CN107182061B

CN107182061B - Communication connection method and device

Info

Publication number: CN107182061B
Application number: CN201710448576.8A
Authority: CN
Inventors: 周明宇; 路杨
Original assignee: Beijing Bai Caibang Technology Co ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2017-06-14
Filing date: 2017-06-14
Publication date: 2020-07-28
Anticipated expiration: 2037-06-14
Also published as: CN107182061A

Abstract

The embodiment of the invention provides a communication connection method and a communication connection device. The communication connection method comprises the following steps: broadcasting at least one first network identifier, wherein the at least one first network identifier is a network identifier of a Radio Access Network (RAN) network, each first network identifier corresponds to at least one second network identifier, and the second network identifiers are network identifiers of a core network; when a network access request of User Equipment (UE) is received, determining a second network identifier of a core network serving the UE according to network identifier information in the network access request; and accessing the UE to the core network serving the UE according to the second network identification of the core network serving the UE so that the UE can communicate with the core network serving the UE. In the embodiment of the invention, the base station broadcasts the network identification of the RAN network, and one RAN network can correspond to a plurality of core networks, so that more than 6 core network operators can share the same carrier wave, the sharing capability of a wireless access network is improved, and the hardware improvement of UE is not needed.

Description

Communication connection method and device

[ technical field ] A method for producing a semiconductor device

The present invention relates to the field of communications technologies, and in particular, to a communication connection method and apparatus.

[ background of the invention ]

When the two or more operators share the same carrier, the base station may notify Mobile Network IDs of multiple operators, that is, P L MN (Public L and Mobile Network) ID, in a broadcast message SIB1(System Information Block), the ue (User Equipment) receives a broadcast message SIB1 sent by the base station, performs Network selection according to the P L MN ID in the broadcast message, and reports the P L MN ID of the selected Network to the base station.

In the prior art, the network ID broadcasted by the base station is the network ID of the core network operator, and the selected service network reported to the base station by the UE on the air interface is consistent with the service network reported to the MME by the base station, the increase of the number of P L MN IDs in the broadcast message increases the complexity of selecting the network by the UE, increases the power consumption of the UE and improves the requirement on the processing capability of the UE.

With the issuance of more and more virtual operator license plates and the increasing influx of more internet content providers to the mobile internet, the demand for radio access network sharing is increasing and operators sharing the same carrier are likely to exceed 6. Especially sharing unlicensed licensed frequency bands. The unlicensed licensed frequency band refers to a frequency spectrum resource which is allowed to be tried out freely by the country, and only the use range of the frequency band and the wireless performance of the transmitter/receiver are subjected to some regulations, so long as wireless devices meeting the regulations can use the frequency band free of charge.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

due to the limitation of the processing capability of the UE, it is impossible to realize that more than 6 core network operators share the same carrier of the base station.

[ summary of the invention ]

The embodiment of the invention provides a communication connection method and a communication connection device, which can realize that more than 6 core network operators share the same carrier wave of a base station on the premise of not improving the hardware of UE, and improve the sharing capability of a wireless access network.

In a first aspect, an embodiment of the present invention provides a communication connection method, which is applied to a base station, and the method includes:

broadcasting at least one first network identifier, wherein the at least one first network identifier is a network identifier of a Radio Access Network (RAN) network, each first network identifier corresponds to at least one second network identifier, and the second network identifiers are network identifiers of a core network;

when a network access request of User Equipment (UE) is received, determining a second network identifier of a core network serving the UE according to network identifier information in the network access request;

and accessing the UE to the core network serving the UE according to the second network identifier of the core network serving the UE so that the UE can communicate with the core network serving the UE.

The foregoing aspects and any possible implementations further provide an implementation, where the network identification information includes a first network identification selected by the UE or a second network identification corresponding to the first network identification selected by the UE.

The foregoing aspects and any possible implementations further provide an implementation where the network identification information further includes a second network identification of the core network that the UE is registered with or a second network identification of the core network in the international mobile subscriber identity IMSI of the UE.

The above-described aspect and any possible implementation further provide an implementation in which, before broadcasting the at least one first network identification, the method further includes:

obtaining the at least one first network identification to be broadcast.

The above-described aspect and any possible implementation further provide an implementation in which the obtaining of the at least one first network identifier to be broadcasted includes:

and acquiring a first network identifier to be broadcasted in each cell corresponding to the base station according to configuration information of an operation maintenance center of a RAN operator.

and acquiring a first network identifier to be broadcasted in each cell according to a second network of a core network supported by each cell of the base station and a preset corresponding relation between the second network and the first network.

The above-mentioned aspects and any possible implementation manners further provide an implementation manner, where obtaining a first network identifier to be broadcasted in each cell according to a second network of a core network supported by each cell of the base station and a preset correspondence between the second network and the first network, includes:

if a corresponding relationship exists between a second network of a core network supported by a cell of the base station and the first network, acquiring a first network identifier to be broadcasted in the cell; or,

and if the second network which takes the second network of the core network supported by the cell of the base station as the equivalent network has a corresponding relation with the first network, acquiring the first network identifier to be broadcasted in the cell.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where determining a second network identifier of a core network serving the UE according to network identifier information in the network access request includes:

if the network identification information comprises a first network identification selected by the UE, determining a second network identification corresponding to the first network identification selected by the UE as a second network identification of a core network serving the UE;

if the network identification information comprises a second network identification corresponding to the first network identification selected by the UE, determining that the second network identification is the second network identification of a core network serving the UE; or, determining that the identity of the equivalent network of the second network is the second network identity of the core network serving the UE.

and if the network identification information comprises a second network identification of the core network registered by the UE, determining the second network identification of the core network registered by the UE as the second network identification of the core network serving the UE.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where determining a second network identifier of a core network serving the UE according to a first network identifier in the network access request includes:

if the network identification information comprises a second network identification of the core network in the IMSI of the UE, determining the second network identification of the core network in the IMSI as the second network identification of the core network serving the UE; or,

and determining that the identity of the equivalent network of the second network corresponding to the second network identity of the core network in the IMSI is the second network identity of the core network serving the UE.

