WO2015039278A1

WO2015039278A1 - Public data network establishment method, device and system

Info

Publication number: WO2015039278A1
Application number: PCT/CN2013/083612
Authority: WO
Inventors: 何宁; 彼得麦肯; 魏鑫鹏
Original assignee: 华为技术有限公司
Priority date: 2013-09-17
Filing date: 2013-09-17
Publication date: 2015-03-26
Also published as: CN105009615B; CN105009615A

Abstract

The present invention relates to the technical field of network communications. Provided are a public data network (PDN) establishment method, device and system, solving the problem of waste of system resources in the prior art. The method is applied to the architecture of distributed mobility management (DMM) or a coexisting architecture of the DMM and an evolved packet system (EPS); when there is no interface between a mobility management entity (MME) and each gateway, the method comprises: receiving a service request message from a user equipment (UE) and sending the service request message to the MME, the service request message containing service identity corresponding to the service to be maintained by the UE; receiving from the MME related information for reestablishing a PDN, the related information containing the address of a first gateway; obtaining the address of a second gateway of a base station where the UE is currently located; and establishing a channel from the first gateway to the second gateway. The present invention is applied to PDN reestablishment.

Description

Method, device and system for establishing public data network

The present invention relates to the field of network communication technologies, and in particular, to a method, device and system for establishing a public data network.

Background technique

With the development of communication technologies, the Public Data Network (PDN) has been widely used. The current PDN network has many types of architectures, such as Evolved Packet System (EPS) architecture, distributed mobility management.

(Downware Mobility Management, abbreviated wake up) architecture. In the EPS architecture, including a Packet Data Network Gateway (P_GW), a Serving Gateway (S_GW), a Mobility Management Entity (MME), and an evolved Node (evolved Node) Base s tat, eNB for short, and User Equipment (UE).

The specific EPS architecture is as shown in FIG. 1. When the UE is powered on, the eNB where the UE is located selects the MME to which the UE needs to be attached, and the MME selects the S-GW and the P-GW to which the UE is to attach. After that, the EPS needs to be established, and the default load is from the UE to the eNB, then to the S-GW, and then to the P_GW. In the process of UE UE service, P-GW as the anchor of mobility management will generally remain unchanged. When the UE does not have a service, that is, in the IDLE state, when the mobile occurs, if the UE detects that the current eNB is not in the tracking area.

(Tracking Area, referred to as TA) 歹 'J table, Bay' J will initiate a Tracking Area Update (TAU) process. If the S-GW attached to the UE changes in the TAU process, the bearer resource is established in the new S-GW, and the core network between the S-GW and the P-GW remains unchanged due to the P-GW. The bearer is generally pre-established, so only the bearer connection between the UE and the eNB and then to the S-GW needs to be established.

In the DMM architecture, a Local Gateway (L-GW), a mobility management MME, an evolved base station eNB, and a user equipment UE are included. The specific DMM architecture is generally like As shown in Figure 1, there is a centralized control function of entities such as MME, Policy and Charging Rules Function Unit (PCRF) on the control plane, and L-GW is deployed on the access network. As an anchor of mobility management, an IP address is assigned to the UE, and an EPS bearer is created. In Figure 2, each eNB has an L-GW corresponding to it. When the UE moves, the L-GW corresponding to the eNB and the eNB to which the UE is attached changes. To ensure the continuity of the service, a tunnel between the current gateway and the gateway that previously assigned the IP address to the UE needs to be established. When the moving speed is fast, the L-GW corresponding to the attached eNB and the eNB changes rapidly, so that multiple tunnels between the current gateway and multiple gateways that previously allocated IP addresses to the UE need to be established, which wastes system resources.

Summary of the invention

An embodiment of the present invention provides a method, an apparatus, and a system for establishing a public data network, which can solve the problem of wasting system resources in the prior art by frequently establishing a tunnel between a current gateway and multiple gateways that previously assigned an IP address to the UE. The problem.

In order to achieve the above object, the present invention uses the following technical solutions:

In a first aspect, the present invention provides a method for establishing a public data network, which is applied to a distributed mobility management architecture, or a distributed mobility management and an evolutioned packet system coexistence architecture, where the distributed mobility management architecture or The mobility management entity in the coexistence architecture has no interface with each gateway, and the method includes:

Receiving a service request message sent by the user equipment, and sending the service request message to the mobility management entity; the service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain;

Receiving, by the mobility management entity, a related message for reestablishing a public data network; the related message includes an address of the first gateway; and the address of the first gateway is the mobility management entity, according to the service identity identifier, Evolved packet system bearer context obtained;

Obtaining an address of a second gateway to which the base station where the user equipment is currently located belongs;

Establishing a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

Based on the first aspect, in a first implementation manner of the first aspect, the service The identity identifier is a network interconnection protocol address allocated by the first gateway to the user equipment, or an access point name used to rebuild the public data network, or a bearer identifier used to reconstruct the public data network.

Based on the first aspect, in the second implementation manner of the first aspect, in the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, the middle is further included a gateway, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and the service that needs to be maintained exists between the first gateway and the user equipment.

Based on the second implementation manner, in a third implementation manner of the first aspect, the method further includes:

And deleting a related message of the reconstructed public data network created when the user equipment moves to the base station under the intermediate gateway.

According to the second implementation manner, in a fourth implementation manner of the first aspect, the first gateway is established to the foregoing according to an address of the first gateway and an address of the second gateway. Before the tunnel of the second gateway, includes:

Determining whether the address of the intermediate gateway and the second gateway are the same;

If the address of the intermediate gateway and the second gateway are the same, determining that the tunnel of the first gateway to the second gateway is established;

The establishing the tunnel of the first gateway to the second gateway according to the address of the first gateway and the address of the second gateway, including:

If the address of the intermediate gateway and the second gateway are different, the tunnel of the first gateway to the second gateway is established according to the address of the first gateway and the address of the second gateway.

Based on the first aspect, in a fifth implementation manner of the first aspect, when the method is applied to a coexistence architecture of a distributed mobility management and an evolved packet system, if the user equipment evolves from The architecture of the packet system moves into a distributed mobility management architecture, and the reconstructed public data network connection is initiated at the architecture of the evolved packet system, the first gateway being a packet data network gateway. Based on the first aspect, the first to fifth implementation manners of the first aspect, in a sixth implementation manner of the first aspect, the service request message sent by the user equipment is received, and Before the service request message is sent to the mobility management entity, it includes:

Sending a paging notification to the mobility management entity, so that the mobility management entity sends a paging message to the user equipment, where the paging message carries the service identity identifier.

