WO2017000583A1 - 一种终端接入方法及相应的终端、基站和主核心网 - Google Patents

一种终端接入方法及相应的终端、基站和主核心网 Download PDF

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Publication number
WO2017000583A1
WO2017000583A1 PCT/CN2016/075777 CN2016075777W WO2017000583A1 WO 2017000583 A1 WO2017000583 A1 WO 2017000583A1 CN 2016075777 W CN2016075777 W CN 2016075777W WO 2017000583 A1 WO2017000583 A1 WO 2017000583A1
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Prior art keywords
core network
access request
base station
identifier
matched
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PCT/CN2016/075777
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English (en)
French (fr)
Inventor
王安明
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中兴通讯股份有限公司
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Publication of WO2017000583A1 publication Critical patent/WO2017000583A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present application relates to, but is not limited to, a mobile communication system, and more particularly, to a terminal access method and corresponding terminal, base station, and primary core network.
  • the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) network sharing scheme is divided into the same situation as the PLMN (Public Land Mobile Network) and the different PLMN.
  • PLMN Public Land Mobile Network
  • LTE Long Term Evolution
  • the base station is connected to two or more core network networks, and when the terminal accesses, the selected PLMN is brought to the base station, and then the base station determines the core network accessed by the terminal according to the selected PLMN.
  • the MME Mobility Management Entity
  • sharing with the network of the PLMN indicating that the base station is connected to a mobile network, and different core networks connected to the base station (connecting different MMEs to the LTE network) are in the mobile network.
  • the "load sharing" relationship that is, when the user accesses, regardless of which core network in the range in which the base station selects the PLMN, the service can be established normally.
  • a terminal access method is applied to a base station connected to at least a plurality of core networks of a mobile network, wherein a core network having a redirection function in the plurality of core networks is a primary core network, and other core networks are a secondary core network.
  • the method includes:
  • the base station If the access request does not carry the core network identifier to be matched and the primary core network is routable, the base station sends an access request to the primary core network;
  • the base station If receiving the redirect message returned by the primary core network and the core network indicated in the redirect message is routable, the base station resends the access request to the indicated core network.
  • the method further includes: if the access request carries the core network identifier to be matched, and matches the routable according to the core network identifier.
  • the core network the base station sends an access request to the matched core network.
  • the method further includes:
  • the base station sends an access to the primary core network. request;
  • the base station If receiving the redirect message returned by the primary core network and the core network indicated in the redirect message is routable, the base station resends the access request to the indicated core network.
  • the method further includes:
  • the base station determines that the primary core network is a core network accessed by the terminal.
  • the method further includes:
  • the base station sends an access request to the secondary core network routable by the mobile network.
  • the access request carries a field indicating a core network identifier; if the core network identifier in the field is valid, the base station determines that the access request carries a core network identifier to be matched; If the identifier is invalid, the base station determines that the access request does not carry the core network identifier to be matched; or
  • the access request carries a first field indicating whether a core network identifier needs to be matched and a second field indicating a core network identifier; if the first field indicates that the core network identifier needs to be matched and the core network identifier in the second field is valid, Determining, by the base station, that the access request carries a core network identifier to be matched; if the first field indicates that the core network identifier does not need to be matched or the core network identifier in the second field is invalid, the base station determines that the access request does not carry a to-be-matched Core network identity.
  • the plurality of core networks of the mobile network are not connected to each other, or multiple core networks of the mobile network are connected but there is no load sharing relationship.
  • a base station connected to at least a plurality of core networks of a mobile network, including:
  • a configuration module configured to: configure a core network having a redirection function in the plurality of core networks as a primary core network, and configure other core networks as a secondary core network, and manage routes of the multiple core networks;
  • the receiving module is configured to: receive an access request sent by the terminal to access the mobile network;
  • a routing module configured to: when the access request does not carry a core network identifier to be matched, and the primary core network is routable, send an access request to the primary core network; if the primary core network is received The returned redirect message and the core network indicated in the redirect message are routable, resending the access request to the indicated core network.
  • the routing module is further configured to send an access request to the matched core network when the access request carries a core network identifier to be matched and matches the core network identifier to the routable core network. .
  • the routing module is further configured to: when the access request carries a core network identifier to be matched but does not match the routable core network according to the core network identifier, and the primary core network is routable, The primary core network sends an access request; if the redirect message returned by the primary core network is received and the core network indicated in the redirect message is routable, the base station retransmits the indicated core network Into the request.
  • the routing module is further configured to: after receiving an access request to the primary core network, if receiving an access response message returned by the primary core network, determining that the primary core network is accessed by the terminal Core Network.
  • the routing module is further configured to: if the access request does not carry the core network identifier to be matched and/or carry the core network identifier to be matched but does not match the routable core network according to the core network identifier, and When the primary core network is not routable, an access request is sent to the secondary core network routable by the mobile network.
  • the access request received by the receiving module carries a field indicating a core network identifier; when the core network identifier in the field is valid, the routing module determines that the access request carries a core network identifier to be matched; When the core network identifier in the field is invalid, the routing module does not carry the core network identifier to be matched; or
  • the access request received by the receiving module carries a first field indicating whether a core network identifier needs to be matched and a second field indicating a core network identifier; the routing module indicates that the core network identifier needs to be matched in the first field, and the second When the core network identifier in the field is valid, determining that the access request carries the core network identifier to be matched; the routing module indicates that the first field indicates that the core network identifier does not need to be matched or the core network identifier in the second field is invalid. Determining that the access request does not carry a core network identifier to be matched.
  • a terminal access method is applied to a primary core network in a mobile network including multiple core networks, and the method includes:
  • the main core network according to the corresponding relationship between the configured user identification information and the plurality of core networks, Finding a core network corresponding to the user identifier information;
  • the primary core network returns a redirect message to the base station, where the redirect message carries the identifier information of the found core network to indicate that the terminal accesses the core network.
  • the method further includes:
  • the primary core network returns an access response message to the base station.
  • the primary core network and the other core networks of the mobile network are not in communication with each other, or although they are connected, there is no load sharing relationship.
  • a primary core network in a mobile network comprising a primary core network and a secondary core network, the primary core network comprising:
  • the configuration module is configured to: configure a correspondence between the user identification information and the plurality of core networks;
  • the receiving module is configured to: receive an access request sent by the base station, and obtain user identification information from the access request;
  • the response module is configured to: according to the correspondence between the user identifier information configured by the configuration module and the plurality of core networks, search for a core network corresponding to the user identifier information, and if the found core network is a secondary core network, The base station returns a redirect message, where the redirect message carries the identifier information of the secondary core network to indicate that the terminal accesses the secondary core network.