The foregoing aspects and any possible implementations further provide an implementation in which the international mobile subscriber identity IMSI of the UE is an international mobile subscriber identity IMSI included in an attach request non-access stratum NAS message sent by the UE to a core network device.

The foregoing aspect and any possible implementation manner further provide an implementation manner that accesses the UE to a core network serving the UE according to a second network identifier of the core network serving the UE, including:

and selecting the core network equipment serving the UE according to the second network identifier of the core network serving the UE, and sending the second network identifier of the core network serving the UE to the selected core network equipment.

The above-described aspects and any possible implementations further provide an implementation, and the method further includes:

sending an S1setup request message to a core network device, where the S1setup request message includes a second network identifier of a core network supported by the base station;

receiving an S1setup response message returned by the core network device, where the S1setup response message includes a second network identifier of a core network supported by the core network device;

when the UE accesses the base station, selecting the core network device serving the UE according to the second network identifier included in the S1setup response message and the second network identifier of the core network serving the UE, so as to send the second network identifier of the core network serving the UE to the core network device.

In a second aspect, an embodiment of the present invention provides a communication connection method, which is applied to a user equipment UE, and the method includes:

when a first network identifier broadcasted by a base station is received, network selection is carried out according to the first network identifier or a second network identifier corresponding to the first network identifier, wherein the first network identifier is a network identifier of a Radio Access Network (RAN) network, and the second network identifier is a network identifier of a core network;

according to the result of network selection, sending a network access request to a base station, wherein the network access request comprises network identification information, so that the base station determines a second network identification of a core network serving the UE according to the network identification information, and accesses the UE to the core network serving the UE according to the second network identification of the core network serving the UE;

communicating with a core network serving the UE.

The foregoing aspects and any possible implementations further provide an implementation, where the network identification information includes a first network identification selected by the UE, or a second network identification corresponding to the first network identification selected by the UE.

The foregoing aspects and any possible implementations further provide an implementation where the network identification information further includes a second network identification of a core network to which the UE is registered, or a second network identification of the core network in an international mobile subscriber identity IMSI of the UE.

The above-described aspect and any possible implementation manner further provide an implementation manner for sending a network access request to a base station according to a result of network selection, including:

and if the first network corresponding to the first network identifier is the equivalent network of the home network of the UE, or the first network corresponding to the first network identifier has a corresponding relationship with the home network of the UE, selecting the first network corresponding to the first network identifier and sending a network access request to a base station.

In a third aspect, an embodiment of the present invention provides a communication connection apparatus, which is disposed in a base station, and includes:

a broadcasting module, configured to broadcast at least one first network identifier, where the at least one first network identifier is a network identifier of a radio access network RAN network, each first network identifier corresponds to at least one second network identifier, and the second network identifier is a network identifier of a core network;

the device comprises a determining module, a first network identification module and a second network identification module, wherein the determining module is used for determining a second network identification of a core network serving User Equipment (UE) according to network identification information in a network access request when the network access request of the UE is received;

and the access module is used for accessing the UE to the core network serving the UE according to the second network identifier of the core network serving the UE so as to facilitate the communication between the UE and the core network serving the UE.

The above-described aspects and any possible implementations further provide an implementation, where the apparatus further includes:

an obtaining module, configured to obtain the at least one first network identifier to be broadcasted by the broadcasting module.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the obtaining module, when configured to determine the at least one first network identifier to be broadcasted, is specifically configured to:

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the obtaining module, when configured to obtain the at least one first network identifier to be broadcasted, is specifically configured to:

As to the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, where the obtaining module is configured to, when being configured to obtain, according to a second network of a core network supported by each cell of the base station and a preset correspondence between the second network and a first network, a first network identifier to be broadcasted in each cell, specifically:

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the determining module, when configured to determine, according to the network identification information in the network access request, a second network identification of a core network serving the UE, is specifically configured to:

and if the network identification information comprises a second network identification corresponding to the first network identification selected by the UE, determining that the second network identification corresponding to the first network identification selected by the UE is the second network identification of the core network serving the UE.

if the network identification information includes a second network identification of the core network included in the IMSI of the UE, determining the second network identification of the core network in the IMSI as the second network identification of the core network serving the UE; or,

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the access module, when configured to access the UE to a core network serving the UE according to a second network identifier of the core network serving the UE, is specifically configured to:

and the selecting and sending module is used for selecting the core network equipment serving the UE according to the second network identifier of the core network serving the UE and sending the second network identifier of the core network serving the UE to the selected core network equipment.

a request sending module, configured to send an S1setup request message to a core network device, where the S1setup request message includes a second network identifier of a core network supported by the base station;

a response receiving module, configured to receive an S1setup response message returned by the core network device, where the S1setup response message includes a second network identifier of a core network supported by the core network device;

an identifier sending module, configured to select, when the UE accesses the base station, a core network device serving the UE according to the second network identifier included in the S1setup response message and the second network identifier of the core network serving the UE, so as to send the second network identifier of the core network serving the UE to the core network device.

In a fourth aspect, an embodiment of the present invention provides a communication connection apparatus, which is disposed in a user equipment UE, and includes:

the network selection module is used for selecting a network according to a first network identifier broadcasted by a base station or a second network identifier corresponding to the first network identifier when receiving the first network identifier, wherein the first network identifier is a network identifier of a Radio Access Network (RAN) network, and the second network identifier is a network identifier of a core network;

a request module, configured to send a network access request to a base station according to a result of network selection, where the network access request includes network identification information, so that the base station determines, according to the network identification information, a second network identification of a core network serving the UE, and accesses, according to the second network identification of the core network serving the UE, the UE to the core network serving the UE;

a communication module for communicating with a core network serving the UE.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the request module, when configured to send a network access request to the base station according to a result of network selection, is specifically configured to:

and if the first network is the equivalent network of the home network of the UE, or the first network and the home network of the UE have a corresponding relation, selecting the first network and sending a network access request to a base station.