Based on the sixth implementation manner, in the seventh implementation manner of the first aspect, before the sending the paging notification to the mobility management entity, the method includes:

Paging in the cell where the base station is located, and determining whether the response of the user equipment is received;

The sending the paging notification to the mobility management entity includes:

If the response of the user equipment is not received, a paging notification is sent to the mobility management entity.

In a second aspect, the present invention provides a method for establishing a public data network, which is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed mobility management architecture or The mobility management entity in the coexistence architecture has an interface with each gateway, and the method includes:

Receiving a service request message sent by the base station; the service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of the second gateway to which the base station where the user equipment is currently located;

And querying, according to the service identity identifier, an evolved packet system bearer context, and acquiring an address of the first gateway;

Based on the second aspect, in a first implementation manner of the second aspect, the service identity identifier is a network interconnection protocol address allocated by the first gateway to the user equipment, or is a public data network reconstruction The name of the access point used, or the bearer ID used to rebuild the public data network. Based on the second aspect, in the second implementation manner of the second aspect, in the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, the middle is further included a gateway, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and the service that needs to be maintained exists between the first gateway and the user equipment.

Based on the second implementation manner, in a third implementation manner of the second aspect, the method further includes:

According to the second implementation manner, in a fourth implementation manner of the second aspect, the first gateway is established to the foregoing according to an address of the first gateway and an address of the second gateway. Before the tunnel of the second gateway, includes:

Based on the second aspect, in a fifth implementation manner of the second aspect, when the method is applied to a coexistence architecture of a distributed mobility management and an evolved packet system, if the user equipment evolves from The architecture of the packet system moves into a distributed mobility management architecture, and the reconstructed public data network connection is initiated at the architecture of the evolved packet system, the first gateway being a packet data network gateway.

Based on the second aspect, in a sixth implementation manner of the second aspect, when the method is applied to a coexistence architecture of a distributed mobility management and an evolved packet system, if the user equipment is distributed from a user equipment Mobility management architecture moves into the architecture of an evolving packet system and rebuilds A public data network connection is initiated at the distributed mobility management architecture, and the second gateway is a packet data network gateway.

Based on the second aspect, the first to the fifth implementation manners of the first aspect, in a seventh implementation manner of the first aspect, before receiving the service request message sent by the base station, the method includes:

Sending a paging message to the user equipment, where the paging message carries the service identity identifier.

In a third aspect, the present invention provides a public data network establishing apparatus, which is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed mobility management architecture or The mobility management entity in the coexistence architecture has no interface with each gateway, and the device includes:

a receiving unit, configured to receive a service request message sent by the user equipment;

a sending unit, configured to send the service request message that is received by the receiving unit to a mobility management entity, where the service request message includes a service identity identifier corresponding to a service that the user equipment needs to maintain;

The receiving unit is further configured to receive, by the mobility management entity, a related message for reestablishing a public data network; the related message includes an address of the first gateway; and the address of the first gateway is the mobility management entity Obtaining the obtained packet system bearer context according to the service identity identifier;

An obtaining unit, configured to acquire an address of a second gateway to which the base station where the user equipment is currently located belongs;

And a establishing unit, configured to establish a tunnel of the first gateway to the second gateway according to an address of the first gateway received by the receiving unit and an address of the second gateway acquired by the acquiring unit.

Based on the third aspect, in a first implementation manner of the third aspect, the service identity identifier in the service request message received by the receiving unit is a network interconnection that is allocated by the first gateway to the user equipment. Protocol address, or the name of the access point used to rebuild the public data network Said, or the bearer identifier used to rebuild the public data network.

Based on the third aspect, in the second implementation manner of the third aspect, in the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, the middle is further included a gateway, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and the service that needs to be maintained exists between the first gateway and the user equipment.

Based on the second implementation manner, in the third implementation manner of the third aspect, the device further includes:

And a deleting unit, configured to delete a related message of the reconstructed public data network created when the user equipment moves to the base station under the intermediate gateway.

Based on the second implementation manner, in the fourth implementation manner of the third aspect, the device further includes:

a determining unit, configured to determine whether the address of the intermediate gateway and the second gateway are the same; the determining unit, configured to determine, if the determining unit determines that the address of the intermediate gateway and the second gateway are the same The tunnel of the first gateway to the second gateway is established; the establishing unit is configured to:

If the determining unit determines that the address of the intermediate gateway and the second gateway are different, establishing the first gateway to the second according to the address of the first gateway and the address of the second gateway. The tunnel of the gateway.

Based on the third aspect, the first to fourth implementation manners of the third aspect, in the fifth implementation manner of the third aspect, the sending unit is further configured to:

Based on the fifth implementation manner, in the sixth implementation manner of the third aspect, the device further includes:

a paging unit, configured to perform paging in a cell where the base station is located;

The determining unit is further configured to determine whether a response of the user equipment is received; The sending unit is configured to:

And if the determining unit determines that the response of the user equipment is not received, sending a paging notification to the mobility management entity.

In a fourth aspect, the present invention provides a public data network establishing apparatus, which is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed mobility management architecture or The mobility management entity in the coexistence architecture has an interface with each gateway, and the device includes:

a receiving unit, configured to receive a service request message sent by the base station, where the service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of a second gateway to which the base station where the user equipment is currently located belongs;

An obtaining unit, configured to query an evolved packet system bearer context according to a service identity identifier in a service request message received by the receiving unit, to obtain an address of the first gateway;

And a establishing unit, configured to establish a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

Based on the fourth aspect, in a first implementation manner of the fourth aspect, the service identity identifier in the service request message received by the receiving unit is a network interconnection that is allocated by the first gateway to the user equipment. The protocol address, either the name of the access point used to rebuild the public data network, or the bearer identifier used to rebuild the public data network.

Based on the fourth aspect, in the second implementation manner of the fourth aspect, in the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, the middle is further included a gateway, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and the service that needs to be maintained exists between the first gateway and the user equipment.

