the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be realized by a combination of software and a necessary general-purpose hardware platform, and of course can also be realized by hardware, and in many cases, the former is a more preferred embodiment. Based on this understanding, the technical solution of the present invention can be essentially or in part contributed to the prior art embodied in the form of a software product, and the computer software product is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes some instructions for a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods according to the embodiments of the present invention.

[0054] This embodiment further provides a resource coexistence device for realizing the above embodiment and preferred embodiment, and the description of the already described one will be omitted. The term "module" used below can realize a combination of software and / or hardware of a certain function. The device described in the following embodiment is preferably realized by software, but it can also be realized and conceived by hardware or a combination of software and hardware.

[0055] FIG. 6 is a block diagram showing a module structure of a resource coexistence apparatus according to an embodiment of the present invention. As shown in FIG.

[0056] The determination module 10 is configured to determine the time-frequency resources of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner.

[0057] In this embodiment, the contents of the report may include one of the following: whether or not a resource contention exists, the type of resource contention, whether or not interference exists, the type of interference, the level of interference, the location of the time-frequency resource of the interference, the location of the desired or candidate time-frequency resource, whether to reduce the desired power, and the absolute power value or the relative power value of the desired power reduction.

[0058] In this embodiment, the type of resource conflict includes at least one of a conflict between an LTE V2X transmission resource and an NR V2X transmission resource, a conflict between an LTE V2X transmission resource and an NR V2X reception resource, a conflict between an LTE V2X reception resource and an NR V2X transmission resource, and a conflict between an LTE V2X reception resource and an NR V2X reception resource.

[0059] Each of the above modules can be realized by software or hardware, and in the latter case, the modules can be all located within the same processor, or the modules can be each located within a different processor in any combination, but is not limited to this.

[0060] An embodiment of the present invention further provides a computer readable storage medium having stored thereon a computer program which, when executed, is arranged to perform the steps of any one of the method embodiments described above.

[0061] In one exemplary embodiment, the computer-readable storage medium may be, but is not limited to, a medium capable of storing various computer programs, such as a USB disk, a read-only memory (abbreviated as ROM), a random access memory (abbreviated as RAM), a removable hard disk, a magnetic disk, or an optical disk.

[0062] An embodiment of the present invention further provides an electronic device comprising a memory and a processor, the memory having a computer program stored therein, the processor being arranged to perform the steps of any one of the method embodiments described above by executing the computer program.

[0063] In one exemplary embodiment, the electronic device may further include a transmission device coupled to the processor, and an input / output device coupled to the processor.

[0064] For specific examples in this embodiment, reference can be made to the examples described in the above embodiments and exemplary embodiments, and therefore repeated explanations will be omitted in this embodiment.

[0065] As will be understood by those skilled in the art, each module or step in the above-described embodiments of the present invention can be implemented by a general-purpose computing device, can be centralized in a single computing device, or can be distributed across a network of multiple computing devices, can be implemented by a computing device executable program code, and can be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described can be executed in a different order than shown here, or can be implemented by creating each of them in a separate integrated circuit module, or by creating multiple modules or steps among them in a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

[0066] The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The first node determines a time-frequency resource of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner; A resource coexistence method comprising:

2. The reporting method includes reporting from the first node to the second node, or reporting from a physical layer of the first node to an upper layer of the first node; The report included the following: Whether or not there is resource contention The type of resource contention, Whether interference is present, Type of interference, The level of interference, The location of the time-frequency resource of the interference; the location of desired or candidate time-frequency resources; Whether to reduce the desired power, including at least one of an absolute power value or a relative power value of the desired power reduction; 2. The method of claim 1 .

3. The type of resource contention includes at least one of a contention between an LTE V2X transmission resource and an NR V2X transmission resource, a contention between an LTE V2X transmission resource and an NR V2X reception resource, a contention between an LTE V2X reception resource and an NR V2X transmission resource, and a contention between an LTE V2X reception resource and an NR V2X reception resource; 3. The method of claim 2 .

4. The type of interference includes at least one of interference from NR V2X to LTE V2X, and interference from LTE V2X to NR V2X; 3. The method of claim 2 .

