CN114205883B - Network slice remapping method, device and storage medium - Google Patents

Network slice remapping method, device and storage medium Download PDF

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Publication number
CN114205883B
CN114205883B CN202111235747.1A CN202111235747A CN114205883B CN 114205883 B CN114205883 B CN 114205883B CN 202111235747 A CN202111235747 A CN 202111235747A CN 114205883 B CN114205883 B CN 114205883B
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network
request message
amf
network equipment
ground
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CN114205883A (en
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张雪菲
厉芸
李潇娴
崔琪楣
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Abstract

The invention provides a network slice remapping method, a device and a storage medium, wherein the method comprises the following steps: and under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message. According to the network slice remapping method, the network slice remapping device and the storage medium, when communication between the UE and the ground network equipment is abnormal, the AMF or the ground network equipment sends the switching request message to the satellite network equipment to request switching of the network slice, and the continuity of network slice service is guaranteed by the satellite network equipment.

Description

Network slice remapping method, device and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a network slice remapping method, a device and a storage medium.
Background
Network slicing refers to dividing a physical network into multiple virtual networks, each virtual network being referred to as a network slice. In the fifth generation (5th Generation,5G) wireless communication network, to adapt to different requirements of different services on network performance, network slices need to be switched.
In some scenarios, for example in a terrestrial communication network, the continuity of its network slicing service cannot be guaranteed. For example, when the ground communication facilities are lacking or largely damaged due to unreliability, the user equipment cannot access the network slicing service through the ground access network.
At present, remapping of network slices is initiated through ground network equipment, and a scheme for guaranteeing continuity of slicing services in a switching process of the network slices by using a satellite communication system is lacked.
Disclosure of Invention
The invention provides a network slice remapping method, a device and a storage medium, which are used for guaranteeing continuity of network slice service.
The invention provides a network slice remapping method, which comprises the following steps:
and under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message.
According to the network slice remapping method provided by the invention, the method further comprises the following steps:
and receiving the switching request message sent by the ground network equipment.
According to the network slice remapping method provided by the invention, the switching request message is sent to the satellite network device after the ground network device determines that the UE has a data radio bearer DRB and needs to execute dual-activation protocol stack DAPS switching.
According to the network slice remapping method provided by the invention, the method further comprises the following steps:
sending a paging message to the UE based on the periodic paging message initiated by the AMF;
establishing a Radio Resource Control (RRC) connection with the UE;
sending a switching command to an access and mobility management function network element AMF;
and receiving the switching request message sent by the AMF.
According to the network slice remapping method provided by the invention, the method further comprises the following steps:
receiving the switching request message sent by the AMF; and the switching request message is sent to the satellite network equipment after the AMF receives the switching request message sent by the ground network equipment.
The invention also provides a satellite network device, which comprises a memory, a transceiver and a processor:
a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the steps of the network slice remapping method as described in any one of the above.
The invention also provides a network slice remapping device, which comprises:
and the remapping module is used for carrying out network slice remapping processing according to the received switching request message under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the network slice remapping methods described above when the program is executed.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a network slice remapping method as described in any one of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements the steps of a network slice remapping method as described in any one of the above.
According to the network slice remapping method, the network slice remapping device and the storage medium provided by the embodiment of the invention, under the condition that communication between the UE and the ground network equipment is abnormal, the AMF or the ground network equipment sends the switching request message to the satellite network equipment to request the switching of the network slice, and the continuity of network slice service is ensured by the satellite network equipment
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a network slice remapping method according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a network slice remapping method according to an embodiment of the present invention;
FIG. 3 is a third flowchart illustrating a network slice remapping method according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a network slice remapping method according to an embodiment of the present invention;
FIG. 5 is a flowchart of a network slice remapping method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a satellite network device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a network slice remapping device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In a 5G network, different scenarios have different requirements on the network and even create collisions. Using a single network to serve different application scenarios may result in complex network architecture, inefficient network management, and inefficient resource utilization.
