CN112822792A

CN112822792A - Distribution method, device, equipment and storage medium of bearing identification

Info

Publication number: CN112822792A
Application number: CN201911128978.5A
Authority: CN
Inventors: 刘文豪
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2021-05-18

Abstract

The application provides a method and a device for distributing bearing identifiers, a session management network element, an access and mobility management network element and a storage medium, wherein the method comprises the following steps: when a current session is established for a terminal, an EBI allocation request message is sent to an AMF; receiving a PDU session update message sent by the AMF, wherein the PDU session update message comprises information of a session to be preempted; and when determining that the session to be preempted cannot be processed, sending a first PDU session update response message to the AMF, wherein the first PDU session update response message comprises a first reason value which cannot process the session to be preempted, and the first reason value is used for indicating that the AMF successfully preempts the EBI of the session to be preempted and allocating the EBI to the current session. Compared with the traditional technology, the method improves the success rate of EBI allocation.

Description

Distribution method, device, equipment and storage medium of bearing identification

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for allocating bearer identities, a session management network element, an access and mobility management network element, and a storage medium.

Background

With the formal commercialization of 5th Generation (5G) networks, 5G networks will emerge in our daily lives. However, in the early stage of the commercial use of 5G networks, the 5G networks cannot be covered by a large area due to the maturity of the technology and the support degree of the terminal devices, and the 5G networks and the 4th Generation (4G) networks coexist for a long time. In such networking situations, there may be an interoperation between the 5G network and the 4G network, and therefore, when the 5G performs Session creation, a Session Management network element (SMF) needs to request an Access and Mobility Management network element (AMF) to allocate an Evolved Packet System Bearer Identity (EBI) in advance. Meanwhile, because the session identifier ranges used by the 5G Network and the 4G Network are not consistent, if the number of EBIs requested to be allocated by the SMF exceeds the maximum number supported by the 4G Network, or in the session creation process, the AMF selects different SMFs for the same Data Network Name (DNN), at this time, the AMF decides to initiate the preemption process of the EBI. However, the conventional EBI preemption scheme has a lower EBI allocation power.

Disclosure of Invention

The application provides a distribution method and device for bearing identification, a session management network element, an access and mobility management network element and a storage medium.

In a first aspect, an embodiment of the present application provides a method for allocating a bearer identifier, including:

when a current session is established for a terminal, sending an evolved packet system bearer identifier (EBI) allocation request message to an access and mobility management network element (AMF);

receiving a Protocol Data Unit (PDU) session update message sent by the AMF, wherein the PDU session update message comprises information of a session to be preempted;

and when determining that the session to be preempted cannot be processed, sending a first PDU session update response message to the AMF, wherein the first PDU session update response message comprises a first reason value which cannot process the session to be preempted, and the first reason value is used for indicating that the AMF successfully preempts the EBI of the session to be preempted and allocating the EBI to the current session.

In a second aspect, an embodiment of the present application provides an apparatus for allocating a bearer identifier, including:

a first sending module, configured to send an evolved packet system bearer identifier (EBI) allocation request message to an access and mobility management network element (AMF) when a current session is created for a terminal;

a receiving module, configured to receive a protocol data unit PDU session update message sent by the AMF, where the PDU session update message includes information of a session to be preempted;

a determining module, configured to determine that the session to be preempted cannot be processed;

a second sending module, configured to send a first PDU session update response message to the AMF when the determining module determines that the session to be preempted cannot be processed, where the first PDU session update response message includes a first cause value that cannot process the session to be preempted, and the first cause value is used to indicate that the AMF successfully preempts an EBI of the session to be preempted, and allocate the EBI to the current session.

In a third aspect, an embodiment of the present application provides a session management network element, which includes a memory and a processor, where the memory stores a computer program, and the processor implements any one of the methods in the embodiment of the present application when executing the computer program.

In a fourth aspect, an embodiment of the present application provides a method for allocating a bearer identifier, including:

receiving an EBI allocation request message of an evolved packet system bearer identifier sent by a session management network element (SMF), wherein the EBI allocation request message is sent when the SMF establishes a current session for a terminal;

when determining that EBI preemption is needed according to the EBI allocation request message, sending a Protocol Data Unit (PDU) session update message to the SMF, wherein the PDU session update message comprises information of a session to be preempted;

receiving a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that the session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that the session to be preempted cannot be processed;

and determining that the EBI is successfully preempted according to the first reason value, and allocating the EBI of the session to be preempted to the current session.

