WO2010102571A1

WO2010102571A1 - Method and device for redirecting s101 tunnel

Info

Publication number: WO2010102571A1
Application number: PCT/CN2010/070983
Authority: WO
Inventors: 王珊珊; 吴问付
Original assignee: 华为技术有限公司
Priority date: 2009-03-11
Filing date: 2010-03-11
Publication date: 2010-09-16
Also published as: CN101835134A; CN101835134B

Abstract

A method for redirecting an S101 tunnel and device thereof are disclosed in the embodiments of the present invention. In the way that a target mobility management entity of the first network obtains the identification information of a target access network of a second network provided by a target base station of a first network and establishes the S101 tunnel with the second network according to the identification information, because the identification information of the target access network of the second network is provided by the target base station of the first network, it is ensured to enable the routing of the target mobility management entity of the first network to the target access network of the second network, thereby the invalidation of the redirected S101 tunnel is avoided.

Description

S101 tunnel redirection method and device

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for S101 tunnel redirection.

BACKGROUND OF THE INVENTION In order to optimize user equipment (UE) from Long Term Evolution/System Architecture Evolution (LTE/SAE, Long Term Evolved/System Architecture Evolution) network to High Rate Packet Data of Code-Division Multiple Access (CDMA) 2000 (HRPD, High Rate Packet Data) The network switching process, 3GPP, The 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project) divides the handover process into two processes: a pre-registration process and a handover execution process. In this document, the LTE/SAE network is referred to as the first network, and the CDMA2000 network is referred to as the second network. The pre-registration process occurs before the actual handover process, and is the access network in which the UE still resides in the LTE/SAE network. That is, when the Evolved Universal Mobile Telecommunication System Radio Access Network (E-UTRAN) is used, the process of registering with the HRPD is performed. The pre-registration process establishes a connection between the mobility management entity (MME, Mobility Management Entity) of the first network and the HRPD access network (AN, Access Network) of the second network, which is called an S101 tunnel.

After the UE performs the pre-registration process of the HRPD, it moves from the control area of one base station (eNodeB) of the first network (that is, the so-called source base station) to the control area of another base station (that is, the so-called target base station). When the mobility management entity of the first network corresponding to the UE changes, the UE initiates a base station handover process or a tracking area update (TAU) process, and triggers the S101 tunnel redirection process.

In the research and practice of the prior art, the inventors of the present invention found that the following problems exist: In the S101 tunnel redirection process, the target mobility management entity of the first network (corresponding to the target base station of the first network) is Correlating the S101 tunnel with the source access network of the second network according to the identifier of the source access network of the second network corresponding to the source mobility management entity of the first network (corresponding to the source base station of the first network), that is, Redirecting the S101 tunnel to the source access network of the second network corresponding to the source mobility management entity of the first network, and the target mobility management entity of the first network and the source access network of the second network are not necessarily reachable Therefore, the presence of the redirected S101 tunnel may be invalid and the pre-registration of the user equipment is invalid. Summary of the invention The technical problem to be solved by the embodiments of the present invention is to provide a method and related apparatus for avoiding S101 tunnel redirection in which the S101 tunnel is invalid.

To solve the above technical problem, the embodiment provided by the present invention is implemented by the following technical solutions: A method for redirection of an S101 tunnel, comprising: switching, at a user equipment, a source base station of a first network to a target base station of a first network In the process, after the user equipment is switched by the source base station of the first network to the target base station of the first network, the target mobility management entity of the first network corresponding to the target base station of the first network obtains from the target base station of the first network. The identification information of the target access network of the second network; the second network is a network pre-registered by the user equipment; the target mobility management entity of the first network according to the identification information of the target access network of the second network, and the second network The target access network establishes the S101 tunnel of the user equipment.

A mobility management entity, comprising: an acquisition target identification unit, configured to switch in a process in which a user equipment is switched by a source base station of a first network to a target base station of a first network, or in a user equipment that is switched by a source base station of a first network After obtaining the target base station of the first network, acquiring the identification information of the target access network of the second network from the target base station of the first network; the second network is a network pre-registered with the user equipment; establishing a tunnel unit, according to the acquisition target The identifier information of the target access network of the second network acquired by the identifier unit is established, and the S101 tunnel of the user equipment is established with the target access network of the second network.

