WO2017113987A1

WO2017113987A1 - Data gateway selection method and device, and mobility management entity

Info

Publication number: WO2017113987A1
Application number: PCT/CN2016/104754
Authority: WO
Inventors: 陈艳梅
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-12-29
Filing date: 2016-11-04
Publication date: 2017-07-06
Also published as: CN106937276A

Abstract

Disclosed are a data gateway selection method and device, and a mobility management entity. The method comprises: after receiving a handover request, from a user equipment, for accessing a 3GPP from a non-3GPP, acquiring data gateway identification information assigned to the user equipment; and then, when it is determined that fully qualified domain name information is contained in the data gateway identification information, performing domain name resolution according to the fully qualified domain name information so as to obtain first data gateway IP address information. That is to say, in the present invention, when fully qualified domain name information is contained in data gateway identification information, the fully qualified domain name information is preferably used for resolution to obtain first data gateway IP address information. The IP address information is generally a data gateway IP address of an S5/S8 interface, rather than preferentially adopting an IP address contained in a PGWID as a data gateway IP address. Therefore, the success rate of accessing a 3GPP from a non-3GPP can be improved.

Description

Data gateway selection method, device and mobility management entity

Technical field

The present invention relates to the field of communications, and in particular, to a data gateway selection method and apparatus, and a mobility management entity.

Background technique

In the LTE network, when the request type of the UE (User Equipment, User Equipment) is the access of the handover request, the HSS (Home Subscriber Server) subscription data includes the dynamically assigned PGWID (PDN GW identity). If the PGWID contains an IP address, the MME (Mobility Management Entity, Mobility Management Entity) will use the address as the IP address of the data gateway PGW, and the PGW selection will not be performed. However, the S2a port of the PGW (the interface between the PGW and the non-3GPP) and the S5/S8 port (the interface between the PGW and the Serving GW) may have different addresses, and the IP address included in the PGWID is the IP address of the PGW S2a port, so if directly Using this IP address as the PGW IP address of the S5/S8 port may cause access to 3GPP to fail.

Summary of the invention

The main technical problem to be solved by the present invention is to provide a data gateway selection method and apparatus, and a mobility management entity, which solves the problem that an existing user equipment directly uses an IP address included in a PGWID as a data gateway when accessing 3GPP from a non-3GPP. The address is easy to cause the access failure.

To solve the above technical problem, the present invention provides a data gateway selection method, including:

Receiving a handover request from a user equipment by a non-3GPP access 3GPP;

Obtaining data gateway identification information allocated for the user equipment;

When the data gateway identification information includes the full name domain name information, the domain name resolution is performed according to the full name domain name information to obtain the first data gateway IP address information.

In an embodiment of the present invention, when the data gateway identification information does not include the full name domain name information and includes the IP address information, the IP address information is obtained as the second data gateway IP address information.

In an embodiment of the present invention, after obtaining the IP address information of the first data gateway, the method further includes:

And accessing the 3GPP according to the first data gateway IP address information, if the access fails, and acquiring the IP address information as the second data gateway IP address information when the data gateway identifier information includes the IP address information.

In an embodiment of the present invention, after obtaining the second data gateway IP address information, the method further includes:

Accessing 3GPP according to the second data gateway IP address information;

If the access fails, the access point name of the user equipment is obtained, and the domain name is constructed according to the obtained access point name for address resolution to obtain the third data gateway IP address information.

In an embodiment of the present invention, the access to the 3GPP fails according to the first data gateway IP address information, and the access point name of the user equipment is obtained when the data gateway identification information does not include the IP address information. ;

The third domain gateway IP address information is obtained by constructing a domain name according to the obtained access point name for address resolution.

In an embodiment of the present invention, after obtaining the third data gateway IP address information, the method further includes:

And accessing the 3GPP according to the third data gateway IP address information, and if the access fails, sending a create session request message to the selected target data gateway according to the initial request.

In an embodiment of the present invention, obtaining an access point name of the user equipment includes:

Determining whether the access request includes the access point name, if yes, acquiring the access point name; if not, obtaining the default access point name from the user equipment subscription context.

In order to solve the above problems, the present invention also provides a data gateway selection apparatus, including:

a receiving module, configured to receive a handover request from a user equipment by a non-3GPP access 3GPP;

An information acquiring module, configured to acquire, after the receiving module receives the switching request, data gateway identification information allocated for the user equipment;

The first address obtaining module is configured to: when the data gateway identification information includes the full name domain name information, perform domain name resolution according to the full name domain name information to obtain the first data gateway IP address information.