The embodiment of the invention has the following beneficial effects:

meanwhile, the communication connection method provided by the embodiment of the invention also reduces the number of P L MN IDs indicated in the broadcast message, thereby reducing the complexity of network selection of the UE.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a flowchart illustrating a communication connection method according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a communication connection method according to a second embodiment of the present invention;

fig. 3 is a flowchart illustrating a communication connection method according to a third embodiment of the present invention;

fig. 4 is a flowchart illustrating a communication connection method according to a fourth embodiment of the present invention;

fig. 5 is a flowchart of a communication connection method in an example first embodiment of the present invention.

Fig. 6 is a flowchart of a communication connection method in example two according to the embodiment of the present invention.

Fig. 7 is a flowchart of a communication connection method in example three according to the embodiment of the present invention.

Fig. 8 is a block diagram of a communication connection device according to a fifth embodiment of the present invention.

Fig. 9 is a flowchart illustrating a communication connection method according to a sixth embodiment of the present invention.

Fig. 10 is a block diagram of a communication connection device according to a seventh embodiment of the present invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that although the terms first, second, third, etc. may be used to describe the network identifiers in the embodiments of the present invention, the network identifiers should not be limited to these terms. These terms are only used to distinguish network identifications from one another. For example, the first network identification may also be referred to as a second network identification, and similarly, the second network identification may also be referred to as a first network identification without departing from the scope of embodiments of the present invention. The embodiment of the invention provides a communication connection method, and the communication connection method in each embodiment of the invention can be applied to a base station.

Example one

The embodiment of the invention provides a connection communication connection method, which is applied to a base station.

Fig. 1 is a flowchart illustrating a communication connection method according to an embodiment of the present invention. As shown in fig. 1, in this embodiment, the communication connection method may include the following steps:

step S101, broadcasting at least one first network identifier, wherein the at least one first network identifier is a network identifier of a Radio Access Network (RAN) network, each first network identifier corresponds to at least one second network identifier, and the second network identifiers are network identifiers of a core network;

step S102, when receiving a network access request of User Equipment (UE), determining a second network identifier of a core network serving the UE according to network identifier information in the network access request;

step S103, accessing the UE to the core network serving the UE according to the second network identifier of the core network serving the UE, so that the UE can communicate with the core network serving the UE.

Herein, the first network is a radio access network RAN network, and the second network is a core network.

The network identification may also be referred to as a network ID.

The base station may broadcast the first network identifier by sending a broadcast message SIB1, that is, sending the network identifier of the RAN network in a broadcast message SIB 1.

The user equipment UE performs network selection according to a first network identifier broadcast by the base station or according to a second network identifier corresponding to the first network identifier, and when the UE needs to access the network, the UE sends a network access request to the base station, wherein the network access request carries network identifier information. The network access request may specifically be a Radio Resource Control (RRC) connection setup complete message.

In an exemplary implementation procedure, the network identification information in the network access request may include the first network identification selected by the UE or a second network identification corresponding to the first network identification selected by the UE, and preferably, the second network identification is a home network identification of the UE.

In an exemplary implementation procedure, the network identification information in the network access request may further include a second network identification of the core network that the UE is registered with or a second network identification of the core network (i.e., a home network identification of the UE) in the international mobile subscriber identity IMSI of the UE.

After the RRC connection is established, the UE sends an RRC connection establishment completion message RCConnectionSetupCompute to the base station, and a selected P L MN-Identity field contained in the message is set as a first network identifier selected by the UE or set as a second network identifier of a core network corresponding to the first network identifier selected by the UE.

If the UE has a registered MME, the UE sets a register MME field in the RRC connection establishment completion message as a registered MME identifier, the registered MME identifier comprises a second network identifier of a registered core network, and the dedicatedInfoNAS field is an attach request NAS message or a tracking area update request NAS message sent to the MME by the UE. If the UE does not have a registered MME, the RRC connection establishment completion message does not contain a registered MME field, the dedicatedinfonnas field is an attach request NAS message sent to the MME by the UE, and the attach request NAS message can contain IMSI information of the UE.

In a specific implementation process, determining a second network identifier of a core network serving the UE according to network identifier information in the network access request may include: if the network identification information contains the first network identification selected by the UE, determining that the second network identification of the core network corresponding to the first network identification selected by the UE is the second network identification of the core network serving the UE; and if the network identification information contains a second network identification corresponding to the first network identification selected by the UE, determining that the second network identification corresponding to the first network identification selected by the UE is the second network identification serving the UE, or determining that the identification of the equivalent network of the second network is the second network identification serving the core network of the UE. For example, when the network identifier information includes a second network identifier corresponding to the first network identifier selected by the UE, if the cell to which the UE is accessed supports the second network, the second network is selected as the core network serving the UE, otherwise, only the equivalent network of the second network supported by the cell is selected as the core network serving the UE. In order to implement this function, the base station needs to store the identification of the second network that is equivalent to the supported second network.

In a specific implementation procedure, determining a second network identifier of a core network serving the UE according to a first network identifier of the network access request may include: and if the network identification information contains the second network identification of the core network registered by the UE, determining that the second network identification of the core network registered by the UE is the second network identification of the core network serving the UE.

In a specific implementation procedure, determining a second network identifier of a core network serving the UE according to a first network identifier of the network access request may include: if the network identification information includes the second network identification of the core network included in the IMSI of the UE, determining that the second network identification of the core network included in the IMSI of the UE is the second network identification of the serving UE, or determining that the identification of the equivalent network of the second network corresponding to the second network identification of the core network in the IMSI of the UE is the second network identification of the serving UE. For example, when the network identifier information includes the second network identifier of the core network in the IMSI of the UE, if the cell to which the UE is accessed supports the second network, the base station selects the second network as the second network serving the core network of the UE, otherwise, only the equivalent network of the second network supported by the cell can be selected as the core network serving the UE. In order to implement this function, the base station needs to store the identification of the second network that is equivalent to the supported second network. In an exemplary implementation, the international mobile subscriber identity IMSI of the UE is the international mobile subscriber identity IMSI included in a Non-access stratum (NAS) message sent by the UE to the core network device.

