WO2011063754A1

WO2011063754A1 - User equipment handover method and home evolved node b

Info

Publication number: WO2011063754A1
Application number: PCT/CN2010/079108
Authority: WO
Inventors: 刘爱娟; 汪颖; 李吉华
Original assignee: 电信科学技术研究院
Priority date: 2009-11-27
Filing date: 2010-11-25
Publication date: 2011-06-03
Also published as: CN102014449B; CN102014449A

Abstract

A User Equipment (UE) handover method and a Home evolved Node B (HeNB) are provided in the present application. The method includes the following steps: a source HeNB determines that a UE needs to be handed over to a target HeNB (401); after performing the handover procedure with the target HeNB through X2 interface, the source HeNB hands over the UE to the target HeNB (402). The present application enables the handover procedure through X2 interface, and simplifies the handover procedure which is currently realized through S1 interface.

Description

User equipment switching method and home-based evolution base station

The present invention relates to mobile communication technologies, and in particular, to a handover method of a user equipment and a home evolved base station. Background technique

FIG. 1 is a network architecture of an E-UTRAN (Evolved Global Terrestrial Radio Access Network) including a HeNB (Home eNB, Home Evolved Base Station) in 3GPP R9 (Release 9). The eNB (Evolved Base Station) is an X2 interface, and the eNB and the MME (Mobility Management Entity) are S1 interfaces. The HeNB can be directly connected to the MME or through a centralized node HeNB GW (Gateway, Gateway). Connected to the MME, there is no interface between the HeNBs, and the HeNB can only be connected to one HeNB GW at the same time.

2 is a schematic diagram of a process in which a UE (User Equipment) performs handover between HeNBs through an SI interface. In the network architecture shown in FIG. 1, there is no X2 interface between HeNBs, and therefore, handover is implemented through an S1 interface. . As shown in Figure 2, the handover process includes the following steps:

Step 201: If the source HeNB considers that the UE can handover to the target HeNB, send a handover required message to the MME, where the message carries the CS Closed Subscriber Group of the target HeNB, and the closed user group ID (identification). If the target HeNB is in the hybrid mode, the access mode of the target HeNB needs to be carried;

Step 202: The MME performs access control on the UE according to the CSG ID of the target HeNB reported by the source HeNB and the allowed CSG list (the allowed CSG list) of the saved UE.

Step 203: If the UE allows, the MME sends a handover request message to the target HeNB, where the message carries the CSG ID of the target HeNB. If the target HeNB is in the hybrid mode, the message also needs to carry the UE membership IE (UE member). Information element; IE: information element, information element). Step 204: The target HeNB confirms whether the CSG ID received from the handover request message matches its own CSG ID. If a match is confirmed, the appropriate resources are allocated in the target HeNB. If the target HeNB is in a hybrid mode, the target HeNB also needs to perform different admission control and rate control on the UE according to the UE membership.

Step 205: The target HeNB sends a handover request ack message to the MME.

Step 206: The MME sends a handover command message to the source HeNB. The disadvantages of the prior art are: At present, the UEs in the Intra-CSG (within the CSG) can only switch through the S1 interface when switching between HeNBs. Summary of the invention

An object of the present invention is to provide a UE handover method and a home evolved base station.

A method for switching a UE is provided in the embodiment of the present invention, including:

The source HeNB determines that the UE needs to handover to the target HeNB;

After performing the handover procedure with the target HeNB through the X2 interface, the source HeNB switches the UE to the target HeNB.

A method for switching a UE is also provided in the embodiment of the present invention, including:

The target HeNB determines the source HeNB to which the UE to be handed over belongs;

After performing the handover procedure with the source HeNB through the X2 interface, the target HeNB switches the UE into the target HeNB.

In the embodiment of the present invention, a home evolved base station is provided, including:

a target determining module, configured to determine a target HeNB to which the UE needs to handover;

And a switching module, configured to switch the UE to the target HeNB after performing the handover procedure with the target HeNB through the X2 interface.