In an embodiment of the present invention, the second address obtaining module is further configured to: when the data gateway identification information does not include the full name domain name information, and include the IP address information, obtain the IP address information as the second data gateway. IP address information.

In an embodiment of the present invention, the method further includes a first access module and a third address obtaining module;

The first access module is configured to access 3GPP according to the first data gateway IP address information;

The third address obtaining module is configured to obtain the IP address information as the second data gateway IP address information when the first access module fails to access the IP address information.

In an embodiment of the present invention, the second access module and the fourth address obtaining module are further included;

The second access module is configured to access 3GPP according to the second data gateway IP address information;

The fourth address obtaining module is configured to acquire an access point name of the user equipment when the second access module fails to access, and construct a domain name according to the obtained access point name to perform address resolution to obtain a third data gateway. IP address information.

In an embodiment of the present invention, the method further includes: a fifth address obtaining module, configured to: when the first access module fails to access, and when the data gateway identification information does not include IP address information, obtain the The access point name of the user equipment is configured according to the obtained access point name to perform domain name resolution to obtain the third data gateway IP address information.

In an embodiment of the present invention, the third access module and the initial access module are further included;

The third access module is configured to access 3GPP according to the third data gateway IP address information;

The initial access module is configured to send a create session request message to the selected target data gateway according to the initial request when the third access module fails to access.

In order to solve the above problems, the present invention also provides a mobility management entity including the data gateway selection means as described above.

The beneficial effects of the invention are:

The data gateway selection method and apparatus and the mobility management entity provided by the present invention acquire the data gateway identification information allocated for the user equipment after receiving the handover request from the user equipment by the 3GPP to access the 3GPP; and then determine the data gateway. When the identifier information includes the full name domain name information, the domain name resolution is performed according to the full name domain name information to obtain the first data gateway IP address information. In the present invention, when the data gateway identification information includes the full name domain name information, the full name domain name information is preferably used for parsing to obtain the first data gateway IP address information, where the IP address information is generally the data gateway IP address of the S5/S8 port. Rather than preferentially using the IP address contained in the PGWID as the IP address of the data gateway, the success rate of non-3GPP to 3GPP access can be improved.

DRAWINGS

1 is a schematic flowchart of a data gateway selection method according to Embodiment 1 of the present invention;

2 is a schematic structural diagram 1 of a data gateway selection apparatus according to Embodiment 2 of the present invention;

3 is a second schematic structural diagram of a data gateway selection apparatus according to Embodiment 2 of the present invention;

4 is a schematic structural diagram 3 of a data gateway selection apparatus according to Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram 4 of a data gateway selection apparatus according to Embodiment 2 of the present invention; FIG.

6 is a schematic structural diagram 5 of a data gateway selection apparatus according to Embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram 6 of a data gateway selection apparatus according to Embodiment 2 of the present invention; FIG.

8 is a schematic flowchart of a method for selecting a data gateway identifier information including a full-name domain name and an IP address according to Embodiment 3 of the present invention;

FIG. 9 is a schematic flowchart of a method for selecting a data gateway identifier information including an IP address according to Embodiment 3 of the present invention;

FIG. 10 is a schematic flowchart of a method for selecting a data gateway identifier information including only a full name domain name according to Embodiment 3 of the present invention.

detailed description

After receiving the handover request from the user equipment by the non-3GPP access 3GPP, the present invention firstly performs the domain name resolution according to the full name domain name information when the data gateway identification information PGWID allocated to the user equipment includes the full name domain name information. A data gateway IP address information, instead of preferentially using the IP address of the PGW S2a port included in the PGWID as the IP address of the data gateway, can improve the success rate of non-3GPP to 3GPP access. The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1:

Referring to FIG. 1 , the data gateway selection method provided in this embodiment includes the following steps:

Step 101: Receive a handover request Handover from a user equipment by a non-3GPP access 3GPP;

Specifically, the step of the step that the mobility management entity receives the request type of the user equipment is an attach request of the handover request;

Step 102: Acquire a data gateway identification information PGW ID allocated to the user equipment;

In this step, the mobility management entity may obtain the data gateway identifier information of the user equipment from the home subscription subscriber server. The obtaining process may be: the mobility management entity sends an update location request to the home subscription subscriber server, and the home subscription subscriber server sends the The mobility management entity feeds back an update location response, where the response message may include a data gateway identification information PGW ID;

Step 103: Determine whether the data gateway identification information contains Fully Qualified Domain Name (FQDN), and if so, go to step 104; if not, go to step 105;

Step 104: Perform local resolution or DNS query according to the full name domain information to obtain first data gateway IP address information.