A base station, comprising: a target identification unit, configured to generate identifier information of a target access network of the second network; the second network is a network pre-registered by user equipment residing in the first network to which the user belongs; An identifier unit, configured to: when the user equipment is switched by the source base station of the first network to the user equipment, or after the user equipment is switched by the source base station of the first network to itself, to the mobility management entity of the first network corresponding to the user equipment And transmitting, by the generating target identifier unit, identification information of a target access network of the second network.

As can be seen from the foregoing technical solution, the embodiment of the present invention uses the target mobility management entity of the first network to obtain the identification information of the target access network of the second network provided by the target base station of the first network, and establishes accordingly In the mode of the S101 tunnel, the identifier information of the target access network of the second network is provided by the target base station of the first network, so that the target mobility management entity of the first network and the target access network of the second network are reachable. This prevents the redirected S101 tunnel from being invalidated. . BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only the present invention. Some of the embodiments can be obtained by those skilled in the art from the drawings without any creative work.

1 is a system architecture diagram of user equipment pre-registering from E-UTRAN to HRPD;

2 is a schematic flow chart of a method according to Embodiment 1 of the present invention;

3 is a schematic diagram of a network in which a base station handover or a tracking area update occurs after user equipment pre-registration; FIG. 4 is a schematic flowchart of a method according to Embodiment 2 of the present invention;

5 is a schematic flow chart of a method according to Embodiment 3 of the present invention;

6 is a schematic flow chart of a method according to Embodiment 4 of the present invention;

7 is a schematic flow chart of a method according to Embodiment 5 of the present invention;

8 is a schematic flow chart of a method according to Embodiment 6 of the present invention;

9 is a schematic flow chart of a method according to Embodiment 7 of the present invention;

10 is a schematic structural diagram of a mobility management entity according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying 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. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

The system architecture diagram of the user equipment (UE) residing in the access network E-UTRAN of the first network (LTE/SAE) to the HRPD access network (HRPD AN) of the second network (CDMA2000) may be as shown in the figure. 1 shown, where

E-UTRAN is a radio access network of an LTE/SAE network, which is responsible for accessing user equipment to an LTE/SAE network, and the E-UTRAN includes an eNodeB device;

The MME is responsible for the mobility management of the control plane, including user context and mobility state management, assigning user temporary identity, security functions, and the like;

HRPD AN is the access network of CDMA2000, which is responsible for accessing user equipment to the CDMA2000 network through HRPD access technology;

The S101 tunnel is a data channel between the MME and the HRPD AN, and is used for pre-registration of the HRPD when the UE camps on the E-UTRAN.

The following are specific embodiments of the invention.

Embodiment 1 A method for redirecting an S101 tunnel, see FIG. 2, includes the following steps: Step 101: After the user equipment is switched by the source base station of the first network to the target base station of the first network, or after the user equipment is switched by the source base station of the first network to the target base station of the first network, the first network The target mobility management entity of the first network corresponding to the target base station acquires the identity information of the target access network of the second network from the target base station of the first network; the second network is a network pre-registered by the user equipment.

After the user equipment is pre-registered with the source access network of the second network, if the location moves, the base station of the first network corresponding to the user equipment changes, and the mobility management entity of the first network corresponding to the user equipment may also A change has occurred. Depending on the state in which the user equipment is moving in position, the user equipment may have a tracking area update or base station handover in the first network. In this process, the S101 tunnel redirection process is triggered. Alternatively, after the base station handover process in the first network is completed,

The S101 tunnel redirection process is triggered.

Specifically, if the user equipment is in an idle state in the first network when the location moves, that is, there is no signaling connection with the network side, the user equipment performs tracking area update, including sending a tracking area update request to the target base station of the first network. The target base station of the first network sends the tracking area update request to the target mobility management entity of the first network corresponding to the first network; if the user equipment is in the active state (connected state) in the first network when the location moves, that is, the network There is a signaling connection on the side, and the user equipment performs the handover of the base station, including sending a handover confirmation message to the target base station of the first network, and the target base station of the first network sends the handover confirmation message to the target mobility management of the first network corresponding thereto. entity.

The tracking area update request or the handover confirmation message sent by the target base station of the first network may carry the identification information of the target access network of the second network that is generated according to the pre-configuration, or may not be carried, and does not affect the embodiment of the present invention. Implementation.

When the received mobility message carries the identification information of the target access network of the second network, the target mobility management entity of the first network may directly find the address of the target access network of the second network according to the identifier; When the information of the target access network of the second network is not carried in the message, the target mobility management entity of the first network may send an inquiry message to the target base station of the first network, and obtain the identifier of the target access network of the second network. information.