Network slicing (netslicking) is a way of networking on demand, cutting a physical network into multiple virtual end-to-end networks, where each virtual network is logically independent and contains all elements required for network communication, including devices, access, transmission and core networks within the network. Each virtual network has different functional characteristics and faces different demands and services.
One advantage of network slicing is that it enables a network operator to select the characteristics required for each slice, such as low latency, high throughput, connection density, spectral efficiency, traffic capacity, and network efficiency, to improve efficiency in creating products and services, and to improve user experience.
For multiple network operators sharing the same infrastructure, the network may be configured for network slices and specific functions defined. For different application scenes, the method has different network bandwidths and node operation processing capacities, and can flexibly change and add slices according to the operation policies of network operators.
However, in some scenarios, such as in terrestrial communication networks, the continuity of its network slicing service cannot be guaranteed. For example, when the ground communication facilities are lacking or largely damaged due to unreliability, the user equipment cannot access the network slicing service through the ground access network.
Satellite communication network and ground communication network and formed Satellite-ground convergence network (STIN), on the basis of ground communication network, the convergence Satellite communication network can be formed into network by means of several heterogeneous networks. The satellite communication network adopts a mode of accessing by a third generation partnership project (The 3rd Generation Partnership Project,3GPP), and is accessed to a ground core network as a special network device. The satellite communication network can make up for the defects of the ground communication network in terms of coverage, reliability and flexibility, and the combination of the satellite communication network and the ground communication network can provide better service experience for users. The system can overcome the defect of single operation of a satellite communication network or a ground communication network and provide global coverage and information support for various types of services.
The network slicing technology is expanded into a star-ground fusion network, virtual network logic which is independent of each other can be constructed on general equipment, customized network functions can be provided for various different services as required, the basic problems of transmission service quality, resource expandability, networking flexibility and the like can be comprehensively solved, and the overall network performance is improved.
In the R15 version given by the 3GPP standard customization organization, the definition of the basic functions and basic flows of network slicing has been primarily implemented, and the architecture and flows of slice management and orchestration are given.
Meanwhile, the 3GPP is also researching the standardization problem of the satellite-ground converged network communication, and researching a non-terrestrial network (Non Terrestrial Network, NTN) satellite mobile communication system based on the 5G technology in R15 and R16, which indicates that the satellite mobile communication system adopts the standard specification of the terrestrial cellular system. For realizing the continuity guarantee of the service of the network slice in the switching process, a corresponding scheme is not provided for how to utilize the satellite mobile communication system.
In order to solve the above problems in the prior art, embodiments of the present invention provide a network slice remapping method, device and storage medium.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is one of flow diagrams of a network slice remapping method provided by an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides a network slice remapping method, where an execution body is a satellite network device, including:
and step 101, under the condition that communication between the user equipment UE and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message.
Specifically, in the case of abnormal communication between a User Equipment (UE) and a terrestrial network device, it means:
case 1: and (3) the service between the UE and the ground network equipment is interrupted. For example, after natural disaster accidents such as flooding, earthquake, typhoon, etc., network slice service currently used by the UE is interrupted due to damaged ground communication facilities.
Case 2: the signal strength between the UE and the ground network device is less than a preset threshold. For example, in the moving process of the UE, the UE enters into areas such as mountain areas, barren islands, deserts and the like where people are rare, and due to lack of ground communication facilities, the signal strength between the UE and the ground network equipment is weak, so that the service continuity of the network slice currently accessed by the UE cannot be ensured.
In the case of abnormal communication between the UE and the terrestrial network device, the satellite network device may perform network slice remapping processing according to the received handover request message, and receive or reject the remapping request of the network slice.
The handover request message received by the satellite Network device is sent by an access and mobility management function (Access and Mobility Management Function, AMF) Network element in the terrestrial Network device or Core Network (CN).
