CN109392033B

CN109392033B - Data transmission method, device, system, base station, AMF and medium

Info

Publication number: CN109392033B
Application number: CN201710671654.0A
Authority: CN
Inventors: 吴玲
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2017-08-08
Filing date: 2017-08-08
Publication date: 2020-11-24
Anticipated expiration: 2037-08-08
Also published as: CN109392033A

Abstract

The invention discloses a data transmission method, a device, a system, a base station, an AMF and a medium, which are used for reducing signaling of UE, the base station and the AMF when the AMF serving the UE is changed. The method comprises the following steps: a base station receives a message which is sent by UE and carries first GUTI information, wherein the first GUTI information comprises a first ID of a first AMF GROUP; when determining that the AMF capable of serving the UE is not stored, determining a first AMF capable of serving the UE in a second AMF GROUP accessed by the first AMF, forwarding the message and the identifier of the UE to the first AMF, and sending the message to the core network side equipment after the first AMF acquires the context of the UE from a shared network element in the first AMF GROUP. Because the first AMF obtains the context of the UE from the shared network element and does not need to judge whether the AMF ID is the same or not, the signaling of the UE, the base station and the AMF is reduced.

Description

Data transmission method, device, system, base station, AMF and medium

Technical Field

The present invention relates to the field of network data transmission technologies, and in particular, to a data transmission method, apparatus, system, base station, AMF, and medium.

Background

In a 4G network, a GROUP, i.e., Global Unique Temporary Identifier (GUTI) information allocated by multiple AMFs in the AMF GROUP to a UE, is different, the GUTI information includes information of an Identity identifier ID of the AMF GROUP and an ID of the AMF GROUP, the UE carries the GUTI information in a message sent to a core network side device by a base station, the base station may find the AMF GROUP where the UE is located by including the ID of the AMF GROUP in the GUTI information, which may be called as the AMF GROUP ID, and find the AMF in the AMF GROUP that stores the Unique context information of the UE, i.e., the AMF that can serve the UE, by using the ID of the AMF.

When the UE sends the message carrying the GUTI information to the core network side device through the base station, the base station may first send the message to the AMF, and the AMF identifies whether the AMF GROUP ID included in the GUTI information is the same as the AMF GROUP ID stored in the AMF GROUP ID, and whether the AMF ID is the same as the AMF ID stored in the AMF GROUP ID. If the AMF GROUP IDs are the same, the AMF IDs may be the same or different, and if the AMF GROUP IDs are different, the AMF IDs must be different.

If the AMF IDs are different, it indicates that the AMF serving the UE is changed, and the new AMF currently receiving the message reallocates the GUTI information to the UE, thereby causing signaling interaction between the UE, the base station, and the AMF, for example, signaling S1 to release, reattach, Track Area Update (TAU), GUTI reallocation, and the like.

When the AMF serving the UE changes, if the original AMF serving the UE fails, the UE is in an abnormal state, and the context information of the UE on the original AMF is lost, so as to ensure data interaction, the UE needs to be reattached to the new AMF, that is, the new AMF stores the context information of the UE. If the original AMF determines to stop serving the UE, aiming at the UE in an idle state, the original AMF firstly loads the UE, establishes RRC/S1/S11 connection, releases the RRC/S1/S11 connection, and establishes RRC/S1/S11 connection through TAU, so that the signaling is complex; for the UE in the connected state, the original AMF releases S1 connection, and sends a cause value "load balancing TAU required" to the UE, and the UE re-initiates the TAU and migrates to a new AMF, where the new AMF has no context of the UE and the UE also needs to be re-attached to the new AMF.

When the AMF serving the UE changes, there is no solution at present how to reduce the signaling interaction between the UE, the base station and the AMF and reduce the stickiness between the UE and the core network.

Disclosure of Invention

The embodiment of the invention discloses a data transmission method, a device, a system, a base station, an AMF and a medium, which are used for solving the problem of reducing signaling interaction among UE, the base station and the AMF when the AMF serving the UE is changed in the prior art.

In order to achieve the above object, an embodiment of the present invention discloses a data transmission method applied to a base station, where the method includes:

receiving a message which is sent by a mobile terminal and carries a first globally unique temporary identifier GUTI information, wherein the first GUTI information comprises a first identity identifier ID of a first authentication management function entity GROUP AMF GROUP corresponding to the mobile terminal and does not comprise the AMF ID;

determining whether an AMF capable of serving the mobile terminal is stored;

if not, according to a pre-stored method, determining a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the mobile terminal, and forwarding the message and the identification information of the mobile terminal to the first AMF, so that the first AMF acquires the context information of the mobile terminal from a shared network element in the first AMF GROUP corresponding to the first ID, and then sends the message to corresponding core network side equipment.

Further, the determining whether the AMF capable of serving the mobile terminal is stored includes:

judging whether a second AMF corresponding to the mobile terminal is stored;

if not, determining that the AMF capable of serving the mobile terminal is not stored;

if so, judging whether the second AMF can serve the mobile terminal, if not, determining that the AMF which can serve the mobile terminal is not stored, otherwise, determining that the AMF which can serve the mobile terminal is stored.

Further, the determining whether the second AMF can serve the mobile terminal includes:

judging whether a message which is sent by the second AMF and stops serving the mobile terminal is received or not, and judging whether the second AMF is in an abnormal state or not;

and if at least one judgment result is yes, determining that the AMF capable of serving the mobile terminal is not stored, and if both the judgment results are no, determining that the AMF capable of serving the mobile terminal is stored.

Further, the determining, according to a pre-stored method, a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the mobile terminal includes:

identifying load information of each AMF in the second AMF GROUP accessed by the user;

and determining a first AMF capable of serving the mobile terminal in the second AMF GROUP according to the load information of each AMF.

Further, after determining the first AMF capable of serving the mobile terminal, the method further includes:

and updating the AMF corresponding to the mobile terminal aiming at the mobile terminal.

Further, the method further comprises:

receiving a reallocation instruction which is sent by the first AMF and carries the identification information of the mobile terminal and second GUTI information, sending the reallocation instruction to the mobile terminal, and enabling the mobile terminal to update the first GUTI information stored by the mobile terminal according to the second GUTI information, wherein the second GUTI information comprises a second ID of the second AMF GROUP and does not comprise AMF ID, and the reallocation instruction is sent by the first AMF equipment when the second ID of the second AMF GROUP accessed by the first AMF equipment is judged to be different from the first ID.