Based on the second implementation manner, in the third implementation manner of the fourth aspect, the device further includes:

And a deleting unit, configured to delete a related message of the reconstructed public data network created when the user equipment moves to the base station under the intermediate gateway. Based on the second implementation manner, in the fourth implementation manner of the fourth aspect, the device further includes:

a determining unit, configured to determine whether the address of the intermediate gateway and the second gateway are the same; the determining unit, configured to determine, if the determining unit determines that the address of the intermediate gateway and the second gateway are the same The tunnel of the first gateway to the second gateway is established;

The establishing unit is configured to:

Based on the fourth aspect, the first to the sixth implementation manners of the fourth aspect, in the seventh implementation manner of the fourth aspect, the device further includes:

The paging unit is configured to send a paging message to the user equipment, where the paging message carries the service identity identifier.

In a fifth aspect, the present invention provides a public data network establishing apparatus, which is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed mobility management architecture or The mobility management entity in the coexistence architecture has no interface with each gateway, and the device includes:

a receiver, configured to receive a service request message sent by the user equipment;

a transmitter, configured to send the service request message received by the receiver to a mobility management entity; the service request message includes a service identity identifier corresponding to a service that the user equipment needs to maintain;

The receiver is further configured to receive, by the mobility management entity, a related message for reestablishing a public data network; the related message includes an address of the first gateway; and the address of the first gateway is the mobility management entity Obtaining the obtained packet system bearer context according to the service identity identifier;

The receiver is further configured to acquire an address of a second gateway to which the base station where the user equipment is currently located belongs; And a processor, configured to establish, according to the address of the first gateway and the address of the second gateway, the tunnel of the first gateway to the second gateway.

Based on the fifth aspect, in a first implementation manner of the fifth aspect, a service identity identifier in a service request message received by the receiver is a network interconnection allocated by the first gateway to the user equipment The protocol address, either the name of the access point used to rebuild the public data network, or the bearer identifier used to rebuild the public data network.

Based on the fifth aspect, in the second implementation manner of the fifth aspect, in the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, the middle is further included a gateway, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and the service that needs to be maintained exists between the first gateway and the user equipment.

Based on the second implementation manner, in a third implementation manner of the fifth aspect, the processor is further configured to:

Based on the second implementation manner, in a fourth implementation manner of the fifth aspect, the processor is further configured to:

Determining whether the address of the intermediate gateway and the second gateway are the same; if it is determined that the intermediate gateway is the same as the address of the second gateway, determining that the tunnel of the first gateway to the second gateway is established If the address of the intermediate gateway and the second gateway are different, the tunnel of the first gateway to the second gateway is established according to the address of the first gateway and the address of the second gateway. .

Based on the fifth aspect, the first to fourth implementation manners of the fifth aspect, in the fifth implementation manner of the fifth aspect, the transmitter is further configured to:

Based on the fifth implementation manner, in the sixth implementation manner of the fifth aspect, Transmitter, also used to:

Paging in the cell where the base station is located;

The processor is further configured to determine whether a response of the user equipment is received;

The transmitter is further configured to:

And if the processor determines that the response of the user equipment is not received, sending a paging notification to the mobility management entity.

In a sixth aspect, the present invention provides a public data network establishing apparatus, which is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed mobility management architecture or The mobility management entity in the coexistence architecture has an interface with each gateway, and the device includes:

a receiver, configured to receive a service request message sent by the base station; the service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of a second gateway to which the base station where the user equipment is currently located;

a processor, configured to query an evolved packet system bearer context according to a service identity identifier in a service request message received by the receiver, to obtain an address of the first gateway;

The processor is further configured to establish a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

Based on the sixth aspect, in a first implementation manner of the sixth aspect, the service identity identifier in the service request message received by the receiver is a network interconnection allocated by the first gateway to the user equipment The protocol address, either the name of the access point used to rebuild the public data network, or the bearer identifier used to rebuild the public data network.

Based on the sixth aspect, in the second implementation manner of the sixth aspect, in the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, the middle is further included a gateway, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and the service that needs to be maintained exists between the first gateway and the user equipment.

Based on the second implementation manner, in the third implementation manner of the sixth aspect, The processor is also used to:

Based on the second implementation manner, in a fourth implementation manner of the sixth aspect, the processor is further configured to:

Based on the sixth aspect, the first to sixth implementation manners of the sixth aspect, in the seventh implementation manner of the fourth aspect, the transmitter is further configured to:

According to a seventh aspect, the present invention provides a system for establishing a public data network, including a device for establishing a public data network, a user equipment, a mobility management entity, and each gateway, where the mobility management entity has no interface with each gateway; ,

The device for establishing the public data network is configured to receive a service request message sent by the user equipment, and send the service request message to the mobility management entity, where the service request message includes a service corresponding to the service that the user equipment needs to maintain. Business identity

The mobility management entity is configured to query an evolved packet system bearer context according to the service identity identifier, obtain an address of the first gateway, and send a related message for reestablishing the public data network to the establishing apparatus of the public data network. The related message includes an address of the first gateway;

The device for establishing the public data network is further configured to acquire an address of a second gateway to which the base station where the user equipment is currently located; and establish the first according to an address of the first gateway and an address of the second gateway A gateway to the tunnel of the second gateway. In an eighth aspect, the present invention provides a public data network establishing system, including a public data network establishing device, a user equipment, a mobility management entity, a base station, and gateways, where the mobility management entity has no interface with each gateway. ; among them,

The base station is configured to send a service request message to the establishing device of the public data network; the service request message includes a service identity identifier corresponding to a service that the user equipment needs to maintain, and a base station to which the user equipment is currently located The address of the second gateway;

The device for establishing the public data network is configured to query an evolved packet system bearer context according to the service identity identifier, obtain an address of the first gateway, and according to the address of the first gateway and the address of the second gateway Establishing a tunnel of the first gateway to the second gateway.

