CN117320094B

CN117320094B - Space core network switching method and device, electronic equipment and storage medium

Info

Publication number: CN117320094B
Application number: CN202311609833.3A
Authority: CN
Inventors: 张铭晗; 徐晓帆; 杜平; 陈希; 赵逸群
Original assignee: Shanghai Satellite Internet Research Institute Co ltd
Current assignee: Shanghai Satellite Internet Research Institute Co ltd
Priority date: 2023-11-29
Filing date: 2023-11-29
Publication date: 2024-03-08
Anticipated expiration: 2043-11-29
Also published as: CN117320094A

Abstract

The embodiment of the invention provides a method, a device, electronic equipment and a storage medium for switching a space core network, which relate to the technical field of space communication and are applied to a target core network element, wherein the method comprises the following steps: receiving a service request message of a terminal; sending a context acquisition message for acquiring context information of the terminal to a source core network element, wherein the source core network element is a core network element currently connected with the terminal; and receiving the context information and executing a core network switching flow aiming at the terminal. The scheme provided by the embodiment of the invention can reduce the consumption of operation resources caused by the switching between the space core network and the terminal.

Description

Space core network switching method and device, electronic equipment and storage medium

Technical Field

The embodiment of the invention relates to the technical field of space communication, in particular to a space core network switching method, a device, electronic equipment and a storage medium.

Background

At present, the ground 5G (5 th Generation Mobile Communication Technology, fifth-generation mobile communication technology) has realized a low-delay, large-scale access and high-reliability communication scene, but in remote areas such as deserts, oceans, polar regions and the like, and in a three-dimensional airspace, good signal coverage cannot be realized, and the large-scale spatial communication network is favored by people due to the characteristics of short transmission delay, low path loss, high stability, wide signal coverage, no region limitation and the like.

In the current large-scale space communication network networking mode, in order to solve the problem that the link performance is bottleneck due to single ground and space link channels and too frequent signaling messages, people begin to research and convert a pure ground deployment core network into ground and space cooperative deployment and a space core network. In the existing space core network research scheme, part of network elements of a core network are deployed on space nodes, for example, three basic network elements are deployed on the space nodes: AMF (Access and Mobile Management Function, access and mobility management function), SMF (Session Management Function ), UPF (User Plane Function, user plane function), signaling processing between core network and base station can be directly forwarded by inter-satellite link without transmission via feeder link between ground and space, which can solve the bottleneck problem.

However, after the base station and the core network are deployed on the spatial node, the switching between the spatial core network and the terminal is often performed due to the high-speed movement characteristic of the spatial node, and the related technology consumes more computing resources in the switching process between the spatial core network and the terminal.

Disclosure of Invention

An embodiment of the invention aims to provide a method, a device, electronic equipment and a storage medium for switching a space core network, so as to reduce the consumption of operation resources caused by switching between the space core network and a terminal. The specific technical scheme is as follows:

in a first aspect, an embodiment of the present invention provides a method for switching a spatial core network, which is applied to a target core network element, where the method includes:

receiving a service request message of a terminal;

sending a context acquisition message for acquiring context information of the terminal to a source core network element, wherein the source core network element is a core network element currently connected with the terminal;

and receiving the context information and executing a core network switching flow aiming at the terminal.

In one embodiment of the present invention, the method further includes:

if the core network switching flow aiming at the terminal is abnormal, registering aiming at the terminal;

and sending re-registration instruction information to the terminal.

In one embodiment of the present invention, after the receiving the service request message of the terminal, the method further includes:

judging whether the service type identifier carried by the service request message indicates to perform a fast switching process or not;

If yes, the step of sending a context acquisition message for acquiring the context information of the terminal to the source core network element is executed.

In one embodiment of the present invention, the target core network element and/or the source core network element are/is mounted on a spatial node.

In a second aspect, an embodiment of the present invention provides a method for switching a spatial core network, where the method is applied to a source core network element, and the method includes;

receiving a context acquisition message sent by a target core network element and indicating the context information of a terminal sent to the target core network element;

and sending the context information to the target core network element.

In one embodiment of the present invention, after the sending the context information to the target core network element, the method further includes:

and deleting the context information of the terminal.

In a third aspect, an embodiment of the present invention provides a method for switching a spatial core network, which is applied to a terminal, where the method includes:

under the condition that the core network switching condition is reached, sending a service request message, so that a target core network element sends a context acquisition message for acquiring the context information of the terminal to a source core network element based on the service request message, and after receiving the context information, executing a core network switching flow for the terminal; the source core network element is a core network element currently connected with the terminal.

In one embodiment of the present invention, the method further includes:

and after receiving the re-registration instruction information sent by the target core network element, re-registering the target core network element, wherein the re-registration instruction information is as follows: the target core network element is sent under the condition that the core network switching flow is abnormal.