The embodiment of the invention discloses a data transmission method which is applied to an authentication management function entity (AMF), and the method comprises the following steps:

receiving identification information of a mobile terminal and a message carrying first globally unique temporary identification GUTI information sent by a base station, wherein the first GUTI information comprises a first identity identification information ID of a first AMF GROUP GROUP corresponding to the mobile terminal and does not comprise an AMF ID, and the base station forwards the message and the identification information of the mobile terminal to the AMF after determining that AMF capable of serving the mobile terminal is not stored in the AMF GROUP accessed by the base station according to a pre-storage method and determining AMF capable of serving the mobile terminal in the AMF GROUP accessed by the base station;

and obtaining the context information of the mobile terminal from a first shared network element in a first AMF GROUP corresponding to the first ID, and sending the message sent by the base station to corresponding core network side equipment.

Further, the obtaining the context information of the mobile terminal from the first shared network element in the first AMF GROUP corresponding to the first ID includes:

judging whether a second ID of a second AMF GROUP accessed by the self is the same as the first ID;

if so, sending a context information acquisition request carrying the identification information of the mobile terminal to a first shared network element in a first AMF GROUP corresponding to the first ID, and receiving the context information of the mobile terminal returned by the first shared network element;

if not, acquiring the context information of the mobile terminal in the first sharing network element in the first AMF GROUP corresponding to the first ID through a second sharing network element in a second AMF GROUP accessed by the mobile terminal, and receiving the context information of the mobile terminal returned by the second sharing network element.

Further, if the second ID of the second AMF GROUP accessed by itself is different from the first ID, the method further includes:

and sending a reallocation instruction carrying the identification information of the mobile terminal and second GUTI information to the base station, so that the base station sends the reallocation instruction to the mobile terminal, and the mobile terminal updates the first GUTI information stored by the mobile terminal according to the second GUTI information, wherein the second GUTI information comprises the second ID and does not comprise AMF ID.

The embodiment of the invention discloses a data transmission device, which is applied to a base station, and comprises:

a receiving module, configured to receive a message that is sent by a mobile terminal and carries a first globally unique temporary identifier GUTI information, where the first GUTI information includes a first identity identifier ID of a first authentication management function entity GROUP AMF GROUP corresponding to the mobile terminal and does not include an AMF ID;

the judging module is used for determining whether AMF capable of serving the mobile terminal is stored;

a determining module, configured to determine, according to a pre-stored method, a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the determining module when a determination result of the determining module is negative;

a sending module, configured to forward the message and the identifier information of the mobile terminal to the first AMF, so that the first AMF obtains context information of the mobile terminal from a shared network element in a first AMF GROUP corresponding to the first ID, and then sends the message to a corresponding core network side device.

The embodiment of the invention discloses a data transmission device, which is applied to an authentication management function entity (AMF), and comprises:

a receiving module, configured to receive identifier information of a mobile terminal and a message carrying globally unique temporary identifier GUTI information sent by a base station, where the GUTI information includes a first identity identifier ID of a first AMF GROUP corresponding to the mobile terminal and does not include an AMF ID, and the base station forwards the message and the identifier information of the mobile terminal to an AMF after determining that the AMF capable of serving the mobile terminal is not stored in the AMF GROUP accessed by the base station according to a pre-storage method and determining an AMF capable of serving the mobile terminal in the AMF GROUP accessed by the base station;

a sending module, configured to obtain context information of the mobile terminal from a first shared network element in a first AMF GROUP corresponding to the first ID, and send the message sent by the base station to a corresponding core network side device.

The embodiment of the invention discloses a base station, which comprises: a memory, a processor, and a transceiver;

the transceiver is configured to receive, under control of the processor, a message that is sent by a mobile terminal and carries a first globally unique temporary identifier GUTI information, where the first GUTI information includes a first identity identifier ID of a first authentication management function entity GROUP AMF GROUP corresponding to the mobile terminal and does not include an AMF ID;

the processor is used for reading the program in the memory and executing the following processes: determining whether an AMF capable of serving the mobile terminal is stored; if not, determining a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the mobile terminal according to a pre-stored method;

the transceiver is configured to forward the message and the identifier information of the mobile terminal to the first AMF under the control of the processor, so that the first AMF sends the message to a corresponding core network side device after acquiring the context information of the mobile terminal from a shared network element in a first AMF GROUP corresponding to the first ID.

Further, the processor is specifically configured to determine whether a second AMF corresponding to the mobile terminal is stored; if not, determining that the AMF capable of serving the mobile terminal is not stored; if so, judging whether the second AMF can serve the mobile terminal, if not, determining that the AMF which can serve the mobile terminal is not stored, otherwise, determining that the AMF which can serve the mobile terminal is stored.

Further, the processor is specifically configured to determine whether a message sent by the second AMF and used for stopping serving the mobile terminal is received, and determine whether the second AMF is in an abnormal state; and if at least one judgment result is yes, determining that the AMF capable of serving the mobile terminal is not stored, and if both the judgment results are no, determining that the AMF capable of serving the mobile terminal is stored.

Further, the processor is specifically configured to identify load information of each AMF in the second AMF GROUP to which the processor is connected; and determining a first AMF capable of serving the mobile terminal in the second AMF GROUP according to the load information of each AMF.

Further, the processor is further configured to update, for the mobile terminal, an AMF corresponding to the mobile terminal.

Further, the transceiver is further configured to receive, under the control of the processor, a reallocation instruction that is sent by the first AMF and carries the identification information of the mobile terminal and second GUTI information, and send the reallocation instruction to the mobile terminal, so that the mobile terminal updates, according to the second GUTI information, the first GUTI information stored by the mobile terminal itself, where the second GUTI information includes a second ID of the second AMF GROUP and does not include an AMF ID, and the reallocation instruction is sent by the first AMF device when it is determined that the second ID of the second AMF GROUP to which the first AMF device is connected is different from the first ID.

The embodiment of the invention discloses an authentication management function entity AMF, which comprises: a memory, a processor, and a transceiver;

the processor is used for reading the computer program stored in the memory and executing the following processes:

controlling the transceiver to receive identification information of a mobile terminal and a message carrying first globally unique temporary identification GUTI information sent by a base station, wherein the first GUTI information comprises a first identity Identification (ID) of a first AMF GROUP GROUP corresponding to the mobile terminal and does not comprise an AMF ID, and the base station determines that AMF capable of serving the mobile terminal is not stored, and forwards the message and the identification information of the mobile terminal to the AMF after determining that AMF capable of serving the mobile terminal is stored in the AMF GROUP accessed by the base station according to a pre-stored method;

and controlling the transceiver to acquire the context information of the mobile terminal from a first shared network element in a first AMF GROUP corresponding to the first ID, and sending the message sent by the base station to corresponding core network side equipment.