The method, device, and system for establishing a public data network provided by the embodiment of the present invention obtain the first gateway address that needs to establish a tunnel, and obtain the base station where the user equipment is currently located, by using the service identity identifier corresponding to the service to be maintained. An address of the second gateway to which the tunnel is established, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that have previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiment of the present invention can avoid establishing too many tunnels between gateways, thereby saving system resources.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural diagram of an evolved packet system in the prior art;

2 is a schematic diagram of a distributed mobility management architecture in the prior art;

FIG. 3 is a flowchart of a method for establishing a public data network according to an embodiment of the present invention; FIG. 4 is a flowchart of a method for establishing a public data network according to another embodiment of the present invention; FIG. Flow chart of the method for establishing a public data network; FIG. 6 is a flowchart of a method for establishing a public data network according to another embodiment of the present invention; FIG. 7 is a schematic structural diagram 1 of a device for establishing a public data network according to an embodiment of the present invention; FIG. 9 is a schematic structural diagram 1 of a device for establishing a public data network according to another embodiment of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a device for establishing a public data network according to another embodiment of the present invention; FIG.

FIG. 11 is a schematic structural diagram of a device for establishing a public data network according to still another embodiment of the present invention; FIG.

FIG. 12 is a schematic structural diagram of a device for establishing a public data network according to another embodiment of the present invention; FIG.

FIG. 13 is a schematic diagram of a system for establishing a public data network according to an embodiment of the present invention; FIG. 14 is a schematic diagram of a system for establishing a public data network according to another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

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

As shown in FIG. 3, the method for establishing a public data network according to an embodiment of the present invention is applied to a distributed mobility management (abbreviated Mobility Management, referred to as wake up) architecture, or a distributed mobility management and evolved packet system (Evolved Packet). In the coexistence architecture of the system, the mobile mobility management entity in the distributed mobility management architecture or the coexistence architecture has no interface with each gateway, and the method includes:

101. Receive a service request message sent by the user equipment, and send the service request message. Send to the mobility management entity.

The service request message includes a service identity identifier corresponding to a service that the user equipment needs to maintain. The service identity identifier (Service ID) is the Internet Protocol (IP) address that the first gateway uses for the user equipment (User Equipment, UE for short), or the public data is reconstructed. The Access Point Name (APN) used by the Public Data Network (PDN), or the bearer identifier used to rebuild the public data network.

102. Receive a related message sent by the mobility management entity to reestablish a public data network. The related message includes an address of the first gateway; the address of the first gateway is that the mobility management entity queries the evolved packet system (Evo ved Packet System, referred to as EPS) bearer according to the service identity identifier. Contextually obtained.

103. Obtain an address of a second gateway to which the base station where the user equipment is currently located belongs.

104. Establish a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

It should be noted that the executor of the embodiment of the present invention may be a device for establishing a public data network, and the device for establishing the public data network may be a base station or a device running in the base station, but Not limited to this.

The method for establishing a public data network provided by the embodiment of the present invention obtains a first gateway address that needs to establish a tunnel, and acquires a second network to which the user equipment is currently located, by using a service identity identifier corresponding to the service to be maintained. An address of the gateway, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain the continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiment of the present invention can avoid establishing too many tunnels between gateways, thereby saving system resources.

As shown in FIG. 4, a method for establishing a public data network according to another embodiment of the present invention is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system. In the storage architecture, the distributed mobility management architecture or the mobility management entity in the coexistence architecture has an interface with each gateway, and the method includes:

201. Receive a service request message sent by a base station.

The service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of the second gateway to which the base station where the user equipment is currently located belongs. Specifically, after the base station where the user equipment is currently located receives the service identity identifier sent by the user equipment, the base station adds the address of the second gateway to be described in the service request message.

202. Query, according to the service identity identifier, an evolved packet system bearer context, and obtain an address of the first gateway.

203. Establish a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

It should be noted that the executor of another embodiment of the present invention may be a device for establishing a public data network, where the device for establishing the public data network may be a mobility management entity or may be operated at the base station. The device in, but not limited to this.

A method for establishing a public data network according to another embodiment of the present invention, obtains a first gateway address that needs to establish a tunnel, and obtains a base station to which the user equipment is currently located, by using a service identity identifier corresponding to the service to be maintained. An address of the second gateway, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that have previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiments of the present invention can avoid establishing tunnels between too many gateways and save system resources.

As shown in FIG. 5, a method for establishing a public data network according to another embodiment of the present invention is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed The mobility management entity or the mobility management entity in the coexistence architecture has no interface with each gateway, and the method includes:

301. A device for establishing a public data network performs paging in a cell where the base station is located, and determines Whether the response of the user equipment is received.

Specifically, when the downlink data arrives at the second gateway, the second gateway learns that the corresponding bearer resource information of the base station corresponding to the downlink data is not sent, but if there is an address of the base station, the second gateway sends a downlink data notification message to the base station.

302. The apparatus for establishing the public data network sends a paging notification to the mobility management entity if the response of the user equipment is not received.

303. The mobility management entity sends a paging message to the user equipment.

The paging message carries a service identity identifier. The service identity identifier is a network interconnection protocol address allocated by the first gateway to the user equipment, or an access point name used to reconstruct the public data network, or a bearer identifier used to reconstruct the public data network.

When the method is applied to a coexistence architecture of DMM and EPS, if the user equipment moves from an architecture of an evolved packet system to a distributed mobility management architecture, and the reconstructed public data network is connected to the evolved packet system The architecture is initiated, and the first gateway is a packet data network gateway.

304. The user equipment sends a service request message to the establishing apparatus of the public data network.

305. The establishing apparatus of the public data network sends the service request message to a mobility management entity.

The service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain.

306. The mobility management entity queries the evolved packet system bearer context according to the service identity identifier, and obtains an address of the first gateway.

307. The mobility management entity sends a related message for reestablishing the public data network to the establishing device of the public data network.

The related message includes an address of the first gateway.

308. The device for establishing the public data network acquires an address of a second gateway to which the base station where the user equipment is currently located belongs.

In the distributed mobility management architecture, or distributed mobility management and evolution of packets In the coexistence architecture of the system, the intermediate gateway is further configured, where the intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, the first gateway and the user There is a service between the devices that needs to be maintained. In the DMM architecture, the first gateway and the second gateway and the intermediate gateway are both local gateways (Loca l Ga teway, L_GW for short).

Therefore, after step 308, there is step 309.

In addition, in order to further optimize the entire system, it is necessary to delete related messages of the reconstructed public data network created when the user equipment moves to the base station under the intermediate gateway.