In a fifth aspect, an embodiment of the present application provides an apparatus for allocating a bearer identifier, including:

a first receiving module, configured to receive an EBI allocation request message of an evolved packet system bearer identifier sent by a session management network element SMF, where the EBI allocation request message is sent when the SMF creates a current session for a terminal;

a sending module, configured to send a protocol data unit PDU session update message to the SMF when it is determined that EBI preemption is required according to the EBI allocation request message, where the PDU session update message includes information of a session to be preempted;

a second receiving module, configured to receive a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that the session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that the session to be preempted cannot be processed;

and the first processing module is used for determining that the EBI is successfully preempted according to the first reason value and distributing the EBI of the session to be preempted to the current session.

In a sixth aspect, an embodiment of the present application provides an access and mobility management network element, including a memory and a processor, where the memory stores a computer program, and the processor implements any one of the methods in the embodiment of the present application when executing the computer program.

In a seventh aspect, the present application provides a storage medium, where the storage medium stores a computer program, and the computer program, when executed by a processor, implements any one of the methods in the present application.

According to the method and device for allocating bearer identities, the session management network element and the storage medium provided by the embodiment of the application, when a current session is created for a terminal, the session management network element sends an EBI allocation request message to the AMF, then receives a PDU session update message sent by the AMF, and when the session management network element determines that the session to be preempted cannot be processed, sends a first PDU session update response message to the AMF, wherein the first PDU session update response message carries a first cause value which cannot process the session to be preempted. When determining that the session to be preempted cannot be processed, the session management network element can report a first cause value which cannot process the session to be preempted per se, so that the AMF can perform refined processing on EBI allocation based on the first cause value, thereby determining that the EBI is successfully preempted and allocating the EBI of the session to be preempted to the current session based on the subdivided first cause value; in the conventional technology, the session management network element only reports that the session to be preempted cannot be processed, so that the AMF directly judges that EBI preemption fails, and cannot allocate EBI to the current session.

The method, the apparatus, the access and mobility management network element, and the storage medium for allocating bearer identities provided in the embodiments of the present application receive an EBI allocation request message sent by an SMF, send a PDU session update message to the SMF when it is determined that EBI preemption is required according to the EBI allocation request message, and then receive a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that a session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that cannot process the session to be preempted, and according to the first cause value, determine that EBI preemption is successful, and allocate an EBI of the session to be preempted to a current session. Because the first PDU session update response message received by the access and mobile management network element carries a first reason value which cannot be processed by the SMF to the session to be preempted, the AMF can perform fine processing to EBI allocation based on the first reason value, thereby determining that the EBI is preempted successfully based on the subdivided first reason value and allocating the EBI of the session to be preempted to the current session; in the conventional technology, the AMF directly judges that EBI preemption fails when the SMF cannot process a session to be preempted, so that EBI cannot be allocated to the current session.

Drawings

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

fig. 2 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 3 is another schematic flow chart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 6 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 7 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 8 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 9 is a schematic flowchart of a method for allocating bearer identifiers according to an embodiment of the present application;

fig. 10 is a schematic internal structural diagram of an identifier-bearing distribution device according to an embodiment of the present application;

fig. 11 is a schematic internal structural diagram of an identifier-bearing distribution device according to an embodiment of the present application;

fig. 12 is a schematic internal structural diagram of a computer device according to an embodiment of the present application.

Detailed Description

The method for allocating bearer identities provided in the embodiment of the present application may be applied to a communication system as shown in fig. 1, where the communication system includes a terminal 10, an access network device 11, and a core network device 12. The core network device includes an SMF and an AMF, where the AMF may be used to allocate an EBI to the terminal, and the SMF may be used to manage a session established by the terminal. The terminal 10 is a converged terminal, that is, a terminal capable of supporting 5G and 4G network systems. Optionally, the terminal 10 may be a smart phone, a tablet computer, a smart watch, a fitness tracker, a virtual reality device, an internet of things sensor, and the like.

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The following description will be given by taking an execution subject as SMF, specifically:

fig. 2 is a flowchart illustrating a method for allocating bearer identities according to an embodiment of the present application. As shown in fig. 2, the method may include:

s101, when the current session is established for the terminal, the EBI allocation request message is sent to the AMF.

In the initial stage of 5G network business, limited by the maturity of the technology and the support degree of the terminal device, the 5G network cannot cover a large area, so the actual network may adopt a hybrid networking mode, for example, an area with a large traffic may be covered by the 5G network, and other areas may be covered by the 4G network, that is, the actual network includes both the 5G network and the 4G network. In this networking mode, there may be interworking between the 5G network and the 4G network. In order to ensure that the session of the terminal user can be smoothly switched from the 5G network to the 4G network, when the terminal establishes the current session in the 5G network, the SMF sends an EBI allocation request message to the AMF to request the AMF to allocate the EBI for the current session. It is understood that when the AMF successfully allocates the EBI for the current session, it represents that the current session can be smoothly switched from the 5G network to the 4G network, and when the AMF fails to allocate the EBI for the current session, it represents that the current session cannot be switched from the 5G network to the 4G network.

