WO2014047928A1

WO2014047928A1 - Mobile network sharing method and device

Info

Publication number: WO2014047928A1
Application number: PCT/CN2012/082455
Authority: WO
Inventors: 张艳平; 朱奋勤; 吴晓波
Original assignee: 华为技术有限公司
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2014-04-03
Also published as: CN103843406B; CN103843406A

Abstract

The present invention relates to a mobile network sharing method. The method comprises: when a UE in an idle state moves from an LTE network to a GERAN sharing network, acquiring an old PLMN ID or old RAI of a PS domain when the UE is in the LTE network; choosing a PLMN corresponding to the old PLMN ID or old RAI to act as a PLMN of the PS domain of the GERAN network of the UE, with the PLMN of the PS domain being the same as a PLMN of a CS domain selected by the UE in the LTE network. The mobile network sharing method provided in the embodiments of the present invention can avoid the problem that a UE cannot acquire a normal service due to a PLMN of a PS domain of a service subscriber being different from a PLMN of a CS domain.

Description

Mobile network sharing method and device

Technical field

The present invention relates to the field of mobile communications, and in particular, to a mobile network sharing method and apparatus. Background technique

In the existing Long Term Evolution (LTE), when there are multiple Public Switching Mobile Networks (PLMNs) that are responsible for the circuit switching (CS) domain of voice data, the user equipment can be served ( In the case of the User Equipment (UE), the Mobility Management Entity (MME) selects the PLMN or operator of the CS domain serving the UE.

In the GSM EDGE Radio Access Network (GERAN) GERAN network, if there is a Gs interface, the Serving GPRS Support Node (SGSN) is selected by the General Packet Radio Service (GPRS). The PLMN of the CS domain; otherwise the Base Station Controller (BSC) selects the PLMN serving the UE. The existing standard specifies that the PL domain of the CS domain and the packet switch (PS) should be the same, otherwise the UE cannot perform services normally.

When the UE camps on the LTE, the UE initiates a joint tracking area update or attach procedure, and the MME selects

The PLMN or operator of the CS domain. When the UE moves from the LTE to the GERAN, the access network element may be different from the PLMN selected by the UE in the PS domain and the PLMN in the CS domain, so that the UE cannot obtain the normal service.

Since one PLMN can belong to only one carrier, one operator can include one or more PLMNs, where the CS domain of the same RAT and the PLMN of the PS domain are the same, and the PLMNs of different RATs may be different, such as the CS domain PLMN and PS domain of GERAN. PLMN is the same, but GERAN It is not necessarily the same as the PLMN of UTRAN and can be different. The present invention provides a method of ensuring that the PS domain of the serving UE and the CS domain PLMN or operator are the same. Summary of the invention

An object of the present invention is to provide a mobile network sharing method and apparatus to solve the prior art.

When the UE moves from the LTE network to the GERAN network, there is no guarantee that the PLMN or the carrier of the CS domain and the PS domain are consistent, and the UE cannot obtain normal service.

In an aspect, the embodiment of the present invention provides a mobile network sharing method, where the method includes: when a UE in an idle state moves from an LTE network to a GERAN shared network, acquires an old PLMN ID of the PS domain of the UE in the LTE network or Old RAI;

Selecting the PLMN corresponding to the old PLMN ID or the old RAI as the PLMN serving the PS domain of the GERAN network of the UE; the PLMN of the PS domain is the same as the CS domain PLMN selected by the UE when the LTE network is selected.

In a preferred embodiment of the present invention, the obtaining the old PLMN ID or the old RAI of the PS domain in the LTE network of the UE includes:

Receiving a message including an old PLMN ID or an old RAI sent by the mobility management network element to obtain an old PLMN ID or an old RAI.

In a preferred embodiment of the present invention, selecting the PLMN corresponding to the old PLMN ID or the old RAI as the PLMN of the PS domain serving the UE's GERAN network includes:

The PLMN ID or the PLMN selection policy corresponding to the RAI is configured locally in the access network element, and the corresponding PLMN selection policy is locally searched according to the old PLMN ID or the RAI ID of the UE, and the PLMN serving UE is selected.

On the other hand, an embodiment of the present invention provides a mobile network sharing method, where the method includes: receiving access request information of an idle state UE moving from an LTE network to a GERAN network; Obtaining the old RAI information or the old PLMN ID information of the UE according to the access request message;

Sending the old RAI or old PLMN ID information to the base station control area BSC, so that the BSC selects the PLMN corresponding to the old RAI or the old PLMN ID as the PLMN of the PS domain of the GERAN network serving the UE, where the PS domain The PLMN is the same as the PLMN of the CS domain in which the UE serves the UE at the time of the LTE.

In a preferred embodiment of the present invention, after the sending the old RAI or old PLMN ID information to the BSC, the method further includes:

Determining whether the UE is in the GERAN shared network, and sending the old RAI or old PLMN to the BSC if the UE is in the GERAN shared network.

Determining whether the UE moves from the LTE to the GERAN shared network, and if the UE moves from LTE to the GERAN shared network, sends the old RAI or old PLMN to the BSC.

In a preferred embodiment of the present invention, the determining whether the UE is a slave

The method for LTE to move to the GERAN shared network is:

It is known from the UE that the UE moves from LTE to GERAN, where the GERAN network is a shared network.

In a preferred embodiment of the present invention, the obtaining the old PLMN ID information of the UE according to the access request message is specifically:

Obtain the old RAI information in the access request information, and read the PLMN information from the old RAI as the old PLMN ID.

In a further aspect, the embodiment of the present invention provides a mobile network sharing method, where the method includes: receiving an access request information of a UE;

Obtaining or selecting a CS domain PLMN of the UE, and selecting an MME corresponding to the CS domain PLMN coding;

Transmitting global unique temporary user identification information to the UE, the globally unique temporary user identification information including the MME code, when the UE moves to the GERAN network, the NRI of the MME coded mapping is used by the BSC to select the GERAN serving the UE The PLMN of the PS domain of the network, in a preferred implementation manner of the embodiment of the present invention, the CS domain PLMN of the acquiring UE is specifically:

The UE's CS domain PLMN/carrier information is received from the mobile services switching center.

In a preferred embodiment of the present invention, the MME is encoded as an MME code including a PS domain NRI or a null NRI of the CS domain PLMN.

In a preferred embodiment of the present invention, when the PLMN deploys the SGSN pool or when multiple SGSNs can serve the UE, the MME code includes a null NRI.

In a further aspect, the embodiment of the present invention provides a mobile network sharing method, where the method includes: receiving a message that includes a UE access request message sent by a base station controller BSC;

Sending a message to the old mobility management network element MME of the serving UE, acquiring the CS domain PLMN ID of the CS receiving service UE of the UE,

Comparing the PL domain/carrier of the PLMN/operator with the serving UE, the PLMN/operator, if different, sends the CS domain PLMN ID to the BSC.

In a preferred embodiment of the present invention, comparing the CS domain PLMN/operator of the PLMN/operator with the serving UE, if the CS domain PLMN ID is sent to the BSC differently, the method further includes:

If the message including the UE access request message sent by the BSC does not include the IMSI, or the message including the UE access request message sent by the BSC includes a redirection attempt tag, the CS domain PLMN information is sent to BSC.

In a preferred embodiment of the embodiment of the present invention, the old mobile to the serving UE The MME sends a message to obtain the user context, which is specifically:

Acquiring the old RAI in the access request message, and acquiring the user context from the obtained old mobility management network element according to the old mobility management network element of the old RAI lookup service UE. In a further aspect, the embodiment of the present invention provides a mobile network sharing method, where the method includes: receiving a message of a UE including an access request message;

Sending a message including the access request message to the first mobility management network element;

Receiving CS domain PLMN ID information sent by the first mobility management network element;

Sending a message including a UE access request message to the second mobility management network element to make the service the same.

In a preferred embodiment of the present invention, the second mobility management network element corresponding to the CS domain PLMN is selected according to the CS domain PLMN ID, specifically:

Select service CS domain PLMN GPRS service support node SGSN, or;

Select Service CS Domain The SGSN of the carrier to which the PLMN belongs.

In a preferred embodiment of the present invention, the receiving, by the first mobility management network element, the CS domain PLMN ID information,

And receiving the CS domain PLMN ID information and the international mobile subscriber identity IMSI information sent by the first mobility management network element.

In a further aspect, the embodiment of the present invention further provides a mobile network sharing device, where the device includes: an acquiring unit, configured to acquire, when the UE in an idle state moves from the LTE network to the GERAN shared network, acquire the PS of the UE in the LTE network. Domain's old PLMN ID or old RAI;

a selecting unit, configured to select the PLMN corresponding to the old PLMN ID or the old RAI a PLMN serving a PS domain of a GERAN network of the UE; a PLMN of the PS domain and the

The CS domain PLMN selected by the UE when the LTE network is the same is the same.

In a further aspect, the embodiment of the present invention further provides a mobile network sharing apparatus, where the apparatus includes: a receiving unit, configured to receive access request information of an idle state UE that moves from an LTE network to a GERAN network;

An acquiring unit, configured to acquire old RAI information or old PLMN ID information of the UE according to the access request message;

Sending, by the sending unit, the old RAI or old PLMN ID information to the base station controller BSC, so that the BSC selects the PLMN corresponding to the old RAI or the old PLMN ID as the PLMN of the PS domain of the GERAN network serving the UE, The PLMN of the PS domain is the same as the PLMN of the CS domain of the UE serving the UE at the time of the LTE.

In a further aspect, the embodiment of the present invention further provides a mobile network sharing device, where the device includes: a receiving unit, configured to receive access request information of the UE;

An acquiring unit, configured to acquire or select a CS domain PLMN of the UE, and select an MME code corresponding to the CS domain PLMN;

a sending unit, configured to send global unique temporary user identification information to the UE, where the global unique temporary user identification information includes the MME code, and when the UE moves to the GERAN network, the NRI of the MME code mapping is used for the BSC selection service. The PLMN of the PS domain of the GERAN network of the UE, the PLMN of the PS domain is the same as the PLMN of the CS domain of the UE serving the UE in the LTE time.

In a further aspect, the embodiment of the present invention further provides a mobile network sharing apparatus, where the apparatus includes: a receiving unit, configured to receive a message that includes a UE access request message sent by a BSC; and a sending unit, configured to serve the old UE The mobility management network element MME sends a message to acquire a user context, where the context includes a CS domain PLMN ID of the UE serving the UE receiving the serving UE, The comparing unit compares the CS domain PLMN/operator of the PLMN/operator with the serving UE, and sends the CS domain PLMN ID to the BSC if different.

In a further aspect, the embodiment of the present invention further provides a mobile network sharing device, where the device includes: a first receiving unit, receiving an access request message of the UE;

The first sending unit forwards the message including the access request message to the first mobility management network element;

a second receiving unit, configured to receive a second mobility management network element of the CS domain PLMN ID information sent by the first mobility management network element;

The second sending unit sends a message including the UE access request message to the second mobility management network element, so that the PLMN of the PS domain is the same as the PLMN of the CS domain of the UE in the LTE time service UE.

In the mobile network sharing method provided by the embodiment of the present invention, the access network element selects the same as the CS domain old PLMN ID for the UE by acquiring the PS domain PLMN/operator corresponding to the CS domain old PLMN ID information. The PS domain PLMN/operator accesses, so that the PS domain selected by the BSC and the PLMN of the CS domain are different, so that the UE cannot obtain the normal service. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are merely the present invention. Some of the embodiments can be obtained by those skilled in the art from the drawings without any inventive labor.

FIG. 1 is an architectural diagram of a plurality of operators sharing a carrier core network; 2 is a diagram of a plurality of operators sharing a wireless network architecture;

3 is a flowchart of an embodiment of a mobile network sharing method according to an embodiment of the present invention;

4 is an interaction state diagram of a mobile network sharing method according to an embodiment of the present invention; FIG. 5 is an interaction state diagram of another embodiment of a mobile network sharing method according to an embodiment of the present invention; FIG. 6 is a mobile network sharing method according to an embodiment of the present invention; FIG. 7 is a structural diagram of another embodiment of a mobile network sharing apparatus according to an embodiment of the present invention;

FIG. 8 is a structural diagram of another embodiment of a mobile network sharing apparatus according to an embodiment of the present invention; FIG.

FIG. 9 is a structural diagram of an embodiment of a mobile network sharing apparatus according to an embodiment of the present invention;

FIG. 10 is a structural diagram of another embodiment of a mobile network sharing apparatus according to an embodiment of the present invention; FIG.

FIG. 11 is a structural diagram of another embodiment of a mobile network sharing apparatus according to an embodiment of the present invention. detailed description

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. Figure 1 shows the architecture of multiple operators sharing the core network of operators. Figure 2 shows the architecture of shared wireless networks by multiple operators. The UE supporting the network sharing selects the PLMN, and sends the selected PLMN to the BSC, and the BSC notifies the SGSN/MSC. For UEs that do not support network sharing, the BSC in the multi-operator core network MOCN attempts SGSN access of different PLMNs until successful or all SGSNs refuse access. In the Gateway Core Network (GWCN), the PLMN of the service is determined by the SGSN/MSC.

In the GERAN network sharing, for a UE that does not support network sharing, the network needs to ensure that the PLMN/operator of the PS domain of the serving user and the PLMN/operator of the CS domain of the serving user are the same. If there is a Gs interface, the SGSN needs to select the MSC. The operator is consistent with himself. If the Gs interface does not exist, the BSC reads the Network Resource Identifier (NRI) in the Temporary Logical Link Identifier (TLLI) for the initially accessed UE. If the NRI is not valid, the BSR is used. CS/PS coordination process guarantees CS domain and PS The domain operator is consistent. If the NRI is valid, the PLMN is determined according to the relationship between the NRI and the local NRI and the PLMN, and the corresponding SGSN is selected to send a message to the SGSN.

The NRI of the present invention is effective, and refers to the value of NRI in the TLLI and the list of locally configured NRIs. The NRI is included in the TLLI encoding. In other implementations, all PLMNs in the current service area form a pool, and the NRI belongs to the pool, and the NRI is valid at this time.

The CS/PS coordination process sends the user's initial message to one of the multiple SGSNs of the SGSN, and includes a redirection attempt flag, which receives the initial mobile subscriber identification number (IMSI). Sending a message including a redirection command flag to the BSC/RNC, including the cause value "CS/PS coordination"; the BSC reselects the SGSN according to the IMSI, and sends the initial message of the user to the selected The SGSN, which is sent to the SGSN, also includes the IMSI of the user.

To this end, the embodiment of the present invention is to configure the same selected PLMN policy as the PLMN to which the MME belongs on the BSC; when the user moves from the LTE to the GERAN, the BSC obtains the PLMN to which the MME of the serving UE belongs or the routing area identification of the user (Route Area Identification) , RAI), determining the PS domain PLMN serving the UE according to the PLMN selection policy of the PLMN or the RAI to which the MME belongs. Or, when the MME code is deployed, the MME code corresponding to the PLMN/operator of the CS domain is configured, and the MME code is mapped to the upper eight bits of the NRI field in the TLLI. In the MOCN scenario, the BSC reads the NRI and selects the NRI. The PLMN thus determines which PLMN is serving the user, thereby ensuring that the PS domain selected by the BSC is the same as the PLMN of the CS domain.

FIG. 3 is a flowchart of an embodiment of a mobile network sharing method according to an embodiment of the present invention. The embodiment provides a method provided by an embodiment of the present invention from a base station controller BSC side as an access network element. It can be seen from the figure that the method includes:

Step 301: When the UE in the idle state moves from the LTE network to the GERAN shared network, Obtaining the old PLMN ID or old RAI of the PS domain of the UE in the LTE network;

Specifically, after the UE moves from the LTE network to the GERAN shared network, the CS domain service and the PS domain service are acquired by using the shared network. In this embodiment, the UE first accesses LTE, acquires a CS service through a PLMN, and then moves to the GERAN shared network to issue an access request to obtain a PS domain service.

When the UE accesses the LTE to acquire the CS domain service and multiple PLMNs can provide the CS domain service, the MME selects the PLMN of the CS domain according to the policy configured by the operator. The policy configured by the operator may be a unified selected CS domain PLMN policy configured by the MME to which the MME belongs, or may be a MME-specific CS domain PLMN selection policy. When the UE moves to the GERAN, the GUMMEI (Global Unique MME Identifier) is mapped to the RAI, so the PLMN to which the MME belongs or the PLMN selection policy unique to the MME can be locally configured in the BSC. When the BSC and the PLMN of multiple MMEs or multiple MMEs have communication requirements, a PLMN selection policy of multiple PLMNs or multiple MMEs may be configured on the BSC. When the UE accesses, the BSC obtains the old PLMN or the old RAI (that is, GUMMEI) accessed by the UE, searches for the local policy configuration of the BSC, and obtains the corresponding PLMN selection policy. It is to be noted that the PLMN selection policy of the CS domain is configured on the MME, and the PLMN selection policy is configured on the BSC to ensure that the MME, the CS domain selected by the BSC, and the PLMN of the PS domain are the same.

After obtaining the corresponding PLMN, the access request is forwarded to the acquired mobile management network element (SGSN) of the PS domain PLMN/operator, so as to ensure that the PS domain PLMN of the serving UE and the PLMN of the CS domain are the same.

In this embodiment, by configuring the same PLMN selection policy as the MME in the base station controller BSC as the access network element, the access network element selects the same PS domain PLMN/operator as the CS domain old PLMN ID for the UE. The access is performed to avoid the problem that the PS domain selected by the BSC is different from the PLMN of the CS domain, so that the UE cannot obtain the normal service.

4 is an interaction state reference of an embodiment of a mobile network sharing method provided by the present invention. Figure, as can be seen from the figure, the method includes:

Step S401: The BSC allocates a radio resource to the UE, and receives a message sent by the UE, where the message includes a NAS message sent to the mobility management network element.

Specifically, in the GERAN network, the access network element is a BSC or a BSS, and the UE that does not support network sharing in the present invention refers to not supporting the GERAN network shared UE.

Step S402, the BSC sends the access request information of the UE to the mobility management network element.

Specifically, the message sent by the BSC to the mobility management network element is an access request message sent by the UE to the mobility management network element, and the access request message may include an old RAI, where the access request is first sent to the BSC, and then The BSC forwards the mobility management network element.

Since the BSC does not know which PLMN can serve the UE, the BSC randomly selects a mobility management network element to forward the user's access request, and the BSC includes the Redirect Attempt Flag in the message and sends it to the mobility management network. In this embodiment, it is assumed that the user prefers to send to the mobility management network element SGSN1.

It should be noted that, in this embodiment, the user's access request (also referred to as NAS request, non access stratum non-access stratum request) may include, but is not limited to, an Attach request attach request and a RAU request routing area update request. The access request rejection (also referred to as NAS reject, non access stratum) message may include, but is not limited to, attach reject attachment rejection, RAU reject routing area update rejection. The access request is accepted (also referred to as NAS accpet, non-access layer acceptance), and may include, but is not limited to, attach accept attachment acceptance, RAU accept routing area update acceptance. In this embodiment, only attach attachment is taken as an example for description.

The redirected attempt flag message included in the GERAN is the uplink base station subsystem and the GPRS protocol message.

Step S403, the mobility management network element acquires the old RAL in the access request message, and obtains the identifier information of the old PLMN indicating the UE, where the PLMN refers to the old PLMN information serving the PS domain. Specifically, the SGSN1 searches for the old mobility management network element that served the UE according to the old RAI, and acquires the user IMSI information from the old mobility management network element.

If the acquisition fails or the UE is initially accessing the network, the mobility management network element acquires the user IMSI information from the UE.

The mobility management network element may read the old PLMN information from the old RAI, determine that the UE is a roaming user according to the IMSI, and the old PLMN is a PLMN of the LTE network that has a usage protocol with the CS domain; Step S404, the mobility management network element The BSC sends a redirect indication message, where the message includes old PLMN or old RAI information;

The optional SGSN may determine that the UE is in the shared network to send the old PLMN or the old RAI, and vice versa;

Whether the UE is in the shared network can be implemented by the operator in the SGSN. For example, if the BSC configured by the UE is shared by multiple operators, the UE is in the shared network.

Optionally, the SGSN may determine that the UE moves from LTE to GERAN before sending the old PLMN or old RAI, and vice versa.

The UE moves from the LTE to the GERAN, and can be carried by the UE in the access request message.

"P-TMSI type" is known as "GUTI".

Specifically, the redirection indication message includes a redirection indicaiton message, and the rejection reason value in the message is CS/PS coordination.

Step S405, the BSC determines the PLMN of the serving UE according to the old RAI or old PLMN and the local configuration data.

Specifically, the selection policy of the PLMN corresponding to the LTE PLMN or the RAI is configured on the BSC, and the selection policy is consistent with the policy configured on the MME of the old PLMN. Old PLMN chooses PLMN

PLMN1 PLMN A

PLMN2, 3 PLMN B

PLMN4 PLMN C

Table 1

The old PLMN and the PLMN in the selection policy may be a one-to-one relationship or a many-to-one relationship as shown in Table 1.

Table 2

The old RAI and the PLMN in the selection policy may be one-to-one or many-to-one relationships as shown in Table 2.

Step S406: The BSC sends an access request message to the mobility management network element corresponding to the selection policy. Specifically, the SGSN2 may be an SGSN different from the SGSN1, or may be the SGSN1. After that, if the SGSN2 rejects the UE access, it sends a message including the reject UE access message to the access network element, and the access network element forwards the reject UE access message to the UE.

With the foregoing embodiment, the PLMN selection policy of multiple PLMN/RAIs is configured in the BSC, and the BSC obtains the PLMN corresponding to the MME or the Old RAI corresponding to the MME to find the PLMN selection policy corresponding to the old RAI/PLMN, and determines the PS domain PLMN. Avoid the situation that the UE cannot obtain the service due to the inconsistency between the PLMN and the PS domain in the CS domain, and improve the user experience.

FIG. 5 is an interaction state reference diagram of another embodiment of a mobile network sharing method according to an embodiment of the present invention.

Step S501: The UE sends a combined attach/tracking area update request (combined TAU request) message to the mobility management network element. Step S502: After receiving the message, the MME obtains the CS domain PLMN/operator, and selects the mobility management network element code (MME Code, MMEC) corresponding to the CS domain PLMN or the operator. Specifically, the method of acquiring the CS domain PLMN/operator may have The following methods: First, the MME selects the CS domain PLMN/operator serving the UE;

Second, in the MOCN scenario, the MME sends a location update request message to the MSC, and the PLMN to which the MSC accepting the update request belongs is the CS domain PLMN/operator;

Third, in the GWCN scenario, the MME sends an access request message to the MSC, and the MSC selects the CS domain PLMN/operator and notifies the MME;

The above three modes are by way of example only, and the invention is not limited.

The MMEC corresponding to the CS domain PLMN/operator refers to an MMEC including an NRI or a null NRI corresponding to the PLMN, or an MMEC including a PS domain NRI or a null NRI of the CS domain PLMN, and the NRI in the present embodiment is capable of An identifier of a PLMN or an operator (operator) of a PS domain is identified, and its specific form of representation is not limited.

More specifically, when there are multiple CS domain PLMNs/operators that can serve one MME, each PLMN/operator of the CS domain has an NRI different from other PLMNs, and the operator can configure multiple MME coding, each MME code includes an NRI of the above PLMN/operator; when the PLMN/operator (PS) PS domain NRI code is different from the NRI of the CS domain, the MME code should include the NRI of the PS domain. . For example, when the NRI of the PLMN/operator1 CS domain is 1, and the NRI of the PS domain of the PLMN/operator1 is 2, the MMEC includes an NRI value of 2.

In addition, when the PLMN/operator of the shared network has an MSC/Visitor Location Register, VLR or SGSN pool, the MMEC includes the null-NRI of the PLMN/operator (operator); when the PLMN/ When the null-NRI of the operator CS domain and the PS domain are different, the MMEC includes the null-NRI of the PLMN/operator (operator) PS domain.

When there are multiple CS domain PLMNs serving one MME, the MME will have multiple MMECs. Therefore, the MME selects the MMEC corresponding to the NRI of the CS domain PLMN. For example, the NRI or null-NRI corresponding to the CS domain serving the MME is 1, 2, 3; the binary codes are 00, 10, 11 respectively; The coding in the MMEC can be as shown in Table 3:

table 3

In this embodiment, the value of the "x" is 0, and the value of the NRI is determined. The location of the NRI is determined by the location of the NRI in the GERAN/UTRAN. This embodiment is only taken as an example of placing the lowest two digits. According to the standard, the MMEC is mapped to the 23rd to 16th bits of the P-TMSI. According to the embodiment, the access network element reads 16-17 bits as the NRI, wherein the access network element reads the bits in the P-TMSI as The NRI is configured by the operator.

However, the location of the NRI in the MMEC is not limited, and may be at the lowest 2 bits or the middle 2 bits, and so on. If the operator configures the location of the read NRI to be 23-22 bits, the MMEC code should be as shown in Table 4.

Table 4

In step S504, the MME sends the GUTI information to the UE, and includes the MMEC in the GUTI information. Specifically, after acquiring the MMEC corresponding to the CS domain PLMN/operator of the UE, the MME sends the global unique temporary identifier ID information GUIT to the UE, in the GUIT. Contains MMEC.

Step S505, the UE sends information including a network resource identifier to the access network element. Specifically, after receiving the GUTI, the UE reads the MMEC information therein, and acquires the network resource identifier NRI.

When the UE moves to the GERAN network, the UE maps the GUTI to TLLI, where the MMEC maps to the fields of 23-16 in the TLLI. Send an NRI to the access NE. For example, in the GERAN network, the TLLI is sent to the BSC. Some bits in the TLLI encoding, for example, 23-18 are NRI codes, and the BSC reads the NRI in the TLLI, and selects the corresponding SGSN to forward the UE's access request message according to the NRI. In TLLI coding, the specific location of the NRI is configured by the operator in the BSC.

Step S506: The access network element forwards the access request message of the UE to the target mobility management network element. Specifically, the access network element acquires the NRI after receiving the NRI-containing information sent by the UE, for example, the TLLI.

In the GERAN network, the TLLI is sent to the BSC. Some bits in the TLLI coding, for example, 23-16 are NRI codes, and the BSC reads the NRI in the TLLI, and selects the corresponding SGSN to forward the UE's access request message according to the NRI. In TLLI coding, the specific location of the NRI is configured by the operator in the BSC.

The NMR-encoded MMEC corresponding to the CS domain PLMN is sent to the UE by using the method in this embodiment. When the UE moves to the GERAN, the PLMN of the serving UE may be determined according to the NRI, and the selected PS domain PLMN and the CS domain selected by the MME are guaranteed. Zhizhi. Avoid the situation that the UE cannot obtain the service due to the inconsistency between the PLMN and the PS domain in the CS domain, and improve the user experience.

FIG. 6 is an interaction state reference diagram of another embodiment of a mobile network sharing method according to an embodiment of the present invention.

Step S601: The process of the network sharing between the UE and the BSC is not supported, the BSC allocates the radio resource to the UE, and the UE sends a message to the BSC, where the message includes the NAS message sent to the first mobility management network element;

Step S602, since the network is a shared network, the UE does not support network sharing, and does not provide the selected PLMN. To the BSC, the BSC selects the mobility management network element SGSN to send the access request message of the UE according to a local policy, such as a random selection. In this step, the network element selected by the BSC is the first SGSN, and the UE sends the UE access to the first SGSN. Request information; at the same time, the BSC may include a Redirect Attempt Flag in the message to the first SGSN.

Specifically, the UE sends an access request message to the first SGSN, where the access request message may include an old RAI, and the access request is first sent to the BSC.

It should be noted that, in this embodiment, the user's access request (also referred to as NAS request, non access stratum non-access stratum request) may include, but is not limited to, an Attach request attach request and a RAU request routing area update request. The access request rejection (also referred to as NAS reject, non access stratum) message may include, but is not limited to, attach reject attachment rejection, RAU reject routing area update rejection. The access request is accepted (also referred to as NAS accept, non-access layer acceptance), and may include, but is not limited to, attach accept attachment acceptance, and RAU accept routing area update acceptance. In this embodiment, only attach attachment is taken as an example for description.

The message including the redirect attempt flag in the GERAN is the uplink base station subsystem and the GPRS protocol (Uplink BSSGP Unidata) message.

Step S603: The first SGSN acquires the old RAL in the access request message according to the old RAI user context information, including the CS domain PLMN ID of the serving UE. The CS domain PLMN is saved by the MME, and may be when the MME accesses the UE. The MME is selected and sent to the MME through the SGs interface, which is not limited by the present invention.

Step S604, the first SGSN determines that if the PLMN to which the MME belongs is different from the CS domain, the message is sent to the BSC; the information may be a redirection indication message, where the redirection indication message includes a redirection indication ) The news. The optional SGSN may determine that the UE is in the shared network to send the CS domain PLMN ID, and vice versa;

The optional SGSN may determine that the message sent by the BSC does not include IMSI or includes a redirect attempt flag to send the CS domain PLMN ID.

Optionally, the SGSN may determine that the UE sends the CS domain PLMN information when the UE moves from the LTE to the GERAN, and vice versa.

The UE moves from the LTE to the GERAN, and the UE can learn that the "P-TMSI type" is "GUTI" in the access request message.

Step S605: The BSC acquires the CS domain PLMN of the serving UE, and selects the second SGSN corresponding to the PLMN to ensure that the CS domain PLMN and the PS domain PLMN are the same.

In the case that the same operator has multiple PLMNs, the BSC may select the SGSN of the same operator as the CS domain PLMN according to the local carrier, for example, the CS domain PLMN is PLMN1, belonging to operatorl. The operatorl deploys PLMN1, PLMN2, and the BSC can also select the SGSN of the PLMN2 to serve the UE. If there is no SGSN and BSC interconnection of the same PLMN/Operator, the BSC may select an SGSN as the second mobility management network element according to the IMSI hash algorithm. It should be specially noted that when a UE accesses the CS domain in a certain step in the future, the BSC can still select an MSC according to the same IMSI hash algorithm to ensure that the selected MSC is the same as the selected SGSN PLMN.

Step S606: The BSC sends a message including a user access request message to the selected second SGSN, where the message includes the IMSI of the UE, and the message may not include a redirect attempt flag;

Step S607: The second SGSN receives the message sent by the BSC, and searches for the old mobility management network element MME to obtain the user context information according to the old RAI in the access request message. On the user The CS domain PLMN ID of the serving UE is included in the following information.

After receiving the message, if the CS domain PLMN ID and the second mobility management network element belong to different PLMN IDs but the message sent by the BSC includes the IMSI or does not include the redirection attempt label, the CS domain PLMN ID is not sent to the BSC. Otherwise send the CS domain PLMN ID to the BSC.

With the above embodiment, when the UE moves from LTE to GERAN, the MME will serve the UE.

The CS domain PLMN ID is sent to the target mobility management network element (ie, the first and second mobility management network elements in this embodiment). When the target mobility management network element PLMN and the CS domain PLMN are different, the target mobility management is performed. The network element sends the BSC sent by the CS domain PLMN, and the BSC selects the corresponding SGSN according to the CS domain PLMN. Ensure that the PLMN to which the SGSN belongs and the PLMN in the CS domain improve the user experience.

Correspondingly, the embodiment of the present invention further provides a mobile network sharing device, where the mobile network sharing device can be a BSC, and the device can refer to FIG. 7, including:

The acquiring unit 701 is configured to: when the UE in the idle state moves from the LTE network to the GERAN shared network, obtain an old PLMN ID or an old RAI of the PS domain of the UE in the LTE network;

The selecting unit 702 is configured to select the PLMN corresponding to the old PLMN ID or the old RAI as the PLMN of the PS domain of the GERAN network serving the UE; the PLMN and the obtaining unit 701 of the PS domain is specifically configured to: move to the first mobile The SGSN1 forwards the access request message, and the SGSN1 obtains the CS domain old RAI identifier information of the UE according to the access request message, and obtains the identifier information of the old PLMN ID of the CS domain of the UE. ;

And receiving the redirection indication information sent by the mobility management entity, where the indication information includes the identifier information of the old PLMN ID of the CS domain of the UE;

And searching, according to the identification information of the old PLMN ID of the CS domain of the UE, a PS domain PLMN corresponding to the identity information of the old PLMN ID of the CS domain of the UE.

The mobile network sharing device stores a locally configured PLMN second selection policy, and the selection The selection policy is consistent with the first selection policy configured on the mobility management entity of the old PLMN ID of the CS domain of the UE;

The obtaining unit 701 selects a corresponding PS domain PLMN in the locally selected second selection policy according to the identification information of the old PLMN ID of the CS domain.

As shown in FIG. 8, the embodiment of the present invention further provides a mobile network sharing device, where the mobile network sharing device may be an SGSN, and the device includes:

The receiving unit 801 is configured to receive access request information of an idle state UE that moves from the LTE network to the GERAN network;

An obtaining unit 802, configured to acquire old RAI information or old PLMN ID information of the UE according to the access request message;

The sending unit 803, sending the old RAI or old PLMN ID information to the BSC, where the access network element selects the PLMN corresponding to the old RAI or the old PLMN ID as the PLMN of the PS domain of the GERAN network serving the UE, The PLMN of the PS domain is the same as the PLMN of the CS domain of the UE serving the UE at the time of the LTE.

With the foregoing embodiment, the PLMN selection policy of multiple PLMN/RAIs is configured in the BSC, and the BSC obtains the PLMN corresponding to the MME to which the MME belongs or the Old RAI corresponding to the MME to find the PLMN selection policy corresponding to the old RAI/PLMN, and determines the PS domain PLMN. It is avoided that the UE cannot obtain the service due to the inconsistency between the CS domain PLMN and the PS domain PLMN, thereby improving the user experience. As shown in FIG. 9, the embodiment of the present invention further provides a mobile network sharing device. In this embodiment, the mobile network sharing device is a mobility management entity MME, and the device includes: The receiving unit 901 is configured to receive access request information of the UE.

The obtaining unit 902 is configured to acquire or select a CS domain PLMN of the UE, and select an MME code corresponding to the CS domain PLMN.

The sending unit 903 is configured to send global unique temporary user identification information to the UE, where the global unique temporary user identification information includes the MME code, and when the UE moves to the GERAN network, the NRI of the MME coded mapping is used for BSC selection. The PLMN serving the PS domain of the GERAN network of the UE, the PS domain PLMN and the CS domain PLMN being the same.

The MMEC of the NRI code corresponding to the CS domain PLMN is sent to the UE by the mobile network sharing device of the embodiment. When the UE moves to the GERAN, the PLMN of the serving UE may be determined according to the NRI, and the selected PS domain PLMN and the MME are selected. CS domain PLMN. It is avoided that the UE cannot obtain the service due to the inconsistency between the PLMN and the PS domain in the CS domain, thereby improving the user experience.

Correspondingly, the embodiment of the present invention further provides a mobile network sharing device, where the mobile network sharing device may be an SGSN, and the device may refer to FIG. 10, and includes:

The receiving unit 1001 is configured to receive a message that includes a UE access request message sent by the BSC, and obtain a user context, where the CS includes a CS domain PLMN ID of the CS of the serving UE.

The comparing unit 1003 compares the CS domain PLMN/operator of the PLMN/operator with the serving UE, and sends the CS domain PLMN ID to the BSC if different.

The processing unit 1004, if the CS domain PLMN ID is sent to the BSC differently, if the same, the UE is allowed to access.

With the foregoing embodiment, when the UE moves from the LTE to the GERAN, the MME sends the CS domain PLMN ID of the serving UE to the target mobility management network element (that is, the first and second mobility management network elements in this embodiment). When the target mobility management network element PLMN and the CS domain PLMN are different, the target shift The dynamic management network element selects the BSC sent by the CS domain PLMN, and the BSC selects the corresponding SGSN according to the CS domain PLMN. The PLMN and the CS domain PLMN to which the SGSN belongs are guaranteed to improve the user experience.

Correspondingly, the embodiment of the present invention further provides a mobile network sharing device, where the mobile network sharing device can be a BSC, and the device can refer to FIG. 11 and includes:

The first receiving unit 1101 receives an access request message of the UE.

The first sending unit 1102 forwards, to the first mobility management network element, a message that includes the access request message;

a second receiving unit 1103, configured to receive CS domain PLMN ID information sent by the first mobility management network element, and a corresponding second mobility management network element;

The second sending unit 1105 sends a message including the UE access request message to the second mobility management network element, so that the PS domain of the serving UE is the same as the CS domain PLMN or operator.

The foregoing apparatus is only a virtual apparatus for implementing the above method, and each unit is only a functional unit divided for method steps, and those skilled in the art should understand that, in order to implement the corresponding method, each unit may be integrated in the same processor, or The implementation by hardware is not to be construed as limiting the invention.

A person skilled in the art should further appreciate that it is described in connection with the embodiments disclosed herein. The example units and algorithm steps can be implemented in electronic hardware, computer software, or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the examples have been generally described in terms of function in the above description. Composition and steps. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

The above described embodiments of the present invention are further described in detail, and the embodiments of the present invention are intended to be illustrative only. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

claims

1. A mobile network sharing method, characterized in that the method includes:

When the user equipment UE in the idle state moves from the LTE network to the GERAN shared network, it obtains the old PLMN ID or old RAI of the PS domain when the UE is in the LTE network;

Select the PLMN corresponding to the old PLMN ID or old RAI as the PLMN of the PS domain of the GERAN network serving the UE, and the PLMN of the PS domain is the same as the CS domain PLMN selected by the UE when it is in the LTE network.

2. The mobile network sharing method according to claim 1, wherein the obtaining the old PLMN ID or old RAI of the PS domain of the UE in the LTE network specifically includes:

Receive a message including the old PLMN ID or old RAI sent by the mobility management network element to obtain the old PLMN ID or old RAI.

3. The mobile network sharing method according to claim 2, wherein selecting the PLMN corresponding to the old PLMN ID or old RAI as the PLMN of the PS domain of the GERAN network serving the UE includes:

Configure the PLMN selection policy corresponding to the PLMN ID or RAI locally on the access network element. According to the old PLMN ID or RAI ID of the UE, the corresponding PLMN selection policy is searched locally and the PLMN is selected to serve the UE.

4. A mobile network sharing method, characterized in that the method includes:

Receive the access request information of the idle UE that moves from the LTE network to the GERAN network; obtain the old RAI information or old PLMN ID information of the UE according to the access request message;

Send the old RAI or old PLMN ID information to the base station controller BSC, so that the BSC selects the PLMN corresponding to the old RAI or old PLMN ID as the PLMN of the PS domain of the GERAN network serving the UE, and the PS domain The PLMN is the same as the PLMN serving the CS domain of the UE when the UE is in the LTE.

5. The mobile network sharing method according to claim 4, wherein after sending the old RAI or old PLMN ID information to the BSC, the method further includes:

Determine whether the UE is in the GERAN shared network. If the UE is in the GERAN shared network, send the old RAI or old PLMN to the BSC.

6. The mobile network sharing method according to claim 4, wherein after sending the old RAI or old PLMN ID information to the BSC, the method further includes:

Determine whether the UE moves from LTE to the GERAN shared network. If the UE moves from LTE to the GERAN shared network, send the old RAI or old PLMN to the BSC.

7. The mobile network sharing method according to claim 6, wherein the method for determining whether the UE has moved from LTE to the GERAN shared network is:

It is learned from the UE that the UE moves from LTE to GERAN, where the GERAN network is a shared network.

8. The mobile network sharing method according to claim 4, wherein the obtaining the old PLMN ID information of the UE based on the access request message is specifically:

9. A mobile network sharing method, characterized in that the method includes:

Receive the UE’s access request information;

Obtain or select the CS domain PLMN of the UE, and select the MME code corresponding to the CS domain PLMN;

Send globally unique temporary user identification information to the UE. The globally unique temporary user identification information includes the MME code. When the UE moves to the GERAN network, the NRI mapped by the MME code is used by the BSC to select the GERAN that serves the UE. PLMN of the PS domain of the network, so

10. The mobile network sharing method according to claim 9, characterized in that: the obtaining UE The CS domain PLMN is specifically:

Receive the UE's CS domain PLMN/operator information from the mobile services switching center.

11. The mobile network sharing method according to claim 9, wherein the MME code is an MME code including PS domain NRI or null NRI of the CS domain PLMN.

12. The mobile network sharing method according to any one of claims 6-8, characterized in that when the PLMN deploys an SGSN pool or when multiple SGSNs can serve the UE, the MME encoding includes null NRL

13. A mobile network sharing method, characterized in that the method includes:

Receive a message including a UE access request message sent by the base station controller BSC;

Send a message to the old mobility management network element MME serving the UE to obtain the UE's CS receiving service and the UE's CS domain PLMN ID;

Compare the PLMN/operator to which it belongs and the CS domain PLMN/operator serving the UE, and if they are different, send the CS domain PLMN ID to the BSC.

14. The mobile network sharing method according to claim 13, characterized in that, comparing the PLMN/operator to which it belongs and the CS domain PLMN/operator serving the UE, if they are different, the CS domain PLMN

ID sent to BSC, also includes:

If the message including the UE access request message sent by the BSC does not include the IMSI, or the message including the UE access request message sent by the BSC includes a redirection attempt tag, then the CS domain PLMN information is sent to BSC.

15. The mobile network sharing method according to claim 13, characterized in that: the service

The UE's old mobility management network element MME sends a message to obtain the user context, specifically:

Obtain the old RAI in the access request message, search for the old mobility management network element serving the UE according to the old RAI, and obtain the user context from the obtained old mobility management network element.

16. A mobile network sharing method, characterized in that the method includes:

Receive a message from the UE including an access request message; Send a message including the access request message to the first mobility management network element; Receive the CS domain PLMN ID information sent by the first mobility management network element; Manage the network element;

Send a message including a UE access request message to the second mobility management network element to make services the same.

17. The mobile network sharing method according to claim 16, wherein the second mobility management network element corresponding to the CS domain PLMN is selected according to the CS domain PLMN ID, specifically:

Select service CS domain PLMN GPRS service support node SGSN, or;

Select service CS domain SGSN of the operator to which the PLMN belongs.

18. The method according to claim 16, characterized in that: receiving the CS domain PLMN ID information sent by the first mobility management network element, further comprising:

Receive CS domain PLMN ID information and International Mobile Subscriber Identity IMSI information sent by the first mobility management network element.

19. A mobile network sharing device, characterized in that the device includes:

The acquisition unit is used to obtain the old PLMN ID or old RAI of the PS domain of the UE in the LTE network when the UE in the idle state moves from the LTE network to the GERAN shared network;

A selection unit configured to select the PLMN corresponding to the old PLMN ID or old RAI as the PLMN of the PS domain of the GERAN network serving the UE; the PLMN of the PS domain and the CS selected when the UE is in the LTE network The domain PLMN is the same.

20. A mobile network sharing device, characterized in that the device includes:

A receiving unit, configured to receive access request information from an idle UE that moves from the LTE network to the GERAN network; An acquisition unit, configured to acquire the old RAI information or old PLMN ID information of the UE according to the access request message;

The sending unit sends the old RAI or old PLMN ID information to the base station controller BSC, so that the BSC selects the PLMN corresponding to the old RAI or old PLMN ID as the PLMN of the PS domain of the GERAN network serving the UE, The PLMN of the PS domain is the same as the PLMN of the CS domain that serves the UE when the UE is in the LTE.

21. A mobile network sharing device, characterized in that the device includes:

A receiving unit, configured to receive the access request information of the UE;

The acquisition unit is used to acquire or select the CS domain PLMN of the UE, and select the MME code corresponding to the CS domain PLMN;

A sending unit, configured to send globally unique temporary user identification information to the UE. The globally unique temporary user identification information includes the MME code. When the UE moves to the GERAN network, the NRI mapped by the MME code is used for BSC selection services. The PLMN of the PS domain of the GERAN network of the UE is the same as the PLMN of the CS domain that serves the UE when the UE is in the LTE.

22. A mobile network sharing device, characterized by:

The receiving unit is used to receive the message including the UE access request message sent by the BSC; the sending unit is used to send a message to the old mobility management network element MME serving the UE to obtain the user context, and the context includes the CS serving the UE. Receive the CS domain PLMN ID of the serving UE,

The comparison unit compares the PLMN/operator to which it belongs and the CS domain PLMN/operator serving the UE, and sends the CS domain PLMN ID to the BSC if they are different.

23. A mobile network sharing method, characterized in that the method includes:

The first receiving unit receives the access request message of the UE;

The first sending unit forwards the message including the access request message to the first mobility management network element. interest;

The second receiving unit is used to receive the CS domain PLMN ID information sent by the first mobility management network element; the second mobility management network element;

The second sending unit sends a message including a UE access request message to the second mobility management network element, so that the PLMN of the PS domain is the same as the PLMN of the CS domain that serves the UE when the UE is in the LTE.