  • the response module is further configured to: if the found core network is the primary core network, return an access response message to the base station.
  • a terminal access method is applied to a terminal, and the method includes:
  • the terminal generates an access request, where the access request includes a field indicating a mobile network identifier, a field indicating a user identifier, and a field indicating core network information;
  • the terminal sends the access request to a base station.
  • the field indicating the core network information includes a first field indicating whether a core network identifier needs to be matched, and a second field indicating a core network identifier; or
  • the field representing the core network information includes a field indicating the identity of the core network.
  • a terminal comprising:
  • a generating module configured to: generate an access request, where the access request includes a field indicating a mobile network identifier, a field indicating a user identifier, and a field indicating core network information;
  • the sending module is configured to: send the access request to the base station.
  • the field indicating the core network information includes a first field indicating whether the core network identifier needs to be matched and a second field indicating the core network identifier; or the field indicating the core network information includes a field indicating the core network identifier.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions that implement a terminal access method applied to a base station when the computer executable instructions are executed.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented to implement a terminal access method applied to a primary core network.
  • an embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and when the computer executable instructions are executed, a terminal access method applied to the terminal is implemented.
  • the foregoing solution solves the problem of how the terminal accesses the specific core network belonging to the same when the same mobile network includes multiple core networks, and can handle various situations such as the access request without the core network identifier, and can also increase the routing. Compatible processing in case of failure, improving access success rate.
  • FIG. 1 is a flowchart of a method for accessing a terminal applied to a base station according to Embodiment 1 of the present invention
  • FIG. 2 is a block diagram of a base station according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of a method for accessing a terminal applied to a primary core network according to Embodiment 2 of the present invention
  • FIG. 4 is a block diagram of a main core network according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of a terminal access method applied to a terminal according to Embodiment 3 of the present invention.
  • FIG. 6 is a block diagram of a terminal according to Embodiment 3 of the present invention.
  • FIG. 7 is a flowchart of an application example 1 of an embodiment of the present invention.
  • FIG. 9 is a flowchart of the operation of the third application example of the embodiment of the present invention.
  • the embodiment provides a terminal access method, which is applied to a base station that is connected to at least one core network of a mobile network, where a core network with a redirection function is configured as a main core network, and other core networks. Configured as a secondary core network.
  • the primary core network is configured with one, but not limited to, for example, there may be two load balancing primary core networks, and one primary core network may be selected to send an access request when redirection is required.
  • the method includes the following steps:
  • Step 110 The base station receives an access request sent by the terminal to access the mobile network.
  • Step 120 If the access request does not carry the core network identifier to be matched, and the primary core network is routable, the base station sends an access request to the primary core network.
  • Step 130 If receiving a redirect message returned by the primary core network and the core network indicated therein is routable, the base station resends the access request to the indicated core network.
  • the method further includes: if the access request carries the core network identifier to be matched, and matches the routable according to the core network identifier.
  • the core network the base station sends an access request to the matched core network.
  • the method further includes: if the access request carries the core network identifier to be matched but cannot match according to the core network identifier. a core network of the route, and the primary core network is routable, the base station sends an access request to the primary core network; if the redirect message returned by the primary core network is received, and the core network indicated therein is routable, The base station resends the access request to the indicated core network.
  • the method further includes: receiving an access response message returned by the primary core network, where the base station determines that the primary core network is the terminal accessing Core network.
  • the method further includes: if the access request does not carry the core network identifier to be matched and/or carries the core network identifier to be matched However, according to the core network identifier, the routable core network is not matched, and the primary core network is not routable, and the base station sends an access request to the secondary core network routable by the mobile network.
  • the access request carries a field indicating a core network identifier; if the core network identifier in the field is valid, the base station determines that the access request carries a core network identifier to be matched; If the identifier is invalid, the base station determines that the access request does not carry the core network identifier to be matched; or
  • the access request carries a first field indicating whether a core network identifier needs to be matched and a second field indicating a core network identifier; if the first field indicates that the core network identifier needs to be matched and the core network identifier in the second field is valid, Determining, by the base station, that the access request carries a core network identifier to be matched; if the first field indicates that the core network identifier does not need to be matched or the core network identifier in the second field is invalid, the base station determines that the access request does not carry a to-be-matched Core network identity.
  • the plurality of core networks of the mobile network are not connected to each other, or multiple core networks of the mobile network are connected but there is no load sharing relationship.
  • the embodiment further provides a base station, at least with multiple core networks of a mobile network. Connection, as shown in FIG. 2, the base station includes:
  • the configuration module 10 is configured to: configure a core network having a redirection function in the plurality of core networks as a primary core network, and configure other core networks as a secondary core network, and manage routes of the multiple core networks;
  • the receiving module 20 is configured to: receive an access request sent by the terminal to access the mobile network;
  • the routing module 30 is configured to: when the access request does not carry the core network identifier to be matched, and the primary core network is routable, send an access request to the primary core network; if the primary core is received The redirect message returned by the network and the core network indicated in the redirect message is routable, and the access request is resent to the indicated core network.
  • the routing module 30 is further configured to: when the access request carries a core network identifier to be matched and matches the core network identifier to the routable core network, send the access to the matched core network. request.
  • the routing module 30 is further configured to: when the access request carries a core network identifier to be matched but does not match the routable core network according to the core network identifier, and the primary core network is routable, The primary core network sends an access request; if the redirect message returned by the primary core network is received and the core network indicated in the redirect message is routable, the base station retransmits the indicated core network Into the request.
  • the routing module 30 is further configured to: after receiving an access request to the primary core network, if receiving an access response message returned by the primary core network, determining that the primary core network is the terminal accessing Core network.
  • the routing module 30 is further configured to: if the access request does not carry the core network identifier to be matched and/or carry the core network identifier to be matched but does not match the routable core network according to the core network identifier, And when the primary core network is not routable, an access request is sent to the secondary core network routable by the mobile network.
  • the access request received by the receiving module 20 carries a field indicating a core network identifier.
