CN102036329B - Method and equipment for establishing or modifying local IP access bearer - Google Patents

Abstract

The embodiment of the present invention discloses a method and device for establishing or modifying a local IP access bearer. The method includes: receiving an attach request message sent by a user terminal; selecting the serving gateway according to the attach request message, and sending an establishment Or modify the bearer request message; receive the establishment or modification bearer response message returned by the local service gateway, and complete the local IP bearer establishment or modification process. The invention is applicable to the establishment or modification of the local IP access bearer in the mobile communication system.

Description

A method and device for establishing or modifying local IP access bearer

This application is a divisional application for a patent application with an application date of September 28, 2009, an application number of 200910177266.2, and an invention title of "a method and device for establishing or modifying a local IP access bearer".

technical field

The present invention relates to the technical field of mobile communication, in particular to a method and equipment for establishing or modifying local IP access bearer.

Background technique

For a HeNB (3G Home eNodeB, third-generation home base station) with local egress capability, the local egress bearer is passed between UE (User Equipment, user equipment) and HeNB, HeNB and L-SGW (Local Serving Gateway, local Serving Gateway), between L-SGW and L-PGW (LocalPDN Gateway, Local Packet Data Network Gateway) bearer established. The UE will establish a local default bearer during the process of attaching, detaching, location updating and service request.

When the UE is within the coverage of the HeNB cell, it can enjoy the local egress service of the HeNB. If the UE leaves the coverage of the HeNB cell, it will lose the local egress capability and can only obtain services through the core network.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

Only the UE located within the coverage of the HeNB can obtain the local egress service of the HeNB. When the UE using the local egress service moves out of the coverage of the HeNB, the local egress service will be cut off. Therefore, for a UE that frequently moves back and forth at the edge of HeNB coverage, or when the signal in the HeNB coverage area is unstable, the UE needs to continuously switch between the HeNB cell and the macro cell, the discontinuity of the local egress service will seriously affect the user's service use, resulting in poor user experience.

Contents of the invention

Embodiments of the present invention provide a method and device for establishing or modifying a local IP access bearer, which can ensure the continuity of the HeNB local egress service when the UE switches between the HeNB cell and the macro cell.

The technical scheme that the embodiment of the present invention adopts is:

A method for establishing or modifying a local IP access bearer, comprising:

The MME receives the attach request message sent by the user equipment forwarded by the base station in the S1-MME control signaling, the attach request message carries the local IP access point name, and the S1-MME control signaling carries the base station identifier and the home base station Local IP access capability;

The MME selects a serving gateway and a local packet data network gateway according to the local IP access point name and the base station identifier, and sends a bearer establishment or modification request message to the serving gateway;

The MME receives the establishment or modification bearer response message returned by the serving gateway, and completes the establishment or modification process of the local IP access bearer between the serving gateway and the local packet data network gateway.

A device for establishing or modifying a local IP access bearer, comprising:

A module for receiving an attach request message sent by the user equipment forwarded by the base station in the S1-MME control signaling, the attach request message carrying the local IP access point name, and the S1-MME control signaling carrying the base station identifier and home The local IP access capability of the base station;

A module for selecting a serving gateway and a local packet data network gateway according to the local IP access point name and the base station identifier, and sending a request message for establishing or modifying a bearer to the serving gateway;

A module that receives the establishment or modification bearer response message returned by the service gateway, and completes the establishment or modification process of the local IP access bearer between the service gateway and the local packet data network gateway.

