Indicating method and device for multicast session deactivation

Abstract

The invention provides a multicast session deactivation indication method executed by user equipment (UE), and the method comprises the following steps: if the UE is in a radio resource control (RRC) inactive state and is configured to receive a multicast session in the RRC inactive state, notifying the UE through group paging when the multicast session is deactivated.

Description

Technical Field

[0001] The present disclosure relates to wireless communication systems such as Multicast / Broadcast Service (MBS), and particularly to a method and apparatus for indicating multicast session deactivation. Background Art

[0002] In order to achieve efficient resource delivery for multicast / broadcast services, based on the Work Item Description (WID), the 3rd Generation Partnership Project (3GPP) developed New Radio (NR) broadcast / multicast in Release 17 (Rel-17) with the aim of implementing general MBS services based on the 5G system. The identified use cases that can benefit from this function include public safety and critical missions, Vehicle-to-Everything (V2X) applications, Internet Protocol Television (IPTV), live video, wireless software delivery, and Internet of Things (IoT) applications, etc. For Rel-17 multicast / broadcast service (MBS), the two identified delivery modes include: Delivery Mode 1 (for multicast only) can support services with higher Quality of Service (QoS), and Delivery Mode 2 (for broadcast only) focuses on services with lower QoS. Given that Rel-17 MBS already provides the basic functions to support MBS services, the overall main goal of Rel-18 is to be able to better deploy MBS, such as improving resource efficiency and capacity based on Rel-17 MBS.

[0003] In Rel-17, the Radio Access Network (RAN) only assigns multicast to User Equipment (UE) in the RRC connected state, which may not fully meet the requirements of, for example, critical mission services, especially for the case of cells with a large number of UEs recorded in Technical Report (TR) 23.774. In addition, keeping the UE in the RRC connected state for a long time is not energy-efficient. Therefore, it is crucial to support the multicast function of UEs in the RRC inactive state.

[0004] In the Long-Term Evolution (LTE) Single Cell Point-to-Multipoint (SC-PTM) technology, a SC-PTM Stop Indication MAC Control Element (MAC CE) is introduced to notify the UE to stop monitoring the Physical Downlink Control Channel (PDCCH) for a Group-Radio Network Temporary Identifier (G-TNTI). Thus, this MAC CE is multiplexed with the Single Cell-Multicast Traffic Channel (SC-MTCH) associated with the G-TNTI. Such a lightweight signaling mechanism allows the Temporary Mobile Group Identifier (TMGI) and G-RNTI to work under the one-to-one mapping constraint. On the other hand, the New Radio Multicast / Broadcast Services (NRMBS) allows a many-to-one mapping between the TMGI and G-RNTI. Therefore, if the MAC CE mechanism is continued to be used, it is necessary to clearly identify the TMGI to be activated. Since the MAC CE and MTCH are transmitted synchronously, it is expected that the delay between the UE receiving the last multicast data and terminating the MTCH monitoring can be minimized.

[0005] Therefore, there is a need to provide a method and apparatus for indicating the deactivation of a multicast session. Summary of the Invention

[0006] The object of the present disclosure is to propose a method and apparatus for indicating the deactivation of a multicast session, which can solve the problem of how to notify the UE in the RRC inactive state of the deactivation of the multicast session.

[0007] In a first aspect of the present disclosure, there is provided a method for indicating the deactivation of a multicast session executed by a User Equipment (UE). The method includes: if the UE is in the Radio Resource Control (RRC) inactive state and is configured to receive a multicast session in the RRC inactive state, when the multicast session is deactivated, notify the UE through group paging.

[0008] In a second aspect of the present disclosure, there is provided a user equipment. The user equipment includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to execute the method described above.

[0009] In a third aspect of the present disclosure, a non-transitory machine-readable storage medium is provided, on which instructions are stored, and when a computer executes the instructions, the computer is caused to execute the method described above.

[0010] In a fourth aspect of the present disclosure, a chip is provided, the chip includes a processor configured to call and run a computer program stored in a memory, so that a device installed with the chip executes the method described above.

[0011] In a fifth aspect of the present disclosure, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program, and the computer program causes a computer to execute the method described above.