S102, receiving a Protocol Data Unit (PDU) session update message sent by the AMF, wherein the PDU session update message comprises information of a session to be preempted.

After receiving the EBI allocation request message sent by the SMF, the AMF may decide whether to initiate a preemption process for EBI based on the following two situations:

1. and determining whether to initiate the preemption of the EBI according to the number of the sessions/streams established historically, the number of the sessions/streams included by the current session and the maximum number of the EBIs supported by the 4G network. When the maximum number of EBIs supported by the 4G network cannot satisfy the number of sessions/flows included in the current session, the AMF decides that preemption of EBI needs to be initiated. For example, the maximum number of EBIs supported by the 4G network is 11, the number of sessions/streams established by the terminal in the history in the 5G network is 10, and the number of sessions/streams included in the current session is 4, so that the AMF decision needs to preempt the EBI at this time because the maximum number of EBIs supported by the 4G network cannot satisfy the number of sessions/streams included in the current session.

2. In the process of session creation, the AMF selects different SMFs for the created session according to the DNN of the terminal, that is, a plurality of anchors exist in the 5G network, and only one anchor exists in the 4G network, so that when the SMF selected for the current session by the AMF based on the same DNN is different from the SMF selected for the historical session, the AMF decides that EBI preemption is required.

And when determining that the EBI needs to be preempted, the AMF sends a PDU session update message to the SMF, wherein the PDU session update message comprises the information of the session to be preempted.

And S103, when it is determined that the session to be preempted cannot be processed, sending a first PDU session update response message to the AMF, wherein the first PDU session update response message includes a first cause value which cannot process the session to be preempted, and the first cause value is used for indicating that the AMF successfully preempts the EBI of the session to be preempted and allocating the EBI to the current session.

The first reason value comprises that the context of the session to be preempted does not exist or the network element where the session to be preempted is located is abnormal. The SMF searches the session according to the information of the session to be preempted, which is included in the PDU session update message, and when the session is searched for, the SMF sends a first PDU session update response message to the AMF, wherein the first PDU session update response message carries a first reason value of session search failure, namely 'the context of the session to be preempted does not exist', so that after the AMF receives the first PDU session update response message, the AMF can judge that the session to be preempted does not exist according to the first reason value, thereby determining that the EBI which preempts the session to be preempted succeeds in preemption, and allocating the EBI which is allocated to the session to be preempted to the current session.

The SMF searches the session according to the information of the session to be preempted, which is included in the PDU session update message, and when the SMF finds that the SMF is abnormal in the self, namely the network element where the session to be preempted is abnormal, the SMF sends a first PDU session update response message to the AMF, wherein the first reason value ' the network element where the session to be preempted is abnormal ' which cannot process the session to be preempted is carried, so that after the AMF receives the first PDU session update response message, the SMF where the session to be preempted is abnormal ' can be judged according to the first reason value ' the network element where the session to be preempted is abnormal ', thereby determining that the EBI which preempts the session to be preempted succeeds, and allocating the EBI which is allocated to the session.

In the method for allocating bearer identities provided in the embodiment of the present application, when a current session is created for a terminal, a session management network element sends an EBI allocation request message to an AMF, and then receives a PDU session update message sent by the AMF, and when the session management network element determines that a session to be preempted cannot be processed, sends a first PDU session update response message to the AMF, where the first PDU session update response message carries a first cause value that the session to be preempted cannot be processed. When determining that the session to be preempted cannot be processed, the session management network element can report a first cause value which cannot process the session to be preempted per se, so that the AMF can perform refined processing on EBI allocation based on the first cause value, thereby determining that the EBI is successfully preempted and allocating the EBI of the session to be preempted to the current session based on the subdivided first cause value; in the conventional technology, the session management network element only reports that the session to be preempted cannot be processed, so that the AMF directly judges that EBI preemption fails, and cannot allocate EBI to the current session.

When the SMF determines that the session to be preempted can be processed, in order to ensure reasonableness of EBI preemption, optionally, after S102, the method may further include: and when determining that the EBI of the session to be preempted is not allowed to be preempted, sending a second PDU session update response message to the AMF, wherein the second PDU session update response message comprises a second reason value, and the second reason value is used for indicating that the AMF fails to preempt the EBI of the session to be preempted.

The SMF may find the session according to the information of the session to be preempted included in the PDU session update message, and determine that the SMF in which the session to be preempted is located is normal, but the SMF determines that the EBI of the session to be preempted is not allowed to be preempted based on the information of the session to be preempted, and at this time, the SMF sends a second PDU session update response message to the AMF, which carries a second cause value "no preemption is allowed". In this way, after receiving the second PDU session update response message, the AMF may determine that the SMF in which the session to be preempted is located does not agree with the EBI of the session to be preempted according to the second cause value "no preemption is allowed", thereby determining that the EBI of the session to be preempted is unsuccessfully preempted.

