CN112566200B - Method for maintaining service continuity of access point, router device and storage medium - Google Patents
Method for maintaining service continuity of access point, router device and storage medium Download PDFInfo
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- CN112566200B CN112566200B CN202011407087.6A CN202011407087A CN112566200B CN 112566200 B CN112566200 B CN 112566200B CN 202011407087 A CN202011407087 A CN 202011407087A CN 112566200 B CN112566200 B CN 112566200B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
Abstract
A method for maintaining service continuity of an access point, a router device and a storage medium are provided, wherein the method for maintaining service continuity of the access point comprises the following steps: receiving route change information sent by an access point; the routing change information is sent by the access point when the access point receives that the terminal equipment executes access point reselection or the access point executes switching to the terminal equipment; and after the route replacement information is determined to be received, switching the route direction corresponding to the terminal equipment from the source access point to the target access point. The scheme can keep the ongoing service continuity of the terminal equipment when the access point is switched.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method for maintaining service continuity of an access point, a router device, and a storage medium.
Background
In a 3gpp 5G NR network, a terminal device obtains an IP address through Session Management signaling (Session Management signaling). Specifically, the terminal device sends a PDU Session ESTABLISHMENT REQUEST to a Session Management Function (SMF), the SMF feeds back a corresponding PDU Session ESTABLISHMENT REQUEST to the terminal device after receiving the PDU Session ESTABLISHMENT REQUEST, and the PDU Session ESTABLISHMENT REQUEST carries an IP address allocated to the terminal device.
In the WIFI network, an IP address is dynamically allocated to the terminal device through a Dynamic Host Configuration Protocol (DHCP), or a network administrator allocates a static IP address to the terminal device.
The internal data of the 5G network is QoS flow, the external data is IP network, the network distribution is complex, and the cost is high. The WIFI network is an all-IP network, and the network distribution is convenient. However, the WIFI network has the problems of poor service continuity, long time delay and the like. Therefore, the industry proposes all-IP networks using 4G/5G wireless technology. In the existing all-IP network, when the terminal device performs access point replacement, the service continuity is poor.
Disclosure of Invention
The embodiment of the invention solves the technical problem of poor service continuity when the terminal equipment switches the access point.
To solve the foregoing technical problem, an embodiment of the present invention provides a method for maintaining service continuity of an access point, including: receiving route change information sent by an access point; the routing change information is sent by the access point when the access point receives that the terminal equipment executes access point reselection or the access point executes switching to the terminal equipment; and switching the route direction corresponding to the terminal equipment from the source access point to the target access point.
Optionally, the route replacement information includes current IP address information of the terminal device.
Optionally, the terminal device is in an idle state, the terminal device performs access point reselection, and the receiving the route change information sent by the access point includes: and receiving route replacement information sent by the target access point, wherein the route replacement information is sent by the target access point after receiving the association request of the terminal equipment.
Optionally, the terminal device is in a connected state, the access point performs handover on the terminal device, and the receiving of the route change information sent by the access point includes: and receiving the route change information sent by the target access point, wherein the route change information is sent by the target access point in the switching process or when the switching is completed.
Optionally, the terminal device is in a connected state, the access point performs handover on the terminal device, and the receiving of the route change information sent by the access point includes: and receiving the route change information sent by the source access point, wherein the route change information is sent by the target access point in the switching process or when the switching is completed.
Optionally, the terminal device is in a connected state, the access point performs handover on the terminal device, and the receiving of the route change information sent by the access point includes: receiving route change information sent by at least one of the target access point and the source access point, where the route change information is: during and after the switching, the target access point and the source access point transmit at least one of the target access point and the source access point; receiving route change information sent by at least one of the target access point and the source access point, where the route change information is: during and after the switching, the target access point and the source access point transmit at least one of the target access point and the source access point;
optionally, before determining that the handover message is received, the method further includes: and acquiring the current IP address of the terminal equipment, and adding a route to the current IP address and directing the current IP address to the source access point.
Optionally, the obtaining the current IP address of the terminal device includes: receiving the current IP address of the terminal equipment sent by an access and mobility management functional unit; and the access and mobility management functional unit allocates an IP address to the terminal equipment when receiving a registration request sent by the terminal equipment, and the IP address is used as the current IP address of the terminal equipment.
