WO2024092770A1

WO2024092770A1 - Method of determining applicable area of ptm configuration for ue receiving multicast in rrc inactive state and apparatuses

Info

Publication number: WO2024092770A1
Application number: PCT/CN2022/130035
Authority: WO
Inventors: Xin Zhang
Original assignee: Shenzhen Tcl New Technology Co., Ltd.
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2024-05-10

Abstract

A method of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state performed by the UE includes receiving, by the UE, an indication associated with an area and/or the PTM configuration.

Description

METHOD OF DETERMINING APPLICABLE AREA OF PTM CONFIGURATION FOR UE RECEIVING MULTICAST IN RRC INACTIVE STATE AND APPARATUSES

BACKGROUND OF DISCLOSURE

1. Field of the Disclosure

The present disclosure relates to the field of wireless communication systems, and more particularly, to wireless communication methods for multicast/broadcast service (MBS) and apparatuses, for example, particularly to an MBS system.

2. Description of the Related Art

To enable resource-efficient delivery of multicast/broadcast services, 3GPP has developed NR broadcast/multicast in Rel-17 according to a work item (WID) , aiming to enable general MBS services over 5GS. The use cases identified that could benefit from this feature include public safety and mission critical, V2X applications, IPTV, live video, software delivery over wireless and IoT applications, etc. Two delivery modes have been agreed for Rel-17 MBS with delivery mode 1 (only for multicast) capable of addressing higher QoS services and delivery mode 2 (only for broadcast) focusing on lower QoS services. Given that Rel-17 MBS already provide the basic function to support MBS services, the general main goal for Rel-18 should be to enable better deployment of MBS, such as improvement of resource efficiency and capacity based on Rel-17 MBS.

In Rel-17, RAN only specifies multicast for UEs in RRC_CONNECTED state, which may not fully fulfil the requirements of, e.g., mission critical services, especially for cells with a large number of UEs according to TR 23.774. Also, to always keep UEs in RRC_CONNECTED state is not power efficient. It is therefore important to support multicast for UEs in RRC_INACTIVE.

Therefore, there is a need for methods of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state and apparatuses.

SUMMARY

An object of the present disclosure is to propose methods of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state and apparatuses.

In a first aspect of the present disclosure, a method of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state performed by the UE includes receiving, by the UE, an indication associated with an area and/or the PTM configuration.

In a second aspect of the present disclosure, a user equipment (UE) comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the above method.

In a third aspect of the present disclosure, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.

In a fourth aspect of the present disclosure, a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.

In a fifth aspect of the present disclosure, a computer readable storage medium, in which a computer program is stored, causes a computer to execute the above method.

In a sixth aspect of the present disclosure, a computer program product includes a computer program, and the computer program causes a computer to execute the above method.

In a seventh aspect of the present disclosure, a computer program causes a computer to execute the above method.

BRIEF DESCRIPTION OF DRAWINGS

In order to illustrate the embodiments of the present disclosure or related art more clearly, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present disclosure, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.

FIG. 1 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB) of communication in a communication network system according to an embodiment of the present disclosure.

FIG. 2 is a flowchart illustrating a method of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state performed by the UE according to an embodiment of the present disclosure.

FIG. 3 is a diagram illustrating an RAN-based notification area according to an embodiment of the present disclosure.

FIG. 4 is a flowchart illustrating an RNA solution according to an embodiment of the present disclosure.

FIG. 5 is a flowchart illustrating a neighbor cell solution according to an embodiment of the present disclosure.

FIG. 6 is a flowchart illustrating a neighbor cell solution according to an embodiment of the present disclosure.

FIG. 7 is a flowchart illustrating a combination of the above solutions according to an embodiment of the present disclosure.

FIG. 8 is a flowchart illustrating a combination of the above solutions according to an embodiment of the present disclosure.

FIG. 9 is a flowchart illustrating a combination of the above solutions according to an embodiment of the present disclosure.

FIG. 10 is a flowchart illustrating that all of the above solutions are introduced according to an embodiment of the present disclosure.

FIG. 11 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.

In RANP#94 meeting, the following R18 WID has been approved. This work item is to further enhance the NR Multicast/Broadcast functions based on Rel-17 MBS. The objectives for Rel-18 include: 1. Specify support of multicast reception by UEs in RRC_INACTIVE state [RAN2, RAN3] . Specify PTM configuration for UEs receiving multicast in RRC_INACTIVE state [RAN2] . Study the impact of mobility and state transition for UEs receiving multicast in RRC_INACTIVE [RAN2, RAN3] . 2. Specify Uu signaling enhancements to allow a UE to use shared processing for MBS broadcast and unicast reception, i.e., including UE capability and related assistance information reporting regarding simultaneous unicast reception in RRC_CONNECTED and MBS broadcast reception from the same or different operators [RAN2] . 3. Study and if necessary, specify enhancements to improve the resource efficiency for MBS reception in RAN sharing scenarios [RAN3] . Note: collaboration with SA2 is expected in due course for the above objectives.