The embodiment of the present invention establishes or modifies the local IP access bearer method and equipment. When the location of the terminal is switched, the mobility management entity first receives the handover request message sent by the evolved base station, and the handover request message carries the identity of the evolved base station, and then obtains the The local egress capability of the evolved base station establishes or modifies a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name. Compared with the existing technology, in the case that the UE needs to continuously switch between the HeNB cell and the macro cell, it can also ensure the continuity of the local egress service of the HeNB and improve the quality of user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a network structure diagram provided by Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a method for establishing or modifying a local IP access bearer provided by Embodiment 1 of the present invention;

FIG. 3 is a flowchart of a method for establishing or modifying a local IP access bearer in Scenario 1 provided by Embodiment 1 of the present invention;

FIG. 4 is a flowchart of a method for establishing or modifying a local IP access bearer in scenario 3 provided by Embodiment 1 of the present invention;

FIG. 5 is a flowchart of a method for establishing or modifying a local IP access bearer in Scenario 4 provided by Embodiment 1 of the present invention;

FIG. 6 is a flowchart of another method for establishing or modifying a local IP access bearer in Scenario 4 provided by Embodiment 1 of the present invention;

FIG. 7 is a schematic structural diagram of a device for establishing or modifying a local IP access bearer provided by Embodiment 2 of the present invention;

FIG. 8 is a schematic structural diagram of a device for establishing or modifying a local IP access bearer provided by Embodiment 3 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

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

When the evolved base station and the local packet data network gateway are a network entity, the evolved base station ID is the same as the local packet data network gateway ID, the selection of the local packet data network gateway is based on the evolved base station ID, and the evolved base station reports to the network side the evolved Base station identifier: when the evolved base station and the local packet data network gateway are different network entities, the evolved base station identifier reported by the evolved base station to the network side is replaced by the local packet data network gateway identifier. The above description is applicable to the following embodiments.

Embodiment one

The embodiment of the present invention provides a method for establishing or modifying a local IP access bearer. As shown in FIG. 1, on the basis of the existing HeNB local egress , local packet data network gateway) and the S5 interface between the core network serving gateway node S-GW (Serving Gateway, serving gateway). When the bearer is updated, the network will update the bearer to the core network S-GW and HeNB local Between the L-PGWs on the network, the core network data is detoured to the local HeNB, ensuring the business continuity of the local egress. As shown in Figure 2, the method for establishing or modifying the local IP access bearer includes:

201. The mobility management entity receives a handover request message sent by an evolved base station, where the handover request message carries an identifier of an evolved base station, and the evolved base station includes a source evolved base station or a target evolved base station, and the identifier of the evolved base station is related to the local packet data network gateway The identity of the eNB is the same, for example, the identity of the evolved base station is the IP address of the local packet data network gateway, etc.;

202. The mobility management entity acquires the local egress capability of the evolved base station;

The mobility management entity may receive the handover request message sent by the source eNB, where the handover request message carries information about the local egress capability of the active eNB, so that the mobility management entity may obtain the information of the source eNB. local export capacity.

The mobility management entity may also receive the handover request acknowledgment message sent by the target eNB, the handover request acknowledgment message carrying information about the local egress capability of the target eNB, so that the mobility management entity may acquire the target eNB The local export capability of the base station;

The mobility management entity may also obtain information about the local egress capability of the target eNB by querying, thereby acquiring the local egress capability of the target eNB.

When obtaining the information of the local egress capability of the target eNB by querying, the mobility management entity first sends a handover request message to the target eNB, and the handover request message includes a query flag instructing the target eNB to return local egress indication information information; the target eNB returns a handover request acknowledgment message to the mobility management entity after receiving the handover request message containing the query flag information, the handover request acknowledgment message carries the local egress indication of the target eNB, and the local egress Indicating information indicating the local egress capability of the target eNB;

203. The mobility management entity establishes or modifies a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name, the The service gateway is located in the core network or evolved base station;

Wherein, the establishment or modification of the local IP access bearer between the service gateway and the local packet data network gateway may specifically include:

The mobility management entity selects a serving gateway and a local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name; and sends a modify bearer request message to the selected serving gateway, so that The service gateway sends a modify bearer request message to the local packet data network gateway and receives a modify bearer response message returned by the local packet data network gateway; then receives the modify bearer response message returned by the service gateway; and finally modifies the bearer It is the bearer between the serving gateway and the selected local packet data network gateway.

Wherein, after the mobility management entity selects the local packet data network gateway, a serving gateway relocation process needs to be performed to relocate the serving gateway as the local serving gateway of the home base station.