Optionally, the method for maintaining service continuity by the access point further includes: receiving a route deletion notification sent by the access and mobility management functional unit, and deleting the route corresponding to the current IP address; the deletion of the route notification is sent by the access and mobility management functional unit when any one of the following conditions is met: and receiving a de-registration request sent by the terminal equipment, and detecting that the periodic registration request of the terminal equipment is not received within a preset time length.
In order to solve the above technical problem, an embodiment of the present invention further provides a router device, including: a replacement information receiving unit for receiving the route replacement information sent by the access point; the routing change information is sent when the access point receives that the terminal equipment executes access point reselection or the access point executes switching to the terminal equipment; and the switching unit is used for switching the route direction corresponding to the terminal equipment from the source access point to the target access point.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of any of the above methods for maintaining service continuity for an access point.
An embodiment of the present invention further provides a router device, which includes a memory and a processor, where the memory stores a computer program that is executable on the processor, and the processor executes, when executing the computer program, the steps of any one of the foregoing methods for maintaining service continuity by an access point.
The embodiment of the invention also provides another method for maintaining service continuity of the access point, which comprises the following steps: when detecting that the terminal equipment performs access point reselection or performs switching on the terminal equipment, sending route replacement information to the router equipment, so that the router equipment switches the route direction corresponding to the terminal equipment from a source access point to a target access point.
An embodiment of the present invention further provides an access point device, including: the sending unit is configured to send route change information to the router device when detecting that the terminal device performs access point reselection or performs handover on the terminal device, so that the router device switches a route direction corresponding to the terminal device from a source access point to a target access point.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the above method for maintaining service continuity by an access point.
The embodiment of the present invention further provides an access point device, which includes a memory and a processor, where the memory stores a computer program executable on the processor, and the processor executes the steps of the above method for maintaining service continuity of an access point when executing the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
and the access point sends the route replacement information to the router when receiving that the terminal equipment executes access point reselection or the access point executes switching to the terminal equipment. And after receiving the route replacement information sent by the access point, the router switches the route direction corresponding to the terminal equipment from the source access point to the target access point. The router realizes the switching of the terminal equipment route, and can effectively maintain the service continuity.
Further, the access and mobility management functional unit acquires the current IP address of the terminal device, and sends the current IP address of the terminal device to the router, so that the router adds a route to the current IP address of the terminal device and directs the current IP address of the terminal device to the corresponding access point. Since the current IP address of the terminal device is acquired without involvement of SMF, the structure of an all-IP network using 4G/5G wireless technology can be simplified.
Drawings
Fig. 1 is a flowchart of a method for maintaining service continuity of an access point according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a router device in an embodiment of the present invention.
Detailed Description
When the terminal device performs access point reselection or access point handover, since the terminal device needs to disconnect the currently residing source access point first, the terminal device reselects or switches to a new access point (target access point). In the process of reselecting or switching to the target access point, a more complicated reselection or switching process is required, and therefore, a problem of poor service continuity may exist therein.
In the embodiment of the invention, when receiving that the terminal equipment executes the access point reselection or the access point executes the switching to the terminal equipment, the access point sends the route replacement information to the router. And after receiving the route replacement information sent by the access point, the router switches the route direction corresponding to the terminal equipment from the source access point to the target access point. The router realizes the switching of the terminal equipment route, and can effectively maintain the service continuity.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a method for maintaining service continuity of an access point, which is described in detail below with reference to fig. 1 through specific steps.
Step S101, receiving the route replacement information sent by the access point.
In specific implementation, the terminal device is assigned a current IP address during the boot-up registration process, and the current IP address is added with a route pointing to an Access Point (AP) where the terminal device is located.
In a specific implementation, the current IP address of the terminal device may be previously assigned to the terminal device by the network management device. When the terminal device is accessed to the network, the network administrator can allocate an IP address to the terminal device through the network management device. Typically, the IP address configured for the terminal device by the network administrator is fixed. That is, when the terminal device accesses the network, the corresponding current IP address is fixed.
For example, when the terminal device accesses the network, the IP address allocated to the terminal device by the network administrator through the network management device is 192.168.10.11, and the current IP address of the terminal device is fixed to 192.168.10.11.
In a specific implementation, the IP address of the terminal device may also be dynamically allocated. As known in the art, a current IP address may be allocated to a terminal device through a Dynamic Host Configuration Protocol (DHCP). DHCP is a network protocol of local area network, a server controls a segment of IP address range, when the terminal equipment logs in the server, the current IP address and subnet mask distributed by the server can be automatically obtained.
When the terminal device logs in the server at different times, the corresponding current IP addresses of the terminal device can be different.