In an exemplary implementation procedure, after determining a second network identifier of a core network serving the UE according to the first network identifier in the network access request, the communication connection method may further include: and selecting the core network equipment serving the UE according to the second network identifier of the core network serving the UE, and sending the second network identifier of the core network serving the UE to the selected core network equipment.

In an exemplary implementation, the communication connection method may further include: sending an S1Setup Request message S1Setup Request to the core network equipment, wherein the S1Setup Request message contains a second network identifier of the core network supported by the base station; receiving an S1Setup Response message S1Setup Response returned by the core network device, S1 setting up a second network identifier of the core network supported by the core network device contained in the Response message; when the UE accesses the base station, the core network device serving the UE is selected according to the second network identifier included in the setup response message of S1 and the second network identifier of the core network serving the UE, so as to send the second network identifier of the core network serving the UE to the core network device. The above implementation processes may also be combined in specific implementations, such as:

if the Selected P L MN reported by the UE is the second network identifier of the core network corresponding to the first network, the base station uses the second network identifier of the core network of the UE as the second network identifier of the core network serving the UE.

If the UE reports the selected first network identifier and only supports one core network in the cell to which the UE is accessed, that is, the first network identifier corresponds to only one core network identifier, the base station determines the core network identifier corresponding to the selected first network identifier reported by the UE as the core network ID serving the UE.

If the UE reports the selected first network identifier and supports more than two core network networks in the network to which the UE is accessed, that is, the first network identifier corresponds to a plurality of core network identifiers, when an RRC connection establishment completion message contains a registered MME field, the base station determines the network ID in the registered MME, that is, RP L MN (registered P L MN ) of the UE as the core network ID of the service UE, and when the MME connected with the base station does not support the network ID contained in the registered MME field or when the RRC connection establishment completion message does not contain the registered MME field, the base station analyzes an attach request NAS message in a dedicatedinfo NAS to obtain the IMSI of the UE contained in the attach request, the IMSI contains the HP L1 MN ID of the UE, the base station determines the HP L MN (Home P L MN ) ID in the HP L MN (Home P L MN ) ID as the core network ID of the service UE, and if the HP L of the base station does not support the EP 585 of the serving MN (EP L) of the MN, EP 3876) of the serving the cell MN.

For example, according to the method, the HP L MN selects a network P L MN a broadcasted by the base station for the UE of the P L MN a as the serving network, the UE reports the P L MN a as the selected serving network in the RRCConnectionSetupComplete message, if the P632 MN a in the cell to which the UE is accessed only supports one core network ID P L MN a, the base station can determine that the core network ID of the serving UE is P L MN a, if the P L MN a in the cell to which the UE is accessed supports multiple core network IDs, the base station determines whether the RRC connection establishment completion message contains a registered MME field, if the UE is not the first time registered network, the registered MME field in the message indicates that the core network ID registered by the UE is P L MN a, if the base station supports the registration request of the RRC _ registration field of the serving MN, the base station 368 MN is used as the core network ID of the serving UE, if the UE is not the first time registered network, the registered MME field indicates that the registered core network ID of the UE is P5842 MN a is P356 MN a, if the registration request message indicates that the UE is an RRC _ ims of the registration session registration request, the network ID of the network registration request of the UE is a, the network P598 MN a, the network ID of the UE is a, if the registration request that the UE is a registration request that the registration request of the network registration session registration request of the network MN is identical to the UE is identical to the network MN, the network registration session registration request, the UE is not, the NAS registration request that the UE is a, the session registration.

The communication connection method provided by the embodiment of the invention has the advantages that the base station only broadcasts the network identification of the RAN network, and one RAN network can correspond to a plurality of core networks, so that the same carrier wave shared by more than 6 core network operators can be supported, the hardware improvement on the UE is not needed, the purpose of supporting the same carrier wave shared by more than 6 core network operators to share the base station on the premise of not improving the hardware of the UE is realized, and the sharing capability of the wireless access network is improved.

Example two

The embodiment of the invention provides a communication connection method, which is applied to a base station.

Fig. 2 is a flowchart illustrating a communication connection method according to a second embodiment of the present invention. As shown in fig. 2, in this embodiment, the communication connection method may include the following steps:

step S201, at least one first network identifier to be broadcasted is acquired.

In a specific implementation procedure, acquiring at least one first network identifier to be broadcasted may include: and acquiring a first network identifier to be broadcasted in each cell corresponding to the base station according to the configuration information of the operation maintenance center of the RAN operator.

The operation and maintenance center of the RAN operator can directly configure the P L MNID sent by the system broadcast of each cell of the base station, so that the base station can directly acquire the network identifier of the RAN network to be broadcast of each cell of the base station according to the configuration information of the operation and maintenance center of the RAN operator.

In a specific implementation procedure, acquiring at least one first network identifier to be broadcasted may include: and acquiring a first network identifier to be broadcasted in each cell according to a second network of a core network supported by each cell of the base station and a preset corresponding relation between the second network and the first network.

The operation maintenance center of the RAN operator may also configure a corresponding relationship between the network identifier of the core network and the network identifier of the RAN network, and then the base station finds out the corresponding network identifier of the RAN network from the corresponding relationship according to the network identifier of the core network supported by each cell, that is, the network identifier of the RAN network to be broadcast by each cell of the base station can be obtained.

For example, the network identifier of the core network supported by the cell 1 of the base station is a, and in the correspondence between the network identifier of the core network and the network identifier of the RAN network, the network identifiers of the RAN network corresponding to the network identifier a of the core network are a and B, and the base station determines that the network identifiers of the RAN network broadcast in the cell 1 are a and B.

In a specific implementation process, acquiring a first network identifier to be broadcasted in each cell according to a second network of a core network supported by each cell of a base station and a preset corresponding relationship between the second network and the first network, includes: if a corresponding relation exists between a second network of a core network supported by a cell of a base station and a first network, acquiring a first network identifier to be broadcasted in the cell; or, if there is a correspondence between the first network and a second network that uses a second network of the core network supported by the cell of the base station as an equivalent network, acquiring the first network identifier to be broadcast in the cell.