In one embodiment of the present invention, the service request message carries a service type identifier, and the service type identifier indicates to perform a fast handover procedure, so that the target core network element performs the step of sending a context acquisition message for acquiring context information of the terminal to the source core network element after determining that the service type identifier indicates to perform the fast handover procedure.

In a fourth aspect, an embodiment of the present invention provides a spatial core network switching device, which is applied to a target core network element, where the device includes:

the first receiving module is used for receiving the service request message of the terminal;

a first sending module, configured to send a context acquisition message for acquiring context information of the terminal to a source core network element, where the source core network element is a core network element to which the terminal is currently connected;

And the receiving execution module is used for receiving the context information and executing a core network switching flow aiming at the terminal.

In one embodiment of the present invention, the apparatus further includes:

the registering module is used for registering the terminal if the switching flow of the core network for the terminal is abnormal;

and the fourth sending module is used for sending the re-registration indication information to the terminal.

In one embodiment of the present invention, the apparatus further includes:

and the judging module is used for judging whether the service type identifier carried by the service request message indicates to perform the fast switching process.

In a fifth aspect, an embodiment of the present invention provides a spatial core network switching device, applied to a source core network element, where the device includes:

a second receiving module, configured to receive a context acquisition message sent by a target core network element and indicating to send context information of a terminal to the target core network element;

and the second sending module is used for sending the context information to the target core network element.

In one embodiment of the present invention, the apparatus further includes:

And the deleting module is used for deleting the context information of the terminal.

In a sixth aspect, an embodiment of the present invention provides a spatial core network switching device, which is applied to a terminal, where the device includes:

a third sending module, configured to send a service request message when a core network handover condition is reached, so that a target core network element sends a context acquisition message for acquiring context information of a terminal to a source core network element based on the service request message, and after receiving the context information, the target core network element executes a core network handover procedure for the terminal; the source core network element is a core network element currently connected with the terminal.

In one embodiment of the present invention, the apparatus further includes:

and a re-registration module, configured to re-register with the target core network element after receiving re-registration instruction information sent by the target core network element, where the re-registration instruction information is: the target core network element is sent under the condition that the core network switching flow is abnormal.

In a seventh aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus;

a memory for storing a computer program;

a processor for implementing any of the method steps of the first or second or third aspects when executing a program stored on a memory.

In an eighth aspect, an embodiment of the present invention provides a computer readable storage medium having stored therein a computer program which, when executed by a processor, implements any of the method steps of the first or second or third aspects.

The embodiment of the invention has the beneficial effects that:

the embodiment of the invention provides a space core network switching method, which is applied to a target core network element, and comprises the following steps: receiving a service request message of a terminal; sending a context acquisition message for acquiring context information of the terminal to a source core network element, wherein the source core network element is a core network element currently connected with the terminal; and receiving the context information and executing a core network switching flow aiming at the terminal.

In the above, in the solution provided in the embodiment of the present invention, compared with the case that the related art involves more signaling interactions in order to obtain the context information of the terminal in the process of switching the spatial core network for the terminal, the target core network element in the embodiment of the present invention directly sends the context obtaining message to the source core network element currently connected to the terminal after receiving the service request message sent by the terminal and used for connecting the target core network, thereby obtaining the context information of the terminal, and then continues the core network switching procedure for the terminal until the switching is completed. The embodiment of the invention reduces the number of signaling interaction times required for acquiring the context information of the terminal, thereby reducing the total number of signaling interaction required by the terminal in the switching of the space core network, reducing the consumption of operation resources caused by the switching between the space core network and the terminal, and ensuring the data communication of the terminal in the switching process of the space core network to a greater extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention and other embodiments may be obtained according to the drawings for those skilled in the art.

Fig. 1 is a flow chart of a first method for switching a spatial core network according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of coverage of a spatial communication signal in the related art;

fig. 3 is a flow chart of a second method for switching a spatial core network according to an embodiment of the present invention;

fig. 4 is a flow chart of a third method for switching a spatial core network according to an embodiment of the present invention;

fig. 5 is a flow chart of a fourth method for switching a spatial core network according to an embodiment of the present invention;

fig. 6 is a schematic flow chart of signaling interaction in a space core network handover according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first spatial core network switching device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second spatial core network switching apparatus according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a first electronic device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second electronic device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a third electronic device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by the person skilled in the art based on the present invention are included in the scope of protection of the present invention.

In a terrestrial mobile communication system, the locations of the base station and the core network are basically fixed, mainly due to handover between the terminal and the base station, the core network, caused by movement of the terminal. In a spatial communication network, a base station and a core network are deployed on a spatial node, and high-frequency handover between the spatial core network and a terminal is caused due to the high-speed movement characteristic of the spatial node. In the related art, the switching between the spatial core network and the terminal consumes more computing resources.

In order to solve the above problems, embodiments of the present invention provide a method, an apparatus, an electronic device, and a storage medium for switching a spatial core network, which are specifically described below.