In the embodiment of the present invention, the terminal device may also send a registration request to an Access and Mobility management Function (AMF). After receiving the registration request, the AMF dynamically allocates an IP address corresponding to the terminal device, and issues a registration accept (registration accept) to the terminal device. And the terminal equipment receives the registration reception issued by the AMF, namely the IP address carried in the registration reception can be used as the current IP address of the terminal equipment.
In a specific implementation, after acquiring the current IP address of the terminal device, the AMF may send the current IP address of the terminal device to a Router device (Router), so that the Router device adds a route to the current IP address of the terminal device and directs the current IP address to a corresponding Access Point (AP).
In the embodiment of the present invention, the AMF may send an add route request (add route request) to the router device, where the add route request carries the current IP address of the terminal device and the IP address of the access point corresponding to the terminal device. After receiving the route adding request sent by the AMF, the router device may send a route adding acknowledgement to the AMF, where the route adding acknowledgement corresponds to the route adding request to inform that the AMF has added the current IP address of the terminal device and the IP address of the access point corresponding to the current IP address to the routing table.
In the existing 3gpp 5G NR network, the terminal device obtains an IP address through Session Management signaling (Session Management signaling). Specifically, the terminal device sends a PDU Session ESTABLISHMENT REQUEST to a Session Management Function (SMF), and after receiving the PDU Session ESTABLISHMENT REQUEST, the SMF feeds back a corresponding PDU Session ESTABLISHMENT ACCEPT to the terminal device, where the PDU Session ESTABLISHMENT ACCEPT carries an IP address assigned to the terminal device.
It can be understood that, in the specific implementation, there may be other methods for allocating the current IP address to the terminal device, and details of the embodiment of the present invention are not described herein.
Compared with the method for dynamically allocating the IP address to the terminal equipment through the SMF, the method for dynamically allocating the IP address to the terminal equipment allocates the IP address to the terminal equipment through the AMF without setting the SMF, so that the network structure can be simplified, and the complexity of the network equipment can be reduced.
In an implementation, when the terminal device is in an idle state (idle), it may detect that the signal quality of the neighboring access point is better than the signal quality of the current access point, and therefore, the terminal device may perform an access point reselection when detecting that the signal quality of the neighboring access point is better than the signal quality of the current access point. When the terminal device is in a connected state (connected), it may detect that the signal quality of the neighboring access point is better than that of the current access point, and therefore, the access point may perform handover on the terminal device when the signal quality of the neighboring access point is better than that of the current access point. And in the process of switching the terminal equipment, the source access point and the target access point are jointly completed.
When performing access point reselection, the terminal device may send an association request to a target access point, where the target access point is a new access point and the source access point is an access point where the terminal device currently resides. After receiving the association request sent by the terminal device, the target access point may determine that the terminal device has performed access point reselection. At this time, the target access point may transmit the route change information to the router device.
When the access point performs handover to the terminal device, the source access point or the target access point may transmit route change information to the router device.
In particular implementations, the route replacement information may include current IP address information of the terminal device.
And step S102, switching the route direction corresponding to the terminal equipment from a source access point to a target access point.
In the embodiment of the invention, when the terminal equipment in the idle state reselects the access point, the terminal equipment associates with the target access point. And the target access point sends the route replacement information to the router equipment when receiving the association request sent by the terminal equipment. And after receiving the route replacement information, the router equipment switches the route of the terminal equipment from the pointing source access point to the target access point.
In the embodiment of the present invention, when the access point performs a handover process for the terminal device in a connected state, the target access point may send the route change information to the router device, so that the router device switches the route of the terminal device from the pointing source access point to the target access point; the router device may also be configured to send route change information from the source access point to the router device to cause the router device to switch the route of the terminal device from being directed to the source access point to the target access point.
Specifically, the source access point sends the route change information to the router device during the handover. After receiving the route replacement information sent by the source access point, the router device switches the access point corresponding to the terminal device from the source access point to the target access point, thereby realizing the switching of the access points.
The target access point may also send route change information to the router device during the handover procedure. After receiving the route replacement information sent by the source access point, the router device switches the access point corresponding to the terminal device from the source access point to the target access point, thereby realizing the switching of the access points.
When the terminal device is switched to the target access point, the target access point sends the route replacement information to the router device. After receiving the route replacement information sent by the target access point, the router device switches the access point corresponding to the terminal device from the source access point to the target access point, thereby realizing the switching of the access points.