For example, a network identifier a of a core network supported by a cell 1 of a base station is a, and if the core network identifier a and a network identifier a of a RAN network have a corresponding relationship, the network identifier a of the RAN network is broadcast in the cell 1; the network identifier of the core network supported by the cell 1 of the base station is b, but the network identifier b of the core network does not have a corresponding relationship with the network identifier a of the RAN network, but the network a using the network b as an equivalent network has a corresponding relationship with the network identifier a of the RAN network, and then the cell 1 still broadcasts the network identifier a of the RAN network.

Step S202, broadcasting at least one first network identifier, wherein the at least one first network identifier is a network identifier of a Radio Access Network (RAN) network, each first network identifier corresponds to at least one second network identifier, and the second network identifiers are network identifiers of a core network;

step S203, when receiving a network access request of User Equipment (UE), determining a second network identifier of a core network serving the UE according to network identifier information in the network access request;

step S204, according to the second network identification of the core network serving the UE, the UE is accessed to the core network serving the UE, so that the UE can communicate with the core network serving the UE.

The communication connection method provided by the embodiment of the invention has the advantages that the base station only needs to broadcast the network identifier of the RAN network, and one RAN network can correspond to a plurality of core networks, so that the same carrier wave shared by more than 6 core network operators can be supported, the hardware improvement on the UE is not needed, the purpose of supporting the same carrier wave shared by more than 6 core network operators to share the base station on the premise of not improving the hardware of the UE is realized, and the sharing capability of a wireless access network is improved.

EXAMPLE III

Fig. 3 is a flowchart illustrating a communication connection method according to a third embodiment of the present invention. As shown in fig. 3, in this embodiment, the communication connection method may include the following steps:

step S301, broadcasting at least one first network identifier, wherein the at least one first network identifier is a network identifier of a Radio Access Network (RAN) network, each first network identifier corresponds to at least one second network identifier, and the second network identifiers are network identifiers of a core network;

step S302, when receiving a network access request of User Equipment (UE), determining a second network identifier of a core network serving the UE according to network identifier information in the network access request;

so that the UE communicates with a core network serving the UE, wherein the second network identifier is a network identifier of the core network;

step S303, selecting the core network device serving the UE according to the second network identifier of the core network serving the UE, and sending the second network identifier of the core network serving the UE to the selected core network device.

When a RAN Operator provides services to a Core Network Operator, an S1 interface is established between a base station of the RAN Operator and Core Network equipment of the Core Network Operator, that is, an S1-C signaling connection is established between the base station and an MME, and a GTP (GPRS Tunneling Protocol) connection of S1-U is established between the base station and an SGW (serving GateWay), and the networking mode may be an MOCN (Multi-Operator Core Network) or a GWCN (GateWay Core Network).

For example, the base station may select a MME with a light load from the MMEs supporting the core network ID of the serving UE, the network ID registered by the UE on the network side is the core network ID, the base station reports the core network operator ID of the serving UE to the selected MME of the serving UE through a TAI (Tracking area Identity) field in an initial UE message (initial UE message), a P L MN ID in the TAI field indicates the core network operator ID of the serving UE, and a TAC (Tracking area code) of the TAI field is a Tracking area Identity of a cell to which the UE is accessed.

Example four

Fig. 4 is a flowchart illustrating a communication connection method according to a fourth embodiment of the present invention. As shown in fig. 4, in this embodiment, the communication connection method may include the following steps:

step S401, sending S1 establishment Request message S1Setup Request to the core network equipment, S1 the establishment Request message contains the second network identification of the core network supported by the base station;

for example, the base station will send S1 a Setup Request message (S1Setup Request) to the MME to initiate S1 connection Setup, setting BroadcastP L MN field in the S1Setup Request message to the core network ID supported by the base station.

Since the serving network ID registered by the UE on the network side is the core network ID, the TAI included in the TAI list registered by the UE is also the core network ID., in order to implement a correct paging procedure, the base station sends the broadcast L MN field of the Supported TAs in the S1setup request message to the MME, as the core network ID Supported by the base station, so that the MME sends the paging message of the UE to the cell where the tracking area in the tracking area list of the UE is located.

For example, the base station of the RAN operator provides service to the network P L MN a/b/c (representing P L MN a, P L MN b, P L MN c) of the core network operator, the base station broadcasts the network ID P L MN a of the RAN operator in the system broadcast SIB1, the base station fills out the tracking area ID of the cell of the base station in the TAC field of the Supported TAs of the S1setup request message, and fills out the Supported core network ID (P L MN a/b/c) in the BroadcastP L MN field of the Supported TAs, instead of the RAN operator network ID (P L MN a) actually broadcast by the base station, wherein P L MN a is the RAN operator network ID sent by the base station from the system broadcast directly acquired from the configuration information of the operation and maintenance center of the RAN operator, or the RAN operator ID corresponding relationship between the network P L a/b/c and the RAN operator configured by the base station according to the operation and maintenance center.

Step S402, receiving S1 establishment Response message S1Setup Response returned by the core network device, S1 establishment Response message including the second network identifier of the core network supported by the core network device;

for example, the base station receives an S1Setup Response message (S1Setup Response) sent by the MME, and determines the core network ID supported by the MME according to the servdp L MNs in the S1Setup Response message.

The base station acquires the core network ID supported by the MME through the ServedP L MNs in the S1Setup Response message sent by the MME, so that the MME supporting the core network operator network ID of the serving UE is selected for the UE when the UE accesses the base station.

Step S403, broadcasting at least one first network identifier, wherein the at least one first network identifier is a network identifier of a Radio Access Network (RAN) network, each first network identifier corresponds to at least one second network identifier, and the second network identifiers are network identifiers of a core network;

step S404, when receiving a network access request of User Equipment (UE), determining a second network identifier of a core network serving the UE according to network identifier information in the network access request;

step S405, when the UE accesses the base station, selecting the core network device serving the UE according to the second network identifier included in the setup response message of S1 and the second network identifier of the core network serving the UE, so as to send the second network identifier of the core network serving the UE to the core network device.

The communication connection method provided by the embodiment of the present invention is further explained by exemplifying an example. The communication connection methods of example one, example two, example three, and example four below are all applied to a base station.

