CN113923682A

CN113923682A - Communication method, device and system

Info

Publication number: CN113923682A
Application number: CN202010645155.6A
Authority: CN
Inventors: 李永翠; 辛阳; 倪慧
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2022-01-11
Anticipated expiration: 2040-07-07
Also published as: CN113923682B

Abstract

The application provides a communication method, a device and a system. The method comprises the following steps: the home domain policy control network element sends policy information to a home domain session management network element, wherein the policy information comprises an identifier of at least one service data stream and a first QoS parameter corresponding to the at least one service data stream; the home domain strategy control network element receives feedback information from the home domain session management network element; and the home domain policy control network element determines not to send the QoS parameters which are higher than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the feedback information. Based on the scheme, the home domain policy control network element can determine not to send the QoS request to the VPLMN according to the received feedback information, thereby being beneficial to avoiding signaling waste caused by the HPLMN frequently sending the QoS request to the VPLMN and saving signaling overhead.

Description

Communication method, device and system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, apparatus, and system.

Background

Currently, in a home domain routing roaming scenario, in a session establishment process, a visited domain session management function (V-SMF) network element determines to reject a session of a home domain PLMN (home PLMN, HPLMN) or an establishment request of a partial Quality of Service (QoS) flow of the session according to a policy of a visited domain public land mobile network (VPLMN). In the session modification process, the V-SMF network element determines to reject the modification request of the session of the HPLMN or part of the QoS flow of the session according to the strategy of the VPLMN.

However, since the HPLMN or Application Function (AF) network element is not aware of the VPLMN policy, the HPLMN or AF network element may frequently initiate QoS setup or modification requests, but the V-SMF may always reject the QoS setup or modification requests, causing additional signaling overhead.

Disclosure of Invention

The application provides a communication method, a communication device and a communication system, which are used for reducing signaling overhead.

In a first aspect, an embodiment of the present application provides a communication method, including: a home domain policy control network element sends policy information to a home domain session management network element, wherein the policy information comprises an identifier of at least one service data stream and a first quality of service (QoS) parameter corresponding to the at least one service data stream; the home domain policy control network element receives feedback information from the home domain session management network element; and the home domain policy control network element determines not to send QoS parameters with higher requirements than QoS parameters rejected by a visited domain public land mobile network VPLMN and/or QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the feedback information.

In this embodiment, the QoS parameters with higher requirements than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters may also be referred to as third QoS parameters.

Based on the scheme, in a home domain roaming scenario, the home domain policy control network element can determine not to send the QoS request to the VPLMN according to the received feedback information, thereby being beneficial to avoiding signaling waste caused by the HPLMN frequently sending the QoS request to the VPLMN and saving signaling overhead.

In a possible implementation method, the feedback information includes an identifier of a rejected service data flow in the at least one service data flow, where the rejected service data flow is a service data flow corresponding to a QoS parameter rejected by the VPLMN in the first QoS parameter; the determining, by the home domain policy control network element according to the feedback information, that the QoS parameter with a higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter is not sent to the home domain session management network element includes: and the home domain policy control network element determines not to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the identifier of the rejected service data stream.

Based on the scheme, the home domain policy control network element may determine not to send, to the home domain session management network element, the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter, according to the service data flow corresponding to the QoS parameter rejected by the VPLMN.

In a possible implementation method, the feedback information includes an identifier of an allowed service data flow in the at least one service data flow, where the allowed service data flow is a service data flow corresponding to a QoS parameter allowed by the VPLMN in the first QoS parameter; the determining, by the home domain policy control network element according to the feedback information, that the QoS parameter with a higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter is not sent to the home domain session management network element includes: and the home domain policy control network element determines not to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element according to the identifier of the allowed service data stream.

Based on the scheme, the home domain policy control network element may determine not to send, to the home domain session management network element, the QoS parameter that requires higher requirements than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter, according to the service data flow corresponding to the QoS parameter permitted by the VPLMN.

In a possible implementation method, the feedback information includes indication information, where the indication information is used to indicate that the VPLMN cannot satisfy some or all of the QoS parameters in the first QoS parameter; the determining, by the home domain policy control network element according to the feedback information, that the QoS parameter with a higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter is not sent to the home domain session management network element includes: and the home domain policy control network element determines not to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element according to the indication information.

Based on the scheme, the home domain policy control network element may determine not to send, to the home domain session management network element, the QoS parameter that requires higher QoS than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter, according to the indication information.

In a possible implementation method, the feedback information further includes a QoS parameter rejected by the VPLMN in the first QoS parameter, and/or a QoS parameter allowed by the VPLMN in the first QoS parameter.

In a possible implementation method, the feedback information further includes an identifier of a rejected service data flow of the at least one service data flow, and/or an identifier of an allowed service data flow of the at least one service data flow; the rejected service data flow is a service data flow corresponding to the QoS parameter rejected by the VPLMN in the first QoS parameter, and the allowed service data flow is a service data flow corresponding to the QoS parameter allowed by the VPLMN in the first QoS parameter.

In a possible implementation method, the determining, by the home domain policy control network element according to the feedback information, that the QoS parameter with a higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter is not sent to the home domain session management network element includes: and the home domain policy control network element determines not to send the QoS parameters with higher requirements than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element before the VPLMN is changed according to the feedback information.

Based on the scheme, the home domain policy control network element may determine not to send the QoS parameters with higher requirements than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element before the VPLMN is changed, thereby avoiding signaling waste.

In a possible implementation method, the home domain policy control network element receives notification information from the home domain session management network element, where the notification information is used to notify a VPLMN that a change occurs; and the home domain policy control network element determines to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element according to the notification information.

In a possible implementation method, the home domain policy control network element sends a subscription request to the home domain session management network element, where the subscription request is used to subscribe to a PLMN change event.

In one possible implementation, the first QoS parameter includes one or more of the following information: the 5G service quality marks 5QI, and allocates and occupies priority ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

In a second aspect, an embodiment of the present application provides a communication method, including: a home domain session management network element receives a first quality of service (QoS) parameter corresponding to a service data stream from a home domain policy control network element; the home domain session management network element sends a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; the home domain session management network element receives first feedback information from the visit domain session management network element; the home domain session management network element determines that part or all of the second QoS parameters are rejected according to the first feedback information; the home domain session management network element monitors whether the VPLMN is changed; after monitoring that the VPLMN changes, the home domain session management network element sends notification information to a home domain policy control network element, where the notification information is used to notify that the VPLMN changes, and the notification information triggers the home domain policy control network element to send a third QoS parameter to the home domain session management network element, where the third QoS parameter includes a QoS parameter that is rejected by the first VPLMN in the second QoS parameter, and/or a QoS parameter that has a higher requirement than the QoS parameter that is rejected by the first VPLMN.

In a possible implementation method, the home domain session management network element receives the third QoS parameter from the home domain policy control network element; and the home domain session management network element sends a second QoS rule to a visited domain session management network element which belongs to a second VPLMN, wherein the second QoS rule comprises a second identifier of at least one second QoS flow and a fourth QoS parameter corresponding to the at least one second QoS flow, and the fourth QoS parameter is obtained according to the third QoS parameter.

In a possible implementation method, the first feedback information includes an identifier of a rejected QoS flow of the at least one first QoS flow, where the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the first VPLMN in the second QoS parameters; the determining, by the home domain session management network element according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected includes: and the home domain session management network element determines that part or all of the QoS parameters in the second QoS parameters are rejected according to the rejected QoS flow identifier.

In a possible implementation method, the first feedback information includes an identification of an allowed QoS flow of the at least one first QoS flow, where the allowed QoS flow is a QoS flow corresponding to a QoS parameter allowed by the first VPLMN among the second QoS parameters; the determining, by the home domain session management network element according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected includes: and the home domain session management network element determines that part or all of the second QoS parameters are rejected according to the identifier of the allowed QoS flow.

In a possible implementation method, the first feedback information includes first indication information, where the first indication information is used to indicate that the first VPLMN cannot satisfy some or all of the QoS parameters in the second QoS parameters; the determining, by the home domain session management network element according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected includes: and the home domain session management network element determines that part or all of the second QoS parameters are rejected according to the first indication information.

In a possible implementation method, the first feedback information further includes a QoS parameter rejected by the first VPLMN in the second QoS parameter; and/or the QoS parameters allowed by the first VPLMN in the second QoS parameters.

In a possible implementation method, the first feedback information further includes an identifier of a rejected QoS flow of the at least one first QoS flow, and/or an identifier of an allowed QoS flow of the at least one first QoS flow; the rejected QoS flows are QoS flows corresponding to the QoS parameters rejected by the first VPLMN in the second QoS parameters, and the allowed QoS flows are QoS flows corresponding to the QoS parameters allowed by the first VPLMN in the second QoS parameters.

In a possible implementation method, the home domain session management network element sends, according to the first feedback information, second feedback information to the home domain policy control network element, where the second feedback information includes at least one of an identifier of a rejected service data flow, an identifier of an allowed service data flow, and second indication information, the rejected service data flow corresponds to a rejected QoS parameter in the second QoS parameters, the allowed service data flow corresponds to an allowed QoS parameter in the second QoS parameters, and the second indication information is used to indicate that the first VPLMN cannot satisfy part or all of the QoS parameters in the first QoS parameters.

In one possible implementation method, the first QoS parameter and the second QoS parameter include one or more of the following information: the 5G service quality marks 5QI, and allocates and occupies priority ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

In a third aspect, an embodiment of the present application provides a communication method, including: a visited domain session management network element receives a quality of service (QoS) rule from a home domain session management network element, wherein the QoS rule comprises an identifier of at least one QoS flow and a QoS parameter corresponding to the at least one QoS flow; the visited domain session management network element determines that part or all of the QoS parameters cannot be met according to the strategy of a visited domain public land mobile network (VPLMN); and the visited domain session management network element sends indication information to the home domain session management network element, wherein the indication information is used for indicating that the VPLMN cannot meet part or all of the QoS parameters contained in the QoS rules.

In a possible implementation method, the visited domain session management network element sends, to the home domain session management network element, an identifier of a rejected QoS flow in the at least one QoS flow, where the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the VPLMN among QoS parameters included in the QoS rule; and/or the visited domain session management network element sends an identifier of an allowed QoS flow in the at least one QoS flow to the home domain session management network element, where the allowed QoS flow is a QoS flow corresponding to a QoS parameter allowed by the VPLMN in QoS parameters included in the QoS rule.

In a possible implementation method, the visited domain session management network element sends, to the home domain session management network element, a QoS parameter rejected by the VPLMN among QoS parameters included in the QoS rule; and/or the visited domain session management network element sends the QoS parameters allowed by the VPLMN in the QoS parameters contained in the QoS rules to the home domain session management network element.

In one possible implementation, the QoS parameters included in the QoS rule include one or more of the following information: the 5G service quality marks 5QI, and allocates and occupies priority ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

In a fourth aspect, an embodiment of the present application provides a communication method, including: the method comprises the steps that a data analysis network element receives VPLMN information of a visited public land mobile network from a session management network element or at least one terminal device, wherein the VPLMN information comprises measurement parameters of the VPLMN; the data analysis network element determines a data analysis result of the VPLMN according to the VPLMN information, wherein the data analysis result comprises one or more of the following information: the identifier of the VPLMN, the service identifier, the service experience, the session identifier, the identifier of the at least one terminal device, and the maximum supported quality of service (QoS) parameter; and the data analysis network element sends the data analysis result to a home domain core network element, wherein the data analysis result is used for the home domain core network element to judge whether to send a service establishment request to the VPLMN, and the home domain core network element is a home domain policy control network element or a home domain session management network element.