The embodiment of the present invention further provides a home evolved base station, including:

a source determining module, configured to determine a source HeNB to which the UE to be handed over belongs;

a switching module, configured to switch the UE after performing a handover procedure with the source HeNB through the X2 interface Come in.

The beneficial effects of the present invention are as follows:

The target HeNB can directly learn from the source HeNB whether the UE is a signing member of the target HeNB through the X2 interface, and perform different admission control and rate control on the UE, thereby implementing the handover process through the X2 interface, and simplifying the current implementation through the S1 interface. The switching process. DRAWINGS

1 is a schematic diagram of a network architecture in which the E-UTRAN includes a HeNB in the 3GPP R9 in the prior art; FIG. 2 is a schematic flowchart of a handover of a UE between the HeNBs through the S ί interface in the prior art; FIG. 3 is a 3GPP according to an embodiment of the present invention; The network architecture when the HeNB is deployed in the R10; FIG. 4 is a schematic flowchart of the UE switching on the source HeNB side in the embodiment of the present invention; FIG. 5 is a schematic flowchart of establishing an X2 interface between HeNBs according to an embodiment of the present invention; 6 is a schematic flowchart of a handover between a UE and an HeNB through an X2 interface according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a process for implementing handover of a UE on a target HeNB side according to an embodiment of the present invention; FIG. 8 is a schematic structural diagram of a home evolved base station as a source base station according to an embodiment of the present invention; A schematic diagram of the structure of a home evolved base station of a base station. detailed description

Currently, there is no X2 interface between the HeNBs, and the UE's handover between the HeNBs is implemented through the S1 interface, and the MME performs access control on the UE. However, in 3GPP RIO (3GPP Release 10), an X2 interface will be introduced between HeNBs. 3 is a network architecture when the HeNB is deployed in the 3GPP R10. As shown in FIG. 3, the 3GPP R10 supports the establishment of an X2 interface between the HeNBs. Based on this, the embodiment of the present invention provides a solution, in the 3GPP R10, The handover of the UE of the Intra-CSG between the HeNBs is performed using the X2 interface. Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 4 is a schematic flowchart of implementing handover of a UE on a source HeNB side, where the handover method includes the following steps: Step 401: The source HeNB determines that the UE needs to handover to the target HeNB.

Step 402: After performing the handover procedure with the target HeNB through the X2 interface, the source HeNB switches the UE to the target HeNB.

In a specific implementation, in the handover process, the source HeNB may notify the target HeNB whether the UE to be handed over is a CSG member (CSG member) or a non-CSG member (non-CSG member) through the X2 interface message, and the target HeNB may perform the UE according to the message. Admission control and rate control, so as to implement UE handover through the X2 interface, and to simplify the current handover process of the UE through the S1 interface.

In a specific implementation, the HeNB can learn the CSG ID of the neighboring HeNB through the X2 interface setup message, and can also learn whether the UE to be handed over is a CSG member through the handover request message, so that the UE can be implemented in the hybrid mode between the HeNBs through the X2 interface. Switching. The explanations are as follows.

First, the X2 interface needs to be established between the HeNBs. When the source HeNB performs the handover process with the target HeNB through the X2 interface, the source HeNB may include:

The source HeNB sends an X2 SETUP REQUEST message to the target HeNB through the X2 interface, where the message carries the CSG ID of the source HeNB.

FIG. 5 is a schematic flowchart of establishing an X2 interface between HeNBs, as shown in FIG. 5, which may include the following steps:

Step 501: The source HeNB sends an X2 SETUP REQUEST message to the target HeNB, where the message carries the CSG ID of the source HeNB.

Step 502: The target HeNB saves the information of the source HeNB, including the CSG ED of the source HeNB. Step 503: The target HeNB sends an X2 SETUP RESPONSE message to the source HeNB, where the message carries the CSG ID of the target HeNB.

Step 504: The source HeNB saves information of the target HeNB, where the target HeNB includes the CSG.

ID.

Through the above process, the HeNB can learn the CSG ID of the neighboring HeNB.