Firstly, a method for switching a spatial core network provided by the embodiment of the invention is described.

Referring to fig. 1, a flow chart of a first spatial core network handover method according to an embodiment of the present invention is provided, and the method is applied to a target core network element, and the method includes the following steps S101 to S103.

Step S101: and receiving a service request message of the terminal.

Referring to fig. 2, a schematic diagram of coverage of a spatial communication signal in the related art is shown. As can be seen from fig. 2, if the spatial node in fig. 2 is the same spatial node, signal coverage is performed on different areas at different positions, and the area covered by the spatial node signal changes along with the change of the spatial node position; if two different spatial nodes are shown in fig. 2, the spatial nodes at different positions perform signal coverage on different areas, and the signal coverage of the two spatial nodes at different positions may be partially overlapped.

Specifically, for the case where there are different spatial nodes, fig. 2 is merely an example, and in a practical situation, there may be three or more spatial nodes with partially overlapping signal coverage areas, that is, a terminal may receive communication signals of multiple spatial nodes at the same time. In the case where the terminal receives communication signals of a plurality of spatial nodes at the same time, since distances between different spatial nodes and the terminal may be different, the communication signal strengths of different spatial nodes received by the terminal may be different.

The terminal detects different core networks covering the current area of the terminal, determines whether the connected core network needs to be switched, specifically, the terminal determines whether the connected core network needs to be switched, and selects the switched connected core network as a related technology. The terminal determines that the signal strength of the core network is different from the signal strength of the core network, and if the signal strength of the core network is gradually reduced and the signal strength of the core network is gradually increased, the terminal determines that the condition of switching the core network is reached.

After the terminal judges that the condition of core network switching is reached, the terminal firstly judges the type of a mobile communication system accessed by the terminal, and if the mobile communication system is accessed to the terminal, the terminal performs core network switching aiming at the ground mobile communication system according to the related technology; if the space node mobile communication system is accessed, the terminal sends a service request message for connecting a target core network mounted on the space node, and the target core network element receives the service request message.

Step S102: and sending a context acquisition message for acquiring the context information of the terminal to the source core network element.

The source core network element is a core network element currently connected with the terminal.

In one embodiment of the present invention, after receiving the service request message, the target core network element directly sends the context acquisition message to the source core network element through the inter-satellite link, and after receiving the context acquisition message, the source core network element sends the context information of the terminal to the target core network element through the inter-satellite link, that is, in the embodiment of the present invention, only two times of sending of the message is required, so that the source core network element can send the context information of the terminal to the target core network element. In the related art, more signaling interactions are needed to enable the source core network element to send the context information of the terminal to the target core network element.

Step S103: and receiving the context information and executing a core network switching flow aiming at the terminal.

After receiving the context information of the terminal sent by the source core network element, the target core network element continues to execute the subsequent core network switching process for the terminal according to the 3GPP (3 rd Generation Partnership Project, third generation partnership project) standard, after the terminal is switched and connected to the target core network, the data link between the terminal and the target core network is activated, and after ensuring that the communication of the terminal is normal, the switching of the space core network connected with the terminal is completed.

In one embodiment of the present invention, the target core network element and/or the source core network element are/is carried on a spatial node, and the spatial node may be a satellite, that is, there are three situations:

(1) The target core network element is carried on the space node, and the source core network element is not carried on the space node;

(2) The target core network element is not mounted on the space node, and the source core network element is mounted on the space node;

(3) The target core network element and the source core network element are both carried on the space node.

In the process of switching the spatial core network connected to the terminal, abnormal conditions may occur to cause core network switching failure.

Step A: and if the core network switching flow aiming at the terminal is abnormal, registering aiming at the terminal.

If abnormal conditions occur in the process of switching the space core network to the terminal, which results in switching failure, the target core network element initiates the network side to register for the terminal, and terminates the current process of registering for the terminal in the target core network.

And (B) step (B): and sending re-registration instruction information to the terminal.

And after the target core network element finishes the de-registration of the network side of the terminal, sending re-registration indication information to the terminal. After the terminal receives the re-registration indication information and determines that the network side is completed to be de-registered, the terminal can switch the core network again according to the prior related technology or the scheme provided by the embodiment of the invention, connect the target core network and re-register the target core network.

As can be seen from the above, in the solution provided in the embodiment of the present invention, if the core network switching procedure for the terminal is abnormal, the target core network element performs deregistration for the terminal, and instructs the terminal to register again with the target core network element after deregistration. Under the condition that the terminal registers with the target core network element again, the target core network element carries out the registration flow aiming at the terminal again, so that the terminal can be ensured to successfully complete the switching of the core network as much as possible.

In one embodiment of the present invention, the following step C is further included after the step S101.

Step C: and judging whether the service type identifier carried by the service request message indicates to perform a fast switching process.

