CN114302463A - Network switching method, system, device and storage medium - Google Patents
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Abstract
The invention provides a network switching method, a system, equipment and a storage medium, wherein the method comprises the following steps: the first fusion network element constructs a QoS flow forwarding mapping table; the QoS flow forwarding mapping table comprises forwarding modes corresponding to different QoS flows; the forwarding mode is direct forwarding or indirect forwarding; the first convergence network element sends a session update message to the AMF network element according to the QoS flow forwarding mapping table; the AMF network element sends a switching confirmation message to a first network base station based on the received switching request and the session updating message; the switching confirmation message comprises a first forwarding mode corresponding to each QoS flow in the PDU session; the first network base station forwards each QoS flow in the PDU conversation to a second network base station in a corresponding first forwarding mode based on the switching confirmation message; the method and the device have the effects of differentiated QoS flow scheduling and priority guarantee of the key service flow; the method is favorable for guaranteeing the communication smoothness in the network switching process.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a network switching method, system, device, and storage medium.
Background
The current 5G standard is more granular with respect to 5G to 4G handover, and generally does not use fine scheduling management capability based on PDU session granularity. The traffic transfer between base stations is generally divided into two modes, direct forwarding and indirect forwarding. The direct forwarding mode is that the 5G base station (NG-RAN) directly transmits data to the 4G base station (E-UTRAN), and the indirect forwarding mode is that the 5G base station transmits the data to the 4G and 5G combined fusion network element PDW-U + UPF, then transmits the data to the 4G SGW network element and finally transmits the data to the 4G base station.
The handover method cannot distinguish between a critical of Service (QoS) flow and a non-critical QoS flow scheduled within the same session. For some critical QoS flows such as control type and delay sensitive type services and non-critical QoS flows such as large bandwidth video type, if the scheduling is performed in a direct forwarding manner, network congestion and packet drop may occur, and transmission of critical service flows cannot be guaranteed.
Disclosure of Invention
The present invention provides a network switching method, system, device and storage medium, which solves the problem that the prior art cannot ensure communication smoothness during network switching.
In order to achieve the above object, the present invention provides a network switching method, which comprises the following steps:
the first fusion network element constructs a QoS flow forwarding mapping table; the QoS flow forwarding mapping table comprises forwarding modes corresponding to different QoS flows; the forwarding mode is direct forwarding or indirect forwarding;
the first convergence network element sends a session update message to the AMF network element according to the QoS flow forwarding mapping table;
the AMF network element sends a switching confirmation message to a first network base station based on the received switching request and the session updating message; the switching confirmation message comprises a first forwarding mode corresponding to each QoS flow in the PDU session; and
and the first network base station forwards each QoS flow in the PDU conversation to the second network base station in the corresponding first forwarding mode based on the switching confirmation message.
Optionally, the sending, by the first converged network element, the session update message to the AMF network element according to the QoS flow forwarding mapping table includes:
a first network base station sends a switching request to an AMF network element;
the AMF network element forwards the switching request to a first fusion network element;
and the first convergence network element sends a session update message to the AMF network element according to the switching request and the QoS flow forwarding mapping table.
Optionally, the method comprises:
a first network base station sends a switching request to an AMF network element; the switching request comprises the availability of a direct forwarding path; the direct forwarding path availability is used to characterize whether the first network base station can forward directly to the second network base station.
Optionally, the session update message includes a second forwarding manner corresponding to each QoS flow in the PDU session;
the AMF network element sends a handover confirmation message to the first network base station based on the received handover request and the session update message, including:
and the AMF network element modifies the second forwarding mode based on the availability of the direct forwarding path in the received switching request to obtain the first forwarding mode corresponding to each QoS flow.
Optionally, each QoS flow corresponds to a preset priority; in the QoS flow forwarding mapping table, when the preset priority of the QoS flow is greater than a first preset threshold, the corresponding forwarding mode is direct forwarding; when the preset priority of the QoS flow is smaller than a second preset threshold value, the corresponding forwarding mode is indirect forwarding; the second preset threshold is smaller than the first preset threshold.
