CN114945015B - Information acquisition method, device and storage medium - Google Patents

Abstract

The present application provides an information acquisition method, device, and storage medium, which relate to the communication field, and the method includes: the session management function SMF network element receives the deployment information EDI of the first edge application server sent by the unified data storage library UDR network element; An ED I includes the data network name DNN, the single network slice selection auxiliary information S-NSSA I and the full name domain name FQDN of the edge application server EAS; in the case that the first time period is greater than or equal to the preset duration, the SMF network element receives the UDR network For the updated first EDI sent by the element, the first time period includes: a time period after the SMF network element receives the first EDI, and/or, a time period after the UDR network element sends the first EDI. This method is applicable to the process in which the SMF network element configures DNS message processing rules for the EASDF network element, and is used to solve the problem of EDI failure during the configuration process.

Description

Information acquisition method, device and storage medium

technical field

The present application relates to the communication field, and in particular to an information acquisition method, device and storage medium.

Background technique

Currently, the 3rd generation partnership project (3GPP) edge computing standard (3GPP SA2 R17) defines that the session management function (session management function, SMF) network element can be obtained from the unified data repository (unified data repository) , UDR) network element to acquire and store edge application server deployment information (EDI) to generate domain name system (domain name system, DNS) message processing rules. SMF network elements can use DNS message processing rules to allocate edge application servers (edge application server, EAS) in the edge environment.

However, the EDI stored in the SMF network element may have invalid EDI, and the invalid EDI will cause the SMF network element to fail to correctly allocate the EAS.

Contents of the invention

The present application provides an information acquisition method, device and storage medium, which can continuously update the EDI stored in the SMF network element, thereby improving the effectiveness of the EDI stored in the SMF network element.

In a first aspect, the present application provides an information acquisition method, which includes: a session management function SMF network element receives domain name system DNS query information sent by an edge application server discovery function EASDF network element; the DNS query information includes the first user equipment UE The address information and the full domain name FQDN of the edge application server EAS; the SMF network element determines the DNN, S-NSSAI and application identifier corresponding to the first UE according to the address information of the first UE and the FQDN of the EAS; the SMF network element determines the information according to the DNS query The DNN, S-NSSAI and application identification corresponding to the first UE in the network respectively, send subscription information to the UDR network element in the unified data repository; the subscription information includes the DNN, S-NSSAI and application identification corresponding to the first UE respectively; the SMF network element Receive the first EDI sent by the UDR network element. The first EDI is determined by the UDR network element according to the DNN, S-NSSAI and application identifier corresponding to the first UE in the subscription information; the first EDI includes DNN, S-NSSAI, The application identifier and the FQDN of the EAS; the SMF network element determines the first DNS message processing rule according to the first EDI; the SMF network element sends the first DNS message processing rule to the EASDF network element, so that the EASDF network element processes the first DNS message according to the rule Querying the Internet Protocol IP address of the EAS corresponding to the FQDN for the first UE; when the first time period is greater than or equal to a preset time length, the SMF network element receives the updated first EDI sent by the UDR network element , the first time period includes: a time period after the SMF network element receives the first EDI, and/or, a time period after the UDR network element sends the first EDI.

In a possible implementation manner, when the first time period is greater than or equal to a preset duration, the SMF network element receives the updated first EDI sent by the UDR network element, and the first time period includes : the time period after the SMF network element receives the first EDI, and/or, the time period after the UDR network element sends the first EDI, including: when the SMF network element receives the message sent by the UDR network element When the time period after the first EDI is greater than or equal to the preset duration, the SMF network element sends an update request message to the UDR network element; the SMF network element receives the update response message sent by the UDR network element; the update response message includes the updated first EDI .

In another possible implementation, the updated first EDI is obtained by the UDR network element and sent to the SMF network element when the time period after the UDR network element sends the first EDI to the SMF network element is greater than or equal to the preset duration. sent.

In another possible implementation, when the first time period is greater than or equal to the preset duration, the SMF network element receives the updated first EDI sent by the UDR network element, and the first time period includes: the SMF network element receives The time period after the first EDI, and/or, the time period after the UDR network element sends the first EDI, includes: when the SMF network element receives the first EDI sent by the UDR network element, the time period is greater than or equal to the preset duration , and the SMF network element does not receive the updated first EDI sent by the UDR network element, the SMF network element sends an update request message to the UDR network element; the SMF network element receives the update response message sent by the UDR network element; the update response message includes Updated first EDI.

In another possible implementation, when the first time period is greater than or equal to the preset duration, after the SMF network element receives the updated first EDI sent by the UDR network element, the method further includes: SMF network element cleaning A cache of the first EDI. In the information acquisition method provided by this application, the time period after the SMF network element receives the first EDI sent by the UDR network element, and/or, the time period after the UDR network element sends the first EDI to the SMF network element is greater than or equal to In the case of a preset duration, the SMF network element can receive the updated first EDI sent by the UDR network element. Compared with the edge computing project in 3GPP SA2 R17, the SMF network element using the information acquisition method provided by this application The first EDI can be updated in real time, and the failure probability of the first EDI is low overall, which improves the effectiveness of the EDI stored in the SMF network element, thereby providing a guarantee for the allocation of EAS by the SMF network element.