Accordingly, when the terminal device switches to the target access point, the source access point may also send the route change information to the router device. After receiving the route replacement information sent by the source access point, the router device switches the access point corresponding to the terminal device from the source access point to the target access point, thereby realizing the switching of the access points.
In a specific implementation, during the handover, at least one of the source access point and the target access point may send route change information to the router device; at least one of the source access point and the target access point may send route change information to the router device upon completion of the handover. Therefore, in the switching process and when the switching is completed, the router device receives the routing change information at least twice, and the router device can respectively send the data packets corresponding to the terminal device to the source access point and the target access point, so that the communication fluency is further ensured.
In practical applications, after the terminal device completes communication or interrupts connection with a network, if a current IP address configured for the terminal device is reserved, the IP address is wasted.
In an embodiment of the present invention, to improve the utilization rate of the IP address, after sending the current IP address of the terminal device to the router device, if a de-registration request sent by the terminal device is received, the AMF may recover the current IP address corresponding to the terminal device and send a route deletion notification to the router device. And after receiving the route deletion notification, the router equipment deletes the route corresponding to the current IP address.
In another embodiment of the present invention, if detecting that the preset time length does not receive the periodic registration request of the terminal device, the AMF recovers the current IP address corresponding to the terminal device, and sends a route deletion notification to the router device. And after receiving the notice of deleting the route, the router equipment deletes the route corresponding to the current IP address.
Referring to fig. 2, a router apparatus 20 in an embodiment of the present invention is provided, including: a replacement information receiving unit 201 and a switching unit 202, wherein:
a replacement information receiving unit 201, configured to receive route replacement information sent by an access point; the routing change information is sent when the access point receives that the terminal equipment executes access point reselection or the access point executes switching to the terminal equipment;
a switching unit 202, configured to switch a route direction corresponding to the terminal device from a source access point to a target access point.
In a specific implementation, the route replacement information includes current IP address information of the terminal device.
In a specific implementation, the terminal device is in an idle state, the terminal device performs access point reselection, and the change information receiving unit 201 may be configured to receive route change information sent by the target access point, where the route change information is sent by the target access point after receiving an association request of the terminal device.
In a specific implementation, the terminal device is in a connected state, the access point performs handover on the terminal device, and the replacement information receiving unit 201 may be configured to receive route replacement information sent by the target access point, where the route replacement information is sent by the target access point during a handover procedure or when the handover is completed.
In a specific implementation, the terminal device is in a connected state, the access point performs handover on the terminal device, and the replacement information receiving unit 201 may be configured to receive route replacement information sent by the source access point, where the route replacement information is sent by the target access point during a handover procedure or when the handover is completed.
In a specific implementation, the terminal device is in a connected state, the access point performs handover on the terminal device, and the replacement information receiving unit 201 is configured to receive route replacement information sent by at least one of the target access point and the source access point, where the route replacement information is: during and after the switching, the target access point and the source access point transmit at least one of the target access point and the source access point; and respectively sending data packets corresponding to the terminal equipment to the target access point and the source access point.
In a specific implementation, the router device 20 may further include: an obtaining unit 203, configured to obtain a current IP address of the terminal device, add a route to the current IP address, and direct the current IP address to the source access point.
In a specific implementation, the obtaining unit 203 may be configured to receive a current IP address of the terminal device sent by an access and mobility management function unit; and the access and mobility management functional unit allocates an IP address to the terminal equipment when receiving a registration request sent by the terminal equipment, and the IP address is used as the current IP address of the terminal equipment.
In a specific implementation, the router device 20 may further include: a deleted route notification receiving unit 204, configured to receive a route deletion notification sent by the access and mobility management functional unit, and delete a route corresponding to the current IP address; the deletion of the route notification is sent by the access and mobility management functional unit when any one of the following conditions is met: and receiving a de-registration request sent by the terminal equipment, and detecting that the periodic registration request of the terminal equipment is not received within a preset time length.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for maintaining service continuity by an access point described in step S101 to step S102 are executed.
The embodiment of the present invention further provides another terminal device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the random access method of the terminal device according to any one of the above embodiments when running the computer program.
In a specific implementation, the method for maintaining service continuity by an access point provided in the above embodiment is described from the router device side.
The embodiment of the invention also provides another method for maintaining service continuity of the access point, which comprises the following steps: when detecting that the terminal equipment performs access point reselection or performs switching on the terminal equipment, sending route replacement information to the router equipment, so that the router equipment switches the route direction corresponding to the terminal equipment from a source access point to a target access point.