Further, before the mobility management entity receives the handover request message sent by the evolved base station, a process of establishing a local IP access bearer is also included, wherein the establishment of a local IP access bearer may specifically include:

Select the local packet data network gateway and server gateway according to the local IP access point name and the home base station identifier;

sending a bearer establishment or modification request message to the serving gateway;

Receive the establishment or modification bearer response message returned by the serving gateway, and complete the establishment or modification of the bearer process between the serving gateway and the local packet data network gateway.

Further, before selecting the local packet data network gateway and the serving gateway according to the local IP access point name and the home base station identifier, it also includes:

receiving an attach request message sent by the user terminal, where the request message carries the local IP access point name; and

The home base station receives a forwarding network access server message, where the forwarding network access server message carries the home base station identifier; or,

receiving a tracking area update message sent by the user terminal, the tracking area update message carrying the local IP access point name; and

The home base station identifier is obtained from the user terminal's allowed limited user group list, and the home base station identifier indicates a home base station identifier that can be used as a local IP egress in a cell of a limited user group that the UE is allowed to access.

Further, after the process of establishing or modifying the bearer between the serving gateway and the local packet data network gateway is completed, the method further includes:

The home base station sends an attach accept message to the user terminal, where the attach accept message indicates that the user terminal is authorized for local IP access by the network.

Further, after receiving the tracking area update message sent by the user terminal, it further includes:

Judging that the user terminal is authorized to use local IP access, and there is a limited user group cell that allows the user terminal to access in the current tracking area where the user terminal resides;

The judging that the user terminal is authorized to use local IP access includes:

judging whether the restricted user group identifier in the allowed restricted user group list of the user terminal is the same as the cell identifier under the tracking area;

If they are the same, the tracking area includes a limited user group cell that the user terminal is allowed to access;

If there are more than one restricted user group cells in the tracking area whose restricted user group identifiers are in the allowed restricted user group list of the user terminal, select a restricted user group cell with a high priority,

According to the restricted user group identifier and the local IP access femtocell identifier in the allowed restricted user group list of the user terminal, the femtocell identifier that establishes the local egress for the user terminal is obtained.

In the method for establishing or modifying the local IP access bearer provided by the embodiment of the present invention, when the location of the terminal is switched, the mobility management entity first receives the handover request message sent by the evolved base station, the handover request message carries the identity of the evolved base station, and then obtains the The local egress capability of the evolved base station establishes or modifies a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name. Compared with the existing technology, in the case that the UE needs to continuously switch between the HeNB cell and the macro cell, it can also ensure the continuity of the local egress service of the HeNB and improve the quality of user experience.

The method for establishing or modifying a local IP access bearer provided by the embodiment of the present invention will be described in detail below in combination with specific scenarios.

In this embodiment of the present invention, the decision to trigger a relocation via S1 may be: Decision to trigger a relocation via S1. The handover requirement message may be a Handover Required message. The forwarding relocation request message may be: Forward Relocation Request message. The handover request message may be a Handover Request message. The handover request confirmation message may be a Handover RequestAcknowledge message. The update bearer request message can be: Update Bearer Request message or modify bearer request message: Modify Bearer Request message. The update bearer request response message can be: Update Bearer Request Response message or modify bearer response message: Modify BearerResponse message.

Scenario 1: HeNB local LIPA bearer establishment

In this scenario, the attach request message may be an Attach Request message. The establishment of a default bearer request message can be: Create Default Bearer Request message or session establishment request: CreateSession Request message. The establishment default bearer response message can be: Create Default BearerResponse message or create session corresponding message Create Session Response. The initial context setup request message may be: Initial Context Setup Request message. The attachment acceptance message may be: Attach Accept message. The radio resource control connection reconfiguration message may be: RRC ConnectionReconfiguration message.

For the local L-SGW and L-PGW of the HeNB, since they are set on the HeNB, the L-SGW ID and the L-PGW ID are set to have the same ID as the HeNB, that is, the HeNB ID.

