WO2017177676A1

WO2017177676A1 - Method and device for accessing core network in multi-operator core network

Info

Publication number: WO2017177676A1
Application number: PCT/CN2016/106001
Authority: WO
Inventors: 曹怡晋
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-04-12
Filing date: 2016-11-16
Publication date: 2017-10-19
Also published as: CN107295601B; CN107295601A

Abstract

The embodiment of the present invention provides a method and device for accessing a core network in a multi-operator core network. The method comprises: determining a public land mobile network (PLMN) of a first core network to be connected; and establishing an S1 connection with the first core network according to the PLMN of the first core network. The embodiment of the present invention can access a core network in a multi-operator core network.

Description

Method and device for accessing core network in multi-operator core network

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and apparatus for accessing a core network in a multi-operator core network.

Background technique

Network sharing in long term evolution (LTE) means that different operators can share devices and resources in the network. The multi-operator core network (MOCN, Muli-Operator Core Network) is a way of network sharing, as shown in Figure 1, that is, different operators (for example, operator 1, operator 2, and carrier 3 in Figure 1) The devices and resources on the wireless side (for example, the base station in FIG. 1) are shared, wherein S1 in FIG. 1 refers to an S1 connection.

There are two ways for the wireless side to perform network sharing, one is dedicated carrier sharing, and the other is shared carrier sharing. The dedicated carrier sharing is that the operator shares the wireless side base station (eNB) device, but does not share the wireless carrier, that is, different cells within one eNB are separately provided to different operators for independent use. The shared carrier sharing means that the operator not only shares the wireless side eNB equipment but also shares the wireless carrier, that is, different cells within one eNB can be provided to different operators for simultaneous use.

Summary of the invention

The purpose of the embodiments of the present invention is to provide a method and device for accessing a core network in a multi-operator core network, which is used to implement core network access in a multi-operator core network.

In order to achieve the above objective, an embodiment of the present invention provides a method for accessing a core network in a multi-operator core network, including:

Determining a service public land mobile network PLMN of the first core network to be connected;

Establishing an S1 connection with the first core network according to the serving PLMN of the first core network.

The step of determining the serving public land mobile network PLMN of the first core network to be connected includes:

The service PLMN of the first core network is obtained from the configuration information of each core network stored in advance.

Sending a first S1 connection establishment request message to the first core network, where the PLMN in the global identity of the base station of the first base station is an evolved cell global identifier ECGI of any cell in the first base station, PLMN in;

Receiving a first S1 connection establishment response message returned by the first core network, where the first S1 connection establishment response message carries the service PLMN of the first core network;

The serving PLMN of the first core network is extracted from the first S1 connection setup response message.

Wherein, according to the serving PLMN of the first core network, establishing a step of connecting with the S1 of the first core network Before, the method also includes:

Determining whether the serving PLMN of the first core network is the same as the PLMN in the global identity of the base station of the first base station carried in the first S1 connection establishment request message;

If the serving PLMN of the first core network is different from the PLMN in the global identifier of the base station of the first base station that is carried in the first S1 connection establishment request message, perform the establishment of the first core network according to the serving PLMN of the first core network. Step of the S1 connection;

If the serving PLMN of the first core network is the same as the PLMN in the global identity of the base station of the first base station carried in the first S1 connection establishment request message, the process ends.

The step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network includes:

Sending a second S1 connection establishment request message to the first core network, and receiving a second S1 connection establishment response message returned by the first core network, where the second S1 connection establishment request message is carried in the global identifier of the base station of the first base station The PLMN is the serving PLMN of the first core network.

After the step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network, the method further includes:

When the terminal switches from the first cell in the first base station to the second cell in the target base station, acquiring the first PLMN in the ECGI of the second cell in the target base station;

And determining, according to the first PLMN and the serving PLMN of each first core network connected by the first base station, the second PLMN in the global identifier of the base station of the target base station.

The step of determining the second PLMN in the global identifier of the base station of the target base station according to the first PLMN and the serving PLMN of each first core network connected by the first base station includes:

Determining whether there is a service PLMN that is the same as the first PLMN in the serving PLMN of each first core network;

If the serving PLMN of each first core network has the same serving PLMN as the first PLMN, the first PLMN is used as the second PLMN in the base station global identifier of the target base station;

If the service PLMN of the first core network does not have the same service PLMN as the first PLMN, send a request message to the first core network, so that the first core network according to the global identity of the base station of the target base station carried in the request message, The request message is routed to the target base station, and the PLMN in the global identifier of the base station of the target base station carried in the request message is the serving PLMN of the first core network;

Receiving a response message returned by the first core network that successfully routes the request message to the target base station, and using any one of the received response messages, the service PLMN carried in the corresponding request message, as the base station of the target base station globally The second PLMN in the identity.