When the UE switches between HeNBs, the source HeNB performs cutting with the target HeNB through the X2 interface. The change process can include:

The source HeNB sends a handover request message to the target HeNB through the X2 interface, where the message carries the UE membership IE.

FIG. 6 is a schematic diagram of a process for a UE to perform handover between HeNBs through an X2 interface. As shown in FIG. 6, the method may include the following steps:

Step 601: The source HeNB determines that the CSG ID of the target HeNB is the same as the CSG ID of the neighboring HeNB. The CSG ID of the neighboring HeNB can be obtained through the X2 interface establishment process. Therefore, the MME is not required to perform access control on the UE. The source HeNB may decide to initiate an X2 handover.

Step 602: The source HeNB sends a handover request message to the target HeNB. If the target HeNB is in the hybrid mode, the message further carries the UE membership IE.

Step 603: The target HeNB determines whether the UE can access according to the current resource status. If the target HeNB is in the hybrid mode, different admission control and rate control should be performed on the CSG member UE and the non CSG member UE according to the UE membership.

Step 604: The target HeNB sends a handover request ack message to the source HeNB.

Correspondingly, the embodiment of the present invention further provides a solution for implementing handover of a UE on a target HeNB side, which is described below.

FIG. 7 is a schematic flowchart of implementing handover of a UE on a target HeNB side. As shown in FIG. 7, the switching method may include the following steps:

Step 701: The target HeNB determines a source HeNB to which the handover UE belongs.

Step 702: After performing the handover procedure with the source HeNB through the X2 interface, the target HeNB switches the UE into the target HeNB.

In the implementation, when the target HeNB performs the handover process with the source HeNB through the X2 interface, the method may include:

The target HeNB receives the X2 SETUP REQUEST message sent by the source HeNB through the X2 interface, where the message carries the CSG ID of the source HeNB;

The target HeNB sends an X2 SETUP RESPONSE message to the source HeNB, where the message carries the CSG ID of the target HeNB. In an implementation, when the target HeNB performs the handover process with the source HeNB through the X2 interface, the method may include:

The target HeNB receives the handover request message sent by the source HeNB through the X2 interface, where the message carries the UE membership IE;

When the target HeNB determines that the target HeNB is in the hybrid mode, different admission control and rate control are performed on the CSG member UE and the non CSG member UE according to the UE membership.

The target HeNB sends a handover request ack message to the source HeNB through the X2 interface. Based on the same inventive concept, the embodiment of the present invention further provides a home evolved base station. Since the principles of the HeNBs are similar to the handover methods of the UE, the implementation of the HeNBs may refer to the implementation of the method, and the repetitions are not mentioned. .

FIG. 8 is a schematic structural diagram of a home evolved base station as a source base station. As shown in FIG. 8, the HeNB may include:

a target determining module 801, configured to determine a target HeNB to which the UE needs to handover;

The switching module 802 is configured to switch the UE to the target HeNB after performing the handover procedure with the target HeNB through the X2 interface.

In an implementation, the switching module 802 is further configured to send an X2 SETUP REQUEST message to the target HeNB through the X2 interface, where the message carries the CSG ID of the source base station.

In an implementation, the handover module 802 is further configured to send a handover request message to the target HeNB through the X2 interface, where the message carries the UE membership IE.

FIG. 9 is a schematic structural diagram of a home evolved base station as a target base station. As shown in FIG. 9, the HeNB may include:

The source determining module 901 is configured to determine a source HeNB to which the UE to be handed in belongs to;

The switching module 902 is configured to switch the UE after the handover process is performed with the source HeNB through the X2 interface.

In an implementation, the switching module 902 is further configured to receive, by using an X2 interface, a source HeNB to send The X2 SETUP REQUEST message, where the message carries the CSG ID of the source HeNB; and sends an X2 SETUP RESPONSE message to the source HeNB, where the message carries the CSG of the target base station

In an implementation, the handover module 902 is further configured to receive, by using an X2 interface, a handover request message sent by the source HeNB, where the message carries a UE membership IE; and when determining that the target base station is in a hybrid mode, according to the UE membership to the CSG member UE Different admission control and rate control are performed with the non CSG member UE.