In the embodiment of the invention, the service type identifier carried in the service request message is used for indicating whether the core network switching process aiming at the terminal is a fast switching process. The service type identifier may be a number, letter, character or string of characters, etc. The service type identifier is a number, and when the number is 4, it indicates that the core network handover procedure for the terminal is a fast handover procedure, that is, after the target core network element determines that the service type identifier is the number 4, it determines that the fast handover procedure is to be performed, and then the step S102 and the following steps are performed. Specifically, the form or the value of the service type identifier may be set as required, and the embodiment of the present invention is not limited.

In the above, in the solution provided by the embodiment of the present invention, the service request message carries the service type identifier, and after receiving the service request message sent by the terminal, the target core network element can determine whether to perform the fast handover procedure, that is, whether to send the context acquisition message to the source core network element by reading the service type identifier.

Corresponding to the foregoing spatial core network switching method applied to the target core network element, the embodiment of the invention further provides a spatial core network switching method applied to the source core network element.

Referring to fig. 3, a flow chart of a second spatial core network switching method according to an embodiment of the present invention is provided, and the method is applied to a source core network element, and the method includes the following steps S301 and S302.

Step S301: and receiving a context acquisition message sent by the target core network element and indicating the context information of the terminal sent to the target core network element.

Step S302: and sending the context information to the target core network element.

Specifically, the embodiment shown in fig. 3 may refer to the embodiment shown in fig. 1, and will not be described herein.

In the above, in the solution provided by the embodiment of the present invention, after receiving the context acquisition message sent by the target core network element, the source core network element sends the context information of the terminal to the target core network element, so that the target core network element can acquire the context information of the terminal, thereby being capable of continuing the core network switching procedure for the terminal.

In one case, the source core network element and the target core network element are both mounted on the spatial node, and after the terminal performs the handover of the spatial core network, if the source core network continues to hold the relevant information of the terminal, the information security of the terminal may be at risk along with the movement of the spatial node on which the source core network is mounted between different areas, so the embodiment of the present invention provides an embodiment shown in fig. 4 below.

Referring to fig. 4, a flow chart of a third spatial core network switching method according to an embodiment of the present invention is shown, and compared with the embodiment shown in fig. 3, the method further includes the following step S303.

Step S303: and deleting the context information of the terminal.

After the context information of the terminal is sent to the target core network element, the source core network element deletes the self-saved context information of the terminal.

In the scheme provided by the embodiment of the invention, after the source core network element sends the context information of the terminal to the target core network element, the self-stored context information is deleted, so that the problems of leakage, stealing and the like of the context information of the terminal through the source core network can be avoided after the terminal performs space core network switching.

Corresponding to the foregoing spatial core network switching method applied to the target core network element, the embodiment of the invention also provides a spatial core network switching method applied to the terminal, which includes the following step D.

Step D: and under the condition that the core network switching condition is met, sending a service request message to enable a target core network element to send a context acquisition message for acquiring the context information of the terminal to a source core network element based on the service request message, and enabling the target core network element to execute a core network switching flow aiming at the terminal after receiving the context information.

Specifically, for the content in step D, reference may be made to the foregoing description of the spatial core network handover method for the target core network element, which is not described herein.

In one embodiment of the present invention, the method further includes the following step E.

Step E: and after receiving the re-registration indication information sent by the target core network element, re-registering the target core network element.

Wherein, the re-registration instruction information is: the target core network element is sent under the condition that the core network switching flow is abnormal.

Specifically, for the content in step E, reference may be made to the foregoing description of the spatial core network handover method for the target core network element, which is not described herein.

Referring to fig. 5, a flowchart of a fourth spatial core network handover method according to an embodiment of the present invention is provided, where the method is applied to a terminal, and the method includes the following steps S501 to S507.

Step S501: and under the condition that the signal coverage center of the source service space node is gradually far from the terminal and the signal intensity is gradually weakened, and the signal coverage center of the new service space node is gradually close to the terminal and the signal intensity is gradually enhanced, the preparation for the core network switching is confirmed.

The source service space node is a space node carrying a source core network element, and the new service space node is a space node carrying a target core network element.

Step S502: and judging whether to access the space node mobile communication system.

Specifically, if yes, the following step S504 is executed; if not, it is indicated that the terrestrial mobile communication system is accessed, and the following step S503 is performed.

Step S503: and performing a core network switching flow aiming at the ground mobile communication system.

Step S504: and sending a service request message for connecting the target core network to the target core network element so that the target core network element executes a core network switching flow for the terminal.

Step S505: judging whether an abnormality occurs in the process of switching to the target core network.

Specifically, if an abnormality occurs, the following step S507 is executed; if no abnormality occurs, the following step S506 is performed. In one example, the terminal may send query information for querying whether an abnormality occurs in the core network handover to the target core network element, and the target core network element replies the query information to the terminal, so that the terminal can determine whether the abnormality occurs in the process of switching to the target core network.