There are two ways to establish a LIPA bearer:

Method 1: The UE requests a LIPA service from the core network, and the core network establishes a LIPA bearer for the UE that is allowed to execute LIPA.

Mode 2: The network allows the UE performing the LIPA service to obtain the LIPA permission indication information issued by the core network during the attachment process. When the UE initiates the LIPA service, the core network establishes a LIPA bearer for the UE.

As shown in Figure 3, the method flow of mode 1 includes:

31) The UE sends an attach request message to the base station. The attach request message carries an APN for LIPA access, indicating that the UE requests the network for HeNB's local IP access to the PDN, as indicated by LIPA APN.

32) The base station obtains the MME (Mobility Management Entity, Mobility Management Entity) according to the S-TMSI (Temporary Mobile Subscriber Identity) and the indication of the selected network. If the MME is not available, select the MME through the MME selection function. Then the base station forwards the attach request message to the MME in the S1-MME control signaling, and the message also carries the eNB ID of the base station and/or the LIPA capability of the HeNB, as indicated by LBOIndication (Local Breakout Indication, local breakout indication).

33) If the network allows the UE to execute LIPA, the LIPA allowed subscription information will be stored in the subscription information of the UE. The MME receives the LIPA request of the UE, and performs LIPA access judgment according to the LIPA subscription information of the UE, the eNBID of the base station and/or the LIPA capability of the HeNB. If allowed, the MME selects the local L-PGW and L-SGW to the base station according to the LIPA APN and eNB ID. The MME sends a Create Default Bearer Request message to the L-SGW (the Create Default Bearer Request message can be a Create Default Bearer Request message or a session establishment request).

34) The L-SGW creates an entry in its EPS (Evolved Packet System, Evolved Packet System) bearer list, and sends a request message to establish a default bearer to the L-PGW.

35) The L-PGW returns a default bearer establishment response message to the L-SGW.

36) The L-SGW returns a response message of establishing a default bearer to the MME.

Afterwards, perform other attachment procedures in 23.401.

Method 2 includes:

1) The UE sends an attach request message to the base station.

2) The base station obtains the MME according to the S-TMSI and the indication of the selected network. If the MME is not available, select the MME through the MME selection function. Then the base station forwards the attach request message to the MME in the S1-MME control signaling, and the message also carries the eNB ID of the base station and/or the LIPA capability of the HeNB, as represented by LBOIndication.

3) If the network allows the UE to execute LIPA, the LIPA allowed subscription information will be stored in the subscription information of the UE. The MME performs LIPA access judgment according to the UE's LIPA subscription information and the LBO.

The MME selects an S-GW to send the Bearer Establishment Request message. If the MME judges that the UE's LIPA access is permitted, the message carries a LIPA permission indication message, which can be represented by, for example, LIPA Indication.

Steps 4) to 8) are the same as the attachment process in 23.401, and the messages sent in these steps all need to carry the LIPA indication message LIPA Indication.

Subsequently, the UE sends a LIPA service request message to the MME.

Referring to steps 31) to 37) in the first manner, the LIPA bearer of the UE is established.

In this embodiment, the attachment process is taken as an example for illustration, which is also applicable to the service request, location update, and detachment processes, and these processes will not be repeated here.

Scenario 2: After the S-GW is relocated to the core network, the network architecture that maintains the continuity of the local egress

On the basis of the existing local egress network architecture of the HeNB, an interface L-S5 between the S-GW and the L-PGW is added. When the UE location is updated or switched, the local L-SGW is relocated to the core network S-GW. According to the HeNB's local egress indication - LBO Indication and/or HeNB ID (that is, L-PGW ID), the LIPA APN addresses the HeNB's local L-PGW, and establishes the bearer between the core network S-GW and the L-PGW. When the UE is in Active mode and switches from a HeNB cell that allows it to access to a non-CSG cell, and the HeNB receives a downlink LIPA packet, the L-PGW will tunnel the packet to the S-GW of the core network, thereby ensuring The UE can receive the local packet data from the HeNB. On the premise that the continuity of the local egress cannot be guaranteed, when the UE has handed over to a non-CSG cell, a downlink LIPA packet arrives at the HeNB, but the HeNB does not know how to transmit the packet, it will tunnel the packet to the PDN GW, The packet is thus treated as non-LIPA traffic.

