ABSTRACT
Abstract
This application provides a communication method and a communication apparatus. The method includes: A first network device receives a first message. The first message includes an identifier of a terminal device. The first network device determines first network selection information. The first network selection information includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN. The first network device sends a second message. The second message includes the first network selection information.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of International Application No. PCT/CN2021/079992, filed on Mar. 10, 2021, which claims priority to Chinese Patent Application No. 202010385697.4, filed on May 9, 2020. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties.
TECHNICAL FIELD
This application relates to the communications field, and more specifically, to a communication method and a communication apparatus.
BACKGROUND
A non-public network (NPN) is a non-public 5G network. A standalone non-public network (SNPN) is independently deployed, and may be implemented without depending on a network function of a public land mobile network (PLMN). The SNPN network may support a terminal in accessing the SNPN in an âexternal subscriptionâ manner. To be specific, user subscription of the terminal is owned by an external entity (for example, a mobile network operator (MNO)) independent of the SNPN network, and the SNPN network allows the terminal of this type to access the SNPN by using the external subscription.
So far, if a terminal device (UE) needs to access the SNPN in the external subscription manner, the terminal device needs to be located in coverage of the SNPN, and cannot be covered by the PLMN. However, during actual application, the terminal device may be located in common coverage of the SNPN and the PLMN, or the terminal device may be located only in coverage of the PLMN. In the two cases, there is no good method for the terminal device to access the SNPN.
SUMMARY
This application provides a communication method, to enable a terminal device to obtain SNPN network selection information of the terminal device from a PLMN or an SNPN, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the SNPN network selection information, and access the SNPN.
According to a first aspect, a communication method is provided. The method includes: A first network device receives a first message. The first message includes an identifier of a terminal device. The first network device determines first network selection information. The first network selection information includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN. The first network device sends a second message. The second message includes the first network selection information.
The SNPN network selection information is provided for the terminal device, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the SNPN network selection information, and access the SNPN.
With reference to the first aspect, in some implementations of the first aspect, that the first network device determines first network selection information includes: The first network device determines the first network selection information based on at least one of subscription data, policy data, and a local configuration of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, that the first network device determines the first network selection information based on at least one of subscription data, policy data, and a local configuration of the terminal device further includes: If the subscription data and the policy data of the terminal device coexist, the first network device preferentially determines the first network selection information based on the policy data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network device is an access and mobility management function network element AMF, and before the first network device determines first network selection information, the method further includes: The first network device sends a third message to a unified data management network element UDM. The third message is used to obtain the subscription data of the terminal device, and the subscription data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN. The first network device receives a fourth message sent by the UDM. The fourth message includes the subscription data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network selection information is the subscription data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network device is an AMF, and before the first network device determines first network selection information, the method further includes: The first network device sends a fifth message to a policy control function network element PCF. The fifth message is used to obtain the policy data of the terminal device, and the policy data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN. The first network device receives a sixth message sent by the PCF. The sixth message includes the policy data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network selection information is the policy data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the information about the SNPN that allows the terminal device to access includes an identifier of the SNPN that allows the terminal device to access.
The information including the identifier of the SNPN that allows the terminal device to access is sent to the terminal device, so that the terminal device may select, based on the network selection information, the SNPN to access.
With reference to the first aspect, in some implementations of the first aspect, the information about the SNPN that allows the terminal device to access further includes first priority information, indicating a priority sequence of the SNPN that allows the terminal device to access.
The priority information of the SNPN is specified, so that when being in coverage of different SNPNs or coverage of both the SNPN and the PLMN, the terminal device can select a most appropriate SNPN to access.
With reference to the first aspect, in some implementations of the first aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that does not allow the terminal device to access and/or indication information indicating that the terminal device is not allowed to access a PLMN.
The identifier of the PLMN that does not allow the terminal device to access and/or the indication information indicating that the terminal device is not allowed to access a PLMN are/is sent to the terminal device, so that when the terminal device is covered by both the PLMN and the SNPN, the terminal device can select the SNPN to access, or when the terminal device is covered by only the PLMN, the terminal device does not select the PLMN.
With reference to the first aspect, in some implementations of the first aspect, the local configuration includes information indicating that the terminal device is not allowed to access a PLMN and/or information indicating that the terminal is capable of accessing only the SNPN.
In a local configuration manner, when the terminal device attempts to access the PLMN, the network device may reject the terminal device from accessing the PLMN, and indicate, by determining the first network selection information, the terminal device to access the SNPN.
With reference to the first aspect, in some implementations of the first aspect, before the first network device sends a second message, the method further includes: The first network element marks the terminal device as being in a roaming state. A serving network of the terminal device is a PLMN, and a home network of the terminal device is an SNPN.
The terminal device that is actually in a non-roaming state is marked as being in the roaming state, so that the terminal device can access the SNPN by using the PLMN.
With reference to the first aspect, in some implementations of the first aspect, that the first network element marks the terminal device as being in a roaming state includes: The first network element marks, based on the local configuration or the subscription data of the terminal device, the terminal device as being in the roaming state. The local configuration includes an identifier that is of a terminal device in a specific range and that is allocated to the SNPN for use, or first indication information that indicates the first network element to mark, when an identifier of the terminal device includes an identifier of a specific SNPN, the terminal device as being in the roaming state. The subscription data of the terminal device includes second indication information, and the second indication information indicates that if the terminal device performs access from a PLMN, the terminal device enters the roaming state, or the second indication information indicates that the home network of the terminal device is an SNPN.
With reference to the first aspect, in some implementations of the first aspect, the method further includes: The first network device receives a seventh message sent by the terminal device. The seventh message is used to request to establish a first protocol data unit PDU session of a data network name DNN/single network slice selection assistance information S-NSSAI. The first network element establishes the first PDU session in a non-roaming manner when the subscription of the terminal device indicates that the first PDU session is home routed HR roaming, or establishes the first PDU session in an HR roaming manner when the subscription of the terminal device indicates that the first PDU session is local breakout LBO roaming.
The manner of indicating to establish the PDU session is used, so that the terminal device can implement logical conversion in an actual non-roaming case, access the SNPN by using the PLMN, and visit a service of the PLMN or the SNPN.
With reference to the first aspect, in some implementations of the first aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that allows the terminal device to access and second priority information. The second priority information indicates a priority sequence of the PLMN that allows the terminal device to access, and a priority indicated by the second priority information is lower than a priority indicated by the first priority information.
The network selection information including the identifier of the PLMN that allows the terminal device to access and the second priority information is sent, so that the terminal device can select the PLMN when the terminal device is not covered by the SNPN, access the SNPN by using the PLMN, and preferentially access the SNPN based on the priority information when the terminal device is located in coverage of both the PLMN and the SNPN.
With reference to the first aspect, in some implementations of the first aspect, the first network device belongs to an SNPN, the first network device sends the second message to a third network device, and the third network device belongs to a PLMN.
Optionally, the first network device may belong to the SNPN, or may belong to the PLMN.
According to a second aspect, a communication method is provided. The method includes: A second network device receives a first message. The first message includes an identifier of a terminal device. The second network device sends a second message. The second message includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN.
The related SNPN network selection information is provided, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the related SNPN network selection information, and access the SNPN.
With reference to the second aspect, in some implementations of the second aspect, the second network device is a unified data management network element UDM, the second message is subscription data of the terminal device, and the subscription data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN.
With reference to the second aspect, in some implementations of the second aspect, the second network device is a policy control function network element PCF, the second message is policy data of the terminal device, and the policy data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN.
With reference to the second aspect, in some implementations of the second aspect, the information about the SNPN that allows the terminal device to access includes at least one of the following information: indication information indicating that access from only the SNPN is allowed; an identifier of the SNPN that allows access; or first priority information, indicating a priority of the SNPN that allows access.
The information including the SNPN that allows access is provided for the terminal device, so that the terminal device can select the SNPN to access.
With reference to the second aspect, in some implementations of the second aspect, the information about whether the terminal device is allowed to access a PLMN includes at least one of the following information: indication information indicating that access from a PLMN is not allowed; or an identifier of a PLMN that does not allow access.
Information about the PLMN that does not allow access is provided for the terminal device, so that the terminal device does not access the PLMN when the terminal device is covered by both the PLMN and the SNPN or when the terminal device is located in coverage of only the PLMN.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of International Application No. PCT/CN2021/079992, filed on Mar. 10, 2021, which claims priority to Chinese Patent Application No. 202010385697.4, filed on May 9, 2020. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties.
TECHNICAL FIELD
This application relates to the communications field, and more specifically, to a communication method and a communication apparatus.
BACKGROUND
A non-public network (NPN) is a non-public 5G network. A standalone non-public network (SNPN) is independently deployed, and may be implemented without depending on a network function of a public land mobile network (PLMN). The SNPN network may support a terminal in accessing the SNPN in an âexternal subscriptionâ manner. To be specific, user subscription of the terminal is owned by an external entity (for example, a mobile network operator (MNO)) independent of the SNPN network, and the SNPN network allows the terminal of this type to access the SNPN by using the external subscription.
So far, if a terminal device (UE) needs to access the SNPN in the external subscription manner, the terminal device needs to be located in coverage of the SNPN, and cannot be covered by the PLMN. However, during actual application, the terminal device may be located in common coverage of the SNPN and the PLMN, or the terminal device may be located only in coverage of the PLMN. In the two cases, there is no good method for the terminal device to access the SNPN.
SUMMARY
This application provides a communication method, to enable a terminal device to obtain SNPN network selection information of the terminal device from a PLMN or an SNPN, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the SNPN network selection information, and access the SNPN.
According to a first aspect, a communication method is provided. The method includes: A first network device receives a first message. The first message includes an identifier of a terminal device. The first network device determines first network selection information. The first network selection information includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN. The first network device sends a second message. The second message includes the first network selection information.
The SNPN network selection information is provided for the terminal device, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the SNPN network selection information, and access the SNPN.
With reference to the first aspect, in some implementations of the first aspect, that the first network device determines first network selection information includes: The first network device determines the first network selection information based on at least one of subscription data, policy data, and a local configuration of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, that the first network device determines the first network selection information based on at least one of subscription data, policy data, and a local configuration of the terminal device further includes: If the subscription data and the policy data of the terminal device coexist, the first network device preferentially determines the first network selection information based on the policy data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network device is an access and mobility management function network element AMF, and before the first network device determines first network selection information, the method further includes: The first network device sends a third message to a unified data management network element UDM. The third message is used to obtain the subscription data of the terminal device, and the subscription data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN. The first network device receives a fourth message sent by the UDM. The fourth message includes the subscription data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network selection information is the subscription data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network device is an AMF, and before the first network device determines first network selection information, the method further includes: The first network device sends a fifth message to a policy control function network element PCF. The fifth message is used to obtain the policy data of the terminal device, and the policy data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN. The first network device receives a sixth message sent by the PCF. The sixth message includes the policy data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the first network selection information is the policy data of the terminal device.
With reference to the first aspect, in some implementations of the first aspect, the information about the SNPN that allows the terminal device to access includes an identifier of the SNPN that allows the terminal device to access.
The information including the identifier of the SNPN that allows the terminal device to access is sent to the terminal device, so that the terminal device may select, based on the network selection information, the SNPN to access.
With reference to the first aspect, in some implementations of the first aspect, the information about the SNPN that allows the terminal device to access further includes first priority information, indicating a priority sequence of the SNPN that allows the terminal device to access.
The priority information of the SNPN is specified, so that when being in coverage of different SNPNs or coverage of both the SNPN and the PLMN, the terminal device can select a most appropriate SNPN to access.
With reference to the first aspect, in some implementations of the first aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that does not allow the terminal device to access and/or indication information indicating that the terminal device is not allowed to access a PLMN.
The identifier of the PLMN that does not allow the terminal device to access and/or the indication information indicating that the terminal device is not allowed to access a PLMN are/is sent to the terminal device, so that when the terminal device is covered by both the PLMN and the SNPN, the terminal device can select the SNPN to access, or when the terminal device is covered by only the PLMN, the terminal device does not select the PLMN.
With reference to the first aspect, in some implementations of the first aspect, the local configuration includes information indicating that the terminal device is not allowed to access a PLMN and/or information indicating that the terminal is capable of accessing only the SNPN.
In a local configuration manner, when the terminal device attempts to access the PLMN, the network device may reject the terminal device from accessing the PLMN, and indicate, by determining the first network selection information, the terminal device to access the SNPN.
With reference to the first aspect, in some implementations of the first aspect, before the first network device sends a second message, the method further includes: The first network element marks the terminal device as being in a roaming state. A serving network of the terminal device is a PLMN, and a home network of the terminal device is an SNPN.
The terminal device that is actually in a non-roaming state is marked as being in the roaming state, so that the terminal device can access the SNPN by using the PLMN.
With reference to the first aspect, in some implementations of the first aspect, that the first network element marks the terminal device as being in a roaming state includes: The first network element marks, based on the local configuration or the subscription data of the terminal device, the terminal device as being in the roaming state. The local configuration includes an identifier that is of a terminal device in a specific range and that is allocated to the SNPN for use, or first indication information that indicates the first network element to mark, when an identifier of the terminal device includes an identifier of a specific SNPN, the terminal device as being in the roaming state. The subscription data of the terminal device includes second indication information, and the second indication information indicates that if the terminal device performs access from a PLMN, the terminal device enters the roaming state, or the second indication information indicates that the home network of the terminal device is an SNPN.
With reference to the first aspect, in some implementations of the first aspect, the method further includes: The first network device receives a seventh message sent by the terminal device. The seventh message is used to request to establish a first protocol data unit PDU session of a data network name DNN/single network slice selection assistance information S-NSSAI. The first network element establishes the first PDU session in a non-roaming manner when the subscription of the terminal device indicates that the first PDU session is home routed HR roaming, or establishes the first PDU session in an HR roaming manner when the subscription of the terminal device indicates that the first PDU session is local breakout LBO roaming.
The manner of indicating to establish the PDU session is used, so that the terminal device can implement logical conversion in an actual non-roaming case, access the SNPN by using the PLMN, and visit a service of the PLMN or the SNPN.
With reference to the first aspect, in some implementations of the first aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that allows the terminal device to access and second priority information. The second priority information indicates a priority sequence of the PLMN that allows the terminal device to access, and a priority indicated by the second priority information is lower than a priority indicated by the first priority information.
The network selection information including the identifier of the PLMN that allows the terminal device to access and the second priority information is sent, so that the terminal device can select the PLMN when the terminal device is not covered by the SNPN, access the SNPN by using the PLMN, and preferentially access the SNPN based on the priority information when the terminal device is located in coverage of both the PLMN and the SNPN.
With reference to the first aspect, in some implementations of the first aspect, the first network device belongs to an SNPN, the first network device sends the second message to a third network device, and the third network device belongs to a PLMN.
Optionally, the first network device may belong to the SNPN, or may belong to the PLMN.
According to a second aspect, a communication method is provided. The method includes: A second network device receives a first message. The first message includes an identifier of a terminal device. The second network device sends a second message. The second message includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN.
The related SNPN network selection information is provided, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the related SNPN network selection information, and access the SNPN.
With reference to the second aspect, in some implementations of the second aspect, the second network device is a unified data management network element UDM, the second message is subscription data of the terminal device, and the subscription data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN.
With reference to the second aspect, in some implementations of the second aspect, the second network device is a policy control function network element PCF, the second message is policy data of the terminal device, and the policy data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN.
With reference to the second aspect, in some implementations of the second aspect, the information about the SNPN that allows the terminal device to access includes at least one of the following information: indication information indicating that access from only the SNPN is allowed; an identifier of the SNPN that allows access; or first priority information, indicating a priority of the SNPN that allows access.
The information including the SNPN that allows access is provided for the terminal device, so that the terminal device can select the SNPN to access.
With reference to the second aspect, in some implementations of the second aspect, the information about whether the terminal device is allowed to access a PLMN includes at least one of the following information: indication information indicating that access from a PLMN is not allowed; or an identifier of a PLMN that does not allow access.
Information about the PLMN that does not allow access is provided for the terminal device, so that the terminal device does not access the PLMN when the terminal device is covered by both the PLMN and the SNPN or when the terminal device is located in coverage of only the PLMN.
With reference to the second aspect, in some implementations of the second aspect, when the information about the SNPN that allows the terminal device to access includes an identifier of the SNPN that allows access and first priority information, the information about whether the terminal device is allowed to access a PLMN includes at least one of the following information: indication information indicating that access to a PLMN is allowed; an identifier of a PLMN that allows access; or second priority information, indicating a priority of the PLMN that allows access. The priority indicated by the second priority information is lower than a priority indicated by the first priority information.
Information about the PLMN that allows access is provided for the terminal device, so that the terminal device can access the SNPN by using the PLMN, or when the terminal device is covered by both the PLMN and the SNPN, the terminal device can preferentially select the SNPN to access.
According to a third aspect, a communication method is provided. The method includes: A terminal device sends a first message. The first message includes an identifier of the terminal device. The terminal device receives a second message. The second message includes first network selection information, and the first network selection information includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN.
The SNPN network selection information is obtained, so that when being located in coverage of different networks, the terminal device can select the SNPN or the PLMN by using the SNPN network selection information, and access the SNPN.
With reference to the third aspect, in some implementations of the third aspect, the information about the SNPN that allows the terminal device to access includes an identifier of the SNPN that allows the terminal device to access.
The information including the identifier of the SNPN that allows the terminal device to access is received, so that the terminal device may select, based on the network selection information, the SNPN to access.
With reference to the third aspect, in some implementations of the third aspect, the information about the SNPN that allows the terminal device to access further includes first priority information, indicating a priority sequence of the SNPN that allows the terminal device to access.
The priority information of the SNPN is specified, so that when being in coverage of different SNPNs or coverage of both the SNPN and the PLMN, the terminal device can select a most appropriate SNPN to access.
With reference to the third aspect, in some implementations of the third aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that does not allow the terminal device to access and/or indication information indicating that the terminal device is not allowed to access a PLMN.
The identifier of the PLMN that does not allow the terminal device to access and/or the indication information indicating that the terminal device is not allowed to access a PLMN are/is received, so that when the terminal device is covered by both the PLMN and the SNPN, the terminal device can select the SNPN to access, or when the terminal device is covered by only the PLMN, the terminal device does not select the PLMN.
With reference to the third aspect, in some implementations of the third aspect, the method further includes: The terminal device forbids a PLMN network selection function based on the first network selection information.
Based on the SNPN network selection information, the terminal device may correspondingly forbid the PLMN network selection function, so that the terminal device does not select the PLMN when subsequently searching for a network to access.
With reference to the third aspect, in some implementations of the third aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that allows the terminal device to access and second priority information. The second priority information indicates a priority sequence of the PLMN that allows the terminal device to access, and a priority of the second priority information is lower than a priority of the first priority information.
The identifier of the PLMN that allows the terminal device to access and the network selection information of the second priority information are received, so that when the terminal device is not covered by the SNPN, the terminal device can access the SNPN by using the PLMN, and preferentially access the SNPN based on the priority information when the terminal device is located in coverage of both the PLMN and the SNPN.
With reference to the third aspect, in some implementations of the third aspect, the method further includes: The terminal device updates a network selection configuration of the terminal device based on the first network selection information.
The SNPN network selection information sent by the network device is received and the configuration is updated, so that the terminal device can determine and select a to-be-accessed SNPN based on updated information.
According to a fourth aspect, a communication apparatus is provided. The apparatus includes a first receiving module, configured to receive a first message, where the first message includes an identifier of a terminal device; a first processing module, configured to determine first network selection information, where the first network selection information includes at least one of information about a standalone non-public network SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a public land mobile network PLMN; and a first sending module, configured to send a second message, where the second message includes the first network selection information.
With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically configured to determine the first network selection information based on at least one of subscription data, policy data, and a local configuration of the terminal device.
With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is further configured to: if the subscription data and the policy data of the terminal device coexist, preferentially determine the first network selection information based on the policy data of the terminal device.
With reference to the fourth aspect, in some implementations of the fourth aspect, the apparatus is an access and mobility management function network element AMF, and the first sending module is further configured to send a third message to a unified data management network element UDM. The third message is used to obtain the subscription data of the terminal device. The subscription data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN. The first receiving module is further configured to receive a fourth message sent by the UDM. The fourth message includes the subscription data of the terminal device.
With reference to the fourth aspect, in some implementations of the fourth aspect, the first network selection information is the subscription data of the terminal device.
With reference to the fourth aspect, in some implementations of the fourth aspect, the first sending module is further configured to send a fifth message to a policy control function network element PCF. The fifth message is used to obtain the policy data of the terminal device. The policy data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN. The first receiving module is further configured to receive a sixth message sent by the PCF. The sixth message includes the policy data of the terminal device.
With reference to the fourth aspect, in some implementations of the fourth aspect, the first network selection information is the policy data of the terminal device.
With reference to the fourth aspect, in some implementations of the fourth aspect, the information about the SNPN that allows the terminal device to access includes an identifier of the SNPN that allows the terminal device to access.
With reference to the fourth aspect, in some implementations of the fourth aspect, the information about the SNPN that allows the terminal device to access further includes first priority information, indicating a priority sequence of the SNPN that allows the terminal device to access.
With reference to the fourth aspect, in some implementations of the fourth aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that does not allow the terminal device to access and/or indication information indicating that the terminal device is not allowed to access a PLMN.
With reference to the fourth aspect, in some implementations of the fourth aspect, the local configuration includes information indicating that the terminal device is not allowed to access a PLMN and/or information indicating that the terminal is capable of accessing only the SNPN.
With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is further configured to mark the terminal device as being in a roaming state. A serving network of the terminal device is a PLMN, and a home network of the terminal device is an SNPN.
With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically configured to mark, based on the local configuration or the subscription data of the terminal device, the terminal device as being in the roaming state. The local configuration includes an identifier that is of a terminal device in a specific range and that is allocated to the SNPN for use, or first indication information that indicates the first network element to mark, when an identifier of the terminal device includes an identifier of a specific SNPN, the terminal device as being in the roaming state. The subscription data of the terminal device includes second indication information, and the second indication information indicates that if the terminal device performs access from a PLMN, the terminal device enters the roaming state, or the second indication information indicates that the home network of the terminal device is an SNPN.
With reference to the fourth aspect, in some implementations of the fourth aspect, the first receiving module is further configured to receive a seventh message sent by the terminal device. The seventh message is used to request to establish a first protocol data unit PDU session of a data network name DNN/single network slice selection assistance information S-NSSAI. The processing module is further configured to establish the first PDU session in a non-roaming manner when the subscription of the terminal device indicates that the first PDU session is home routed HR roaming, or establish the first PDU session in an HR roaming manner when the subscription of the terminal device indicates that the first PDU session is local breakout LBO roaming.
With reference to the fourth aspect, in some implementations of the fourth aspect, the information about whether the terminal device is allowed to access a PLMN includes an identifier of a PLMN that allows the terminal device to access and second priority information. The second priority information indicates a priority sequence of the PLMN that allows the terminal device to access, and a priority indicated by the second priority information is lower than a priority indicated by the first priority information.
With reference to the fourth aspect, in some implementations of the fourth aspect, the apparatus belongs to an SNPN, the apparatus sends the second message to a third network device, and the third network device belongs to a PLMN.
According to a fifth aspect, a communication apparatus is provided. The apparatus includes a second receiving module, configured to receive a first message, where the first message includes an identifier of a terminal device; and a second sending module, configured to send a second message, where the second message includes at least one of information about an SNPN that allows the terminal device to access and information about whether the terminal device is allowed to access a PLMN.
With reference to the fifth aspect, in some implementations of the fifth aspect, the apparatus is a unified data management network element UDM, the second message is subscription data of the terminal device, and the subscription data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN.
With reference to the fifth aspect, in some implementations of the fifth aspect, the apparatus is a PCF, the second message is policy data of the terminal device, and the policy data includes at least one of the information about the SNPN that allows the terminal device to access and the information about whether the terminal device is allowed to access a PLMN.
With reference to the fifth aspect, in some implementations of the fifth aspect, the information about the SNPN that allows the terminal device to access includes at least one of the following information: indication information indicating that access from only the SNPN is allowed; an identifier of the SNPN that allows access; or first priority information, indicating a priority of the SNPN that allows access.
With reference to the fifth aspect, in some implementations of the fifth aspect, the information about whether the terminal device is allowed to access a PLMN includes at least one of the following information: indication information indicating that access from a PLMN is not allowed; or an identifier of a PLMN that does not allow access.
With reference to the fifth aspect, in some implementations of the fifth aspect, when the information about the SNPN that allows the terminal device to access includes an identifier of the SNPN that allows access and first priority information, the information about whether the terminal device is allowed to access a PLMN includes at least one of the following information: indication information indicating that access to a PLMN is allowed; an identifier of the PLMN that allows access; or second priority information, indicating a priority of the PLMN that allows access. The priority indicated by the second priority information is lower than a priority indicated by the first priority information.
According to a sixth aspect, a communication apparatus is provided. The apparatus includes a third sending module, configured to send a first message, where the first message includes an identifier of the apparatus; and a third receiving module, configured to receive a second message, where the second message includes first network selection information, and the first network selection information includes at least one of information about a standalone non-public network SNPN that allows the apparatus to access and information about whether the apparatus is allowed to access a public land mobile network PLMN.
With reference to the sixth aspect, in some implementations of the sixth aspect, the information about the SNPN that allows the apparatus to access includes an identifier of the SNPN that allows the apparatus to access.
With reference to the sixth aspect, in some implementations of the sixth aspect, the information about the SNPN that allows the apparatus to access further includes first priority information, indicating a priority sequence of the SNPN that allows the apparatus to access.
With reference to the sixth aspect, in some implementations of the sixth aspect, the information about whether the apparatus is allowed to access a PLMN includes an identifier of a PLMN that does not allow the apparatus to access and/or indication information indicating that the apparatus is not allowed to access a PLMN.
With reference to the sixth aspect, in some implementations of the sixth aspect, the apparatus further includes a second processing module, configured to forbid a PLMN network selection function based on the first network selection information.
With reference to the sixth aspect, in some implementations of the sixth aspect, the information about whether the apparatus is allowed to access a PLMN includes an identifier of a PLMN that allows the apparatus to access and second priority information. The second priority information indicates a priority sequence of the PLMN that allows the apparatus to access, and a priority of the second priority information is lower than a priority of the first priority information.
With reference to the sixth aspect, in some implementations of the sixth aspect, the apparatus further includes a third processing module, configured to update a network selection configuration of the apparatus based on the first network selection information.
According to a seventh aspect, a communication apparatus is provided. The communication apparatus has a function of implementing the method according to the first aspect. The function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or the software includes one or more modules corresponding to the function.
According to an eighth aspect, a communication apparatus is provided. The communication apparatus has a function of implementing the method according to the second aspect. The function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or the software includes one or more modules corresponding to the function.
According to a ninth aspect, a communication apparatus is provided. The communication apparatus has a function of implementing the method according to the third aspect. The function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or the software includes one or more modules corresponding to the function.
According to a tenth aspect, a communication apparatus is provided, including a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke the computer program from the memory and run the computer program, to enable the communication device to perform the method according to any one of the first aspect or the possible implementations of the first aspect.
According to an eleventh aspect, a communication apparatus is provided, including a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke the computer program from the memory and run the computer program, to enable the communication device to perform the method according to any one of the second aspect or the possible implementations of the second aspect.
According to a twelfth aspect, a communication apparatus is provided, including a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke the computer program from the memory and run the computer program, to enable the communication device to perform the method according to any one of the third aspect or the possible implementations of the third aspect.
According to a thirteenth aspect, a communication apparatus is provided, and includes a processor. The processor is configured to: after being coupled to a memory, and reading instructions in the memory, perform, according to the instructions, the method according to any one of the first aspect.
According to a fourteenth aspect, a communication apparatus is provided, and includes a processor. The processor is configured to: after being coupled to a memory, and reading instructions in the memory, perform, according to the instructions, the method according to any one of the second aspect.
According to a fifteenth aspect, a communication apparatus is provided, and includes a processor. The processor is configured to: after being coupled to a memory, and reading instructions in the memory, perform, according to the instructions, the method according to any one of the third aspect.
According to a sixteenth aspect, a communication apparatus is provided. The communication apparatus includes a processor and an interface circuit. The interface circuit may be a code/data read and write interface circuit, and the interface circuit is configured to receive computer-executable instructions (where the computer-executable instructions are stored in a memory, and may be directly read from the memory or may be read through another component) and transmit the computer-executable instructions to the processor. The processor is configured to run the computer-executable instructions to perform the method according to any one of the first aspect.
According to a seventeenth aspect, a communication apparatus is provided. The communication apparatus includes a processor and an interface circuit. The interface circuit may be a code/data read and write interface circuit, and the interface circuit is configured to receive computer-executable instructions (where the computer-executable instructions are stored in a memory, and may be directly read from the memory or may be read through another component) and transmit the computer-executable instructions to the processor. The processor is configured to run the computer-executable instructions to perform the method according to any one of the second aspect.
According to an eighteenth aspect, a communication apparatus is provided. The communication apparatus includes a processor and an interface circuit. The interface circuit may be a code/data read and write interface circuit, and the interface circuit is configured to receive computer-executable instructions (where the computer-executable instructions are stored in a memory, and may be directly read from the memory or may be read through another component) and transmit the computer-executable instructions to the processor. The processor is configured to run the computer-executable instructions to perform the method according to any one of the third aspect.
According to a nineteenth aspect, an apparatus (for example, the apparatus may be a chip system) is provided. The apparatus includes a processor, configured to support the communication apparatus in implementing the functions in the first aspect. In a possible design, the apparatus further includes a memory, and the memory is configured to store program instructions and data that are necessary for the communication apparatus. When the apparatus is a chip system, the apparatus may include a chip, or may include a chip and another discrete component.
According to a twentieth aspect, an apparatus (for example, the apparatus may be a chip system) is provided. The apparatus includes a processor, configured to support the communication apparatus in implementing the functions in the second aspect. In a possible design, the apparatus further includes a memory, and the memory is configured to store program instructions and data that are necessary for the communication apparatus. When the apparatus is a chip system, the apparatus may include a chip, or may include a chip and another discrete component.
According to a twenty-first aspect, an apparatus (for example, the apparatus may be a chip system) is provided. The apparatus includes a processor, configured to support the communication apparatus in implementing the functions in the third aspect. In a possible design, the apparatus further includes a memory, and the memory is configured to store program instructions and data that are necessary for the communication apparatus. When the apparatus is a chip system, the apparatus may include a chip, or may include a chip and another discrete component.
According to a twenty-second aspect, a computer-readable storage medium is provided, configured to store a computer program. The computer program includes instructions used to perform the method according to any one of the first aspect or the possible implementations of the first aspect.
According to a twenty-third aspect, a computer-readable storage medium is provided, configured to store a computer program. The computer program includes instructions used to perform the method according to any one of the second aspect or the possible implementations of the second aspect.
According to a twenty-fourth aspect, a computer-readable storage medium is provided, configured to store a computer program. The computer program includes instructions used to perform the method according to any one of the third aspect or the possible implementations of the third aspect.
According to a twenty-fifth aspect, a computer program product is provided, including a computer program. When the computer program is run on a computer device, the computer device is enabled to perform the method according to the first aspect.
According to a twenty-sixth aspect, a computer program product is provided, including a computer program. When the computer program is run on a computer device, the computer device is enabled to perform the method according to the second aspect.
According to a twenty-seventh aspect, a computer program product is provided, including a computer program. When the computer program is run on a computer device, the computer device is enabled to perform the method according to the third aspect.
According to a twenty-eighth aspect, a communication system is provided. The communication system includes a first network device, a second network device, and a terminal device. The first network device is configured to perform the steps performed by the first network device in the first aspect or the solutions provided in embodiments of this application. The second network device is configured to perform the steps performed by the second network device in the second aspect or the solutions provided in embodiments of this application. The terminal device is configured to perform the steps performed by the terminal device in the third aspect or the solutions provided in embodiments of this application. Optionally, the communication system further includes a third network device. The third network device is configured to perform the steps performed by the third network device in the first aspect or the solutions provided in embodiments of this application.
These or other aspects of this application are more concise and easier to understand in the description of the following embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram of an architecture of a 5G mobile communication system;
FIG. 2 is a schematic diagram of an application scenario according to an embodiment of this application;
FIG. 3 is a schematic diagram of a communication method according to an embodiment of this application;
FIG. 4 is a schematic diagram of another communication method according to an embodiment of this application;
FIG. 5 is a schematic diagram of another communication method according to an embodiment of this application;
FIG. 6 is a schematic diagram of a network interaction procedure according to an embodiment of this application;
FIG. 7 is a schematic diagram of another network interaction procedure according to an embodiment of this application;
FIG. 8 is a schematic diagram of another network interaction procedure according to an embodiment of this application;
FIG. 9 is a schematic diagram of another network interaction procedure according to an embodiment of this application;
FIG. 10 is a schematic diagram of a network interworking architecture between an SNPN and a PLMN according to an embodiment of this application;
FIG. 11 A and FIG. 11 B are a schematic diagram of another network interworking architecture between an SNPN and a PLMN according to an embodiment of this application;
FIG. 12 is a schematic diagram of an N3IWF architecture in a conventional technology;
FIG. 13 is a schematic diagram of another network interaction procedure according to an embodiment of this application;
FIG. 14 is a schematic diagram of a communication apparatus according to an embodiment of this application;
FIG. 15 is a schematic diagram of another communication apparatus according to an embodiment of this application;
FIG. 16 is a schematic diagram of another communication apparatus according to an embodiment of this application;
FIG. 17 is a schematic diagram of another communication apparatus according to an embodiment of this application;
FIG. 18 is a schematic diagram of another communication apparatus according to an embodiment of this application; and
FIG. 19 is a schematic diagram of another communication apparatus according to an embodiment of this application.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
The following describes technical solutions of this application with reference to accompanying drawings.
The technical solutions in embodiments of this application may be applied to various communication systems, for example, a global system for mobile communications (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunications system (UMTS), a world interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) system or a new radio (NR) system, or a future evolved communication system.
FIG. <b
CLAIMS
Claims ( 21 )
1 .- 20 . (canceled)
21 . A method, comprising:
receiving, by a first network device, a first message, wherein the first message comprises an identifier of a terminal device; determining, by the first network device, first network selection information, wherein the first network selection information comprises at least one of information about a standalone non-public network (SNPN) that allows access by the terminal device or information about whether the terminal device is allowed to access a public land mobile network (PLMN); and sending, by the first network device, a second message, wherein the second message comprises the first network selection information.
22 . The method according to claim 21 , wherein determining, by the first network device, the first network selection information comprises:
determining, by the first network device, the first network selection information based on at least one of subscription data, policy data, or a local configuration of the terminal device.
23 . The method according to claim 22 , wherein determining, by the first network device, the first network selection information based on at least one of the subscription data, the policy data, or the local configuration of the terminal device comprises:
when the subscription data and the policy data of the terminal device coexist, preferentially determining, by the first network device, the first network selection information based on the policy data of the terminal device.
24 . The method according to claim 21 , wherein the first network device is an access and mobility management function network element (AMF), and before determining, by the first network device, the first network selection information, the method further comprises:
sending, by the first network device, a third message to a unified data management network element (UDM), wherein the third message is used to obtain subscription data of the terminal device, and the subscription data comprises at least one of the information about the SNPN that allows access by the terminal device or the information about whether the terminal device is allowed to access a PLMN; and receiving, by the first network device, a fourth message sent by the UDM, wherein the fourth message comprises the subscription data of the terminal device.
25 . The method according to claim 21 , wherein the first network device is an access and mobility management function network element (AMF), and before determining, by the first network device, the first network selection information, the method further comprises:
sending, by the first network device, a fifth message to a policy control function network element (PCF), wherein the fifth message is used to obtain policy data of the terminal device, and the policy data comprises at least one of the information about the SNPN that allows access by the terminal device or the information about whether the terminal device is allowed to access a PLMN; and receiving, by the first network device, a sixth message sent by the PCF, wherein the sixth message comprises the policy data of the terminal device.
26 . A method, comprising:
sending, by a terminal device, a first message, wherein the first message comprises an identifier of the terminal device; and receiving, by the terminal device, a second message, wherein the second message comprises first network selection information, and the first network selection information comprises at least one of information about a standalone non-public network (SNPN) that allows access by the terminal device or information about whether the terminal device is allowed to access a public land mobile network (PLMN).
27 . The method according to claim 26 , wherein the information about the SNPN that allows access by the terminal device comprises:
an identifier of the SNPN that allows access by the terminal device.
28 . The method according to claim 27 , wherein the information about the SNPN that allows access by the terminal device further comprises:
first priority information indicating a priority sequence of the SNPN that allows access by the terminal device.
29 . The method according to claim 26 , wherein the information about whether the terminal device is allowed to access the PLMN comprises:
an identifier of a PLMN that does not allow the terminal device to access or indication information indicating that the terminal device is not allowed to access the PLMN.
30 . The method according to claim 26 , further comprising:
forbidding, by the terminal device, a PLMN network selection function based on the first network selection information.
31 . An apparatus, comprising:
at least one processor; and a memory coupled to the at least one processor and having program instructions stored thereon which, when executed by the at least one processor, cause the apparatus to:
receive a first message, wherein the first message comprises an identifier of a terminal device;
determine first network selection information, wherein the first network selection information comprises at least one of information about a standalone non-public network (SNPN) that allows access by the terminal device or information about whether the terminal device is allowed to access a public land mobile network (PLMN); and
send a second message, wherein the second message comprises the first network selection information.
32 . The apparatus according to claim 31 , wherein determining the first network selection information comprises:
determining the first network selection information based on at least one of subscription data, policy data, or a local configuration of the terminal device.
33 . The apparatus according to claim 32 , wherein determining the first network selection information based on at least one of the subscription data, the policy data, or the local configuration of the terminal device comprises:
when the subscription data and the policy data of the terminal device coexist, preferentially determining the first network selection information based on the policy data of the terminal device.
34 . The apparatus according to claim 31 , wherein the apparatus is an access and mobility management function network element (AMF), and the program instructions, when executed by the at least one processor, further cause the apparatus to:
send a third message to a unified data management network element (UDM), wherein the third message is used to obtain subscription data of the terminal device, and the subscription data comprises at least one of the information about the SNPN that allows access by the terminal device or the information about whether the terminal device is allowed to access the PLMN; and receive a fourth message sent by the UDM, wherein the fourth message comprises the subscription data of the terminal device.
35 . The apparatus according to claim 31 , wherein the apparatus is an access and mobility management function network element (AMF), the program instructions, when executed by the at least one processor, further cause the apparatus to:
send a fifth message to a policy control function network element (PCF), wherein the fifth message is used to obtain policy data of the terminal device, and the policy data comprises at least one of the information about the SNPN that allows access by the terminal device or the information about whether the terminal device is allowed to access a PLMN; and receive a sixth message sent by the PCF, wherein the sixth message comprises the policy data of the terminal device.
36 . An apparatus, applied to a terminal device, the apparatus comprising:
at least one processor; and a memory coupled to the at least one processor and having program instructions stored thereon which, when executed by the at least one processor, cause the apparatus to:
send a first message, wherein the first message comprises an identifier of the terminal device; and
receive a second message, wherein the second message comprises first network selection information, and the first network selection information comprises at least one of information about a standalone non-public network (SNPN) that allows access by the terminal device or information about whether the terminal device is allowed to access a public land mobile network (PLMN).
37 . The apparatus according to claim 36 , wherein the information about the SNPN that allows access by the terminal device comprises:
an identifier of the SNPN that allows access by the terminal device.
38 . The apparatus according to claim 37 , wherein the information about the SNPN that allows access by the terminal device further comprises:
first priority information indicating a priority sequence of the SNPN that allows the terminal device to access.
39 . The apparatus according to claim 36 , wherein the information about whether the terminal device is allowed to access the PLMN comprises:
an identifier of the PLMN that does not allow the terminal device to access or indication information indicating that the terminal device is not allowed to access the PLMN.
40 . The apparatus according to claim 36 , wherein the program instructions, when executed by the at least one processor, further cause the apparatus to:
forbid a PLMN network selection function based on the first network selection information.
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Title
US20220408502A1
( en )
*
2020-02-29
2022-12-22
Huawei Technologies Co., Ltd.
Communication method and apparatus
US12207324B2
( en )
*
2020-02-29
2025-01-21
Huawei Technologies Co., Ltd.
Communication method and apparatus
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( en )
*
2020-05-21
2021-11-25
Samsung Electronics Co., Ltd.
Method and apparatus for discovering and selecting network providing connectivity for provisioning user subscription data
US11968616B2
( en )
*
2020-05-21
2024-04-23
Samsung Electronics Co., Ltd.
Method and apparatus for discovering and selecting network providing connectivity for provisioning user subscription data
US20240244516A1
( en )
*
2020-05-21
2024-07-18
Samsung Electronics Co., Ltd.
Method and apparatus for discovering and selecting network providing connectivity for provisioning user subscription data
US12302230B2
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2020-05-22
2025-05-13
Apple Inc.
Manual network selection at a user equipment
US20230224806A1
( en )
*
2020-06-19
2023-07-13
Hao Zhang
Recovery from authentication failure
US20220053444A1
( en )
*
2020-08-13
2022-02-17
Alibaba Group Holding Limited
Network Communication Method and Apparatus
EP4529281A4
( en )
*
2022-06-30
2025-10-08
Huawei Tech Co Ltd
NETWORK ACCESS METHOD AND COMMUNICATION DEVICE
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CN113630843A
( en )
2021-11-09
KR20230005371A
( en )
2023-01-09
CN113630843B
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2023-04-18
EP4135411A4
( en )
2023-06-28
WO2021227627A1
( en )
2021-11-18
EP4135411A1
( en )
2023-02-15
JP2023524163A
( en )
2023-06-08
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