Step S506: and under the conditions that the core network is successfully switched, the target core network element activates a data link between the target core network element and the terminal, confirming that the target core network can be used for communication.

Step S507: and after the core network is abnormal in switching and the re-registration indication information sent by the target core network element is received, re-registering the target core network element.

Specifically, the description of the embodiment shown in fig. 5 may refer to the content of each embodiment in the foregoing spatial core network handover method, which is not described herein again.

In the space core network switching process, signaling interaction among network elements of the space core network, a space node base station and terminals is involved. Referring to fig. 6, a schematic flow chart of signaling interaction in a spatial core network handover according to an embodiment of the present invention may be described as follows, as can be seen from fig. 6:

(1) And the terminal sends a service request message to the space node base station.

Specifically, the service request message may be written in actual application as: and the Service Request message is used for requesting to connect with the target core network, the Service Request message carries a Service type identifier, and the space node carrying the space node base station is the space node carrying the target core network.

(2) The space node base station sends an N2 (service request) message to the new AMF.

Specifically, the Service Request message is carried in an N2 (Service Request) message, and the new AMF is an AMF in the target core network.

(3) The new AMF sends a Namf Communication creation terminal context request message, i.e., a Namf Communication Create UE Context Request message, to the old AMF.

Wherein, UE is an abbreviation of User Equipment, which refers to a terminal. Specifically, the old AMF is an AMF in the source core network. After receiving the Service Request message, the new AMF analyzes the Service type identifier carried in the Service Request message, and sends a Namf_communication_ Create UE Context Request message to the old AMF to acquire the context information of the terminal under the condition of confirming the fast switching flow.

(4) The old AMF sends a Namf Communication creation terminal context response message, i.e., namf Communication Create UE Context Response message, to the new AMF.

After receiving the Namf Communication Create UE Context Request message, the old AMF transmits a Namf Communication Create UE Context Response message to the new AMF, and transmits context information of the terminal, including MM (Mobile Management) information and SM (Session Management ) information, to the new AMF. Thereafter, the old AMF may delete the stored context information of the terminal.

(5) The new AMF sends an Nsmf protocol data unit Session update Session management context request message, i.e., an nsmf_pdu session_ Update SM Context Request message, to the new SMF.

Wherein, PDU is an abbreviation of Protocol Data Unit and refers to protocol data unit. After receiving the context information of the terminal, the new AMF transmits SM-related context information of the terminal to the new SMF through an nsmf_pdu session_ Update SM Context message. Wherein the new SMF is an SMF in the target core network.

(6) The new SMF sends an N4 session correction request message, i.e., an N4 Session Modification Request message, to the new UPF.

The new SMF sends information such as GTP (General Packet Radio Service Tunneling Protocol ) tunnel related to the terminal to the new UPF through an N4 Session Modification message. Wherein the new UPF is the UPF in the target core network.

(7) The new UPF sends an N4 session correction response message, i.e., an N4 Session Modification Response message, to the new SMF.

(8) The new SMF sends an Nsmf protocol data unit Session update Session management context response message, i.e., an nsmf_pdu session_ Update SM Context Response message, to the new AMF.

(9) The new AMF sends an N2 Message, i.e. an N2 Message, to the space node base station.

By sending the N2 Message to the space node base station, the new AMF sends GTP tunnel related information of the terminal to the space node base station, and then the space node base station may send service access information to the terminal, which indicates an access target core network.

(10) And (5) transmitting the radio resource control connection reset information between the space node base station and the terminal, wherein the radio resource control connection reset is RRC Connection Reconfiguration.

Here, RRC is an abbreviation of Radio Resource Control, which refers to radio resource control. Specifically, the spatial node base station performs RRC connection reconfiguration with the terminal according to the PDU session in which the uplink connection is activated, and QoS information of all QoS (Quality of Service ) flows of the data radio bearer.

(11) The space node base station sends N2 acknowledgement information to the new AMF.

Here, ack is Ack, acknowledgement, and indicates Acknowledgement. And transmitting the GTP tunnel information to the target core network by the space node base station through transmitting N2 confirmation information to the new AMF.

(12) The new AMF sends an Nsmf protocol data unit Session update Session management context request message, i.e., an nsmf_pdu session_ Update SM Context Request message, to the new SMF.

By sending an nsmf_pdu session_ Update SM Context Request message to the new SMF, the new AMF transparently passes the information sent by the received spatial node base station to the new SMF.

(13) The new SMF sends an N4 session correction request message, i.e., an N4 Session Modification Request message, to the new UPF.

By sending an N4 Session Modification Request message to the new UPF, the new SMF sends the received tunnel information sent by the spatial node base station to the new UPF.

(14) The new UPF sends an N4 session correction response message, i.e., an N4 Session Modification Response message, to the new SMF.