The remapping of network slices is initiated by the source network device, i.e. the terrestrial network device. In case 1, the remapping request cannot be initiated after the ground network device is destroyed due to the damaged ground communication facilities. Thus, the UE may be paged through the satellite network device using the CN-initiated periodic paging message, such that the paged UE reestablishes a connection with the network and maps traffic related to the network slice to the satellite network device. At this time, the handover request message is transmitted to the satellite network device through the AMF.
In case 2, the remapping of the network slices is ground network device initiated, divided into three sub-cases.
(1) Network slice remapping based on NG interfaces. The NG interface refers to a signaling interface between the next generation radio access network (Next Generation Radio Access Network, NG-RAN) and the core network. The UE is served by a terrestrial network device, which sends a handover required (Handover Required) message to a core network element AMF, containing network slice information about the UE. After receiving the Handover Request message, the AMF sends a Handover Request (Handover Request) message to the satellite network device, where the Handover Request message includes network slice information related to the UE.
At this time, the handover request message is transmitted to the satellite network device through the AMF.
(2) Network slice remapping based on an Xn interface. An Xn interface refers to a signaling interface between different NG-RAN nodes. The UE is served by a terrestrial network device that sends a Handover Request (Handover Request) message to a satellite network device over an Xn interface, which contains network slice information about the UE.
At this time, the handover request message is transmitted to the satellite network device through the terrestrial network device.
(3) An Xn interface based network slice remapping supporting dual active protocol stacks (Dual Active Protocol Stack, DAPS). The DAPS handover refers to a handover procedure in which the UE maintains connection with the source network device after receiving the RRC message (handover command) to perform handover until the UE releases the source cell after randomly accessing the target network device.
At this time, the handover request message is transmitted to the satellite network device through the terrestrial network device.
According to the network slice remapping method provided by the embodiment of the invention, under the condition that communication between the UE and the ground network equipment is abnormal, the AMF or the ground network equipment sends a switching request message to the satellite network equipment to request switching of the network slice, and the continuity of network slice service is ensured by the satellite network equipment.
Optionally, the method further comprises:
and receiving the switching request message sent by the ground network equipment.
In particular, the continuity of the network slicing service is achieved by the satellite network device, and the handoff request message may be sent by the terrestrial network device to the satellite network device. The following describes the technical solution of the embodiment of the present invention by two examples.
Example one: fig. 2 is a second flow chart of a network slice remapping method according to an embodiment of the present invention, as shown in fig. 2, where the method is a network slice remapping method based on an Xn interface, and specifically includes:
in step 201, when the signal strength between the UE and the terrestrial network device is smaller than a preset threshold, and the UE supports the terrestrial network and the non-terrestrial network, the terrestrial network device sends a handover request message to the satellite network device, where the handover request message includes network slice information of the UE.
Step 202, the satellite network device sends a handover request acknowledgement (Handover Request Acknowledge) message to the terrestrial network device, where the handover request acknowledgement message includes a slice backoff decision or a slice remapping decision.
And after receiving the switching request message sent by the ground network equipment, the satellite network equipment makes slice sensing admission control. If the UE is rejecting the ongoing network slice by the satellite network device, the satellite network device makes a slice backoff decision; if the UE's ongoing network slice is accepted by the satellite network device, the satellite network device makes a slice remapping decision.
Step 203, handoff (Handover Execution) is performed. During the handover, channel switching is performed in order to keep the uninterrupted communication of the UE.
In step 204, the satellite network device sends a path switching request (Path Switch Request) message to the AMF, where the path switching request message includes a slice back-off decision or a slice remapping decision. To trigger the 5G core network to switch Downlink (DL) data to the satellite network device and to establish a network device-core network control plane interface instance with the satellite network device.
Step 205, the AMF sends a path switch request acknowledgement (Path Switch Request Acknowledge) message to the satellite network device.