Step 105: When the data gateway identification information includes IP address information, obtain the IP address information as the second data gateway IP address information.

The foregoing process preferentially obtains the first data gateway IP address information according to the full name domain name information in the data gateway identifier information, and the first data gateway IP address information is generally the data gateway IP address of the S5/S8 port; instead of preferentially adopting the PGWID The IP address of the included PGW S2a port is used as the IP address of the data gateway, so the success rate of non-3GPP to 3GPP access can be improved.

After obtaining the first data gateway IP address information through the foregoing step 104, the following access process is further included:

Obtaining the 3GPP according to the obtained first data gateway IP address information, if the access fails, and obtaining the IP address information as the second data gateway IP address information when the data gateway identification information includes the IP address information; and the data gateway identification information If the IP address information is not included, the access point name of the user equipment is obtained, and the domain name is constructed according to the obtained access point name for address resolution to obtain the third data gateway IP address information.

In the embodiment, when the first data gateway IP address information obtained by parsing the full name domain name information fails to be accessed according to the full name domain name information in the data gateway identification information, the data gateway identifier information may be further adopted. The IP address information is included as the second data gateway IP address for re-access. If the IP address information is not included in the data gateway identification information at this time, the access point name of the user equipment may be further obtained, and the domain name is configured to be parsed to obtain the third data gateway IP address information, as much as possible. Try to access successfully.

In this embodiment, after obtaining the second data gateway IP address information in the foregoing manner, the following access process is further included:

Accessing 3GPP according to the obtained second data gateway IP address information;

If the access fails, the access point name (APN) of the user equipment is obtained, and the domain name is configured according to the obtained access point name for address resolution to obtain the third data gateway IP address information.

The following steps are taken to obtain the access point name of the user equipment:

First, it is determined whether the access point sent by the user equipment includes an access point name, and if yes, the access point name is obtained; if not, the default access point name is obtained from the user equipment subscription context.

After obtaining the access point name, add MNC (Mobile Network Code) and The MCC (Mobile Country Code) constructs a domain name and parses the third data gateway IP address information.

After obtaining the third data gateway IP address information in the foregoing manner, the method further includes:

Accessing the 3GPP according to the obtained IP address information of the third data gateway, if the access fails again, the handover identifier (Handover Indication) in the Indication Flags may be further cleared, and then the IP address of the third data gateway is re-routed. The initial request sends a create session request message. To ensure that the user equipment is successfully connected to 3GPP, the user's feelings are improved.

Embodiment 2:

Referring to FIG. 2, the embodiment provides a data gateway selection device, where the data gateway selection device can be configured in a mobility management entity, including:

The receiving module 1 is configured to receive a handover request from the user equipment by the non-3GPP access 3GPP;

The information obtaining module 2 is configured to obtain, after receiving the handover request, the data gateway identifier information that is allocated to the user equipment, where the data gateway identifier information of the user equipment is obtained from the home subscription subscriber server;

The first address obtaining module 3 is configured to: when the data gateway identification information includes the full name domain name information, perform domain name resolution according to the full name domain name information to obtain the first data gateway IP address information.

Referring to FIG. 3, the data gateway selecting apparatus in this embodiment further includes a second address obtaining module 4, configured to obtain the IP address information when the data gateway identification information does not include the full name domain name information but contains the IP address information. As the second data gateway IP address information.

Referring to FIG. 4, the data gateway selecting apparatus in this embodiment further includes a first access module 5 and a third address obtaining module 6;

The first access module 5 is configured to: after the first address obtaining module 3 acquires the first data gateway IP address information, access the 3GPP according to the first data gateway IP address information;

The third address acquisition module 6 is used for access failure in the first access module 5, and when the data gateway identification information includes IP address information, the IP address information is obtained as the second data gateway IP address information.

Referring to FIG. 5, the data gateway selecting apparatus in this embodiment further includes a second access module 7 and a fourth address obtaining module 8;

The second access module 7 is configured to access the 3GPP according to the second data gateway IP address information obtained by the second address acquisition modulo 4 or the third address acquisition modulo 6;

The fourth address obtaining module 8 is configured to acquire an access point name of the user equipment when the second access module 7 fails to access, and construct a domain name according to the obtained access point name for address resolution to obtain third data gateway IP address information.

