WO2019134077A1

WO2019134077A1 - Method for system handover without inter-system interface, device and storage medium

Info

Publication number: WO2019134077A1
Application number: PCT/CN2018/070435
Authority: WO
Inventors: 刘建华; 杨宁
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-01-03
Filing date: 2018-01-03
Publication date: 2019-07-11
Also published as: WO2019134216A1; CN111418227B; CN111418227A

Abstract

Disclosed are a method for system handover without a system interface, and a device and a storage medium, wherein the method comprises: a terminal under an SR mode determining that a condition for system handover is met, and under a DR mode, initiating handover to a second network side; after the second network side has established for the terminal a second network conversation that corresponds to a first network conversation in a first network, and has completed the handover from the first network conversation to the second network conversation, the terminal releasing the connection with the first network and returning to the SR mode. In applying the solution of the present invention, time delays may be reduced.

Description

System switching method, device and storage medium when there is no intersystem interface

Technical field

The present invention relates to wireless network technologies, and in particular, to a system switching method, apparatus, and storage medium when there is no inter-system interface.

Background technique

In the 5G era, the Next Generation Radio Access Network (NG-RAN) may include a scenario in which the gNB and the eNB access the fifth generation mobile communication core network (5GC) simultaneously or separately, as shown in FIG. 1 , and FIG. 1 is an existing evolution. Schematic diagram of the connection relationship between the unified terrestrial radio access network (E-UTRAN)/new air interface (NR) and the 5GC/Evolved Packet Core Network (EPC).

When a system switch (System HO) is required, such as switching from 5GC to EPC, if there is no inter-system interface, the inter-system interface is usually an N26 interface, and the behavior of the terminal (UE) is defined as the following two.

1) If the terminal can identify the "support no N26 handover" indication sent by the network side, that is, the network side notifies the terminal that the N26 interface is not supported, the terminal can perform an Attach with Handover flag process and carry 5G. The access point name (APN) corresponding to the first network session (PDU Session) of the protocol data unit in the system architecture (5GS), thereby triggering the network side to search for the connected network element according to the APN used by the terminal, such as SMF+PGW -C, UPF+PGW-U, PCF+PCRF, etc., where SMF is a system management function entity, PGW is a packet data network gateway, UPF is a user plane function entity, PCF is a packet control function entity, and PCRF is a policy and charging. The rule function entity, the set network element can map out the 4G SM context to achieve the consistency of the first network session IP address.

2) If the terminal does not recognize the "support no N26 handover" indication sent by the network side, the tracking area update request can be directly performed. If the network side does not support the N26 interface, the network side is caused. A tracking area update reject (TAU Reject) message is sent to the terminal, and then the terminal initiates a normal attach procedure. In this case, the IP address consistency of the first network session cannot be guaranteed.

2 is a schematic flowchart of a system switching in the case where there is no N26 interface, as shown in FIG. 2, for the first method described above, starting from step 5, for the second method described above, 1 step to start execution.

It can be seen from the switching process shown in Figure 2 that the 5G switching process is very complicated, so interruption or data confusion during the switching process is inevitable. However, for some specific services that pursue high reliability and ultra-low latency, such as real-time mobile games, this delay of hundreds of milliseconds is unbearable.

Summary of the invention

In view of this, the present invention provides a system switching method, apparatus, and storage medium when there is no inter-system interface, which can reduce the delay.

The specific technical solutions are as follows:

A system switching method without an inter-system interface, including:

The terminal in the SR mode determines that the system switching condition is met, and initiates the handover to the second network side in the DR mode;

After the second network side establishes the second network session corresponding to the first network session of the terminal in the first network, and completes the switching of the first network session to the second network session, the terminal releases the The connection of the first network is returned to the SR mode.

A system switching method without an inter-system interface, including:

The RAN sends the predetermined information to the terminal in the SR mode, so that the terminal initiates the handover to the second network side in the DR mode, so as to establish the first network session corresponding to the terminal in the first network on the second network side. The second network session and completing the switching of the first network session to the second network session.

A system switching method without an inter-system interface, including:

When the terminal in the SR mode determines that the system switching condition is met and initiates the handover to the second network side in the DR mode, the first network and the second network of the second network establish the first end of the terminal in the first network. The second network session corresponding to the network session, and completing the handover from the first network session to the second network session.

A system switching device without an inter-system interface, comprising: a processing unit and a release unit;

The processing unit is configured to initiate a handover to the second network side in the dual registration DR mode when the single registration SR mode is determined and the system switching condition is determined to be met;

The releasing unit is configured to: after the second network side establishes a second network session corresponding to the first network session of the device in the first network, and completes the switching of the first network session to the second network session, Release the connection with the first network and return to the SR mode.

A system switching device without an inter-system interface, comprising: a sending unit;

The sending unit is configured to send, to the terminal in the single-registration SR mode, predetermined information, so that the terminal initiates a handover to the second network side in the dual-registration DR mode, so that the terminal is established on the second network side. The second network session corresponding to the first network session in the first network, and completing the switching of the first network session to the second network session.