Optionally, the indirect forwarding is that the first network base station sends the network traffic to a second converged network element, the second converged network element forwards the network traffic to an SGW network element, and the SGW network element forwards the network traffic to the second network base station; the direct forwarding is that the first network base station sends the network traffic to the second network base station.
Optionally, the method comprises:
and the first fusion network element expands the content of the first initial cell according to the QoS flow forwarding mapping table to generate a session updating message.
Optionally, the method comprises:
and the AMF network element expands the content of the second initial cell according to the first forwarding mode corresponding to each QoS flow to generate a switching confirmation message.
Optionally, the first network base station is a 5G base station, and the second network base station is a 4G base station.
The invention also provides a network switching system, which is used for realizing the network switching method and comprises the following steps:
the QoS flow forwarding mapping table establishing module is used for establishing a QoS flow forwarding mapping table by the first fusion network element; the QoS flow forwarding mapping table comprises forwarding modes corresponding to different QoS flows; the forwarding mode is direct forwarding or indirect forwarding;
the session update message sending module is used for sending the session update message to the AMF network element by the first fusion network element according to the QoS flow forwarding mapping table;
a switching confirmation message sending module, configured to send, by the AMF network element, a switching confirmation message to the first network base station based on the received switching request and the session update message; the switching confirmation message comprises a first forwarding mode corresponding to each QoS flow in the PDU session; and
and the first network base station forwards each QoS flow in the PDU session to the second network base station in a corresponding first forwarding mode based on the switching confirmation message.
The present invention also provides a network switching device, including:
a processor;
a memory having stored therein an executable program of the processor;
wherein the processor is configured to perform the steps of any of the above network handover methods via execution of the executable program.
The present invention also provides a computer readable storage medium for storing a program which, when executed by a processor, performs the steps of any of the above-described network handover methods.
Compared with the prior art, the invention has the following advantages and prominent effects:
the network switching method, the system, the equipment and the storage medium realize the switching granularity based on the QoS Flow for the Flow transfer between the base stations during the network switching, and the 5G base station can directly or indirectly forward the Flow to the 4G base station based on the QoS Flow granularity and directly dispatch part of the key QoS Flow; non-key QoS flow is dispatched in an indirect mode, so that the effects of differentiated QoS flow dispatching and priority guarantee of key service flow are achieved; the method is favorable for guaranteeing the communication smoothness in the network switching process.
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Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a network handover method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of two forwarding modes of network traffic between 4G/5G base stations during network handover;
fig. 3 is a schematic diagram of a network handover method according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network switching system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a session update message sending module in a network switching system according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a network switching device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a computer-readable storage medium according to an embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
As shown in fig. 1, an embodiment of the present invention discloses a network switching method, which includes the following steps:
s110, the first convergence network element constructs a QoS flow forwarding mapping table. The QoS (Quality of Service) flow forwarding mapping table includes forwarding modes corresponding to different QoS flows. The forwarding mode is direct forwarding or indirect forwarding.
Each QoS flow corresponds to a predetermined priority, which is also an attribute of the QoS flow. In the QoS flow forwarding mapping table, when the preset priority of the QoS flow is greater than a first preset threshold, the corresponding forwarding mode is direct forwarding. When the preset priority of the QoS flow is smaller than a second preset threshold value, the corresponding forwarding mode is indirect forwarding; the second preset threshold is smaller than the first preset threshold. Therefore, the QoS Flow (namely QoS Flow) with high priority can be guaranteed preferentially, and an operator can avoid that the larger and low-priority flows among the base stations are all transmitted in a direct forwarding mode when switching from 5G to 4G, so that network congestion is caused. The problem that the prior art cannot distinguish the QoS flows guaranteed by different QoS indexes in the same session in a differentiated mode is solved, the differentiated requirements of the user services are met, the services such as the slice services are guaranteed, and the win-win situation of operators and users is achieved.