In an implementation, the handover module 902 is further configured to send a handover request ack message to the source HeNB through the X2 interface.

For convenience of description, each part of the above apparatus is described by function into various modules or units. Of course, the functions of the various modules or units can also be implemented in one or more software or hardware when implementing the present invention.

It can be seen from the above embodiment that, in the handover process, if the source HeNB and the target HeNB support the same CSG, the source HeNB may notify the target HeNB UE whether it is a signing member of the target HeNB through an X2 interface message, and the target HeNB may The message performs different admission control and rate control on the UE, so that the UE of the intra-CSG performs handover between the HeNBs through the X2 interface.

Since the target HeNB can directly learn from the source HeNB whether the UE is a subscription member of the target HeNB, to perform different admission control and rate control on the UE, thereby implementing the handover process through the X2 interface, thereby simplifying the current handover process through the S1 interface. .

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Thus, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment of a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that each of the processes and/or blocks in the flowcharts and/or block diagrams, and the flow in the flowcharts and/or block diagrams can be implemented by computer program instructions. And/or a combination of boxes. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that, Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for switching a user equipment UE, characterized in that it comprises:

The source home evolved base station HeNB determines that the UE needs to handover to the target HeNB;

2. The method according to claim 1, wherein the source HeNB performs a handover procedure with the target HeNB through the X2 interface, including:

The source HeNB sends an X2 setup request X2 SETUP REQUEST message to the target HeNB through the X2 interface, where the message carries the closed user group CSG identifier ID of the source HeNB.

The method according to claim 1, wherein the source HeNB performs a handover procedure with the target HeNB through the X2 interface, including:

The source HeNB sends a handover request handover request message to the target HeNB through the X2 interface, where the message carries the UE member information element membership IE.

A UE handover method, comprising:

The method according to claim 4, wherein the target HeNB performs a handover procedure with the source HeNB through the X2 interface, including:

The target HeNB receives the X2 SETUP REQUEST message sent by the source HeNB through the X2 interface, where the X2 SETUP REQUEST message carries the CSG ID of the source HeNB;

The target HeNB sends an X2 setup response X2 SETUP RESPONSE message to the source HeNB, where the X2 SETUP RESPONSE message carries the CSG ID of the target HeNB.

The target HeNB receives the handover request message sent by the source HeNB through the X2 interface. The message carries the UE membership IE;

The method according to any one of claims 4 to 6, wherein the target HeNB performs a handover procedure with the source HeNB through the X2 interface, including:

The target HeNB sends a handover request acknowledgement handover request ack message to the source HeNB through the X2 interface.

8. A home evolved base station, comprising:

The home evolved base station according to claim 8, wherein the handover module is further configured to send, by using an X2 interface, an X2 SETUP REQUEST message to the target HeNB, where the message carries the CSG ID of the home evolved base station.

10. The home evolved base station according to claim 8, wherein the handover module is further configured to send a handover request message to the target HeNB through the X2 interface, where the message carries the UE membership IE.

11. A home evolved base station, comprising:

The switching module is configured to switch the UE after performing the handover procedure with the source HeNB through the X2 interface.

The home-based evolved base station according to claim 11, wherein the handover module is further configured to receive, by using an X2 interface, an X2 SETUP REQUEST message sent by the source HeNB, where the X2 SETUP REQUEST message carries a CSG ID of the source HeNB; And sending an X2 SETUP RESPONSE message to the source HeNB, where the X2 SETUP RESPONSE message carries the CSG ID of the family evolved base station.

13. The home evolved base station according to claim 11, wherein the switching module further comprises Steps are used to receive a handover request message sent by the source He B through the X2 interface, where the message carries the UE membership IE; and when determining that the home evolved base station is in the hybrid mode, according to the UE membership to the CSG member UE and the non CSG member UE Different admission control and rate control are performed.

The home evolved base station according to any one of claims 11 to 13, wherein the switching module is further configured to send a handover request ack message to the source HeNB through the X2 interface.