Further, the processor is specifically configured to determine whether a second ID of a second AMF GROUP accessed by the processor is the same as the first ID; if the judgment result is yes, the processor controls the transceiver to send a context information acquisition request carrying the identification information of the mobile terminal to a first shared network element in a first AMF GROUP corresponding to the first ID, and receives the context information of the mobile terminal returned by the first shared network element; if not, the processor controls the transceiver to acquire the context information of the mobile terminal in the first sharing network element in the first AMF GROUP corresponding to the first ID through a second sharing network element in a second AMF GROUP accessed by the transceiver, and receives the context information of the mobile terminal returned by the second sharing network element.

Further, if the processor determines that the second ID of the second AMF GROUP accessed by the processor is different from the first ID, the transceiver is further configured to send a reallocation instruction carrying the identification information of the mobile terminal and second GUTI information to the base station under the control of the processor, so that the base station sends the reallocation instruction to the mobile terminal, and the mobile terminal updates the first GUTI information stored by the mobile terminal according to the second GUTI information, where the second GUTI information includes the second ID and does not include the AMF ID.

The embodiment of the invention discloses a data transmission system, which comprises a base station and an authentication management function entity AMF.

The embodiment of the invention discloses a base station, which comprises: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

the memory has stored therein a computer program which, when executed by the processor, causes the processor to perform the steps of the method of data transmission.

The embodiment of the invention discloses an authentication management function entity AMF, which comprises the following components: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

The embodiment of the invention discloses a computer readable storage medium, which stores a computer program executable by a base station, and when the program runs on the base station, the base station executes the steps of the data transmission method.

The embodiment of the invention discloses a computer readable storage medium, which stores a computer program executable by an Authentication Management Function (AMF), and when the program runs on the AMF, the AMF executes the steps of the data transmission method.

The embodiment of the invention discloses a data transmission method, a device, a system, a base station, an AMF and a medium, wherein the method comprises the following steps: receiving a message which is sent by a mobile terminal and carries first GUTI information, wherein the first GUTI information comprises a first ID of a first AMF GROUP corresponding to the mobile terminal and does not comprise an AMF ID; determining whether an AMF capable of serving the mobile terminal is stored; if not, according to a pre-stored method, determining a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the mobile terminal, and forwarding the message and the identification information of the mobile terminal to the first AMF, so that the first AMF acquires the context information of the mobile terminal from a shared network element in the first AMF GROUP corresponding to the first ID, and then sends the message to corresponding core network side equipment. In the embodiment of the present invention, the context information of the UE is stored in the shared network element in the AMF GROUP, when the AMF serving the UE changes, the first AMF capable of serving the UE determined by the base station may acquire the context information of the UE from the shared network element without the UE being reattached to the first AMF, and the GUTI information includes the ID of the AMF GROUP and does not include the AMF ID.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a data transmission process provided in embodiment 1 of the present invention;

fig. 2 is a schematic diagram of a data transmission process according to embodiment 6 of the present invention;

fig. 3 is a schematic diagram of a data transmission system according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a data transmission system according to an embodiment of the present invention;

fig. 5 is a structural diagram of a data transmission apparatus according to embodiment 9 of the present invention;

fig. 6 is a structural diagram of a data transmission apparatus according to embodiment 10 of the present invention;

fig. 7 is a base station according to embodiment 11 of the present invention;

fig. 8 is an authentication management function entity according to embodiment 12 of the present invention;

fig. 9 is a structural diagram of a data transmission system according to embodiment 13 of the present invention;

fig. 10 is a base station according to embodiment 14 of the present invention;

fig. 11 is an authentication management functional entity according to embodiment 15 of the present invention.

Detailed Description

In order to reduce signaling interaction among the UE, the base station, and the AMF when the AMF serving the UE changes, embodiments of the present invention provide a data transmission method, apparatus, system, base station, AMF, and medium.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

fig. 1 is a schematic diagram of a data transmission process provided in embodiment 1 of the present invention, where the process includes the following steps:

s101: receiving a message which is sent by a mobile terminal and carries first GUTI information, wherein the first GUTI information comprises a first ID of a first AMF GROUP corresponding to the mobile terminal and does not comprise an AMF ID.

The data transmission method provided by the embodiment of the invention is applied to the base station.

When there is a message to be sent to the core network side device, the UE sends the message to the base station, so that the base station forwards the message to the core network side device. The message sent by the UE carries the GUTI information of the UE, where the GUTI information includes a first ID of a first AMF GROUP corresponding to the UE, and the first ID of the first AMF GROUP is an AMF GROUP ID stored by the UE itself.

S102: determining whether an AMF capable of serving the mobile terminal is stored; if not, S103 is performed.

S103: according to the method stored in advance, in a second AMF GROUP accessed by the mobile terminal, a first AMF capable of serving the mobile terminal is determined, the message and the identification information of the mobile terminal are forwarded to the first AMF, and after the first AMF acquires the context information of the mobile terminal from a shared network element in the first AMF GROUP corresponding to the first ID, the message is sent to the corresponding core network side equipment.

And after receiving the message carrying the first GUTI information sent by the UE, the base station judges whether AMF capable of serving the UE is stored.

The base station stores the method of AMF determined to serve the UE in advance, and stores the identification information of each AMF in the AMF GROUP accessed by the base station, if the base station determines that the base station does not store the AMF capable of serving the UE, the base station determines the first AMF capable of serving the UE in the second AMF GROUP accessed by the base station according to the method stored in advance. The preset method may be, for example, determining any one AMF in the second AMF GROUP, and using the determined AMF as the first AMF capable of being served by the UE.

And after determining a first AMF capable of serving the UE, forwarding the received message carrying the GUTI information and the identification information of the UE, which are sent by the UE, to the first AMF. The identification information of the UE may be, for example, an International Mobile Subscriber Identity (IMSI), but is not limited thereto as long as the UE can be uniquely identified.

After receiving the message carrying the first GUTI information and the identification information of the UE sent by the base station, the first AMF may identify whether the UE context information is stored in itself, and if the UE context information is not stored, according to a first ID of a first AMF GROUP carried in the first GUTI information, obtain the UE context information from a sharing network element in a first AMF GROUP corresponding to the first ID, and send the message carrying the first GUTI information forwarded by the base station to a corresponding core network side device.

If the base station determines that the AMF capable of serving the UE is stored, it indicates that the AMF stores the context information of the UE, and the AMF is located in a second AMF GROUP accessed by the base station, the base station may directly forward the message carrying the first GUTI information and the UE identification information sent by the UE to the stored AMF serving the UE, so that the AMF directly sends the message carrying the first GUTI information to the corresponding core network side device.