Referring to fig. 2, in the present embodiment, when the terminal 11 initiates a network handover, the network communication with the first network base station 12 is switched to the network communication with the second network base station 13. In order to ensure smooth communication in the network handover process, the first network base station 12 needs to send the cache traffic to the second network base station 13, that is, send the cache traffic in a direct forwarding manner or an indirect forwarding manner. The indirect forwarding manner is that the first network base station 12 sends the network traffic to the second converged network element, the second converged network element forwards the network traffic to the SGW network element, and the SGW network element forwards the network traffic to the second network base station 13. The direct forwarding is that the first network base station 12 sends the network traffic to the second network base station 13.
In this embodiment, the first converged network element and the second converged network element are both network elements that support 5G communication and 4G communication simultaneously. The first convergence network element is a convergence network element including an SMF (Session Management Function) + PGW-C (PDN Gateway Control plane). The second convergence network element is a convergence network element including a User Plane Function (UPF) + a Packet Data Network (PDN) w-U (PDN Gateway User Plane).
That is, in this embodiment, the PGW-C + SMF network element may determine a unique QoS Flow according to a PDU (Packet Data Unit) session ID and a QFI (i.e., an ID corresponding to each QoS Flow). Each QoS Flow has different QoS attributes including, but not limited to, priority. The PGW-C + SMF network element may generate a QoS Flow forwarding mapping table according to a plurality of ways, including but not limited to local configuration, PCF (Policy Control Function) delivery, NWDAF prediction modification, third party capability open call, and the like, to implement a forwarding way of configuring each QoS Flow switching Flow. Table 1 exemplarily shows a QoS flow forwarding mapping table.
Table 1QoS flow forwarding mapping table
| Serial number | SUPI | PDU session ID | QFI | Switching transmission modes |
| 1 | 46003123 | 1 | 1 | direct |
| 2 | 46003123 | 1 | 2 | indirect |
| 3 | 46003123 | 2 | 1 | indirect |
| … |
SUPI (Subscription Permanent Identifier) in table 1 is a 5G globally unique user Permanent Identifier assigned to each user. If the switching transmission mode is direct, the switching transmission mode is a direct forwarding mode. If the handover transmission mode is indiect, it means that it is an indirect forwarding mode. QFI indicates the ID corresponding to each QoS Flow.
And S120, the first convergence network element sends a session update message to the AMF network element according to the QoS flow forwarding mapping table. The session update message includes a second forwarding mode corresponding to each QoS flow in the PDU session.
That is, when the terminal 11 initiates network handover, the first convergence network element may obtain all QoS flows included in each PDU session, including the QFI corresponding to each QoS flow. Then, according to the QoS flow forwarding mapping table, a corresponding handover transmission mode (i.e., the second forwarding mode) can be uniquely determined according to the PDU session ID and the QFI, and the handover transmission mode is packaged in the session update message and transmitted. That is, when the terminal initiates handover, the SMF network element not only carries the QFIs in all sessions, but also carries the second forwarding mode corresponding to each QFI when returning to the AMF network element session update message. The second forwarding mode is direct forwarding or indirect forwarding.
In this embodiment, the first convergence network element expands the first initial cell content of the standard message flow in the prior art according to the QoS flow forwarding mapping table, and generates a session update message. That is, the first initial cell content is a standard cell content returned by the first convergence network element to an AMF (Access and Mobility Management function) network element in the prior art, and since the first initial cell content of the existing standard message flow does not carry a forwarding manner corresponding to each QoS flow, after the application is extended, a session update message not only carries QFIs in all sessions, but also carries a second forwarding manner corresponding to each QFI. The second forwarding mode is direct forwarding or indirect forwarding.