From this, we can see that the PTM configurations acquired by a UE may apply to a certain area (i.e., a set of cells instead of a single cell) . That is, this (certain) area means that the PTM configuration of a certain multicast service in this area is the same. In this disclosure, we call it M area of the PTM configurations for UE in RRC_INACTIVE.

In this disclosure, we are going to discuss how to configure M area to UEs in RRC_INACTIVE.

FIG. 1 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB) 20 for communication in a communication network system 40 according to an embodiment of the present disclosure are provided. The communication network system 40 includes the one or more UEs 10 and the base station 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The

processor

11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of radio interface protocol may be implemented in the

processor

11 or 21. The

memory

12 or 22 is operatively coupled with the

processor

11 or 21 and stores a variety of information to operate the

processor

11 or 21. The

transceiver

13 or 23 is operatively coupled with the

processor

11 or 21, and the

transceiver

13 or 23 transmits and/or receives a radio signal.

The

processor

11 or 21 may include application-specific integrated circuit (ASIC) , other chipset, logic circuit and/or data processing device. The

memory

12 or 22 may include read-only memory (ROM) , random access memory (RAM) , flash memory, memory card, storage medium and/or other storage device. The

transceiver

13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules can be stored in the

memory

12 or 22 and executed by the

processor

11 or 21. The

memory

12 or 22 can be implemented within the

processor

11 or 21 or external to the

processor

11 or 21 in which case those can be communicatively coupled to the

processor

11 or 21 via various means as is known in the art. Further, in some embodiments, the processor 11 is configured to perform the following methods.

FIG. 2 is a flowchart illustrating a wireless communication method 200 of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state performed by the UE according to an embodiment of the present disclosure. In some embodiments, the method 200 of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state performed by the UE includes: a step 202, receiving, by the UE, an indication associated with an area and/or the PTM configuration.

In some embodiments, the area means that the PTM configuration acquired by the UE is applicable to the area; the area means that the PTM configuration of a certain multicast service in the area is the same; and/or the area refers to M area of the PTM configurations for UE in the RRC inactive state. In some embodiments, the indication is transmitted from the base station to the UE, and the indication indicates if a radio access network (RAN) -based notification area (RNA) is used as M area or not. In some embodiments, the RNA is used as the M area. In some embodiments, the indication indicates the RNA is not allowed to be used as the M area, and the PTM configuration is used in a current serving cell. In some embodiments, the M area is controlled/configured by a network. In some embodiments, the UE is informed by the network that which cell or cells belong to the M area. In some embodiments, the M area is controlled/configured by the RAN or a core network (CN) . In some embodiments, if the M area is controlled/configured by the RAN, the indication is transmitted from the RAN/a base station (BS) to the UE. In some embodiments, the indication is transmitted by a radio resource control (RRC) message, a system information block (SIB) , or an MBS control channel (MCCH) .

In some embodiments, the RRC message comprises an RRC release or an RRC resume. In some embodiments, if the M area is controlled by the CN, the indication is transmitted from the CN to the UE. In some embodiments, the indication is transmitted by a non-access stratum (NAS) signaling. In some embodiments, the indication is transmitted from the CN to the base station, and the indication is further transmitted from the base station to the UE by an AS signaling. In some embodiments, the AS signaling is transmitted by an RRC message, a SIB, or a MCCH. In some embodiments, the RRC message comprises an RRC release or an RRC resume.

In some embodiments, the indication is used to inform the UE that whether the M area is enabled or not and/or the PTM configuration is used in a current cell. In some embodiments, an explicit signaling is transmitted from the base station to the UE to inform the UE whether the M area is enabled or not. In some embodiments, no M area related configuration is transmitted from the base station to the UE to implicitly let the UE knows that the M area is disabled and/or the PTM configuration is only valid in the current cell. In some embodiments, the indication is used to inform the UE that if the PTM configuration is applicable to a neighbor cell/neighbor cells.