A system switching device without an inter-system interface, comprising: a switching unit;

The switching unit is configured to establish, when the terminal in the single-registration SR mode meets the system switching condition, initiate a handover to the second network side in the dual-registration DR mode, establishing the first network of the terminal in the first network The second network session corresponding to the session, and completing the handover from the first network session to the second network session.

A computer apparatus comprising a memory, a processor, and a computer program stored on the memory and operative on the processor, the processor implementing the method as described above.

A computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements a method as described above.

Based on the above description, it can be seen that the present invention provides a system switching method without an inter-system interface, and introduces a switch mode of make before break, so as to meet the low latency requirement of a specific service. Achieve "0ms" switching capability.

DRAWINGS

FIG. 1 is a schematic diagram showing the connection relationship between the existing E-UTRAN/NR and 5GC/EPC.

FIG. 2 is a schematic flowchart of a system switching process in the case where there is no N26 interface.

FIG. 3 is a flowchart of an embodiment of a system switching method when there is no inter-system interface according to the present invention.

4 is a schematic diagram of a system switching process according to the present invention.

FIG. 5 is a schematic diagram of an overall system switching scheme when there is no inter-system interface according to the present invention.

FIG. 6 is a schematic structural diagram of a first embodiment of a system switching apparatus when there is no inter-system interface according to the present invention.

FIG. 7 is a schematic structural diagram of a second embodiment of a system switching apparatus when there is no inter-system interface according to the present invention.

FIG. 8 is a schematic structural diagram of a third embodiment of a system switching apparatus when there is no inter-system interface according to the present invention.

FIG. 9 illustrates a block diagram of an exemplary computer system/server 12 suitable for use in implementing embodiments of the present invention.

Detailed ways

In view of the problems existing in the prior art, the present invention proposes a system switching scheme when there is no inter-system interface, including: the terminal in the single registration (SR) mode determines that the system switching condition is satisfied, and in the dual registration (DR) mode. Initiating a handover to the second network side; when the second network side establishes a second network session corresponding to the first network session in the first network, and completes the handover of the first network session to the second network session, the terminal The connection to the first network can be released back to the SR mode.

The first network may be 5GS, the second network may be an evolved packet system (EPS), or the first network is EPS, and the second network is 5GS. The SR mode refers to the single-pass mode, and the DR refers to the two-way mode.

In order to make the technical solutions of the present invention clearer and clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

It is apparent that the described embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 3 is a flowchart of an embodiment of a system switching method when there is no inter-system interface according to the present invention. In this embodiment, it is assumed that the switch is switched from 5GS to EPS, that is, the first network is 5GS, and the second network is EPS. As shown in FIG. 3, the following specific implementation manners are included.

In 301, the terminal in the SR mode determines that the system switching condition is met, and initiates an attach procedure in the DR mode to the second network side, so that the second network side establishes a second network corresponding to the first network session in the first network. Network session.

In 302, after completing the handover of the first network session to the second network session, the terminal releases the connection with the first network and returns to the SR mode.

The second network session corresponding to the first network session generally means that the data stream of the first network session can be transmitted without changing the IP address on the second network session, and the quality of service (QoS) is the same.

4 is a schematic diagram of a system switching process according to the present invention. As shown in FIG. 4, the terminal starts to be in the SR mode, and before the 5GS coverage edge is moved, the attachment process in the EPS mode in the EPS mode can be initiated, thereby establishing the public data corresponding to the protocol data unit session (PDU Session) being used in the 5GS. PDN Connection, where the PDU Session is the first network session and the PDN Connection is the second network session. After the PDN Connection is established and the PDU Session is switched to the corresponding PDN Connection, the terminal can release the 5GS. Connected back to SR mode.

The specific implementation of the above process will be described in detail below.

First, the terminal can initiate and execute the registration process on the first network side, and the specific implementation is basically the same as the existing process. The difference is that the registration request message sent by the terminal carries the cross-system make before break capability identifier, and Obtaining an indication of whether the make before break capability is allowed in the Registration Accept message returned by the first network side.

After the terminal determines that the system switching condition is met, the attaching process in the DR mode may be initiated to the second network side. The specific implementation manner may include the following.

1) The terminal acquires the notification message sent by the first network side at any time after the terminal initiates the registration, and according to the notification message request, when the acquired measurement threshold meets the predetermined requirement, the make is initiated in the DR mode to the second network side. Before break Attach process.

For example, the RAN may send a notification message to the terminal at any time after the terminal initiates registration, so that the terminal performs the make before break Attach process in the DR mode at the relevant measurement threshold.

Correspondingly, the terminal may, according to the notification message, initiate a make before break Attach in the DR mode to the second network side when the obtained measurement threshold meets the predetermined requirement, for example, when the obtained measurement threshold is less than a predetermined threshold. Process.

2) The terminal acquires a command from the first network side, including a predetermined indication, such as a make before break indication.