  • the routing module 30 determines that the access request carries a core network identifier to be matched when the core network identifier in the field is valid. When the core network identifier in the field is invalid, the routing module 30 determines that the access request does not carry the core network identifier to be matched; or
  • the access request received by the receiving module 20 carries a first field indicating whether a core network identifier needs to be matched and a second field indicating a core network identifier; the routing module 30 indicates that the core network identifier needs to be matched in the first field.
  • the routing module 30 indicates in the first field that the core network identifier in the second field does not need to be matched or When it is invalid, it is determined that the access request does not carry the core network identifier to be matched.
  • an embodiment of the present invention further provides a base station, including a processor and a memory, where the processor stores instructions executable by the processor, and when the instruction is executed by the processor, executing the configuration module 10, the receiving module 20, and the routing module. 30 features.
  • This embodiment provides a terminal access method, which is applied to a primary core network in a mobile network including multiple core networks. As shown in FIG. 3, the method includes the following steps:
  • Step 210 The primary core network receives an access request sent by the base station, and obtains user identification information from the access request.
  • Step 220 The primary core network searches for a core network corresponding to the user identifier information according to the corresponding relationship between the configured user identifier information and the multiple core networks.
  • Step 230 If the found core network is another core network, the primary core network returns a redirect message to the base station, where the redirect message carries the identifier information of the found core network to indicate that the terminal accesses the core. network.
  • the method further includes: if the found core network is the primary core network, the primary core network returns an access response message to the base station.
  • the primary core network and the other core networks of the mobile network are not in communication with each other, or although they are connected, there is no load sharing relationship.
  • the embodiment also provides a primary core network in a mobile network, where the mobile network includes a primary core network and a secondary core network.
  • the primary core network includes:
  • the configuration module 40 is configured to: configure a correspondence between the user identification information and the plurality of core networks;
  • the receiving module 50 is configured to: receive an access request sent by the base station, and obtain user identification information from the access request;
  • the response module 60 is configured to: according to the correspondence between the user identifier information configured by the configuration module 40 and the plurality of core networks, search for a core network corresponding to the user identifier information, for example, the found core network is another core network. Redirecting a redirect message to the base station, where the redirect message carries the identified identity information of the core network to indicate that the terminal accesses the core network.
  • the response module 60 is further configured to: if the found core network is the primary core network, return an access response message to the base station.
  • This embodiment provides a terminal access method, which is applied to a terminal. As shown in FIG. 5, the method includes the following steps:
  • Step 310 The terminal generates an access request, where the access request includes a field indicating a mobile network identifier, a field indicating a user identifier, and a field indicating core network information.
  • Step 320 The terminal sends the access request to a base station.
  • the field indicating the core network information includes a first field indicating whether the core network identifier needs to be matched and a second field indicating the core network identifier; or the field indicating the core network information includes a field indicating the core network identifier.
  • the embodiment further provides a terminal, as shown in FIG. 6, comprising:
  • the generating module 70 is configured to: generate an access request, where the access request includes a representation a field of the mobile network identifier, a field indicating the user identifier, and a field indicating the core network information;
  • the sending module 80 is configured to: send the access request to the base station.
  • the field indicating the core network information includes a first field indicating whether the core network identifier needs to be matched and a second field indicating the core network identifier; or the field indicating the core network information includes a field indicating the core network identifier.
  • an embodiment of the present invention further provides a terminal, including a processor and a memory, where the processor stores instructions executable by the processor, and when the instructions are executed by the processor, performs the functions of the generating module 70 and the sending module 80.
  • the terminal carries the PLMN identifier, the user identifier information, and the indication information that does not need to match the core network identifier in the access request sent to the base station;
  • the PLMN identity is used to indicate the mobile network requesting access.
  • the base station can be configured with one or more PLMNs (other mobile networks). This example assumes that the PLMN that the terminal requests to access has multiple core networks, and the multiple core networks do not have a load sharing relationship. Only the corresponding core network can communicate normally.
  • the access request carries a first field indicating whether a core network identifier needs to be matched, and a second field indicating a core network identifier, where the value of the first field indicates that the core network identifier does not need to be matched, and the identifier can be determined at this time.
  • the access request does not carry the core network identifier to be matched. If the value of the first field indicates that the core network identifier needs to be matched, but the core network identifier in the second field is invalid as the agreed invalid value (such as a null value), it is also determined that the access request does not carry the core network identifier to be matched.
  • the access request carries the core network identifier to be matched.
  • the access request may only carry a field indicating the identity of the core network. If the core network identifier in the field is valid, it is determined that the access request carries the core network identifier to be matched, and if not, the access is determined. The request does not carry the core network identifier to be matched.
  • the base station determines, according to the PLMN, the mobile network that the terminal requests to access. If the access request does not carry the core network identifier to be matched, it is determined whether the primary core network is routable. This example assumes that the routable route is successful, and the access request is sent to the primary core network.
  • the access fails.
  • Step 3 After receiving the access request, the primary core network searches for the configured user identification information according to the information of the user identification information (such as the International Mobile Subscriber Identification Number (IMSI), but not limited to this).
  • the information of the user identification information such as the International Mobile Subscriber Identification Number (IMSI), but not limited to this.
  • IMSI International Mobile Subscriber Identification Number
  • the primary core network sends a redirect message to the base station.
  • the redirect message carries an identifier of the secondary core network to indicate that the terminal accesses the secondary core network;
  • Step 4 After receiving the redirect message, the base station determines that the core network indicated therein (which may be a secondary core network, when there are multiple primary core networks, or another primary core network) may be routed to the secondary core.
  • the network resends the access request to complete the access procedure.
  • the terminal, the base station, and the secondary core network interact to complete the access.
  • the terminal carries the PLMN identifier, the user identifier information, the indication information that needs to match the core network identifier, and the core network identifier in the access request sent to the base station;
  • Step 2 After receiving the access request, the base station determines, according to the PLMN, the mobile network that the terminal requests to access, and when the access request carries the core network identifier to be matched, determines whether the core network that matches the core network identifier is available. Routing, this example assumes that the core network is a secondary core network (and possibly a primary core network) and the routing is successful, and an access request is sent to the secondary core network.
  • the core network is a secondary core network (and possibly a primary core network) and the routing is successful, and an access request is sent to the secondary core network.
  • step 3 the terminal, the base station, and the secondary core network interact to complete the access.