In some embodiments, the indication is transmitted by the network to the UE to inform the UE that if the PTM configuration is applicable to the neighbor cell/neighbor cells. In some embodiments, the indication comprises a neighbor cell ID/neighbor cell IDs. In some embodiments, the indication is transmitted by the RRC message, the SIB, or the MCCH. In some embodiments, the RRC message comprises an RRC release or an RRC resume. In some embodiments, the indication is transmitted by the base station to the UE to inform the UE that whether the M area is enabled or not and/or the PTM configuration is used in a current cell. In some embodiments, an explicit signaling is transmitted from the base station to the UE to inform the UE whether the M area is enabled or not. In some embodiments, no M area related configuration is transmitted from the base station to the UE to implicitly let the UE knows that the M area is disabled and/or the PTM configuration is only valid in the current cell.

In some embodiments, whether the RNA is used as the M area or not refers to an RNA solution, the M area indicated by a network refers to a configurable solution, and/or the UE being informed if the PTM configuration is applicable to the neighbor cell refers to a neighbor cell solution.

In some embodiments, whether the RNA solution, the configurable solution, and/or the neighbor cell solution is used or not by the UE is configured by the network. In some embodiments, whether the RNA solution, the configurable solution, and/or the neighbor cell solution is used or not by the UE is explicitly indicated by the network. In some embodiments, whether the RNA solution, the configurable solution, and/or the neighbor cell solution is used or not by the UE is recognized by the UE without explicit indication. In some embodiments, one of the RNA solution, the configurable solution, and the neighbor cell solution is valid if the UE receives the RNA solution and the configurable solution at different times. In some embodiments, the one of the RNA solution, the configurable solution, and the neighbor cell solution is valid according to priorities of the RNA solution, the configurable solution the neighbor cell solution or a latest solution overriding an old one solution.

RNA can be used as M Area (RNA solution)

In LTE systems, the MME is responsible for assigning Tracking Area (TA) to each registered UE. FIG. 3 is a diagram illustrating an RAN-based notification area according to an embodiment of the present disclosure. FIG. 3 illustrates that, in 5G, however, there’s a new concept called RAN-based Notification Area (RNA) . When the UE moves out of the RNA cell list, it needs to report its location change similar to the TAU concept in LTE, which is called RAN-based Notification Area Update (RNAU) (triggered via the serving ng-eNB or gNB) . In this context, the Mobility Managed in terms of Paging and RNAU procedures for 5G have some improvement over the MM for LTE to meet the 5G use cases.

The 5GC has introduced a new mechanism for TAU, also called RNAU, for a UE in RRC-INACTIVE state to track its location more precisely with low signaling overhead. Basically, the RRC-INACTIVE state is introduced to reduce the Paging delay and enable lightweight transitions between this new state and RRC-CONNECTED.

FIG. 4 is a flowchart illustrating an RNA solution according to an embodiment of the present disclosure. RNA could be as used as M area. FIG. 4 illustrates that, in some embodiments, a network (NW) such as a base station (BS) could send an indication to UE that if RNA is used as M area or not. The indication could be carried by RRC msg (e.g., RRCrelease, RRCresume, etc., ) , or SIB/MCCH. BS can send the indication that RNA is not allowed to be used as M area, the PTM configuration would be just used in the current serving cell.

The innovative aspects of this solution are that: RNA could be as used as M area. BS could send an indication to UE that if RNA is used as M area or not. The indication could be carried by RRC msg (e.g., RRCrelease, RRCresume, etc., ) , or SIB/MCCH.

M Area is indicated by NW (configurable solution)

M area is beneficial for power saving and mobility, especially for the congestion scenario. Therefore, NW might be willing to change the M area dynamically due to the congestion situation change dynamically. RAN is aware of the congestion situation of the cell, therefore RAN can be in control of the M area. Core network (CN) is aware of the registration situation, therefore CN can also play the role.

In the case that RAN can be in control of the M area and sends the indication to inform UE the M area. The indication can be transmitted by RRC signaling, e.g., RRC release, RRC resume…. or SIB/MCCH.

In the case that CN can be in control of the M area and sends the indication to inform UE the M area. CN can transmit indication as a NAS signaling, or CN sends the indication to BS and BS sends the indication to UE via a AS signaling, by RRC signaling, e.g., RRC release, RRC resume…. or SIB/MCCH.

For this solution BS can also send the indication to inform if the M area is enabled, or the PTM configuration would be just used in the current cell. BS sends explicit signaling to inform UE whether M area is enabled or not, or BS doesn’t transmit any M area related configuration to UE which implicitly let UE know that M area is disabled and the PTM configuration is only valid in the current cell.