(15) The new SMF sends an Nsmf protocol data unit Session update Session management context response message, i.e., an nsmf_pdu session_ Update SM Context Response message, to the new AMF.

By sending an nsmf_pdu session_ Update SM Context Response message to the new AMF, the new SMF replies 204 to the new AMF, acknowledging that the operation was successful, completing the core network handover for the terminal.

Corresponding to the foregoing spatial core network switching method applied to the target core network element, the embodiment of the invention further provides a spatial core network switching device applied to the target core network element.

Referring to fig. 7, a schematic structural diagram of a first spatial core network switching apparatus according to an embodiment of the present invention is provided, where the apparatus is applied to a target core network element, and the apparatus includes:

a first receiving module 701, configured to receive a service request message of a terminal.

A first sending module 702, configured to send a context acquisition message for acquiring context information of the terminal to a source core network element, where the source core network element is a core network element to which the terminal is currently connected.

The receiving and executing module 703 is configured to receive the context information and execute a core network handover procedure for the terminal.

In one embodiment of the present invention, the apparatus further includes:

the deregistration module 704 is configured to deregister the terminal if the core network handover procedure for the terminal is abnormal.

A fourth sending module 705, configured to send re-registration instruction information to the terminal.

In one embodiment of the present invention, the apparatus further includes:

a judging module 706, configured to judge whether the service type identifier carried by the service request message indicates to perform the fast handover procedure.

Specifically, if it is determined that the service type identifier indicates to perform the fast handover procedure, the step of sending, by the first sending module 702, the context acquisition message for acquiring the context information of the terminal to the source core network element is performed.

Corresponding to the foregoing spatial core network switching method applied to the source core network element, the embodiment of the invention further provides a spatial core network switching device applied to the source core network element.

Referring to fig. 8, a schematic structural diagram of a second spatial core network switching apparatus according to an embodiment of the present invention is provided, where the apparatus is applied to a source core network element, and the apparatus includes:

a second receiving module 801, configured to receive a context acquisition message sent by a target core network element and indicating to send context information of a terminal to the target core network element.

A second sending module 802, configured to send the context information to the target core network element.

In one embodiment of the present invention, the apparatus further includes:

a deleting module 803, configured to delete the context information of the terminal.

Corresponding to the foregoing method for switching a spatial core network applied to a terminal, an embodiment of the present invention further provides a device for switching a spatial core network applied to a terminal, where the device includes:

a third sending module, configured to send a service request message when a core network handover condition is reached, so that a target core network element sends a context acquisition message for acquiring context information of a terminal to a source core network element based on the service request message, and after receiving the context information, the target core network element executes a core network handover procedure for the terminal; the source core network element is a core network to which the terminal is currently connected.

In one embodiment of the present invention, the apparatus further includes:

Referring to fig. 9, a schematic structural diagram of a first electronic device according to an embodiment of the present invention includes: processor 901, communication interface 902, memory 903 and communication bus 904, wherein processor 901, communication interface 902, memory 903 accomplish communication with each other via communication bus 904.

A memory 903 for storing a computer program.

The processor 901 is configured to implement any one of the steps of the spatial core network handover method applied to the target core network element when executing the program stored in the memory 903.

Referring to fig. 10, a schematic structural diagram of a second electronic device according to an embodiment of the present invention includes: processor 1001, communication interface 1002, memory 1003 and communication bus 1004, wherein processor 1001, communication interface 1002, memory 1003 accomplish each other's communication through communication bus 1004.

Memory 1003 is used for storing a computer program.

The processor 1001 is configured to implement any one of the steps of the spatial core network switching method applied to the source core network element when executing the program stored in the memory 1003.

Referring to fig. 11, a schematic structural diagram of a third electronic device according to an embodiment of the present invention includes: processor 1101, communication interface 1102, memory 1103 and communication bus 1104, wherein processor 1101, communication interface 1102 and memory 1103 communicate with each other via communication bus 1104.

A memory 1103 for storing a computer program.

The processor 1101 is configured to implement any one of the steps of the spatial core network handover method applied to the terminal when executing the program stored in the memory 1103.

The communication bus mentioned above for the electronic devices may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, etc. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus. The communication interface is used for communication between the electronic device and other devices.

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

The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

In yet another embodiment of the present invention, a computer readable storage medium is provided, in which a computer program is stored, the computer program implementing the steps of any of the above-mentioned spatial core network handover methods applied to a target core network element when executed by a processor.