Referring to FIG. 6, the data gateway selecting apparatus in this embodiment further includes a fifth address obtaining module 9 for failing to access the first access module 5, and when the data gateway identification information does not include the IP address information. The access point name of the user equipment is obtained, and the domain name is constructed according to the obtained access point name for address resolution to obtain the third data gateway IP address information.

Referring to FIG. 7, the data gateway selecting apparatus in this embodiment further includes a third access module 10 and an initial access module 11;

The third access module 10 is configured to access the 3GPP according to the third data gateway IP address information obtained by the fifth address obtaining module 9 or the fourth address obtaining module 8;

The initial access module 11 is configured to send a create session request message to the selected target data gateway according to the initial request when the third access module fails to access. Specifically, after the handover identifier (Handover Indication) in the Indication Flags is cleared, the Create Session Request message is sent to the selected target data gateway according to the initial request. To ensure that the user equipment is successfully connected to 3GPP, the user's feelings are improved.

Embodiment 3:

For a better understanding of the present invention, in the LTE (Long Term Evolution, Long Term Evolution), the request of the current user equipment is a handover request, and the subscription data of the user equipment on the home subscription subscriber server includes the data gateway identification information as an example. Several cases where the data gateway identification information contains different information are described.

Referring to FIG. 8 , the figure shows that the data gateway identification information includes both an IP address and a full-name domain name (FQDN). The selection access process at this time includes:

Step 801: Receive a handover request Handover from a user equipment by a non-3GPP access 3GPP;

Step 802: Acquire, from the home subscription user server, the data gateway identification information PGW ID allocated for the user equipment.

Step 803: Determine that the data gateway identification information includes full name domain name information and an IP address.

Step 804: First, perform domain name resolution according to the full name domain name information to obtain the first data gateway IP address information for access;

Step 805: Determine whether the access is successful, if yes, go to step 811, if not, go to step 806;

Step 806: Obtain the IP address information included in the data gateway identifier information as the second data gateway IP address information, and access according to the second data gateway IP address information.

Step 807: Determine whether the access is successful, if yes, go to step 811, if not, go to step 808;

Step 808: Obtain an access point name of the user equipment, construct a domain name resolution to obtain a third data gateway IP address information, and perform access;

Step 809: determining whether the access is successful, if yes, go to step 811, if not, go to step 810;

Step 810: After clearing the switch identifier in the create call request, send a create session request message to the selected target data gateway according to the initial request; to ensure that the user equipment successfully accesses the 3GPP.

Step 811: Successfully access 3GPP.

Referring to FIG. 9, the figure shows that the data gateway identification information only includes an IP address, and the selection access process at this time includes:

Step 901: Receive a handover request Handover from a user equipment by a non-3GPP access 3GPP;

Step 902: Obtain, from the home subscription user server, the data gateway identification information PGW ID allocated for the user equipment.

Step 903: Determine that the data gateway identifier information only includes an IP address.

Step 904: When the IP address information included in the data gateway identifier information is obtained, the second data gateway IP address information is used as the second data gateway IP address information, and the access is performed according to the second data gateway IP address information.

Step 905: Determine whether the access is successful, if yes, go to step 909, if not, go to step 906;

Step 906: Obtain an access point name of the user equipment, construct a domain name resolution to obtain a third data gateway IP address information, and perform access;

Step 907: determining whether the access is successful, if yes, go to step 909, if not, go to step 908;

Step 908: After clearing the handover identifier in the create callback request, send a create session request message to the selected target data gateway according to the initial request; to ensure that the user equipment successfully accesses the 3GPP.

Step 909: Successfully access 3GPP.

Referring to FIG. 10, the figure shows that the data gateway identification information only includes the full name domain name (FQDN). The selection access process at this time includes:

Step 1001: Receive a handover request Handover from a user equipment by a non-3GPP access 3GPP;

Step 1002: Obtain, from the home subscription user server, the data gateway identification information PGW ID allocated for the user equipment.

Step 1003: Determine that the data gateway identifier information only includes the full name domain name information;

Step 1004: Perform domain name resolution according to the full name domain name information to obtain the first data gateway IP address information for access;

Step 1005: Determine whether the access is successful, if yes, go to step 1009, if not, go to step 1006;

Step 1006: Obtain an access point name of the user equipment, construct a domain name resolution to obtain a third data gateway IP address information, and perform access;

Step 1007: Determine whether the access is successful, if yes, go to step 1009, if not, go to step 1008;

Step 1008: After clearing the switch identifier in the create call request, send a create session request message to the selected target data gateway according to the initial request; to ensure that the user equipment successfully accesses the 3GPP.