An embodiment of the present invention further provides an apparatus for accessing a core network in a multi-operator core network, including:

a first determining module, configured to determine a serving public land mobile network PLMN of the first core network to be connected;

And a establishing module, configured to establish an S1 connection with the first core network according to the serving PLMN of the first core network.

The first determining module includes:

The first obtaining unit is configured to acquire the serving PLMN of the first core network from the configuration information of each core network stored in advance.

The first determining module includes:

a first sending unit, configured to send a first S1 connection setup request message to the first core network, where the PLMN in the global identifier of the base station of the first base station is any cell in the first base station PLMN in the evolved cell global identifier ECGI;

a first receiving unit, configured to receive a first S1 connection establishment response message returned by the first core network, where the first S1 connection establishment response message carries the service PLMN of the first core network;

And a lifting unit, configured to extract the serving PLMN of the first core network from the first S1 connection establishment response message.

Wherein, the device further comprises:

a judging module, configured to determine whether the serving PLMN of the first core network is the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message, and if the serving PLMN of the first core network, If the PLMN in the global identifier of the base station of the first base station that is carried in the S1 connection setup request message is different, the triggering setup module performs the step of establishing a connection with the first core network according to the serving PLMN of the first core network, and if The serving PLMN of the first core network is the same as the PLMN in the global identity of the base station of the first base station carried in the first S1 connection establishment request message, and the process ends.

Among them, the building module includes:

The establishing unit is configured to send a second S1 connection establishment request message to the first core network, and receive a second S1 connection establishment response message returned by the first core network, where the second S1 connection establishment request message is carried in the first base station The PLMN in the global identity of the base station is the serving PLMN of the first core network.

Wherein, the device further comprises:

An acquiring module, configured to acquire, when the terminal switches from the first cell in the first base station to the second cell in the target base station, the first PLMN in the ECGI of the second cell in the target base station;

And a second determining module, configured to determine, according to the first PLMN and the serving PLMN of each first core network that is connected by the first base station, the second PLMN in the global identifier of the base station of the target base station.

The second determining module includes:

a determining unit, configured to determine whether there is a service PLMN that is the same as the first PLMN in the serving PLMN of each first core network, and if the same serving PLMN as the first PLMN exists in the serving PLMN of each first core network, triggering determination a unit, and if the same serving PLMN as the first PLMN does not exist in the serving PLMN of each first core network, triggering the second sending unit;

a determining unit, configured to use, according to the triggering of the determining unit, the first PLMN as the second PLMN in the global identifier of the base station of the target base station;

The second sending unit is configured to send a request message to the first core network according to the triggering of the determining unit, so that the first core network routes the request message to the target base station according to the global identifier of the base station of the target base station carried in the request message, and the request message is The PLMN in the global identity of the base station of the target base station carried in is the service of the first core network PLMN;

a second receiving unit, configured to receive a response message returned by the first core network that successfully routes the request message to the target base station, and send any one of the received response messages to the serving PLMN carried in the corresponding request message. And as the second PLMN in the global identity of the base station of the target base station.

The above aspects of the present invention include at least the following beneficial effects:

In an embodiment of the present invention, by determining a serving PLMN of a first core network to be connected, and establishing an S1 connection with the first core network according to a serving PLMN of the first core network, the multi-operator core network is implemented. Core network access.

DRAWINGS

FIG. 1 is a schematic diagram of a network description of a multi-operator core network;

Figure 2 is a schematic diagram of the X2 self-establishment process;

3 is a flowchart of a method for accessing a core network in a multi-operator core network according to a first embodiment of the present invention;

4 is a schematic flowchart of establishing an S1 connection between a first base station and a first core network according to the first embodiment of the present invention;

FIG. 5 is a second schematic flowchart of establishing an S1 connection between a first base station and a first core network according to the first embodiment of the present invention;

6 is a schematic diagram of a network connection in a first application example in the first embodiment of the present invention;

7 is a schematic diagram of a network connection in a second application example and a third application example in the first embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an apparatus for accessing a core network in a multi-operator core network according to a second embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

In the LTE system, a Public Land Mobile Network (PLMN) identity is used to distinguish different operators. The eNB global identity (Global eNB ID) is used to identify a single base station, and an E-UTRAN Cell Global Identifier (ECGI) is used to identify a unique cell.

In the TS 36.300 protocol, 36.300 defines the Global eNB ID and E-UTRAN Cell Global Identifier as follows:

Evolved cell global identifier: used to globally identify a cell. It consists of a PLMN+Cell Identity. According to the 36.331 protocol, the PLMN in the evolved cell global identifier is the first PLMN in the cell broadcast message (SIB1) (E-UTRAN Cell Global Identifier (ECGI): used to identify cells globally. The ECGI is constructed from the PLMN identity The cell belongs to and the Cell Identity (CI) of the cell.The included PLMN is the one given by the first PLMN entry in SIB1,corcording to TS36.331).