309. The establishing apparatus of the public data network determines whether the addresses of the intermediate gateway and the second gateway are the same.

If it is determined that the address of the intermediate gateway is the same as the address of the second gateway, step 310 is performed; if it is determined that the addresses of the intermediate gateway and the second gateway are different, the steps are performed.

311.

The device for establishing the public data network determines that the tunnel of the first gateway to the second gateway is established.

The establishment of the tunnel may be established in a Tracking Area Upda te (TAU) process, or may be initiated by the first gateway.

31. The establishing device of the public data network establishes a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

The apparatus for establishing the public data network in the embodiment of the present invention may be a base station or a device running in the base station, but is not limited thereto.

A method for establishing a public data network according to another embodiment of the present invention, obtains a first gateway address that needs to establish a tunnel, and obtains a base station to which the user equipment is currently located, by using a service identity identifier corresponding to the service to be maintained. An address of the second gateway, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain continuity of certain services, the current gateway of the UE and multiple gateways that previously allocated IP addresses to the UE are established. Multiple tunnels between them waste system resources. Therefore, the embodiment of the present invention can avoid establishing too many tunnels between gateways, and save system resources.

As shown in FIG. 6, a method for establishing a public data network according to another embodiment of the present invention is applied to a distributed mobility management architecture, or a distributed mobility management and an evolved packet system coexistence architecture, where the distributed The mobility management entity or the mobility management entity in the coexistence architecture has an interface with each gateway, and the method includes:

401. The establishing device of the public data network sends a paging message to the user equipment, where the paging message carries the service identity identifier.

402. The user equipment sends a service request message to the base station.

The request message carries a service identity identifier corresponding to a service that the user equipment needs to maintain. The service identity is a network interconnection protocol address allocated by the first gateway to the user equipment, or an access point name used for rebuilding the public data network, or a bearer identifier used for rebuilding the public data network.

403. The base station adds, in the service request message, an address of a second gateway to which the base station where the user equipment is currently located belongs.

404. The establishing apparatus of the public data network receives a service request message sent by a base station. 405. The device for establishing the public data network queries the evolved packet system bearer context according to the service identity identifier, and obtains an address of the first gateway.

In the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, further including an intermediate gateway, where the intermediate gateway is when the user equipment moves, at the first gateway The gateway between the first gateway and the user equipment has a service to be maintained. When the method is applied to a distributed mobility management and an evolved packet system coexistence architecture, if the user equipment moves from an evolved packet system architecture to a distributed mobility management architecture, and the public data network connection is reconstructed The architecture of the evolved packet system is initiated, and the first gateway is a packet data network gateway. If the user equipment moves from the distributed mobility management architecture to the architecture of the evolved packet system, and the reconstructed public data network connection is initiated by the distributed mobility management architecture, the second gateway is packet data Network gateway. In the DMM architecture, the first gateway and the second gateway and the intermediate gateway may both be local gateways.

Therefore, after step 405, step 406 is also performed. In addition, in order to further optimize the entire system, it is also necessary to delete the related message of the reconstructed public data network created when the user equipment moves to the base station under the intermediate gateway.

406. The apparatus for establishing the public data network determines whether an address of the intermediate gateway and the second gateway are the same.

If the intermediate gateway is the same as the address of the second gateway, step 407 is performed. If the address of the intermediate gateway and the second gateway are different, step 408 is performed.

407. The establishing apparatus of the public data network determines that the tunnel of the first gateway to the second gateway is established.

The establishment of the tunnel may be established in the tracking area update process that occurred before, or the service corresponding to the first gateway may be initiated.

408. The establishing device of the public data network establishes a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

As shown in FIG. 7, the apparatus for establishing a public data network according to an embodiment of the present invention is applied to a distributed mobility management architecture, or a distributed mobility management and a coexistence architecture of an evolved packet system, the distributed mobility. The management architecture or the mobility management entity in the coexistence architecture has no interface with each gateway, and the device includes: The receiving unit 5 1 is configured to receive a service request message sent by the user equipment.

The sending unit 52 is configured to send the service request message received by the receiving unit 51 to the mobility management entity. The service request message includes a service identity identifier corresponding to a service that the user equipment needs to maintain.

The receiving unit 5 1 is further configured to receive a related message that is sent by the mobility management entity to reconstruct a public data network. The related message includes an address of the first gateway. The address of the first gateway is obtained by the mobility management entity according to the service identity identifier and querying an evolved packet system bearer context.

The obtaining unit 5 3 is configured to obtain an address of the second gateway to which the base station where the user equipment is currently located belongs.

The establishing unit 54 is configured to establish the first gateway to the second gateway according to the address of the first gateway received by the receiving unit 51 and the address of the second gateway acquired by the acquiring unit 53 Tunnel.

Further, the service identity identifier in the service request message received by the receiving unit 51 is the network interconnection protocol address allocated by the first gateway for the user equipment, or the access point name used to reconstruct the public data network. , or the bearer ID used to rebuild the public data network.

In the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, further including an intermediate gateway, where the intermediate gateway is when the user equipment moves, at the first gateway The gateway between the first gateway and the user equipment has a service to be maintained.

Further, as shown in FIG. 8, the device further includes:

The deleting unit 55 is configured to delete a related message of the reconstructed public data network that is created when the user equipment moves to the base station under the intermediate gateway.

The determining unit 56 is configured to determine whether the address of the intermediate gateway and the second gateway are the same.

a determining unit 57, configured to: if the determining unit 56 determines the intermediate gateway and the first If the addresses of the two gateways are the same, it is determined that the tunnel of the first gateway to the second gateway is established.

The establishing unit 54 is specifically configured to: if the determining unit 56 determines that the address of the intermediate gateway and the second gateway are different, according to the address of the first gateway and the address of the second gateway, a tunnel from the first gateway to the second gateway.

The sending unit 52 is further configured to:

Further, as shown in FIG. 8, the device further includes:

The paging unit 58 is configured to perform paging in a cell where the base station is located.

The determining unit 56 is further configured to determine whether a response of the user equipment is received. The sending unit 52 is configured to:

If the determining unit 56 determines that the response of the user equipment is not received, the paging notification is sent to the mobility management entity.