Optionally, the process of determining, by the SMF, that the EBI of the session to be preempted is not allowed to be preempted based on the information of the session to be preempted may be: determining that the EBI of the session to be preempted is not allowed to be preempted according to the service priority of the session to be preempted; or determining that the EBI of the session to be preempted is not allowed to be preempted according to the local configuration information.

Specifically, when the SMF finds that the session to be preempted is performing a high-priority service, the SMF does not agree to preempt the EBI of the session to be preempted in order to satisfy that the high-priority service can be switched normally. Or, the local configuration information in the SMF configures a session identifier of a session that is not allowed to be preempted, and the local configuration information contains a session identifier of a session to be preempted, at this time, the SMF also does not agree to preempt the EBI of the session to be preempted.

In this embodiment, when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted based on the service priority and the local configuration information of the session to be preempted, the SMF sends a second PDU session update response message to the AMF, which carries a second cause value "no preemption is allowed", so that the AMF can determine that the EBI of the session to be preempted fails to be preempted, and does not allocate the EBI of the session to be preempted to the current session, thereby ensuring that the session of the service with high priority can be switched normally, and further ensuring the rationality of the EBI preemption.

Next, the following description takes the execution subject as AMF as an example, specifically:

fig. 3 is another schematic flow chart of a method for allocating bearer identities according to an embodiment of the present application. As shown in fig. 3, the method may include:

s201, receiving an EBI allocation request message sent by an SMF, wherein the EBI allocation request message is sent when the SMF creates a current session for a terminal.

In the initial stage of 5G network business, limited by the maturity of the technology and the support degree of the terminal device, the 5G network cannot cover a large area, so the actual network may adopt a hybrid networking mode, for example, an area with a large traffic may be covered by the 5G network, and other areas are covered by the 4G network, that is, the actual network includes both the 5G network and the 4G network. In this networking mode, there may be interworking between the 5G network and the 4G network. In order to ensure that the session of the terminal user can be smoothly switched from the 5G network to the 4G network, when the terminal establishes the current session in the 5G network, the SMF sends an EBI allocation request message to the AMF to request the AMF to allocate an EBI for the current session, so that when the terminal establishes the current session in the 5G network, the AMF can receive the EBI allocation request message sent by the SMF. It is understood that when the AMF successfully allocates the EBI for the current session, it represents that the current session can be smoothly switched from the 5G network to the 4G network, and when the AMF fails to allocate the EBI for the current session, it represents that the current session cannot be switched from the 5G network to the 4G network.

And S202, when determining that the EBI preemption is needed according to the EBI allocation request message, sending a PDU session update message to the SMF, wherein the PDU session update message comprises the information of the session to be preempted.

1. and determining whether to initiate the preemption of the EBI according to the number of the sessions/streams established historically, the number of the sessions/streams included by the current session and the maximum number of the EBIs supported by the 4G network. When the maximum number of EBIs supported by the 4G network cannot satisfy the number of sessions/flows included in the current session, the AMF decides that preemption of EBI needs to be initiated. For example, the maximum number of EBIs supported by the 4G network is 11, the number of sessions/streams established by the terminal in the 5G network in the history is 10, and the number of sessions/streams included in the current session is 4, so that the maximum number of EBIs supported by the 4G network cannot satisfy the number of sessions/streams included in the current session, that is, the AMF decision needs to preempt the EBI.

S203, receiving a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that the session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that cannot process the session to be preempted.

The first reason value comprises that the context of the session to be preempted does not exist or the network element where the session to be preempted is located is abnormal. The SMF searches the session according to the information of the session to be preempted, which is included in the PDU session update message, and when the session search fails, the SMF sends a first PDU session update response message to the AMF, wherein the first PDU session update response message carries a first cause value of the session search failure, namely 'the context of the session to be preempted does not exist'.

The SMF searches the session according to the information of the session to be preempted, which is included in the PDU session update message, and when the SMF finds that the internal abnormality of the SMF is detected, namely the network element where the session to be preempted is located is abnormal, the SMF sends a first PDU session update response message to the AMF, wherein the first cause value 'the network element where the session to be preempted is located is abnormal' which can not process the session to be preempted.

S204, according to the first reason value, determining that the EBI is successfully preempted, and distributing the EBI of the session to be preempted to the current session.

After receiving the first PDU session update response message, the AMF may determine that the session to be preempted does not exist according to the first cause value "the context of the session to be preempted does not exist", thereby determining that the EBI preempted the session to be preempted at this time is successful, and allocating the EBI allocated to the session to be preempted previously to the current session.

After receiving the first PDU session update response message, the AMF may determine that the SMF where the session to be preempted is abnormal according to the first cause value "the network element where the session to be preempted is abnormal", thereby determining that the EBI preempts the session to be preempted successfully, and allocating the EBI allocated to the session to be preempted to the current session.