Example 1

Fig. 5 is a flowchart of a communication connection method in an example first embodiment of the present invention. As shown in fig. 5, in this example, the communication connection method may include the following steps:

step a1, the base station determines the RAN operator network ID carried in the broadcast message SIB1 to be transmitted;

step a2, the base station sends a broadcast message SIB1, SIB1 carries the RAN operator network ID determined by the base station;

step a3, after receiving the broadcast message SIB1, the UE selects a RAN operator network ID from the RAN operator network IDs carried by SIB 1;

step a4, the UE randomly accesses to the base station and establishes RRC connection with the base station;

step a5, after the RRC connection is established, the UE sends RRC connection establishment completion information to the base station, and reports the selected RAN operator network ID to the base station;

a6, the base station determines the network ID of the core network serving the UE according to the RAN operator network ID reported by the UE and the corresponding relationship between the preset core network operator network identifier and the RAN operator network identifier;

step a7, the base station sends an initial UE message to the MME, where the initial UE message carries the network ID of the core network serving the UE.

Example two

Fig. 6 is a flowchart of a communication connection method in example two according to the embodiment of the present invention. As shown in fig. 6, in this example, the communication connection method may include the following steps:

step b1, the base station sets the BroadcastP L MN field of the S1 connection establishment request as the core network ID supported by the base station;

step b2, the base station sends S1 connection establishment request message to MME;

step b3, the MME sends an S1 connection establishment response message to the base station, and the S1 connection establishment response message carries the core network ID supported by the MME;

step b4, the base station acquires the core network ID supported by the MME from the S1 connection establishment response message;

step b5, the base station determines the RAN operator network ID carried in the broadcast message SIB1 to be sent;

in step b6, the base station sends a broadcast message SIB1, SIB1 carries the RAN operator network ID determined by the base station.

Example three

Fig. 7 is a flowchart of a communication connection method in example three according to the embodiment of the present invention. As shown in fig. 7, in this example, the communication connection method may include the following steps:

step c1, the base station determines the RAN operator network ID carried in the broadcast message SIB1 to be sent;

step c2, the base station sends a broadcast message SIB1, SIB1 carries the RAN operator network ID determined by the base station;

step c3, MME sends paging message to base station, the paging message carries network ID of core network;

step c4, the base station compares the network ID of the core network supported by each cell with the network ID of the core network carried in the paging message, and determines the cell for sending the paging message;

in step c5, the base station transmits a paging message to the determined cell.

Example four

Step d1, the base station determining the network identity of at least one RAN operator to broadcast;

d2, under the condition of meeting preset conditions, the base station broadcasts the determined network identification of at least one RAN operator;

step d3, the base station receives a paging message sent by the MME, and the paging message carries the network identifier of the core network operator;

when the MME initiates UE paging, the network ID indicated by each TAI of a TAI list registered by the UE in a UE paging message sent to the base station is the core network ID.

And d4, the base station determines the cell broadcasting the paging message according to the relationship between the network identifier of the core network operator supported by each cell corresponding to the base station and the network identifier of the core network operator carried in the paging message.

For example, the core network ID supported by the cell 1 is P L MN a, and the broadcasted RAN operator network ID is P L MN a, and the base station compares the P L MN a with the TAI in the TAI list in the paging message.

In order to implement the steps and methods in the above communication connection method embodiment, the embodiment of the present invention further provides an embodiment of a communication apparatus. The communication apparatus of each embodiment of the present invention may be provided in a base station.

EXAMPLE five

The embodiment of the invention provides a communication connection device, which is arranged in a base station.

Fig. 8 is a block diagram of a communication connection device according to a fifth embodiment of the present invention. As shown in fig. 8, in this embodiment, the communication connection apparatus 800 may include a broadcasting module 810, a determining module 820, and an accessing module 830.

The broadcasting module 810 is configured to broadcast at least one first network identifier, where the at least one first network identifier is a network identifier of a radio access network RAN network, each first network identifier corresponds to at least one second network identifier, and the second network identifier is a network identifier of a core network. The determining module 820 is configured to determine, according to the network identifier information in the network access request, a second network identifier of the core network serving the UE when the network access request of the UE is received, and the accessing module 830 is configured to access the UE to the core network serving the UE according to the second network identifier of the core network serving the UE, so that the UE communicates with the core network serving the UE.

In a specific implementation procedure, the network identification information may include a first network identification selected by the UE or a second network identification corresponding to the first network identification selected by the UE.

In a specific implementation procedure, the network identification information may further include a second network identification of the core network to which the UE is registered or a second network identification of the core network included in the international mobile subscriber identity IMSI of the UE.

In a specific implementation process, the communication connection device may further include: an obtaining module, configured to obtain at least one first network identifier to be broadcasted by the broadcasting module 810.

In a specific implementation process, the obtaining module, when configured to obtain at least one first network identifier to be broadcasted, may be specifically configured to: and acquiring a first network identifier to be broadcasted in each cell corresponding to the base station according to configuration information of an operation maintenance center of a RAN operator. In a specific implementation process, the obtaining module, when configured to obtain at least one first network identifier to be broadcasted, may be specifically configured to: and acquiring the first network identification to be broadcasted in each cell according to the second network identification of the core network supported by each cell corresponding to the base station and the corresponding relation between the preset second network identification and the first network identification.

In a specific implementation process, when the obtaining module is configured to obtain, according to a second network of a core network supported by each cell of the base station and a preset corresponding relationship between the second network and the first network, a first network identifier to be broadcasted in each cell, the obtaining module may be specifically configured to: if a corresponding relation exists between a second network of a core network supported by a cell of a base station and a first network, acquiring a first network identifier to be broadcasted in the cell; or, if there is a correspondence between the first network and a second network that uses a second network of the core network supported by the cell of the base station as an equivalent network, acquiring the first network identifier to be broadcast in the cell. In a specific implementation procedure, when the determining module 820 is configured to determine the second network identifier of the core network serving the UE according to the network identifier information in the network access request, it may specifically be configured to: if the network identification information contains the first network identification selected by the UE, determining that the second network identification of the core network corresponding to the first network identification selected by the UE is the second network identification of the core network serving the UE; and if the network identification information contains a second network identification corresponding to the first network identification selected by the UE, determining the second network identification corresponding to the first network identification selected by the UE as the second network identification serving the UE.