In the embodiment of the present invention, the shared network element in the AMF GROUP stores the context information of the UE, and when the AMF serving the UE changes, the first AMF capable of serving the UE determined by the base station may acquire the context information of the UE from the shared network element without the need of reattaching the UE to the first AMF. In addition, the GUTI information contains the ID of the AMF GROUP and does not contain the AMF ID, when the base station sends the message carrying the GUTI information to the determined first AMF capable of serving the UE, the first AMF only needs to judge whether the AMF GROUP ID is the same as the ID stored by the first AMF, and does not need to judge whether the AMF ID is the same, so that when the AMF capable of serving the UE is changed in the AMF GROUP, the new AMF does not redistribute the GUTI information to the UE, the change of the AMF in the AMF GROUP does not cause the UE to sense, the signaling interaction among the UE, the base station and the AMF is reduced, and the viscosity between the UE and a core network is reduced.

Example 2:

on the basis of embodiment 1 above, in this embodiment of the present invention, the determining whether or not the AMF capable of serving the UE is stored includes:

judging whether a second AMF corresponding to the mobile terminal is stored;

In the embodiment of the present invention, for each UE, after determining the AMF capable of serving the UE, the base station stores the correspondence between the UE and the AMF, that is, stores the AMF corresponding to the UE.

When determining whether the AMF capable of serving the UE is stored, the base station firstly judges whether the base station stores a second AMF corresponding to the UE, if the second AMF corresponding to the UE is not stored, the base station does not indicate that the base station does not store the AMF which is determined to serve the UE, and the base station determines that the AMF capable of serving the UE is not stored. If the base station stores the second AMF corresponding to the UE, it indicates that the base station has determined the AMF that is served by the UE to the UE, but it is uncertain whether the second AMF corresponding to the UE can currently serve the UE, and it is further necessary to determine whether the second AMF can serve the UE, if the second AMF cannot serve the UE, it is determined that the AMF that can serve the UE is not stored, and if the second AMF can serve the UE, it is determined that the AMF that can serve the UE is stored, and the AMF that can serve the UE is the second AMF.

If the second AMF corresponding to the UE is not stored in the base station, it can be understood that the change of the AMF serving for the UE is a change across the AMF GROUP, and the AMF previously serving for the UE is not located in the second AMF GROUP accessed by the base station.

If the second AMF corresponding to the UE is stored in the base station, it can be understood that the change of the AMF serving for the UE is a change in the AMF GROUP, and the AMF previously serving for the UE is located in the second AMF GROUP accessed by the base station.

When determining whether the second AMF can serve the UE, specifically, the following may be performed:

The AMF may not be able to serve the UE, possibly because the AMF fails, that is, is in an abnormal state, or may not fail, and only because of some reasons, the UE is not to be served.

Therefore, when determining whether the second AMF can serve the UE, it needs to determine whether a message sent by the second AMF to stop serving the UE is received, and determine whether the second AMF is in an abnormal state;

if a message to stop serving the UE is received, it is determined that the second AMF cannot serve the UE, that is, it is determined that the AMF capable of serving the UE is not saved. If the AMF is in an abnormal state, it is determined that the second AMF cannot serve the UE, that is, it is determined that the AMF capable of serving the UE is not saved. And determining that the second AMF can serve the UE only if a message sent by the second AMF to stop serving the UE is not received and the second AMF is not in an abnormal state, that is, determining that the AMF capable of serving the UE is stored, where the AMF capable of serving the UE is the second AMF. The process of identifying whether the AMF device is in the abnormal state by the base station belongs to the prior art, and is not described in detail in the embodiment of the present invention.

Example 3:

in order to improve the performance of the determined AMF serving the UE, on the basis of the foregoing embodiments, in an embodiment of the present invention, the determining, according to a pre-saving method, a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the UE includes:

In the embodiment of the present invention, the method for determining the AMF serving the UE, which is pre-stored in the base station, may be a load balancing method. When determining the first AMF capable of serving the UE, specifically, load information of each AMF in the second AMF GROUP to which the UE is accessed is identified, and the first AMF capable of serving the UE is determined in the second AMF GROUP according to the load information of each AMF. The first AMF capable of serving the UE is provided with the condition that a message which is sent by the first AMF and stops serving the UE is not received, and the first AMF is in a normal state.

When the first AMF capable of serving the UE is determined in the second AMF GROUP, if the second AMF GROUP ID accessed by the base station is the same as the first AMF GROUP ID in the first GUTI information, the determined first AMF should be in a normal state, and the base station has not received the message sent by the first AMF to stop serving the UE. And if the second AMF GROUPID accessed by the base station is different from the first AMF GROUP ID in the first GUTI information, the determined first AMF is in a normal state.

When determining the first AMF capable of serving the UE in the second AMF GROUP according to the load information of each AMF, selecting the AMF with the smallest current load as the first AMF capable of serving the UE, and if the AMF with the smallest load is in an abnormal state and/or receives a message sent by the AMF to stop serving the UE, selecting the AMF with a smaller load and meeting the above conditions as the first AMF capable of serving the UE.

In the embodiment of the present invention, the base station may actively modify the scaling factor corresponding to each AMF in the second AMF GROUP to which the base station is accessed, and when the AMF capable of serving the UE is not stored, determine the first AMF capable of serving the UE in the second AMF GROUP according to the scaling factor corresponding to the load to which each AMF has been accessed. The process of modifying the scale factor corresponding to the AMF by the base station belongs to the prior art, and is not described in detail in the embodiment of the present invention.

Example 4:

in order to ensure that whether the AMF capable of serving the UE is stored can be accurately determined subsequently, on the basis of the foregoing embodiments, in an embodiment of the present invention, after determining the first AMF capable of serving the mobile terminal, the method further includes:

In the embodiment of the present invention, the base station may store the AMF corresponding to the UE, or may not store the AMF corresponding to the UE, and after determining the first AMF capable of serving the UE, when updating the AMF corresponding to the UE, if the AMF corresponding to the UE is not stored, the AMF corresponding to the UE, that is, the first AMF is stored, and if the AMF corresponding to the UE is stored, the stored AMF is updated to the first AMF, that is, the stored AMF is updated by using the first AMF.

Example 5:

on the basis of the above embodiments, in the embodiment of the present invention, to make GUTI information carried by the UE when sending a message more accurate and reduce signaling interaction at the UE, the base station, and the core network side, the method further includes:

In the embodiment of the present invention, after a base station forwards a message carrying first GUTI information and identification information of the UE, which are sent by the UE, to a first AMF which is determined to be capable of serving the UE, the first AMF may determine whether a first AMF GROUP ID carried in the first GUTI information is the same as a second AMF GROUP ID of a second AMF GROUP which is accessed by the first AMF GROUP, if the first AMF and the second AMF GROUP ID are different, it indicates that a change of the AMF serving the UE is a change across the AMF GROUP, and then sends a reallocation instruction carrying the identification information of the UE and the second GUTI information to the base station, where the second GUTI information includes the second AMF GROUP ID.