For example, the RAN determines that the acquired measurement threshold meets a predetermined requirement. If the measurement threshold obtained from the terminal is less than a predetermined threshold, a handover request (Handover required) message may be sent to the access management function entity (AMF). During the registration process, it is known that the terminal works in the make before break mode, so a command can be sent to the terminal to cause the terminal to initiate the make before break Attach process.

For another example, the RAN determines that the obtained measurement threshold value meets a predetermined requirement. For example, if the measurement threshold value obtained from the terminal is less than a predetermined threshold, the RAN may directly send a command, such as a RRC Connection Reconfiguration message, to the terminal. The terminal is required to redirect to the 4G core network, including executing the make before break Attach indication.

If the reply message returned by the first network side in the registration process includes the network side supporting interworking without N26 indication information, the terminal may initiate an attach procedure in the DR mode to the second network side.

According to the process of make before break attachment, the terminal sends an Attach Request message to the network side. According to the prior art, the Attach Request message carries an International Mobile Subscriber Identity (IMSI) or an inherent global unique temporary terminal. In addition, in order to adapt to the solution of the present invention, it is necessary to carry the make before break indication information in the Attach Request message, and also carry the handover in the sub-message PDN Connectivity Request message of the Attach Request message ( Handover) identifier and the PDU Session ID that needs to be switched.

The Handover logo indicates that the terminal needs to switch from 5G to 4G. PDU Session ID, which is the ID of the PDU Session that needs to be switched. The make before break indication, based on this information, will be processed in accordance with the make before break switching mode.

After obtaining the Attach Request message, the mobility management function entity (MME) on the network side can obtain the corresponding APN according to the prior art, and then determine the set network element such as SMF+PGW_C and UPF+PGW_U which are set up with 5G, and further The mapping between the PDU Session and the PDN Connection session that needs to be switched can be completed by the cooperating network element, thereby establishing a corresponding PDN Connection connection and sharing the same IP address. At the same time, the combined network element will not release the first network session of the PDU Session, and will keep the PDU Session and the PDN Connection established and activated at the same time.

The process of attaching the request is similar to the step 5-13 in FIG. 2, and the related description is omitted, and details are not described herein again.

After the UE completes the Attach of the EPS in the DR mode (including the establishment of the corresponding PDN Connection), the set NE can initiate a Path Switch action to switch the data flow from the original 5GS PDU Session to the EPS. On the PDN Connection. The action of the Path Switch may be that the corresponding PDU Session on the 5GS is released by the SMF+PGW-C, and the data stream is transmitted using the newly established PDN Connection.

In addition, the terminal can also complete the handover. For example, the terminal can release the related PDU Session in the 5GS. Because the dual-pass mode exists in both the PDU Session and the PDN Connection, one of the data streams can be released. Relying on another transmission, this is equivalent to completing the Action of the Path Switch. The terminal can release the PDU Session by triggering the PDU Session Release process.

In practical applications, the terminal can select a priority switch from the data services performed. For example, if the terminal is performing three data services, and each data service corresponds to one PDU session, the terminal may select a data service that needs to be switched preferentially, and the PDU session corresponding to the data service is carried in the PDN Connectivity Request message. The data service with priority switching can be a data service with strict delay requirements, such as real-time mobile game service.

After the second network side establishes the PDN connection corresponding to the PDU Session that is preferentially switched, the PDU session with the priority switching can be switched to the PDN Connection through the Path Switch, and then the terminal can respectively initiate the PDN Connection corresponding to the other PDU Sessions. The establishment process, and after the other PDU Sessions are respectively switched to the corresponding PDN Connections, the connection with the first network is released.

Each time the terminal initiates the establishment process of the PDN connection corresponding to the other PDU Session, the Handover identifier and the PDU Session identifier may be carried in each PDN Connectivity Request message, and the other PDU Sessions may be switched to the corresponding PDN Connection according to the foregoing manner. on.

Alternatively, after the PDN connection corresponding to the PDU Session that is preferentially switched is established on the network side, the handover may not be performed first, but the terminal separately initiates the establishment process of the PDNConnection corresponding to the other PDU Sessions, and then switches each PDU Session separately. Go to the corresponding PDN Connection.

Before the switchover, the peer-to-peer PDU Session and PDN Connection are in the active state at the same time.

That is to say, the switching of the preferentially switched PDU Session may occur after all PDN Connections are established, and all PDU Sessions are switched together, or the priority switched PDUSession may be switched first, and then other PDN Connections are established. The switching is completed, and the specific method may be determined according to actual needs. Preferably, the latter method may be adopted.

For example, the terminal performs three data services in the 5GS, which are data service 1 - data service 3, and each data service corresponds to one PDU session. Then, data service 1 can be selected, and the switching of data service 1 is preferentially completed. Then, the data service 2 and the data service 3 are switched, thereby preferentially ensuring seamless switching of important data services.

After all the PDU Sessions are switched, the terminal can release the connection with the first network. If the terminal can initiate a deregistration process, the connection to the first network is released.