The identification information of the access network involved in the embodiment of the present invention may be a sector identifier, an identifier of the access network element, or other identifier information of the access network.

Step 102: The target mobility management entity of the first network establishes an S101 tunnel of the user equipment with the target access network of the second network according to the identifier information of the target access network of the second network.

Referring to FIG. 3, FIG. 3 is a schematic diagram of a network structure of a base station handover or a tracking area update in a first network after a user equipment pre-registers with a source access network of a second network. As can be seen from the figure, in use After the user equipment switches to the target base station of the first network, the target mobility management entity of the first network to which the target base station of the first network belongs acquires the identification information of the target access network of the second network from the target base station of the first network, ^ A redirected S101 tunnel is established based on the identity with the target access network of the second network.

If the two base stations in which the first network is handed over correspond to the same mobility management entity, the target mobility management entity and the source mobility management entity are the same device, and the implementation of the embodiment of the present invention is not affected.

The embodiment uses the target mobility management entity of the first network to obtain the identifier information of the target access network of the second network provided by the target base station of the first network, and establishes the S101 tunnel manner accordingly, because the second network The identification information of the target access network is provided by the target base station of the first network, which ensures that the target mobility management entity of the first network and the target access network of the second network are reachable, thereby preventing the redirected S101 tunnel from being invalid. . Embodiment 2: A handover method is a handover method performed according to the method of S101 tunnel redirection described in Embodiment 1, and FIG. 4 includes the following steps:

Step 11: After the user equipment is switched by the source base station of the first network to the target base station of the first network, or after the user equipment is switched by the source base station of the first network to the target base station of the first network, the first network The target mobility management entity of the first network corresponding to the target base station acquires the identification information of the target access network of the second network from the target base station of the first network, and the target of the target mobility management entity of the first network from the first network The source mobility management entity of the first network corresponding to the base station or the source base station of the first network acquires the identifier of the source access network of the second network allocated to the user equipment; the source equipment of the user equipment in the second network has been performed. Pre-registration.

In this step, the process of acquiring the identifier information of the target access network of the second network by the target base station of the first network may be performed by referring to step 101 in the first embodiment. In addition, in order to perform the handover of the source access network to the target access network in the second network, the target base station of the first network also needs to obtain the identifier allocated by the source access network of the second network to the user equipment.

Step 12: The target mobility management entity of the first network establishes an S101 tunnel of the user equipment with the target access network of the second network according to the identifier information of the target access network of the second network, and connects the source of the second network. The identifier assigned to the user equipment by the network is sent to the target access network of the second network.

Step 13: The target access network of the second network switches to the source access network of the second network according to the identifier allocated to the user equipment by the source access network of the second network.

After obtaining the identifier of the user equipment from the target mobility management entity of the first network, the target access network of the second network may perform handover with the source access network of the second network, including performing context exchange, etc., to obtain Session information of the user equipment, thereby ensuring pre-registration of the user equipment in the second network Effective.

On the basis of the first embodiment, after the S101 tunnel is redirected, the switching from the source access network to the target access network is performed in the second network to ensure that the user equipment moves in the first network. , Pre-registration in the second network remains valid. The following embodiments 3 and 4 respectively describe that a message sent by a target base station (eNodeB) of the first network (LTE/SAE) carries or does not carry in a process in which the user equipment (UE) is in an idle state tracking area update (TAU). The switching process of the identification of the target access network (HRPD AN) of the second network (CDMA2000). Embodiments 5 and 6 respectively describe a handover processing procedure in which the message sent by the target eNodeB of the first network carries or does not carry the identifier of the target HRPD AN of the second network in the process of the eNodeB switching in the active state. Embodiment 7 describes a process of performing redirection of the S101 tunnel and handover in the second network after the UE pre-registers with the source HRPD AN of the second network and completes the eNodeB handover in the first network. For the sake of brevity, in the following embodiments, the eNodeB-1 is used to indicate the source base station of the first network, and the MME-1 is the mobility management entity (ie, the source mobility management entity) of the first network corresponding to the eNodeB-1, HRPD AN. -1 indicates a source access network of the second network, eNodeB-2 indicates a target base station of the first network, and MME-2 indicates a mobility management entity (ie, a target mobility management entity) of the first network corresponding to the eNodeB-2, HRPD AN-2 represents the target access network of the second network. Embodiment 3 Referring to FIG. 5 in detail, FIG. 5 is a schematic flowchart of the method according to the embodiment.