  • the terminal carries the PLMN identifier, the user identifier information, the indication information that needs to match the core network identifier, and the core network identifier in the access request sent to the base station;
  • the base station determines, according to the PLMN, the mobile network that the terminal requests to access. If the access request carries the core network identifier to be matched, it is determined whether the core network identifier matches the routable core network, and the example assumes that the matching fails, that is, the routing fails;
  • the core network with the core network identifier may not be found in the configuration information.
  • the base station determines whether the primary core network of the mobile network is routable. This example assumes that the routable route is successful, and the access request is sent to the primary core network.
  • Steps 4-6 the same as step 3-5 of the application example one.
  • This example is for a case where the core network identity does not need to be matched but the primary core network is not routable, and the base station can send an access request to the secondary core network.
  • the workflow for this example includes the following steps:
  • the terminal carries the PLMN identifier, the user identifier information, and the indication information that does not need to match the core network identifier in the access request sent to the base station;
  • the base station determines, according to the PLMN, the mobile network that the terminal requests to access, and determines whether the primary core network is routable when the access request does not carry the core network identifier to be matched.
  • non-routing that is, routing failure
  • the main core network may not be routed.
  • the primary core network may not be configured under the PLMN, or the link of the primary core network but the base station to the primary core network may be faulty.
  • step 3 the base station sends an access request to the secondary core network routable by the mobile network.
  • the access response is returned to the base station, and if the user is not the user, the notification of the matching failure may be returned, and the base station may continue to the office.
  • Other routable sub-core networks in the mobile network send access requests.
  • This example is for a core network that needs to match the core network identity but does not match the routable core, and the primary core network is also not routable.
  • the workflow for this example includes the following steps:
  • the terminal carries the PLMN identifier, the user identifier information, the indication information that needs to match the core network identifier, and the core network identifier in the access request sent to the base station;
  • the base station determines, according to the PLMN, the mobile network that the terminal requests to access, and when the access request carries the core network identifier to be matched, determines whether the core network identifier matches the routable Core network, this example assumes that the match fails and the route fails;
  • step 3 the base station determines whether the primary core network of the mobile network is routable, and the example assumes that the non-routable, that is, the routing fails again;
  • step 4 the base station sends an access request to the secondary core network routable by the mobile network.
  • the access response is returned to the base station, and if the user is not the user, the notification of the matching failure may be returned, and the base station may continue to the office.
  • Other routable sub-core networks in the mobile network send access requests.