In the above method embodiments, the description will be mainly made from the terminal side, and the following description will be made from the network elements on the network side.

For the RAN on the network side, it may send predetermined information to the terminal in the SR mode, so that the terminal initiates a handover to the second network side in the DR mode, so as to establish the terminal in the first network on the second network side. The second network session corresponding to the first network session, and completing the switching of the first network session to the second network session.

Specifically, the RAN may send a notification message to the terminal at any time after the terminal initiates the registration, so that the terminal initiates the handover to the second network side when the obtained measurement threshold meets the predetermined requirement according to the notification message request.

Alternatively, the RAN network element determines that the obtained measurement threshold value meets a predetermined requirement, and sends a command to the terminal, including a make before break indication.

In addition, the RAN determines that the acquired measurement threshold meets the predetermined requirement, and may send a Handover Required message to the AMF, so that the AMF sends a command to the terminal, so that the terminal initiates a handover to the second network side according to the command.

For the set network element, when the terminal in the SR mode determines that the system switching condition is met and initiates the handover to the second network side in the DR mode, the set network element can establish the first network of the terminal in the first network. The second network session corresponding to the session, and completing the handover from the first network session to the second network session.

Specifically, the set network element may establish a second network session corresponding to the first network session in which the terminal preferentially switches in the first network, and respectively establish a second network corresponding to the other first network session in the first network. After the second network sessions are respectively established, the first network sessions are respectively switched to the corresponding second network sessions.

Alternatively, the set network element may establish a second network session corresponding to the first network session in which the terminal preferentially switches in the first network, and switch the first network session that is preferentially switched to the corresponding second network session, after which Separating the second network sessions corresponding to the other first network sessions in the first network, and respectively switching the other first network sessions to the corresponding second network sessions.

Specifically, the set network element can switch the first network session to the corresponding second network session by performing a path switching action.

Based on the above description, FIG. 5 is a schematic diagram of an overall system switching scheme when there is no inter-system interface according to the present invention. For specific implementation, refer to the foregoing related description.

In addition, the above is mainly an example of switching from 5GS to EPS. The switching from EPS to 5GS is similar to the switching from 5GS to EPS. The difference is mainly: when the terminal in SR mode determines that the system switching condition is met, Initiating a registration process in the DR mode to the second network side, and initiating a second network session establishment process (each session is initiated separately) to the second network side after the registration is completed, so that the second network side establishes the terminal in the first network. The second network session corresponding to the first network session.

In addition, the registration request message sent in the registration process may carry a Handover identifier, indicating that the terminal switches from the first network to the second network.

For the foregoing method embodiments, for the sake of brevity, they are all described as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described order of actions, because according to the present invention, Some steps may be performed in other orders or simultaneously. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

The above is a description of the method embodiment, and the solution of the present invention will be further described below by means of the device embodiment.

FIG. 6 is a schematic structural diagram of a first embodiment of a system switching apparatus when there is no inter-system interface according to the present invention. As shown in FIG. 6, the processing unit 601 and the releasing unit 602 are included.

The processing unit 601 is configured to initiate a handover to the second network side in the DR mode when the system is in the SR mode and determines that the system switching condition is met.

The releasing unit 602 is configured to: when the second network side establishes a second network session corresponding to the first network session of the device in the first network, and completes the switching of the first network session to the second network session, releasing A network connection, back to SR mode.

Specifically, the processing unit 601 may initiate an attach procedure in the DR mode to the second network side, so that the second network side establishes a second network session corresponding to the first network session; or the processing unit 601 may also initiate the second network side. The registration process in the DR mode, and after the registration is completed, initiates a second network session establishment process to the second network side, so that the second network side establishes a second network session corresponding to the first network session.

The Registration Request message sent in the registration process may carry a Handover identifier indicating that the first network is switched to the second network.

In addition, the processing unit 601 may also initiate and execute a registration process on the first network side before determining that the system switching condition is satisfied. The registration request message sent in the registration process carries the cross-system make before break capability identifier, and obtains the indication information about whether the make before break capability is allowed in the Registration Accept message returned by the first network side.

The processing unit 601 can obtain the notification message that is sent by the first network side at any time after the processing unit 601 initiates the registration, and according to the notification message request, if the obtained measurement threshold value meets the predetermined requirement, it is determined that the system switching condition is met, and then The handover is initiated to the second network side in the DR mode.

Alternatively, the processing unit 601 acquires a command from the first network side, and includes a predetermined indication, such as a make before break indication, to initiate a handover to the second network side in the DR mode according to the command.

Specifically, the processing unit 601 may obtain an RRC Connection Reconfiguration message, where the predetermined indication is included, and if the network side supports the no-interface interworking indication information in the reply message returned by the first network side in the registration process, the second mode may be in the DR mode. The network side initiates a handover.

When the initiating handover is performed by the processing unit 601, the attach request message may be sent to the second network side, where the address request message is carried, and the Handover identifier is carried in the sub-message PDNConnectivity Request message of the Attach Request message and needs to be switched. The first network session identifier.