Scenario 3: This embodiment mainly solves the method of ensuring the continuity of the local egress of the Femtocell after the UE moves from the coverage area of the Femtocell of the CSG cell that it is allowed to access to the macro cell in the CSG scenario.

As shown in Figure 4, the method includes:

41) The source base station decides to initiate a handover to the target base station based on S1.

42) The source base station sends a handover requirement message to the source MME. The handover request message may include the following parameters: transparent transmission container from source base station to target base station, target base station identifier, S1 AP reason, selected location area identifier, etc. The message carries the eNB ID and LBO Indication of the source base station.

43) If the MME needs to be relocated, the source MME sends a Forward Relocation Request message to the target MME. The following parameters may be included in the forwarding relocation request message: MME UE context, transparent transmission container from source base station to target base station, and target base station eNB ID.

44) Execute the S1-based handover procedure step in 23.401.

45) The MME selects the local PDN GW on the source base station, that is, the L-PGW, according to the LIPA APN and the eNB ID of the source base station. The local L-SGW of the source base station is relocated to the SGW of the core network.

An update bearer request message sent by the MME to the SGW. The bearer update request message includes the following parameters: eNBID, the TEID of the EPS bearer allocated by the target base station for receiving the downlink service on S1-U, etc.

46) The SGW sends a bearer update request message to the L-PGW. After receiving the Bearer Update Request message, the L-PGW updates its context.

47) The L-PGW returns an update bearer response message to the SGW. The update bearer response message includes the following parameters: PDN GW address, TEID, MSISDN, etc.

48) The SGW sends a bearer update response message to the MME. The update bearer response message includes the following parameters: PDN GW address, TEID, etc.

Through the above process, the UE is handed over from the source base station to the target base station, and the bearer is updated to the local LIPA bearer of the source base station.

Scene four:

This scenario mainly solves that when the UE enters the TA where the home base station is allowed to access, the network establishes a local IP egress bearer between the core network S-GW and the local L-PGW of the home base station for the UE, so as to ensure that the UE is in the home base station. Continuity of local egress services when moving within the TA.

This embodiment is mainly described according to two steps. Firstly, during the location update process, the network makes a judgment to establish a local egress bearer for the UE; secondly, when the UE switches from a macro cell to a cell covered by a HNB, the update process of the local egress bearer.

1. The establishment of the UE's local egress bearer during the TAU process

If no MME relocation occurs before and after the handover, the following steps between the source MME and the target MME can be omitted and not executed, and the source MME and the target MME are the same MME.

If no SGW relocation occurs before and after the handover, the following steps between the source SGW and the target SGW can be omitted and not executed, and the source SGW and the target SGW are the same SGW.

The trigger location update process can be: Trigger to start TAU procedure. The TAU request message may be: TAU Request message. The bearer establishment request message can be: Create Bearer Request message or session establishment request message: Create Session Request message. The update bearer request message can be: Update Bearer Request message or modify bearer request message: Modify BearerRequest message. The update bearer response message can be: Update Bearer Response message or modify bearer response message: Modify Bearer Response message. The bearer establishment response message can be: Create Bearer Response message or session establishment response message: Create Session Response message.

Here, in order for the network to find the home base station containing the L-PGW, it is necessary to add in the ACL of the UE the HeNB ID that can be used as a local egress in the CSG cell that the UE is allowed to access, which is represented by LIPA HeNBID.

As shown in Figure 5, the method includes:

51) A decision is made to trigger a TAU procedure.

52) The UE sends a TAU request message to the base station. The TAU request message may include the following parameters: UE's core network capability, last accessed TAI, activation identifier, EPS bearer status, etc. The LIPA APN is carried in the TAU request message.

53) The base station forwards the UE's TAU request message to the target MME.