Base station identity: identifies a base station in a PLMN. The base station global identifier is included in the Cell Identity in the ECGI (eNB Identifier (eNB ID): used to identify eNBs within a PLMN. The eNB ID is contained within the CI of its cells). The Cell Identity is composed of a Global eNB ID+Cell ID.

Base station global identifier: used to globally identify a base station. The base station global identity is composed of a PLMN+eNB identifier (eNB Identifier). The country code (MCC) and the mobile network code (MNC) of the mobile subscriber in the PLMN are the same as the MCC and the MNC in the corresponding ECGI (Global eNB ID: used to identify eNBs globally. The Global eNB ID is constructed from the PLMN identity) The eNB belongs to and the eNB ID. The MCC and MNC are the same as included in the E-UTRAN Cell Global Identifier (ECGI)).

From the above, the PLMN in the ECGI is the first PLMN broadcasted by the cell, and the PLMN used by the Global eNB ID is the PLMN used by the ECGI. In the shared carrier sharing mode, if the first PLMN of each cell is different, the PLMN used in the Global eNB ID cannot be determined. Similarly, in the dedicated carrier mode, the PLMNs of the respective cells are different from each other, and Global cannot be determined. All PLMNs in the eNB ID. This is a standard defect, and there is no PLMN in the protocol that defines the Global eNB ID.

This standard defect affects the use of functions such as switching and X2 self-establishment. For example, for the X2 self-establishment function, as shown in FIG. 2, the process of acquiring the X2 configuration information of the target base station in the X2 self-establishment process is:

(1) The source side eNB 1 transmits a base station configuration transmission (Enb_CONFIGURATION_TRANSFER) request message to the mobility management entity (MME), and the SON information IE in the signaling includes the eNB ID of the source (eNB 1) and the target (eNB 2).

(2) After receiving the Enb_CONFIGURATION_TRANSFER request from the source side, the MME performs routing according to the target eNB ID and transparently transmits the request message to the target side through the MME configuration transmission (MME_CONFIGURATION_TRANSFER).

(3) The target side (eNB 2) sends a response to the MME through the Enb_CONFIGURATION_TRANSFER response message, which carries the transmission address of the base station.

(4) The MME informs the source side of the transmission address of the target base station by using the MME_CONFIGURATION_TRANSFER response message.

When the source base station receives the ECGI measurement report of the terminal (UE), it uses the PLMN+eNB ID in the ECGI as the eNB ID of the target base station to send an Enb_CONFIGURATION_TRANSFER request message to the core network, but if the target base station actually uses the Global eNB ID at this time. The PLMN in the PEMN is different from the PLMN in the ECGI. That is, the source base station sends the target station eNB ID different from the Global eNB ID actually used by the target base station, and the core network cannot be routed to the target base station through the target eNB ID, so that the X2 self-establishment function cannot be completed.

A possible solution to the above problem is to add a configuration of the primary PLMN in the parameter configuration, that is, the PLMN in the Global eNB ID of the base station in all the shared networks uses the primary PLMN configured in the background, and the PLMN and the background configuration in the cell ECGI. When the main PLMN is different, when the X2 self-establishment, switching, etc. are triggered, it will be from ECGI. The PLMN in the obtained PLMN+eNB ID is replaced with the primary PLMN configured in the background, thereby ensuring the correctness of the X2 self-establishment, handover, and the like.

However, the above solution can only solve the problem of PLMN selection in the base station Global eNB ID in the shared network, and the problem still exists in the shared network and the non-shared network intersection area. For example, the source base station in the shared network share receives the ECGI of a non-shared network cell. If the PLMN in the ECGI is different from the primary PLMN configured in the background, the source base station uses the primary PLMN+eNB ID as the Global eNB ID of the target base station, but because The target base station is a non-shared network, and the PLMN of the Global eNB ID is the same as the PLMN in the cell ECGI, so that the Global eNB ID determined by the source base station in the network sharing is different from the Global eNB ID actually used by the target base station in the non-network sharing. Therefore, the core network cannot be correctly routed to the target base station, causing the X2 self-establishment, handover, and other functions to fail. Similarly, if the source base station is in a non-shared network and the target base station is in a shared network, the problem still exists. The following embodiments of the present invention are based on the problem, and provide a method and an apparatus for accessing a core network in a multi-operator core network. In the embodiment of the present invention, a PLMN in a Global eNB ID used by a base station is connected to a core corresponding to S1. The PLMNs of the network are consistent, that is, for different core networks, the PLMNs in the Global eNB IDs used by the base stations are different, so that the above-mentioned problems of X2 self-establishment, handover, and the like failing can be avoided.

The various embodiments are specifically described below.

First embodiment

As shown in FIG. 3, a first embodiment of the present invention provides a method for accessing a core network in a multi-operator core network, where the method includes:

Step 301: Determine a serving PLMN of the first core network to be connected.