And the base station receives a reallocation instruction which is sent by the first AMF and carries the identification information of the UE and second GUTI information, sends the reallocation instruction to the UE, so that the UE updates the first GUTI information stored by the UE according to the second GUTI information, and when the UE updates and sends a message to the core network side through the base station again, the AMF GROUP ID in the carried GUTI information is the second ID of the second AMF GROUP accessed by the first AMF. The second AMF GROUP accessed by the first AMF is the same as the AMF GROUP accessed by the base station.

Example 6:

fig. 2 provides a schematic diagram of a data transmission process in embodiment 6, where the process includes the following steps:

s201: receiving identification information of a mobile terminal and a message carrying first GUTI information sent by a base station, wherein the first GUTI information comprises a first identity identification information ID of a first AMF GROUP GROUP corresponding to the mobile terminal and does not comprise an AMF ID, and the base station forwards the message and the identification information of the mobile terminal to the AMF after determining that the AMF capable of serving the mobile terminal is not stored in the AMF GROUP accessed by the base station according to a pre-stored method.

S202: and obtaining the context information of the mobile terminal from a first shared network element in a first AMF GROUP corresponding to the first ID, and sending the message sent by the base station to corresponding core network side equipment.

The data transmission method provided by the embodiment of the invention is applied to AMF equipment.

After receiving a message carrying the first GUTI information sent by the UE, the base station judges whether AMF capable of serving the UE is stored. If the base station determines that the AMF capable of serving the UE is not stored in the base station, the AMF capable of serving the UE is determined in a second AMF GROUP accessed to the base station according to a preset method, such as a load balancing method, and then the received message carrying the first GUTI information and the identification information of the UE, which are sent by the UE, are forwarded to the AMF. Since the base station determines the AMF that can serve the UE and sends a message to the AMF, the AMF is the same as the AMF GROUP accessed by the base station, and the ID of the AMF GROUP is also the same.

Each AMF GROUP includes at least one sharing network element, and the sharing network element stores context information attributed to each UE served by each AMF in the AMF GROUP, that is, the UE whose ID of the AMF GROUP in the GUTI information carried by the UE when sending the message is the same as the ID of the AMF GROUP. The context information of the UE stored in each sharing network element is the same, and a plurality of sharing network elements may be in a master-slave relationship. The AMF stores the priorities of a plurality of shared network elements, when acquiring the context information of the UE, the AMF with the highest priority is firstly acquired with the context information of the UE, and if the AMF is abnormal, the AMF acquires the context information of the UE from other AMFs according to the priority of each AMF.

After receiving the message carrying the first GUTI information and the identification information of the UE, the AMF identifies whether the UE context information is stored, if the UE context information is not stored, the AMF acquires the UE context information according to a first shared network element in a first AMF GROUP corresponding to a first ID carried in the first GUTI information, and sends the message carrying the first GUTI information forwarded by the base station to corresponding core network side equipment. The first ID is the first AMF GROUP ID.

In the embodiment of the present invention, the context information of the UE is stored in the shared network element in the AMF GROUP, when the AMF serving the UE changes, the first AMF capable of serving the UE determined by the base station may acquire the context information of the UE from the shared network element without the UE being reattached to the first AMF, and the GUTI information only includes the ID of the AMF GROUP.

Example 7:

on the basis of the foregoing embodiment 6, in an embodiment of the present invention, the acquiring, from the first shared network element in the first AMF GROUP corresponding to the first ID, the context information of the mobile terminal includes:

In the embodiment of the present invention, the second ID of the second AMF GROUP accessed by the AMF may be the same as or different from the first ID of the first AMF GROUP. If the same, the change of the AMF serving the UE is described as a change within the AMF GROUP, and if different, the change of the AMF serving the UE is described as a change across the AMF GROUP. Whether the UE context information is the same or not, the UE context information is stored in a first shared network element, where the first shared network element is a shared network element of a first AMF GROUP corresponding to a first ID included in first GUTI information carried by the UE when the UE sends a message. The AMF needs to acquire the context information of the UE from the first shared network element in the first AMF GROUP.

When acquiring the context information of the UE, specifically, it may be determined whether a second ID of a second AMF GROUP accessed by the UE is the same as the first ID, if so, sending a context information acquisition request carrying identification information of the UE to a first shared network element in a first AMF GROUP corresponding to the first ID, and receiving the context information of the UE returned by the first shared network element; if not, acquiring the context information of the UE in the first sharing network element in the first AMF GROUP corresponding to the first ID through a second sharing network element in a second AMF GROUP accessed by the UE, and receiving the context information of the UE returned by the second sharing network element. The second sharing network element is a sharing network element in the second AMF GROUP that can perform data transmission with the sharing network elements in the other AMF GROUPs, and the sharing network element in the AMF GROUP that can perform data transmission with the sharing network elements in the other AMF GROUPs is hereinafter referred to as an interactive sharing network element for short. The AMF stores the identification information of the second sharing network element accessed to the second AMF GROUP, for example, the IP address of the sharing network element. One or more inter-sharing network elements in each AMF GROUP may be provided, and preferably, one inter-sharing network element is provided to avoid data transmission problems.

When the context information of the UE in the first sharing network element is acquired through the second sharing network element, specifically, the AMF sends a context information acquisition request carrying the identification information of the UE and the first AMF GROUP ID to a second sharing network element in a second AMF GROUP to which the AMF is accessed, so that the second sharing network element acquires the identification information of the UE to a first sharing network element in the first AMF GROUP corresponding to the first AMF GROUP ID, and receives the context information of the UE returned by the second sharing network element.

The second sharing network element stores the identification information of the interactive sharing network element in each AMF GROUP, for example, the IP address of the sharing network element. And if the first sharing network element is also the interactive sharing network element, the second sharing network element sends a context information acquisition request carrying the identification information of the UE to the first sharing network element, otherwise, the second sharing network element sends the context information acquisition request carrying the identification information of the UE to the interactive sharing network element in the first AMF GROUP, so that the second sharing network element acquires the context information of the UE from the first sharing network element and sends the acquired context information of the UE to the second sharing network element, and the second sharing network element sends the context information of the UE to the AMF.

In order to ensure accuracy, when receiving the context information acquisition request sent by the AMF, the second sharing network element may determine again whether the second ID is the same as the first ID, and if the second ID is different from the first ID, acquire the identification information of the UE from the first sharing network element in the first AMF GROUP corresponding to the first ID, and after receiving the context information of the UE returned by the first sharing network element, the second sharing network element sends the context information to the AMF.