The method for allocating bearer identities, provided by the embodiment of the present application, receives an EBI allocation request message sent by an SMF, and when it is determined that EBI preemption is required according to the EBI allocation request message, sends a PDU session update message to the SMF, and then receives a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that a session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that cannot process the session to be preempted, and determines that EBI preemption is successful according to the first cause value, and allocates an EBI of the session to be preempted to a current session. Because the first PDU session update response message received by the access and mobile management network element carries a first reason value which cannot be processed by the SMF to the session to be preempted, the AMF can perform fine processing to EBI allocation based on the first reason value, thereby determining that the EBI is preempted successfully based on the subdivided first reason value and allocating the EBI of the session to be preempted to the current session; in the conventional technology, the AMF directly judges that EBI preemption fails when the SMF cannot process a session to be preempted, so that EBI cannot be allocated to the current session.

In order to ensure the rationality of EBI preemption, optionally, on the basis of the foregoing embodiment, the method may further include: receiving a second PDU session update response message sent by the SMF, where the second PDU session update response message is sent when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted, and the second PDU session update response message includes a second cause value; and determining that the EBI preemption fails according to the second reason value, and sending an EBI allocation failure message to the SMF.

The SMF may find the session according to the information of the session to be preempted included in the PDU session update message, and determine that the SMF in which the session to be preempted is located is normal, but the SMF determines that the EBI of the session to be preempted is not allowed to be preempted based on the information of the session to be preempted, at this time, the AMF may receive a second PDU session update response message sent by the SMF, and the second PDU session update response message carries a second cause value "no preemption is allowed". In this way, the AMF determines that the SMF in which the session to be preempted is located does not agree with the EBI of the session to be preempted according to the second cause value "no preemption is allowed", thereby determining that the EBI of the session to be preempted is unsuccessfully preempted.

In this embodiment, when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted based on the service priority and the local configuration information in the session to be preempted, the AMF may receive a second PDU session update response message sent by the SMF, where the second PDU session update response message carries a second cause value "no preemption is allowed". Therefore, the AMF can determine that the EBI for preempting the session fails, and cannot allocate the EBI for the session to be preempted to the current session, so that the session of the high-priority service can be switched normally, and the reasonability of the EBI preemption is further ensured.

In order to facilitate understanding of those skilled in the art, the following description takes the interaction between the SMF and the AMF as an example, specifically:

example 1

As shown in fig. 4 and fig. 5, in this example, when a non-first PDU session (where the non-first PDU is a current session, and the current session may include one or more flows) is created for a terminal, and an AMF performs EBI preemption according to a local configuration decision, where a session to be preempted does not exist on an SMF, processing steps between the SMF and the AMF are as follows:

s301, the SMF to which the current session belongs sends a Namf _ Communication _ ebiaassignment Request message (EBI assignment Request message) to the AMF.

S302, the AMF decides to perform EBI preemption, and the AMF sends an Nsmf _ PDSUSessionUpdateSMContext message (PDU session update message) to the SMF to which the session to be preempted belongs.

The SMF to which the current session belongs and the SMF to which the session to be preempted belongs may be the same SMF or different SMFs. Fig. 4 is a schematic flowchart of an EBI allocation process when the SMF to which the current session belongs and the SMF to which the session to be preempted belong are the same SMF, and fig. 5 is a schematic flowchart of an EBI allocation process when the SMF to which the current session belongs and the SMF to which the session to be preempted belong are different SMFs.

S303, the SMF to which the session to be preempted belongs searches for the failure of the session according to the information of the session to be preempted carried by the PDU session update message, and replies an Nsmf _ PDScess _ UpdateSMContext Response message (a first PDU session update Response message) to the AMF, wherein the message carries a first cause value that the context of the session to be preempted does not exist.

S304, the AMF judges that the session to be preempted does not exist according to the first reason value, judges that the EBI is preempted successfully, replies a Namf _ Communication _ EBIAssignment Response (EBI allocation success Response) to the SMF to which the current session belongs, and carries an EBI list redistributed after the preemption. Wherein each EBI in the EBI list is an EBI allocated for the current session.

Since the AMF has perceived that the session to be preempted does not exist at the SMF, optionally, the method further includes:

s305, the AMF locally releases the related resources of the session to be preempted.

Example 2

As shown in fig. 6 and fig. 7, in this example, when a terminal initiates a non-first PDU session (where the non-first PDU is a current session, and the current session may include one or more flows), and when an AMF performs EBI preemption according to a local configuration decision, an SMF system where a session to be preempted is abnormal at this time, processing steps between the SMF and the AMF are as follows:

s401, the SMF to which the current session belongs sends a Namf _ Communication _ EBIAassignment Request message (EBI allocation Request message) to the AMF.