Step 302: Establish an S1 connection with the first core network according to the serving PLMN of the first core network.

In the first embodiment of the present invention, the above step 301 includes two implementations.

The first implementation manner of the step 301 is implemented by adding configuration information of each core network, where the service PLMN of the first core network is obtained from the configuration information of each core network stored in advance. Specifically, configuration information of each core network corresponding to the S1 connection may be added to the network management parameter configuration of the first base station. As shown in Table 1, the configuration information of each core network includes: an S1 coupling identifier (such as 1, 2, 3 in Table 1), and a name of the core network (such as the core network 1 and the core network in Table 1). 2. Core network 3) and PLMN configuration (such as PLMN1, PLMN2, PLMN3 in Table 1), wherein PLMN1 represents the serving PLMN of the core network 1, PLMN2 represents the serving PLMN of the core network 2, and PLMN3 represents the serving PLMN of the core network 3. 1 denotes the S1 coupling identifier of the

core network

1, 2 denotes the S1 coupling identifier of the core network 2, and 3 denotes the S1 coupling identifier of the core network 3.

S1偶联标识S1 coupling mark	核心网Core Network		PLMN配置PLMN configuration
11	核心网1 Core network 1	PLMN1 PLMN1
22	核心网2 Core network 2	PLMN2PLMN2
33	核心网3Core network 3	PLMN3PLMN3

Table 1

Correspondingly, when the implementation manner of step 301 is the first implementation manner described above, as shown in FIG. 4, step 302 has The method includes: the first base station sends a second S1 connection establishment request message to the first core network, and receives a second S1 connection establishment response message returned by the first core network. The PLMN in the global identifier of the base station of the first base station is the serving PLMN of the first core network, which is carried in the second S1 connection establishment request message. It should be noted that, when a core network change corresponding to an S1 connection or a service PLMN of the core network changes, the configuration information of each core network needs to be modified, and then the corresponding Global eNB ID is updated through the S1 connection establishment process.

As shown in FIG. 5, the second implementation manner of the step 301 is implemented by using the S1 connection establishment method. Specifically, the first base station first sends a first S1 connection establishment request message to the first core network, where the first S1 connection is established. The PLMN in the global identifier of the base station of the first base station is the PLMN in the evolved cell global identifier (ECGI) of any cell in the first base station, and then receives the first S1 connection established by the first core network. In response to the message, the first S1 connection setup response message carries the serving PLMN of the first core network, and finally extracts the serving PLMN of the first core network from the first S1 connection setup response message.

It should be noted that, when the implementation manner of the step 301 is the second implementation manner, before the step 302 is performed, the method further includes: determining whether the serving PLMN of the first core network is connected to the first S1 to establish a request message. The PLMN in the global identity of the base station of the first base station is the same, and if the serving PLMN of the first core network is the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message, the process ends. If the serving PLMN of the first core network is different from the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message, the above step 302 is performed.

As shown in FIG. 5, when the implementation manner of the step 301 is the foregoing second implementation manner, the foregoing step 302 includes: the first base station sends a second S1 connection establishment request message to the first core network, and receives the first core. The second S1 connection establishment response message returned by the network. The PLMN in the global identifier of the base station of the first base station is the serving PLMN of the first core network, which is carried in the second S1 connection establishment request message. It should be noted that when the serving PLMN of the first core network connected by the first base station is changed, the first base station is notified by the “core network configuration update message”, and the first base station finds the service of the first core network. When the PLMN changes, the new serving PLMN is used as the PLMN in the Global eNB ID, and the S1 connection establishment process is re-initiated to the first core network. The notification of the change of the serving PLMN of the first core network of the first base station by the "core network configuration update message" is a common knowledge for those skilled in the art, and therefore, no further explanation is provided herein.

In the first embodiment of the present invention, the first base station determines an outgoing PLMN of the first core network to be connected, and establishes an S1 connection with the first core network according to the serving PLMN of the first core network, that is, The PLMN in the Global eNB ID used by the first base station is the same as the PL1 in the first core network, that is, the PLMN in the Global eNB ID used by the first base station is different for different first core networks, thereby implementing a multi-operator core. Core network access in the network.

It should be noted that, in the MOCN network sharing mode, the foregoing first base station may be a base station in a shared network, or may be a base station in a cross-region of a shared network and a non-shared network.

In the first embodiment of the present invention, after performing the foregoing step 302, the method further includes: when the terminal switches from the first cell in the first base station to the second cell in the target base station, acquiring the target base. Second small in the station The first PLMN in the ECGI of the area, and determining the second PLMN in the global identity of the base station of the target base station according to the first PLMN and the serving PLMN of each first core network connected by the first base station.

In the first embodiment of the present invention, the first core network connected by the first base station may be one or more.

In the first embodiment of the present invention, the step of determining the second PLMN in the global identifier of the base station of the target base station according to the serving PLMN of each first core network connected by the first PLMN and the first base station specifically includes the following step:

In the first step, it is determined whether there is a service PLMN that is the same as the first PLMN in the serving PLMN of each first core network. If the service PLMN of the first core network has the same service PLMN as the first PLMN, the second step is performed. If the same serving PLMN as the first PLMN does not exist in the serving PLMN of each first core network, the third step is performed.

In the second step, the first PLMN is used as the second PLMN in the global identity of the base station of the target base station.

In the third step, the request message is sent to the first core network, so that the first core network routes the request message to the target base station according to the global identity of the base station of the target base station carried in the request message. The PLMN in the global identifier of the base station of the target base station carried in the request message is the serving PLMN of the first core network.

The request message refers to standard information of a global identity of a base station with a target base station, for example, a base station configuration transmission message in an X2 self-establishment function.

It should be noted that, if the first core network connected to the first base station is multiple, the first base station needs to send the request message to each first core network, and the base station global identifier of the target base station carried in the request message The PLMN is a serving PLMN corresponding to the first core network.

In the fourth step, the response message sent by the first core network that successfully routes the request message to the target base station is received, and any one of the received response messages and the service PLMN carried in the corresponding request message are targeted. The second PLMN in the base station global identity of the base station.

Preferably, in order to increase the rate of X2 self-establishment, handover, and the like, the serving PLMN carried in the request message corresponding to the received first response message may be used as the second PLMN in the global identifier of the base station of the target base station.

In the first embodiment of the present invention, in the MOCN network sharing mode, whether it is a base station in a shared network (for example, the first base station described above), or a base station in a shared area of a shared network and a non-shared network (for example, the first base station described above) The PLMN in the global identity of the base station of the target base station (for example, the second PLMN described above) may be determined according to the PLMN in the ECGI of the cell in the target base station (for example, the second cell) and the serving PLMN of each core network connected to the base station. In order to avoid the failure of X2 self-establishment, switching and other functions, to ensure the correctness of X2 self-establishment, switching and other functions.

In the first embodiment of the invention, the above method is further illustrated in three specific application examples.

The first application example is an instance of the S1 handover function in the MOCN shared carrier network (whose network connection is as shown in FIG. 6). The PLMN in the Global eNB ID used by the base station (the following base station 1 and the base station 2) is the same as the service PLMN of the S1 connection corresponding to the core network, and is implemented by adding configuration information of each core network.

The first step is to set the service PLMN of the core network 1 to 46001, and the service PLMN of the core network 2 to 46002. Base The cell 1 and cell 2 are arranged on the station 1, the PLMN of the cell 1 is set to 46001 and 46002, the PLMN in the ECGI of the cell 1 is 46001, the PLMN of the cell 2 is 46001 and 46002, and the PLMN in the ECGI of the cell 2 is 46001. The cell 3 is configured with the cell 3, the PLMN of the cell 3 is 46001 and 46002, and the PLMN of the cell 3 of the cell 3 is 46002.

Step 2: Configure configuration information of each core network on the base station 1 and the base station 2, respectively. The configuration information of each core network is shown in Table 2. 46001 in Table 2 represents the serving PLMN of the core network 1, 46002 represents the serving PLMN of the

core network

2, 1 represents the S1 coupled identifier of the

core network

1, and 2 represents the core network. 2 S1 coupled marker.

S1偶联标识S1 coupling mark	核心网 Core Network		PLMNPLMN
11	核心网1 Core network 1	4600146001
22	核心网2 Core network 2	4600246002

Table 2

The third step: the base station 1 initiates an S1 connection establishment with the core network 1 and the core network 2, respectively, and the base station 2 also initiates an S1 connection establishment with the core network 1 and the core network 2, respectively. The PLMN of the Global eNB ID band in the S1 connection establishment request of the base station 1 and the base station 2 to the core network 1 is 46001, and the PLMN of the Global eNB ID band in the S1 connection establishment request of the base station 1 and the base station 2 to the core network 2 Both are 46002.

The fourth step is to connect the user terminal to the cell 3 and gradually move to the overlapping area of the cell 3 and the cell 2, and trigger the terminal to report the handover measurement report of the cell 2.

Step 5: After receiving the handover measurement report of the terminal, the cell 3 obtains the Global eNB ID from the ECGI of the cell 2, and the corresponding PLMN is 46001.

Step 6: The base station 2 determines that the PLMN of the core network connected thereto has 46001 and 46002, and includes the PLMN obtained from the ECGI of the cell 2 in the fifth step, and selects 46001 as the PLMN in the Global eNB ID of the base station 1.

Step 7: The base station 2 initiates a handover request message to the core network 1, which carries the Global eNB ID of the base station 1, wherein the PLMN is 46001. The core network 1 can be routed to the base station 1 according to the Global eNB ID of 46001, and transmits a handover request message to the base station 1.

Step 8: After receiving the handover request message, the base station 1 performs a handover response and sends it to the base station 2 through the core network 1.

Step 9: The base station 2 sends a handover indication to the terminal, and the terminal switches from cell3 to cell2.

The second application example is an example of the S1 handover function in the MOCN dedicated carrier network (whose network connection is as shown in FIG. 7). The PLMN in the Global eNB ID used by the base station (the following base station 1 and the base station 2) is the same as the service PLMN of the S1 connection corresponding to the core network, and is implemented by adding configuration information of each core network.

The first step is to set the service PLMN of the core network 1 to 46001, and the service PLMN of the core network 2 to 46002. Cell1 and cell2 are arranged on the base station 1, and the PLMN of the cell1 is set to 46001, the PLMN in the ECGI of the cell1 is 46001, the PLMN of the cell2 is 46002, and the PLMN in the ECGI of the cell 2 is 46002. Cell 3 is configured on the base station 2, the PLMN of the cell 3 is set to 46002, and the PLMN of the ECGI of the cell 3 is 46002.

Step 2: Configure configuration information of each core network on the base station 1 and the base station 2, respectively. The configuration information of each core network is shown in Table 3. 46001 in Table 3 represents the service PLMN of the core network 1, and 46002 represents the service of the core network 2. PLMN, 1 represents the S1 coupled identifier of the

core network

1, and 2 represents the S1 coupled identifier of the core network 2.

S1偶联IDS1 coupled ID	核心网 Core Network		PLMNPLMN
11	核心网1 Core network 1	4600146001
22	核心网2 Core network 2	4600246002

table 3

The third step: the base station 1 initiates an S1 connection establishment with the core network 1 and the core network 2, respectively, and the base station 2 also initiates an S1 connection establishment with the core network 1 and the core network 2, respectively. The PLMN of the Global eNB ID band in the S1 connection establishment request of the base station 1 and the base station 2 to the core network 1 is 46001, and the PLMN of the Global eNB ID band in the S1 connection establishment request of the base station 1 and the base station 2 to the core network 2 It is 46002.

The fourth step is to connect the user terminal to the cell 3 and gradually move to the overlapping area of the cell 3 and the cell 1.

Step 5: After receiving the handover measurement report of the terminal, cell3 obtains the Global eNB ID from the ECGI of cell1, and the corresponding PLMN is 46001.

Step 6: The base station 2 determines that the PLMN of the core network connected thereto is only 46002, and does not include the PLMN 46001 obtained from the ECGI of the cell 1 in the fifth step, and the base station 2 selects 46002 as the PLMN in the Global eNB ID of the base station 1.

Step 7: The base station 2 initiates a handover request message to the core network 2, where the Global eNB ID of the base station 1 is carried, wherein the PLMN is 46002. The core network 2 can route to the base station 1 according to the Global eNB ID of 46002, and send a handover request message to the base station 1.

Step 8: After receiving the handover request message, the base station 1 performs a handover response and sends it to the base station 2 through the core network 2.

Step 9: The base station 2 sends a handover indication to the terminal, and the terminal switches from cell3 to cell1.

The third application example is: the non-shared carrier network and the shared carrier network coexist under the MOCN (the network connection is as shown in FIG. 7), and the X2 self-established instance. The PLMN in the Global eNB ID used by the base station (the following base station 1 and the base station 2) is the same as the service PLMN corresponding to the S1 connection corresponding to the core network, and is implemented by the S1 connection establishment method.

The first step is to set the service PLMN of the core network 1 to 46001, and the service PLMN of the core network 2 to 46002. The base station 1 is a shared carrier base station, the base station 2 is a non-shared carrier base station, and there is no X2 connection between the base station 1 and the base station 2.

Step 2: Configure cell1 and cell2 on the base station 1, set the PLMN of cell1 to 46001 and 46002, the PLMN in the ECGI of cell1 to 46001, the PLMN of cell2 to 46001 and 46002, and the PLMN in the ECGI of cell2 to 46001. Cell 3 is configured on the base station 2, and the PLMN of the cell 3 is set to 46002, and the PLMN of the ECGI of the cell 3 is 46002.

The third step: the base station 1 establishes an S1 connection with the core network 1, and uses the 46001 as the Global eNB ID to initiate an S1 connection establishment request. When the core network 1 replies to the S1 connection response, it determines that the serving PLMN of the core network 1 is 46001, and the connection request with the S1. The PLMN in the same is the same, and the S1 connection establishment process ends.

The fourth step: the base station 1 establishes an S1 connection with the core network 2, and uses the 46001 as the Global eNB ID to initiate an S1 connection establishment request. When the core network 2 replies to the S1 connection response, it determines that the serving PLMN of the core network 2 is 46002, and The PLMN in the S1 connection request is different. Then, the base station 1 transmits the S1 connection request again, and uses 46002 as the PLMN in the Global eNB ID, and the core network 2 replies to the S1 connection response.

Step 5: The base station 2 establishes an S1 connection with the core network 2, and uses the 46002 as the Global eNB ID to initiate an S1 connection establishment request. When the core network 2 replies to the S1 connection response, it determines that the serving PLMN of the core network 2 is 46002, and the connection request with the S1. The PLMN in the same is the same, and the S1 connection establishment process ends.

Step 6: The user terminal is connected to the cell 3, and gradually moves to the overlapping area of the cell 3 and the cell 2, and triggers the handover measurement report reported by the cell 2.

Step 7: After receiving the handover measurement report of the terminal, cell3 finds that there is no X2 connection between the base station 1 and the base station 2, and then needs to initiate the X2 self-establishment process.

Step 8: Cell3 obtains the ECGI of the cell2 cell from the handover measurement report, and obtains the Global eNB ID from the ECGI, and the corresponding PLMN is 46001.

Step 9: The base station 2 determines that the PLMN of the core network connected thereto is only 46002, and does not include the PLMN 46001 acquired from the ECGI of the cell 2 in the eighth step, and the base station 2 selects 46002 as the PLMN in the Global eNB ID of the base station 1.

The eNB sends a MME configuration update message to the core network 2, where Give base station 1.

The eleventh step: after receiving the MME configuration update message, the base station 1 feeds back the base station configuration update message to the core network 2, and the core network 2 sends the MME configuration update message to the base station 2.

Step 12: The base station 2 completes the X2 self-establishment process according to the information of the base station 1 acquired in the eleventh step.

Second embodiment

As shown in FIG. 8, the second embodiment of the present invention provides an apparatus for accessing a core network in a multi-operator core network, including:

a first determining module 801, configured to determine a serving public land mobile network PLMN of the first core network to be connected;

The establishing module 802 is configured to establish an S1 connection with the first core network according to the serving PLMN of the first core network.

The first determining module 801 includes:

Wherein, the device further comprises:

a judging module, configured to determine whether the serving PLMN of the first core network is the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message, and if the serving core PLMN of the first core network, If the PLMN in the global identity of the base station of the first base station that is carried in the S1 connection setup request message is different, the triggering setup module 802 performs the step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network, and If the serving PLMN of the first core network is the same as the PLMN in the global identity of the base station of the first base station carried in the first S1 connection establishment request message, the process ends.

The establishing module 802 includes:

Wherein, the device further comprises:

The second determining module includes:

The second sending unit is configured to send a request message to the first core network according to the triggering of the determining unit, so that the first core network routes the request message to the target base station according to the global identifier of the base station of the target base station carried in the request message, and the request message is The PLMN in the global identifier of the base station of the target base station carried in the network base station is the serving PLMN of the first core network;

In the second embodiment of the present invention, by determining the serving PLMN of the first core network to be connected, and establishing an S1 connection with the first core network according to the serving PLMN of the first core network, that is, the first base station is equivalent to The PLMN in the used Global eNB ID is the same as the SMN connection in the first core network, that is, the PLMN in the Global eNB ID used by the first base station is different for different first core networks, thereby implementing the multi-operator core network. Core network access.

It should be noted that, the apparatus for accessing the core network in the multi-operator core network provided by the second embodiment of the present invention is a device for applying the method for accessing the core network in the multi-operator core network, that is, all the embodiments of the foregoing method Suitable for the device And can achieve the same or similar benefits.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should also be considered as the scope of protection of the present invention.

Industrial applicability

The present invention is applicable to the field of wireless communication technologies, and is used to implement core network access in a multi-operator core network.

Claims

A method for accessing a core network in a multi-operator core network includes:

Determining a service public land mobile network PLMN of the first core network to be connected; and

Establishing an S1 connection with the first core network according to the serving PLMN of the first core network.
The method of claim 1 wherein said step of determining a serving public land mobile network PLMN of the first core network to be connected comprises:

The service PLMN of the first core network is obtained from the configuration information of each core network stored in advance.
The method of claim 1 wherein said step of determining a serving public land mobile network PLMN of the first core network to be connected comprises:

And sending, by the first core network, a first S1 connection establishment request message, where the PLMN in the global identifier of the base station of the first base station is any cell in the first base station, The PLMN in the evolved cell global identifier ECGI;

Receiving a first S1 connection establishment response message returned by the first core network, where the first S1 connection establishment response message carries a service PLMN of the first core network;

Extracting the serving PLMN of the first core network from the first S1 connection setup response message.
The method of claim 3, wherein before the step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network, the method further comprises:

Determining whether the serving PLMN of the first core network is the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message;

Performing the service according to the first core network if the serving PLMN of the first core network is different from the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message a PLMN, establishing a step of connecting to the S1 of the first core network;

If the serving PLMN of the first core network is the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message, the process ends.
The method of claim 1, wherein the step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network comprises:

Sending a second S1 connection setup request message to the first core network, and receiving a second S1 connection setup response message returned by the first core network, where the first base station is carried in the second S1 connection setup request message The PLMN in the global identity of the base station is the serving PLMN of the first core network.
The method of claim 1, wherein after the step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network, the method further comprises:

When the terminal switches from the first cell in the first base station to the second cell in the target base station, acquiring the first PLMN in the ECGI of the second cell in the target base station;

Determining, according to the first PLMN and the serving PLMN of each first core network connected by the first base station The second PLMN in the global identity of the base station of the target base station.
The method of claim 6, wherein the determining, according to the first PLMN and the serving PLMN of each first core network to which the first base station is connected, determining the second PLMN of the base station global identifier of the target base station Steps, including:

Determining whether there is a service PLMN that is the same as the first PLMN in the serving PLMN of each first core network;

If the serving PLMN of each first core network has the same serving PLMN as the first PLMN, the first PLMN is used as the second PLMN in the base station global identifier of the target base station;

And if the service PLMN of the first core network does not have the same service PLMN as the first PLMN, sending a request message to the first core network, so that the first core network is carried according to the request message. a base station global identifier of the target base station, the request message is routed to the target base station, and the PLMN in the global identifier of the base station of the target base station carried in the request message is the serving PLMN of the first core network;

Receiving a response message returned by the first core network that successfully routes the request message to the target base station, and using any one of the received response messages, the service PLMN carried in the corresponding request message, as a target The second PLMN in the base station global identity of the base station.
A device for accessing a core network in a multi-operator core network, comprising:

a first determining module, configured to determine a serving public land mobile network PLMN of the first core network to be connected; and

And establishing a module, configured to establish an S1 connection with the first core network according to the serving PLMN of the first core network.
The apparatus of claim 8 wherein said first determining module comprises:

The first obtaining unit is configured to acquire the serving PLMN of the first core network from the configuration information of each core network stored in advance.
The apparatus of claim 8 wherein said first determining module comprises:

a first sending unit, configured to send a first S1 connection establishment request message to the first core network, where the first S1 connection establishment request message is carried, and the PLMN in the global identifier of the base station of the first base station is the a PLMN in an evolved cell global identifier ECGI of any cell in a base station;

The first receiving unit is configured to receive the first S1 connection establishment response message returned by the first core network, where the first S1 connection establishment response message carries the service PLMN of the first core network;

And the lifting unit is configured to extract the serving PLMN of the first core network from the first S1 connection establishment response message.
The device of claim 10, wherein the device further comprises:

The determining module is configured to determine whether the serving PLMN of the first core network is the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message, and if the first core network The serving PLMN, the base station of the first base station carried in the first S1 connection setup request message If the PLMNs in the identifier are different, triggering the establishing module to perform a step of establishing an S1 connection with the first core network according to the serving PLMN of the first core network, and if the serving PLMN of the first core network And ending with the same as the PLMN in the global identifier of the base station of the first base station carried in the first S1 connection establishment request message.
The apparatus of claim 8 wherein said establishing module comprises:

The establishing unit is configured to send a second S1 connection establishment request message to the first core network, and receive a second S1 connection establishment response message returned by the first core network, where the second S1 connection establishment request message is carried The PLMN in the global identity of the base station of the first base station is the serving PLMN of the first core network.
The device of claim 8 wherein said device further comprises:

The acquiring module is configured to acquire, when the terminal switches from the first cell in the first base station to the second cell in the target base station, the first PLMN in the ECGI of the second cell in the target base station;

The second determining module is configured to determine, according to the first PLMN and the serving PLMN of each first core network connected by the first base station, a second PLMN in the global identifier of the base station of the target base station.
The apparatus of claim 13 wherein said second determining module comprises:

The determining unit is configured to determine whether there is a service PLMN that is the same as the first PLMN in the serving PLMN of each first core network, and if there is a service PLMN that is the same as the first PLMN in the serving PLMN of each first core network a triggering determining unit, and triggering a second sending unit if the same serving PLMN as the first PLMN does not exist in the serving PLMN of each first core network;

a determining unit, configured to use, according to the triggering of the determining unit, the first PLMN as a second PLMN in a global identifier of a base station of the target base station;

The second sending unit is configured to send a request message to the first core network according to the triggering of the determining unit, so that the first core network according to the global identifier of the base station of the target base station carried in the request message The request message is routed to the target base station, and the PLMN in the global identifier of the base station of the target base station carried in the request message is the serving PLMN of the first core network;

a second receiving unit, configured to receive a response message returned by the first core network that successfully routes the request message to the target base station, and send any one of the received response messages to the corresponding request message. The carried PLMN is the second PLMN in the global identity of the base station of the target base station.