Therefore, fine-grained Flow forwarding control based on QoS Flow can be realized, instead of coarse-grained forwarding control based on PDU conversation, and the effects of differentiated QoS Flow scheduling and priority guarantee of key service Flow are achieved; the method is favorable for guaranteeing the communication smoothness in the network switching process.
It should be noted that, regarding the message flow when the 5G is switched to the 4G in the prior art, that is, the above-mentioned standard message flow in the prior art, details are not repeated in this application. The specific implementation can be implemented by referring to the prior art.
The PDU session mentioned above in the present application refers to a session on the core network side. The PDU session is a session between the second converged network element and the first network base station; and/or a session between the second converged network element and the SGW network element; and/or a session between the SGW network element and a second network base station.
As shown in fig. 3, in the present embodiment, the step S120 includes:
s121, the first network base station sends a switching request to the AMF network element. The handover request includes Direct Forwarding Path Availability (i.e., Direct Forwarding Path Availability). The above direct forwarding path availability is used to characterize whether the first network base station can forward directly to the second network base station. The value of direct forwarding path availability is of the enumerated type. Exemplarily, when the value is direct path available, the PDU session indicates that a direct forwarding manner is supported; otherwise, the PDU session is only supported by the indirect forwarding mode.
And S122, the AMF network element forwards the switching request to the first converged network element.
And S123, the first convergence network element sends a session update message to the AMF network element according to the switching request and the QoS flow forwarding mapping table.
That is, after receiving the handover request from the terminal, the first convergence network element generates a session update message according to the QoS flow forwarding mapping table, and sends the session update message to the AMF network element.
S130, the AMF network element sends a handover confirmation message to the first network base station based on the received handover request and the session update message. The switching confirmation message contains a first forwarding mode corresponding to each QoS flow in the PDU conversation. Specifically, step S130 includes:
s131, the AMF network element modifies the second forwarding manner based on the availability of the direct forwarding path in the received handover request, and obtains the first forwarding manner corresponding to each QoS flow.
S132, the AMF network element expands the content of the second initial cell of the existing standard message flow according to the first forwarding mode corresponding to each QoS flow, and generates a switching confirmation message.
Specifically, the AMF network element needs to modify the QoS Flow forwarding manner in the session update message sent from the SMF network element according to the support of the 4G/5G base station switching forwarding direct manner, and finally sends the modified QoS Flow forwarding manner to the 5G base station. When the direct forwarding path availability indicates that direct forwarding is supported, the second forwarding manner corresponding to each QoS flow in the session update message remains unchanged. When the switching request does not include the availability of the direct forwarding path or the carried availability of the direct forwarding path indicates that only indirect forwarding is supported, all forwarding modes corresponding to the QoS flows in the session update message are modified into indirect forwarding modes (i.e., indiect), that is, a first forwarding mode corresponding to each QoS flow is obtained.
The second initial cell content is the standard cell content returned by the AMF network element to the first network base station in the prior art. Because the second initial cell content of the existing standard message Flow does not carry the forwarding mode corresponding to each QoS Flow, after the application is expanded, the obtained switching confirmation message will contain the first forwarding mode corresponding to each QoS Flow, so that fine-grained Flow forwarding control based on QoS Flow can be realized, instead of coarse-grained forwarding control based on PDU session, and the effects of differentiated QoS Flow scheduling and priority guarantee of key service flows are achieved; the method is favorable for guaranteeing the communication smoothness in the network switching process.
S140, the first network base station forwards each QoS flow in the PDU session to the second network base station in the corresponding first forwarding manner based on the handover confirmation message. Then, the second network base station forwards to the terminal. That is, a QoS Flow can be uniquely determined according to the PDU session ID and the QoS Flow ID, and each QoS Flow can be forwarded in a forwarding manner corresponding to the QoS Flow, so that each QoS Flow in all PDU sessions can complete Flow forwarding during handover by the method of the present application.