As shown in the schematic diagram of the system architecture shown in fig. 3, the shared network element is located in the data layer, the AMF belongs to the service layer, the base station belongs to the access layer, and the IDs of the base station and the AMF GROUP accessed by the AMF are the same. The AMF GROUP includes three AMFs (AMF1, AMF 2. AMF 3). When the change of the AMF serving the UE changes within the AMF GROUP, which was serving the UE as AMF1, the UE sends a message carrying GUTI information carrying the AMF GROUP ID to the base station. The base station judges that the AMF which is not stored for serving the UE per se is not stored in the base station, the AMF3 serving the UE is determined in the AMF GROUP accessed per se through load balancing, the base station forwards a message sent by the UE and identification information of the UE to the AMF3, the AMF3 judges that the AMF GROUP IDs are the same, obtains context information of the UE from a shared network element in the AMF GROUP accessed per se, and sends the message sent by the base station to corresponding core network side equipment.

Fig. 4 is a schematic system architecture diagram, where AMF GROUP1 includes two AMFs (AMF1 and AMF2), which may be AMF1 or AMF2 for serving the UE, and whether AMF1 or AMF2, the change of the AMF for serving the UE changes across AMF GROUP, the context information of the UE is stored in shared network element 1 in AMF GROUP1, the UE is moved from base station 1 to base station 3, and the UE sends a message carrying GUTI information to base station 3, where the GUTI information carries AMF GROUP ID 1. The base station judges that the AMF which is not stored for serving the UE per se is not stored as the AMF3 serving the UE per se, the base station 3 forwards a message sent by the UE and identification information of the UE to the AMF3 through load balancing, the AMF3 judges that the ID1 of the AMF GROUP is different from the ID stored per se, the base station sends a context information acquisition request carrying the identification information and the ID1 of the UE to a shared network element 2 in the AMF GROUP 2 accessed per se, the shared network element 2 acquires the context information of the UE to a shared network element 1 in the ID1 and sends the acquired context information of the UE to the AMF3, and the AMF3 sends the message sent by the base station 3 to corresponding core network side equipment.

Example 8:

in order to make GUTI information carried by the UE when sending a message more accurate and reduce signaling interaction at the UE, the base station and the core network side, on the basis of the foregoing embodiments 6 and 7, in an embodiment of the present invention, if a second ID of a second AMF GROUP accessed by the UE is different from the first ID, the method further includes:

and sending a reallocation instruction carrying the identification information of the UE and second GUTI information to the base station, so that the base station sends the reallocation instruction to the UE, and the mobile terminal updates the first GUTI information stored by the mobile terminal according to the second GUTI information, wherein the second GUTI information comprises the second ID and does not comprise AMF ID.

In the embodiment of the present invention, after the base station forwards the message carrying the first GUTI information and the identification information of the UE sent by the UE to the first AMF determined to be capable of serving the UE, the first AMF may determine whether the first ID of the first AMF GROUP carried in the first GUTI information is the same as the second ID of the second AMF GROUP accessed by the first AMF GROUP, if so, it indicates that the change of the AMF serving the UE is a change across the AMF GROUPs, and then sends a reallocation instruction carrying the identification information of the UE and the second GUTI information to the base station, where the second GUTI information includes the second ID.

And the base station receives a reallocation instruction which is sent by the AMF and carries the identification information of the UE and second GUTI information, the reallocation instruction is sent to the UE, the UE updates the first GUTI information stored by the UE according to the second GUTI information, and when the UE updates and sends a message to the core network side through the base station again, the ID of the AMF GROUP in the carried GUTI information is the second ID of the second AMF GROUP accessed by the first AMF. The second AMF GROUP accessed by the first AMF is the same as the AMF GROUP accessed by the base station.

Example 9:

fig. 5 is a structural diagram of a data transmission device according to embodiment 9 of the present invention, which is applied to a base station, and the device includes:

a receiving module 51, configured to receive a message that is sent by a mobile terminal and carries first GUTI information, where the first GUTI information includes a first ID of a first AMF GROUP corresponding to the mobile terminal and does not include an AMF ID;

a determining module 52, configured to determine whether an AMF capable of serving the mobile terminal is stored;

a determining module 53, configured to determine, according to a pre-stored method, a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the determining module according to a pre-stored method if the determination result of the determining module 52 is negative;

a sending module 54, configured to forward the message and the identifier information of the mobile terminal to the first AMF, so that the first AMF obtains context information of the mobile terminal from a shared network element in a first AMF GROUP corresponding to the first ID, and then sends the message to a corresponding core network side device.

Example 10:

fig. 6 is a structural diagram of a data transmission device according to embodiment 10 of the present invention, which is applied to an AMF, and the data transmission device includes:

a receiving module 61, configured to receive identifier information of a mobile terminal and a message carrying GUTI information sent by a base station, where the GUTI information includes a first ID of a first AMF GROUP corresponding to the mobile terminal and does not include an AMF ID, and the base station forwards the message and the identifier information of the mobile terminal to an AMF after determining that an AMF capable of serving the mobile terminal is not stored in the base station and determining, according to a pre-storage method, an AMF capable of serving the mobile terminal in an AMF GROUP accessed by the base station, to the AMF;

a sending module 62, configured to obtain the context information of the mobile terminal from the first shared network element in the first AMF GROUP corresponding to the first ID, and send the message sent by the base station to the corresponding core network side device.

Example 11:

on the basis of the foregoing embodiments, based on the same inventive concept, the embodiments of the present invention further provide a base station, and since the principle of solving the problem of the base station is similar to the data transmission method, the implementation of the base station in the embodiments may refer to the implementation of the method, and repeated details are not repeated.

Fig. 7 is a base station provided in embodiment 11 of the present invention, where the base station includes: memory 72, processor 71 and transceiver 73;

in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 71 and various circuits of memory represented by memory 72 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The transceiver 73 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 71 is responsible for managing the bus architecture and general processing, and the memory 72 may store data used by the processor 71 in performing operations.

Alternatively, the processor 71 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

The transceiver 73 is configured to receive, under the control of the processor 71, a message that is sent by a mobile terminal and carries first GUTI information, where the first GUTI information includes a first ID of a first AMF GROUP corresponding to the mobile terminal and does not include an AMF ID;

the processor 71 is configured to read the program in the memory 72, and execute the following processes: determining whether an AMF capable of serving the mobile terminal is stored; if not, determining a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the mobile terminal according to a pre-stored method;

the transceiver 73 is configured to forward the message and the identifier information of the mobile terminal to the first AMF under the control of the processor 71, so that the first AMF obtains context information of the mobile terminal from a shared network element in a first AMF GROUP corresponding to the first ID, and then sends the message to a corresponding core network side device.

The processor 71 is specifically configured to determine whether a second AMF corresponding to the mobile terminal is stored; if not, determining that the AMF capable of serving the mobile terminal is not stored; if so, judging whether the second AMF can serve the mobile terminal, if not, determining that the AMF which can serve the mobile terminal is not stored, otherwise, determining that the AMF which can serve the mobile terminal is stored.