Based on the scheme, in a home domain roaming scenario, the home domain core network element may receive the data analysis result of the VPLMN from the data analysis network element, and further determine whether to send the service establishment request to the VPLMN according to the data analysis result of the VPLMN, thereby helping to avoid signaling overhead waste caused by the home domain core network element frequently sending the service establishment request to the VPLMN, and thus saving signaling overhead.

In a possible implementation method, the data analysis network element receives an analysis subscription request from the home domain core network element, where the analysis subscription request includes an identifier of the VPLMN, and the analysis subscription request is used to subscribe to a data analysis result of the VPLMN; the data analysis network element sends the data analysis result to a core network element of a home domain, and the data analysis result comprises the following steps: and the data analysis network element sends an analysis subscription notification to the core network element of the home domain, wherein the analysis subscription notification comprises the data analysis result.

In one possible implementation, the measurement parameters include one or more of the following information: the data transmission rate of the VPLMN, the time delay of the VPLMN and the QoS parameters of the established QoS flow on the at least one terminal device.

In a possible implementation method, the at least one terminal device includes at least one local breakout LBO terminal device and at least one home domain roaming HR terminal device, and the VPLMN information includes LBO network information and HR network information; the data analysis network element determines the data analysis result of the VPLMN according to the VPLMN information, and the data analysis result comprises the following steps: and the data analysis network element determines the HR network information according to the VPLMN information and determines the data analysis result according to the HR network information.

In a possible implementation method, the LBO network information further includes information of the LBO terminal device, and the HR network information further includes information of the HR terminal device; the data analysis network element receives information of first terminal equipment from a session management network element, wherein the first terminal equipment is HR terminal equipment; and the data analysis network element identifies the HR terminal equipment according to the information of the first terminal equipment and the information of the HR terminal equipment in the at least one terminal equipment.

In a possible implementation method, the information of the LBO terminal device includes an identifier of the LBO terminal device and a session identifier of the LBO terminal device, the information of the HR terminal device includes an identifier of the HR terminal device and a session identifier of the HR terminal device, and the information of the first terminal device includes an identifier of the first terminal device and a session identifier of the first terminal device.

In a possible implementation method, the data analysis network element in any implementation method may be a data analysis network element in a home domain or a data analysis network element in a visited domain.

In a fifth aspect, an embodiment of the present application provides a communication method, including: the home domain core network element receives a data analysis result of the first visited domain public land mobile network VPLMN from the home domain data analysis network element, wherein the data analysis result comprises one or more of the following information: the identifier of the first VPLMN, the service identifier, the first service experience, the session identifier, the identifier of at least one terminal device, and the maximum supported quality of service (QoS) parameter; and the home domain core network element judges whether to send a service establishment request to the first VPLMN or not according to the data analysis result.

Based on the scheme, in a home domain roaming scene, the home domain core network element can receive the data analysis result of the VPLMN from the home domain data analysis network element, and then judge whether to send the service establishment request to the VPLMN according to the data analysis result of the VPLMN, so that the signaling overhead waste caused by the fact that the home domain core network element frequently sends the service establishment request to the VPLMN is avoided, and the signaling overhead can be saved.

In a possible implementation method, the service establishment request includes a first QoS parameter or a second service experience; the step that the home domain core network element judges whether to send a service establishment request to the first VPLMN according to the data analysis result includes: and the home domain core network element determines that the first VPLMN supports the first QoS parameter or the second service experience according to the data analysis result, and then determines to send the service establishment request to the first VPLMN.

In a possible implementation method, the service establishment request includes a first QoS parameter or a second service experience; the step that the home domain core network element judges whether to send a service establishment request to the first VPLMN according to the data analysis result includes: the home domain core network element determines that the first VPLMN does not support the first QoS parameter or the second service experience according to the data analysis result, and determines not to send the service establishment request to the first VPLMN; the home domain core network element sends a subscription request to a home domain session management network element, wherein the subscription request is used for subscribing a PLMN changing event; the home domain core network element receives notification information from the home domain session management network element, wherein the notification information is used for notifying that a VPLMN is changed; and the home domain core network element determines to send the service establishment request to the second VPLMN according to the notification information.

In a possible implementation method, the home domain core network element is a home domain policy control network element or a home domain session management network element.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, where the apparatus may be a home domain policy control network element, and may also be a chip for the home domain policy control network element. The apparatus has a function of implementing each implementation method of the first aspect described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a seventh aspect, an embodiment of the present application provides a communication device, where the device may be a home domain session management network element, and may also be a chip for the home domain session management network element. The apparatus has a function of implementing each implementation method of the second aspect described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In an eighth aspect, an embodiment of the present application provides a communication device, where the device may be a visited domain session management network element, and may also be a chip for the visited domain session management network element. The apparatus has a function of implementing each implementation method of the third aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a ninth aspect, an embodiment of the present application provides a communication apparatus, where the apparatus may be a home domain data analysis network element, and may also be a chip for the home domain data analysis network element. The apparatus has a function of implementing each implementation method of the fourth aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a tenth aspect, an embodiment of the present application provides a communication device, where the device may be a core network element in a home domain (e.g., a session management network element in the home domain, or a policy control network element in the home domain), and may also be a chip for the core network element in the home domain. The apparatus has a function of implementing each implementation method of the fifth aspect described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In an eleventh aspect, an embodiment of the present application provides a communication apparatus, including a processor and a memory; the memory is used for storing computer-executable instructions, and when the apparatus is operated, the processor executes the computer-executable instructions stored in the memory, so that the apparatus executes any of the implementation methods of the first aspect to the fifth aspect.

In a twelfth aspect, embodiments of the present application provide a communication apparatus, which includes means or units (means) for performing each step of any implementation method of the first aspect to the fifth aspect.

In a thirteenth aspect, an embodiment of the present application provides a communication device, including a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and perform any implementation method of the first aspect to the fifth aspect. The processor includes one or more.

In a fourteenth aspect, an embodiment of the present application provides a communication apparatus, including a processor, configured to connect to a memory, and configured to call a program stored in the memory, so as to execute any implementation method of the first aspect to the fifth aspect. The memory may be located within the device or external to the device. And the processor includes one or more.

In a fifteenth aspect, the present application further provides a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the processor to perform any implementation method of the first aspect to the fifth aspect.

Sixteenth, the present application further provides a computer program product, where the computer program product includes a computer program, and when the computer program runs, the method of any implementation of the first to fifth aspects is executed.

In a seventeenth aspect, an embodiment of the present application further provides a chip system, including: a processor configured to perform any of the implementation methods of the first to fifth aspects.

In an eighteenth aspect, an embodiment of the present application further provides a communication system, including: a home domain policy control network element and a home domain session management network element. The home domain policy control network element is configured to send policy information to the home domain session management network element, where the policy information includes an identifier of at least one service data stream and a first quality of service QoS parameter corresponding to the at least one service data stream; receiving second feedback information from the home domain session management network element; and according to the second feedback information, determining not to send QoS parameters with higher requirements than QoS parameters rejected by a Visited Public Land Mobile Network (VPLMN) and/or QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element. The home domain session management network element is configured to receive the policy information from the home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; determining the second feedback information according to the first feedback information; and sending the second feedback information to the home domain policy control network element.

In a nineteenth aspect, an embodiment of the present application further provides a communication system, including: a home domain policy control network element and a home domain session management network element. And the home domain policy control network element is configured to send a first quality of service QoS parameter corresponding to a service data stream to the home domain session management network element. The home domain session management network element is configured to receive the first QoS parameter from the home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; determining that some or all of the second QoS parameters are rejected according to the first feedback information; monitoring whether the VPLMN is changed; after monitoring that the VPLMN changes, sending notification information to the home domain policy control network element, where the notification information is used to notify that the VPLMN changes, and the notification information triggers the home domain policy control network element to send a third QoS parameter to the home domain session management network element, where the third QoS parameter includes a QoS parameter that is rejected by the first VPLMN in the second QoS parameter, and/or a QoS parameter that has a higher requirement than the QoS parameter that is rejected by the first VPLMN.

In a twentieth aspect, an embodiment of the present application further provides a communication system, including: and the home domain data analysis network element and the home domain core network element. The home domain data analysis network element is used for receiving visited domain public land mobile network (VPLMN) information from a session management network element or at least one terminal device, wherein the VPLMN information comprises measurement parameters of a first VPLMN; determining a data analysis result of the first VPLMN according to the VPLMN information, wherein the data analysis result comprises one or more of the following information: the identifier of the first VPLMN, a service identifier, a first service experience, a session identifier, an identifier of the at least one terminal device, and a maximum supported quality of service QoS parameter; and sending the data analysis result to the core network element of the home domain. The home domain core network element is configured to receive the data analysis result from the home domain data analysis network element; and judging whether to send a service establishment request to the first VPLMN according to the data analysis result, wherein the home domain core network element is a home domain policy control network element or a home domain session management network element.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of another communication system provided in an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating a roaming scenario of a 5G home route;

fig. 4 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 5 is a schematic flowchart of another communication method provided in the embodiment of the present application;

fig. 6 is a schematic flowchart of another communication method according to an embodiment of the present application;

fig. 7 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 8 is a schematic diagram of another communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied to apparatus embodiments or system embodiments. In the description of the present application, the term "plurality" means two or more unless otherwise specified.

To solve the problems mentioned in the background, as shown in fig. 1, the present application provides a communication system including a home domain policy control network element and a home domain session management network element. Optionally, the system further includes a visited domain session management network element.

In a first embodiment:

the home domain policy control network element is configured to send policy information to the home domain session management network element, where the policy information includes an identifier of at least one service data stream and a first quality of service QoS parameter corresponding to the at least one service data stream; receiving second feedback information from the home domain session management network element; and according to the second feedback information, determining not to send QoS parameters with higher requirements than QoS parameters rejected by a Visited Public Land Mobile Network (VPLMN) and/or QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element. The home domain session management network element is configured to receive the policy information from the home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; determining the second feedback information according to the first feedback information; and sending the second feedback information to the home domain policy control network element.

In a possible implementation method, the second feedback information includes an identifier of a rejected service data flow in the at least one service data flow, where the rejected service data flow is a service data flow corresponding to a QoS parameter rejected by the VPLMN in the first QoS parameter; the home domain policy control network element is configured to determine, according to the second feedback information, not to send, to the home domain session management network element, a QoS parameter that is required to be higher than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and determining not to send the QoS parameters with higher requirements than those rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the identifier of the rejected service data flow.

In a possible implementation method, the second feedback information includes an identifier of an allowed service data flow in the at least one service data flow, where the allowed service data flow is a service data flow corresponding to the QoS parameter allowed by the VPLMN in the first QoS parameter; the home domain policy control network element is configured to determine, according to the second feedback information, not to send, to the home domain session management network element, a QoS parameter that is required to be higher than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and the QoS parameter refused by the VPLMN is determined not to be sent to the home domain session management network element according to the identifier of the allowed service data flow, where the QoS parameter is more required than the QoS parameter refused by the VPLMN and/or the QoS parameter refused by the VPLMN in the first QoS parameters.

In a possible implementation method, the second feedback information includes second indication information, where the second indication information is used to indicate that the VPLMN cannot satisfy some or all of the QoS parameters in the first QoS parameters; the home domain policy control network element is configured to determine, according to the second feedback information, not to send, to the home domain session management network element, a QoS parameter that is required to be higher than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and the second indication information is used for determining not to send the QoS parameters higher than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element.

In a possible implementation method, the second feedback information further includes a QoS parameter rejected by the VPLMN in the first QoS parameters, and/or a QoS parameter allowed by the VPLMN in the first QoS parameters.

In a possible implementation method, the second feedback information further includes an identifier of a rejected service data flow of the at least one service data flow, and/or an identifier of an allowed service data flow of the at least one service data flow; the rejected service data flow is a service data flow corresponding to the QoS parameter rejected by the VPLMN in the first QoS parameter, and the allowed service data flow is a service data flow corresponding to the QoS parameter allowed by the VPLMN in the first QoS parameter.