Step 201: After the UE performs the pre-registration process of the second network (CDMA2000) HRPD AN through the first network (LTE/SAE), the S101 tunnel is established between the MME-1 and the HRPD AN-1.

When the UE is in the idle state, the MME-1 starts to switch to the MME-2, and the associated eNodeB also starts to switch from the eNodeB-1 to the eNodeB-2. Since the coverage of the MME is larger than that of the eNodeB, when the MME handover occurs, the eNodeB associated with the UE must also switch.

Step 202: The UE sends a TAU request message to the eNodeB-2.

The message may carry the identifier assigned by the HRPD AN-1 to the UE, that is, the UATI (Unicast Access Terminal Identifier) ₀

Step 203: The eNodeB-2 sends the received TAU request message to the MME-2, and carries the identifier of the HRPD AN-2 in the message.

The identifier of the HRPD AN-2 may be generated by the eNodeB-2 according to the static configuration, and may be the sector identifier of the HRPD AN-2 or the network element identifier of the HRPD AN-2. Of course, the message may also carry the UATL allocated by the HRPD AN-1 to the UE. Step 204: The MME-2 performs context interaction with the MME-1 to obtain the context of the UE.

Generally, the MME-2 may also perform a bearer between an update and a service gateway (S-GW), a packet data network gateway (P-GW, Packet Data Network Gateway), to a home subscriber server (HSS, Home Subscribers). The server initiates a location update request and the like, and the HSS performs a cancel location registration process to the MME-1, and returns a location update response to the MME-2.

In addition, if the TAU request message sent by the UE to the eNodeB-2 in step 202 does not carry the UATI allocated by the HRPD AN-1 to the UE, the MME-2 may also obtain the HRPD in the process of performing context interaction with the MME-1 in this step. The UATI assigned to the UE by AN-1 does not affect the implementation of the embodiment of the present invention.

Step 205: The MME-2 selects the HRPD AN-2 according to the identifier of the received HRPD AN-2 to establish an S101 tunnel connection; and sends the UATI assigned by the HRPD AN-1 to the HRPD AN-2.

Step 206: The HRPD AN-2 performs handover according to the UE's UATI and the HRPD AN-1, and the HRPD AN-2 obtains the UE's tongue information.

The switching process between HRPD AN-2 and HRPD AN-1 can be briefly described as follows:

a, HRPD AN-2 finds HRPD AN-1 according to UATI assigned by HRPD AN-1, sends A13 interface tongue information transmission request to HRPD AN-1, acquires UE's tongue information; and cooperates with target access network gateway (HSGW) -2) establish an Al 1 interface connection;

b. The data transmission tunnel is established between the HSGW-2 and the source target access network gateway (HSGW-1), and the source side service data is sent to the HSGW-2;

c. HSGW-2 notifies HSGW-1 to tear down the data transmission tunnel; HSGW-1 releases the source side resources. When HRPD AN-2 and HRPD AN-1 belong to the same HSGW, steps b and c are not executed. Step 207: HRPD AN-2 replies to MME-2 with an S101 connection complete message.

Step 208: The MME-2 replies to the UE with a TAU completion response.

In this embodiment, when the UE is in the idle state, the target base station of the first network carries the identifier information of the target access network of the second network in the TAU request message sent by the target mobility management entity of the first network, so that the user equipment After the location update occurs in the first network, the redirected S101 tunnel is valid, and further ensures that the pre-registration of the user equipment is valid after the handover from the source access network to the target access network is performed in the second network. Embodiment 4 Referring to FIG. 6 in detail, FIG. 6 is a schematic flowchart of the method of the embodiment.

Step 301: After the UE performs the pre-registration process of the second network (CDMA2000) HRPD AN through the first network (LTE/SAE), the S101 tunnel is established between the MME-1 and the HRPD AN-1.

When the UE is in the idle state, the MME-1 starts to switch to the MME-2, and the associated eNodeB also opens. Start switching from eNodeB-1 to eNodeB-2.

Step 302: The UE sends a TAU request message to the eNodeB-2.

Step 303: The eNodeB-2 sends the received TAU request message to the MME-2.

Step 304: MME-2 performs context interaction with MME-1 to obtain the identifier of HRPD AN-1 and

HRPD AN-1 is assigned to the UATI of the UE.