In this embodiment, the first network base station is a 5G base station, and the second network base station is a 4G base station. The present application is not limited thereto. In another embodiment, the first network base station may be a 6G base station, and the second network base station may be a 5G base station.
The following specifically illustrates the working flow of the network handover method proposed in the present application by using two embodiments.
Example one
S201, the 5G base station initiates a switching request, and the channel directing Path Availability in the switching request is Direct Path Availability. In this case, it is explained that both the direct forwarding scheme and the indirect forwarding scheme support. In addition, the remaining steps are the same as the standard message flow of the prior art.
And S202, the PGW-C + SMF network element expands the content of the first initial cell sent by the PGW-C + SMF network element to the AMF network element in the standard message flow in the prior art according to the Forwarding Mode in the QoS flow Forwarding mapping table, namely, for each QFI, the Forwarding Path Mode of the switching Forwarding Mode is increased. For example, the message should carry PDU Session ID 1, [ (QFI 1, Forwarding Path Mode direct), (QFI 2, Forwarding Path Mode direct) ].
S203, the AMF network element sends a switching control message to the 5G base station. The Data forwarding tunnel info (Data forwarding tunnel information) includes N3 tunnel information of a Session with PDU Session ID 1. Each QFI in the QoS Flow to be Forwarded List is added with a Forwarding Path Mode, such as [ (QFI ═ 1, Forwarding Path Mode ═ direct), (QFI ═ 2, Forwarding Path Mode ═ direct) ].
And S204, the 5G base station forwards the downlink Flow by using a direct or indirect Mode based on the Forwarding Path Mode of each QoS Flow. The remaining steps are the same as the standard message flow of the prior art.
S205, according to the above steps S201 to S204 in this embodiment, all QoS flows in the session with PDU session ID 2 are switched.
Example two
S301, the 5G base station initiates a switching request, and the switching request does not carry a cell Direct Forwarding Path Availability. In this case, it is explained that only the indirect forwarding scheme is supported between the 5G base station and the 4G base station. In addition, the remaining steps are the same as the standard message flow of the prior art.
And S302, the PGW-C + SMF network element expands the content of the first initial cell sent by the PGW-C + SMF network element to the AMF network element in the standard message flow in the prior art according to the Forwarding Mode in the QoS flow Forwarding mapping table, namely, for each QFI, the Forwarding Path Mode of the QFI is increased. For example, the message should carry PDU Session ID 1, [ (QFI 1, Forwarding Path Mode direct), (QFI 2, Forwarding Path Mode direct) ].
S303, since the AMF network element obtains, according to the message of the handover request, the following information: the 5G base station does not support a direct forwarding mode, so that indirect forwarding modes are adopted. The AMF sends a switching control message to the 5G base station, wherein the Data forwarding tunnel info contains N3 tunnel information of a Session with PDU Session ID being 1; each QFI in the QoS Flow to be Forwarded List is added with a Forwarding Path Mode, such as [ (QFI ═ 1, Forwarding Path Mode ═ index), (QFI ═ 2, Forwarding Path Mode ═ index) ].
S304, the 5G base station forwards the downlink Flow by using an indirect Mode based on the Forwarding Path Mode of each QoS Flow. The remaining steps are the same as the standard message flow of the prior art.
S305, according to the above steps S301 to S304 in this embodiment, all QoS flows in the session with PDU session ID 2 are switched.
It should be noted that all the above embodiments disclosed in the present application can be freely combined, and the technical solutions obtained by combining them are also within the scope of the present application.
As shown in fig. 4, an embodiment of the present invention further discloses a network switching system 4, which includes:
the QoS flow forwarding mapping table establishing module 41 is configured to establish a QoS flow forwarding mapping table by the first converged network element. The QoS flow forwarding mapping table comprises forwarding modes corresponding to different QoS flows; the forwarding mode is direct forwarding or indirect forwarding.
And a session update message sending module 42, where the first converged network element sends the session update message to the AMF network element according to the QoS flow forwarding mapping table.