In addition, after the second network side establishes the second network session corresponding to the first network session that is preferentially switched, the processing unit 601 may separately initiate the establishment process of the second network session corresponding to the other first network sessions, when all the After a network session is switched to the corresponding second network session, the release unit 602 can release the connection with the first network.

Or, after the second network side establishes the second network session corresponding to the first network session that is preferentially switched, and the first network session that is preferentially switched is switched to the corresponding second network session, the processing unit 601 may separately initiate the The establishment process of the second network session corresponding to the other first network session, and after the other first network sessions are respectively switched to the corresponding second network session, the release unit 602 releases the connection with the first network.

When the first network session and the corresponding second network session exist simultaneously, the first network session may be switched to the corresponding second network session by performing the path switching action by the second network side. Alternatively, processing unit 601 can release the first network session in the first network to complete the handover from the first network session to the corresponding second network session. For example, the processing unit 601 can release the first network session by triggering the first network session release process.

After all the first network sessions are switched to the corresponding second network session, the release unit 602 can initiate a deregistration process, thereby releasing the connection with the first network. The correspondence may mean that the data flow of the first network session can be transmitted on the second network session without changing the IP address, and the QoS is the same.

FIG. 7 is a schematic structural diagram of a second embodiment of a system switching apparatus when there is no inter-system interface according to the present invention. As shown in FIG. 7, the transmission unit 701 is included.

The sending unit 701 is configured to send the predetermined information to the terminal in the SR mode, so that the terminal initiates the handover to the second network side in the DR mode, so as to establish the first network session of the terminal in the first network on the second network side. Corresponding the second network session, and completing the switching of the first network session to the second network session.

The sending unit 701 may send a notification message to the terminal at any time after the terminal initiates the registration, so that the terminal initiates the handover to the second network side when the acquired measurement threshold meets the predetermined requirement according to the notification message request.

In addition, the apparatus shown in FIG. 7 may further include: a determining unit 700.

The determining unit 700 is configured to determine whether the acquired measurement threshold meets a predetermined requirement. Accordingly, the sending unit 701 may send a command to the terminal, when the measurement threshold meets the predetermined requirement, including a predetermined indication, so that the terminal is to the second The network side initiates a handover.

Alternatively, the sending unit 701 may also send a Handover Required message to the AMF when the measurement threshold value meets the predetermined requirement, so that the AMF sends a command to the terminal, so that the terminal initiates the handover to the second network side according to the command.

FIG. 8 is a schematic structural diagram of a third embodiment of a system switching apparatus when there is no inter-system interface according to the present invention. As shown in FIG. 8, the switching unit 801 is included.

The switching unit 801 is configured to: when the terminal in the SR mode determines that the system switching condition is met, and initiates the handover to the second network side in the DR mode, establish a second network session corresponding to the first network session of the terminal in the first network. And completing the switch from the first network session to the second network session.

Specifically, the switching unit 801 may establish a second network session corresponding to the first network session in which the terminal preferentially switches in the first network, and respectively establish a second network session corresponding to the other first network session in the first network. After each second network session is separately established, each first network session is switched to a corresponding second network session.

Alternatively, the switching unit 801 establishes a second network session corresponding to the first network session in which the terminal preferentially switches in the first network, and switches the first network session that is preferentially switched to the corresponding second network session, and then establishes respectively And the second network session corresponding to the first network session in the first network, and respectively switching the other first network session to the corresponding second network session.

The switching unit 801 can switch the first network session to the corresponding second network session by performing a path switching action.

For the specific working process of the foregoing device embodiments, refer to the corresponding description in the foregoing method embodiments, and details are not described herein.

In summary, the solution described in the foregoing embodiments can meet the low latency requirement of a specific service and achieve a "0 ms" switching capability.

FIG. 9 illustrates a block diagram of an exemplary computer system/server 12 suitable for use in implementing embodiments of the present invention. The computer system/server 12 shown in FIG. 9 is merely an example and should not impose any limitation on the function and scope of use of the embodiments of the present invention.

As shown in Figure 9, computer system/server 12 is embodied in the form of a general purpose computing device. The components of computer system/server 12 may include, but are not limited to, one or more processors (processing units) 16, memory 28, and a bus 18 that connects different system components, including memory 28 and processor 16.

Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of a variety of bus structures. For example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA Bus, a Video Electronics Standards Association (VESA) local bus, and peripheral component interconnects ( PCI) bus.

Computer system/server 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer system/server 12, including both volatile and non-volatile media, removable and non-removable media.

Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and/or cache memory 32. Computer system/server 12 may further include other removable/non-removable, volatile/non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (not shown in Figure 9, commonly referred to as "hard disk drives"). Although not shown in FIG. 9, a disk drive for reading and writing to a removable non-volatile disk (such as a "floppy disk"), and a removable non-volatile disk (such as a CD-ROM, DVD-ROM) may be provided. Or other optical media) read and write optical drive. In these cases, each drive can be coupled to bus 18 via one or more data medium interfaces. Memory 28 can include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of various embodiments of the present invention.