S402, AMF decides to perform EBI preemption, and AMF sends an Nsmf _ PDSUSessionUpdateSMContext message (PDU session update message) to the SMF to which the session to be preempted belongs.

The SMF to which the current session belongs and the SMF to which the session to be preempted belongs may be the same SMF or different SMFs. Fig. 6 is a flowchart illustrating an EBI allocation process when the SMF to which the current session belongs and the SMF to which the session to be preempted belong are the same SMF, and fig. 7 is a flowchart illustrating an EBI allocation process when the SMF to which the current session belongs and the SMF to which the session to be preempted belong are different SMFs.

S403, after receiving the PDU session update message, the SMF belonging to the session to be preempted finds an internal exception, and replies an Nsmf _ PDU _ update _ smcontext Response message (a first PDU session update Response message), which carries a first cause value "the network element where the session to be preempted is an exception".

S404, the AMF judges that the SMF of the session to be preempted is abnormal according to the first cause value, judges that the EBI is preempted successfully, replies Namf _ Communication _ EBIAassignment Response (EBI allocation success Response) to the SMF of the current session, and carries an EBI list redistributed after the preemption. Wherein each EBI in the EBI list is an EBI allocated for the current session.

Optionally, although the AMF senses that the SMF where the session to be preempted is located is abnormal, it cannot be determined whether the session to be preempted is really released, and whether the AMF reserves the relevant resource of the session to be preempted, or course, the AMF may also determine whether to reserve the relevant resource of the session to be preempted according to the local configuration.

Example 3

As shown in fig. 8 and fig. 9, in this example, when a non-first PDU session (where the non-first PDU is a current session, and the current session may include one or more flows) is created for a terminal, and an AMF performs EBI preemption according to a local configuration decision, at this time, a session to be preempted is performing high-priority service, processing steps between the SMF and the AMF are as follows:

s501, the SMF to which the current session belongs sends a Namf _ Communication _ EBIAassignment Request message (EBI allocation Request message) to the AMF;

s502, AMF decides to perform EBI preemption, and AMF sends an Nsmf _ PDSUSessionUpdateSMContext message (PDU session update message) to the SMF to which the session to be preempted belongs.

The SMF to which the current session belongs and the SMF to which the session to be preempted belongs may be the same SMF or different SMFs. Fig. 8 is a flowchart illustrating an EBI allocation process when the SMF to which the current session belongs and the SMF to which the session to be preempted belong are the same SMF, and fig. 9 is a flowchart illustrating an EBI allocation process when the SMF to which the current session belongs and the SMF to which the session to be preempted belong are different SMFs.

S503, after receiving the PDU session update message, the SMF belonging to the session to be preempted finds that a high priority service is in progress under the session to be preempted or does not allow to preempt the EBI of the session to be preempted according to the local configuration decision, replies an Nsmf _ PDSUSsion _ UpdateSMContext Response message (a second PDU session update Response message) and carries a second reason value 'no permission to preempt'.

And S504, the AMF judges that the SMF where the session to be preempted does not agree with preemption, judges that the EBI preemption fails, and replies a Namf _ Communication _ EBIAassignment Error (EBI assignment failure response) to the SMF where the current session belongs, wherein the Namf _ Communication _ EBI assignment failure response can carry a reason value of assignment failure.

Fig. 10 is a schematic internal structural diagram of an identifier-bearing distribution device provided in an embodiment of the present application, and as shown in fig. 10, the device may include: a first sending module 20, a receiving module 21, a determining module 22 and a second sending module 23.

Specifically, the first sending module 20 is configured to send an EBI allocation request message to the AMF when the current session is created for the terminal;

the receiving module 21 is configured to receive a PDU session update message sent by the AMF, where the PDU session update message includes information of a session to be preempted;

the determining module 22 is configured to determine that the session to be preempted cannot be processed;

the second sending module 23 is configured to send a first PDU session update response message to the AMF when the determining module determines that the session to be preempted cannot be processed, where the first PDU session update response message includes a first cause value that cannot be processed for the session to be preempted, and the first cause value is used to indicate that the AMF successfully preempts the EBI of the session to be preempted, and allocate the EBI to the current session.

In the allocation apparatus for bearer identities provided in the embodiment of the present application, when a current session is created for a terminal, a session management network element sends an EBI allocation request message to an AMF, and then receives a PDU session update message sent by the AMF, and when the session management network element determines that a session to be preempted cannot be processed, sends a first PDU session update response message to the AMF, where the first PDU session update response message carries a first cause value that the session to be preempted cannot be processed. When determining that the session to be preempted cannot be processed, the session management network element can report a first cause value which cannot process the session to be preempted per se, so that the AMF can perform refined processing on EBI allocation based on the first cause value, thereby determining that the EBI is successfully preempted and allocating the EBI of the session to be preempted to the current session based on the subdivided first cause value; in the conventional technology, the session management network element only reports that the session to be preempted cannot be processed, so that the AMF directly judges that EBI preemption fails, and cannot allocate EBI to the current session.