It should be noted that the device for establishing the public data network may be a base station or a device running in the base station, but is not limited thereto.

The device for establishing a public data network provided by the embodiment of the present invention acquires a first gateway address that needs to establish a tunnel, and acquires a second network to which the user equipment is currently located, by using a service identity identifier corresponding to the service to be maintained. An address of the gateway, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain the continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that have previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiment of the present invention can avoid establishing too many tunnels between gateways, thereby saving system resources.

As shown in FIG. 9, a device for establishing a public data network according to another embodiment of the present invention is applied to a distributed mobility management architecture, or a coexistence architecture of a distributed mobility management and an evolved packet system, where the distributed Mobility management architecture or mobility management in the coexistence architecture There is an interface between the body and each gateway, and the device includes:

The receiving unit 61 is configured to receive a service request message sent by the base station. The service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of the second gateway to which the base station where the user equipment is currently located belongs.

The obtaining unit 62 is configured to query the evolved packet system bearer context according to the service identity identifier in the service request message received by the receiving unit 61, and obtain the address of the first gateway.

The establishing unit 63 is configured to establish a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

The service identity identifier in the service request message received by the receiving unit 61 is a network interconnection protocol address allocated by the first gateway for the user equipment, or an access point name used to reconstruct the public data network, or is reconstructed. The bearer ID used by the public data network.

Further, as shown in FIG. 10, the device further includes:

The deleting unit 64 is configured to delete a related message of the reconstructed public data network that is created when the user equipment moves to the base station under the intermediate gateway.

Further, as shown in FIG. 10, the device further includes:

The determining unit 65 is configured to determine whether the address of the intermediate gateway and the second gateway are the same.

The determining unit 66 is configured to determine that the tunnel establishment of the first gateway to the second gateway is complete if the determining unit 65 determines that the intermediate gateway and the second gateway have the same address.

The establishing unit 63 is configured to:

If the determining unit 65 determines that the address of the intermediate gateway and the second gateway are different, the first gateway is established according to the address of the first gateway and the address of the second gateway. a tunnel to the second gateway.

Further, as shown in FIG. 10, the device further includes:

The paging unit 67 is configured to send a paging message to the user equipment, where the paging message carries the service identity identifier.

The apparatus for establishing the public data network may be a mobility management entity or a device operating in the base station, but is not limited thereto.

The device for establishing a public data network according to another embodiment of the present invention acquires a first gateway address that needs to establish a tunnel, and obtains a base station to which the user equipment is currently located, by using a service identity identifier corresponding to the service to be maintained. An address of the second gateway, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that have previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiments of the present invention can avoid establishing tunnels between too many gateways and save system resources.

As shown in FIG. 11 , a device for establishing a public data network according to another embodiment of the present invention is applied to a distributed mobility management architecture, or a coexistence architecture of a distributed mobility management and an evolved packet system, where the distribution The mobility management entity or the mobility management entity in the coexistence architecture has no interface with each gateway, and the device includes:

The receiver 71 is configured to receive a service request message sent by the user equipment.

The transmitter 72 is configured to send the service request message received by the receiver 71 to the mobility management entity. The service request message includes a service identity identifier corresponding to a service that the user equipment needs to maintain.

The receiver 71 is further configured to receive a related message that is sent by the mobility management entity to reconstruct a public data network. The related message includes an address of the first gateway; the address of the first gateway is obtained by the mobility management entity according to the service identity identifier and querying an evolved packet system bearer context.

The receiver 71 is further configured to acquire, by the base station where the user equipment is currently located, The address of the second gateway.

The processor 73 is configured to establish a tunnel of the first gateway to the second gateway according to the address of the first gateway and the address of the second gateway received by the receiver 71.

The service identity identifier in the service request message received by the receiver 71 is the network interconnection protocol address allocated by the first gateway for the user equipment, or the access point name used to reconstruct the public data network, or is reconstructed. The bearer ID used by the public data network.

Further, the processor 73 is further configured to:

The processor 73 is further configured to:

Determining whether the address of the intermediate gateway and the second gateway are the same. If it is determined that the address of the intermediate gateway and the second gateway are the same, it is determined that the tunnel of the first gateway to the second gateway is established. If it is determined that the address of the intermediate gateway and the second gateway are different, the tunnel of the first gateway to the second gateway is established according to the address of the first gateway and the address of the second gateway.

The transmitter 72 is further configured to:

Paging in the cell where the base station is located.

The processor 73 is further configured to determine whether a response of the user equipment is received.

The transmitter 72 is further configured to:

If the processor 73 determines that the response of the user equipment is not received, moving to the The dynamic management entity sends a paging notification.

As shown in FIG. 12, a device for establishing a public data network according to another embodiment of the present invention is applied to a distributed mobility management architecture, or a coexistence architecture of a distributed mobility management and an evolved packet system, where the distribution The mobility management entity or the mobility management entity in the coexistence architecture has an interface with each gateway, and the device includes:

The receiver 81 is configured to receive a service request message sent by the base station.

The service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of the second gateway to which the base station where the user equipment is currently located belongs;

The processor 82 is configured to query an evolved packet system bearer context according to the service identity identifier in the service request message received by the receiver 81, and obtain an address of the first gateway.

The processor 82 is further configured to establish a tunnel of the first gateway to the second gateway according to an address of the first gateway and an address of the second gateway.

The service identity identifier in the service request message received by the receiver 81 is a network interconnection protocol address allocated by the first gateway for the user equipment, or an access point name used to reconstruct the public data network, or is reconstructed. The bearer ID used by the public data network.

In the distributed mobility management architecture, or the coexistence architecture of the distributed mobility management and the evolved packet system, further including an intermediate gateway, where the intermediate gateway is when the user equipment moves, at the first gateway The gateway between the first gateway and the user equipment has a service to be maintained. Further, as shown in FIG. 12, the processor 82 is further configured to:

The processor 82 is further configured to:

Further, the transmitter 82 is further configured to:

As shown in FIG. 13 , the public data network establishing system provided by the embodiment of the present invention includes a public data network establishing device 91, a user equipment 92, a mobility management entity 93, and gateways, and the mobility management entity 93 and There is no interface between the gateways;

The public data network establishing device 91 is configured to receive a service request message sent by the user equipment 92, and send the service request message to the mobility management entity 93. The service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain.