A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more applications, other programs Modules and program data, each of these examples or some combination may include an implementation of a network environment. Program module 42 typically performs the functions and/or methods of the described embodiments of the present invention.

Computer system/server 12 may also be in communication with one or more external devices 14 (e.g., a keyboard, pointing device, display 24, etc.), and may also be in communication with one or more devices that enable a user to interact with the computer system/server 12. And/or in communication with any device (e.g., network card, modem, etc.) that enables the computer system/server 12 to communicate with one or more other computing devices. This communication can take place via an input/output (I/O) interface 22. Also, computer system/server 12 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and/or a public network, such as the Internet) through network adapter 20. As shown in FIG. 9, network adapter 20 communicates with other modules of computer system/server 12 via bus 18. It should be understood that although not shown in the figures, other hardware and/or software modules may be utilized in conjunction with computer system/server 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, Tape drives and data backup storage systems.

The processor 16 executes various functional applications and data processing by running programs stored in the memory 28, such as implementing the methods of the embodiment shown in FIG.

The present invention also discloses a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the method of the embodiment shown in FIG.

Any combination of one or more computer readable media can be utilized. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive lists) of computer readable storage media include: electrical connections having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read only memory (ROM), Erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage device, magnetic storage device, or any combination of the above. In this document, a computer readable storage medium can be any tangible medium that can contain or store a program, which can be used by or in connection with an instruction execution system, apparatus or device.

A computer readable signal medium may include a data signal that is propagated in the baseband or as part of a carrier, carrying computer readable program code. Such propagated data signals can take a variety of forms including, but not limited to, electromagnetic signals, optical signals, or any combination of the above. The computer readable signal medium can also be any computer readable medium other than a computer readable storage medium, which can transmit, propagate, or transport a program for use by or in connection with the instruction execution system, apparatus, or device. .

Program code embodied on a computer readable medium can be transmitted by any suitable medium, including but not limited to wireless, wire, fiber optic cable, RF, etc., or any combination of the foregoing.

Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including an object oriented programming language such as Java, Smalltalk, C++, and conventional A procedural programming language - such as the "C" language or a similar programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer, partly on the remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (eg, using an Internet service provider) Internet connection).

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method and the like may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

Claims

A system switching method when there is no inter-system interface, characterized in that it comprises:

The terminal in the single-registration SR mode determines that the system switching condition is met, and initiates the handover to the second network side in the dual-registration DR mode;

After the second network side establishes the second network session corresponding to the first network session of the terminal in the first network, and completes the switching of the first network session to the second network session, the terminal releases the The connection of the first network is returned to the SR mode.
The method of claim 1 wherein

The initiating the handover to the second network side in the DR mode includes:

The terminal initiates an attach procedure in the DR mode to the second network side, so that the second network side establishes a second network session corresponding to the first network session of the terminal in the first network;

Or the terminal initiates a registration process in the DR mode to the second network side, and initiates a second network session establishment process to the second network side after the registration is completed, so that the second network side establishes the terminal in the first network. The first network session corresponds to the second network session.
The method of claim 2 wherein:

The registration request registration request message sent in the registration process carries a handover Handover identifier, indicating that the terminal switches from the first network to the second network.
The method of claim 2 wherein:

Before the terminal in the SR mode determines that the system switching condition is met, the method further includes:

The terminal initiates and executes a registration process on the first network side;

The registration request message sent by the terminal carries a cross-system first connection and then breaks the make before break capability identifier, and obtains the capability of the make before break that is carried in the registration accept message returned by the first network side. Instructions.
The method of claim 4 wherein:

The terminal determines that the system switching condition is met:

Obtaining, by the terminal, a notification message sent by the first network side at any time after the terminal initiates registration;

The terminal, according to the notification message, determines that the system switching condition is met if the acquired measurement threshold meets a predetermined requirement.
The method of claim 4 wherein:

The determining, by the terminal, that the system switching conditions are met includes:

The terminal acquires a command from the first network side, including a predetermined indication.
The method of claim 6 wherein:

The acquiring, by the terminal, the command from the first network side includes:

The terminal acquires a radio resource control connection reconfiguration RRC Connection Reconfiguration message, where the predetermined indication is included;

If the reply message returned by the first network side in the registration process includes the network side supporting no interface interworking indication information, the terminal initiates a handover to the second network side in the DR mode.
The method of claim 4 wherein:

The initiating the attaching process in the DR mode to the second network side includes:

The terminal sends an attach request Attach Request message to the second network side, where the device carries the predetermined indication, and carries the handover Handover identifier and the first network session identifier that needs to be switched in the sub-message PDN Connectivity Request message of the Attach Request message.
The method of claim 1 wherein

After the second network side establishes a second network session corresponding to the first network session of the terminal in the first network, and completes the switching of the first network session to the second network session, the terminal releases The connection with the first network includes:

After the second network side establishes the second network session corresponding to the first network session that is preferentially switched, the terminal respectively initiates a process of establishing a second network session corresponding to the other first network session;

After all the first network sessions are switched to the corresponding second network session, the terminal releases the connection with the first network.
The method of claim 1 wherein

After the second network side establishes a second network session corresponding to the first network session of the terminal in the first network, and completes the switching of the first network session to the second network session, the terminal releases The connection with the first network includes:

After the second network side establishes the second network session corresponding to the first network session that is preferentially switched, and switches the first network session of the priority switching to the corresponding second network session, the terminal separately initiates for other a process of establishing a second network session corresponding to the first network session, and releasing the connection with the first network after the other first network sessions are respectively switched to the corresponding second network session.
The method of claim 1 wherein

Switching the first network session to the second network session includes:

When the first network session and the corresponding second network session exist simultaneously, the first network session is switched to the corresponding second network session by performing the path switching action by the second network side, or the terminal is in the The first network session is released in a network, and the handover from the first network session to the corresponding second network session is completed.
The method of claim 11 wherein

The releasing, by the terminal, the first network session includes:

The terminal releases the first network session by triggering a first network session release procedure.
The method of claim 1 wherein

The releasing, by the terminal, the connection with the first network includes:

The terminal initiates a deregistration process to release the connection with the first network.
The method of claim 1 wherein

The second network session corresponding to the first network session in the first network includes:

The data flow of the first network session can be transmitted without changing the IP address on the second network session, and the quality of service QoS is the same.
A system switching method when there is no inter-system interface, characterized in that it comprises:

The radio access network device RAN sends the predetermined information to the terminal in the single-registration SR mode, so that the terminal initiates handover to the second network side in the dual-registration DR mode, so that the terminal is established on the second network side. A second network session corresponding to the first network session in the network, and completing the switching of the first network session to the second network session.
The method of claim 15 wherein:

The sending, by the RAN, the predetermined information to the terminal in the SR mode includes:

The RAN sends a notification message to the terminal at any time after the terminal initiates registration, so that the terminal requests, according to the notification message, that the acquired measurement threshold meets a predetermined requirement, to the second network. The side initiates a switch.
The method of claim 15 wherein:

The sending, by the RAN, the predetermined information to the terminal in the SR mode includes:

The RAN network element determines that the acquired measurement threshold value meets a predetermined requirement, and sends a command to the terminal, including a predetermined indication.
The method of claim 15 wherein:

The method further includes: the RAN determining that the acquired measurement threshold meets a predetermined requirement, and transmitting a handover request Handover required message to the access management function entity AMF, so that the AMF sends a command to the terminal, so that the terminal is configured according to the terminal The command initiates a handover to the second network side.
A system switching method when there is no inter-system interface, characterized in that it comprises:

When the terminal in the single-registration SR mode determines that the system switching condition is met and initiates the handover to the second network side in the dual-registration DR mode, the first network and the second network-connected network element establish the terminal in the first network. a second network session corresponding to the first network session, and completing a handover from the first network session to the second network session.
The method of claim 19 wherein:

The establishing, by the terminal, the second network session corresponding to the first network session in the first network, and completing the switching from the first network session to the second network session includes:

Establishing a second network session corresponding to the first network session in which the terminal is preferentially switched in the first network, and establishing a second network session corresponding to the other first network session in the first network by the terminal;

After each second network session is separately established, each first network session is switched to a corresponding second network session.
The method of claim 19 wherein:

The establishing, by the terminal, the second network session corresponding to the first network session in the first network, and completing the switching from the first network session to the second network session includes:

Establishing a second network session corresponding to the first network session in which the terminal is preferentially switched in the first network, and switching the first network session of the priority switching to the corresponding second network session;

Separating the second network sessions corresponding to the other first network sessions of the terminal in the first network, and respectively switching the other first network sessions to the corresponding second network sessions.
The method of claim 19 wherein:

The completing the handover from the first network session to the second network session includes:

The first network session is switched to the corresponding second network session by performing a path switching action.
A system switching device without an inter-system interface, comprising: a processing unit and a releasing unit;

The processing unit is configured to initiate a handover to the second network side in the dual registration DR mode when the single registration SR mode is determined and the system switching condition is determined to be met;

The releasing unit is configured to: after the second network side establishes a second network session corresponding to the first network session of the device in the first network, and completes the switching of the first network session to the second network session, Release the connection with the first network and return to the SR mode.
The device according to claim 23, wherein

The processing unit initiates an attach procedure in the DR mode to the second network side, so that the second network side establishes a second network session corresponding to the first network session;

Or the processing unit initiates a registration process in the DR mode to the second network side, and initiates a second network session establishment process to the second network side after the registration is completed, so that the second network side establishes the first network session corresponding to the first network session. Two network sessions.
The device according to claim 24, wherein

The registration request Registration Request message sent in the registration process carries a handover Handover identifier, indicating that the handover is performed from the first network to the second network.
The device according to claim 24, wherein