In a possible implementation method, the home domain policy control network element is configured to determine, according to the second feedback information, not to send, to the home domain session management network element, a QoS parameter that requires higher requirements than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and determining, according to the second feedback information, not to send the QoS parameters with higher requirements than the QoS parameters rejected by VPLMN and/or the QoS parameters rejected by VPLMN in the first QoS parameters to the home domain session management network element before a change occurs to VPLMN.

In a possible implementation method, the home domain policy control network element is further configured to receive notification information from the home domain session management network element, where the notification information is used to notify a VPLMN that a change occurs; and according to the notification information, determining to send the QoS parameters with higher requirements than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element.

In a possible implementation method, the home domain policy control network element is further configured to send a subscription request to the home domain session management network element, where the subscription request is used to subscribe to a PLMN change event.

In one possible implementation method, the first QoS parameter, the second QoS parameter, and the third QoS parameter respectively include one or more of the following information: the 5G service quality marks 5QI, and allocates and occupies priority ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

In one possible implementation, the first feedback information includes one or more of the following information:

an identifier of a rejected QoS flow in the at least one first QoS flow, where the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the VPLMN in the second QoS parameters;

an identification of an allowed QoS flow of the at least one first QoS flow, the allowed QoS flow corresponding to the QoS parameter allowed by the VPLMN in the second QoS parameters;

first indication information, where the first indication information is used to indicate that the VPLMN cannot satisfy part or all of the QoS parameters in the second QoS parameters.

In a possible implementation method, the visited domain session management element is configured to receive the first QoS rule from the home domain session management element; determining that part or all of the second QoS parameters cannot be met according to the strategy of the VPLMN; and sending the first feedback information to the home domain session management network element.

In a second embodiment:

and the home domain policy control network element is configured to send a first quality of service QoS parameter corresponding to a service data stream to the home domain session management network element. The home domain session management network element is configured to receive the first QoS parameter from the home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; determining that some or all of the second QoS parameters are rejected according to the first feedback information; monitoring whether the VPLMN is changed; after monitoring that the VPLMN changes, sending notification information to the home domain policy control network element, where the notification information is used to notify that the VPLMN changes, and the notification information triggers the home domain policy control network element to send a third QoS parameter to the home domain session management network element, where the third QoS parameter includes a QoS parameter that is rejected by the first VPLMN in the second QoS parameter, and/or a QoS parameter that has a higher requirement than the QoS parameter that is rejected by the first VPLMN.

In a possible implementation method, the home domain session management network element is further configured to receive the third QoS parameter from the home domain policy control network element; and sending a second QoS rule to a visited domain session management network element belonging to a second VPLMN, wherein the second QoS rule comprises a second identifier of at least one second QoS flow and a fourth QoS parameter corresponding to the at least one second QoS flow, and the fourth QoS parameter is obtained according to the third QoS parameter.

In a possible implementation method, the first feedback information includes an identifier of a rejected QoS flow of the at least one first QoS flow, where the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the first VPLMN in the second QoS parameters; the home domain session management network element is configured to determine, according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected, and specifically includes: determining that some or all of the second QoS parameters are rejected based on the identity of the rejected QoS flow.

In a possible implementation method, the first feedback information includes an identification of an allowed QoS flow of the at least one first QoS flow, where the allowed QoS flow is a QoS flow corresponding to a QoS parameter allowed by the first VPLMN among the second QoS parameters; the home domain session management network element is configured to determine, according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected, and specifically includes: for determining that some or all of the second QoS parameters are rejected based on the identification of the allowed QoS flows.

In a possible implementation method, the first feedback information includes first indication information, where the first indication information is used to indicate that the first VPLMN cannot satisfy some or all of the QoS parameters in the second QoS parameters; the home domain session management network element is configured to determine, according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected, and specifically includes: the second QoS parameter determining unit is configured to determine that some or all of the second QoS parameters are rejected according to the first indication information.

In a possible implementation method, the home domain session management network element is further configured to send, according to the first feedback information, second feedback information to the home domain policy control network element, where the second feedback information includes at least one of an identifier of a rejected service data flow, an identifier of an allowed service data flow, and second indication information, the rejected service data flow corresponds to a rejected QoS parameter in the second QoS parameters, the allowed service data flow corresponds to an allowed QoS parameter in the second QoS parameters, and the second indication information is used to indicate that the first VPLMN cannot satisfy part or all of the QoS parameters in the first QoS parameters.

In the implementation methods of the first embodiment and the second embodiment, when some or all of the QoS parameters sent by the home domain policy control network element cannot be satisfied by the visited domain VPLMN, it is determined not to send the third QoS parameter. As another implementation scheme, the various implementation methods may be extended in that the home domain session management network element sends the QoS parameter to the visited domain session management network element, and if it is determined that part or all of the sent QoS parameter cannot be satisfied by the visited domain VPLMN, the home domain session management network element determines not to send the third QoS parameter. That is, the main judgment body for judging whether to send the third QoS parameter is extended from the home domain policy control network element to the home domain session management network element. Correspondingly, the home domain session management network element may also subscribe to itself or subscribe to a PLMN change event to other network elements, and after determining that the VPLMN is changed, the home domain session management network element sends the third QoS parameter to the new VPLMN.

The specific implementation of the above scheme will be described in detail in the following method embodiments, and will not be described herein again.

The system shown in fig. 1 may be used in the fifth generation (5th generation, 5G) network architecture shown in fig. 3, and of course, may also be used in a future network architecture, such as a sixth generation (6th generation, 6G) network architecture, and the like, which is not limited in this application.

To solve the problems mentioned in the background, the present application provides another communication system, as shown in fig. 2, which comprises a home domain data analysis network element and a home domain core network element.

In one embodiment:

the data analysis network element is used for receiving visited domain public land mobile network (VPLMN) information from a session management network element or at least one terminal device, wherein the VPLMN information comprises measurement parameters of a first VPLMN; determining a data analysis result of the first VPLMN according to the VPLMN information, wherein the data analysis result comprises one or more of the following information: the identifier of the first VPLMN, a service identifier, a first service experience, a session identifier, an identifier of the at least one terminal device, and a maximum supported quality of service QoS parameter; and sending the data analysis result to the core network element of the home domain. The home domain core network element is configured to receive the data analysis result from the data analysis network element; and judging whether to send a service establishment request to the first VPLMN according to the data analysis result, wherein the home domain core network element is a home domain policy control network element or a home domain session management network element.

In a possible implementation method, the data analysis network element is further configured to receive an analysis subscription request from the home domain core network element, where the analysis subscription request includes an identifier of the first VPLMN, and the analysis subscription request is used to subscribe to a data analysis result of the first VPLMN; the data analysis network element is configured to send the data analysis result to a core network element in a home domain, and specifically includes: and the analysis subscription notification is used for sending an analysis subscription notification to the core network element of the home domain, wherein the analysis subscription notification comprises the data analysis result.

In one possible implementation, the measurement parameters include one or more of the following information: the data transmission rate of the first VPLMN, the time delay of the first VPLMN, and the QoS parameters of the established QoS flows on the at least one terminal device.

In a possible implementation method, the at least one terminal device includes at least one local breakout LBO terminal device and at least one home domain roaming HR terminal device, and the VPLMN information includes LBO network information and HR network information; the data analysis network element is configured to determine a data analysis result of the first VPLMN according to the VPLMN information, and specifically includes: and the HR network information is determined according to the VPLMN information, and the data analysis result is determined according to the HR network information.

In a possible implementation method, the LBO network information further includes information of the LBO terminal device, and the HR network information further includes information of the HR terminal device; the data analysis network element is further configured to receive information of a first terminal device from the session management network element, where the first terminal device is an HR terminal device; and identifying the HR terminal equipment according to the information of the first terminal equipment and the information of the HR terminal equipment in the at least one terminal equipment.

In a possible implementation method, the service establishment request includes a first QoS parameter or a second service experience; the home domain core network element is configured to determine whether to send a service establishment request to the first VPLMN according to the data analysis result, and specifically includes: and the service establishment request is sent to the first VPLMN when the first VPLMN is determined to support the first QoS parameter or the second service experience according to the data analysis result.

In a possible implementation method, the service establishment request includes a first QoS parameter or a second service experience; the home domain core network element is configured to determine whether to send a service establishment request to the first VPLMN according to the data analysis result, and specifically includes: the service establishment request is sent to the first VPLMN according to the data analysis result, and the first QoS parameter or the second service experience is determined to be not supported by the first VPLMN; the home domain core network element is further configured to send a subscription request to a home domain session management network element, where the subscription request is used to subscribe to a PLMN change event; receiving notification information from the home domain session management network element, wherein the notification information is used for notifying a VPLMN that a change occurs; and determining to send the service establishment request to the second VPLMN according to the notification information.

In a possible implementation method, the data analysis network element may be a data analysis network element of a home domain or a data analysis network element of a visited domain.

The system shown in fig. 2 may be used in the 5G network architecture shown in fig. 3, and of course, may also be used in a future network architecture, such as a 6G network architecture, and the like, which is not limited in this application.

For example, it is assumed that the communication system shown in fig. 1 is applied to a 5G network architecture, and as shown in fig. 3, the communication system is a Roaming (Roaming) scenario diagram of a 5G Home-Route (HR). The network element or entity corresponding to the home domain session management network element in fig. 1 may be an H-SMF network element in the 5G network architecture shown in fig. 3, the network element or entity corresponding to the home domain policy control network element in fig. 1 may be an H-PCF network element in the 5G network architecture shown in fig. 3, and the network element or entity corresponding to the visited domain session management network element in fig. 1 may be a V-SMF network element in the 5G network architecture shown in fig. 3.

For example, it is assumed that the communication system shown in fig. 2 is applied to a 5G network architecture, and is a roaming scenario diagram of a 5G HR as shown in fig. 3. The network element or entity corresponding to the data analysis network element in fig. 2 may be an H-NWDAF network element in the 5G network architecture shown in fig. 3, and the network element or entity corresponding to the home domain core network element in fig. 2 may be an H-PCF network element or an H-SMF network element in the 5G network architecture shown in fig. 3.

The 5G network architecture shown in fig. 3 may include three parts, which are a terminal device part, a Data Network (DN) and an operator network part. The functions of some of the network elements will be briefly described below.

The operator network may include, but is not limited to, one or more of the following network elements: an AF Network element, a Network open Function (NEF) Network element (not shown in the drawings), a Policy Control Function (PCF) Network element, an Access and Mobility Management Function (AMF) Network element, an SMF Network element, a Radio Access Network (RAN) device, a User Plane Function (UPF) Network element, a Network Data analysis Function (NWDAF AF) Network element, and the like. In the operator network described above, the parts other than the radio access network part may be referred to as core network parts.

In a specific implementation, the terminal device in the embodiment of the present application may be a device for implementing a wireless communication function. The terminal device may be a User Equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, a terminal apparatus, or the like in a 5G network or a PLMN which is evolved in the future. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The terminal may be mobile or stationary.

The terminal device may establish a connection with the carrier network through an interface (e.g., N1, etc.) provided by the carrier network, and use data and/or voice services provided by the carrier network. The terminal device may also access the DN via an operator network, use operator services deployed on the DN, and/or services provided by a third party. The third party may be a service party other than the operator network and the terminal device, and may provide services such as other data and/or voice for the terminal device. The specific expression form of the third party may be determined according to an actual application scenario, and is not limited herein.

The RAN is a sub-network of the operator network and is an implementation system between the service node and the terminal device in the operator network. The terminal device is to access the operator network, first through the RAN, and then may be connected to a service node of the operator network through the RAN. The RAN device in this application is a device that provides a wireless communication function for a terminal device, and is also referred to as an access network device. RAN equipment in this application includes, but is not limited to: next generation base station (G node B, gNB), evolved node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved node B, or home node B, HNB), Base Band Unit (BBU), transmission point (TRP), Transmission Point (TP), mobile switching center, etc. in 5G.