Referring to steps 202 and 203 of the third embodiment, the MME-2 may also be sent from the UE to the eNodeB-2.

Obtaining the UATI assigned by the HRPD AN-1 to the UE in the TAU request message does not affect the implementation of the embodiment of the present invention.

Step 305: The MME-2 sends an identifier of the HRPD AN-2 to the eNodeB-2, and the eNodeB-2 returns the identifier of the pre-configured HRPD AN-2.

Step 304 and step 305 can be performed simultaneously without affecting the implementation of the embodiments of the present invention.

Steps 306 ~ 309 are similar to steps 205 ~ 208 and will not be described again.

In this embodiment, when the UE is in the idle state, the target mobility management entity of the first network actively queries the target base station of the first network and obtains the identifier information of the target access network of the second network, so that the user equipment is in the first network. After the location update occurs, the redirected S101 tunnel is valid, and further ensures that the pre-registration of the user equipment is valid after the handover from the source access network to the target access network is performed in the second network. Embodiment 5 Referring to FIG. 7 in detail, FIG. 7 is a schematic flowchart of the method in the embodiment.

Step 401: The UE performs the second network (CDMA2000) HRPD through the first network (LTE/SAE).

After the pre-registration process of the AN, the S101 tunnel is established between MME-1 and HRPD AN-1.

When the UE is in the connected state, the eNodeB-1 starts to switch to the eNodeB-2.

Step 402: The UE sends a handover confirmation message to the eNodeB-2, where the message may carry the UATI assigned by the HRPD AN-1 to the UE.

Step 403: The eNodeB-2 sends the received handover confirmation message to the MME-2, and carries the identifier of the HRPD AN-2 in the message. Of course, the message may also carry the HRPD AN-1 assigned to the UE.

UATL

Step 404: The MME-2 performs context interaction with the MME-1 to obtain the context of the UE.

Step 403 and step 404 can be performed simultaneously without affecting the implementation of the embodiments of the present invention.

If the handover acknowledgement message sent by the UE to the eNodeB-2 in step 402 does not carry the UATI allocated by the HRPD AN-1 to the UE, the MME-2 may also acquire the HRPD AN in the process of performing context interaction with the MME-1 in this step. -1 UATI assigned to the UE does not affect the implementation of the embodiment of the present invention.

Steps 405 ~ 408 are similar to steps 205 ~ 208 and are not mentioned again. In this embodiment, when the UE is in the connected state, the target base station of the first network carries the identification information of the target access network of the second network in the handover confirmation message sent by the target mobility management entity of the first network, so that the user equipment After the base station handover occurs in the first network, the redirected S101 tunnel is valid, and further ensures that the pre-registration of the user equipment is valid after the handover from the source access network to the target access network is performed in the second network. Embodiment 6 Referring to FIG. 8 in detail, FIG. 8 is a schematic flowchart of a method according to the embodiment.

Step 501: The UE performs the second network (CDMA2000) HRPD through the first network (LTE/SAE).

Step 502: The UE sends a handover confirmation message to the eNodeB-2.

Step 503: The eNodeB-2 sends the received handover confirmation message to the MME-2.

Step 504: MME-2 performs context interaction with MME-1 to obtain the identifier of HRPD AN-1 and

HRPD AN-1 Assigned to the UE's UATL

Referring to steps 402 and 403 of the fifth embodiment, the MME-2 may also obtain the UATI allocated by the HRPD AN-1 to the UE from the handover confirmation message sent by the UE to the eNodeB-2, without affecting the implementation of the embodiment of the present invention.

Step 505: The MME-2 sends an identifier of the HRPD AN-2 to the eNodeB-2, and the eNodeB-2 returns the identifier of the pre-configured target HRPD AN-2.

Step 504 and step 505 can be performed simultaneously without affecting the implementation of the embodiments of the present invention.

Steps 506 ~ 509 are similar to steps 205 ~ 208, and will not be described again.

In this embodiment, when the UE is in the connected state, the target mobility management entity of the first network actively queries the target base station of the first network and obtains the identifier information of the target access network of the second network, so that the user equipment is in the first network. After the location update occurs, the redirected S101 tunnel is valid, and further ensures that the pre-registration of the user equipment is valid after the handover from the source access network to the target access network is performed in the second network. Embodiment 7 Referring to FIG. 9 in detail, FIG. 9 is a schematic flowchart of the method according to the embodiment.