Example two: fig. 3 is a third flow chart of a network slice remapping method according to an embodiment of the present invention, as shown in fig. 3, where the method is a DAPS-supporting network slice remapping method based on an Xn interface, and specifically includes:
step 301, the ground network device issues handover measurement control and the ue reports a measurement report.
Step 302, the ground network device determines whether the UE has a data radio bearer (Data Radio Bearer, DRB) to perform DAPS handover according to the sensitivity of the service to the delay, and determines that the target network device is a satellite network device. And switching the partial service with higher time delay sensitivity through the DAPS, and adopting a traditional switching mode for the partial service with lower time delay sensitivity.
The DAPS switching is configured for each DRB, and can support that part of DRBs adopt the DAPS switching and part of DRBs adopt the traditional switching mode.
Step 303, the terrestrial network device sends a DAPS handoff request message to the satellite network device, where the handoff request message includes DAPS DRB information and single network slice selection assistance information (Single Network Slice Selection Assistance Information, S-nsai) associated with the UE current protocol data unit (Protocol Data Unit, PDU) for selecting an assisted re-mapping request.
And 304, the satellite network equipment makes slice sensing access control according to the received DAPS switching request message. If the UE and the corresponding S-NSSAI are received, making a slice remapping decision; if the UE is received but the corresponding S-NSSAI is not received, making a slice rollback decision; if the UE is not received, a slice backoff decision is made to reject the handover or switch to a conventional handover procedure.
Step 305, in the case that the satellite network device makes a slice remapping decision, a handover request acknowledgement message is sent to the ground network device, where the handover request acknowledgement message includes DAPS DRB information and slice information.
Step 306, after receiving the handoff request acknowledgement message, the ground network device sends a handoff command to the UE, where the handoff command informs the UE to perform DAPS handoff and configure DAPS DRB information, including information of the current slice.
Step 307, the satellite network device receives the handover command:
(a) For DAPS DRB, the terrestrial network device sends an early status transfer (Early Status Transfer) message to the satellite network device containing a downlink count of service data units (Service Data Unit, SDU) of the first packet data convergence protocol (Packet Data Convergence Protocol, PDCP).
(b) For non-DAPS DRBs, the terrestrial network device sends the last data transmission sequence number to the satellite network device via a sequence number status transmission (Serial Number Status Transfer) message.
Step 308, the UE initiates a random access procedure to the satellite network device, while maintaining connection and data transmission with the satellite network device, until a Handover Success (Handover Success) message is received.
Step 309, after the UE completes the connection establishment of the radio resource control (Radio Resource Control, RRC) with the satellite network device, the satellite network device sends a handover success message to the ground network device, informing the ground network device that the handover is completed.
Step 310, after receiving the handover success message, the ground network device stops uplink/downlink data transmission of the ground network device, and sends a sequence number status transmission message to the satellite network device, wherein the sequence number status transmission message includes the last data transmission sequence number.
Step 311, the satellite network device sends a path switching request message to the AMF, where the path switching request message includes a slice rollback/remapping decision to trigger the 5G core network to switch Downlink (DL) data to the satellite network device, and establishes a network device-core network control plane interface instance with the satellite network device.
Step 312, the AMF sends a path switching request acknowledgement message to the satellite network device according to the received path switching request message.
Step 313, after the UE successfully accesses the satellite network device, the source network device is released, i.e. the terrestrial network device is released.
Optionally, the handoff request message is sent to the satellite network device after the ground network device determines that the UE has a data radio bearer DRB and needs to perform dual-activation protocol stack DAPS handoff.
According to the network slice remapping method provided by the embodiment of the invention, under the condition that communication between the UE and the ground network equipment is abnormal, based on the Xn interface, the ground network equipment sends the switching request message to the satellite network equipment to request the switching of the network slice, and the continuity of network slice service is ensured by using the satellite network equipment.
Optionally, the method further comprises:
sending paging information to the UE based on the periodic paging information initiated by an access and mobility management function network element AMF;
establishing a Radio Resource Control (RRC) connection with the UE;
sending a switching command to the AMF;
and receiving the switching request message sent by the AMF.