Optionally, on the basis of the foregoing embodiment, the first cause value includes that the context of the session to be preempted does not exist or a network element in which the session to be preempted is located is abnormal.

Optionally, on the basis of the foregoing embodiment, the determining module 22 is further configured to determine that the EBI of the session to be preempted is not allowed to be preempted; the device further comprises: and a third sending module.

Specifically, the third sending module is configured to send a second PDU session update response message to the AMF when the determining module determines that the EBI of the session to be preempted is not allowed to be preempted, where the second PDU session update response message includes a second cause value, and the second cause value is used to indicate that the AMF fails to preempt the EBI of the session to be preempted.

Optionally, on the basis of the foregoing embodiment, the determining module 22 is specifically configured to determine, according to the service priority of the session to be preempted, that the EBI of the session to be preempted is not allowed to be preempted; alternatively, the determining module 22 is specifically configured to determine, according to the local configuration information, that the EBI of the session to be preempted is not allowed to be preempted.

Fig. 11 is a schematic diagram of another internal structure of an identifier-bearing distribution device provided in an embodiment of the present application, and as shown in fig. 11, the device may include: a first receiving module 30, a sending module 31, a second receiving module 32 and a first processing module 33.

Specifically, the first receiving module 30 is configured to receive an EBI allocation request message sent by an SMF, where the EBI allocation request message is sent when the SMF creates a current session for a terminal;

the sending module 31 is configured to send a PDU session update message to the SMF when it is determined that EBI preemption is required according to the EBI allocation request message, where the PDU session update message includes information of a session to be preempted;

the second receiving module 32 is configured to receive a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that the session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that the session to be preempted cannot be processed;

the first processing module 33 is configured to determine that the EBI preemption is successful according to the first cause value, and allocate the EBI of the session to be preempted to the current session.

The allocation apparatus for bearer identities, provided in the embodiment of the present application, receives an EBI allocation request message sent by an SMF, and when it is determined that EBI preemption is required according to the EBI allocation request message, sends a PDU session update message to the SMF, and then receives a first PDU session update response message sent by the SMF, where the first PDU session update response message is sent when the SMF determines that a session to be preempted cannot be processed, and the first PDU session update response message includes a first cause value that cannot process the session to be preempted, and according to the first cause value, determines that EBI preemption is successful, and allocates an EBI of the session to be preempted to a current session. Because the first PDU session update response message received by the access and mobile management network element carries a first reason value which cannot be processed by the SMF to the session to be preempted, the AMF can perform fine processing to EBI allocation based on the first reason value, thereby determining that the EBI is preempted successfully based on the subdivided first reason value and allocating the EBI of the session to be preempted to the current session; in the conventional technology, the AMF directly judges that EBI preemption fails when the SMF cannot process a session to be preempted, so that EBI cannot be allocated to the current session.

Optionally, on the basis of the above embodiment, the apparatus further includes: the device comprises a third receiving module and a second processing module.

Specifically, the third receiving module is configured to receive a second PDU session update response message sent by the SMF, where the second PDU session update response message is sent when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted, and the second PDU session update response message includes a second cause value;

and the second processing module is used for determining the EBI preemption failure according to the second reason value and sending an EBI allocation failure message to the SMF.

In one embodiment, a computer device is provided, which may be a session management network element or an access and mobility management network element, and an internal structure diagram of the computer device may be as shown in fig. 12. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing data in the bearer identification assignment process. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of bearer identity assignment.

Those skilled in the art will appreciate that the architecture shown in fig. 12 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, there is provided a session management network element comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program:

when a current session is established for a terminal, an EBI allocation request message is sent to an AMF;

receiving a PDU session update message sent by the AMF, wherein the PDU session update message comprises information of a session to be preempted;

Optionally, the first cause value includes that the context of the session to be preempted does not exist or a network element in which the session to be preempted is located is abnormal.

In one embodiment, the processor, when executing the computer program, further performs the steps of: and when determining that the EBI of the session to be preempted is not allowed to be preempted, sending a second PDU session update response message to the AMF, wherein the second PDU session update response message comprises a second reason value, and the second reason value is used for indicating that the AMF fails to preempt the EBI of the session to be preempted.

In one embodiment, the processor, when executing the computer program, further performs the steps of: determining that the EBI of the session to be preempted is not allowed to be preempted according to the service priority of the session to be preempted; or determining that the EBI of the session to be preempted is not allowed to be preempted according to the local configuration information.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

In one embodiment, the computer program when executed by the processor further performs the steps of: determining that the EBI of the session to be preempted is not allowed to be preempted according to the service priority of the session to be preempted; or determining that the EBI of the session to be preempted is not allowed to be preempted according to the local configuration information.