Step 601: After the UE performs the pre-registration process of the second network (CDMA2000) HRPD AN through the first network (LTE/SAE), the S101 tunnel is established between the MME-1 and the HRPD AN-1.

Step 602: When the UE is in the idle state, a TAU process occurs, that is, the UE is switched from MME-1 to MME-2, and the associated eNodeB is also switched from eNodeB-1 to eNodeB-2.

The UE sends a TAU request message to the eNodeB-2, and the eNodeB-2 sends the received TAU request message to the MME-2, and the MME-2 performs context interaction with the MME-1 to obtain the context of the UE. The UTI allocated by the HRPD AN-1 to the UE is included, and the bearer between the update and the SGW and the PGW is performed, and a location update request is initiated to the HSS. The HSS performs a cancel location registration process to the MME-1, and returns a location to the MME-2. Update response, MME-2 replies to the UE with a TAU completion response.

Step 603: The UE initiates a session establishment process with the HRPD AN-2 through the eNodeB-2 (the process is transparently transmitted by the eNodeB-2 and the MME-2), and the eNodeB-2 sends an uplink tunnel encapsulation message to the MME-2 (for example, the uplink SI CDMA2000) The tunnel encapsulation message carries the identifier of the HRPD AN-2 generated according to the pre-configuration in the message.

Steps 604 ~ 605 are similar to steps 205 ~ 206 and will not be described again.

In this embodiment, after the UE completes the handover process in the first network, in the process of establishing a session between the UE and the target access network of the second network, the target base station of the first network sends the target access network carrying the second network. The uplink tunnel encapsulation message of the identification information is sent to the target mobility management entity of the first network, so that after the location update of the user equipment in the first network, the redirected S101 tunnel is valid, and further ensuring execution of the source in the second network After the switching of the access network to the target access network, the pre-registration of the user equipment is valid.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

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

The foregoing provides a method for redirection of an S101 tunnel. The embodiment of the present invention further provides a mobility management entity and a base station.

A mobility management entity 10, which can be seen in FIG. 10, FIG. 10 is a schematic structural diagram of a mobility management entity according to an embodiment of the present invention, including:

Obtaining the target identifier unit 11 , configured to: when the user equipment is switched by the source base station of the first network to the target base station of the first network, or after the user equipment is switched by the source base station of the first network to the target base station of the first network And acquiring, by the target base station of the first network, identifier information of the target access network of the second network; where the second network is a network pre-registered by the user equipment.

The tunneling unit 12 is configured to establish an S101 tunnel of the user equipment with the target access network of the second network according to the identifier information of the target access network of the second network acquired by the target identifier unit 11.

Obtaining the target identification unit 11 according to the second information carried in the message sent by the target base station of the first network The identification information of the target access network of the network is found to be the target access network of the second network, or may be active when the message sent by the target base station of the first network does not carry the identification information of the target access network of the second network. Querying the target base station of the first network to obtain the identifier information of the target access network of the second network does not affect the implementation of the embodiment of the present invention.

Specifically, the acquiring target identifier unit 11 may be specifically configured to: when the user equipment is switched by the source base station of the first network to the target base station of the first network, or when the user equipment is switched by the source base station of the first network to the first After the target base station of the network, the identification information of the target access network of the second network on the target base station of the first network is acquired. For example, in a process in which the user equipment is switched by the source base station of the first network to the target base station of the first network, the tracking area update request message or the handover confirmation message sent by the target base station of the first network is received, and the tracking area update request is obtained. And the identifier information of the target access network of the second network carried in the message or the handover confirmation message; or, after the user equipment is switched by the source base station of the first network to the target base station of the first network, the target base station that receives the first network sends The uplink tunnel encapsulation message is obtained by acquiring the identifier of the target access network of the second network carried in the uplink tunnel encapsulation message, or the acquisition target identifier unit 11 may also be specifically used, where the user equipment is used by the source base station of the first network. During the process of switching to the target base station of the first network, the target base station of the first network is queried for the identity information of the target access network of the second network, and the target access network of the second network returned by the target base station of the first network is obtained. Identification information. In this case, the acquisition target identification unit 11 may be further configured to: receive a tracking area update request message or a handover confirmation message sent by the target base station of the first network, and determine that the tracking area update message or the handover confirmation message is not carried. When the target information of the target network of the second network is accessed, the target base station of the first network is triggered to query the identifier information of the target access network of the second network.