The mobility management entity 93 is configured to query an evolved according to the service identity identifier. The packet system bears the context, obtains the address of the first gateway, and sends a related message for reestablishing the public data network to the establishing device 91 of the public data network, where the related message includes the address of the first gateway.

The public data network establishing device 91 is further configured to acquire an address of a second gateway to which the base station where the user equipment 92 is currently located, and establish an office according to the address of the first gateway and the address of the second gateway. a tunnel from the first gateway to the second gateway.

The system for establishing a public data network provided by the embodiment of the present invention obtains the first gateway address of the tunnel that needs to be established through the service identity identifier of the service that needs to be maintained, and obtains the second node to which the base station where the user equipment is currently located belongs. An address of the gateway, thereby establishing a tunnel of the first gateway to the second gateway, and avoiding establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain the continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that have previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiment of the present invention can avoid establishing too many tunnels between gateways, thereby saving system resources.

As shown in FIG. 14, a system for establishing a public data network according to another embodiment of the present invention includes a public data network establishing device 122, a user equipment, a mobility management entity, a base station 121, and respective gateways, and the mobility management entity. There is no interface with each gateway;

The base station 121 is configured to send a service request message to the establishing apparatus 122 of the public data network. The service request message includes a service identity identifier corresponding to the service that the user equipment needs to maintain, and an address of the second gateway to which the base station where the user equipment is currently located belongs.

The public data network establishing means 122 is configured to query an evolved packet system bearer context according to the service identity identifier, obtain an address of the first gateway, and according to the address of the first gateway and the second gateway An address, establishing a tunnel of the first gateway to the second gateway.

An apparatus for establishing a public data network according to another embodiment of the present invention obtains a first gateway address that needs to establish a tunnel, and obtains a base station to which the user equipment is currently located, by using a service identity identifier corresponding to the service to be maintained. The address of the second gateway, thereby establishing the first Gateway to the tunnel of the second gateway, and avoid establishing a tunnel between the gateway other than the first gateway and the second gateway. In the prior art, regardless of whether the UE needs to maintain the continuity of certain services, multiple tunnels between the current gateway of the UE and multiple gateways that have previously assigned IP addresses to the UE are established, which wastes system resources. Therefore, the embodiment of the present invention can avoid establishing too many tunnels between gateways, and save system resources.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. . Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

claims

1. A method for establishing a public data network, applied to a distributed mobility management architecture, or a coexistence architecture of distributed mobility management and evolved packet systems, characterized in that the distribution interface is provided, and the method includes :

Receive a service request message sent by the user equipment, and send the service request message to the mobility management entity; The service request message includes a service identity corresponding to the service that the user equipment needs to maintain;

Receive a related message sent by the mobility management entity for reestablishing the public data network; the related message includes the address of the first gateway; the address of the first gateway is the mobility management entity query based on the service identity identifier. Evolved packet system bearer context obtained;

Obtain the address of the second gateway to which the base station where the user equipment is currently located belongs;

According to the address of the first gateway and the address of the second gateway, a tunnel from the first gateway to the second gateway is established.

2. The method according to claim 1, characterized in that, the service identity identifier is a network interconnection protocol address allocated by the first gateway to the user equipment, or an access point used to rebuild a public data network. Name, or bearer identification used to rebuild the public data network.

3. The method according to claim 1, characterized in that, in the distributed mobility management architecture, or the coexistence architecture of distributed mobility management and evolved packet systems, an intermediate gateway is further included, and the intermediate gateway It is the gateway between the first gateway and the second gateway when the user equipment moves, and there is a service that needs to be maintained between the first gateway and the user equipment.

4. The method according to claim 3, characterized in that, the method further includes: deleting the relevant message for reestablishing the public data network created when the user equipment moves to the base station under the intermediate gateway.

5. The method according to claim 3, characterized in that, after establishing a tunnel from the first gateway to the second gateway according to the address of the first gateway and the address of the second gateway. Previously, included:

Determine whether the addresses of the intermediate gateway and the second gateway are the same;

If the addresses of the intermediate gateway and the second gateway are the same, it is determined that the tunnel from the first gateway to the second gateway is established;

Establishing a tunnel from the first gateway to the second gateway based on the address of the first gateway and the address of the second gateway includes:

If the addresses of the intermediate gateway and the second gateway are different, a tunnel from the first gateway to the second gateway is established based on the address of the first gateway and the address of the second gateway.

6. The method according to claim 1, wherein when the method is applied in a coexistence architecture of distributed mobility management and an evolved packet system, if the user equipment moves from the architecture of the evolved packet system into the distributed mobility management architecture, and reestablishing the public data network connection is initiated in the architecture of the evolved packet system, and the first gateway is a packet data network gateway.

7. The method according to any one of claims 1 to 6, characterized in that, before receiving the service request message sent by the user equipment and sending the service request message to the mobility management entity, it includes:

Send a paging notification to the mobility management entity, so that the mobility management entity sends a paging message to the user equipment, where the paging message carries the service identity identifier.

8. The method according to claim 7, characterized in that, before sending the paging notification to the mobility management entity, the method includes:

Perform paging in the cell where the base station is located, and determine whether a response from the user equipment is received;

The sending of paging notification to the mobility management entity includes:

If no response is received from the user equipment, a paging notification is sent to the mobility management entity.

9. A method for establishing a public data network, applied to a distributed mobility management architecture, or a coexistence architecture of distributed mobility management and evolved packet systems, characterized in that: interface, the methods include:

Receive a service request message sent by the base station; the service request message includes the service identity corresponding to the service that the user equipment needs to maintain and the address of the second gateway to which the base station where the user equipment is currently located belongs;

According to the service identity identifier, query the evolved packet system bearer context and obtain the address of the first gateway;

10. The method according to claim 9, characterized in that, the service identity identifier is a network interconnection protocol address allocated by the first gateway to the user equipment, or an access point used to rebuild a public data network. Name, or bearer identification used to rebuild the public data network.

11. The method according to claim 9, characterized in that, in the distributed mobility management architecture, or the coexistence architecture of distributed mobility management and evolved packet systems, an intermediate gateway is further included, and the intermediate gateway It is the gateway between the first gateway and the second gateway when the user equipment moves, and there is a service that needs to be maintained between the first gateway and the user equipment.