The innovative aspects of this solution are that: RNA can be in control M area, or CN can be in control of M area. In the case that RAN can be in control of the M area and sends the indication to inform UE the M area. The indication can be transmitted by RRC signaling, e.g., RRC release, RRC resume…. or SIB/MCCH.

In the case that CN can be in control of the M area and sends the indication to inform UE the M area. CN can transmit indication as a NAS signaling, or CN sends the indication to BS and BS sends the indication to UE via a AS signaling, by RRC signaling, e.g. RRC release, RRC resume…. or SIB/MCCH.

BS can also send the indication to inform if the M area is enabled, or the PTM configuration would be just used in the current cell.

BS sends explicit signaling to inform UE whether M area is enabled or not, or BS doesn’t transmit any M area related configuration to UE which implicitly let UE know that M area is disabled and the PTM configuration is only valid in the current cell.

UE is informed if the PTM configuration is applicable to the neighbor cell (s) (neighbor cell solution)

FIG. 5 is a flowchart illustrating a neighbor cell solution according to an embodiment of the present disclosure. FIG. 5 illustrates that, in some embodiments, the UE can be informed by the NW that if the PTM configuration is applicable to the neighbor cells.

FIG. 6 is a flowchart illustrating a neighbor cell solution according to an embodiment of the present disclosure. FIG. 5 illustrates that, in some embodiments, neighbor cell ID (s) can also be included. And the indication can be transmitted by RRC signaling, e.g., RRC release, RRC resume…. or SIB/MCCH.

The innovative aspects of this solution are that: UE can be informed by NW that if the PTM configuration is applicable to the neighbor cells. The indication can be transmitted by RRC signaling, e.g., RRC release, RRC resume…. or SIB/MCCH. BS can also send the indication to inform if the M area is enabled, or the PTM configuration would be just used in the current cell. BS sends explicit signaling to inform UE whether M area is enabled or not or BS doesn’t transmit any M area related configuration to UE which implicitly let UE know that M area is disabled and the PTM configuration is only valid in the current cell.

Combination of the above solutions

NW can configure which solution is used among two or more of the above solutions. e.g., Case 1: 2 of the above solutions are introduced, e.g., “RNA solution” and “neighbor cell solution” are introduced. FIG. 7 is a flowchart illustrating a combination of the above solutions according to an embodiment of the present disclosure. FIG. 8 is a flowchart illustrating a combination of the above solutions according to an embodiment of the present disclosure. FIG. 9 is a flowchart illustrating a combination of the above solutions according to an embodiment of the present disclosure.

Case 2: All of the above solutions are introduced

Regarding how to recognize which solution is used by UE, two options can be considered. One is NW can explicitly indicate which solution is used. The other one is due to different ASN. 1 format, UE can recognize which solution is used without explicit indication. Regarding which configuration is valid in the case that UE receives more than configurations at different times, two options can be considered.

One is set the priorities of these solutions. e.g., if “RNA solution” and “neighbor cell solution” are introduced, the priorities could be 1st priority is “RNA solution” and 2nd priority is “neighbor cell solution” , or vice versa. If all of the above solutions are introduced, the priorities could be 1st priority is “RNA solution” , 2nd priority is “neighbor cell solution” and the 3rd priority is “configurable solution” , or any other possibilities.

The other option is that the latest configuration can override the old one.

The innovative aspects of this solution are that: NW can configure which solution is used among two or more of the above solutions. How to recognize which solution is used by UE, two options can be considered. One is NW can explicitly indicate which solution is used. The other one is due to different ASN. 1 format, UE can recognize which solution is used without explicit indication.

Regarding which configuration is valid in the case that UE receives more than configurations at different times, two options can be considered. One is set the priorities of these solutions. The other option is that the latest configuration can override the old one.

FIG. 11 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software. FIG. 11 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated. The application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors. The processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.

While the present disclosure has been described in connection with what is considered the most practical and preferred embodiments, it is understood that the present disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.