  • the foregoing solution solves the problem of how the terminal accesses the specific core network belonging to the same when the same mobile network includes multiple core networks, and can handle various situations such as the access request without the core network identifier, and can also increase the routing. Compatible processing in case of failure, improving access success rate.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions that implement a terminal access method applied to a base station when the computer executable instructions are executed.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented to implement a terminal access method applied to a primary core network.
  • an embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and when the computer executable instructions are executed, a terminal access method applied to the terminal is implemented.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the embodiment of the present invention provides a terminal access method, a corresponding terminal, a base station, and a main core network, which solves the problem of how the terminal accesses a specific core network when the same mobile network includes multiple core networks, and access requests It can be processed in a variety of situations, such as without the core network identifier, and it can also increase the compatibility processing in the case of routing failures, and improve the access success rate.

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Abstract

一种终端接入方法，应用于至少与一移动网络的多个核心网连接的基站，所述多个核心网中具有重定向功能的核心网为主核心网，其他核心网为次核心网，所述方法包括：所述基站接收到终端发送的指示接入所述移动网络的接入请求；如所述接入请求未携带待匹配的核心网标识且所述主核心网可路由，所述基站向所述主核心网发送接入请求；如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。上述方法解决了同一移动网络包括多个核心网时，终端如何接入归属的特定核心网的问题。

Description

一种终端接入方法及相应的终端、基站和主核心网 技术领域
本申请涉及但不限于移动通信***，更具体地，涉及一种终端接入方法及相应的终端、基站和主核心网。
背景技术
第三代伙伴计划(3GPP)长期演进(LTE)网络共享方案分为同PLMN(Public Land Mobile Network，公共陆地移动网络)和不同PLMN两种情况。对于不同PLMN的网络共享，意味着基站连接的是两个或多个核心网网络，终端接入时会将选择的PLMN带到基站，然后基站再根据选择的PLMN来确定终端接入的核心网(对LTE网络是要确定接入的MME)；同PLMN的网络共享，表示基站连接的是一个移动网络，基站连接的不同核心网(对LTE网络是连接不同的MME)在该移动网络内为“负荷分担”的关系，即当用户接入时，不论基站选择PLMN匹配范围内的哪个核心网，都可以正常建立业务。
但是一些特殊应用场景下，如集群行业用户网络与集群运营商网络共享时，存在特殊需求，此时虽然多个核心网共用一个PLMN，但多个核心网互不相通，更不存在负荷分担关系。目前标准中的网络共享方案没有提供针对这种场景的终端接入方案。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
有鉴于此，本发明实施例提供了以下技术方案。
一种终端接入方法，应用于至少与一移动网络的多个核心网连接的基站，所述多个核心网中具有重定向功能的核心网为主核心网，其他核心网为次核心网，所述方法包括：
所述基站接收到终端发送的指示接入所述移动网络的接入请求；
如所述接入请求未携带待匹配的核心网标识且所述主核心网可路由，所述基站向所述主核心网发送接入请求；
如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
可选地，
所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：如所述接入请求携带待匹配的核心网标识且根据所述核心网标识匹配到可路由的核心网，所述基站向匹配到的所述核心网发送接入请求。
可选地，
所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：
如所述接入请求携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网可路由，所述基站向所述主核心网发送接入请求；
如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
可选地，
所述基站向所述主核心网发送接入请求之后，该方法还包括：
如接收到所述主核心网返回的接入应答消息，所述基站确定所述主核心网为所述终端接入的核心网。
可选地，
所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：
如所述接入请求未携带待匹配的核心网标识和/或携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网不可路由，所述基站向所述移动网络可路由的次核心网发送接入请求。
可选地，
所述接入请求中携带表示核心网标识的字段；如所述字段中的核心网标识有效，所述基站确定所述接入请求携带待匹配的核心网标识；如所述字段中的核心网标识无效，所述基站确定所述接入请求未携带待匹配的核心网标识；或者，
所述接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；如第一字段表示需要匹配核心网标识且第二字段中的核心网标识有效，所述基站确定所述接入请求携带待匹配的核心网标识；如第一字段表示无需匹配核心网标识或者第二字段中的核心网标识无效，所述基站确定所述接入请求未携带待匹配的核心网标识。
可选地，
所述移动网络的多个核心网互不相通，或者，所述移动网络的多个核心网相通但不存在负荷分担关系。
一种基站，至少与一移动网络的多个核心网连接，包括：
配置模块，设置为：将所述多个核心网中具有重定向功能的核心网配置为主核心网，其它核心网配置为次核心网，并管理所述多个核心网的路由；
接收模块，设置为：接收终端发送的指示接入所述移动网络的接入请求；
选路模块，设置为：在所述接入请求未携带待匹配的核心网标识且所述主核心网可路由时，向所述主核心网发送接入请求；如收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，向所述指示的核心网重新发送接入请求。
可选地，
所述选路模块还设置为：在所述接入请求携带待匹配的核心网标识且根据所述核心网标识匹配到可路由的核心网时，向匹配到的所述核心网发送接入请求。
可选地，
所述选路模块还设置为：在所述接入请求携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网可路由时，向 所述主核心网发送接入请求；如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
可选地，
所述选路模块还设置为：在向所述主核心网发送接入请求之后，如接收到所述主核心网返回的接入应答消息，确定所述主核心网为所述终端接入的核心网。
可选地，
所述选路模块还设置为：在所述接入请求未携带待匹配的核心网标识和/或携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网不可路由时，向所述移动网络可路由的次核心网发送接入请求。
可选地，
所述接收模块接收的接入请求中携带表示核心网标识的字段；所述选路模块在所述字段中的核心网标识有效时，确定所述接入请求携带待匹配的核心网标识；所述选路模块在所述字段中的核心网标识无效时，确定所述接入请求未携带待匹配的核心网标识；或者，