The processing unit is further configured to initiate and execute a registration process on the first network side before determining that the system switching condition is met;

The registration request message sent in the registration process carries the cross-system first connection and the break before break capability identifier, and obtains the capability of the make before break that is carried in the registration accept message returned by the first network side. Instructions.
The device of claim 26, wherein

The processing unit acquires a notification message that is sent by the first network side at any time after the processing unit initiates registration, and according to the notification message request, if the obtained measurement threshold value meets a predetermined requirement, it is determined that the system switching condition is met. .
The device of claim 26, wherein

The processing unit acquires a command from the first network side, including a predetermined indication, and initiates a handover to the second network side in the DR mode.
The device of claim 28, wherein

The processing unit acquires a radio resource control connection reconfiguration RRC Connection Reconfiguration message, where the RRC Connection Reconfiguration message is included, and if the reply message returned by the first network side in the registration process includes the network side supporting no interface interworking indication information, the processing unit is in the DR mode. The second network side initiates a handover.
The device according to claim 24, wherein

The processing unit sends an attach request Attach Request message to the second network side, where the packet carries the predetermined indication, and carries the handover Handover identifier and the first network session identifier that needs to be switched in the sub-message PDN Connectivity Request message of the Attach Request message. .
The device according to claim 23, wherein

After the second network side establishes the second network session corresponding to the first network session that is preferentially switched, the processing unit respectively initiates a process of establishing a second network session corresponding to the other first network session;

After all the first network sessions are switched to the corresponding second network session, the release unit releases the connection with the first network.
The device according to claim 23, wherein

After the second network side establishes the second network session corresponding to the first network session that is preferentially switched, and the first network session of the priority switching is switched to the corresponding second network session, the processing unit separately initiates a process of establishing a second network session corresponding to the first network session, and releasing the connection with the first network by the release unit after the other first network sessions are respectively switched to the corresponding second network session.
The device according to claim 23, wherein

When the first network session and the corresponding second network session exist simultaneously, the first network session is switched to the corresponding second network session by performing the path switching action by the second network side, or the processing unit is The first network session is released in the first network, and the handover from the first network session to the corresponding second network session is completed.
The device according to claim 33, wherein

The processing unit releases the first network session by triggering a first network session release procedure.
The method of claim 23 wherein:

The release unit initiates a deregistration process to release the connection with the first network.
The method of claim 23 wherein:

The second network session corresponding to the first network session in the first network includes:

The data flow of the first network session can be transmitted without changing the IP address on the second network session, and the quality of service QoS is the same.
A system switching device without an inter-system interface, comprising: a sending unit;

The sending unit is configured to send, to the terminal in the single-registration SR mode, predetermined information, so that the terminal initiates a handover to the second network side in the dual-registration DR mode, so that the terminal is established on the second network side. The second network session corresponding to the first network session in the first network, and completing the switching of the first network session to the second network session.
The device according to claim 37, wherein

The sending unit sends a notification message to the terminal at any time after the terminal initiates registration, so that the terminal requests, according to the notification message, that the acquired measurement threshold meets a predetermined requirement, to the second The network side initiates a handover.
The device according to claim 37, wherein

The device further includes: a determining unit;

The determining unit is configured to determine whether the acquired measurement threshold meets a predetermined requirement;

The sending unit is configured to: when the measurement threshold value meets a predetermined requirement, send a command to the terminal, including a predetermined indication, so that the terminal initiates a handover to the second network side.
The device of claim 39, wherein

The sending unit is further configured to: when the measurement threshold value meets a predetermined requirement, send a handover request Handover Required message to the access management function entity AMF, so that the AMF sends a command to the terminal, so that the terminal is configured according to the terminal The command initiates a handover to the second network side.
A system switching device without an inter-system interface, comprising: a switching unit;

The switching unit is configured to establish, when the terminal in the single-registration SR mode meets the system switching condition, initiate a handover to the second network side in the dual-registration DR mode, establishing the first network of the terminal in the first network The second network session corresponding to the session, and completing the handover from the first network session to the second network session.
The device according to claim 41, wherein

The switching unit establishes a second network session corresponding to the first network session in which the terminal preferentially switches in the first network, and respectively establishes a second network corresponding to the other first network session in the first network. After the second network sessions are respectively established, the first network sessions are respectively switched to the corresponding second network sessions.
The device according to claim 41, wherein

The switching unit establishes a second network session corresponding to the first network session in which the terminal preferentially switches in the first network, and switches the first network session of the priority switching to the corresponding second network session, and then Establishing a second network session corresponding to the other first network sessions of the terminal in the first network, and respectively switching the other first network sessions to the corresponding second network session.
The device according to claim 41, wherein

The switching unit switches the first network session to the corresponding second network session by performing a path switching action.
A computer device comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor executes the program as claimed in claims 1-22 The method of any of the preceding claims.
A computer readable storage medium having stored thereon a computer program, wherein the program is executed by a processor to implement the method of any one of claims 1-22.