In addition, the mobility management entity 10 may further include:

The acquiring device identification unit 13 is configured to acquire, from the target base station of the first network or the source mobility management entity of the first network corresponding to the source base station of the first network, identifier information that is allocated to the user equipment by the source access network of the second network;

The tunneling unit 14 is configured to send the identifier information of the source access network of the second network acquired by the acquiring device identifier unit 13 to the user equipment to the second network by using the S101 tunnel of the user equipment established by the tunneling unit 12 Target access network.

The target access network of the second network can be switched according to the identity information allocated to the user equipment by the source access network of the second network, and the source access network of the second network is switched to ensure that the user is in the second network. Pre-registration is valid. A base station 20, which can be seen in FIG. 11, FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention, including:

a target identifier unit 21, configured to generate identifier information of a target access network of the second network; the second network is a network pre-registered by the user equipment that resides in the first network to which the user belongs;

The sending target identifier unit 22 is configured to move to the first network corresponding to the user equipment after the user equipment is switched to the source base station of the first network, or after the user equipment is switched to the source base station of the first network. The sex management entity transmits the identification information of the target access network of the second network generated by the target identification unit 21.

The sending target identifier unit 22 may be specifically configured to: when the user equipment is switched to the source base station of the first network, send the target access network that carries the second network to the mobility management entity of the first network that is corresponding to the user equipment. Tracking area update request message or switching confirmation message of the identification information; or

The sending target identifier unit 22 may be specifically configured to: receive a request for querying the identifier information of the target access network of the second network sent by the mobility management entity of the first network corresponding to the first network, and perform mobility management on the first network corresponding to the first network. The entity returns identification information of the target access network of the second network.

The device in the embodiment of the present invention can be used to perform the method flow described in the foregoing method embodiment, and obtain the beneficial effects of avoiding the invalidity of the S101 tunnel after the redirection.

The modules of the device in the embodiment of the present invention may be integrated into one module, or may be separately deployed. The above modules can be combined into one module, or can be further split into multiple sub-modules. A person skilled in the art can understand that all or part of the processes in the foregoing embodiments can be implemented by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. The program, when executed, may include the flow of an embodiment of the methods as described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The S101 tunnel redirection method and the related handover method and apparatus provided by the embodiments of the present invention are described in detail. The principles and implementation manners of the present invention are described in the following. The description is only for helping to understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. The contents of this specification are not to be construed as limiting the invention.

Claims

Claim

A method for redirecting an S101 tunnel, the method comprising:

In the process of the user equipment being switched by the source base station of the first network to the target base station of the first network, or after the user equipment is switched by the source base station of the first network to the target base station of the first network, the target base station of the first network corresponds to The target mobility management entity of the first network acquires identification information of the target access network of the second network from the target base station of the first network; the second network is a network pre-registered by the user equipment; target mobility of the first network The management entity establishes an S101 tunnel of the user equipment with the target access network of the second network according to the identifier information of the target access network of the second network.

The method according to claim 1, wherein in the process of the user equipment being switched by the source base station of the first network to the target base station of the first network, the first network corresponding to the target base station of the first network The step of the target mobility management entity acquiring the identity information of the target access network of the second network from the target base station of the first network includes:

The target mobility management entity of the first network acquires the identifier information of the target access network of the second network reported by the target base station of the first network; or

The target mobility management entity of the first network queries the target base station of the first network for the identifier information of the target access network of the second network, and acquires the identifier information of the target access network of the second network returned by the target base station of the first network. .

The method according to claim 2, wherein the step of the target mobility management entity of the first network acquiring the identity information of the target access network of the second network reported by the base station of the first network includes:

The target mobility management entity of the first network receives a tracking area update request message or a handover confirmation message sent by the target base station of the first network;

The target mobility management entity of the first network acquires the identification information of the target access network of the second network carried in the tracking area update request message or the handover confirmation message.

The method according to claim 2, wherein the step of the target mobility management entity of the first network querying the target base station of the first network for the identity information of the target access network of the second network comprises:

The target mobility management entity of the first network determines that the tracking area update request message or the handover confirmation message does not carry the identification information of the target access network of the second network, and triggers the target to the first network. The step of the base station querying the identification information of the target access network of the second network.