Specifically, in the case of service interruption between the UE and the terrestrial network device, continuity of the network slicing service is achieved by the satellite network device, and the handover request message is AMF transmitted to the satellite network device. The following describes the technical solution of the embodiment of the present invention by a specific example.
Fig. 4 is a flowchart of a network slice remapping method according to an embodiment of the present invention, as shown in fig. 4, where the method specifically includes:
in step 401, in the case that service between the UE and the ground network device is interrupted and the UE supports dual-connectivity communication between the ground network and the non-ground network, the AMF initiates periodic paging, and notifies the satellite network device to perform paging, and the satellite network device initiates paging to the UE.
Step 402, the UE initiates a service request after receiving the paging message, and establishes an RRC connection with the satellite network device in response to the paging message of the AMF.
Step 403, for the current PDU session and associated S-nsai that the UE is proceeding before the service interruption, after establishing the RRC connection with the satellite network device, the UE sends a handover command to the AMF through the satellite network device.
Step 404, after the AMF receives the handover command sent by the UE, it makes a slice remapping decision, and sends a handover request message to the satellite network device, where the handover request message includes the slice remapping decision.
Step 405, after receiving the handover request message, the satellite network device sends a handover request acknowledgement message to the AMF. If the satellite network equipment refuses the UE and the corresponding S-NSSAI, the switching request confirmation message comprises a slice rollback decision; if the satellite network device receives the UE and the corresponding S-nsai, the handover confirm message includes a slice remapping decision.
Step 406, after the AMF receives the handover request acknowledgement message, the AMF sends a handover complete message to the UE through the satellite network device, where the handover complete message includes a slice backoff decision or a slice remapping decision.
According to the network slice remapping method provided by the embodiment of the invention, under the condition that service between the UE and the ground network equipment is interrupted, the satellite network equipment is informed of paging the UE by utilizing periodic paging initiated by the core network, the paged UE and the network reestablish connection, a switching request message is sent to the satellite network equipment through the AMF, switching of the network slice is requested, and continuity of network slice service is ensured by utilizing the satellite network equipment.
Optionally, the method further comprises:
receiving the switching request message sent by the AMF; and the switching request message is sent to the satellite network equipment after the AMF receives the switching request message sent by the ground network equipment.
Specifically, under the condition that the signal strength between the UE and the ground network device is smaller than a preset threshold, a remapping request can be initiated to the AMF through a remapping strategy of the NG interface, and the AMF selects satellite network device access according to the preset configuration. The following describes the technical solution of the embodiment of the present invention by a specific example.
Fig. 5 is a fifth flowchart of a network slice remapping method according to an embodiment of the present invention, as shown in fig. 5, where the method is a network slice remapping method based on an NG interface, and specifically includes:
in step 501, in a case that the signal strength between the UE and the terrestrial network device is lower than a preset threshold, and the UE supports dual-connectivity communication between the terrestrial network and the non-terrestrial network, the terrestrial network device initiates a handover required (Handover Required) message to the AMF.
Step 502, after receiving a handover request sent by a ground network device, the AMF sends a handover request message to a satellite network device.
Step 503, the satellite network device responds to the handover request message and sends a handover request acknowledgement message to the AMF. If the satellite network equipment supports the UE to carry out the remapping slice, the switching request confirmation message comprises a slice remapping decision; if the satellite network device does not support the slice in which the UE is remapping, the handover request confirm message contains a slice backoff decision.
Step 504, the AMF sends a handover command to the ground network device according to the received handover request acknowledgement message, where the handover command includes a slice backoff decision or a slice remapping decision.
Step 505, the handover is performed.
According to the network slice remapping method provided by the embodiment of the invention, under the condition that the signal intensity between the UE and the ground network equipment is smaller than the preset threshold value, based on the NG interface, after the ground network equipment sends a switching request message to the AMF, the AMF sends the switching request message to the satellite network equipment to request the switching of the network slice, and the continuity of network slice service is ensured by the satellite network equipment.