When the computer program stored in the computer readable storage medium provided by the embodiment of the invention is used for switching the space core network, compared with the situation that the related art has more signaling interaction for acquiring the context information of the terminal in the process of switching the space core network for the terminal, the target core network element in the embodiment of the invention directly sends the context acquisition message to the source core network element currently connected with the terminal after receiving the service request message sent by the terminal and used for connecting the target core network, thereby acquiring the context information of the terminal, and then continuing the core network switching process aiming at the terminal until the switching is completed. The embodiment of the invention reduces the number of signaling interaction times required for acquiring the context information of the terminal, thereby reducing the total number of signaling interaction required by the terminal in the switching of the space core network, reducing the consumption of operation resources caused by the switching between the space core network and the terminal, and ensuring the data communication of the terminal in the switching process of the space core network to a greater extent.

In yet another embodiment of the present invention, another computer readable storage medium is provided, where a computer program is stored, the computer program, when executed by a processor, implements the steps of any of the above-mentioned spatial core network handover methods applied to a source core network element.

When the computer program stored in the computer readable storage medium provided by the embodiment of the invention is used for switching the space core network, the source core network element sends the context information of the terminal to the target core network element after receiving the context acquisition message sent by the target core network element, so that the target core network element can acquire the context information of the terminal, and the core network switching process aiming at the terminal can be continued.

In yet another embodiment of the present invention, there is further provided another computer readable storage medium having stored therein a computer program which, when executed by a processor, implements the steps of any of the above-mentioned spatial core network handover methods for a terminal.

In a further embodiment of the present invention, a computer program product comprising instructions, which when run on a computer, causes the computer to perform any of the above embodiments of the spatial core network handover method applied to a target core network element is also provided.

When the computer program product provided by the embodiment of the invention is used for switching the space core network, compared with the situation that the related technology is used for acquiring the context information of the terminal in the process of switching the space core network for the terminal and the related signaling interaction is more, the target core network element in the embodiment of the invention directly sends the context acquisition message to the source core network element currently connected with the terminal after receiving the service request message sent by the terminal and used for connecting the target core network, thereby acquiring the context information of the terminal, and then continuing the core network switching flow aiming at the terminal until the switching is completed. The embodiment of the invention reduces the number of signaling interaction times required for acquiring the context information of the terminal, thereby reducing the total number of signaling interaction required by the terminal in the switching of the space core network, reducing the consumption of operation resources caused by the switching between the space core network and the terminal, and ensuring the data communication of the terminal in the switching process of the space core network to a greater extent.

In yet another embodiment of the present invention, there is also provided another computer program product containing instructions, which when run on a computer, cause the computer to perform any of the spatial core network handover methods of the above embodiments applied to a source core network element.

When the computer program product provided by the embodiment of the invention is used for switching the space core network, the source core network element sends the context information of the terminal to the target core network element after receiving the context acquisition message sent by the target core network element, so that the target core network element can acquire the context information of the terminal, and the core network switching process aiming at the terminal can be continued.

In yet another embodiment of the present invention, there is also provided another computer program product containing instructions, which when run on a computer, cause the computer to perform the spatial core network handover method of any one of the above embodiments for a terminal.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for an apparatus, an electronic device, a computer readable storage medium, a computer program product embodiment, the description is relatively simple, as it is substantially similar to the method embodiment, as relevant see the partial description of the method embodiment.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. The space core network switching method is characterized by being applied to a target core network element, wherein the target core network element is an access and mobility management function (AMF) in a target space core network, and the method comprises the following steps:

receiving a service request message of a terminal, wherein the service request message represents: the terminal requests the core network switching from the currently connected source space core network to the target space core network;

sending a context acquisition message for acquiring context information of the terminal to a source core network element, wherein the source core network element is a core network element currently connected with the terminal, the source core network element is an AMF in a source space core network, and the target space core network is different from the source space core network;

receiving the context information, sending a session management context update request message to a Session Management Function (SMF) in the target space core network, sending a session modification request message to a User Plane Function (UPF) in the target space core network by the SMF, sending a session modification response message to the SMF by the UPF, sending a session management context update response message to the target core network element by the SMF, and executing a core network switching flow aiming at the terminal.

2. The method according to claim 1, wherein the method further comprises:

and sending re-registration indication information to the terminal.

3. The method according to claim 1 or 2, characterized in that after the receiving the service request message of the terminal, further comprising:

and if yes, executing the step of sending a context acquisition message for acquiring the context information of the terminal to the source core network element.

4. Method according to claim 1 or 2, characterized in that the target core network element and/or the source core network element are piggybacked on a spatial node.

5. The space core network switching method is characterized by being applied to a source core network element, wherein the source core network element is an access and mobility management function (AMF) in a source space core network;

receiving a context acquisition message sent by a target core network element and indicating to send context information of a terminal to the target core network element, wherein the context acquisition message is sent by the target core network element after receiving a service request message sent by the terminal, and the service request message indicates: the terminal requests a core network switching from a currently connected source space core network to a target space core network, wherein the target core network element is an AMF in the target space core network, and the target space core network is different from the source space core network;

The context information is sent to the target core network element, so that the target core network element receives the context information, and sends a session management context update request message to a Session Management Function (SMF) in the target space core network, the SMF sends a session correction request message to a User Plane Function (UPF) in the target space core network, the UPF sends a session correction response message to the SMF, the SMF sends a session management context update response message to the target core network element, and a core network switching flow for the terminal is executed.