The method according to claim 1, wherein after the user equipment is switched by the source base station of the first network to the target base station of the first network, the target mobility management entity of the first network is from the first network. The step of the target base station acquiring the identification information of the target access network of the second network includes:

The target mobility management entity of the first network receives an uplink tunnel encapsulation message sent by the target base station of the first network;

The target mobility management entity of the first network acquires the identification information of the target access network of the second network carried by the uplink tunnel encapsulation message.

The method according to any one of claims 1 to 5, wherein the method further comprises: the target mobility management entity of the first network corresponding to the target base station of the first network or the source base station of the first network The source mobility management entity of the first network obtains the identifier information that is allocated to the user equipment by the source access network of the second network, and allocates the source access network of the second network to the user equipment by using the S101 tunnel. The identification information is sent to the target access network of the second network;

The target access network of the second network switches to the source access network of the second network according to the identification information allocated to the user equipment by the source access network of the second network.

7. A mobility management entity, comprising:

Obtaining a target identifier unit, configured to: when the user equipment is switched by the source base station of the first network to the target base station of the first network, or after the user equipment is switched by the source base station of the first network to the target base station of the first network, Acquiring identification information of the target access network of the second network from the target base station of the first network; the second network is a network pre-registered with the user equipment;

And establishing a tunneling unit, configured to establish, according to the identifier information of the target access network of the second network acquired by the acquiring target identifier unit, the S101 tunnel of the user equipment with the target access network of the second network.

8. The mobility management entity of claim 7 wherein:

The acquiring target identification unit is specifically configured to: when the user equipment is switched by the source base station of the first network to the target base station of the first network, or when the user equipment is switched by the source base station of the first network to the target of the first network After the base station, the identifier information of the target access network of the second network reported by the target base station of the first network is obtained.

9. The mobility management entity of claim 8 wherein:

The acquiring target identifier unit is further configured to: when the user equipment is switched by the source base station of the first network to the target base station of the first network, receive the tracking area update request message or the handover confirmation sent by the target base station of the first network. And obtaining, by the message, the tracking area update request message or the identifier information of the target access network of the second network carried in the handover confirmation message; or,

The acquiring target identification unit is further configured to: after the user equipment is switched by the source base station of the first network to the target base station of the first network, receive an uplink tunnel encapsulation message sent by the target base station of the first network, and obtain the uplink tunnel. An identification letter of the target access network of the second network carried in the encapsulated message

10. The mobility management entity of claim 7 wherein:

The acquiring target identification unit is specifically configured to: when the user equipment is switched by the source base station of the first network to the target base station of the first network, query the target base station of the first network for the identifier of the target access network of the second network. And obtaining the identification information of the target access network of the second network returned by the target base station of the first network.

11. The mobility management entity of claim 10, wherein:

The acquiring target identifier unit is further configured to: receive a tracking area update request message or a handover confirmation message sent by the target base station of the first network, and determine that the tracking area update message or the handover confirmation message does not carry the target access of the second network. When the identifier information of the network is triggered, the target base station of the first network is triggered to query the identifier information of the target access network of the second network.

The mobility management entity according to any one of claims 7 to 11, further comprising:

Obtaining a device identification unit, configured to acquire, from a target base station of the first network or a source mobility management entity of the first network corresponding to the source base station of the first network, identifier information allocated by the source access network of the second network to the user equipment ;

a tunneling unit, configured to send the identifier information of the source access network of the second network acquired by the acquiring device identification unit to the user equipment by using the S101 tunnel of the user equipment established by the establishing tunneling unit The target access network of the second network.

13. A base station, comprising:

Generating a target identification unit, configured to generate identification information of a target access network of the second network; the second network is a network pre-registered with user equipment residing in the first network to which the user belongs;

a sending target identifier unit, configured to move to the first network corresponding to the user equipment in the process of switching the user equipment from the source base station of the first network to the user equipment, or after the user equipment is switched to the source base station of the first network The management entity sends the identification information of the target access network of the second network generated by the generation target identification unit.

14. The base station according to claim 13, wherein:

The sending target identifier unit is specifically configured to: when the user equipment is switched by the source base station of the first network to In the process of the self, the tracking area update request message or the handover confirmation message carrying the identification information of the target access network of the second network is sent to the mobility management entity of the first network corresponding to the first network;

Or,

The sending target identifier unit is specifically configured to: receive, by the mobility management entity of the first network that is corresponding to the request, the request for querying the identifier of the target access network of the second network, and the mobility management entity of the first network corresponding to the first network. Returning the identification information of the target access network of the second network.