54) After the MME receives the UE's TAU request message, it needs to make two-step judgments. First, it needs to judge whether the network allows the LIPA service requested by the UE. The judging method is the same as the judging process in the process of establishing the local default bearer.

Secondly, it is judged whether there is a CSG cell that the UE is allowed to access in the TA where the UE is currently located. The judging method is: the MME judges whether the CSG ID in the ACL of the UE is the same as the CSG ID in the cell ID-Cell ID of the cell under the TA. If they are the same, it means that the TA includes a CSG cell that the UE is allowed to access. If the MME judges that there is more than one CSG cell whose CSG ID is in the UE's ACL under the TA, it will select the CSG cell with the highest priority according to the priority order. Afterwards, the MME obtains the HeNB ID that can establish a local egress for the UE according to the CSG ID and LIPA HeNB ID in the ACL of the UE.

According to the HeNB ID and LIPA APN, the MME selects the L-PGW on the HeNB that allows the UE to access and can be used as a local IP egress.

The MME selects an S-GW to send the Bearer Establishment Request message. The bearer establishment request message may include the following parameters: IMSI, bearer context, MME address and TEID, type and so on.

55) The S-GW sends an update bearer request message to the L-PGW selected by the MME. The update bearer request message may include the following parameters: S-GW address and TEID, RAT type, etc.

56) The L-PGW returns an update bearer response message to the S-GW. The update bearer response message may include the following parameters: MSISDN, PDN GW address, TEID, etc.

57) The S-GW returns a bearer establishment response message to the MME. The bearer establishment response message may include the following parameters: S-GW address, TEID and so on.

58) Execute the location update process in 23.401.

Through the above process, the LIPA bearer between the S-GW of the core network and the local L-PGW of the home base station is established for the UE.

2. Handover process of UE moving from macro cell to HeNB cell

As shown in Figure 6, the method includes:

61) The source base station decides to initiate a handover to the target base station based on S1.

62) The source base station sends a handover request message to the source MME. The handover request message may include the following parameters: transparent transmission container from source base station to target base station; target base station identifier, S1 AP reason, selected location area identifier, etc.

63) If the MME needs to be relocated, the source MME sends a Forward Relocation Request message to the target MME. The forwarding relocation request message may include the following parameters: MME UE context, transparent transmission container from the source base station to the target base station, and eNB ID.

64) The target MME sends a handover request message to the target base station. The handover request message can include the following parameters: EPS bearer to be established, AMBR, S1 AP reason, source base station to target base station transparent transmission container, handover restriction list, etc. The handover request message carries the query flag of the local egress capability indication information of the base station, as indicated by LBO Required Indication.

65) The target base station sends a handover request confirmation message to the target MME. The handover request confirmation message may include the following parameters: EPS bearer establishment result, transparent transmission container from the target base station to the source base station, and the like. The handover request acknowledgment message carries local egress capability indication information, such as represented by LBO Indication. The LBOIndication may also be carried in the message and sent to the target MME without going through the query process in step 4).

66) Execute the S1-based handover procedure step in 23.401.

67) The MME selects the local PDN GW on the target base station, that is, the L-PGW, according to the LIPA APN and the eNB ID. The S-GW is relocated from the core network to the local L-SGW of the target base station.

An update bearer request message sent by the MME to the L-SGW. The bearer update request message includes the following parameters: eNB ID, for receiving downlink services on S1-U, the TEID of the EPS bearer allocated in the target base station for receiving, etc.

68) The L-SGW sends a bearer update request message to the L-PGW. After receiving the Bearer Update Request message, the L-PGW updates its context.

69) The L-PGW returns an update bearer response message to the L-SGW. The update bearer response message includes the following parameters: PDN GW address, TEID, MSISDN, etc.

610) The L-SGW sends a bearer update response message to the MME. The update bearer response message includes the following parameters: PDN GW address, TEID, etc.

Through the above process, the UE is handed over from the source base station to the target base station, and the bearer is updated to the local LIPA bearer of the target base station.