Fig. 6 is a schematic structural diagram of a satellite network device according to an embodiment of the present invention, and as shown in fig. 6, the satellite network device includes a memory 601, a transceiver 602, and a processor 603, where:
a memory 601 for storing a computer program; a transceiver 602 for transceiving data under the control of the processor 603; a processor 603 for reading the computer program in the memory 601 and performing the following operations:
and under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message.
Specifically, a transceiver 602 is used to receive and transmit data under the control of a processor 603.
Wherein in fig. 6, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 603 and various circuits of the memory represented by the memory 601, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 602 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, including wireless channels, wired channels, optical cables, etc. The processor 603 is responsible for managing the bus architecture and general processing, and the memory 601 may store data used by the processor 603 in performing operations.
The processor 603 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), and the processor may also employ a multi-core architecture.
Optionally, the operations further comprise:
and receiving the switching request message sent by the ground network equipment.
Optionally, the handoff request message is sent to the satellite network device after the ground network device determines that the UE has a data radio bearer DRB and needs to perform dual-activation protocol stack DAPS handoff.
Optionally, the operations further comprise:
sending paging information to the UE based on the periodic paging information initiated by an access and mobility management function network element AMF;
establishing a Radio Resource Control (RRC) connection with the UE;
sending a switching command to the AMF;
and receiving the switching request message sent by the AMF.
Optionally, the operations further comprise:
receiving the switching request message sent by the AMF; and the switching request message is sent to the satellite network equipment after the AMF receives the switching request message sent by the ground network equipment.
It should be noted that, the satellite network device provided by the embodiment of the present invention can implement all the method steps implemented by the method embodiment in which the execution body is the satellite network device, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted.
Fig. 7 is a schematic structural diagram of a network slice remapping device according to an embodiment of the present invention, as shown in fig. 7, where the network slice remapping device includes:
and the remapping module 701 is configured to perform network slice remapping according to the received handover request message in a case where communication between the user equipment UE and the ground network equipment is abnormal.
Optionally, the apparatus further comprises:
and the first receiving module is used for receiving the switching request message sent by the ground network equipment.
Optionally, the handoff request message is sent to the satellite network device after the ground network device determines that the UE has a data radio bearer DRB and needs to perform dual-activation protocol stack DAPS handoff.
Optionally, the apparatus further comprises:
the paging module is used for sending paging information to the UE based on receiving the periodic paging information initiated by the access and mobility management function network element AMF;
a connection module, configured to establish a radio resource control RRC connection with the UE;
a sending module, configured to send a handover command to the AMF;
and the second receiving module is used for receiving the switching request message sent by the AMF.
Optionally, the apparatus further comprises:
a third receiving module, configured to send the handover request message by using an AMF; and the switching request message is sent to the satellite network equipment after the AMF receives the switching request message sent by the ground network equipment.
It should be noted that, the above device provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, as shown in fig. 8, the electronic device may include: a Processor (Processor) 801, a communication interface (Communications Interface) 802, a Memory (Memory) 803, and a communication bus 804, wherein the Processor 801, the communication interface 802, and the Memory 803 communicate with each other through the communication bus 804. The processor 801 may invoke logic instructions in the memory 803 to perform a network slice remapping method comprising:
and under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message.
Further, the logic instructions in the memory 803 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the network slice remapping method provided by the methods described above, the method comprising:
and under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a network slice remapping method provided by the above methods, the method comprising:
and under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal, performing network slice remapping processing according to the received switching request message.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The technical scheme provided by the embodiment of the invention can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE), LTE frequency division duplex (Frequency Division Duplex, FDD), LTE time division duplex (Time Division Duplex, TDD), long term evolution-advanced (Long Term Evolution Advanced, LTE-a), universal mobile system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.