所述接收模块接收的接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；所述选路模块在第一字段表示需要匹配核心网标识且第二字段中的核心网标识有效时，确定所述接入请求携带待匹配的核心网标识；所述选路模块在第一字段表示无需匹配核心网标识或者第二字段中的核心网标识无效时，确定所述接入请求未携带待匹配的核心网标识。
一种终端接入方法，应用于包括多个核心网的移动网络中的主核心网，所述方法包括：
所述主核心网接收到基站发送的接入请求，从所述接入请求中获取用户标识信息；
所述主核心网根据配置的用户标识信息与所述多个核心网的对应关系， 查找所述用户标识信息对应的核心网；
如查找到的核心网为其他核心网，所述主核心网向所述基站返回重定向消息，所述重定向消息携带查找到的核心网的标识信息以指示终端接入所述核心网。
可选地，
所述主核心网查找所述用户标识信息对应的核心网之后，该方法还包括：
如查找到的核心网为所述主核心网，所述主核心网向所述基站返回接入应答消息。
可选地，
所述主核心网与所述移动网络的其他核心网互不相通，或者虽然相通但不存在负荷分担关系。
一种移动网络中的主核心网，所述移动网络包括主核心网和次核心网，所述主核心网包括：
配置模块，设置为：配置用户标识信息与所述多个核心网的对应关系；
接收模块，设置为：接收基站发送的接入请求，从所述接入请求中获取用户标识信息；
响应模块，设置为：根据所述配置模块配置的用户标识信息与所述多个核心网的对应关系，查找所述用户标识信息对应的核心网，如查找到的核心网为次核心网，向所述基站返回重定向消息，其中，所述重定向消息携带所述次核心网的标识信息以指示终端接入所述次核心网。
可选地，
所述响应模块还设置为：如查找到的核心网为所述主核心网，则向所述基站返回接入应答消息。
一种终端接入方法，应用于终端，所述方法包括：
终端生成接入请求，所述接入请求包括表示移动网络标识的字段、表示用户标识的字段及表示核心网信息的字段；
所述终端向基站发送所述接入请求。
可选地，
所述表示核心网信息的字段包括表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；或者，
所述表示核心网信息的字段包括表示核心网标识的字段。
一种终端，包括：
生成模块，设置为：生成接入请求，其中，所述接入请求包括表示移动网络标识的字段、表示用户标识的字段及表示核心网信息的字段；
发送模块，设置为：向基站发送所述接入请求。
其中，所述表示核心网信息的字段包括表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；或者，所述表示核心网信息的字段包括表示核心网标识的字段。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于基站的终端接入方法。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于主核心网的终端接入方法。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于终端的终端接入方法。
上述方案解决了同一移动网络包括多个核心网时，终端如何接入归属的特定核心网的问题，对接入请求带不带核心网标识等多种情况都可以处理，并且还可以增加选路失败情况下的兼容处理，提高接入成功率。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1是本发明实施例一的应用于基站的终端接入方法的流程图；
图2是本发明实施例一的基站的模块图；
图3是本发明实施例二的应用于主核心网的终端接入方法的流程图；
图4是本发明实施例二的主核心网的模块图；
图5是本发明实施例三的应用于终端的终端接入方法的流程图；
图6是本发明实施例三的终端的模块图；
图7是本发明实施例的应用示例一的工作流程图；
图8是本发明实施例的应用示例二的工作流程图；
图9是本发明实施例的应用示例三的工作流程图。
本发明的实施方式
下文中将结合附图对本发明的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
实施例一
本实施例提供一种终端接入方法，应用于至少与一移动网络的多个核心网连接的基站，所述多个核心网中具有重定向功能的核心网配置为主核心网，其他核心网配置为次核心网。本实施例中，主核心网配置一个但不局限于此，如可以存在两个负荷分担的主核心网，在需要重定向时选择一个主核心网发送接入请求即可。
如图1所示，所述方法包括以下步骤：
步骤110，基站接收到终端发送的指示接入所述移动网络的接入请求；
步骤120，如接入请求未携带待匹配的核心网标识且所述主核心网可路由，基站向所述主核心网发送接入请求；
步骤130，如接收到主核心网返回的重定向消息且其中指示的核心网可路由，基站向所述指示的核心网重新发送接入请求。
可选地，
所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：如所述接入请求携带待匹配的核心网标识且根据所述核心网标识匹配到可路由的核心网，所述基站向匹配到的所述核心网发送接入请求。
可选地，
所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：如所述接入请求携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网可路由，所述基站向所述主核心网发送接入请求；如接收到所述主核心网返回的重定向消息且其中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
可选地，
所述基站向所述主核心网发送接入请求之后，该方法还包括：如接收到所述主核心网返回的接入应答消息，所述基站确定所述主核心网为所述终端接入的核心网。
可选地，
所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：如所述接入请求未携带待匹配的核心网标识和/或携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网不可路由，所述基站向所述移动网络可路由的次核心网发送接入请求。
可选地，
所述接入请求中携带表示核心网标识的字段；如所述字段中的核心网标识有效，所述基站确定所述接入请求携带待匹配的核心网标识；如所述字段中的核心网标识无效，所述基站确定所述接入请求未携带待匹配的核心网标识；或者，
所述接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；如第一字段表示需要匹配核心网标识且第二字段中的核心网标识有效，所述基站确定所述接入请求携带待匹配的核心网标识；如第一字段表示无需匹配核心网标识或者第二字段中的核心网标识无效，所述基站确定所述接入请求未携带待匹配的核心网标识。
可选地，
所述移动网络的多个核心网互不相通，或者，所述移动网络的多个核心网相通但不存在负荷分担关系。
相应地，本实施例还提供了一种基站，至少与一移动网络的多个核心网 连接，如图2所示，所述基站包括：
配置模块10，设置为：将所述多个核心网中具有重定向功能的核心网配置为主核心网，其它核心网配置为次核心网，并管理所述多个核心网的路由；
接收模块20，设置为：接收终端发送的指示接入所述移动网络的接入请求；
选路模块30，设置为：在所述接入请求未携带待匹配的核心网标识且所述主核心网可路由时，向所述主核心网发送接入请求；如收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，向所述指示的核心网重新发送接入请求。
可选地，
所述选路模块30还设置为：在所述接入请求携带待匹配的核心网标识且根据所述核心网标识匹配到可路由的核心网时，向匹配到的所述核心网发送接入请求。
可选地，
所述选路模块30还设置为：在所述接入请求携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网可路由时，向所述主核心网发送接入请求；如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
可选地，
所述选路模块30还设置为：在向所述主核心网发送接入请求之后，如接收到所述主核心网返回的接入应答消息，确定所述主核心网为所述终端接入的核心网。
可选地，
所述选路模块30还设置为：在所述接入请求未携带待匹配的核心网标识和/或携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网不可路由时，向所述移动网络可路由的次核心网发送接入请求。
可选地，
所述接收模块20接收的接入请求中携带表示核心网标识的字段；所述选路模块30在所述字段中的核心网标识有效时，确定所述接入请求携带待匹配的核心网标识；所述选路模块30在所述字段中的核心网标识无效时，确定所述接入请求未携带待匹配的核心网标识；或者，
所述接收模块20接收的接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；所述选路模块30在第一字段表示需要匹配核心网标识且第二字段中的核心网标识有效时，确定所述接入请求携带待匹配的核心网标识；所述选路模块30在第一字段表示无需匹配核心网标识或者第二字段中的核心网标识无效时，确定所述接入请求未携带待匹配的核心网标识。