The AMF network element mainly performs functions of mobility management, access authentication/authorization and the like. In addition, the method is also responsible for transferring the user policy between the UE and the PCF.

The SMF network element mainly performs functions such as session management, execution of control strategies issued by the PCF, selection of the UPF, and allocation of an Internet Protocol (IP) address of the UE.

The UPF network element is used as an interface UPF with a data network to complete functions of user plane data forwarding, session/stream level-based charging statistics, bandwidth limitation and the like.

The NEF network element is mainly used for supporting the opening of the capability and the event.

The AF network element mainly transfers the requirements of the application side on the network side, such as QoS requirements or user status event subscription. The AF may be a third party functional entity or an application service deployed by an operator. The AF network element may also become an application server, or a third party device, etc.

The PCF network element is mainly responsible for performing policy control functions such as charging, QoS bandwidth guarantee, mobility management, UE policy decision, etc. for the session and service stream levels.

An NWDAF Network element, configured to provide Network analysis information to Network Function (NF) Network elements, such as an AMF Network element, an SMF Network element, and a PCF Network element. The NWDAF network element may notify the subscribed NF of the network analysis information, or the NF network element may directly obtain specific network analysis information from the NWDAF network element.

The DN is a network outside the operator network, the operator network can access a plurality of DNs, and the DN can deploy a plurality of services and provide services such as data and/or voice for the terminal device. For example, the DN is a private network of a certain intelligent factory, a sensor installed in a workshop of the intelligent factory can be a terminal device, a control server of the sensor is deployed in the DN, and the control server can provide services for the sensor. The sensor can communicate with the control server, obtain the instruction of the control server, transmit the sensor data gathered to the control server, etc. according to the instruction. For another example, the DN is an internal office network of a company, the mobile phone or computer of the employee of the company may be a terminal device, and the mobile phone or computer of the employee may access information, data resources, and the like on the internal office network of the company.

It should be noted that, for different operators, the corresponding PLMNs are different. PLMNs are used to distinguish different mobile communication operators in one country or region. A service area may consist of one or several public land mobile networks. The PLMN is operated by a government or its approved operator to establish and operate a network for the public to provide land mobile services. A PLMN is represented by a Mobile country Code and a Mobile Network Code (MNC). Wherein, the MNC of China Mobile is 00, and the MNC of China Unicom is 01.

The embodiment of the application is suitable for a Home Routing (HR) roaming scene. The home domain roaming means that the PDU session of the terminal equipment is served by an SMF network element (i.e. H-SMF network element) of a home domain PLMN (homed PLMN, HPLMN), a UPF (i.e. H-UPF) of the HPLMN, an SMF (i.e. V-SMF) of a visited domain PLMN (VPLMN), and a UPF (i.e. V-UPF) of the VPLMN. The HPLMN refers to a PLMN to which the terminal device belongs or is subscribed, and the VPLMN refers to a PLMN to which the terminal device accesses.

It is to be understood that the above network elements or functions may be network elements in a hardware device, or may be software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform). Optionally, the network element or the function may be implemented by one device, or may be implemented by multiple devices together, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application.

The application function network element, the session management network element, the policy control network element, and the data analysis network element in this application may be an AF, an SMF (such as an H-SMF or a V-SMF), a PCF (such as an H-PCF or a V-PCF), and an NWDAF (such as an H-NWDAF) in fig. 3, respectively, or may be a network element having the functions of the AF, SMF, PCF, and NWDAF in a future communication such as a 6G network, which is not limited in this application. For convenience of description, the application function network element, the session management network element, the policy control network element, and the data analysis network element are respectively the AF, SMF, PCF, and NWDAF described above as examples.

To solve the problems mentioned in the background art, the present application provides a communication method based on the network architecture shown in fig. 3, as shown in fig. 4.

Wherein the following H-SMFs and H-PCFs are attributed to the HPLMN, and the following V-SMFs are attributed to the first VPLMN.

The method comprises the following steps:

in step 401, the AF sends a request message to the H-PCF. Accordingly, the H-PCF may receive the request message.

The request message contains QoS requirements including, but not limited to, one or more of the following information: uplink bandwidth, downlink bandwidth, time delay, packet loss rate and bit error rate.

Optionally, the AF sends the request message to the H-PCF via the NEF.

This step 401 is an optional step.

In step 402, the H-PCF generates policy information.

And the H-PCF generates strategy information according to the received QoS requirement. The policy information includes an identifier of at least one Service Data Flow (SDF) and a first QoS parameter corresponding to the at least one Service data flow, where the first QoS parameter includes, but is not limited to, one or more of the following information: a 5G QoS Identifier (5G QoS Identifier, 5QI), an Allocation and preemption Priority (ARP), an uplink bandwidth, a downlink bandwidth, a time delay, a packet loss rate, and an error rate.

For example, the policy information includes ((SDF ID1, QoS parameter 1), (SDF ID2, QoS parameter 2), (SDF ID3, QoS parameter 3)).

In step 403, the H-PCF sends policy information to the H-SMF. The policy information may be received by the corresponding H-SMF.

As an implementation method, the H-PCF may carry the policy information in the Npcf _ SMPolicyControl _ Create response in the session establishment procedure, and send the policy information to the H-SMF.

As an implementation method, the H-PCF may carry the policy information in the Npcf _ SMPolicyControl _ UpdateNotify request in the session modification procedure initiated by the PCF, and send the policy information to the H-SMF.

In step 404, the H-SMF generates a first QoS rule according to the policy information.

The first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter. The second QoS parameters include, but are not limited to, one or more of the following information: 5QI, ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

The QoS flow identifier may be expressed as a QoS Flow Identifier (QFI).

For example, the H-SMF merges the service data streams corresponding to the same or similar QoS parameters in the received policy information, and uses the same QoS streams for service provisioning. As an example, the policy information received by the H-SMF includes ((SDF ID1, QoS parameter 1), (SDF ID2, QoS parameter 2), (SDF ID3, QoS parameter 3)), and the H-SMF determines that QoS parameter 1 and QoS parameter 2 are the same or similar, and then the service data flow identified by SDF ID1 and the service data flow identified by SDF ID2 can be subjected to service provisioning using the same QoS flow, and the obtained first QoS rule includes ((QFI1, QoS parameter 4), (QFI2, QoS parameter 5)), where QoS parameter 4 is obtained according to QoS parameter 1 and QoS parameter 2, and QoS parameter 5 is the same or similar to QoS parameter 3.

At step 405, the H-SMF sends the first QoS rule to the V-SMF. Accordingly, the V-SMF may receive the first QoS rule.

As an implementation method, the H-SMF may carry the first QoS rule in the Nsmf _ pduse _ Create response in the session establishment procedure, and send the result to the V-SMF.

As an implementation method, the H-SMF can carry the first QoS rule in the Nsmf _ PDUSsion _ Update request in the session modification process initiated by the PCF and send the result to the V-SMF.

In step 406, the V-SMF determines that some or all of the second QoS parameters cannot be met according to the policy of the first VPLMN.

For example, the V-SMF determines that a portion of the delay requirement in the second QoS parameter cannot be met, or that a portion of the bandwidth requirement cannot be met, etc.

Step 407, the V-SMF sends the first feedback information to the H-SMF. Accordingly, the H-SMF may receive the first feedback information.

Wherein the first feedback information may include one or more of the following information:

1) and the rejected QoS flow in the at least one first QoS flow is the QoS flow corresponding to the QoS parameter rejected by the first VPLMN in the second QoS parameters.

In the embodiment of the present application, the identifier of the rejected QoS flow may also be understood as the identifier of the released QoS flow.

2) And the identification of the allowed QoS flow in the at least one first QoS flow, wherein the allowed QoS flow is the QoS flow corresponding to the QoS parameter allowed by the first VPLMN in the second QoS parameters.

3) And the first indication information is used for indicating that the first VPLMN can not meet part or all of the QoS parameters in the second QoS parameters.

Optionally, when the first feedback information includes the first indication information, but does not include the identifier of the rejected QoS flow and the identifier of the allowed QoS flow, the first feedback information may further include the QoS parameter rejected by the first VPLMN in the second QoS parameters and/or the QoS parameter allowed by the first VPLMN in the second QoS parameters.

This is explained below with reference to an example.

For example, the first QoS rule received by the V-SMF includes: ((QFI1, QoS parameter 4), (QFI2, QoS parameter 5)) V-SMF determines that QoS parameter 4 cannot be met (such as cannot meet bandwidth therein, or delay therein, etc.) but QoS parameter 5 can be met according to the policy of the first VPLMN, then first feedback information can be sent to H-SMF, where the first feedback information can be, for example, but not limited to, any of the following:

1) identification of the rejected QoS flow, i.e. QFI-1.

2) Identification of allowed QoS flows, i.e. QFI-2.

3) First indication information and rejected QoS parameters (i.e., QoS parameters 4).

4) First indication information and allowed QoS parameters (i.e., QoS parameters 5).

5) An identification of the rejected QoS flow (i.e., QFI-1), and an identification of the allowed QoS flow (i.e., QFI-2).

6) First indication information and an identification of the rejected QoS flow (i.e., QFI-1).

7) First indication information and identification of allowed QoS flows (i.e., QFI-2).

As an implementation method, the V-SMF can carry the first feedback information in an Nsmf _ PDUSESSion _ Update Request or an Nsmf _ PDUSESSion _ Update Response and send the first feedback information to the H-SMF.

And step 408, the H-SMF sends the second feedback information to the H-PCF. Accordingly, the H-PCF may receive the second feedback information.

And the second feedback information is generated by the H-SMF according to the first feedback information.

Wherein the second feedback information comprises one or more of the following information:

1) and the rejected service data flow in the at least one service data flow is the service data flow corresponding to the QoS parameter rejected by the first VPLMN in the first QoS parameter.

The "at least one service data flow" refers to at least one service data flow corresponding to the policy information of step 402.

2) And the allowed service data flow in the at least one service data flow is the service data flow corresponding to the QoS parameter allowed by the first VPLMN in the first QoS parameter.

3) And second indication information, wherein the second indication information is used for indicating that the first VPLMN can not meet part or all of the QoS parameters in the second QoS parameters.

Optionally, when the second feedback information includes the second indication information, but does not include the identifier of the rejected service data flow and the identifier of the allowed service data flow, the second feedback information may further include the QoS parameter rejected by the first VPLMN in the first QoS parameters and/or the QoS parameter allowed by the first VPLMN in the first QoS parameters.

This is explained below with reference to an example.

For example, the first feedback information is any one of 1) to 7 described in the above example, and the second feedback information may be, but is not limited to, any one of the following:

1) identification of the rejected traffic data stream, i.e. SDF ID1 and SDF ID 2.

2) Identification of allowed service data flows, i.e., SDF ID 3.

3) The second indication information, and the rejected QoS parameters (i.e., QoS parameter 1 and QoS parameter 2) of the first QoS parameters.

4) The second indication information, and the allowed QoS parameter (i.e., QoS parameter 3) of the first QoS parameters.

5) An identification of the rejected service data flow (i.e., SDF ID1 and SDF ID2), and an identification of the allowed service data flow (i.e., SDF ID 3).

6) Second indication information and identification of the rejected traffic data stream (i.e., SDF ID1 and SDF ID 2).

7) Second indication information and identification of allowed service data flows (i.e., SDF ID 3).

As an implementation method, the H-SMF may carry the second feedback information in an Npcf _ SMPolicyControl _ Update request and send the result to the H-PCF.

In step 409, the H-PCF determines not to send the third QoS parameter to the H-SMF before the VPLMN change.

It should be noted that the H-PCF not sending the third QoS parameter to the H-SMF means that the H-PCF does not send the third QoS parameter to the H-SMF for the rejected (or released) traffic data flow.

And after receiving the second feedback information, the H-PCF determines that part or all of the first QoS parameters are rejected, and then determines not to send third QoS parameters to the H-SMF before the VPLMN is changed, wherein the third QoS parameters comprise QoS parameters with higher requirements than the QoS parameters rejected by the first VPLMN and/or the QoS parameters rejected by the first VPLMN in the first QoS parameters. This is because if the VPLMN is not changed, the H-PCF will reject the fourth QoS parameter if it sends the third QoS parameter to the H-SMF, which then gets the fourth QoS parameter from the third QoS parameter and sends the fourth QoS parameter to the V-SMF. Thus, to avoid unnecessary signaling overhead, the H-PCF determines not to send the third QoS parameter to the H-SMF before the VPLMN change.

As another implementation method, after the H-PCF receives the second feedback information, the H-PCF determines that part or all of the first QoS parameters are rejected, and then determines not to send the third QoS parameters to the H-SMF. That is, the H-PCF decides not to send the third QoS parameter to the H-SMF, regardless of whether the VPLMN changes. Based on the implementation method, the following steps 410 to 413 and other steps are not required to be performed. I.e. after step 409 the flow ends.

The method for the H-PCF to determine not to send the third QoS parameter to the H-SMF (or determine not to send the third QoS parameter to the H-SMF before the VPLMN change) according to the second feedback information includes, but is not limited to:

in the method 1, if the second feedback information includes the identifier of the rejected service data stream in the at least one service data stream, the H-PCF determines not to send the third QoS parameter to the H-SMF according to the identifier of the rejected service data stream (or determines not to send the third QoS parameter to the H-SMF before the VPLMN is changed).

And 2, if the second feedback information contains the identifier of the allowed service data flow in at least one service data flow, the H-PCF determines not to send the third QoS parameter to the H-SMF according to the identifier of the allowed service data flow (or determines not to send the third QoS parameter to the H-SMF before the VPLMN is changed).

For example, if the H-PCF determines that the identities of the allowed traffic data flows in the second feedback information are less than the identities of the traffic data flows sent by the H-PCF to the H-SMF, then it determines that a portion of the traffic data flows are rejected, and therefore determines not to send the third QoS parameters to the H-SMF (or determines not to send the third QoS parameters to the H-SMF before the VPLMN change).

And 3, if the second feedback information comprises the second indication information and comprises the rejected QoS parameters in the first QoS parameters and/or the allowed QoS parameters in the first QoS parameters, the H-PCF determines not to send the third QoS parameters to the H-SMF according to the second indication information and the rejected QoS parameters in the first QoS parameters and/or the allowed QoS parameters in the first QoS parameters (or determines not to send the third QoS parameters to the H-SMF before the VPLMN is changed).

At step 410, the H-PCF sends a subscription request to the H-SMF. Accordingly, the H-SMF may receive a subscription request.

The subscription request is for subscribing to a PLMN change event. That is, when the PLMN changes, the H-SMF needs to report the PLMN change event to the H-PCF based on the subscription of the H-PCF.

As an implementation method, the H-PCF sends a policy control request trigger to the H-SMF through the Npcf _ SMPolicyControl _ Update response, wherein the policy control request trigger is PLMN change.

In step 411, the H-SMF monitors for VPLMN changes.

The H-SMF starts monitoring whether the PLMN has changed according to the subscription request of the H-PCF in step 410.

At step 412, the H-SMF sends a notification message to the H-PCF. The corresponding H-PCF may receive the notification information.

And when the H-SMF monitors that the PLMN change event occurs, the H-SMF sends notification information to the H-PCF for notifying that the VPLMN changes. Optionally, the notification information may carry an identifier of the changed PLMN (referred to as an identifier of the second VPLMN in this embodiment of the application).

In step 413, the H-PCF determines to send the third QoS parameter.

Since the VPLMN is changed, the QoS parameters not allowed by the PLMN before the change (i.e., the first VPLMN) may be allowed in the changed PLMN (i.e., the second VPLMN), and thus the H-PCF may re-send the third QoS parameters to the changed PLMN through the H-SMF.

For example, after step 413, the H-PCF sends the third QoS parameter to the H-SMF, and then the H-SMF sends the second QoS rule to the V-SMF belonging to the second VPLMN (in this embodiment, this V-SMF is referred to as V-SMF1), where the second QoS rule includes the second identifier of the at least one second QoS flow and the fourth QoS parameter corresponding to the at least one second QoS flow, and the fourth QoS parameter is obtained according to the third QoS parameter. V-SMF1 then determines whether to allow the fourth QoS parameter based on the policy of the second VPLMN. The subsequent process is similar to the implementation method of steps 406 to 413 described above in this embodiment, and is not described again.

Based on the scheme, under the home domain roaming scene, the HPLMN can determine not to send the QoS request to the VPLMN according to the received feedback information, so that the signaling waste caused by the HPLMN frequently sending the QoS request to the VPLMN is avoided, and the signaling overhead can be saved.

As an alternative implementation, the above steps 408 to 413 may be replaced by the following steps 408 'to 413'.

Step 408', the H-SMF sends second feedback information to the AF. Accordingly, the AF may receive the second feedback information.

In step 409', the AF determines that QoS requirements are not sent to the H-PCF before the VPLMN change.

The QoS requirement here includes a rejected QoS parameter of the first QoS parameters or a QoS parameter having a higher requirement than the rejected QoS parameter.

Specifically, the AF may determine, according to the second feedback information, that no QoS requirement is sent to the H-PCF before the VPLMN is changed.

At step 410', the AF sends a subscription request to the H-SMF. Accordingly, the H-SMF may receive a subscription request.

The subscription request is for subscribing to a PLMN change event. That is, when the VPLMN changes, the H-SMF needs to report the PLMN change event to the AF based on the subscription of the AF.

In step 411', the H-SMF monitors for VPLMN changes.

The H-SMF starts monitoring whether the PLMN has changed according to the subscription request of the H-PCF in step 410'.

In step 412', the H-SMF sends notification information to the AF. Accordingly, the AF can receive the notification information.

And when the H-SMF monitors that the PLMN change event occurs, sending notification information to the AF for notifying that the VPLMN changes. Optionally, the notification information may carry the identifier of the changed PLMN.

In step 413', the AF determines to resend the QoS requirements to the H-PCF.

Since the VPLMN changes, the QoS parameters not allowed by the PLMN before the change may be allowed in the changed PLMN, and therefore, the AF may re-send the QoS requirement to the H-PCF, thereby triggering the H-PCF to re-initiate the QoS request.

As another alternative implementation, the above steps 408 to 413 may be replaced by the following steps 408 "to 416".

Step 408 ", the H-SMF sends the second feedback information to the H-PCF. Accordingly, the H-PCF may receive the second feedback information.

Step 409 ", the H-PCF sends the second feedback information to the AF. Accordingly, the AF may receive the second feedback information.

Step 410 ", the AF determines that QoS requirements are not sent to the H-PCF before the VPLMN change.

Step 411 ", the AF sends a subscription request to the H-PCF. Accordingly, the H-PCF may receive the subscription request.

The subscription request is for subscribing to a PLMN change event. That is, when the VPLMN changes, the H-PCF needs to report the PLMN change event to the AF based on the subscription of the AF.

Step 412 ", the H-PCF sends a subscription request to the H-SMF. Accordingly, the H-SMF may receive a subscription request.

The subscription request is for subscribing to a PLMN change event. That is, when the VPLMN changes, the H-SMF needs to report the PLMN change event to the H-PCF based on the subscription of the H-PCF.

Step 413 ", H-SMF monitors VPLMN change.

The H-SMF starts monitoring whether the PLMN has changed according to the subscription request of the H-PCF in step 412 ".

Step 414 ", the H-SMF sends a notification message to the H-PCF. Accordingly, the H-PCF may receive the notification information.

And when the H-SMF monitors that the PLMN change event occurs, the H-SMF sends notification information to the H-PCF for notifying that the VPLMN changes. Optionally, the notification information may carry the identifier of the changed PLMN.

Step 415 ", the H-PCF sends a notification message to the AF. Accordingly, the AF can receive the notification information.

And when the H-PCF receives the notification information from the H-SMF, the H-PCF sends the notification information to the AF for notifying the change of the VPLMN. Optionally, the notification information may carry the identifier of the changed PLMN.

Step 416 ", the AF determines to send the QoS requirements to the H-PCF.

To solve the problems mentioned in the background art, the present application provides another communication method based on the network architecture shown in fig. 3, as shown in fig. 5. The main differences between the method and the embodiment corresponding to fig. 4 are as follows: in the embodiment corresponding to fig. 4, the H-PCF actively subscribes to the H-SMF for the PLMN change event, whereas in the embodiment corresponding to fig. 5, the H-SMF does not receive the subscription of the H-PCF, but actively reports to the H-PCF that the VPLMN is changed after monitoring that the VPLMN is changed.

The method comprises the following steps:

steps 501 to 509 are the same as steps 401 to 409 in the embodiment of fig. 4.

In step 510, the H-SMF monitors for a VPLMN change.

The H-SMF may determine that some or all QoS parameters in the second QoS parameters are rejected according to the first feedback information received in step 507, then start to monitor whether the PLMN changes, and after the VPLMN changes, actively send notification information to the H-PCF, where the notification information is used to notify that the VPLMN changes, where the notification information triggers the H-PCF to send a third QoS parameter to the H-SMF, where the third QoS parameter includes a QoS parameter rejected by the first VPLMN in the second QoS parameters, and/or a QoS parameter with a higher requirement than the QoS parameter rejected by the first VPLMN.

Steps 511 to 512 are the same as steps 412 to 413 of the embodiment of fig. 4.

In the embodiment corresponding to fig. 4, an execution operation of the AF may be introduced, and the AF does not send the QoS requirement to the H-PCF before determining that the VPLMN changes, so as to avoid unnecessary signaling overhead, specifically, refer to the descriptions of step 408 'to step 413', and step 408 "to step 416". In the embodiment corresponding to fig. 5, an AF execution operation may also be introduced, and the AF does not send QoS requirements to the H-PCF before determining the VPLMN change, so as to avoid unnecessary signaling overhead, but the main difference from the above steps 408 'to 413', or steps 408 "to 416" is that: the AF or the H-PCF does not need to subscribe the PLMN change event to the H-SMF, but the H-SMF actively reports the change of the VPLMN to the AF or the H-PCF after monitoring the change of the VPLMN.

To solve the problems mentioned in the background art, the present application provides another communication method based on the network architecture shown in fig. 3, as shown in fig. 6. The method is that NWDAF determines the data analysis result of VPLMN based on the roaming network information (also called VPLMN information) reported by terminal equipment or a session management network element, and then sends the data analysis result to a home domain core network element (which can be H-SMF or H-PCF), and the home domain core network element decides whether to initiate a service establishment request to the VPLMN according to the data analysis result, so as to avoid extra signaling overhead caused by unnecessary service establishment requests. Wherein the NWDAF may be a home domain NWDAF (i.e., H-NWDAF) or a visited domain NWDAF (i.e., V-NWDAF).

In the following embodiments, an NWDAF is taken as an H-NWDAF, a core network element of a home domain is taken as an H-PCF, and an implementation method of the core network element of the home domain is taken as an H-SMF, which is similar and will not be described again.

The method comprises the following steps:

in step 601, the terminal device (which may be one or more) in the first VPLMN sends a session establishment request to the V-SMF, carrying information of the terminal device (such as an identifier (UE ID) of the terminal device and a session identifier). Accordingly, the V-SMF may receive the session establishment request.

The terminal device herein is not limited to a specific terminal device, and may be any terminal device.

The session establishment request may be, for example, a PDU session establishment request.

Step 602, the V-SMF sends a request for creating a context to the H-SMF, carrying the information of the terminal device. Accordingly, the H-SMF may receive the create context request.

And step 603, the H-SMF sends an event notification to the H-NWDAF, and carries the information of the terminal equipment. Accordingly, the H-NWDAF may receive the event notification.

For example, the H-SMF may send an Nsmf _ EventExposure _ Notify to the H-NWDAF, where the Nsmf _ EventExposure _ Notify carries the identifier of the terminal device and the PDU session identifier.

And step 604, the H-NWDAF saves the information of the terminal equipment.

In this step, the H-NWDAF may save information of the terminal device at the VPLMN. In particular, VPLMN herein refers to a Home-Routed Roaming (HR) Roaming network. That is, the information of the terminal device stored in the H-NWDAF is information of the terminal device in the HR roaming network.

The steps 601 to 604 are optional steps.

Step 605, the terminal device obtains the VPLMN information.

The VPLMN information includes measurement parameters and optionally also the identity of the terminal device and the PDU session identity. The measurement parameters include one or more of the following information: the data transmission rate of the first VPLMN is dynamically measured, the time delay of the first VPLMN is dynamically measured (such as air interface time delay, time delay from the terminal device to the AF, and the like), and the QoS parameters of the QoS flow already established on the terminal device (such as maximum bandwidth, ARP, 5QI, time delay, and the like).

Step 606, the terminal device sends VPLMN information to the H-NWDAF. Accordingly, the H-NWDAF may receive the VPLMN information.

It should be noted that the step may be performed by a plurality of terminal devices in the first VPLMN, that is, the H-NWDAF may receive the reported VPLMN information from the plurality of terminal devices, respectively.

And step 607, the H-NWDAF determines the data analysis result of the first VPLMN according to the information of the VPLMN.

For example, the H-NWDAF may determine the data analysis result of the first VPLMN according to one or more of the number of terminal devices reporting VPLMN information, the number of PDU sessions of the terminal devices, and measurement parameters. The data analysis results contain one or more of the following information: an identity of the first VPLMN, a service identity, a first service experience, a session identity (which may be for example a PDU session identity), an identity of the at least one terminal device, a maximum supported QoS parameter.

For example, the data analysis result may include a QoS parameter that is maximally supported by the first VPLMN for one or more terminal devices, and/or include a QoS parameter that is maximally supported by the first VPLMN for one or more services, and/or include a QoS parameter that is maximally supported by the first VPLMN for one or more sessions, and/or include a service experience of the first VPLMN for one or more services, and the like.

The VPLMN information here includes not only LBO network information reported by Local Breakout (LBO) terminal equipment, but also HR network information reported by HR terminal equipment. As an implementation method, in this step 607, the H-NWDAF may determine the data analysis result of the VPLMN only according to the HR network information reported by the HR terminal device. Based on the implementation method, the H-NWDAF needs to identify HR network information from the received VPLMN information first. For example, the LBO network information reported by the LBO terminal device further includes information of the LBO terminal device (for example, the identifier and the session identifier of the HR terminal device), and the HR network information reported by the HR terminal device further includes information of the HR terminal device (for example, the identifier and the session identifier of the HR terminal device), so that the H-NWDAF may identify the HR network information from the received VPLMN information according to the information of the terminal device in the HR roaming network stored in step 604.

As an example, the above step 604 saves information of UE1, UE2, and UE3, wherein UE1, UE2, and UE3 are all in HR roaming network. The VPLMN information in step 606 includes ((information of UE1, VPLMN information 1 reported by UE 1), (information of UE2, information of VPLMN 2 reported by UE 2), (information of UE4, VPLMN information 3 reported by UE 4), (information of UE5, and VPLMN information 4 reported by UE 5)), and then the H-NWDAF identifies that VPLMN information 1 and VPLMN information 2 in the reported VPLMN information are HR network information, and VPLMN information 3 and VPLMN information 4 are LBO network information, according to the information of UE1, the information of UE2, and the information of UE3 stored in step 604.

As an example, after the H-NWDAF receives the VPLMN information in step 606, a query request may be sent to the H-SMF to identify HR network information. Specifically, the query request includes the identifier of the terminal device in the VPLMN information, and optionally, also includes a session identifier. And the H-SMF determines HR network information according to the context information stored in the session establishment process. The context information refers to the identification session identification of the terminal equipment stored by the H-SMF. If the context information stored in the H-SMF includes the identification of the terminal device and the session identification in the query request, the terminal device and the session can be determined to be HR network information.

Step 608, the H-PCF sends an analyze subscribe request to the H-NWDAF, carrying the identity of the first VPLMN (VPLMN ID). Accordingly, the H-NWDAF may receive the analysis subscription request.

The identity of the first VPLMN here refers to the identity of the HR roaming network.

The analysis subscription request is used for subscribing the data analysis result of the first VPLMN.

For example, the analysis subscription request may be nwdaf _ analytics subscription _ describe.

And step 609, the H-NWDAF sends an analysis subscription notification to the mobile terminal, wherein the analysis subscription notification carries the data analysis result of the first VPLMN. Accordingly, the H-PCF may receive the analysis subscription notification.

For example, the analysis subscription notification may be nwdaf _ analytics subscription _ Notify.

Step 610, the H-PCF determines whether to send a service establishment request to the first VPLMN according to the data analysis result.

For example, the service establishment request here contains the first QoS parameter or the second service experience.

And when the H-PCF determines that the first VPLMN supports the first QoS parameter or the second service experience according to the data analysis result, the H-PCF determines to send a service establishment request to the first VPLMN. And when the H-PCF determines that the first VPLMN does not support the first QoS parameter or the second service experience according to the data analysis result, the H-PCF determines not to send the service establishment request to the first VPLMN. Wherein the first QoS parameter comprises one or more of the following information: 5QI, ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

Optionally, the H-CPF may send a subscription request to the H-SMF, where the subscription request is used to subscribe to a PLMN change event, and when the H-CPF receives notification information from the H-SMF, where the notification information is used to notify that the VPLMN is changed, the H-CPF determines to send a service establishment request to the second VPLMN according to the notification information, where the service establishment request includes the first QoS parameter or the second service experience. Since the VPLMN is changed, the service establishment request that is not allowed by the PLMN before the change (i.e., the first VPLMN) may be allowed in the changed PLMN (i.e., the second VPLMN), and thus the H-PCF may resend the service establishment request to the changed PLMN through the H-SMF.

Based on the scheme, under the home domain roaming scene, the HPLMN can determine the data analysis result of the VPLMN, and then judge whether to send the service establishment request to the VPLMN according to the data analysis result of the VPLMN, so that the signaling overhead waste caused by the fact that the HPLMN frequently sends the service establishment request to the VPLMN is avoided, and the signaling overhead can be saved.

The above-mentioned scheme provided by the present application is mainly introduced from the perspective of interaction between network elements. It is to be understood that the above-described implementation of each network element includes, in order to implement the above-described functions, a corresponding hardware structure and/or software module for performing each function. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is to be understood that, in the foregoing embodiments of the methods, the steps or operations implemented by the access network device may also be implemented by a component (e.g., a chip or a circuit) configured in the access network device, the steps or operations implemented by the user plane network element may also be implemented by a component (e.g., a chip or a circuit) configured in the user plane network element.

Fig. 7 is a schematic diagram of a communication device according to an embodiment of the present application. The apparatus is configured to implement the steps executed by the corresponding home domain policy control network element (i.e., H-PCF), home domain session management network element (i.e., H-SMF), visited domain session management network element (i.e., V-SMF), home domain data analysis network element (i.e., H-NWDAF), or home domain core network element (e.g., H-PCF or H-SMF) in the embodiments of fig. 4 to fig. 6, as shown in fig. 8, the apparatus 700 includes a transceiving unit 710 and a processing unit 720.

In a first embodiment:

a transceiving unit 710, configured to send policy information to a home domain session management network element, where the policy information includes an identifier of at least one service data flow and a first quality of service QoS parameter corresponding to the at least one service data flow; receiving feedback information from the home domain session management network element; a processing unit 720, configured to determine not to send, to the home domain session management network element, a QoS parameter that is more required than a QoS parameter rejected by a visited domain public land mobile network VPLMN and/or a QoS parameter rejected by the VPLMN in the first QoS parameter, according to the feedback information.

In a possible implementation method, the feedback information includes an identifier of a rejected service data flow in the at least one service data flow, where the rejected service data flow is a service data flow corresponding to a QoS parameter rejected by the VPLMN in the first QoS parameter; the processing unit 720 is configured to determine, according to the feedback information, not to send, to the home domain session management network element, a QoS parameter that requires a higher requirement than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and determining not to send the QoS parameters with higher requirements than those rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the identifier of the rejected service data flow.

In a possible implementation method, the feedback information includes an identifier of an allowed service data flow in the at least one service data flow, where the allowed service data flow is a service data flow corresponding to a QoS parameter allowed by the VPLMN in the first QoS parameter; the processing unit 720 is configured to determine, according to the feedback information, not to send, to the home domain session management network element, a QoS parameter that requires a higher requirement than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and the QoS parameter refused by the VPLMN is determined not to be sent to the home domain session management network element according to the identifier of the allowed service data flow, where the QoS parameter is more required than the QoS parameter refused by the VPLMN and/or the QoS parameter refused by the VPLMN in the first QoS parameters.

In a possible implementation method, the feedback information includes indication information, where the indication information is used to indicate that the VPLMN cannot satisfy some or all of the QoS parameters in the first QoS parameter; the processing unit 720 is configured to determine, according to the feedback information, not to send, to the home domain session management network element, a QoS parameter that requires a higher requirement than a QoS parameter that is rejected by a VPLMN and/or a QoS parameter that is rejected by the VPLMN in the first QoS parameter, and specifically includes: and the QoS parameter refused by the VPLMN is determined not to be sent to the home domain session management network element according to the indication information.

In a possible implementation method, the processing unit 720 is configured to determine, according to the feedback information, not to send, to the home domain session management network element, a QoS parameter that requires higher QoS than a QoS parameter rejected by a VPLMN and/or a QoS parameter rejected by the VPLMN in the first QoS parameter, and specifically includes: and determining not to send the QoS parameters with higher requirements than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element before the VPLMN is changed according to the feedback information.

In a possible implementation method, the transceiving unit 710 is further configured to receive notification information from the home domain session management network element, where the notification information is used to notify a VPLMN that a change occurs; the processing unit 720 is further configured to determine, according to the notification information, to send the QoS parameter with a higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element.

In a possible implementation method, the transceiver unit 710 is further configured to send a subscription request to the home domain session management network element, where the subscription request is used to subscribe to a PLMN change event.

In a second embodiment:

a transceiving unit 710, configured to receive a first quality of service QoS parameter corresponding to a service data stream from a home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; and after monitoring that the VPLMN changes, sending notification information to a home domain policy control network element, where the notification information is used to notify that the VPLMN changes, and the notification information triggers the home domain policy control network element to send a third QoS parameter to a home domain session management network element, where the third QoS parameter includes a QoS parameter that is rejected by the first VPLMN in the second QoS parameter, and/or a QoS parameter that has a higher requirement than the QoS parameter that is rejected by the first VPLMN. A processing unit 720, configured to determine that some or all of the second QoS parameters are rejected according to the first feedback information; monitoring whether the VPLMN is changed.

In a possible implementation method, the transceiver unit 710 is further configured to receive the third QoS parameter from the home domain policy control network element; and sending a second QoS rule to a visited domain session management network element belonging to a second VPLMN, wherein the second QoS rule comprises a second identifier of at least one second QoS flow and a fourth QoS parameter corresponding to the at least one second QoS flow, and the fourth QoS parameter is obtained according to the third QoS parameter.

In a possible implementation method, the first feedback information includes an identifier of a rejected QoS flow of the at least one first QoS flow, where the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the first VPLMN in the second QoS parameters; the processing unit 720 is configured to determine, according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected, and specifically includes: determining that some or all of the second QoS parameters are rejected based on the identity of the rejected QoS flow.

In a possible implementation method, the first feedback information includes an identification of an allowed QoS flow of the at least one first QoS flow, where the allowed QoS flow is a QoS flow corresponding to a QoS parameter allowed by the first VPLMN among the second QoS parameters; the processing unit 720 is configured to determine, according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected, and specifically includes: determining that some or all of the second QoS parameters are rejected based on the identification of the allowed QoS flows.

In a possible implementation method, the first feedback information includes first indication information, where the first indication information is used to indicate that the first VPLMN cannot satisfy some or all of the QoS parameters in the second QoS parameters; the processing unit 720 is configured to determine, according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected, and specifically includes: and determining that part or all of the second QoS parameters are rejected according to the first indication information.

In a possible implementation method, the processing unit 720 is further configured to send, according to the first feedback information, second feedback information to the home domain policy control network element, where the second feedback information includes at least one of an identifier of a rejected traffic data flow, an identifier of an allowed traffic data flow, and second indication information, the rejected traffic data flow corresponds to a rejected QoS parameter in the second QoS parameters, the allowed traffic data flow corresponds to an allowed QoS parameter in the second QoS parameters, and the second indication information is used to indicate that the first VPLMN cannot satisfy part or all of the QoS parameters in the first QoS parameters.

In a third embodiment:

a transceiving unit 710, configured to receive a quality of service QoS rule from a home domain session management network element, where the QoS rule includes an identifier of at least one quality of service QoS flow and a QoS parameter corresponding to the at least one QoS flow; and sending indication information to the home domain session management network element, wherein the indication information is used for indicating that the VPLMN cannot meet part or all of the QoS parameters contained in the QoS rule. A processing unit 720, configured to determine, according to a policy of a visited public land mobile network VPLMN, that some or all QoS parameters in the QoS parameters cannot be met.

In a possible implementation method, the transceiving unit 710 is further configured to send, to the home domain session management network element, an identifier of a rejected QoS flow in the at least one QoS flow, where the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the VPLMN in QoS parameters included in the QoS rule; and/or sending, to the home domain session management network element, an identification of an allowed QoS flow of the at least one QoS flow, where the allowed QoS flow is a QoS flow corresponding to a QoS parameter allowed by the VPLMN among QoS parameters included in the QoS rule.

In a possible implementation method, the transceiving unit 710 is further configured to send, to the home domain session management network element, a QoS parameter rejected by the VPLMN among QoS parameters included in the QoS rule; and/or sending the QoS parameters allowed by the VPLMN in the QoS parameters contained in the QoS rules to the home domain session management network element.

In a fourth embodiment:

a transceiving unit 710, configured to receive visited-domain public land mobile network VPLMN information from a session management network element or at least one terminal device, where the VPLMN information includes measurement parameters of a VPLMN; and sending a data analysis result of the VPLMN to a home domain core network element, wherein the data analysis result is used for judging whether to send a service establishment request to the VPLMN or not by the home domain core network element, and the home domain core network element is a home domain policy control network element or a home domain session management network element. A processing unit 720, configured to determine a data analysis result of the VPLMN according to the VPLMN information, where the data analysis result includes one or more of the following information: the identifier of the VPLMN, the service identifier, the service experience, the session identifier, the identifier of the at least one terminal device, and the maximum supported QoS parameter.

In a possible implementation method, the transceiving unit 710 is further configured to receive an analysis subscription request from a network element of the core network of the home domain, where the analysis subscription request includes an identifier of the VPLMN, and the analysis subscription request is used to subscribe to a data analysis result of the VPLMN; the transceiving unit 710 is configured to send the data analysis result to a core network element in a home domain, and specifically includes: and the analysis subscription notification is used for sending an analysis subscription notification to the core network element of the home domain, wherein the analysis subscription notification comprises the data analysis result.

In a possible implementation method, the at least one terminal device includes at least one local breakout LBO terminal device and at least one home domain roaming HR terminal device, and the VPLMN information includes LBO network information and HR network information; the processing unit 720 is configured to determine a data analysis result of the VPLMN according to the VPLMN information, and specifically includes: and the HR network information is determined according to the VPLMN information, and the data analysis result is determined according to the HR network information.

In a possible implementation method, the LBO network information further includes information of the LBO terminal device, and the HR network information further includes information of the HR terminal device; the transceiver 710 is further configured to receive information of a first terminal device from a session management network element, where the first terminal device is an HR terminal device; the processing unit 720 is further configured to identify an HR terminal device of the at least one terminal device according to the information of the first terminal device and the information of the HR terminal device.

In a fifth embodiment:

a transceiving unit 710, configured to receive a data analysis result of the first visited domain public land mobile network VPLMN from the home domain data analysis network element, where the data analysis result includes one or more of the following information: the identifier of the first VPLMN, the service identifier, the first service experience, the session identifier, the identifier of at least one terminal device, and the maximum supported quality of service (QoS) parameter; a processing unit 720, configured to determine, according to the data analysis result, whether to send a service establishment request to the first VPLMN.

In a possible implementation method, the service establishment request includes a first QoS parameter or a second service experience; the processing unit 720 is configured to determine, according to the data analysis result, whether to send a service establishment request to the first VPLMN, and specifically includes: and the service establishment request is sent to the first VPLMN when the first VPLMN is determined to support the first QoS parameter or the second service experience according to the data analysis result.

In a possible implementation method, the service establishment request includes a first QoS parameter or a second service experience; the processing unit 720 is configured to determine, according to the data analysis result, whether to send a service establishment request to the first VPLMN, and specifically includes: the service establishment request is sent to the first VPLMN according to the data analysis result, and the first QoS parameter or the second service experience is determined to be not supported by the first VPLMN; the transceiver 710 is further configured to send a subscription request to a home domain session management network element, where the subscription request is used to subscribe to a PLMN change event; receiving notification information from the home domain session management network element, wherein the notification information is used for notifying a VPLMN that a change occurs; the processing unit 720 is further configured to determine, according to the notification information, to send the service establishment request to the second VPLMN.

Optionally, the communication device 700 may further include a storage unit, which is used for storing data or instructions (also referred to as codes or programs), and the above units may interact with or be coupled to the storage unit to implement corresponding methods or functions. For example, the processing unit 720 may read data or instructions in the storage unit, so that the communication device implements the method in the above-described embodiments.

It should be understood that the division of the units in the above apparatus is only a division of logical functions, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And the units in the device can be realized in the form of software called by the processing element; or may be implemented entirely in hardware; part of the units can also be realized in the form of software called by a processing element, and part of the units can be realized in the form of hardware. For example, each unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory in the form of a program, and a function of the unit may be called and executed by a processing element of the apparatus. In addition, all or part of the units can be integrated together or can be independently realized. The processing element described herein may in turn be a processor, which may be an integrated circuit having signal processing capabilities. In the implementation process, the steps of the method or the units above may be implemented by integrated logic circuits of hardware in a processor element or in a form called by software through the processor element.

In one example, the units in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), or a combination of at least two of these Integrated Circuit formats. As another example, when a Unit in a device may be implemented in the form of a Processing element scheduler, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of invoking programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above transceiving unit 710 is an interface circuit of the apparatus for transmitting and receiving signals to and from other apparatuses. For example, when the device is implemented in the form of a chip, the transceiver unit 710 is an interface circuit used by the chip to transmit signals to or receive signals from other chips or devices.

Referring to fig. 8, a schematic diagram of a communication apparatus provided in this embodiment of the present application is used to implement operations of a home domain policy control network element (i.e., H-PCF), a home domain session management network element (i.e., H-SMF), a visited domain session management network element (i.e., V-SMF), a home domain data analysis network element (i.e., H-NWDAF), or a home domain core network element (e.g., H-PCF or H-SMF) in the foregoing embodiments. As shown in fig. 8, the communication apparatus includes: a processor 810 and an interface 830. optionally, the communication device also includes a memory 820. The interface 830 is used to enable communication with other devices.

The method executed by the home domain policy control network element (i.e., H-PCF), the home domain session management network element (i.e., H-SMF), the visited domain session management network element (i.e., V-SMF), the home domain data analysis network element (i.e., H-nwdf), or the home domain core network element (e.g., H-PCF or H-SMF) in the above embodiments may be implemented by the processor 810 calling a program stored in the memory (which may be the memory 820 in the home domain policy control network element (i.e., H-PCF), the home domain session management network element (i.e., H-SMF), the visited domain session management network element (i.e., V-SMF), the home domain data analysis network element (i.e., H-NWDAF), or the home domain core network element (e.g., H-PCF or H-SMF), or may be an external memory). That is, the home domain policy control network element (i.e., H-PCF), the home domain session management network element (i.e., H-SMF), the visited domain session management network element (i.e., V-SMF), the home domain data analysis network element (i.e., H-NWDAF), or the home domain core network element (e.g., H-PCF or H-SMF) may include a processor 810, and the processor 810 executes the method executed by the home domain policy control network element (i.e., H-PCF), the home domain session management network element (i.e., H-SMF), the visited domain session management network element (i.e., V-SMF), the home domain data analysis network element (i.e., H-NWDAF), or the home domain core network element (e.g., H-PCF or H-SMF) in the above method embodiments by invoking a program in a memory. The processor here may be an integrated circuit with signal processing capabilities, such as a CPU. The home domain policy control network element (i.e., H-PCF), the home domain session management network element (i.e., H-SMF), the visited domain session management network element (i.e., V-SMF), the home domain data analysis network element (i.e., H-NWDAF), or the home domain core network element (e.g., H-PCF or H-SMF) may be implemented by one or more integrated circuits configured to implement the above methods. For example: one or more ASICs, or one or more microprocessors DSP, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Alternatively, the above implementations may be combined.

In particular, the functions/implementation processes of the transceiving unit 710 and the processing unit 720 in fig. 7 may be implemented by the processor 810 in the communication device 800 shown in fig. 8 calling the computer executable instructions stored in the memory 820. Alternatively, the function/implementation procedure of the processing unit 720 in fig. 7 may be implemented by the processor 810 in the communication apparatus 800 shown in fig. 8 calling a computer executing instruction stored in the memory 820, and the function/implementation procedure of the transceiving unit 710 in fig. 7 may be implemented by the interface 830 in the communication apparatus 800 shown in fig. 8.

Those of ordinary skill in the art will understand that: the first, second, third, fourth, etc. numerical references mentioned in this application are only for convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the order of priority. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one" means one or more. At least two means two or more. "at least one," "any," or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one (one ) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. "plurality" means two or more, and other terms are analogous.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The various illustrative logical units and circuits described in this application may be implemented or operated upon by design of a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in the embodiments herein may be embodied directly in hardware, in a software element executed by a processor, or in a combination of the two. The software cells may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), EPROM Memory, EEPROM Memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one or more exemplary designs, the functions described herein may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media that facilitate transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to carry or store program code in the form of instructions or data structures and which can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Additionally, any connection is properly termed a computer-readable medium, and, thus, is included if the software is transmitted from a website, server, or other remote source over a coaxial cable, fiber optic computer, twisted pair, Digital Subscriber Line (DSL), or wirelessly, e.g., infrared, radio, and microwave. The disk (disk) and Disc (Disc) include compact Disc, laser Disc, optical Disc, Digital Versatile Disc (DVD), floppy disk and blu-ray Disc, where the disk usually reproduces data magnetically, and the Disc usually reproduces data optically with laser. Combinations of the above may also be included in the computer-readable medium.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application. The foregoing description of the specification may enable any person skilled in the art to make or use the teachings of the present application, and any modifications based on the disclosed teachings should be considered as obvious in the art, and the general principles described herein may be applied to other variations without departing from the spirit or scope of the present application. Thus, the disclosure is not intended to be limited to the embodiments and designs described, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

1. A method of communication, comprising:

a home domain policy control network element sends policy information to a home domain session management network element, wherein the policy information comprises an identifier of at least one service data stream and a first quality of service (QoS) parameter corresponding to the at least one service data stream;

the home domain policy control network element receives feedback information from the home domain session management network element;

and the home domain policy control network element determines not to send QoS parameters with higher requirements than QoS parameters rejected by a visited domain public land mobile network VPLMN and/or QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the feedback information.