12. The method according to claim 11, characterized in that the method further includes: deleting the relevant message for reestablishing the public data network created when the user equipment moves to the base station under the intermediate gateway.

13. The method according to claim 11, characterized in that, before establishing a tunnel from the first gateway to the second gateway according to the address of the first gateway and the address of the second gateway, include:

Establishing a tunnel from the first gateway to the second gateway based on the address of the first gateway and the address of the second gateway includes: If the addresses of the intermediate gateway and the second gateway are different, a tunnel from the first gateway to the second gateway is established based on the address of the first gateway and the address of the second gateway.

14. The method of claim 9, wherein when the method is applied in a coexistence architecture of distributed mobility management and an evolved packet system, if the user equipment moves from the architecture of the evolved packet system into the distributed mobility management architecture, and reestablishing the public data network connection is initiated in the architecture of the evolved packet system, and the first gateway is a packet data network gateway.

15. The method of claim 9, wherein when the method is applied in a coexistence architecture of distributed mobility management and an evolved packet system, if the user equipment is configured from a distributed mobility management architecture Moving into the architecture of the evolved packet system, and reestablishing the public data network connection is initiated in the distributed mobility management architecture, the second gateway is a packet data network gateway.

16. The method according to any one of claims 9-15, characterized in that, before receiving the service request message sent by the base station, it includes:

Send a paging message to the user equipment, where the paging message carries the service identity identifier.

17. A device for establishing a public data network, applied to a distributed mobility management architecture, or a coexistence architecture of distributed mobility management and an evolved packet system, characterized in that the distributed mobility management architecture or There is no interface between the mobility management entity in the coexistence architecture and each gateway. The device includes:

The receiving unit is used to receive the service request message sent by the user equipment;

A sending unit, configured to send the service request message received by the receiving unit to the mobility management entity; the service request message includes a service identity corresponding to the service that the user equipment needs to maintain;

The receiving unit is also configured to receive a related message for reestablishing the public data network sent by the mobility management entity; the related message includes the address of the first gateway; the address of the first gateway is the mobility management entity According to the service identity identifier, it is obtained by querying the evolved packet system bearer context;

An obtaining unit, configured to obtain the address of the second gateway to which the base station where the user equipment is currently located belongs; An establishing unit, configured to establish a tunnel from the first gateway to the second gateway based on the address of the first gateway received by the receiving unit and the address of the second gateway obtained by the obtaining unit.

18. The apparatus according to claim 17, wherein the service identity identifier in the service request message received by the receiving unit is the network interconnection protocol address assigned by the first gateway to the user equipment, or It is the access point name used to rebuild the public data network, or the bearer identifier used to rebuild the public data network.

19. The apparatus according to claim 17, characterized in that, in the distributed mobility management architecture, or the coexistence architecture of distributed mobility management and evolved packet systems, an intermediate gateway is further included, The intermediate gateway is a gateway between the first gateway and the second gateway when the user equipment moves, and there is a service that needs to be maintained between the first gateway and the user equipment.

20. The device according to claim 19, characterized in that, the device further includes: a deletion unit, configured to delete the reconstructed public data network created when the user equipment moves to the base station under the intermediate gateway. related news.

21. The device according to claim 19, characterized in that, the device further includes: a judging unit, used to judge whether the addresses of the intermediate gateway and the second gateway are the same; a determining unit, used if The determination unit determines that the addresses of the intermediate gateway and the second gateway are the same, and then determines that the tunnel from the first gateway to the second gateway has been established;

The establishment unit is used for:

If the determination unit determines that the addresses of the intermediate gateway and the second gateway are different, establish the first gateway to the second gateway based on the address of the first gateway and the address of the second gateway. Gateway tunnel.

22. The device according to any one of claims 1 to 21, characterized in that the sending unit is also used for:

23. The device according to claim 22, characterized in that, the device further includes: a paging unit, used to perform paging in the cell where the base station is located;

The judging unit is also used to judge whether a response from the user equipment is received; the sending unit is used to:

If the determining unit determines that no response from the user equipment is received, a paging notification is sent to the mobility management entity.

24. A device for establishing a public data network, applied to a distributed mobility management architecture, or a coexistence architecture of distributed mobility management and an evolved packet system, characterized in that the distributed mobility management architecture or the There is an interface between the mobility management entity in the coexistence architecture and each gateway, and the device includes:

A receiving unit, configured to receive a service request message sent by the base station; the service request message includes a service identity corresponding to the service that the user equipment needs to maintain and the address of the second gateway to which the base station where the user equipment is currently located belongs;

An acquisition unit, configured to query the evolved packet system bearer context according to the service identity identifier in the service request message received by the receiving unit, and obtain the address of the first gateway;

An establishing unit, configured to establish a tunnel from the first gateway to the second gateway according to the address of the first gateway and the address of the second gateway.

25. The apparatus according to claim 24, wherein the service identity identifier in the service request message received by the receiving unit is the network interconnection protocol address allocated by the first gateway to the user equipment, or is a reconstruction The name of the access point used by the public data network, or the bearer identifier used to rebuild the public data network.

26. The apparatus according to claim 24, characterized in that, in the distributed mobility management architecture, or the coexistence architecture of distributed mobility management and evolved packet systems, an intermediate gateway is further included, and the intermediate gateway It is the gateway between the first gateway and the second gateway when the user equipment moves, and there is a service that needs to be maintained between the first gateway and the user equipment.

27. The device according to claim 26, characterized in that, the device further includes: A deletion unit, configured to delete related messages about reestablishing the public data network created when the user equipment moves to the base station under the intermediate gateway.

28. The device according to claim 26, characterized in that, the device further includes: a judging unit, used to judge whether the addresses of the intermediate gateway and the second gateway are the same; a determining unit, used to determine if the addresses of the intermediate gateway and the second gateway are the same; If the judgment unit determines that the addresses of the intermediate gateway and the second gateway are the same, it is determined that the tunnel from the first gateway to the second gateway has been established;

The establishment unit is used for:

29. The device according to any one of claims 24 to 28, characterized in that, the device further includes:

A paging unit, configured to send a paging message to the user equipment, where the paging message carries the service identity identifier.