6. The method of claim 5, further comprising, after said sending said context information to said target core network element:

and deleting the context information of the terminal.

7. Method according to claim 5 or 6, characterized in that the target core network element and/or the source core network element are piggybacked on a spatial node.

8. A method for switching a spatial core network, which is applied to a terminal, the method comprising:

under the condition that a core network switching condition is met, sending a service request message, so that a target core network element sends a context acquisition message for acquiring context information of a terminal to a source core network element based on the service request message, and after receiving the context information, the target core network element sends an update session management context request message to a Session Management Function (SMF) in a target space core network, the SMF sends a session correction request message to a User Plane Function (UPF) in the target space core network, the UPF sends a session correction response message to the SMF, and the SMF sends an update session management context response message to the target core network element, and executes a core network switching flow for the terminal; the source core network element is a core network element currently connected with the terminal, the target core network element is an access and mobility management function AMF in a target space core network, and the service request message indicates: and the terminal requests the core network switching from the currently connected source space core network to the target space core network, wherein the source core network element is an AMF in the source space core network, and the target space core network is different from the source space core network.

9. The method of claim 8, wherein the method further comprises:

after receiving the re-registration indication information sent by the target core network element, re-registering with the target core network element, wherein the re-registration indication information is: the target core network element is sent under the condition that the core network switching flow is abnormal.

10. The method according to claim 8 or 9, wherein the service request message carries a service type identifier, the service type identifier indicates that a fast handover procedure is performed, so that the target core network element performs the step of sending a context acquisition message for acquiring context information of the terminal to the source core network element after determining that the service type identifier indicates that a fast handover procedure is performed.

11. Method according to claim 8 or 9, characterized in that the target core network element and/or the source core network element are piggybacked on a spatial node.

12. A spatial core network switching device, which is characterized by being applied to a target core network element, wherein the target core network element is an access and mobility management function AMF in a target spatial core network, the device comprising:

A first receiving module, configured to receive a service request message of a terminal, where the service request message indicates: the terminal requests the core network switching from the currently connected source space core network to the target space core network;

a first sending module, configured to send a context acquisition message for acquiring context information of the terminal to a source core network element, where the source core network element is a core network element currently connected to the terminal, the source core network element and the target core network element are located in different spatial core networks, and the target spatial core network is different from the source spatial core network;

the receiving execution module is configured to receive the context information, send an update session management context request message to a session management function SMF in the target spatial core network, send a session correction request message to a user plane function UPF in the target spatial core network, send a session correction response message to the SMF, send an update session management context response message to the target core network element by the SMF, and execute a core network handover procedure for the terminal.

13. A spatial core network switching device, which is characterized by being applied to a source core network element, wherein the source core network element is an access and mobility management function AMF in a source spatial core network, and the device comprises:

The second receiving module is configured to receive a context acquisition message sent by a target core network element and indicating to send context information of a terminal to the target core network element, where the context acquisition message is sent by the target core network element after receiving a service request message sent by the terminal, and the service request message indicates: the terminal requests a core network switching from a currently connected source space core network to a target space core network, wherein the target core network element is an AMF in the target space core network, and the target space core network is different from the source space core network;

and the second sending module is used for sending the context information to the target core network element, so that the target core network element receives the context information and sends a session management context update request message to a Session Management Function (SMF) in the target space core network, the SMF sends a session correction request message to a User Plane Function (UPF) in the target space core network, the UPF sends a session correction response message to the SMF, the SMF sends a session management context update response message to the target core network element, and a core network switching flow aiming at the terminal is executed.

14. A spatial core network switching apparatus, applied to a terminal, comprising:

a third sending module, configured to send a service request message when a core network handover condition is reached, so that a target core network element sends a context acquisition message for acquiring context information of a terminal to a source core network element based on the service request message, and after receiving the context information, the target core network element sends an update session management context request message to a session management function SMF in a target spatial core network, the SMF sends a session correction request message to a user plane function UPF in the target spatial core network, the UPF sends a session correction response message to the SMF, and the SMF sends an update session management context response message to the target core network element, and executes a core network handover procedure for the terminal; the source core network element is a core network element currently connected with the terminal, the target core network element is an access and mobility management function AMF in a target space core network, and the service request message indicates: and the terminal requests the core network switching from the currently connected source space core network to the target space core network, wherein the source core network element is an AMF in the source space core network, and the target space core network is different from the source space core network.

15. The electronic equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;

a memory for storing a computer program;

a processor for implementing the method steps of any one of claims 1-4 or 5-7 or 8-11 when executing a program stored on a memory.

16. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 1-4 or 5-7 or 8-11.