The processor 71 is specifically configured to determine whether a message sent by the second AMF and used for stopping serving the mobile terminal is received, and determine whether the second AMF is in an abnormal state; and if at least one judgment result is yes, determining that the AMF capable of serving the mobile terminal is not stored, and if both the judgment results are no, determining that the AMF capable of serving the mobile terminal is stored.

The processor 71 is specifically configured to identify load information of each AMF in the second AMF GROUP to which the processor is connected; and determining a first AMF capable of serving the mobile terminal in the second AMF GROUP according to the load information of each AMF.

The processor 71 is further configured to update, for the mobile terminal, an AMF corresponding to the mobile terminal.

The transceiver 73 is further configured to receive, under the control of the processor 71, a reallocation instruction that is sent by the first AMF and carries the identification information of the mobile terminal and second GUTI information, and send the reallocation instruction to the mobile terminal, so that the mobile terminal updates, according to the second GUTI information, the first GUTI information stored by the mobile terminal itself, where the second GUTI information includes the second ID of the second AMF GROUP and does not include the AMF ID, and the reallocation instruction is sent by the first AMF device when it is determined that the second ID of the second AMF GROUP to which the first AMF device is connected is different from the first ID.

Example 12:

based on the above embodiments, based on the same inventive concept, an authentication management function entity AMF is also provided in the embodiments of the present invention, and because the principle of the AMF for solving the problem is similar to the data transmission method, the implementation of the AMF in the embodiments may refer to the implementation of the method, and repeated details are not described again.

Fig. 8 is an authentication management functional entity AMF provided in embodiment 12 of the present invention, where the AMF includes: a memory 82, a processor 81, and a transceiver 83;

in fig. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 81 and various circuits of memory represented by memory 82 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The transceiver 83 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 81 is responsible for managing the bus architecture and general processing, and the memory 82 may store data used by the processor 81 in performing operations.

Alternatively, the processor 81 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

The processor 81 is configured to read the computer program stored in the memory 82, and execute the following processes:

controlling the transceiver 83, receiving identification information of a mobile terminal and a message carrying first GUTI information sent by a base station, where the first GUTI information includes a first ID of a first AMF GROUP corresponding to the mobile terminal and does not include an AMF ID, and after determining that an AMF capable of serving the mobile terminal is not stored in the base station, determining an AMF capable of serving the mobile terminal in an AMF GROUP accessed by the base station according to a pre-stored method, forwarding the message and the identification information of the mobile terminal to the AMF;

and controls the transceiver 83 to acquire the context information of the mobile terminal from the first shared network element in the first AMF GROUP corresponding to the first ID, and sends the message sent by the base station to the corresponding core network side device.

The processor 81 is specifically configured to determine whether a second ID of a second AMF GROUP accessed by the processor is the same as the first ID; if the determination result is yes, the processor 81 controls the transceiver 83 to send a context information acquisition request carrying the identification information of the mobile terminal to a first shared network element in a first AMF GROUP corresponding to the first ID, and receives the context information of the mobile terminal returned by the first shared network element; if the determination result is negative, the processor 81 controls the transceiver 83 to obtain the context information of the mobile terminal in the first sharing network element in the first AMF GROUP corresponding to the first ID through the second sharing network element in the second AMF GROUP to which the transceiver is accessed, and receives the context information of the mobile terminal returned by the second sharing network element.

If the processor 81 determines that the second ID of the second AMF GROUP accessed by the mobile terminal is different from the first ID, the transceiver 83 is further configured to send a redistribution instruction carrying the identification information of the mobile terminal and the second GUTI information to the base station under the control of the processor 81, so that the base station sends the redistribution instruction to the mobile terminal, and the mobile terminal updates the first GUTI information stored by the mobile terminal according to the second GUTI information, where the second GUTI information includes the second ID and does not include the AMF ID.

Example 13:

fig. 9 is a structural diagram of a data transmission system according to embodiment 13 of the present invention, where the system includes a base station 91 and an authentication management function entity 92.

Example 14:

fig. 10 is a base station provided in embodiment 14 of the present invention, including: the system comprises a processor 11, a communication interface 12, a memory 13 and a communication bus 14, wherein the processor 11, the communication interface 12 and the memory 13 are communicated with each other through the communication bus 14;

the memory 13 has stored therein a computer program which, when executed by the processor 11, causes the processor 11 to perform the steps of:

receiving a message which is sent by a mobile terminal and carries first GUTI information, wherein the first GUTI information comprises a first ID of a first AMF GROUP corresponding to the mobile terminal and does not comprise an AMF ID;

determining whether an AMF capable of serving the mobile terminal is stored;

The communication bus mentioned in the base station may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.

A communication interface 12 for communication between the base station and other devices.

The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.

The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like.

Example 15:

fig. 11 is an authentication management functional entity AMF according to embodiment 15 of the present invention, which includes: the system comprises a processor 21, a communication interface 22, a memory 23 and a communication bus 24, wherein the processor 21, the communication interface 22 and the memory 23 are communicated with each other through the communication bus 24;

the memory 23 has stored therein a computer program which, when executed by the processor 21, causes the processor 21 to perform the steps of:

receiving a message which is sent by a base station and carries first GUTI information and identification information of a mobile terminal, wherein the first GUTI information comprises a first ID of a first AMF GROUP corresponding to the mobile terminal and does not comprise an AMF ID, the base station determines that AMF which can serve the mobile terminal is not stored, and forwards the message and the identification information of the mobile terminal to the AMF after determining the AMF which can serve the mobile terminal in the self-accessed AMF GROUP according to a pre-stored method;

The communication bus mentioned in the AMF may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.

A communication interface 22 for communication between the AMF and other devices.

Example 16:

embodiment 16 of the present invention provides a computer-readable storage medium storing a computer program executable by a base station, and when the program runs on the base station, causes the base station to execute the following steps:

determining whether an AMF capable of serving the mobile terminal is stored;

The computer readable storage medium may be any available media or data storage device that can be accessed by the processor in the base station, including but not limited to magnetic memory such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MO), etc., optical memory such as CDs, DVDs, BDs, HVDs, etc., and semiconductor memory such as ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs), etc.