In the method for establishing or modifying the local IP access bearer provided by the embodiment of the present invention, when the location of the terminal is switched, the mobility management entity first receives the handover request message sent by the evolved base station, the handover request message carries the identity of the evolved base station, and then obtains the The local egress capability of the evolved base station establishes or modifies a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name. Compared with the existing technology, in the case that the UE needs to continuously switch between the HeNB cell and the macro cell, it can also ensure the continuity of the local egress service of the HeNB and improve the quality of user experience.

Embodiment two

An embodiment of the present invention provides a device for establishing or modifying a local IP access bearer. As shown in FIG. 7, the device includes:

The receiving module 701 is configured to receive a handover request message sent by an evolved base station, where the handover request message carries an identifier of an evolved base station, and the evolved base station includes a source evolved base station or a target evolved base station, and the identifier of the evolved base station is related to the local packet data network gateway have the same identity;

An obtaining module 702, configured to obtain the local egress capability of the evolved base station;

An establishment or modification module 703, configured to establish or modify a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name, The serving gateway is located in a core network or an evolved base station.

In the device for establishing or modifying the local IP access bearer provided by the embodiments of the present invention, when the location of the terminal is switched, the mobility management entity first receives the handover request message sent by the evolved base station, and the handover request message carries the identity of the evolved base station, and then obtains The local egress capability of the evolved base station establishes or modifies a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name. Compared with the existing technology, in the case that the UE needs to continuously switch between the HeNB cell and the macro cell, it can also ensure the continuity of the local egress service of the HeNB and improve the quality of user experience.

Embodiment three

An embodiment of the present invention provides a device for establishing or modifying a local IP access bearer. As shown in FIG. 8, the device includes:

The receiving module 701 is configured to receive a handover request message sent by an evolved base station, where the handover request message carries an identifier of an evolved base station, and the evolved base station includes a source evolved base station or a target evolved base station, and the identifier of the evolved base station is related to the local packet data network gateway have the same identity;

An obtaining module 702, configured to obtain the local egress capability of the evolved base station;

An establishment or modification module 703, configured to establish or modify a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name, The serving gateway is located in a core network or an evolved base station.

Wherein, the acquisition module 702 includes at least any of the following units:

The first acquiring unit 7021 is configured to acquire the information of the local egress capability of the source evolved base station according to the handover request message sent by the source evolved base station received by the receiving module 701;

The second acquiring unit 7022 is configured to receive a handover request confirmation message sent by the target eNB, and acquire the local egress capability of the target eNB according to the handover request confirmation message, wherein the handover request confirmation message carries Information on the local egress capability of the target evolved base station;

The third obtaining unit 7023 is configured to query and obtain information about the local egress capability of the target eNB.

Wherein, the establishment or modification module 703 includes:

A selection unit 7031, configured to select a service gateway and a local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name;

The sending unit 7032 is configured to send a modification bearer request message to the selected service gateway, so that the service gateway sends a modification bearer request message to the local packet data network gateway and receives a modification bearer returned by the local packet data network gateway response message;

The receiving unit 7033 is configured to receive the modify bearer response message returned by the service gateway;

The modifying unit 7034 is configured to modify the bearer to be the bearer between the core network service gateway and the selected local packet data network gateway after the receiving module 701 receives the modify bearer response message returned by the service gateway.

Among other things, the device also includes:

The sending module 704 is configured to send an attach accept message to the user terminal through the home base station, where the attach accept message indicates that the user terminal is authorized for local IP access by the network.

Wherein, after the sending module 704 sends an attach accept message to the user terminal through the home base station, the receiving module 701 is further configured to receive an attach request message or a tracking area update message sent by the user terminal, the attach request message or tracking area The update message carries the name of the local IP access point.

Among other things, the device also includes:

A judging module 705, configured to judge that the user terminal is authorized to use local IP access, and there exists a limited user group cell that allows the user terminal to access in the current tracking area where the user terminal resides.