Claims

A method of determining an applicable area of a point-to-multipoint (PTM) configuration for a user equipment (UE) receiving multicast in an RRC inactive state performed by the UE, comprising:

receiving, by the UE, an indication associated with an area and/or the PTM configuration.
The method according to claim 1, wherein the area means that the PTM configuration acquired by the UE is applicable to the area; the area means that the PTM configuration of a certain multicast service in the area is the same; and/or the area refers to M area of the PTM configurations for UE in the RRC inactive state.
The method according to claim 2, wherein the indication is transmitted from the base station to the UE, and the indication indicates if a radio access network (RAN) -based notification area (RNA) is used as M area or not.
The method according to claim 2 or 3, wherein the RNA is used as the M area.
The method according to claim 2 or 3, wherein the indication indicates the RNA is not allowed to be used as the M area, and the PTM configuration is used in a current serving cell.
The method according to claim 2, wherein the M area is controlled/configured by a network.
The method according to claim 6, wherein the UE is informed by the network that which cell or cells belong to the M area.
The method according to claim 6 or 7, wherein the M area is controlled/configured by RAN or a core network (CN) .
The method according to claim 8, wherein if the M area is controlled by RAN, the indication is transmitted from the RAN and or a base station (BS) to the UE.
The method according to claim 3 or 9, wherein the indication is transmitted by a radio resource control (RRC) message, a system information block (SIB) , or an MBS control channel (MCCH) .
The method according to claim 10, wherein the RRC message comprises an RRC release or an RRC resume.
The method according to claim 8, wherein if the M area is controlled by the CN, the indication is transmitted from the CN to the UE.
The method according to claim 12, wherein the indication is transmitted by a non-access stratum (NAS) signaling.
The method according to claim 12, wherein the indication is transmitted from the CN to the base station, and the indication is further transmitted from the base station to the UE by an AS signaling.
The method according to claim 14, wherein the AS signaling is transmitted by an RRC message, a SIB, or a MCCH.
The method according to claim 15, wherein the RRC message comprises an RRC release or an RRC resume.
The method according to claim 8, wherein the indication is used to inform the UE that whether the M area is enabled or not and/or the PTM configuration is used in a current cell.
The method according to claim 17, wherein an explicit signaling is transmitted from the base station to the UE to inform the UE whether the M area is enabled or not.
The method according to claim 17, wherein no M area related configuration is transmitted from the base station to the UE to implicitly let the UE knows that the M area is disabled and/or the PTM configuration is only valid in the current cell.
The method according to any one of claims 1 to 19, wherein the indication is used to inform the UE that if the PTM configuration is applicable to a neighbor cell/neighbor cells.
The method according to claim 20, wherein the indication is transmitted by the network to the UE to inform the UE that if the PTM configuration is applicable to the neighbor cell/neighbor cells.
The method according to claim 20 or 21, wherein the indication comprises a neighbor cell ID/neighbor cell IDs.
The method according to any one of claims 20 to 22, wherein the indication is transmitted by the RRC message, the SIB, or the MCCH.
The method according to claim 23, wherein the RRC message comprises an RRC release or an RRC resume.
The method according to any one of claims 20 to 24, wherein the indication is transmitted by the base station to the UE to inform the UE that whether the M area is enabled or not and/or the PTM configuration is used in a current cell.
The method according to claim 25, wherein an explicit signaling is transmitted from the base station to the UE to inform the UE whether the M area is enabled or not.
The method according to claim 25, wherein no M area related configuration is transmitted from the base station to the UE to implicitly let the UE knows that the M area is disabled and/or the PTM configuration is only valid in the current cell.
The method according to any one of claims 1 to 27, wherein whether the RNA is used as the M area or not refers to an RNA solution, the M area indicated by a network refers to a configurable solution, and/or the UE being informed if the PTM configuration is applicable to the neighbor cell refers to a neighbor cell solution.
The method according to claim 28, wherein whether the RNA solution, the configurable solution, and/or the neighbor cell solution is used or not by the UE is configured by the network.
The method according to claim 29, wherein whether the RNA solution, the configurable solution, and/or the neighbor cell solution is used or not by the UE is explicitly indicated by the network.
The method according to claim 29, wherein whether the RNA solution, the configurable solution, and/or the neighbor cell solution is used or not by the UE is recognized by the UE without explicit indication.
The method according to any one of claims 1 to 31, wherein one of the RNA solution, the configurable solution, and the neighbor cell solution is valid if the UE receives the RNA solution and the configurable solution at different times.
The method according to claim 32, wherein the one of the RNA solution, the configurable solution, and the neighbor cell solution is valid according to priorities of the RNA solution, the configurable solution the neighbor cell solution or a latest solution overriding an old one solution.
A user equipment, comprising:

a memory;

a transceiver; and

a processor coupled to the memory and the transceiver;

wherein the processor is configured to execute the method of any one of claims 1 to 33.
A non-transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 33.
A chip, comprising:

a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the method of any one of claims 1 to 33.
A computer readable storage medium, in which a computer program is stored, wherein the computer program causes a computer to execute the method of any one of claims 1 to 33.
A computer program product, comprising a computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 33.
A computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 33.