2. The communication method according to claim 1, wherein the feedback information includes an identifier of a rejected service data flow of the at least one service data flow, and the rejected service data flow is a service data flow corresponding to the QoS parameter rejected by the VPLMN among the first QoS parameters;

the determining, by the home domain policy control network element according to the feedback information, that the QoS parameter with a higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter is not sent to the home domain session management network element includes:

and the home domain policy control network element determines not to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameters to the home domain session management network element according to the identifier of the rejected service data stream.

3. The communication method according to claim 1, wherein the feedback information includes an identification of an allowed service data flow of the at least one service data flow, the allowed service data flow being a service data flow corresponding to the QoS parameter allowed by the VPLMN among the first QoS parameters;

and the home domain policy control network element determines not to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element according to the identifier of the allowed service data stream.

4. The communication method according to claim 1, wherein the feedback information comprises indication information indicating that the VPLMN cannot satisfy some or all of the first QoS parameters;

and the home domain policy control network element determines not to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element according to the indication information.

5. The communication method according to claim 4, wherein the feedback information further comprises QoS parameters of the first QoS parameters that are rejected by the VPLMN, and/or QoS parameters of the first QoS parameters that are allowed by the VPLMN.

6. The communication method according to claim 4 or 5, wherein the feedback information further comprises an identification of a rejected traffic data flow of the at least one traffic data flow and/or an identification of an allowed traffic data flow of the at least one traffic data flow;

the rejected service data flow is a service data flow corresponding to the QoS parameter rejected by the VPLMN in the first QoS parameter, and the allowed service data flow is a service data flow corresponding to the QoS parameter allowed by the VPLMN in the first QoS parameter.

7. The communication method according to any one of claims 1 to 6, wherein determining, by the home domain policy control network element, not to send, to the home domain session management network element, the QoS parameters that require higher requirements than those rejected by a VPLMN and/or the QoS parameters rejected by the VPLMN among the first QoS parameters according to the feedback information comprises:

and the home domain policy control network element determines not to send the QoS parameters with higher requirements than the QoS parameters rejected by the VPLMN and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element before the VPLMN is changed according to the feedback information.

8. The communication method of claim 7, further comprising:

the home domain policy control network element receives notification information from the home domain session management network element, wherein the notification information is used for notifying that a VPLMN is changed;

and the home domain policy control network element determines to send the QoS parameter with higher requirement than the QoS parameter rejected by the VPLMN and/or the QoS parameter rejected by the VPLMN in the first QoS parameter to the home domain session management network element according to the notification information.

9. The communication method of claim 8, further comprising:

and the home domain policy control network element sends a subscription request to the home domain session management network element, wherein the subscription request is used for subscribing a PLMN change event.

10. The communication method according to any of claims 1-9, wherein the first QoS parameter comprises one or more of the following information:

the 5G service quality marks 5QI, and allocates and occupies priority ARP, uplink bandwidth, downlink bandwidth, time delay, packet loss rate and error rate.

11. A method of communication, comprising:

a home domain session management network element receives a first quality of service (QoS) parameter corresponding to a service data stream from a home domain policy control network element;

the home domain session management network element sends a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter;

the home domain session management network element receives first feedback information from the visit domain session management network element;

the home domain session management network element determines that part or all of the second QoS parameters are rejected according to the first feedback information;

the home domain session management network element monitors whether the VPLMN is changed;

after monitoring that the VPLMN changes, the home domain session management network element sends notification information to a home domain policy control network element, where the notification information is used to notify that the VPLMN changes, and the notification information triggers the home domain policy control network element to send a third QoS parameter to the home domain session management network element, where the third QoS parameter includes a QoS parameter that is rejected by the first VPLMN in the second QoS parameter, and/or a QoS parameter that has a higher requirement than the QoS parameter that is rejected by the first VPLMN.

12. The communication method of claim 11, further comprising:

the home domain session management network element receives the third QoS parameter from the home domain policy control network element;

and the home domain session management network element sends a second QoS rule to a visited domain session management network element which belongs to a second VPLMN, wherein the second QoS rule comprises a second identifier of at least one second QoS flow and a fourth QoS parameter corresponding to the at least one second QoS flow, and the fourth QoS parameter is obtained according to the third QoS parameter.

13. The communication method according to claim 11 or 12, wherein the first feedback information includes an identification of a rejected QoS flow of the at least one first QoS flow, the rejected QoS flow being a QoS flow of the second QoS parameters corresponding to the QoS parameter rejected by the first VPLMN;

the determining, by the home domain session management network element according to the first feedback information, that part or all of the QoS parameters in the second QoS parameters are rejected includes:

and the home domain session management network element determines that part or all of the QoS parameters in the second QoS parameters are rejected according to the rejected QoS flow identifier.

14. The communication method according to claim 11 or 12, wherein the first feedback information includes an identification of an allowed QoS flow of the at least one first QoS flow, the allowed QoS flow being a QoS flow of the second QoS parameters corresponding to the QoS parameter allowed by the first VPLMN;

and the home domain session management network element determines that part or all of the second QoS parameters are rejected according to the identifier of the allowed QoS flow.

15. The communication method according to claim 11 or 12, wherein the first feedback information comprises first indication information indicating that the first VPLMN cannot satisfy some or all of the second QoS parameters;

and the home domain session management network element determines that part or all of the second QoS parameters are rejected according to the first indication information.

16. The communication method of claim 15, wherein the first feedback information further comprises a QoS parameter of the second QoS parameters that is rejected by the first VPLMN; and/or the QoS parameters allowed by the first VPLMN in the second QoS parameters.

17. The communication method according to claim 15 or 16, wherein the first feedback information further comprises an identification of a rejected QoS flow of the at least one first QoS flow and/or an identification of an allowed QoS flow of the at least one first QoS flow;

the rejected QoS flows are QoS flows corresponding to the QoS parameters rejected by the first VPLMN in the second QoS parameters, and the allowed QoS flows are QoS flows corresponding to the QoS parameters allowed by the first VPLMN in the second QoS parameters.

18. The communication method according to any one of claims 11 to 17, further comprising:

the home domain session management network element sends second feedback information to the home domain policy control network element according to the first feedback information, where the second feedback information includes at least one of an identifier of a rejected service data flow, an identifier of an allowed service data flow, and second indication information, the rejected service data flow corresponds to a rejected QoS parameter in the second QoS parameters, the allowed service data flow corresponds to an allowed QoS parameter in the second QoS parameters, and the second indication information is used to indicate that the first VPLMN cannot satisfy part or all of the QoS parameters in the first QoS parameters.

19. The communication method according to any of claims 11-18, wherein the first QoS parameter, the second QoS parameter comprises one or more of the following information:

20. A method of communication, comprising:

a visited domain session management network element receives a quality of service (QoS) rule from a home domain session management network element, wherein the QoS rule comprises an identifier of at least one QoS flow and a QoS parameter corresponding to the at least one QoS flow;

the visited domain session management network element determines that part or all of the QoS parameters cannot be met according to the strategy of a visited domain public land mobile network (VPLMN);

and the visited domain session management network element sends indication information to the home domain session management network element, wherein the indication information is used for indicating that the VPLMN cannot meet part or all of the QoS parameters contained in the QoS rules.

21. The communication method of claim 20, further comprising:

the visited domain session management network element sends an identifier of a rejected QoS flow in the at least one QoS flow to the home domain session management network element, wherein the rejected QoS flow is a QoS flow corresponding to a QoS parameter rejected by the VPLMN in QoS parameters included in the QoS rule; and/or the presence of a gas in the gas,

and the visited domain session management network element sends an identifier of an allowed QoS flow in the at least one QoS flow to the home domain session management network element, where the allowed QoS flow is a QoS flow corresponding to a QoS parameter allowed by the VPLMN in QoS parameters included in the QoS rule.

22. The communication method according to claim 20 or 21, further comprising:

the visited domain session management network element sends the QoS parameters rejected by the VPLMN in the QoS parameters contained in the QoS rule to the home domain session management network element; and/or the presence of a gas in the gas,

and the visited domain session management network element sends the QoS parameters allowed by the VPLMN in the QoS parameters contained in the QoS rule to the home domain session management network element.

23. A method of communicating according to any of claims 20-22, wherein the QoS rules include QoS parameters including one or more of the following information:

24. A home domain policy control network element, comprising: a processor and a memory; the memory is configured to store computer-executable instructions, which, when the home-domain policy control network element is running, the processor executes the computer-executable instructions stored by the memory to cause the home-domain policy control network element to perform the communication method according to any one of claims 1 to 10.

25. A home domain session management network element, comprising: a processor and a memory; the memory is configured to store computer-executable instructions, which, when the home domain session management network element is running, the processor executes the computer-executable instructions stored by the memory to cause the home domain session management network element to perform the communication method according to any one of claims 11 to 19.

26. A visited domain session management network element, comprising: a processor and a memory; the memory is configured to store computer-executable instructions, and when the visited domain session management network element is running, the processor executes the computer-executable instructions stored by the memory to cause the visited domain session management network element to perform the communication method according to any one of claims 20 to 23.

27. A computer-readable storage medium, characterized by comprising a computer program which, when run on a computer, causes the computer to perform a communication method according to any one of claims 1-23.

28. A computer program product, characterized in that the computer program product comprises a computer program which, when run on a computer, causes the computer to carry out the communication method according to any one of claims 1-23.

29. A communication system is characterized by comprising a home domain policy control network element and a home domain session management network element;

the home domain policy control network element is configured to send policy information to the home domain session management network element, where the policy information includes an identifier of at least one service data stream and a first quality of service QoS parameter corresponding to the at least one service data stream; receiving second feedback information from the home domain session management network element; according to the second feedback information, determining not to send QoS parameters which are higher than the QoS parameters rejected by a visited domain public land mobile network (VPLMN) and/or the QoS parameters rejected by the VPLMN in the first QoS parameters to the home domain session management network element;

the home domain session management network element is configured to receive the policy information from the home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; determining the second feedback information according to the first feedback information; and sending the second feedback information to the home domain policy control network element.

30. A communication system, comprising: a home domain policy control network element and a home domain session management network element;

the home domain policy control network element is configured to send a first quality of service QoS parameter corresponding to a service data stream to the home domain session management network element;

the home domain session management network element is configured to receive the first QoS parameter from the home domain policy control network element; sending a first QoS rule to a visited domain session management network element belonging to a first visited domain public land mobile network VPLMN, wherein the first QoS rule comprises a first identifier of at least one first QoS flow and a second QoS parameter corresponding to the at least one first QoS flow, and the second QoS parameter is obtained according to the first QoS parameter; receiving first feedback information from the visited domain session management network element; determining that some or all of the second QoS parameters are rejected according to the first feedback information; monitoring whether the VPLMN is changed; after monitoring that the VPLMN changes, sending notification information to the home domain policy control network element, where the notification information is used to notify that the VPLMN changes, and the notification information triggers the home domain policy control network element to send a third QoS parameter to the home domain session management network element, where the third QoS parameter includes a QoS parameter that is rejected by the first VPLMN in the second QoS parameter, and/or a QoS parameter that has a higher requirement than the QoS parameter that is rejected by the first VPLMN.