In a specific implementation, the above method for maintaining service continuity by an access point is described from the access point side, and corresponds to the method for maintaining service continuity by an access point described from the router device side.
An embodiment of the present invention further provides an access point device, including: the router comprises a sending unit, a receiving unit and a sending unit, wherein the sending unit is used for sending route replacement information to router equipment when detecting that the terminal equipment executes access point reselection or executes switching on the terminal equipment, so that the router equipment switches the route direction corresponding to the terminal equipment from a source access point to a target access point.
Another computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method for maintaining service continuity by an access point.
The embodiment of the present invention further provides another access point device, which includes a memory and a processor, where the memory stores a computer program executable on the processor, and the processor executes the steps of the above method for maintaining service continuity of an access point when executing the computer program.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A method for maintaining service continuity of an access point, applied to a router device, is characterized by comprising the following steps: receiving route change information sent by an access point; the route replacing information is sent by the access point in the process of executing switching to the terminal equipment;
and switching the route direction corresponding to the terminal equipment from the source access point to the target access point.
2. The access point preserving service continuity method according to claim 1, wherein the route change information includes current IP address information of the terminal device.
3. The method for maintaining service continuity by an access point according to claim 1, wherein the terminal device is in a connected state, the access point performs handover to the terminal device, and the receiving the route change information sent by the access point comprises:
and receiving the route change information sent by the access point, wherein the route change information is sent by the target access point in the switching process.
4. The method for maintaining service continuity by an access point according to claim 1, wherein the terminal device is in a connected state, the access point performs handover to the terminal device, and the receiving the route change information sent by the access point comprises:
and receiving the route change information sent by the access point, wherein the route change information is sent by the source access point in the switching process.
5. The method for maintaining service continuity by an access point according to claim 1, wherein the terminal device is in a connected state, the access point performs handover to the terminal device, and the receiving the route change information sent by the access point comprises:
receiving route change information sent by at least one of the target access point and the source access point, where the route change information is: during the switching process, the target access point and at least one of the source access points transmit;
and respectively sending data packets corresponding to the terminal equipment to the target access point and the source access point.
6. The method for maintaining service continuity of the access point according to any one of claims 3 to 5, further comprising, before receiving the route change information transmitted by the access point:
and acquiring the current IP address of the terminal equipment, and adding a route to the current IP address and directing the current IP address to the source access point.
7. The method for maintaining service continuity by an access point according to claim 6, wherein the obtaining the current IP address of the terminal device comprises:
receiving the current IP address of the terminal equipment sent by an access and mobility management functional unit; and the access and mobility management functional unit allocates an IP address to the terminal equipment when receiving a registration request sent by the terminal equipment, and the IP address is used as the current IP address of the terminal equipment.
8. The method for maintaining service continuity by an access point of claim 7, further comprising: receiving a route deletion notification sent by the access and mobility management functional unit, and deleting a route corresponding to the current IP address; the deletion of the route notification is sent by the access and mobility management functional unit when any one of the following conditions is met: and receiving a de-registration request sent by the terminal equipment, and detecting that the periodic registration request of the terminal equipment is not received within a preset time length.
9. A method for maintaining service continuity of an access point is applied to an access point device, and is characterized by comprising the following steps: and in the process of detecting that the terminal equipment is switched, sending route change information to router equipment, so that the router equipment switches the route direction corresponding to the terminal equipment from a source access point to a target access point.
10. A router device, comprising:
a replacement information receiving unit for receiving the route replacement information sent by the access point; the route replacing information is sent by the access point in the process of executing switching to the terminal equipment;
and the switching unit is used for switching the route direction corresponding to the terminal equipment from the source access point to the target access point.
11. An access point device, comprising:
the sending unit is used for sending the route replacement information to the router equipment in the process of detecting that the terminal equipment is switched, so that the router equipment switches the route direction corresponding to the terminal equipment from a source access point to a target access point.
12. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, which, when executed by a processor, performs the steps of the method for maintaining service continuity by an access point according to any one of claims 1 to 8.
13. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the method for maintaining service continuity by an access point of claim 9.
14. A router device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the method for maintaining service continuity by an access point of any one of claims 1 to 8.
15. An access point device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the access point maintain service continuity method of claim 9.
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| CN104427567B (en) * | 2013-09-04 | 2019-10-01 | 南京中兴新软件有限责任公司 | Realize the mobile method and system of IP, access point apparatus, Radio Access Controller |
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