And a handover confirmation message sending module 43, where the AMF network element sends a handover confirmation message to the first network base station based on the received handover request and the session update message. The switching confirmation message contains a first forwarding mode corresponding to each QoS flow in the PDU conversation. And
and a buffered traffic sending module 44, configured to forward, by the first network base station, each QoS flow in the PDU session to the second network base station in the corresponding first forwarding manner based on the handover confirmation message.
It is understood that the network switching system of the present invention further includes other existing functional modules that support the operation of the network switching system. The network switching system shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
The network switching system in this embodiment is used to implement the network switching method, so for the specific implementation steps of the network switching system, reference may be made to the description of the network switching method, and details are not described here again.
As shown in fig. 5, in another embodiment of the present application, on the basis of the above-mentioned fig. 4 embodiment, the session update message sending module 42 includes:
the handover request initiating unit 421, the first network base station sends a handover request to the AMF network element. The handover request includes direct forwarding path availability. The above direct forwarding path availability is used to characterize whether the first network base station can forward directly to the second network base station. The value of direct forwarding path availability is of the enumerated type. Exemplarily, when the value is direct path available, the PDU session indicates that a direct forwarding manner is supported; otherwise, the PDU session is only supported by the indirect forwarding mode.
The handover request forwarding unit 422, the AMF network element forwards the handover request to the first converged network element.
And an update message generating unit 423, where the first converged network element sends a session update message to an AMF network element according to the handover request and the QoS flow forwarding mapping table.
The embodiment of the invention also discloses a network switching device, which comprises a processor and a memory, wherein the memory stores the executable program of the processor; the processor is configured to perform the steps of the above described network handover method via execution of an executable program. Fig. 6 is a schematic structural diagram of a network switching device disclosed in the present invention. An electronic device 600 according to this embodiment of the invention is described below with reference to fig. 6. The electronic device 600 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 6, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one memory unit 620, a bus 630 connecting the different platform components (including the memory unit 620 and the processing unit 610), a display unit 640, etc.
Wherein the storage unit stores program code which can be executed by the processing unit 610, such that the processing unit 610 performs the steps according to various exemplary embodiments of the present invention described in the above-mentioned network switching method section of the present specification. For example, processing unit 610 may perform the steps as shown in fig. 1.
The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.
The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may 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) via the network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.
The invention also discloses a computer readable storage medium for storing a program, which when executed implements the steps in the network switching method. In some possible embodiments, the various aspects of the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the invention described in the above-mentioned network handover methods of this specification when the program product is run on the terminal device.
As described above, the program of the computer-readable storage medium of this embodiment, when executed, implements QoS Flow-based handover granularity for traffic transfer between base stations at network handover, and the 5G base station may forward to the 4G base station in a direct or indirect manner based on the QoS Flow granularity, and schedule a portion of the critical QoS Flow in a direct manner; non-key QoS flow is dispatched in an indirect mode, so that the effects of differentiated QoS flow dispatching and priority guarantee of key service flow are achieved; the method is favorable for guaranteeing the communication smoothness in the network switching process.
Fig. 7 is a schematic structural diagram of a computer-readable storage medium of the present invention. Referring to fig. 7, a program product 800 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
The network switching method, the system, the equipment and the storage medium provided by the embodiment of the invention realize the switching granularity based on the QoS Flow for the Flow transfer between the base stations during the network switching, and the 5G base station can directly or indirectly forward the switching granularity to the 4G base station based on the QoS Flow granularity and directly schedule part of the key QoS Flow; non-key QoS flow is dispatched in an indirect mode, so that the effects of differentiated QoS flow dispatching and priority guarantee of key service flow are achieved; the method is favorable for guaranteeing the communication smoothness in the network switching process.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (12)
1. A network switching method is characterized by comprising the following steps:
the first fusion network element constructs a QoS flow forwarding mapping table; the QoS flow forwarding mapping table comprises forwarding modes corresponding to different QoS flows; the forwarding mode is direct forwarding or indirect forwarding;
the first convergence network element sends a session update message to the AMF network element according to the QoS flow forwarding mapping table;
the AMF network element sends a switching confirmation message to a first network base station based on the received switching request and the session updating message; the switching confirmation message comprises a first forwarding mode corresponding to each QoS flow in the PDU session; and
and the first network base station forwards each QoS flow in the PDU conversation to the second network base station in the corresponding first forwarding mode based on the switching confirmation message.
2. The network handover method of claim 1, wherein the sending, by the first converged network element, the session update message to the AMF network element according to the QoS flow forwarding mapping table comprises:
a first network base station sends a switching request to an AMF network element;
the AMF network element forwards the switching request to a first fusion network element;
and the first convergence network element sends a session update message to the AMF network element according to the switching request and the QoS flow forwarding mapping table.
3. The network handover method of claim 1, wherein the method comprises:
a first network base station sends a switching request to an AMF network element; the switching request comprises the availability of a direct forwarding path; the direct forwarding path availability is used to characterize whether the first network base station can forward directly to the second network base station.
4. The network switching method according to claim 3, wherein the session update message includes a second forwarding manner corresponding to each QoS flow in the PDU session;
the AMF network element sends a handover confirmation message to the first network base station based on the received handover request and the session update message, including:
and the AMF network element modifies the second forwarding mode based on the availability of the direct forwarding path in the received switching request to obtain the first forwarding mode corresponding to each QoS flow.
5. The network switching method of claim 1, wherein each QoS flow corresponds to a predetermined priority; in the QoS flow forwarding mapping table, when the preset priority of the QoS flow is greater than a first preset threshold, the corresponding forwarding mode is direct forwarding; when the preset priority of the QoS flow is smaller than a second preset threshold value, the corresponding forwarding mode is indirect forwarding; the second preset threshold is smaller than the first preset threshold.
6. The network handover method of claim 1, wherein the indirect forwarding is that a first network base station sends network traffic to a second converged network element, the second converged network element forwards the network traffic to an SGW network element, and the SGW network element forwards the network traffic to a second network base station; the direct forwarding is that the first network base station sends the network traffic to the second network base station.
7. The network handover method of claim 1, wherein the method comprises:
and the first fusion network element expands the content of the first initial cell according to the QoS flow forwarding mapping table to generate a session updating message.
8. The network handover method of claim 4, wherein the method comprises:
and the AMF network element expands the content of the second initial cell according to the first forwarding mode corresponding to each QoS flow to generate a switching confirmation message.
9. The network handover method of claim 1, wherein the first network base station is a 5G base station and the second network base station is a 4G base station.
10. A network switching system for implementing the network switching method according to claim 1, the system comprising:
the QoS flow forwarding mapping table establishing module is used for establishing a QoS flow forwarding mapping table by the first fusion network element; the QoS flow forwarding mapping table comprises forwarding modes corresponding to different QoS flows; the forwarding mode is direct forwarding or indirect forwarding;
the session update message sending module is used for sending the session update message to the AMF network element by the first fusion network element according to the QoS flow forwarding mapping table;
a switching confirmation message sending module, configured to send, by the AMF network element, a switching confirmation message to the first network base station based on the received switching request and the session update message; the switching confirmation message comprises a first forwarding mode corresponding to each QoS flow in the PDU session; and
and the first network base station forwards each QoS flow in the PDU session to the second network base station in a corresponding first forwarding mode based on the switching confirmation message.
11. A network switching device, comprising:
a processor;
a memory having stored therein an executable program of the processor;
wherein the processor is configured to perform the steps of the network handover method of any one of claims 1 to 9 via execution of the executable program.
12. A computer-readable storage medium storing a program which, when executed by a processor, performs the steps of the network handover method of any one of claims 1 to 9.
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