[0012] In a sixth aspect of the present disclosure, a computer program product is provided, the computer program product includes a computer program, and the computer program causes a computer to execute the method described above.

[0013] In a seventh aspect of the present disclosure, a computer program is provided, and the computer program causes a computer to execute the method described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present disclosure or related technologies, the following drawings will be briefly introduced in the embodiments of the present disclosure or related technologies. Obviously, the drawings are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0015] Figure 1 is a communication architecture block diagram of one or more user equipments and a base station (such as a gNB) in a communication network system according to an embodiment of the present disclosure.

[0016] Figure 2 is a flowchart of a method for indicating multicast session deactivation executed by a user equipment according to an embodiment of the present disclosure.

[0017] Figure 3 is a flowchart of a method for indicating multicast session deactivation according to an embodiment of the present disclosure.

[0018] Figure 4 is an architecture block diagram of a wireless communication system according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions, structural features, implementation purposes, and effects of the embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be clear that the terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and do not limit the present disclosure.

[0020] In some embodiments of the present disclosure, the problem of how to notify a User Equipment (UE) in a Radio Resource Control (RRC) inactive state of the deactivation of a multicast session will be solved.

[0021] As Figure 1 shown, in some embodiments, one or more UEs 10 and a base station (such as a gNB) 20 for communication in a communication network system 40 of embodiments of the present disclosure are provided. The communication network system 40 includes one or more UEs 10 and a 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 the proposed functions, processes, and / or methods described in this specification. Each layer of the radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled to the processor 11 or 21 and stores various information for operating the processor 11 or 21. The transceiver 13 or 23 is operatively coupled to the processor 11 or 21 for transmitting and / or receiving wireless signals.

[0022] The processor 11 or 21 may include an Application Specific Integrated Circuit (ASIC), other chip sets, logic circuits, and / or data processing devices. The memory 12 or 22 may include a Read Only Memory (ROM), a Random Access Memory (RAM), a flash memory, a memory card, a storage medium, and / or other storage devices. The transceiver 13 or 23 may include a baseband circuit for processing radio frequency signals. When an embodiment is implemented in software, the technologies described herein may be implemented by modules (e.g., programs, functions, etc.) that execute the functions. The modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be integrated inside the processor 11 or 21, or located outside the processor 11 or 21, and in this case, may be communicatively coupled to the processor 11 or 21 through various ways known in the art. In addition, in some embodiments, the processor 11 is configured to execute the following method.

[0023] Figure 2 is a flowchart of a method 200 for indicating the deactivation of a multicast session executed by a UE according to an embodiment of the present disclosure. In some embodiments, the method 200 includes: Step 202, if the UE is in the RRC inactive state and is configured to receive a multicast session in the RRC inactive state, then when the multicast session is deactivated, notify the UE through a group paging.

[0024] In some embodiments, the group paging includes a paging message, an information element (IE) in the paging message, a short message indicator, or a short message for indicating deactivation of a multicast session. In some embodiments, the paging message and the IE in the paging message are used to indicate deactivation of the multicast session, and the UE is configured to receive multicast services in the RRC inactive state to monitor a paging radio network temporary identifier (P-RNTI) corresponding to the paging message. In some embodiments, when the UE detects the P-RNTI, it receives and decodes the paging message. In some embodiments, after the UE successfully receives and decodes the paging message, the UE determines whether the paging message is for deactivating the multicast session, and determines the UE and the multicast session corresponding to the paging message.

[0025] In some embodiments, the short message indicator or the short message is transmitted by downlink control information (DCI) format 1_0, and the cyclic redundancy check (CRC) of the DCI format 1_0 is scrambled by the P-RNTI. In some embodiments, when the short message indicator is used to indicate deactivation of the multicast session, the short message indicator includes 2 bits for indicating deactivation of the multicast session. In some embodiments, the bit field value 00 in the short message indicator is used to indicate deactivation of the multicast session, the bit field value 01 in the short message indicator is only used for unicast paging, the bit field value 10 in the short message indicator is only used for short messages, and the bit field value 11 in the short message indicator is used for unicast paging and short messages. In some embodiments, the short message includes 8 bits for indicating deactivation of the multicast session. In some embodiments, if the short message only carries scheduling information for paging, the bit field of the short message is retained. In some embodiments, an IE is added to the paging message to indicate the multicast session to be deactivated.