Example 17:

an embodiment 17 of the present invention provides a computer-readable storage medium, which stores a computer program executable by an authentication management function entity AMF, and when the program runs on the AMF, the AMF is caused to perform the following steps:

receiving identification information of a mobile terminal and a message carrying first GUTI information sent by a base station, wherein the first GUTI information comprises a first ID of a first AMF GROUP corresponding to the mobile terminal and does not comprise an AMF ID, the base station determines that AMF capable of serving the mobile terminal is not stored, and forwards the message and the identification information of the mobile terminal to the AMF after determining that AMF capable of serving the mobile terminal is stored in the AMF GROUP accessed by the base station according to a pre-stored method;

The computer readable storage medium may be any available media or data storage device that can be accessed by the processor in the AMF, including, but not limited to, magnetic memory such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc., optical memory such as CDs, DVDs, BDs, HVDs, etc., and semiconductor memory such as ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs), etc.

The embodiment of the invention discloses a data transmission method, a device, a system, a base station, an AMF and a medium, wherein the method comprises the following steps: receiving a message which is sent by a mobile terminal and carries first GUTI information, wherein the first GUTI information comprises a first ID of a first AMF GROUP corresponding to the mobile terminal and does not comprise an AMF ID; determining whether an AMF capable of serving the mobile terminal is stored; if not, according to a pre-stored method, determining a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by the mobile terminal, and forwarding the message and the identification information of the mobile terminal to the first AMF, so that the first AMF acquires the context information of the mobile terminal from a shared network element in the first AMF GROUP corresponding to the first ID, and then sends the message to corresponding core network side equipment. In the embodiment of the present invention, the context information of the UE is stored in the shared network element in the AMF GROUP, when the AMF serving the UE changes, the first AMF capable of serving the UE determined by the base station may acquire the context information of the UE from the shared network element without the UE being reattached to the first AMF, and the GUTI information only includes the ID of the AMF GROUP.

For the system/apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.

It is to be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely application embodiment, or an embodiment combining application and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

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.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the 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 spirit and 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 intended to include such modifications and variations as well.

Claims

1. A data transmission method, applied to a base station, the method comprising:

determining whether an AMF capable of serving the mobile terminal is stored;

2. The method of claim 1, wherein the determining whether an AMF capable of serving the mobile terminal is stored comprises:

judging whether a second AMF corresponding to the mobile terminal is stored;

3. The method of claim 2, wherein the determining whether the second AMF can serve the mobile terminal comprises:

4. The method of any of claims 1-3, wherein the determining, according to a pre-saved method, a first AMF capable of serving the mobile terminal in a second AMF GROUP accessed by itself comprises:

5. A method according to any of claims 1-3, wherein after determining the first AMF capable of serving the mobile terminal, the method further comprises:

6. The method of any one of claims 1-3, further comprising:

7. A data transmission method, applied to an authentication management function entity AMF, the method comprising:

8. The method of claim 7, wherein the obtaining the context information of the mobile terminal from the first shared network element in the first AMF GROUP corresponding to the first ID comprises:

9. The method of claim 8, wherein if the second ID of the self-accessed second AMF GROUP is different from the first ID, the method further comprises:

10. A data transmission apparatus, applied to a base station, the apparatus comprising:

11. A data transmission apparatus, applied to an authentication management function entity AMF, the apparatus comprising:

12. A base station, characterized in that the base station comprises: a memory, a processor, and a transceiver;

13. The base station of claim 12, wherein the processor is specifically configured to determine whether a second AMF corresponding to the mobile terminal is stored; if not, determining that the AMF capable of serving the mobile terminal is not stored; if so, judging whether the second AMF can serve the mobile terminal, if not, determining that the AMF which can serve the mobile terminal is not stored, otherwise, determining that the AMF which can serve the mobile terminal is stored.

14. The base station of claim 13, wherein the processor is specifically configured to determine whether a message sent by the second AMF to stop serving the mobile terminal is received, and determine whether the second AMF is in an abnormal state; and if at least one judgment result is yes, determining that the AMF capable of serving the mobile terminal is not stored, and if both the judgment results are no, determining that the AMF capable of serving the mobile terminal is stored.

15. The base station according to any of claims 12 to 14, wherein the processor is specifically configured to identify load information of each AMF in the second AMF GROUP to which the processor has access; and determining a first AMF capable of serving the mobile terminal in the second AMF GROUP according to the load information of each AMF.

16. The base station of any of claims 12-14, wherein the processor is further configured to update, for the mobile terminal, the AMF corresponding to the mobile terminal.

17. The base station of any one of claims 12 to 14, wherein the transceiver is further configured to receive, under the control of the processor, a reallocation instruction that is sent by the first AMF and carries identification information of the mobile terminal and second GUTI information, send the reallocation instruction to the mobile terminal, and cause the mobile terminal to update the first GUTI information stored by the mobile terminal according to the second GUTI information, where the second GUTI information includes the second ID of the second AMF GROUP and does not include the AMF ID, and the reallocation instruction is sent by the first AMF device when determining that the second ID of the second AMF GROUP accessed by the first AMF device is different from the first ID.

18. An authentication management function, AMF, comprising: a memory, a processor, and a transceiver;

19. The AMF of claim 18, wherein the processor is specifically configured to determine whether a second ID of a second AMF GROUP to which the processor is connected is the same as the first ID; if the judgment result is yes, the processor controls the transceiver to send a context information acquisition request carrying the identification information of the mobile terminal to a first shared network element in a first AMF GROUP corresponding to the first ID, and receives the context information of the mobile terminal returned by the first shared network element; if not, the processor controls the transceiver to acquire the context information of the mobile terminal in the first sharing network element in the first AMF GROUP corresponding to the first ID through a second sharing network element in a second AMF GROUP accessed by the transceiver, and receives the context information of the mobile terminal returned by the second sharing network element.

20. The AMF of claim 19, wherein if the processor determines that the second ID of the second AMF GROUP accessed by the processor is different from the first ID, the transceiver is further configured to send, under the control of the processor, a re-allocation instruction carrying the identification information of the mobile terminal and second GUTI information to the base station, so that the base station sends the re-allocation instruction to the mobile terminal, so that the mobile terminal updates the first GUTI information stored by the mobile terminal according to the second GUTI information, wherein the second GUTI information includes the second ID and does not include the AMF ID.

21. A data transmission system, characterized in that the system comprises a base station according to any of claims 12-17 and an authentication management function, AMF, according to any of claims 18-20.

22. A base station, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

the memory has stored therein a computer program which, when executed by the processor, causes the processor to carry out the steps of the method of any one of claims 1-6.

23. An authentication management function, AMF, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

the memory has stored therein a computer program which, when executed by the processor, causes the processor to carry out the steps of the method of any one of claims 7-9.

24. A computer-readable storage medium, characterized in that it stores a computer program executable by a base station, which program, when run on the base station, causes the base station to perform the steps of the method of any of claims 1-6.

25. A computer-readable storage medium, characterized in that it stores a computer program executable by an authentication management function entity, AMF, which, when said program is run on said AMF, causes said AMF to perform the steps of the method according to any one of claims 7-9.