此外，本发明实施例还提供一种基站，包括处理器和存储器，存储器中存储有处理器可执行的指令，当指令被处理器执行时，执行上述配置模块10、接收模块20以及选路模块30的功能。
实施例二
本实施例提供一种终端接入方法，应用于包括多个核心网的移动网络中的主核心网，如图3所示，所述方法包括以下步骤：
步骤210，所述主核心网接收到基站发送的接入请求，从所述接入请求中获取用户标识信息；
步骤220，所述主核心网根据配置的用户标识信息与所述多个核心网的对应关系，查找所述用户标识信息对应的核心网；
步骤230，如查找到的核心网为其他核心网，所述主核心网向所述基站返回重定向消息，所述重定向消息携带查找到的核心网的标识信息以指示终端接入所述核心网。
可选地，
所述主核心网查找所述用户标识信息对应的核心网之后，该方法还包括：如查找到的核心网为所述主核心网，所述主核心网向所述基站返回接入应答消息。
可选地，
所述主核心网与所述移动网络的其他核心网互不相通，或者虽然相通但不存在负荷分担关系。
本实施例还提供了一种移动网络中的主核心网，所述移动网络包括主核心网和次核心网，如图4所示，所述主核心网包括：
配置模块40，设置为：配置用户标识信息与所述多个核心网的对应关系；
接收模块50，设置为：接收基站发送的接入请求，从所述接入请求中获取用户标识信息；
响应模块60，设置为：根据所述配置模块40配置的用户标识信息与所述多个核心网的对应关系，查找所述用户标识信息对应的核心网，如查找到的核心网为其他核心网，向所述基站返回重定向消息，其中，所述重定向消息携带查找到的核心网的标识信息以指示终端接入所述核心网。
可选地，
所述响应模块60还设置为：如查找到的核心网为所述主核心网，则向所述基站返回接入应答消息。
实施例三
本实施例提供一种终端接入方法，应用于终端，如图5所示，所述方法包括以下步骤：
步骤310，终端生成接入请求，所述接入请求包括表示移动网络标识的字段、表示用户标识的字段及表示核心网信息的字段；
步骤320，所述终端向基站发送所述接入请求。
可选地，
所述表示核心网信息的字段包括表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；或者，所述表示核心网信息的字段包括表示核心网标识的字段。
相应地，本实施例还提供一种终端，如图6所示，包括：
生成模块70，设置为：生成接入请求，其中，所述接入请求包括表示移 动网络标识的字段、表示用户标识的字段及表示核心网信息的字段；
发送模块80，设置为：向基站发送所述接入请求。
其中，所述表示核心网信息的字段包括表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；或者，所述表示核心网信息的字段包括表示核心网标识的字段。
此外，本发明实施例还提供一种终端，包括处理器和存储器，存储器中存储有处理器可执行的指令，当指令被处理器执行时，执行上述生成模块70以及发送模块80的功能。
下面再用几个应用示例进行说明。
应用示例一
本示例的工作流程如图7所示，包括以下步骤：
第1步，终端在发送给基站的接入请求中携带PLMN标识、用户标识信息及不需要匹配核心网标识的指示信息；
其中，PLMN标识用于表示请求接入的移动网络。基站可以配置一个或多个PLMN(也可以是其他移动网络)，本示例假定终端请求接入的PLMN有多个核心网且所述多个核心网不存在负荷分担关系，也即终端只能接入其对应的核心网才能够正常通信。
本示例中，接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段，其中，第一字段的值表示不需要匹配核心网标识，此时即可确定接入请求未携带待匹配的核心网标识。如果第一字段的值表示需要匹配核心网标识，但第二字段中的核心网标识无效如为约定的无效值(如空值)，也确定接入请求未携带待匹配的核心网标识。在第一字段的值表示需要匹配核心网标识且第二字段中的核心网标识有效如非约定的无效值时，才确定接入请求携带待匹配的核心网标识。
在另一示例中，接入请求中可以只携带表示核心网标识的字段，如果该字段中的核心网标识有效，则确定接入请求携带待匹配的核心网标识，如果无效，则确定接入请求未携带待匹配的核心网标识。
第2步，基站收到接入请求后，根据PLMN确定终端请求接入的移动网 络，在所述接入请求未携带待匹配的核心网标识时，判断所述主核心网是否可路由，本示例假定可路由即选路成功，此时向主核心网发送接入请求；
如果基站没有查找到与所述PLMN标识匹配的移动网络，则接入失败。
第3步，主核心网收到接入请求后，根据用户标识信息(如国际移动用户识别码(IMSI，International Mobile Subscriber Identification Number)号段但不限于此)等信息，查找配置的用户标识信息与所述移动网络的多个核心网的对应关系(如号段与核心网的对应关系)，本示例假定查找到的核心网为次核心网，主核心网发送重定向消息带给基站，所述重定向消息携带所述次核心网的标识以指示终端接入所述次核心网；
第4步，基站收到重定向消息后，判断其中指示的核心网(可以是次核心网，有多个主核心网时，也可以是另一主核心网)可路由，向所述次核心网重新发送接入请求以完成接入流程。
第5步，终端、基站和所述次核心网交互完成接入。
应用示例二
本示例的工作流程如图8所示，包括以下步骤：
第1步，终端在发送给基站的接入请求中携带PLMN标识、用户标识信息、需要匹配核心网标识的指示信息及核心网标识；
第2步，基站收到接入请求后，根据PLMN确定终端请求接入的移动网络，在所述接入请求携带待匹配的核心网标识时，判断所述核心网标识匹配的核心网是否可路由，本示例假定该核心网为次核心网(也可能是主核心网)且可路由即选路成功，此时向所述次核心网发送接入请求；
第3步，终端、基站和所述次核心网交互以完成接入。
应用示例三
本示例的工作流程如图9所示，包括以下步骤：
第1步，终端在发送给基站的接入请求中携带PLMN标识、用户标识信息、需要匹配核心网标识的指示信息及核心网标识；
第2步，基站收到接入请求后，根据PLMN确定终端请求接入的移动网 络，在所述接入请求携带待匹配的核心网标识时，判断所述核心网标识是否匹配到可路由的核心网，本示例假定匹配不到即选路失败；
匹配不到可路由的核心网，可能是从配置信息中查找不到所述移动网络下的具有该核心网标识的核心网，也可能是查找到的核心网不可路由。
第3步，基站判断所述移动网络的主核心网是否可路由，本示例假定可路由即选路成功，此时向主核心网发送接入请求；
第4-6步，同应用示例一的第3-5步。
应用示例四
本示例针对不需要匹配核心网标识但主核心网不可路由的情况，基站可以向次核心网发送接入请求。
本示例的工作流程包括以下步骤：
第1步，终端在发送给基站的接入请求中携带PLMN标识、用户标识信息及不需要匹配核心网标识的指示信息；
第2步，基站收到接入请求后，根据PLMN确定终端请求接入的移动网络，在所述接入请求未携带待匹配的核心网标识时，判断所述主核心网是否可路由，本示例假定不可路由即选路失败；
主核心网不可路由可能是该PLMN下没有配置主核心网，也可能是配置了主核心网但基站到该主核心网的链路故障。
第3步，基站向所述移动网络可路由的次核心网发送接入请求。
如果次核心网根据接入请求中的用户标识信息判断该用户是自己服务的用户，会向基站返回接入响应，如果不是自己服务的用户，可以返回匹配失败的通知，基站还可以继续向所述移动网络中其他可路由的次核心网发送接入请求。
应用示例五
本示例针对需要匹配核心网标识但匹配不到可路由的核心网，且主核心网也不可路由的情况。
本示例的工作流程包括以下步骤：
第1步，终端在发送给基站的接入请求中携带PLMN标识、用户标识信息、需要匹配核心网标识的指示信息及核心网标识；
第2步，基站收到接入请求后，根据PLMN确定终端请求接入的移动网络，在所述接入请求携带待匹配的核心网标识时，判断所述核心网标识是否匹配到可路由的核心网，本示例假定匹配不到即选路失败；
第3步，基站判断所述移动网络的主核心网是否可路由，本示例假定不可路由即选路再次失败；
第4步，基站向所述移动网络可路由的次核心网发送接入请求。
如果次核心网根据接入请求中的用户标识信息判断该用户是自己服务的用户，会向基站返回接入响应，如果不是自己服务的用户，可以返回匹配失败的通知，基站还可以继续向所述移动网络中其他可路由的次核心网发送接入请求。
上述方案解决了同一移动网络包括多个核心网时，终端如何接入归属的特定核心网的问题，对接入请求带不带核心网标识等多种情况都可以处理，并且还可以增加选路失败情况下的兼容处理，提高接入成功率。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于基站的终端接入方法。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于主核心网的终端接入方法。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于终端的终端接入方法。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘) 中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本申请不限制于任何特定形式的硬件和软件的结合。