In one embodiment, there is provided an access and mobility management network element comprising a memory and a processor, the memory having stored therein a computer program that when executed by the processor performs the steps of:

receiving an EBI allocation request message sent by an SMF, wherein the EBI allocation request message is sent when the SMF establishes a current session for a terminal;

when determining that EBI preemption is needed according to the EBI allocation request message, sending a PDU session update message to the SMF, wherein the PDU session update message comprises information of a session to be preempted;

In one embodiment, the processor, when executing the computer program, further performs the steps of: receiving a second PDU session update response message sent by the SMF, where the second PDU session update response message is sent when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted, and the second PDU session update response message includes a second cause value; and determining that the EBI preemption fails according to the second reason value, and sending an EBI allocation failure message to the SMF.

In one embodiment, the computer program when executed by the processor further performs the steps of: receiving a second PDU session update response message sent by the SMF, where the second PDU session update response message is sent when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted, and the second PDU session update response message includes a second cause value; and determining that the EBI preemption fails according to the second reason value, and sending an EBI allocation failure message to the SMF.

The bearer identifier allocating apparatus, the session management network element, the access and mobility management network element, and the storage medium provided in the foregoing embodiments may execute the bearer identifier allocating method provided in any embodiment of the present application, and have corresponding functional modules and beneficial effects for executing the method. For technical details that are not described in detail in the foregoing embodiments, reference may be made to a method for allocating bearer identities provided in any embodiment of the present application.

The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application.

In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.

Embodiments of the application may be implemented by a data processor of the fault injection testing apparatus executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (digital versatile disks, DVDs, or CD discs), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.

The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the drawings and the following claims without departing from the scope of the invention. Accordingly, the proper scope of the application is to be determined according to the claims.

Claims

1. A method for allocating bearer identities, comprising:

2. The method of claim 1, wherein the first cause value comprises an absence of context for the session to be preempted or an anomaly in a network element in which the session to be preempted is located.

3. The method of claim 1, further comprising:

and when determining that the EBI of the session to be preempted is not allowed to be preempted, sending a second PDU session update response message to the AMF, wherein the second PDU session update response message comprises a second reason value, and the second reason value is used for indicating that the AMF fails to preempt the EBI of the session to be preempted.

4. The method of claim 3, wherein the determining that the EBI that is not allowed to preempt the session to be preempted comprises:

determining that the EBI of the session to be preempted is not allowed to be preempted according to the service priority of the session to be preempted;

or,

and determining that the EBI of the session to be preempted is not allowed to be preempted according to the local configuration information.

5. A method for allocating bearer identities, comprising:

6. The method of claim 5, wherein the first cause value comprises an absence of context for the session to be preempted or an anomaly in a network element in which the session to be preempted is located.

7. The method of claim 5, further comprising:

receiving a second PDU session update response message sent by the SMF, where the second PDU session update response message is sent when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted, and the second PDU session update response message includes a second cause value;

and determining that the EBI preemption fails according to the second reason value, and sending an EBI allocation failure message to the SMF.

8. An apparatus for assigning bearer identities, comprising:

9. The apparatus of claim 8, wherein the first cause value comprises an absence of context for the session to be preempted or an anomaly in a network element in which the session to be preempted is located.

10. The apparatus of claim 8, wherein the determining module is further configured to determine that the EBI of the session to be preempted is not allowed to be preempted; the device further comprises:

a third sending module, configured to send a second PDU session update response message to the AMF when the determining module determines that the EBI of the session to be preempted is not allowed to be preempted, where the second PDU session update response message includes a second cause value, and the second cause value is used to indicate that the AMF fails to preempt the EBI of the session to be preempted.

11. The apparatus of claim 10,

the determining module is specifically configured to determine, according to the service priority of the session to be preempted, that the EBI of the session to be preempted is not allowed to be preempted;

or,

12. An apparatus for assigning bearer identities, comprising:

13. The apparatus of claim 12, wherein the first cause value comprises an absence of context for the session to be preempted or an anomaly in a network element in which the session to be preempted is located.

14. The apparatus of claim 12, further comprising:

a third receiving module, configured to receive a second PDU session update response message sent by the SMF, where the second PDU session update response message is sent when the SMF determines that the EBI of the session to be preempted is not allowed to be preempted, and the second PDU session update response message includes a second cause value;

and the second processing module is used for determining that the EBI preemption fails according to the second reason value and sending an EBI allocation failure message to the SMF.

15. A session management network element comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program performs the steps of the method of any of claims 1 to 4.

16. An access and mobility management network element comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any of claims 5 to 7 when executing the computer program.

17. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1-7.