The terminal device according to the embodiment of the present invention may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless Terminal Device may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Station (Remote Station), access Point (Access Point), remote Terminal Device (Remote Terminal), access Terminal Device (Access Terminal), user Terminal Device (User Terminal), user Agent (User Agent), user equipment (User Device), and embodiments of the present invention are not limited.
The network device according to the embodiment of the present invention may be a base station, where the base station may include a plurality of cells for providing services for the terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present invention may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile Communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (Evolutional Node B, eNB or e-NodeB) in a long term evolution (Long Term Evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (Next Generation System), a home evolved base station (Home Evolved Node B, heNB), a Relay Node (Relay Node), a home base station (Femto), a Pico base station (Pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A network slice remapping method, for use in a satellite network device, comprising:
under the condition that communication between User Equipment (UE) and ground network equipment is abnormal, performing network slice remapping according to the received switching request message; the communication anomaly between the UE and the ground network equipment comprises at least one of the following: service interruption between the UE and the ground network equipment, and signal strength between the UE and the ground network equipment are smaller than a preset threshold value;
under the condition of service interruption between UE and ground network equipment, sending a paging message to the UE based on a periodic paging message initiated by an access and mobility management function network element (AMF); establishing a Radio Resource Control (RRC) connection with the UE; sending a switching command to the AMF; receiving the switching request message sent by the AMF;
and receiving the switching request message sent by the ground network equipment or the AMF under the condition that the signal strength between the UE and the ground network equipment is smaller than a preset threshold value.
2. The network slice remapping method according to claim 1, wherein, in case that the signal strength between the UE and the terrestrial network device is smaller than a preset threshold, the receiving the handover request message in the handover request message sent by the terrestrial network device is that the terrestrial network device determines that the UE has a data radio bearer DRB and needs to perform dual-activation protocol stack DAPS handover, and then sends the handover request message to the satellite network device.
3. The network slice remapping method according to claim 1, wherein, in case that a signal strength between a UE and a terrestrial network device is smaller than a preset threshold, the handover request message in the handover request message sent by the receiving AMF is sent to the satellite network device after the AMF receives the handover request message sent by the terrestrial network device.
4. A satellite network device comprising a memory, a transceiver, and a processor, wherein:
a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:
under the condition that communication between User Equipment (UE) and ground network equipment is abnormal, performing network slice remapping according to the received switching request message; the communication anomaly between the UE and the ground network equipment comprises at least one of the following: service interruption between the UE and the ground network equipment, and signal strength between the UE and the ground network equipment are smaller than a preset threshold value;
under the condition of service interruption between UE and ground network equipment, sending a paging message to the UE based on a periodic paging message initiated by an access and mobility management function network element (AMF); establishing a Radio Resource Control (RRC) connection with the UE; sending a switching command to the AMF; receiving the switching request message sent by the AMF;
and receiving the switching request message sent by the ground network equipment or the AMF under the condition that the signal strength between the UE and the ground network equipment is smaller than a preset threshold value.
5. A network slice remapping apparatus, comprising:
the remapping module is used for carrying out network slice remapping processing according to the received switching request message under the condition that communication between the User Equipment (UE) and the ground network equipment is abnormal; the communication anomaly between the UE and the ground network equipment comprises at least one of the following: service interruption between the UE and the ground network equipment, and signal strength between the UE and the ground network equipment are smaller than a preset threshold value;
under the condition of service interruption between UE and ground network equipment, sending a paging message to the UE based on a periodic paging message initiated by an access and mobility management function network element (AMF); establishing a Radio Resource Control (RRC) connection with the UE; sending a switching command to the AMF; receiving the switching request message sent by the AMF;
and receiving the switching request message sent by the ground network equipment or the AMF under the condition that the signal strength between the UE and the ground network equipment is smaller than a preset threshold value.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the network slice remapping method according to any one of claims 1 to 3 when the program is executed.
7. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the network slice remapping method according to any one of claims 1 to 3.
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