The judging module 705 is specifically used to judge whether the restricted user group identifier in the allowed restricted user group list of the user terminal is the same as the cell identifier under the tracking area; if they are the same, then the tracking area contains The restricted user group cell that the user terminal is allowed to access; if there is more than one restricted user group cell with a restricted user group identifier in the tracking area in the user terminal's allowed restricted user group list, select High priority limited user group cells;

Afterwards, the judging module 705 obtains the home base station identification for establishing a local egress for the user terminal according to the limited user group identification and the local IP access home base station identification in the user terminal's allowed limited user group list.

In the device for establishing or modifying the local IP access bearer provided by the embodiments of the present invention, when the location of the terminal is switched, the mobility management entity first receives the handover request message sent by the evolved base station, and the handover request message carries the identity of the evolved base station, and then obtains The local egress capability of the evolved base station establishes or modifies a local IP access bearer between the serving gateway and the local packet data network gateway according to the evolved base station identifier, the local egress capability of the evolved base station, and the local IP access point name. Compared with the existing technology, in the case that the UE needs to continuously switch between the HeNB cell and the macro cell, it can also ensure the continuity of the local egress service of the HeNB and improve the quality of user experience.

The embodiment of the present invention is applicable to the EPS system, but is not limited thereto, and may also be applicable to other mobile communication systems such as UMTS (Universal Mobile Telecommunication System, universal mobile communication system).

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (5)

1. A method for establishing or modifying a local IP access bearer, characterized in that it comprises: The MME receives the attach request message sent by the user equipment forwarded by the base station in the S1-MME control signaling, the attach request message carries the local IP access point name, and the S1-MME control signaling carries the base station identifier and the home base station Local IP access capability; The MME selects a serving gateway and a local packet data network gateway according to the local IP access point name and the base station identifier, and sends a bearer establishment or modification request message to the serving gateway; The MME sends the establishment or modification bearer request message to the local packet data network gateway through the serving gateway, so that the local packet data network gateway returns a establishment or modification bearer response message to the serving gateway; The MME receives the establishment or modification bearer response message returned by the serving gateway, and completes the establishment or modification process of the local IP bearer between the serving gateway and the local packet data network gateway. 2. The method according to claim 1, characterized in that, before the selection of the serving gateway and the local packet data network gateway, and sending the establishing or modifying bearer request message to the serving gateway, further comprising: The MME performs local IP access judgment according to the subscription information of the user terminal and the local IP access capability of the home base station; If the MME judges that local IP access is allowed, then select a serving gateway and a local packet data network gateway according to the local IP access point name and the base station identifier. 3 . The method according to claim 2 , wherein the subscription information of the user terminal includes: local IP access permission subscription information. 4 . 4. A device for establishing or modifying a local IP access bearer, characterized in that it comprises: A module for receiving an attach request message sent by the user equipment forwarded by the base station in the S1-MME control signaling, the attach request message carrying the local IP access point name, and the S1-MME control signaling carrying the base station identifier and home The local IP access capability of the base station; A module for selecting a serving gateway and a local packet data network gateway according to the local IP access point name and the base station identifier, and sending a request message for establishing or modifying a bearer to the serving gateway; A module that receives the establishment or modification bearer response message returned by the service gateway, and completes the establishment or modification process of the local IP access bearer between the service gateway and the local packet data network gateway; Wherein, the module that receives the establishment or modification bearer response message returned by the serving gateway and completes the establishment or modification process of the local IP access bearer between the serving gateway and the local packet data network gateway includes: sending the establishing or modifying bearer request message to the local packet data network gateway through the serving gateway so that the local packet data network gateway returns a unit establishing or modifying a bearer response message to the serving gateway; A unit that receives the establish or modify bearer response message returned by the serving gateway, and completes the process of establishing or modifying the local IP bearer between the serving gateway and the local packet data network gateway. 5. The device according to claim 4, further comprising: A module for performing local IP access judgment according to the subscription information of the user terminal and the local IP access capability of the home base station; If the MME judges that local IP access is allowed, select modules of a serving gateway and a local packet data network gateway according to the local IP access point name and the base station identifier.

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