Step 1009: Successfully access 3GPP.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in a storage medium (ROM/RAM, diskette, optical disk) by a computing device, and in some cases The steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module. Therefore, the invention is not limited to any particular combination of hardware and software.

The modules such as the receiving module, the information acquiring module, and the first address obtaining module may include hardware components, software modules, or a combination of hardware and software. The same unit may be implemented by the same hardware/software or by a combination of different hardware/software. The above modules may all be located in the same hardware structure, such as the same processor; or Blocks or units are located in multiple hardware structures and can interact through a communication connection.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Industrial applicability

The present invention is applicable to the field of communication. When the data gateway identification information includes the full name domain name information, the full name domain name information is preferably used for parsing to obtain the first data gateway IP address information, so as to improve the success rate of non-3GPP to 3GPP access.

Claims

A data gateway selection method includes:

Receiving a handover request from a user equipment by a non-3GPP access 3GPP;

Obtaining data gateway identification information allocated for the user equipment;

When the data gateway identification information includes the full name domain name information, the domain name resolution is performed according to the full name domain name information to obtain the first data gateway IP address information.
The data gateway selection method according to claim 1, wherein when the data gateway identification information does not include the full name domain name information and includes the IP address information, the IP address information is acquired as the second data gateway IP address information.
The data gateway selection method of claim 1, wherein after obtaining the first data gateway IP address information, the method further comprises:

And accessing the 3GPP according to the first data gateway IP address information, if the access fails, and acquiring the IP address information as the second data gateway IP address information when the data gateway identifier information includes the IP address information.
The data gateway selection method according to claim 2 or 3, wherein after obtaining the second data gateway IP address information, the method further includes:

Accessing 3GPP according to the second data gateway IP address information;

If the access fails, the access point name of the user equipment is obtained, and the domain name is constructed according to the obtained access point name for address resolution to obtain the third data gateway IP address information.
The data gateway selection method according to claim 3, wherein the access to the 3GPP fails according to the first data gateway IP address information, and when the data gateway identification information does not include the IP address information, acquiring the user equipment Access point name;

The third domain gateway IP address information is obtained by constructing a domain name according to the obtained access point name for address resolution.
The data gateway selection method of claim 4, wherein after obtaining the third data gateway IP address information, the method further comprises:

And accessing the 3GPP according to the third data gateway IP address information, and if the access fails, sending a create session request message to the selected target data gateway according to the initial request.
The data gateway selection method of claim 4, wherein obtaining the access point name of the user equipment comprises:

Determining whether the access request includes the access point name, if yes, acquiring the access point name; if not, obtaining the default access point name from the user equipment subscription context.
A data gateway selection device includes:

a receiving module, configured to receive a handover request from a user equipment by a non-3GPP access 3GPP;

An information acquiring module, configured to acquire, after the receiving module receives the switching request, data gateway identification information allocated for the user equipment;

The first address obtaining module is configured to: when the data gateway identification information includes the full name domain name information, Performing domain name resolution according to the full name domain name information to obtain first data gateway IP address information.
The data gateway selection device according to claim 8, further comprising a second address obtaining module, configured to: when the data gateway identification information does not include the full name domain name information, and the IP address information is included, obtain the IP address information as Second data gateway IP address information.
The data gateway selecting apparatus according to claim 8, further comprising a first access module and a third address obtaining module;

The first access module is configured to access 3GPP according to the first data gateway IP address information;

The third address obtaining module is configured to obtain the IP address information as the second data gateway IP address information when the first access module fails to access the IP address information.
The data gateway selecting apparatus according to claim 9 or 10, further comprising a second access module and a fourth address obtaining module;

The second access module is configured to access 3GPP according to the second data gateway IP address information;

The fourth address obtaining module is configured to acquire an access point name of the user equipment when the second access module fails to access, and construct a domain name according to the obtained access point name to perform address resolution to obtain a third data gateway. IP address information.
The data gateway selecting apparatus according to claim 10, further comprising a fifth address obtaining module configured to: when the first access module fails to access, when the data gateway identification information does not include IP address information Obtaining an access point name of the user equipment, constructing a domain name according to the obtained access point name, and performing address resolution to obtain third data gateway IP address information.
The data gateway selecting apparatus according to claim 11, further comprising a third access module and an initial access module;

The third access module is configured to access 3GPP according to the third data gateway IP address information;

The initial access module is configured to send a create session request message to the selected target data gateway according to the initial request when the third access module fails to access.
A mobility management entity comprising the data gateway selection device of any of claims 8-13.