[0026] In some embodiments, when a short message is used to indicate deactivation of a multicast session, the bit field value 00 in the short message indicator remains reserved, and the UE behaviors corresponding to the bit field values 01, 10, and / or 11 in the short message indicator are changed. In some embodiments, the bits of the short message are used to determine whether paging is for deactivation of a multicast session, and the UE is configured to decode the Physical Downlink Shared Channel (PDSCH). In some embodiments, an IE is added to the paging message to indicate the multicast session to be deactivated. In some embodiments, the UE behavior corresponding to the bit field value 01 in the short message indicator is changed, and 2 bits in the short message are used to indicate deactivation of the multicast session; or the UE behavior corresponding to the bit field value 10 in the short message indicator is changed, and 1 bit in the short message is used to indicate deactivation of the multicast session; or the UE behavior corresponding to the bit field value 11 in the short message indicator is changed, and 2 bits in the short message are used to indicate deactivation of the multicast session.

[0027] Figure 3 is a flowchart of a method for indicating deactivation of a multicast session according to an embodiment of the present disclosure. Figure 3 shows that in some embodiments, if the UE is in the RRC inactive state and is configured to receive a multicast session in the RRC inactive state, the UE is notified by group paging when the multicast session is deactivated.

[0028] In some embodiments, the group paging sent by the network (NW) to the UE includes a paging message, an IE in the paging message, a short message indicator, or a short message for indicating deactivation of a multicast session. In some embodiments, the paging message and the IE in the paging message sent by the network to the UE are used to indicate deactivation of a multicast session, and the UE is configured to receive multicast services in the RRC inactive state to monitor the P-RNTI corresponding to the paging message. In some embodiments, when the UE detects the P-RNTI, it receives and decodes the paging message. In some embodiments, after the UE successfully receives and decodes the paging message, the UE determines whether the paging message is for deactivation of a multicast session and determines the UE and the multicast session corresponding to the paging message.

[0029] In some embodiments, the short message indicator or short message sent by the network to the UE is transmitted through DCI format 1_0, and the CRC of the DCI is scrambled by P-RNTI. In some embodiments, when the short message indicator is used to indicate the deactivation of a multicast session, the short message indicator includes 2 bits for indicating the deactivation of the multicast session. In some embodiments, the bit field value 00 in the short message indicator is used to indicate the deactivation of the multicast session, the bit field value 01 in the short message indicator is only used for unicast paging, the bit field value 10 in the short message indicator is only used for short messages, and the bit field value 11 in the short message indicator is used for unicast paging and short messages. In some embodiments, the short message includes 8 bits for indicating the deactivation of the multicast session. In some embodiments, if the short message only carries the scheduling information of paging, the bit field of the short message is reserved. In some embodiments, an IE is added to the paging message to indicate the multicast session to be deactivated.

[0030] In some embodiments, when the short message is used to indicate the deactivation of a multicast session, the bit field value 00 in the short message indicator remains reserved, and the UE behaviors corresponding to the bit field values 01, 10, and / or 11 in the short message indicator are changed. In some embodiments, the bits of the short message are used to determine whether the paging is for the deactivation of a multicast session, and the UE is configured to decode the PDSCH. In some embodiments, an IE is added to the paging message to indicate the multicast session to be deactivated. In some embodiments, the UE behavior corresponding to the bit field value 01 in the short message indicator is changed, and 2 bits in the short message are used to indicate the deactivation of the multicast session; or the UE behavior corresponding to the bit field value 10 in the short message indicator is changed, and 1 bit in the short message is used to indicate the deactivation of the multicast session; or the UE behavior corresponding to the bit field value 11 in the short message indicator is changed, and 2 bits in the short message are used to indicate the deactivation of the multicast session.

[0031] The overall solutions of some embodiments of the present disclosure include: when a multicast session is deactivated, using group paging to notify UEs in the inactive state. In Solution 1, a traditional group paging mechanism is used, and an IE is newly added to the paging message to indicate the deactivation of the multicast session; in Solution 2, a short message indicator is used to indicate the deactivation of the multicast session; in Solution 3, a short message is used to indicate the deactivation of the multicast session.

[0032] Embodiment

[0033] Embodiment 1: Use a traditional group paging mechanism and newly add an IE to the paging message to indicate the deactivation of the multicast session.

[0034] A UE in the inactive state and receiving multicast services will monitor the P-RNTI to detect whether there is a paging message. When the P-RNTI is detected, the UE will receive and decode the paging message.

[0035] When the UE successfully receives and decodes the paging message, the UE can identify whether the paging message is for multicast session deactivation, and for which UEs and multicast sessions (through the newly added IEs).

[0036] At the stage when the P-RNTI is detected but the paging message has not been successfully decoded, the UE cannot know the purpose of the paging message and which UEs the paging message is for. After the UE successfully receives and decodes the paging message, the UE will clarify the purpose of the paging message and which UEs the base station hopes to page.

[0037] The working mechanism of the paging message and the principle of how this new solution solves problems can be analyzed from ASN.1 (Abstract Syntax Notation One).

[0038] Paging message

[0039]

[0040]

[0041] For the existing paging message, the following analysis can be carried out from the above ASN.1:

[0042] If the UE receives a paging UE identity (PagingUE-Identity, including NG-5G-S-TMSI or I-RNTI-Value, etc.), then the UE will identify that the paging is a traditional unicast paging for itself and will initiate a Random Access Channel (RACH) to enter the connected state, so as to receive unicast services.

[0043] If the UE receives its subscribed Temporary Mobile Group Identity (TMGI), then the UE will identify that the paging is for multicast session activation and will initiate a RACH to enter the connected state, so as to receive multicast services (this is a Rel-17 process and can only receive multicast in the connected state).

[0044] The paging cause is used to indicate whether the paging message originates from IMS voice. If this field exists, it indicates that the corresponding paging entry is for IMS voice. If the upper layer protocol supports the paging cause indication function, but this field does not exist and there is a paging record list v1700 (pagingRecordList-v1700), it indicates that the corresponding paging entry is for non-IMS voice services. In other cases, the paging cause is considered undetermined.

[0045] Therefore, for Rel-18 multicast session deactivation, it can be illustrated by the following IEs as an example:

[0046] Paging message

[0047]

[0048] It is possible to add new IEs or paging cause values so that the UE can clearly understand the purpose of this paging. The above is just an example, and other types of new IEs can be as follows.

[0049] Paging message

[0050]

[0051] Embodiment 2: Using a short message indicator to indicate multicast session deactivation

[0052] P-RNTI scrambled DCI format 1_0

[0053] Transmitted by P-RNTI scrambled DCI format 1_0, which can be used to indicate the scheduling information of paging messages, or to send short messages, or both.

[0054] Excerpted from Table 7.3.1.2.1-1 of TS38.212

[0055] The following information is transmitted by P-RNTI scrambled CRC DCI format 1_0:

[0056] Short message indicator - with a bit width of 2 bits, defined according to Table 7.3.1.2.1-1.

[0057] Short message - with a bit width of 8 bits, defined according to Article 6.5 of [9, TS38.331]. If only carrying the scheduling information of paging, this bit field is reserved.

[0058] Frequency domain resource allocation - with a bit width of bits. If only carrying short messages, this bit field is reserved.

[0059] To control the size of the control resource set.

[0060] Time domain resource allocation - with a bit width of 4 bits, defined according to Article 5.1.2.1 of [6, TS38.214]. If only carrying short messages, this bit field is reserved.

[0061] Virtual resource block to physical resource block mapping (VRB-to-PRB) - with a bit width of 1 bit, defined according to Table 7.3.1.2.2-5. If only carrying short messages, this bit field is reserved.

[0062] Modulation and coding scheme (MCS) - 5-bit wide, defined according to Article 5.1.3 and Table 5.1.3.1-1 of [6, TS38.214]. If only carrying a short message, this bit field is reserved.

[0063] Transport block scaling factor (TB scaling) - 2-bit wide, defined according to Article 5.1.3.2 of [6, TS38.214]. If only carrying a short message, this bit field is reserved.

[0064] Reserved bits - 8 bits are reserved when operating in a cell with shared spectrum channel access, otherwise 6 bits are reserved.

[0065] The existing short message indicator field in the Downlink Control Information (DCI) format (see Table 7.3.1.2.1-1 of TS38.212) is as follows.

[0066] Table 7.3.1.2.1-1: Short message indicator

[0067]

[0068]

[0069] Table 6.5-1: Short message

[0070]

[0071] According to the above specification requirements, the following table can be generated:

[0072] Bit field Short message indicator UE behavior 00 Reserved 01 Unicast paging only Do not read short message + decode PDSCH 10 Short message only Read short message + do not decode PDSCH 11 Unicast paging + short message Read short message + decode PDSCH

[0073] Thus, the present disclosure proposes the following Solution 2: Use the short message indicator to indicate the deactivation of the multicast session.

[0074] The bit field value "00" in the short message indicator is used to indicate the deactivation of the multicast session, and "01", "10", "11" retain their original definitions.

[0075] Add a new IE in the paging message to indicate the multicast session to be deactivated.

[0076] Step 1: "00" indicates that the paging message in the scheduled PDSCH only includes the multicast session deactivation notification. The behavior of the UE receiving this "00" short message indicator is as follows:

[0077] UE receiving the multicast session: Decode the PDSCH using the P-RNTI. Other UEs: Do not decode the PDSCH for paging.

[0078] Bit field Short message indicator UE behavior 00 UE receiving multicast session Do not read short message + decode PDSCH

[0079] Step 2: Add a new IE to indicate the multicast session to be deactivated.

[0080] Paging message

[0081]

[0082] Embodiment 3: Use a short message to indicate the deactivation of a multicast session.

[0083] "00" in the short message indicator remains reserved. For "01", "10", and "11", the UE behavior is changed, and it is not yet decided whether the UE should decode the PESCH at this time.

[0084] Add a new IE in the paging message to indicate the multicast session to be deactivated.

[0085] Example 1: Change the UE behavior corresponding to the bit field value "01" in the short message indicator and use a 2-bit short message.

[0086] Bit field Short message indicator UE behavior 01 Unicast paging + multicast session deactivation Read short message

[0087]

[0088] Example 2: Change the UE behavior corresponding to the bit field value "10" in the short message indicator and use a 1-bit short message.

[0089] Bit field Short message indicator UE behavior 10 Short message + multicast session deactivation Read short message

[0090]

[0091] Example 3: Change the UE behavior corresponding to the bit field value "11" in the short message indicator and use a 2-bit short message.

[0092] Bit field Short message indicator UE behavior 11 Unicast paging + multicast session deactivation + short message Read short message

[0093]

[0094] On the other hand, related to some embodiments of the present disclosure, it involves how to ensure that the indication is only applicable to UEs that support the Rel-18 protocol. The solutions are disclosed below.

[0095] Solution 1: Define and clarify the behavior of the network / base station (NW / BS). The NW / BS and the UE can reach the following consensus: The NW / BS will send R-18 exclusive signaling to UEs that support the Rel-18 protocol during processes such as the registration process.

[0096] Solution 2: Notify the UE that the signaling is Rel-18 signaling through broadcast messages (e.g., System Information Block SIB) or dedicated signaling.

[0097] Figure 4 FIG. 4 is a block diagram of an architecture of a wireless communication system 700 provided for embodiments of the present disclosure. The embodiments described herein can be implemented in the system through any appropriately configured hardware and / or software. As Figure 4 shown, the system 700 includes at least a Radio Frequency (RF) circuit 710, a baseband circuit 720, an application circuit 730, a memory / storage device 740, a display 750, a camera 760, sensors 770, and an Input / Output (I / O) interface 780, and are interconnected at least as shown. The application circuit 730 may include, but is not limited to, one or more single-core or multi-core processors. These processors may comprise any combination of general-purpose processors and dedicated processors (such as graphics processors, application processors). The processors may be coupled to the memory / storage device and configured to execute instructions stored therein to support various applications and / or operating systems running on the system.

[0098] Although the present disclosure is described in conjunction with currently considered the most practical and preferred embodiments, it should be understood that the present disclosure should not be limited to the disclosed embodiments, but is intended to cover various solutions without departing from the broadest scope of the appended claims.

Claims

1. A method for indicating multicast session deactivation, the method being performed by a user equipment UE, characterized in that, The method includes: If the UE is in the Radio Resource Control (RRC) inactive state and is configured to receive a multicast session in the RRC inactive state, when the multicast session is deactivated, the UE is notified through group paging.

2. The method according to claim 1, wherein The group paging includes a paging message, an information element (IE) in the paging message, a short message indicator, or a short message for indicating the deactivation of the multicast session.

3. The method according to claim 2, wherein The paging message and the IE in the paging message are used to indicate the deactivation of the multicast session, and the UE is configured to receive multicast services in the RRC inactive state to monitor the paging radio network temporary identity (P-RNTI) corresponding to the paging message.

4. The method according to claim 3, characterized in that, When the UE monitors the P-RNTI, the UE receives and decodes the paging message.

5. The method according to claim 4, wherein After the UE successfully receives and decodes the paging message, the UE determines whether the paging message is for the deactivation of the multicast session, and determines the UE and the multicast session corresponding to the paging message.

6. The method according to claim 2, wherein The short message indicator or the short message is transmitted through downlink control information (DCI) format 1_0, and the cyclic redundancy check (CRC) of the DCI format 1_0 is scrambled by the P-RNTI.

7. The method according to any one of claims 2-6, characterized in that, When the short message indicator is used to indicate the deactivation of the multicast session, the short message indicator includes 2 bits for indicating the deactivation of the multicast session.

8. The method according to claim 7, wherein The bit field value 00 in the short message indicator is used to indicate the deactivation of the multicast session, the bit field value 01 in the short message indicator is only used for unicast paging, the bit field value 10 in the short message indicator is only used for short messages, and the bit field value 11 in the short message indicator is used for unicast paging and short messages.

9. The method according to claim 8, wherein The short message includes 8 bits for indicating the deactivation of the multicast session.

10. The method according to claim 9, wherein If the short message only carries scheduling information for paging, the bit field of the short message is reserved.

11. The method according to any one of claims 7-10, characterized in that, The IE is added to the paging message to indicate the multicast session to be deactivated.

12. The method according to any one of claims 2-6, characterized in that, When the short message is used to indicate the deactivation of the multicast session, the bit field value 00 in the short message indicator remains reserved, and the UE behaviors corresponding to the bit field values 01, 10, and / or 11 in the short message indicator are changed.

13. The method according to claim 12, characterized in that, The bits of the short message are used to determine whether the paging is for the deactivation of the multicast session and whether the UE is configured to decode the physical downlink shared channel (PDSCH).

14. The method according to claim 12 or 13, characterized in that, The IE is added to the paging message to indicate the multicast session to be deactivated.

15. The method according to any one of claims 12 - 14, characterized in that The UE behavior corresponding to the bit field value 01 in the short message indicator is changed, and 2 bits in the short message are used to indicate the deactivation of the multicast session.

16. The method according to any one of claims 12-14, characterized in that, The UE behavior corresponding to the bit field value 10 in the short message indicator is changed, and 1 bit in the short message is used to indicate the deactivation of the multicast session.

17. The method according to any one of claims 12 - 14, characterized in that, The UE behavior corresponding to the bit field value 11 in the short message indicator is changed, and 2 bits in the short message are used to indicate the deactivation of the multicast session.

18. A user equipment, characterized in that, The user equipment includes: a memory; a transceiver; and a processor coupled to the memory and the transceiver; The processor is configured to execute the method according to any one of claims 1-17.

19. A non-transitory machine-readable storage medium, characterized in that, Instructions are stored on the non-transitory machine-readable storage medium, and when the computer executes the instructions, the computer is caused to execute the method according to any one of claims 1-17.

20. A chip, characterized in that, The chip includes: A processor configured to call and run a computer program stored in a memory to cause a device installed with the chip to execute the method according to any one of claims 1-17.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that causes a computer to execute the method according to any one of claims 1-17.

22. A computer program product, characterized in that, The computer program product includes a computer program that causes a computer to execute the method according to any one of claims 1-17.

23. A computer program, characterized in that, The computer program causes a computer to execute the method according to any one of claims 1-17.

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