以上仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。
工业实用性
本发明实施例提供一种终端接入方法及相应的终端、基站和主核心网，解决了同一移动网络包括多个核心网时，终端如何接入归属的特定核心网的问题，对接入请求带不带核心网标识等多种情况都可以处理，并且还可以增加选路失败情况下的兼容处理，提高接入成功率。

Claims (25)

  1. 一种终端接入方法，应用于至少与一移动网络的多个核心网连接的基站，所述多个核心网中具有重定向功能的核心网为主核心网，其他核心网为次核心网，所述方法包括：
    所述基站接收到终端发送的指示接入所述移动网络的接入请求；
    如所述接入请求未携带待匹配的核心网标识且所述主核心网可路由，所述基站向所述主核心网发送接入请求；
    如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
  2. 如权利要求1所述的方法，所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：如所述接入请求携带待匹配的核心网标识且根据所述核心网标识匹配到可路由的核心网，所述基站向匹配到的所述核心网发送接入请求。
  3. 如权利要求2所述的方法，所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：
    如所述接入请求携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网可路由，所述基站向所述主核心网发送接入请求；
    如接收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
  4. 如权利要求1或2或3所述的方法，所述基站向所述主核心网发送接入请求之后，该方法还包括：
    如接收到所述主核心网返回的接入应答消息，所述基站确定所述主核心网为所述终端接入的核心网。
  5. 如权利要求1所述的方法，所述基站接收到终端发送的指示接入所述移动网络的接入请求之后，该方法还包括：
    如所述接入请求未携带待匹配的核心网标识和/或携带待匹配的核心网 标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网不可路由，所述基站向所述移动网络可路由的次核心网发送接入请求。
  6. 如权利要求1或2或3或5所述的方法，其中，
    所述接入请求中携带表示核心网标识的字段；如所述字段中的核心网标识有效，所述基站确定所述接入请求携带待匹配的核心网标识；如所述字段中的核心网标识无效，所述基站确定所述接入请求未携带待匹配的核心网标识；或者，
    所述接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；如第一字段表示需要匹配核心网标识且第二字段中的核心网标识有效，所述基站确定所述接入请求携带待匹配的核心网标识；如第一字段表示无需匹配核心网标识或者第二字段中的核心网标识无效，所述基站确定所述接入请求未携带待匹配的核心网标识。
  7. 如权利要求1所述的方法，其中，所述移动网络的多个核心网互不相通，或者，所述移动网络的多个核心网相通但不存在负荷分担关系。
  8. 一种基站，至少与一移动网络的多个核心网连接，包括：
    配置模块，设置为：将所述多个核心网中具有重定向功能的核心网配置为主核心网，其它核心网配置为次核心网，并管理所述多个核心网的路由；
    接收模块，设置为：接收终端发送的指示接入所述移动网络的接入请求；
    选路模块，设置为：在所述接入请求未携带待匹配的核心网标识且所述主核心网可路由时，向所述主核心网发送接入请求；如收到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，向所述指示的核心网重新发送接入请求。
  9. 如权利要求8所述的基站，其中，所述选路模块还设置为：在所述接入请求携带待匹配的核心网标识且根据所述核心网标识匹配到可路由的核心网时，向匹配到的所述核心网发送接入请求。
  10. 如权利要求9所述的基站，其中，所述选路模块还设置为：在所述接入请求携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网可路由时，向所述主核心网发送接入请求；如接收 到所述主核心网返回的重定向消息且所述重定向消息中指示的核心网可路由，所述基站向所述指示的核心网重新发送接入请求。
  11. 如权利要求8或9或10所述的基站，其中，所述选路模块还设置为：在向所述主核心网发送接入请求之后，如接收到所述主核心网返回的接入应答消息，确定所述主核心网为所述终端接入的核心网。
  12. 如权利要求8所述的基站，其中，所述选路模块还设置为：在所述接入请求未携带待匹配的核心网标识和/或携带待匹配的核心网标识但根据所述核心网标识匹配不到可路由的核心网，且所述主核心网不可路由时，向所述移动网络可路由的次核心网发送接入请求。
  13. 如权利要求8或9或10或12所述的基站，其中，
    所述接收模块接收的接入请求中携带表示核心网标识的字段；所述选路模块在所述字段中的核心网标识有效时，确定所述接入请求携带待匹配的核心网标识；所述选路模块在所述字段中的核心网标识无效时，确定所述接入请求未携带待匹配的核心网标识；或者，
    所述接收模块接收的接入请求中携带表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；所述选路模块在第一字段表示需要匹配核心网标识且第二字段中的核心网标识有效时，确定所述接入请求携带待匹配的核心网标识；所述选路模块在第一字段表示无需匹配核心网标识或者第二字段中的核心网标识无效时，确定所述接入请求未携带待匹配的核心网标识。
  14. 一种终端接入方法，应用于包括多个核心网的移动网络中的主核心网，所述方法包括：
    所述主核心网接收到基站发送的接入请求，从所述接入请求中获取用户标识信息；
    所述主核心网根据配置的用户标识信息与所述多个核心网的对应关系，查找所述用户标识信息对应的核心网；
    如查找到的核心网为其他核心网，所述主核心网向所述基站返回重定向消息，所述重定向消息携带查找到的核心网的标识信息以指示终端接入所述 核心网。
  15. 如权利要求14所述的方法，所述主核心网查找所述用户标识信息对应的核心网之后，该方法还包括：
    如查找到的核心网为所述主核心网，所述主核心网向所述基站返回接入应答消息。
  16. 如权利要求14或15所述的方法，其中，所述主核心网与所述移动网络的其他核心网互不相通，或者虽然相通但不存在负荷分担关系。
  17. 一种移动网络中的主核心网，所述移动网络包括主核心网和次核心网，所述主核心网包括：
    配置模块，设置为：配置用户标识信息与所述多个核心网的对应关系；
    接收模块，设置为：接收基站发送的接入请求，从所述接入请求中获取用户标识信息；
    响应模块，设置为：根据所述配置模块配置的用户标识信息与所述多个核心网的对应关系，查找所述用户标识信息对应的核心网，如查找到的核心网为次核心网，向所述基站返回重定向消息，其中，所述重定向消息携带所述次核心网的标识信息以指示终端接入所述次核心网。
  18. 如权利要求17所述的主核心网，其中，所述响应模块还设置为：如查找到的核心网为所述主核心网，则向所述基站返回接入应答消息。
  19. 一种终端接入方法，应用于终端，所述方法包括：
    终端生成接入请求，所述接入请求包括表示移动网络标识的字段、表示用户标识的字段及表示核心网信息的字段；
    所述终端向基站发送所述接入请求。
  20. 如权利要求19所述的方法，其中，
    所述表示核心网信息的字段包括表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；或者，
    所述表示核心网信息的字段包括表示核心网标识的字段。
  21. 一种终端，包括：
    生成模块，设置为：生成接入请求，其中，所述接入请求包括表示移动网络标识的字段、表示用户标识的字段及表示核心网信息的字段；
    发送模块，设置为：向基站发送所述接入请求。
  22. 根据权利要求21所述的终端，其中，所述表示核心网信息的字段包括表示是否需要匹配核心网标识的第一字段和表示核心网标识的第二字段；或者，所述表示核心网信息的字段包括表示核心网标识的字段。
  23. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现权利要求1至7任一项所述的方法。
  24. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现权利要求14至16任一项所述的方法。
  25. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现权利要求19至20任一项所述的方法。
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