In a second aspect, the present application provides an information acquisition device, which can be applied to a SMF network element with a session management function. The device may include: a transceiver module and a processing module. The transceiver module is connected with the processing module. The transceiver module is configured to receive DNS query information sent by the EASDF network element, the DNS query information includes the address information of the first UE and the FQDN of the EAS; the processing module is configured to use the address information of the first UE in the DNS query information and the FQDN of the EAS FQDN, to determine the DNN, S-NSSAI and application identifier corresponding to the first UE respectively; the transceiver module is also used to send a subscription to the unified data repository UDR network element according to the DNN, S-NSSAI and application identifier respectively corresponding to the first UE The subscription information includes the DNN, S-NSSAI, and application identifier corresponding to the first UE; the first EDI sent by the UDR network element is received, and the first EDI is the DNN, S-NSSAI, and Determined by the S-NSSAI and the application identifier; the first EDI includes DNN, S-NSSAI, the application identifier and the FQDN of the EAS; the processing module is also used to determine the first DNS message processing rule according to the first EDI; the transceiver module is also It is used to send the first DNS message processing rule to the EASDF network element, so that the EASDF network element queries the Internet Protocol IP address of the EAS corresponding to the FQDN for the first UE according to the first DNS message processing rule; When a time period is greater than or equal to the preset duration, receive the updated first EDI sent by the UDR network element, the first time period includes: the time period after the transceiver module receives the first EDI, and/or, the UDR network The period of time after the element sends the first EDI.

In a possible implementation, the transceiver module is specifically configured to send update request information to the UDR network element when the time period after receiving the first EDI sent by the UDR network element is greater than or equal to the preset duration; The update response information; the update response information includes the updated first EDI.

In another possible implementation, the updated first EDI is obtained by the UDR network element and sent to the transceiver module when the time period after the UDR network element sends the first EDI to the transceiver module is greater than or equal to the preset duration. .

In yet another possible implementation, the transceiver module is specifically configured to receive the first EDI sent by the UDR network element when the time period after receiving the first EDI sent by the UDR network element is greater than or equal to the preset duration, and the updated first EDI sent by the UDR network element has not been received. During EDI, send update request information to the UDR network element; receive update response information sent by the UDR network element; the update response information includes the updated first EDI.

In another possible implementation, the processing module is further configured to clear the first EDI after the transceiver module receives the updated first EDI sent by the UDR network element when the first time period is greater than or equal to the preset time period. cache.

In a third aspect, the present application provides a method for obtaining information, the method comprising: the unified data repository UDR network element receives the subscription information sent by the session management function SMF network element, and the subscription information includes the DNN and S-NSSAI respectively corresponding to the first UE and the application identifier; the UDR network element determines the first EDI according to the DNN, S-NSSAI, and application identifier corresponding to the first UE in the subscription information; the first EDI includes the DNN, S-NSSAI, application identifier, and edge application server EAS Full name domain name FQDN; the UDR network element sends the first EDI to the SMF network element; in the case that the first time period is greater than or equal to the preset time period, the UDR network element obtains the updated first EDI, and the first time period includes: SMF network The time period after the element receives the first EDI, and/or, the time period after the UDR network element sends the first EDI. The UDR network element sends the updated first EDI to the SMF network element.

In a possible implementation, when the first time period is greater than or equal to the preset duration, the UDR network element obtains the updated first EDI, and the first time period includes: the time after the SMF network element receives the first EDI period, and/or, the time period after the UDR network element sends the first EDI, including: the UDR network element receives the update request information sent by the SMF network element; the update request information is that the SMF network element receives the first EDI sent by the UDR network element When the subsequent time period is greater than or equal to the preset time length, it is sent by the SMF network element; the UDR network element responds to the update request information and obtains the updated first EDI.

In another possible implementation, when the first time period is greater than or equal to the preset duration, the UDR network element obtains the updated first EDI, and the first time period includes: the period after the SMF network element receives the first EDI The time period, and/or, the time period after the UDR network element sends the first EDI, including: when the time period after the UDR network element sends the first EDI to the SMF network element is greater than or equal to the preset duration, the UDR network element sends the application The function AF network element sends query request information, and the query request information is used to request to query the latest first EDI; the UDR network element receives the updated first EDI sent by the AF network element.

In a fourth aspect, the present application provides an information acquisition device, which is applied to a UDR network element of a unified data repository, and the device includes a transceiver module and a processing module, and the transceiver module and the processing module are connected. The transceiver module is configured to receive the subscription information sent by the SMF network element, and the subscription information includes the DNN, S-NSSAI and application identifier respectively corresponding to the first UE. The processing module is configured to determine the first EDI according to the DNN, S-NSSAI and application identifier respectively corresponding to the first UE in the subscription information; the first EDI includes DNN, S-NSSAI, application identifier and the full domain name of the edge application server EAS FQDN. The transceiver module is further configured to send the first EDI to the SMF network element. The processing module is also used to obtain the updated first EDI when the first time period is greater than or equal to the preset duration, the first time period includes: the time period after the SMF network element receives the first EDI, and/or , a period of time after the transceiver module sends the first EDI. The transceiver module is further configured to send the updated first EDI to the SMF network element.

In a possible implementation, the transceiver module is specifically configured to receive the update request information sent by the SMF network element; the update request information is that the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to the preset When the duration is set, it is sent by the SMF network element. The processing module is specifically configured to acquire the updated first EDI in response to the update request information.

In another possible implementation, the transceiver module is specifically configured to send query request information to the AF network element when the time period after sending the first EDI to the SMF network element is greater than or equal to the preset duration, and the query request information is used for Request to query the latest first EDI; receive the updated first EDI sent by the AF network element.

In a fifth aspect, the present application provides a communication device, which includes: a processor and a memory; the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device implements the above first aspect or The method described in the third aspect.

In a sixth aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium comprising: computer software instructions; when the computer software instructions are run in the computer, the computer is made to implement the above-mentioned first aspect or the third aspect. Methods.

In the seventh aspect, the present application provides a computer program product that, when the computer program product is run on a computer, causes the computer to execute the steps of the related method described in the first aspect above, so as to realize the above-mentioned first aspect or the third aspect Methods.

In an eighth aspect, the present application provides a chip system, including: a processor and an interface circuit; the interface circuit is used to receive computer programs or instructions and transmit them to the processor; the processor is used to execute the computer programs or instructions, so that the The chip system executes the method described in the first aspect or the third aspect above.

In a ninth aspect, the present application provides a communication system, which includes an SMF network element for performing the method described in the first aspect above, and a UDR network element for performing the method described in the third aspect above.

For the beneficial effects of the above-mentioned second aspect to the ninth aspect, reference may be made to the description in the first aspect, and details are not repeated here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flow diagram of an information acquisition method provided by an embodiment of the present application;

FIG. 3 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application;

FIG. 4 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application;

FIG. 5 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application;

FIG. 6 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application;

FIG. 7 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application;

FIG. 8 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application;

FIG. 9 is a schematic diagram of the composition of the information acquisition device provided by the embodiment of the present application;

FIG. 10 is another schematic diagram of the composition of the information acquisition device provided by the embodiment of the present application;

FIG. 11 is a schematic diagram of a composition of a communication device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that, in the embodiments of the present application, words such as "exemplarily" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a concrete manner.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. A skilled person can understand that words such as "first" and "second" do not limit the quantity and execution order.

In addition, the terms "including" and "having" mentioned in the description of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include other unlisted steps or units, or may optionally also include Other steps or elements inherent to the process, method, product or apparatus are included.

Currently, in a 5G system supporting edge computing, a terminal device (user equipment, UE) can obtain edge application services through EAS. Before obtaining edge application services, the UE needs to discover the IP address of a suitable EAS. For example, the UE can send the DNS query of the EAS to the edge application server discovery function (EASDF) network element; the EASDF network element can send the DNS query of the EAS sent by the UE according to the DNS message processing rules configured by the SMF network element. To the DNS server; the EASDF network element can also feed back the DNS query result of the EAS to the UE.

Wherein, the DNS message processing rule can be obtained according to the EDI. For example, UDR network elements can interact with AF network elements to obtain and store EDI; SMF network elements can obtain and store EDI from UDR network elements, and determine DNS message processing rules based on EDI.

However, there may be invalid EDI in the EDI stored in the SMF network element. Invalid EDI will cause SMF network elements to fail to correctly allocate EAS.

Under this background technology, the embodiment of the present application provides an information acquisition method, and the SMF network element using this method can regularly receive the updated EDI sent by the UDR network element, thereby improving the effectiveness of the EDI stored in the SMF network element , thus guaranteeing the allocation of EAS to SMF network elements. This process will be introduced in the embodiments shown in FIG. 2 to FIG. 8 below, and will not be repeated here.

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1 , a communication system 100 may include an SMF network element 101 and a UDR network element 102 . Multiple EDIs may be stored in the UDR network element 102 . The SMF network element 101 may be configured to receive the first EDI sent by the UDR network element 102 . The first EDI is one of the multiple EDIs stored in the UDR network element 102 . A timer may be set in the SMF network element 101 and/or the UDR network element 102 to regularly update the first EDI.

Optionally, the SMF network element 101 can also be responsible for tunnel maintenance, IP address allocation and management, UP function selection, policy implementation, charging data collection, roaming, etc.

Optionally, the UDR network element 102 may also be used to provide services such as data storage and retrieval for other network elements in the 5G network.

Optionally, the communication system 100 may further include at least one of the following network elements: an AF network element, a NEF network element, or an EASDF network element (not shown in FIG. 1 ).

Among them, the AF network element can be used to interact with other network elements in the 5G network and provide business services. NEF network elements can be used to open and provide standard interfaces for 5G core network network elements. The EASDF network element can be used to send the DNS query of the EAS sent by the UE to the DNS server according to the guidance of the SMF network element, and feed back the DNS query result to the UE.

First, the information acquisition method provided by the SMF network element in the embodiment of the present application is introduced as the execution subject. FIG. 2 is a schematic flowchart of an information acquisition method provided by an embodiment of the present application. As shown in FIG. 2, the method may include S101 to S107.

S101. The SMF network element receives DNS query information sent by the EASDF network element.

Wherein, the DNS query information may include the address information of the first UE (such as: the IP address of the first UE or the media access control (media access control, MAC) address of the first UE, etc.) and the fully qualified domain name (fullyqualified domain name) of the EAS. FQDN).

S102, the SMF network element determines the data network name (data network name, DNN) and single network slice selection auxiliary information (single network slice selection) respectively corresponding to the first UE according to the address information of the first UE in the DNS query information and the FQDN of the EAS assistance information, S-NSSAI) and application ID (application ID).

For example, the address information of the first UE may have a corresponding relationship with the protocol data unit (protocol data unit, PDU) session, the configuration information of the PDU session may include DNN and S-NSSAI, and the SMF network element may query according to the address information of the first UE For the PDU session corresponding to the address information, obtain the DNN and S-NSSAI in the configuration information of the PDU session as the DNN and S-NSSAI corresponding to the first UE.

For another example, one EAS may correspond to multiple application identifiers of edge applications, and the SMF network element may query the application identifiers of the edge applications corresponding to the EAS according to the FQDN of the EAS.

S103. The SMF network element sends subscription information to the UDR network element according to the DNN, S-NSSAI, and application identifier respectively corresponding to the first UE.

Wherein, the subscription information may include the DNN, the S-NSSAI and the application identifier respectively corresponding to the first UE.

S104. The SMF network element receives the first EDI sent by the UDR network element.

Wherein, the UDR network element can store multiple EDIs. The first EDI is one of the multiple EDIs stored in the UDR network element. The first EDI is determined by the UDR network element according to the DNN, S-NSSAI and application identifier corresponding to the first UE in the subscription information. The first EDI may include DNN, S-NSSAI, application identifier and FQDN of EAS.

Optionally, the first EDI may also include domain name system (domain name system, DNS) server information (DNS server information), and EAS Internet Protocol (internet protocol, IP) address range information (EAS IP address range information), etc. any one or more of .

Optionally, after S104, the SMF network element may also store the first EDI.

In a possible implementation manner, as described above, the SMF network element may receive the first EDI sent by the UDR network element through the NEF network element.

S105. The SMF network element determines a first DNS message processing rule according to the first EDI.

Wherein, the first DNS message processing rule may include DNN, S-NSSAI, application identifier corresponding to the first UE, and a first correspondence, where the first correspondence refers to the correspondence between FQDN and DNS server information.

Optionally, the first DNS message processing rule may further include a first identifier, which is used to indicate relevant information of the first DNS message processing rule. For example, the first identifier may indicate at least one of the following:

1. DNS message processing rule priority, which is used for DNS message processing rule selection when multiple DNS message processing rules are applicable to the DNS query of a certain UE at the same time.

2. DNS message types, including DNS query (message) and DNS feedback (message).

3. DNS message processing behavior, including reporting behavior (EASDF network element reports DNS feedback to SMF network element), forwarding behavior (EASDF network element forwards DNS query sent by UE to DNS server specified by DNS message processing rules) or control behavior (EASDF network element cache or delete DNS feedback).

S106. The SMF network element sends the first DNS message processing rule to the EASDF network element, so that the EASDF network element queries the IP address of the EAS corresponding to the FQDN for the first UE according to the first DNS message processing rule.

Wherein, the first time period may include a time period after the SMF network element receives the first EDI, and/or, a time period after the UDR network element sends the first EDI. It should be noted that multiple EDIs may be stored in the UDR network element and/or the SMF network element, and the first EDI may be one of the multiple EDIs. The preset durations corresponding to different first EDIs may be the same or different, which is not limited in this embodiment of the present application.

For example, after the EASDF network element receives the first DNS message processing rule sent by the SMF network element, the EASDF can determine the FQDN in the DNS query (message) sent by the first UE according to the first correspondence in the first DNS message processing rule corresponding DNS server address information, and send the DNS query (message) of the first UE to the DNS server corresponding to the DNS server address information corresponding to the FQDN. The DNS server may store the mapping relationship between the FQDN and the IP address of the EAS. The first UE may determine a suitable IP address of the EAS according to the mapping relationship between the FQDN stored in the DNS server and the IP address of the EAS, and obtain the edge service application.

S107. In the case that the first time period is greater than or equal to the preset time length, the SMF network element receives the updated first EDI sent by the UDR network element.

In a possible implementation manner, the preset duration may be preset in the SMF network element. For example, after receiving the first EDI sent by the UDR network element, the SMF network element may set a timer for the first EDI. In this case, FIG. 3 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application. As shown in FIG. 3 , the above S107 may specifically include S201 and S202.

S201. When the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to a preset time length, the SMF network element sends update request information to the UDR network element.

Wherein, the preset duration can be preset by the manager. For example, the preset duration may be 1 day, 7 days, or 15 days. The embodiment of the present application does not limit the specific duration of the preset duration. The update request message may be used to request an update of the first EDI. Exemplarily, the update request information may include the DNN, S-NSSAI and application identifier in the first EDI.

S202. The SMF network element receives the update response information sent by the UDR network element.

Wherein, the update response information may include the updated first EDI. Taking the first EDI including DNN, S-NSSAI, application identifier, FQDN, DNS server information and EAS Internet Protocol address range information as an example, the updated first EDI may include at least one of the following: updated FQDN, updated DNS server information and updated EAS IP address range information. Optionally, the updated first EDI also includes: DNN, S-NSSAI and application identifier.

In another possible implementation manner, the preset duration may also be preset in the UDR network element. For example, the UDR network element may store the first EDI, and the UDR network element may set a timer for the first EDI. When the timer reaches the preset timing, the UDR network element can obtain the updated first EDI and send it to the SMF network element. In this case, the updated first EDI received by the SMF network element is obtained by the UDR network element when the time period after the UDR network element sends the first EDI to the SMF network element is greater than or equal to the preset duration. Sent by the SMF network element.

In yet another possible implementation manner, the preset duration may be preset in both the SMF network element and the UDR network element. For example, the UDR network element is configured to update the first EDI to the SMF network element according to a preset duration. The SMF network element judges whether to receive the updated first EDI sent by the UDR network element every preset period of time. In this case, FIG. 4 is another schematic flow chart of the information acquisition method provided by the embodiment of the present application. As shown in FIG. 4 , the above S107 may specifically include S301 to S302.

S301. When the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to the preset duration, and the SMF network element has not received the updated first EDI sent by the UDR network element, the SMF network element sends The UDR network element sends update request information.

For the update request information in S301, reference may be made to the description in S201 above, which will not be repeated here.

S302. The SMF network element receives the update response information sent by the UDR network element.

For S302, reference may be made to the description of S202 above, and details will not be repeated here.

Optionally, after S302, S201 or S107, the SMF network element may also clear the cache of the first EDI.

Optionally, after S107, the SMF network element may also determine an updated DNS message processing rule according to the updated first EDI and send it to the ESADF network element. For the updated DNS message processing rules, reference may be made to the foregoing DNS message processing rules, which will not be repeated here.

In the information acquisition method provided by the embodiment of the present application, the SMF network element can also receive the updated first EDI sent by the UDR network element after the time length of the first EDI sent by the UDR network element reaches the preset first time length. , compared with the edge computing project in 3GPP S A2 R17, the first EDI in the SMF network element using the information acquisition method provided by the embodiment of the present application may not receive the DNS query sent by the first UE for querying the edge service application (message) is automatically updated at regular intervals, and the probability of failure of the first EDI on the whole is low, thereby improving the effectiveness of the EDI stored in the SMF network element, thus providing a guarantee for the allocation of EAS by the SMF network element.

The above is an introduction by taking the SMF network element as an execution subject of the information acquisition method as an example. Optionally, the subject of execution of the method may also be a UDR network element. FIG. 5 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application. As shown in Fig. 5, the method may include S401 to S405.

S401. The UDR network element receives subscription information sent by the SMF network element.

For S401, reference may be made to the description in S103 above, and details will not be repeated here.

S402. The UDR network element determines the first EDI according to the DNN, S-NSSAI, and application identifier respectively corresponding to the first UE in the subscription information.

For example, the UDR network element can store multiple EDIs, and the UDR network element can use the DNN, S-NSSAI, and application identifier corresponding to the first UE in the subscription information as an index to search and determine the DNN, S-NSSAI and application identifier corresponding to the first UE respectively. NSSAI and the first EDI of the application identification.

S403. The UDR network element sends the first EDI to the SMF network element.

S404. In the case that the first time period is greater than or equal to the preset time period, the UDR network element acquires the updated first EDI.

Wherein, the first time period may refer to the above S107, which will not be repeated here.

In a possible implementation manner, the preset duration may be preset in the SMF network element. In this case, FIG. 6 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application. As shown in FIG. 6, the above S404 may specifically include S501 and S502.

S501. The UDR network element receives update request information sent by the SMF network element.

Wherein, the update request information is sent by the SMF network element when the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to the preset duration. The update request information may include DNN, S-NSSAI and application ID in the first EDI.

S502. The UDR network element acquires the updated first EDI in response to the update request information.

For example, the UDR network element may send query request information to the AF network element in response to the update request information, and the query request information may be used to request to query the latest first EDI. Exemplarily, the query request information includes DNN, S-NSSAI and application ID in the first EDI. The AF network element can collect the updated first EDI according to the DNN, S-NSSAI and application ID in the first EDI and send it to the UDR network element. That is, the above S502 may specifically include: the UDR network element responds to the update request information, interacts with the AF network element, and acquires the updated first EDI.

For another example, the UDR network element can receive and store the updated first EDI sent by the AF network element; the updated first EDI is collected by the AF network element and sent to the UDR network after the AF network element determines that the first EDI is invalid. yuan.

In another possible implementation manner, the preset duration may be preset in the UDR network element. In this case, FIG. 7 is another schematic flowchart of the information acquisition method provided by the embodiment of the present application. As shown in FIG. 7 , the above S404 may specifically include S601 and S602.

S601. When the time period after the UDR network element sends the first EDI to the SMF network element is greater than or equal to a preset time length, the UDR network element sends query request information to the AF network element.

S602. The UDR network element receives the updated first EDI sent by the AF network element.

S601 and S602 may refer to the description in S502 that the UDR network element and the AF network element interact to obtain the updated first EDI, and details are not repeated here.

S405. The UDR network element sends the updated first EDI to the SMF network element.

The above is an introduction by taking a single SMF network element or a UDR network element as an execution subject of the information acquisition method as an example. The information acquisition method provided by the embodiment of the present application will be introduced below in a manner of interacting with multiple network elements. FIG. 8 is another schematic flow chart of the information acquisition method provided by the embodiment of the present application. As shown in FIG. 8, the method may include S701 to S710.

S701. The EASDF network element sends DNS query information to the SMF network element. Correspondingly, the SMF network element receives the DNS query information from the EASDF network element.

Wherein, the DNS query information may include the address information of the first UE and the FQDN of the EAS. For example, the IP address of the first UE or the MAC address of the first UE. The first UE may be any one of multiple UEs served by the EASDF network element.

S702. The SMF network element determines the DNN, the S-NSSAI and the application identifier respectively corresponding to the first UE according to the address information of the first UE and the FQDN of the EAS.

S702 may refer to the description of the corresponding relationship between the first EDI and the first UE in S101 above, and will not be repeated here.

S703. The SMF network element sends subscription information to the UDR network element through the NEF network element according to the DNN, S-NSSAI, and application identifier respectively corresponding to the first UE. Correspondingly, the UDR network element receives the subscription information from the SMF network element through the NEF network element.

Wherein, the subscription information may include the DNN, the S-NSSAI and the application identifier respectively corresponding to the first UE.

Optionally, after determining the DNN, S-NSSAI and application identifier corresponding to the first UE according to the address information of the first UE, the SMF network element may also , judging whether the first EDI corresponding to the first UE is stored in the SMF network element. The above S702 may specifically include: when the first EDI corresponding to the first UE is not stored in the SMF network element, the first SMF sends the UDR network element to the UDR network element through the NEF network element according to the DNN, S-NSSAI, and application identifier respectively corresponding to the first UE. Send subscription information.

S704. The UDR network element determines the first EDI according to the DNN, S-NSSAI, and application identifier respectively corresponding to the first UE in the subscription information.

For S704, reference may be made to the description of S404 above, and details will not be repeated here.

S705. The UDR network element sends the first EDI to the SMF network element through the NEF network element. Correspondingly, the SMF network element receives the first EDI from the UDR network element through the NEF network element.

S706. The SMF network element determines a first DNS message processing rule according to the first EDI.

For S706, reference may be made to the description at S105 above, and details will not be repeated here.

S707. The SMF network element sends the first DNS message processing rule to the EASDF network element.

Correspondingly, the EASDF network element may receive the first DNS message processing rule sent by the SMF network element.

For S707, reference may be made to the description in S106 above, and details will not be repeated here.

S708. When the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to the preset time length, the SMF network element sends update request information to the UDR network element through the NEF network element.

For example, the SMF network element may set a timer for the first EDI when receiving the first EDI sent by the UDR network element through the NEF network element. When the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to the preset duration, the timer of the first EDI triggers the SMF network element to send update request information to the UDR network element.

S709, the UDR network element interacts with the AF network element to acquire the updated first EDI.

For S709, reference may be made to the description in S502 above, and details will not be repeated here.

S710. The UDR network element sends the updated first EDI to the SMF network element through the NEF network element.

Correspondingly, the SMF network element may receive the updated first EDI sent by the UDR network element through the NEF network element.

For example, the UDR network element may send update response information to the SMF network element through the NEF network element. The update response message may include the updated first EDI.

Optionally, after the SMF network element receives the update response information sent by the UDR network element through the NEF network element, it may also determine whether the update response information includes the updated first EDI. If included, the SMF network element may delete the cache of the first EDI.

Optionally, after S710, the SMF network element may reset the timer for the updated first EDI.

Optionally, after S710, the SMF network element may also determine an updated first DNS message processing rule according to the updated first EDI and send the updated first DNS message processing rule to the EASDF network element.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods. In order to realize the above functions, it includes corresponding hardware structures and/or software modules for performing various functions. It should be easy for those skilled in the art to realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Expert technical targets may use different methods to implement the described functions for each particular application, but such implementation should not be regarded as exceeding the scope of the present application.

In an exemplary embodiment, an embodiment of the present application provides an information acquisition device, which can be applied to the above-mentioned SMF network element. FIG. 9 is a schematic diagram of the composition of an information acquisition device provided by an embodiment of the present application. As shown in FIG. 9 , the device may include: a transceiver module 901 and a processing module 902 . The transceiver module 901 is connected to the processing module 902 . The transceiver module 901 is configured to receive DNS query information sent by the EASDF network element, where the DNS query information includes the address information of the first UE and the FQDN of the EAS;

The processing module 902 is configured to determine the DNN, S-NSSAI, and application identifier respectively corresponding to the first UE according to the address information of the first UE in the DNS query information and the FQDN of the EAS;

The transceiver module 901 is further configured to send subscription information to the UDR network element in the unified data repository according to the DNN, S-NSSAI and application identifiers respectively corresponding to the first UE, where the subscription information includes the DNN, S-NSSAI and Application identification: receive the first EDI sent by the UDR network element, the first EDI is determined by the UDR network element according to the DNN, S-NSSAI and application identification corresponding to the first UE in the subscription information; the first EDI includes DNN, S-NSSAI -NSSAI, Application ID and FQDN of EAS;

The processing module 902 is further configured to determine a first DNS message processing rule according to the first EDI;

The transceiver module 901 is further configured to send a first DNS message processing rule to the EASDF network element, so that the EASDF network element queries the Internet Protocol IP address of the EAS corresponding to the FQDN for the first UE according to the first DNS message processing rule;

The transceiver module 901 is also configured to receive the updated first EDI sent by the UDR network element when the first time period is greater than or equal to the preset duration, the first time period includes: after the transceiver module 901 receives the first EDI A time period, and/or, a time period after the UDR network element sends the first EDI.

In some possible embodiments, the transceiver module 901 is specifically configured to send update request information to the UDR network element when the time period after receiving the first EDI sent by the UDR network element is greater than or equal to the preset duration; The update response information; the update response information includes the updated first EDI.

In some other possible embodiments, the updated first EDI is obtained by the UDR network element and sent to the transceiver module 901 when the time period after the UDR network element sends the first EDI to the transceiver module 901 is greater than or equal to the preset duration of.

In some other possible embodiments, the transceiver module 901 is specifically configured to receive the first EDI sent by the UDR network element when the time period after receiving the first EDI sent by the UDR network element is greater than or equal to the preset duration, and the updated first EDI sent by the UDR network element has not been received. During EDI, send update request information to the UDR network element; receive update response information sent by the UDR network element; the update response information includes the updated first EDI.

In some other possible embodiments, the processing module 902 is further configured to clean up the first EDI caching.

In an exemplary embodiment, the embodiment of the present application provides another apparatus for obtaining information, and the apparatus may be applied to the above-mentioned UDR network element. FIG. 10 is another schematic diagram of the composition of the information acquisition device provided by the embodiment of the present application. As shown in FIG. 10 , the device may include a transceiver module 1001 and a processing module 1002 , and the transceiver module 1001 and the processing module 1002 are connected. The transceiver module 1001 is configured to receive subscription information sent by a session management function SMF network element, where the subscription information includes DNN, S-NSSAI and application identifier corresponding to the first UE respectively. The processing module 1002 is configured to determine the first EDI according to the DNN, S-NSSAI and application identifier respectively corresponding to the first UE in the subscription information; the first EDI includes DNN, S-NSSAI, application identifier and the full name of the edge application server EAS Domain name FQDN. The transceiver module 1001 is further configured to send the first EDI to the SMF network element. The processing module 1002 is further configured to obtain the updated first EDI when the first time period is greater than or equal to the preset time period, the first time period includes: the time period after the SMF network element receives the first EDI, and/or Or, the time period after the sending and receiving module 1001 sends the first EDI; send the updated first EDI to the SMF network element.

In some possible embodiments, the transceiver module 1001 is specifically configured to receive the update request information sent by the SMF network element; the update request information is that the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to the preset When the duration is set, it is sent by the SMF network element. The processing module 1002 is specifically configured to acquire the updated first EDI in response to the update request information.

In some other possible embodiments, the transceiver module 1001 is specifically configured to send query request information to the AF network element when the time period after sending the first EDI to the SMF network element is greater than or equal to the preset duration, and the query request information is used for Request to query the latest first EDI; receive the updated first EDI sent by the AF network element.

Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

It should be noted that the division of modules in FIG. 9 and FIG. 10 is schematic, and is only a logical function division, and there may be another division method in actual implementation. For example, two or more functions can also be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

In an exemplary embodiment, this embodiment of the present application provides a communication device, and the communication device may be applied to the above-mentioned SMF network element or UDR network element. FIG. 11 is a schematic diagram of a composition of a communication device provided by an embodiment of the present application. As shown in FIG. 11 , the communication device may include a processor 10 , a memory 20 , a communication line 30 and a communication interface 40 . The processor 10 , the memory 20 and the communication interface 40 may be connected through a communication line 30 .

Wherein, the processor 10 may be a central processing unit (central processing unit, CPU), a general-purpose processor, a network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller , programmable logic device (programmable logic device, PLD) or any combination thereof. The processor 201 may also be any other device having a processing function, such as a circuit, a device, or a software module, which is not limited in this embodiment of the present application. In an example, the processor 10 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 11 . As an optional implementation manner, the communication device includes multiple processors. For example, as shown in FIG. 11 , in addition to the processor 10, a processor 50 may also be included.

The memory 20 is used to store program instructions or data to be accessed by the application process, and the processor 10 can execute the program instructions in the memory 20 to implement the information acquisition method provided by the embodiment of the present application. For example, the instructions stored in memory 20 may be computer programs. The memory 20 can be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, and can also be an access memory (random access memory, RAM) or can store information and/or instructions. Or other types of dynamic storage devices for instructions, it can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other Optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disc storage media or other magnetic storage devices, etc. The embodiment of the present application does not limit the specific form of the memory 20 . The memory 20 may exist independently of the processor 10 or may be integrated with the processor 10 . The embodiments of the present application do not limit this either.

The communication line 30 is used to transmit information between various components included in the communication device.

The communication interface 40 is used for communicating with other devices or other communication networks. The other communication network may be an Ethernet, a radio access network (radio access network, RAN), a wireless local area network (wireless local area networks, WLAN), and the like. The communication interface 40 may be a module, a circuit, a transceiver or any device capable of realizing communication.

It should be noted that the composition shown in FIG. 11 does not constitute a limitation to the communication device provided in the embodiment of the present application. Except for the components shown in FIG. 11, the communication device may include more or less components than shown in the figure , or combinations of certain components, or different arrangements of components.

In a simple embodiment, the processor 10 in FIG. 11 can invoke the computer-executed instructions stored in the memory 20, so that the communication device executes the methods described in the foregoing method embodiments.

Exemplarily, the function/implementation process of the transceiver module 901 in FIG. 9 can be implemented by the processor 10 in FIG. 11 invoking computer-executed instructions stored in the memory 20 . Alternatively, the function/implementation process of the transceiver module 901 in FIG. 9 may be realized through the communication interface 40 in FIG. 11 .

Exemplarily, the function/implementation process of the transceiver module 1001 and the processing module 1002 in FIG. 10 can be realized by calling the computer-executed instructions stored in the memory 20 by the processor 10 in FIG. 11 . Or, the function/implementation process of the processing module 1002 in FIG. 10 can be realized by calling the computer execution instructions stored in the memory 20 by the processor 10 in FIG. 11 , and the function/implementation process of the transceiver module 1001 in FIG. 11 in the communication interface 40 to achieve.

In an exemplary embodiment, the embodiment of the present application further provides a computer program product. When the computer program product runs on the communication device, the communication device executes the steps of the above-mentioned related methods, so as to realize the above-mentioned steps in the method embodiments. method.

In an exemplary embodiment, the embodiment of the present application also provides a computer-readable storage medium, on which computer program instructions are stored; when the computer program instructions are executed by the communication device, the communication device realizes the above-mentioned embodiment. method described in . The computer-readable storage medium may be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device wait.

In an exemplary embodiment, the embodiment of the present application also provides a chip system, including: a processor and an interface circuit; the interface circuit is used to receive computer programs or instructions and transmit them to the processor; the processor is used to execute the computer programs or instructions, so that the system-on-a-chip implements the methods described in the foregoing embodiments.

In an exemplary embodiment, the embodiment of the present application further provides a communication system, the communication system includes an SMF network element for performing the method provided in the embodiment of the present application, and a network element for performing the method provided in the embodiment of the present application UDR network element.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application should be covered within the protection scope of the application . Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (12)

1. An information acquisition method, the method comprising:

the method comprises the steps that a session management function SMF network element receives domain name system DNS query information sent by an edge application server discovery function EASDF network element; the DNS query information includes address information of the first user equipment UE and a fully-called domain name FQDN of the edge application server EAS;

the SMF network element determines DNN, S-NSSAI and application identifier respectively corresponding to the first UE according to the address information of the first UE and the FQDN of the EAS in the DNS query information;

the SMF network element sends subscription information to a unified data storage library UDR network element according to DNN, S-NSSAI and application identifiers respectively corresponding to the first UE; the subscription information comprises DNN, S-NSSAI and application identifiers corresponding to the first UE respectively;

the SMF network element receives a first EDI sent by the UDR network element, wherein the first EDI is determined by the UDR network element according to DNN, S-NSSAI and application identifiers respectively corresponding to the first UE in the subscription information; the first EDI comprises DNN, S-NSSAI, application identifier and full name domain name FQDN of an Edge Application Server (EAS); the SMF network element determines a first DNS message processing rule according to the first EDI;

The SMF network element sends the first DNS message processing rule to the EASDF network element, so that the EASDF network element inquires the first UE of an Internet Protocol (IP) address of an EAS corresponding to the FQDN according to the first DNS message processing rule;

and when the first time period is greater than or equal to a preset time period, the SMF network element receives the updated first EDI sent by the UDR network element, where the first time period includes: the SMF network element receives the time period after the first EDI, and/or the UDR network element sends the time period after the first EDI.

2. The method according to claim 1, wherein the SMF network element receives the updated first EDI sent by the UDR network element if the first period of time is greater than or equal to a preset duration, the first period of time comprising: the time period after the SMF network element receives the first EDI, and/or the time period after the UDR network element sends the first EDI, including:

when the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to a preset duration, the SMF network element sends update request information to the UDR network element;

The SMF network element receives update response information sent by the UDR network element; the update response information includes the updated first EDI.

3. The method of claim 1, wherein the updated first EDI is obtained by the UDR network element and sent to the SMF network element when a time period after the sending of the first EDI to the SMF network element is greater than or equal to a preset duration.

4. The method according to claim 1, wherein the SMF network element receives the updated first EDI sent by the UDR network element if the first period of time is greater than or equal to a preset duration, the first period of time comprising: the time period after the SMF network element receives the first EDI, and/or the time period after the UDR network element sends the first EDI, including:

when the time period after the SMF network element receives the first EDI sent by the UDR network element is greater than or equal to a preset time period and the SMF network element does not receive the updated first EDI sent by the UDR network element, the SMF network element sends update request information to the UDR network element;

the SMF network element receives update response information sent by the UDR network element; the update response information includes the updated first EDI.

5. The method according to any one of claims 1-4, wherein, after the SMF network element receives the updated first EDI sent by the UDR network element, if the first period of time is greater than or equal to a preset duration, the method further comprises:

and the SMF network element cleans up the cache of the first EDI.

6. An information acquisition method, the method comprising:

the method comprises the steps that a Unified Data Repository (UDR) network element receives subscription information sent by a Session Management Function (SMF) network element, wherein the subscription information comprises DNN, S-NSSAI and application identifiers respectively corresponding to first UE;

the UDR network element determines a first EDI according to DNN, S-NSSAI and application identifiers respectively corresponding to the first UE in the subscription information; the first EDI comprises DNN, S-NSSAI, application identifier and full name domain name FQDN of an Edge Application Server (EAS);

the UDR network element sends the first EDI to the SMF network element;

when the first time period is greater than or equal to a preset time period, the UDR network element obtains the updated first EDI, where the first time period includes: the SMF network element receives the time period after the first EDI, and/or the UDR network element sends the time period after the first EDI;

And the UDR network element sends the updated first EDI to the SMF network element.

7. The method of claim 6, wherein the UDR network element obtains the updated first EDI if the first period of time is greater than or equal to a preset duration, the first period of time comprising: the SMF network element receives a time period after the first EDI, and/or the UDR network element sends the time period after the first EDI, including:

the UDR network element receives update request information sent by the SMF network element; the update request information is sent by the SMF network element when a time period after the SMF network element receives the first EDI sent by the UDR network element is more than or equal to a preset time period;

and the UDR network element responds to the update request information to acquire the updated first EDI.

8. The method of claim 6, wherein the UDR network element obtains the updated first EDI if the first period of time is greater than or equal to a preset duration, the first period of time comprising: the SMF network element receives a time period after the first EDI, and/or the UDR network element sends the time period after the first EDI, including:

When the time period after the UDR network element sends the first EDI to the SMF network element is greater than or equal to a preset time period, the UDR network element sends query request information to an application function AF network element; the query request information is used for requesting to query the latest first EDI;

and the UDR network element receives the updated first EDI sent by the AF network element.

9. An information acquisition apparatus, characterized in that the apparatus is applied to a session management function SMF network element, the apparatus comprising: a transceiver module and a processing module;

the receiving and transmitting module is used for receiving Domain Name System (DNS) query information sent by an EASDF network element; the DNS query information includes address information of the first user equipment UE and a fully-called domain name FQDN of the edge application server EAS;

the processing module is configured to determine DNN, S-nsai and an application identifier corresponding to the first UE respectively according to address information of the first UE and FQDN of EAS in the DNS query information;

the receiving and transmitting module is further configured to send subscription information to a unified data block UDR network element, where the subscription information includes DNN, S-nsai and an application identifier corresponding to the first UE respectively; receiving a first EDI sent by the UDR network element, wherein the first EDI is determined by the UDR network element according to DNN, S-NSSAI and application identifiers respectively corresponding to the first UE in the subscription information; the first EDI comprises DNN, S-NSSAI, application identifier and FQDN of EAS;

The processing module is further configured to determine a first DNS message processing rule according to the first EDI;

the transceiver module is further configured to send the first DNS message processing rule to the EASDF network element, so that the EASDF network element queries, for the first UE, an internet protocol IP address of an EAS corresponding to the FQDN according to the first DNS message processing rule; receiving updated first EDI sent by the UDR network element when the first period of time is greater than or equal to a preset period of time, where the first period of time includes: the transceiver module receives the time period after the first EDI, and/or the UDR network element sends the time period after the first EDI.

10. An information acquisition device, characterized in that it is applied to a unified data repository, UDR, network element, the device comprising: a transceiver module and a processing module;

the receiving and transmitting module is used for receiving subscription information sent by a session management function SMF network element, wherein the subscription information comprises DNN, S-NSSAI and application identifiers respectively corresponding to the first UE;

the processing module is used for determining a first EDI according to DNN, S-NSSAI and application identifiers respectively corresponding to the first UE in the subscription information; the first EDI comprises DNN, S-NSSAI, application identifier and full name domain name FQDN of an Edge Application Server (EAS);

The transceiver module is further configured to send the first EDI to the SMF network element;

the processing module is further configured to obtain, when the first period of time is greater than or equal to a preset duration, an updated first EDI, where the first period of time includes: the SMF network element receives the time period after the first EDI, and/or the receiving and transmitting module sends the time period after the first EDI; and sending the updated first EDI to the SMF network element.

11. A communication device, the communication device comprising: a processor and a memory;

the memory stores instructions executable by the processor;

the processor is configured to, when executing the instructions, cause the communication device to implement the method of any of claims 1-5 or 6-8.

12. A computer-readable storage medium, the computer-readable storage medium comprising: computer software instructions;

when the computer software instructions are run in a computer, the computer is caused to carry out the method according to any one of claims 1-5 or 6-8.

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