In a specific implementation process, when the determining module is configured to determine the second network identifier of the core network serving the UE according to the network identifier information in the network access request, the determining module may be specifically configured to: and if the network identification information comprises the second network identification of the core network registered by the UE, determining that the second network identification of the core network registered by the UE is the second network identification of the core network serving the UE.

In a specific implementation procedure, when the determining module 820 is configured to determine the second network identifier of the core network serving the UE according to the network identifier information in the network access request, it may specifically be configured to: if the network identification information includes the second network identification of the core network in the IMSI of the UE, determining that the second network identification of the core network in the IMSI of the UE is the second network identification of the core network serving the UE, or determining that the identification of the equivalent network of the second network corresponding to the second network identification of the core network in the IMSI is the second network identification of the core network serving the UE.

In a specific implementation procedure, the international mobile subscriber identity IMSI of the UE is the international mobile subscriber identity IMSI included in an attach request NAS message sent by the UE to the core network device.

In a specific implementation process, when the access module 830 is configured to access the UE to the core network serving the UE according to the second network identifier of the core network serving the UE, the communication connection apparatus is specifically configured to select the core network device serving the UE according to the second network identifier of the core network serving the UE, and send the second network identifier of the core network serving the UE to the selected core network device.

In a specific implementation process, the communication connection device may further include: a Request sending module, configured to send an S1Setup Request message S1Setup Request to the core network device, where the S1Setup Request message includes a second network identifier of the core network supported by the base station; a response receiving module, configured to receive an S1setup response message S1setup response returned by the core network device, where the S1setup response message includes a second network identifier of the core network supported by the core network device; and an identifier sending module, configured to select, when the UE accesses the base station, the core network device serving the UE according to the second network identifier included in the setup response message of S1 and the second network identifier of the core network serving the UE, so as to send the second network identifier of the core network serving the UE to the core network device.

Since the communication connection apparatus in this embodiment is capable of executing the communication connection method described in the foregoing first embodiment, second embodiment, third embodiment and fourth embodiment of the present invention, reference may be made to the related descriptions of the communication connection method embodiments in the foregoing first embodiment, second embodiment, third embodiment and fourth embodiment of the present invention for the part of this embodiment that is not described in detail.

The communication connection device provided by the embodiment of the invention has the advantages that the base station only broadcasts the network identification of the RAN network, and one RAN network can correspond to a plurality of core networks, so that the same carrier wave shared by more than 6 core network operators can be supported, the hardware improvement on the UE is not needed, the purpose of supporting the same carrier wave shared by more than 6 core network operators to share the base station on the premise of not improving the hardware of the UE is realized, and the sharing capability of a wireless access network is improved.

EXAMPLE six

The embodiment of the invention provides a communication connection method, which is applied to User Equipment (UE).

Fig. 9 is a flowchart illustrating a communication connection method according to a sixth embodiment of the present invention. As shown in fig. 9, in this embodiment, the communication connection method may include the following steps:

step S901, when receiving a first network identifier broadcast by a base station, selecting a network according to the first network identifier or a second network identifier corresponding to the first network identifier, where the first network identifier is a network identifier of a RAN network in a radio access network, and the second network identifier is a network identifier of a core network;

step S902, according to the result of network selection, sending a network access request to the base station, wherein the network access request comprises network identification information, so that the base station determines a second network identification of the core network serving the UE according to the network identification information, and accesses the UE to the core network serving the UE according to the second network identification of the core network serving the UE;

step S903, communicating with the core network serving the UE.

In a specific implementation procedure, the network identification information may include a first network identification selected by the UE, or a second network identification corresponding to the first network identification selected by the UE. Preferably, the second network identifier corresponds to the second network being the home network of the UE.

In a specific implementation procedure, the network identification information may further include a second network identification of the core network to which the UE is registered, or a second network identification of the core network included in the international mobile subscriber identity IMSI of the UE. In a specific implementation process, sending a network access request to a base station according to a result of network selection includes: and if the first network corresponding to the first network identifier is the equivalent network of the home network of the UE, or the first network corresponding to the first network identifier has a corresponding relationship with the home network of the UE, selecting the first network corresponding to the first network identifier and sending a network access request to the base station.

For example, the first network provides roaming service for the home network of the UE, the identity of the first network is stored in the UE as an equivalent network of the home network of the UE, and if the first network identity read by the UE from the broadcast message is the same as the stored equivalent network identity of the home network, the UE may select the first network. Or the first network provides roaming service for a home network of the UE, an identifier of the first network corresponding to the home network is stored in the UE, and if the first network identifier read from the broadcast message by the UE corresponds to the first network identifier corresponding to the home network, the UE may select the first network.

In the communication connection method provided by the embodiment of the invention, the UE selects the core network through the network identification of the RAN network broadcasted by the base station, the core network serving the UE can be selected from the core networks above 6, and the hardware improvement on the UE is not needed, so that the sharing capability of the wireless access network is improved by supporting the same carrier wave of the base station shared by the core network operators above 6 on the premise of not improving the hardware of the UE.

EXAMPLE seven

The embodiment of the invention provides a communication connection device, which is arranged in User Equipment (UE).

Fig. 10 is a block diagram of a communication connection device according to a seventh embodiment of the present invention. As shown in fig. 10, in this embodiment, the communication connection device 1000 may include:

a network selection module 1010, configured to, when receiving a first network identifier broadcast by a base station, perform network selection according to the first network identifier or a second network identifier corresponding to the first network identifier, where the first network identifier is a network identifier of a RAN network in a radio access network, and the second network identifier is a network identifier of a core network;

a request module 1020, configured to send a network access request to the base station according to a result of the network selection, where the network access request includes network identification information, so that the base station determines, according to the network identification information, a second network identification of the core network serving the UE, and accesses, according to the second network identification of the core network serving the UE, the UE to the core network serving the UE;

a communication module 1030 configured to communicate with a core network serving the UE.