5. The level of interference is differentiated by distinguishing one or more interference levels based on one or more thresholds; The threshold value includes at least one of a received signal power and a received signal strength.

3. The method of claim 2 .

6. after a report from the first node to a second node or a report from a physical layer of the first node to an upper layer of the first node, The method further includes a step in which the second node or an upper layer of the first node resets or reselects time-frequency resources of LTE V2X or NR V2X; 5. The method according to claim 3 or 4.

7. A step of the second node or an upper layer of the first node resetting or reselecting a time-frequency resource of LTE V2X or NR V2X, When resource contention or interference exists between LTE V2X and NR V2X, selecting a set of NR V2X time resources from a plurality of sets of pre-configured NR V2X time resources; 7. The method of claim 6.

8. The partitioned time resources include those used only for LTE V2X, those used only for NR V2X, and those shared by LTE V2X and NR V2X.

8. The method of claim 7.

9. The granularity of the time resource includes at least one of a short slot, a slot, a subframe, a half frame, and a radio frame; 9. The method of claim 8.

10. A step of the second node or an upper layer of the first node resetting or reselecting a time-frequency resource of LTE V2X or NR V2X, When resource contention or interference exists between LTE V2X and NR V2X, selecting a set of NR V2X frequency resources from a plurality of sets of pre-configured NR V2X frequency resources; 7. The method of claim 6.

11. The divided frequency resources include those used only for LTE V2X, those used only for NR V2X, and those shared by LTE V2X and NR V2X.

11. The method of claim 10.

12. The granularity of the frequency resource includes at least one of a resource block, a resource block group, a partial bandwidth, a subchannel, a subband, a carrier, and a frequency band; 12. The method of claim 11 .

13. When LTE V2X and NR V2X adopt coexistence using frequency division multiplexing, A method for determining power allocation based on LTE V2X and NR V2X priorities; A method of allocating power alternately and preferentially to LTE V2X and NR V2X; A method of allocating power with priority to LTE V2X; and allocating power to LTE V2X and NR V2X in one of the following ways: allocating power in preference to NR V2X; 3. The method of claim 2 .

14. The step of the first node determining the time-frequency resource of LTE V2X or NR V2X to be used in an autonomous manner includes: When resource contention or interference exists between LTE V2X and NR V2X, selecting a set of NR V2X time resources from a plurality of sets of pre-configured NR V2X time resources; 2. The method of claim 1 .

15. The step of the first node determining the time-frequency resource of LTE V2X or NR V2X to be used in an autonomous manner includes: The NR V2X module of the first node monitors the NR V2X SCI of other nodes and notifies the LTE V2X module of the first node of the location of available time-frequency resources; an LTE V2X module of the first node using the available time-frequency resources; 2. The method of claim 1 .

16. The step of the first node determining the time-frequency resource of LTE V2X or NR V2X to be used in an autonomous manner includes: The NR V2X module of the first node monitors the LTE V2X SCI of other nodes to obtain available time-frequency resources; and a NR V2X module of the first node using the available time-frequency resources.

2. The method of claim 1 .

17. A determination module configured to determine a time-frequency resource of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner; A resource coexistence device comprising:

18. The report included the following: Whether or not there is resource contention The type of resource contention, Whether interference is present, Type of interference, The level of interference, The location of the time-frequency resource of the interference; the location of desired or candidate time-frequency resources; Whether to reduce the desired power, including at least one of an absolute power value or a relative power value of the desired power reduction; 20. The apparatus of claim 17 .

19. The type of resource contention includes at least one of a contention between an LTE V2X transmission resource and an NR V2X transmission resource, a contention between an LTE V2X transmission resource and an NR V2X reception resource, a contention between an LTE V2X reception resource and an NR V2X transmission resource, and a contention between an LTE V2X reception resource and an NR V2X reception resource; 20. The apparatus of claim 18 .

20. A computer-readable storage medium on which a computer program is stored, The computer program implements the steps of the method according to any one of claims 1 to 16 when executed by a processor. A computer-readable storage medium comprising:

21. A computer program comprising: a memory; a processor; and a computer program stored in the memory and executable by the processor; 17. The method according to claim 1, wherein the processor, when executing the computer program, performs the steps of the method according to any one of claims 1 to 16.

1. An electronic device comprising:

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