In a specific implementation procedure, the network identification information may include a first network identification selected by the UE, or a second network identification corresponding to the first network identification selected by the UE.

In a specific implementation procedure, the network identification information may further include a second network identification of the core network to which the UE is registered, or a second network identification of the core network included in the international mobile subscriber identity IMSI of the UE.

In a specific implementation process, the request module 1020 is specifically configured to, when configured to send a network access request to a base station according to a result of network selection: and if the first network corresponding to the first network identifier is the equivalent network of the home network of the UE, or the first network corresponding to the first network identifier has a corresponding relationship with the home network of the UE, selecting the first network corresponding to the first network identifier and sending a network access request to the base station.

Since the communication connection apparatus in this embodiment is capable of executing the communication connection method described in the sixth embodiment of the present invention, reference may be made to the related description of the communication connection method in the sixth embodiment of the present invention for a part of this embodiment that is not described in detail.

The communication connection device provided by the embodiment of the invention enables the UE to select the core network through the network identification of the RAN network broadcasted by the base station, can select the core network serving the UE from more than 6 core networks, and does not need to improve the hardware of the UE, thereby realizing that operators of the core networks of more than 6 core networks share the same carrier wave of the base station on the premise of not improving the hardware of the UE, and improving the sharing capability of the wireless access network.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on at least two network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A communication connection method applied to a base station, the method comprising:

accessing the UE to a core network serving the UE according to a second network identifier of the core network serving the UE so that the UE can communicate with the core network serving the UE;

the network identification information in the network access request comprises a first network identification selected by the UE or a second network identification corresponding to the first network identification selected by the UE.

2. The method of claim 1, wherein the network identity information in the network access request further comprises a second network identity of the core network with which the UE is registered or a second network identity of the core network in an international mobile subscriber identity IMSI of the UE.

3. The method of claim 1, wherein prior to broadcasting at least one first network identification, the method further comprises:

obtaining the at least one first network identification to be broadcast.

4. The method of claim 3, wherein obtaining the at least one first network identifier to be broadcast comprises:

5. The method of claim 3, wherein obtaining the at least one first network identifier to be broadcast comprises:

6. The method of claim 5, wherein obtaining the first network identifier to be broadcasted in each cell according to the second network of the core network supported by each cell of the base station and a preset correspondence between the second network and the first network comprises:

7. The method of claim 1, wherein determining the second network identity of the core network serving the UE according to the network identity information in the network access request comprises:

8. The method of claim 2, wherein determining the second network identity of the core network serving the UE according to the network identity information in the network access request comprises:

9. The method of claim 2, wherein determining the second network identity of the core network serving the UE according to the first network identity in the network access request comprises:

10. The method of claim 2, wherein the international mobile subscriber identity IMSI of the UE is an international mobile subscriber identity IMSI included in an attach request non-access stratum NAS message sent by the UE to a core network device.

11. The method of claim 1, wherein accessing the UE to a core network serving the UE according to a second network identity of the core network serving the UE comprises:

12. The method of claim 1, further comprising:

13. A communication connection method is applied to User Equipment (UE), and comprises the following steps:

communicating with a core network serving the UE.

14. The method of claim 13, wherein the network identification information in the network access request includes a first network identification selected by the UE or a second network identification corresponding to the first network identification selected by the UE.

15. The method of claim 14, wherein the network identification information in the network access request further includes a second network identification of the core network that the UE is registered with, or a second network identification of the core network in an international mobile subscriber identity IMSI of the UE.

16. The method of claim 13, wherein sending a network access request to the base station based on the result of the network selection comprises:

17. A communication connection apparatus provided in a base station, the apparatus comprising:

the access module is used for accessing the UE to the core network serving the UE according to a second network identifier of the core network serving the UE so as to facilitate the communication between the UE and the core network serving the UE;

18. The apparatus of claim 17, wherein the network identity information in the network access request further comprises a second network identity of a core network to which the UE is registered or a second network identity of the core network in an international mobile subscriber identity IMSI of the UE.

19. The apparatus of claim 17, further comprising:

20. The apparatus according to claim 19, wherein the obtaining module, when configured to determine the at least one first network identifier to be broadcasted, is specifically configured to:

21. The apparatus according to claim 19, wherein the obtaining module, when configured to obtain the at least one first network identifier to be broadcasted, is specifically configured to:

22. The apparatus of claim 21, wherein the obtaining module, when configured to obtain the first network identifier to be broadcasted in each cell according to a second network of a core network supported by each cell of the base station and a preset correspondence between the second network and the first network, is specifically configured to:

23. The apparatus of claim 17, wherein the determining module, when configured to determine the second network identifier of the core network serving the UE according to the network identifier information in the network access request, is specifically configured to:

24. The apparatus of claim 18, wherein the determining module, when configured to determine the second network identifier of the core network serving the UE according to the network identifier information in the network access request, is specifically configured to:

25. The apparatus of claim 18, wherein the determining module, when configured to determine the second network identifier of the core network serving the UE according to the network identifier information in the network access request, is specifically configured to:

26. The apparatus of claim 18, wherein the international mobile subscriber identity IMSI of the UE is an international mobile subscriber identity IMSI included in an attach request non-access stratum NAS message sent by the UE to a core network device.

27. The apparatus of claim 17, wherein the access module, when configured to access the UE to the core network serving the UE according to the second network identifier of the core network serving the UE, is specifically configured to:

28. The apparatus of claim 17, further comprising:

29. A communication connection apparatus, provided in a user equipment UE, the apparatus comprising:

a communication module for communicating with a core network serving the UE.

30. The apparatus of claim 29, wherein the network identification information in the network access request includes a first network identification selected by the UE or a second network identification corresponding to the first network identification selected by the UE.

31. The apparatus of claim 30, wherein the network identity information in the network access request further comprises a second network identity of a core network to which the UE is registered, or a second network identity of the core network in an international mobile subscriber identity IMSI of the UE.

32. The apparatus of claim 29, wherein the request module, when configured to send a network access request to the base station according to a result of the network selection, is specifically configured to: