WO2017045189A1 - 核心网选择方法、装置及系统 - Google Patents

核心网选择方法、装置及系统 Download PDF

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Publication number
WO2017045189A1
WO2017045189A1 PCT/CN2015/089929 CN2015089929W WO2017045189A1 WO 2017045189 A1 WO2017045189 A1 WO 2017045189A1 CN 2015089929 W CN2015089929 W CN 2015089929W WO 2017045189 A1 WO2017045189 A1 WO 2017045189A1
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WO
WIPO (PCT)
Prior art keywords
dcn
accessed
network device
information
type
Prior art date
Application number
PCT/CN2015/089929
Other languages
English (en)
French (fr)
Inventor
段小嫣
金辉
衣强
何岳
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP15903879.3A priority Critical patent/EP3340692B1/en
Priority to PCT/CN2015/089929 priority patent/WO2017045189A1/zh
Priority to CN201911129887.3A priority patent/CN111031592B/zh
Priority to EP20182759.9A priority patent/EP3799479B1/en
Priority to CN201580079458.3A priority patent/CN107534929B/zh
Priority to ES20182759T priority patent/ES2956842T3/es
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to ES15903879T priority patent/ES2822429T3/es
Priority to US15/760,897 priority patent/US10588074B2/en
Priority to EP23163857.8A priority patent/EP4262282A3/en
Publication of WO2017045189A1 publication Critical patent/WO2017045189A1/zh
Priority to US16/789,711 priority patent/US11272439B2/en
Priority to US17/583,373 priority patent/US11930448B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a core network selection method, apparatus, and system.
  • a network slicing method may be adopted, where multiple network fragments are formed into a network, where a single network fragment may be defined as a logical network functional entity supporting communication service requirements of a specific scenario. Collections, such as: network fragmentation that supports a large number of machine device communications, network fragmentation that supports mobile broadband services, and the like. Network fragmentation can be performed in multiple fragmentation modes. For example, the core network can be fragmented, the access network can be fragmented, and the core network and the access network can be fragmented together.
  • the Dedicated Core Network (DCN) defined by the 3rd Generation Partnership Project (3GPP) is a scheme for fragmenting the core network.
  • the core network device triggers the rerouting process of the access network device.
  • the core network control function entity receives the terminal request message sent by the access network device, for example, registration, location update request, etc., Determining whether it belongs to a specific DCN serving the access network device, and if not, the information of the specific DCN carrying the access network device requests the access network device to reroute the terminal request message to the specific DCN of the access network device.
  • the core network controls functional entities.
  • the embodiment of the invention provides a method, a device and a system for selecting a core network, so as to improve the accuracy of selecting the DCN of the access network device, avoiding the increase of the communication signaling and the processing delay caused by the DCN reselection process, and improving the communication efficiency.
  • an embodiment of the present invention provides a core network selection method, including:
  • the access network device Acquiring, by the access network device, the first dedicated core network DCN information, where the first DCN information includes Information of at least one DCN accessible by the access network device;
  • the first DCN information includes a type of the at least one DCN
  • the selecting, by the first DCN information, the DCN to be accessed from the at least one DCN includes:
  • the information about the DCN to be accessed is sent to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed, including:
  • the first DCN information includes a type of the at least one DCN, a DCN identification ID, and a priority
  • the selecting, by the first DCN information, the DCN to be accessed from the at least one DCN includes:
  • the information about the DCN to be accessed is sent to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed, including:
  • the acquiring the first DCN from the access network device Before the information also includes:
  • the obtaining the first DCN information from the access network device includes:
  • the first DCN information includes a type of the at least one DCN
  • the selecting, by the first DCN information, the DCN to be accessed from the at least one DCN includes:
  • the information about the DCN to be accessed is sent to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed, including:
  • the first DCN information includes a type of the at least one DCN
  • the selecting, by the first DCN information, the DCN to be accessed from the at least one DCN includes:
  • the information about the DCN to be accessed is sent to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed, including:
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the information about the DCN to be accessed is sent to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed, including:
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the selecting, by the first DCN information, the DCN to be accessed from the at least one DCN includes:
  • the information about the DCN to be accessed is sent to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed, including:
  • the acquiring the first DCN from the access network device Information including:
  • the method before the sending the information about the DCN to be accessed to the access network device, the method further includes:
  • a request is made to establish a wireless connection to the access network device.
  • the possible implementation of any one of the second to the ninth aspects of the first aspect in the tenth possible implementation manner of the first aspect, Determining the DCN to be accessed in the at least one DCN, further comprising:
  • the first DCN information is obtained from other access network devices.
  • an embodiment of the present invention provides a core network selection method, including:
  • the UE Transmitting the first dedicated core network DCN information to the user equipment UE, so that the UE selects the DCN to be accessed according to the first DCN information, where the first DCN information includes at least one DCN accessible by the access network device.
  • the information about the DCN to be accessed includes a type of the DCN to be accessed
  • Determining the core network device according to the information about the DCN to be accessed and the pre-configured second DCN information including:
  • the determining, according to the information about the DCN to be accessed, and the pre-configured second DCN information, determining a core network Equipment including:
  • the information about the DCN to be accessed includes the DCN ID of the DCN to be accessed;
  • Determining the core network device according to the information about the DCN to be accessed and the pre-configured DCN information including:
  • the determining, according to the information about the DCN to be accessed and the pre-configured DCN information, determining a core network device also includes:
  • any one of the first to the fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, before the sending the first DCN information to the UE, also includes:
  • the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the method further includes:
  • the sending the first DCN information to the UE includes:
  • an embodiment of the present invention provides a core network selection method, including:
  • the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the embodiment of the present invention provides a user equipment UE, including:
  • a receiving module configured to acquire, by the access network device, the first dedicated core network DCN information, where the first DCN information includes information of at least one DCN that the access network device can access;
  • a selecting module configured to select, according to the first DCN information, a DCN to be accessed from the at least one DCN;
  • a sending module configured to send the information about the DCN to be accessed to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed.
  • the first DCN information includes a type of the at least one DCN
  • the selecting module is specifically configured to select a type and a user equipment from the at least one DCN
  • the DCN matched by the service type of the UE is used as the DCN to be accessed;
  • the sending module is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the type of the DCN to be accessed. device.
  • the first DCN information includes a type of the at least one DCN, a DCN identification ID, and a priority
  • the selecting module is specifically configured to select, from the at least one DCN, one or more DCNs whose types match the service type of the UE; when there is a DCN type matching the service type, the DCN is Determining to be the DCN to be accessed; or, when there are multiple types of DCNs matching the service type, selecting the DCN to be accessed from the plurality of DCNs according to the priority;
  • the sending module is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • Core network equipment is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • the sending module is further configured to The access network device sends a first message, where the first message is used to indicate a DCN selection capability of the UE;
  • the receiving module is specifically configured to receive a second message that is sent by the access network device according to the first message, where the second message includes the first DCN information.
  • the first DCN information includes a type of the at least one DCN
  • the selecting module is specifically configured to determine, according to the first preset rule, a public land mobile network PLMN to be accessed, and select, from the at least one DCN supported by the PLMN to be accessed, a DCN whose type matches the service type of the UE.
  • the sending module is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the type of the DCN to be accessed. device.
  • the first DCN information includes a type of the at least one DCN
  • the selecting module is specifically configured to select a type and UE service from the at least one DCN
  • the type-matched DCN is used as the DCN to be accessed; and the PLMN to be accessed is determined according to the type of the DCN to be accessed;
  • the sending module is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the type of the DCN to be accessed. device.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the selecting module is specifically configured to determine, according to the first preset rule, a PLMN to be accessed, and select one or more DCNs of a type matching the service type of the UE from the at least one DCN supported by the PLMN to be accessed; Determining the one DCN as the DCN to be accessed when there is a DCN type matching the service type; or, when there are multiple DCN types matching the service type, according to the priority Selecting the DCN to be accessed from the plurality of DCNs;
  • the sending module is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • Core network equipment is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the selecting module is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the UE, and determine, according to the type of the DCN that matches the service type of the UE, the PLMN to be accessed; Determining, by the priority, the DCN with the highest priority from the at least one DCN supported by the PLMN to be accessed as the DCN to be accessed;
  • the sending module is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • Core network equipment is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • the receiving module is configured to receive the And a third message sent by the access network device, where the third message includes the first DCN information.
  • the sending module is further configured to: Request Establish a wireless connection.
  • the selecting module is further used to When there is no DCN of the type matching the service type in the at least one DCN, the preset default DCN is selected as the DCN to be accessed; or when there is no DCN in the at least one DCN that matches the service type. And sending, by the access network device, a termination access request; or, when there is no DCN of the type that matches the service type, the first DCN information is obtained from other access network devices.
  • an embodiment of the present invention provides an access network device, including:
  • a sending module configured to send the first dedicated core network DCN information to the user equipment UE, so that the UE selects a DCN to be accessed according to the first DCN information, where the first DCN information includes an access network device Information about at least one DCN entered;
  • a receiving module configured to receive information about the DCN to be accessed sent by the UE
  • a determining module configured to determine a core network device according to the information about the DCN to be accessed and the pre-configured second DCN information, and initiate a service request to the core network device.
  • the information about the DCN to be accessed includes a type of the DCN to be accessed
  • the determining module is specifically configured to determine, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed; according to the DCN functional entity
  • the group identifier and the second preset rule determine the core network device.
  • the determining module is further configured to: when the type of the DCN to be accessed and the second DCN information are not determined Determining, by the DCN functional entity group identifier corresponding to the type of the accessed DCN, a preset default core network device as the core network device; or, according to the type of the DCN to be accessed and the second When the DCN information does not determine the DCN functional entity group identifier corresponding to the type of the DCN to be accessed, the fourth message is sent to the UE, and the fourth message is used to terminate the access request.
  • the information about the DCN to be accessed includes the DCN ID of the DCN to be accessed;
  • the determining module is specifically configured to use, according to the DCN ID of the DCN to be accessed, and the second The DCN information determines a DCN functional entity group identifier corresponding to the DCN to be accessed; and determines the core network device according to the DCN functional entity group identifier and a second preset rule.
  • the determining module is further configured to: when, according to the DCN ID of the DCN to be accessed, When the second DCN information does not determine the DCN functional entity group identifier corresponding to the DCN ID of the DCN to be accessed, determining a default default core network device as the core network device; or, when When the DCN ID of the incoming DCN and the second DCN information do not determine the DCN functional entity group identifier corresponding to the DCN ID of the DCN to be accessed, sending a fourth message to the UE, the fourth message Used to terminate the access request.
  • the receiving module is further used for the core network
  • the device acquires the second DCN information, where the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the receiving module And the method is further configured to receive a first message sent by the UE, where the first message is used to indicate a DCN selection capability of the UE;
  • the sending module is specifically configured to send a second message to the UE according to the first message, where the second message includes the first DCN information.
  • the sending module is specifically configured to The UE sends a third message, where the third message includes the first DCN information.
  • an embodiment of the present invention provides a core network device, including:
  • a sending module configured to send, by the access network device, the second dedicated core network DCN information, so that the access network device determines the core network device according to the second DCN information;
  • a processing module configured to process a service request initiated by the access network device.
  • the second The DCN information includes at least one DCN type and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the seventh aspect of the present invention provides a user equipment UE, including:
  • a receiver configured to acquire first dedicated core network DCN information from an access network device, where the first DCN information includes information of at least one DCN accessible by the access network device;
  • a processor configured to select, according to the first DCN information, a DCN to be accessed from the at least one DCN;
  • a transmitter configured to send the information about the DCN to be accessed to the access network device, so that the access network device determines the core network device according to the information about the DCN to be accessed.
  • the first DCN information includes a type of the at least one DCN
  • the processor is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the user equipment UE as the DCN to be accessed;
  • the transmitter is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the type of the DCN to be accessed. device.
  • the first DCN information includes a type of the at least one DCN, a DCN identification ID, and a priority
  • the processor is specifically configured to select, from the at least one DCN, one or more DCNs whose type matches the service type of the UE; when there is a DCN type matching the service type, the DCN is Determining to be the DCN to be accessed; or, when there are multiple types of DCNs matching the service type, selecting the DCN to be accessed from the plurality of DCNs according to the priority;
  • the transmitter is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • Core network equipment
  • the transmitter is further configured to Access Network
  • the device sends a first message, where the first message is used to indicate a DCN selection capability of the UE;
  • the receiver is specifically configured to receive a second message that is sent by the access network device according to the first message, where the second message includes the first DCN information.
  • the first DCN information includes a type of the at least one DCN
  • the processor is specifically configured to determine, according to a first preset rule, a public land mobile network PLMN to be accessed, and select, from the at least one DCN supported by the PLMN to be accessed, a DCN whose type matches the service type of the UE.
  • the transmitter is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the type of the DCN to be accessed. device.
  • the first DCN information includes a type of the at least one DCN
  • the processor is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the UE as the DCN to be accessed, and determine, according to the type of the DCN to be accessed, the to-be-accessed PLMN;
  • the transmitter is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the type of the DCN to be accessed. device.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the processor is specifically configured to determine, according to a first preset rule, a PLMN to be accessed, and select, from the at least one DCN supported by the PLMN to be accessed, one or more DCNs that match a service type of the UE; Determining the one DCN as the DCN to be accessed when there is a DCN type matching the service type; or, when there are multiple DCN types matching the service type, according to the priority Selecting the DCN to be accessed from the plurality of DCNs;
  • the transmitter is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • Core network equipment
  • the first The DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the processor is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the UE, and determine, according to the type of the DCN that matches the service type of the UE, the PLMN to be accessed; Determining, by the priority, the DCN with the highest priority from the at least one DCN supported by the PLMN to be accessed as the DCN to be accessed;
  • the transmitter is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the according to the DCN ID of the DCN to be accessed.
  • Core network equipment
  • the receiver is configured to receive the And a third message sent by the access network device, where the third message includes the first DCN information.
  • the transmitter is further configured to be used in the access network device Request to establish a wireless connection.
  • the processor is further configured to When there is no DCN of the type matching the service type in the at least one DCN, the preset default DCN is selected as the DCN to be accessed; or when there is no DCN in the at least one DCN that matches the service type. And sending, by the access network device, a termination access request; or, when there is no DCN of the type that matches the service type, the first DCN information is obtained from other access network devices.
  • the eighth aspect of the present invention provides an access network device, including:
  • a transmitter configured to send the first dedicated core network DCN information to the user equipment UE, so that the UE selects a DCN to be accessed according to the first DCN information, where the first DCN information includes an access network device Information about at least one DCN entered;
  • a receiver configured to receive information about the DCN to be accessed sent by the UE
  • a processor configured to determine, according to the information about the DCN to be accessed and the pre-configured second DCN information, and initiate a service request to the core network device.
  • the information about the DCN to be accessed includes a type of the DCN to be accessed
  • the processor is configured to determine, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed; according to the DCN functional entity
  • the group identifier and the second preset rule determine the core network device.
  • the processor is further configured to: according to the type of the DCN to be accessed and the foregoing When the DCN information does not determine the DCN functional entity group identifier corresponding to the type of the DCN to be accessed, the preset default core network device is determined as the core network device; or, according to the to-be-accessed When the type of the DCN and the second DCN information does not determine the DCN functional entity group identifier corresponding to the type of the DCN to be accessed, the fourth message is sent to the UE, and the fourth message is used to terminate the connection. Into the request.
  • the information about the DCN to be accessed includes the DCN ID of the DCN to be accessed;
  • the processor is configured to determine, according to the DCN ID of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the DCN to be accessed; according to the DCN functional entity group
  • the identification and the second preset rule determine the core network device.
  • the processor is further configured to: when, according to the DCN ID of the DCN to be accessed, When the second DCN information does not determine the DCN functional entity group identifier corresponding to the DCN ID of the DCN to be accessed, determining a default default core network device as the core network device; or, when When the DCN ID of the incoming DCN and the second DCN information do not determine the DCN functional entity group identifier corresponding to the DCN ID of the DCN to be accessed, sending a fourth message to the UE, the fourth message Used to terminate the access request.
  • the receiver is further used for the slave network
  • the device acquires the second DCN information, where the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the receiver is further configured to receive a first message sent by the UE, where the first message is used to indicate a DCN of the UE Selection ability
  • the transmitter is specifically configured to send a second message to the UE according to the first message, where the second message includes the first DCN information.
  • the UE sends a third message, where the third message includes the first DCN information.
  • the ninth aspect, the embodiment of the present invention provides a core network device, including:
  • a transmitter configured to send, to the access network device, the second dedicated core network DCN information, so that the access network device determines the core network device according to the second DCN information;
  • a processor configured to process a service request initiated by the access network device.
  • the second DCN information includes a type of at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • an embodiment of the present invention provides a communication system, including: a user equipment UE, an access network device, and a core network device, where the UE adopts the fourth aspect, the first to the tenth aspects of the fourth aspect
  • the device according to any one of the possible implementation manners of the fifth aspect, the device according to any one of the first to the eighth aspects of the fifth aspect,
  • the core network device adopts a possible implementation manner of any one of the first to the second aspects of the sixth aspect and the sixth aspect.
  • an embodiment of the present invention provides a communication system, including: a user equipment UE, an access network device, and a core network device, where the UE adopts the seventh aspect, the first to the tenth of the seventh aspect
  • the core network device adopts a possible implementation manner of any one of the first to the second aspects of the ninth aspect and the ninth aspect.
  • the core network selection method, device and system according to the embodiment of the present invention according to the UE according to its own service Select the DCN to be accessed to implement accurate selection of the core network device by the access network device, improve the accuracy of the DCN selected by the access network device, and avoid the increase of communication signaling and processing delay caused by the DCN reselection process. Communication efficiency.
  • FIG. 1 is a flow chart of an embodiment of a core network selection method of the present invention
  • FIG. 2 is a flow chart of another embodiment of a core network selection method of the present invention.
  • FIG. 3 is a flowchart of still another embodiment of a method for selecting a core network according to the present invention.
  • FIG. 4 is a flowchart of still another embodiment of a core network selection method according to the present invention.
  • FIG. 5 is a flowchart of a fifth embodiment of a method for selecting a core network according to the present invention.
  • FIG. 6 is a flowchart of a sixth embodiment of a method for selecting a core network according to the present invention.
  • FIG. 7 is a flowchart of a seventh embodiment of a method for selecting a core network according to the present invention.
  • FIG. 8 is a flowchart of an eighth embodiment of a method for selecting a core network according to the present invention.
  • FIG. 9 is a flowchart of a ninth embodiment of a method for selecting a core network according to the present invention.
  • FIG. 10 is a flowchart of a tenth embodiment of a method for selecting a core network according to the present invention.
  • FIG. 11 is a schematic structural diagram of an embodiment of a UE according to the present invention.
  • FIG. 12 is a schematic structural diagram of an embodiment of an access network device according to the present invention.
  • FIG. 13 is a schematic structural diagram of an embodiment of a core network device according to the present invention.
  • FIG. 14 is a schematic structural diagram of another embodiment of a UE according to the present invention.
  • FIG. 15 is a schematic structural diagram of another embodiment of an access network device according to the present invention.
  • FIG. 16 is a schematic structural diagram of another embodiment of a core network device according to the present invention.
  • Figure 17 is a block diagram showing the structure of an embodiment of a communication system of the present invention.
  • FIG. 1 is a flowchart of an embodiment of a method for selecting a core network according to the present invention. As shown in FIG. 1 , the method in this embodiment may include:
  • Step 101 Obtain first DCN information from an access network device, where the first DCN information includes information of at least one DCN accessible by the access network device.
  • the core network selection method is applicable to a network system in which a core network is network-sliced, and a DCN corresponding to a single network fragment can be defined as a set of functional entities that support communication service requirements of a specific scenario, for example, a mobile management entity of a 4G network ( Mobility Management Entity (MME), Serving GPRS Support Node (SGSN) of 3G network.
  • MME Mobility Management Entity
  • SGSN Serving GPRS Support Node
  • the executor of the present embodiment may be a user equipment (User Equipment, UE for short), and the UE obtains the first DCN information from the access network device, where the access network device may be an evolved Node B (abbreviated as eNB).
  • eNB evolved Node B
  • the access network device can access one or more DCNs, and the access network devices and these During the DCN pre-configuration process, the access network device can obtain the information of the DCNs, and the access network device sends the DCN information to the UE.
  • Radio Access Network Node Radio Access Network Node, RAN Node for short
  • Step 102 Select, according to the first DCN information, a DCN to be accessed from the at least one DCN.
  • the UE can learn, according to the first DCN information acquired from the access network device, which one of the candidate DCNs is selected, that is, one of the candidate DCNs can be selected as the DCN to be accessed, and the UE selects the DCN to be accessed.
  • the DCN to be accessed that matches the service type can be selected from the candidate DCN according to the service type, including the device type of the UE, the type of the UE, and the like.
  • the usage type of the UE is a common network service.
  • the DCN to be accessed by the UE needs to be mainly responsible for the related services of the mobile broadband network.
  • the UE may also select the DCN with the highest priority as the DCN to be accessed from the candidate DCN, or randomly select one as the DCN to be accessed.
  • Step 103 Send the information about the DCN to be accessed to the access network device, so that the access network device determines the core network device according to the information of the DCN to be accessed.
  • the UE After selecting the DCN to be accessed, the UE sends its information to the access network device, so that the access network
  • the device can determine the core network device according to the DCN functional entity group identifier to which the DCN to be accessed belongs.
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 2 is a flowchart of another embodiment of a method for selecting a core network according to the present invention. As shown in FIG. 2, the method in this embodiment may include:
  • Step 201 Send first DCN information to the UE, so that the UE selects a DCN to be accessed according to the first DCN information, where the first DCN information includes information about at least one DCN accessible by the access network device. ;
  • This embodiment corresponds to the method embodiment shown in FIG. 1, and the execution entity is the foregoing access network device.
  • the access network device sends the first DCN information including the information of the at least one DCN that the access network device can access to the UE, so that the UE performs the foregoing step 102 to select the DCN to be accessed.
  • Step 202 Receive information about the DCN to be accessed sent by the UE.
  • Step 203 Determine a core network device according to the information of the DCN to be accessed and the pre-configured second DCN information, and initiate a service request to the core network device.
  • the access network device selects the final core network device from the pre-configured second DCN information according to the information of the DCN to be accessed, where the second DCN information is the access network device and
  • the at least one DCN that is accessible to the access network device is pre-configured, and includes information about the at least one DCN, for example, a type, a DCN identifier (ID), a priority, a DCN functional entity group identifier, and the like.
  • the access network device finds, from the second DCN information, a core network device that matches the information of the DCN to be accessed, as the core network device. After that, the core network device can send the service request of the UE to the core network device for processing.
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 3 is a flowchart of still another embodiment of a method for selecting a core network according to the present invention. As shown in FIG. 3, the method in this embodiment may include:
  • Step 301 Send second DCN information to the access network device, so that the access network device determines the core network device according to the second DCN information.
  • This embodiment corresponds to the method embodiment shown in FIG. 2, and the execution entity is the core network device.
  • the core network device Before the access network device determines the core network device, the core network device performs interaction with the access network device to configure DCN information, and the access network device communicates with the core network device in the accessible DCN, and the core network device connects The DCN information is sent to the access network device, so that the access device can form a list of information of one or more DCNs.
  • Step 302 Process a service request initiated by the access network device.
  • the core network device After establishing a link with the access network device, the core network device can process the service request sent by the access network device.
  • the DCN information is pre-configured by the core network device and the access network device, so that the access network device can accurately select the core network device, improve the accuracy of the access network device to select the DCN, and avoid the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 4 is a flowchart of still another embodiment of a method for selecting a core network according to the present invention.
  • the method in this embodiment is applicable to a UE, a RAN Node, an MME/SGSN, and a Home Subscriber Server (Home Subscriber Server, Abbreviation: HSS) communication system, wherein the MME/SGSN is the core network device, and the HSS is a core network device that provides the core network user plane function.
  • HSS Home Subscriber Server
  • the method in this embodiment can be applied to any UE including
  • the communication system of the network access device and the core network device is described as an example for facilitating description of the method embodiments.
  • the method of this embodiment may include:
  • the MME/SGSN sends the second DCN information to the RAN Node, where the second DCN information includes a type of the at least one DCN that the RAN Node can access and a DCN functional entity group identifier.
  • the MME/SGSN configures the second DCN information to the RAN Node, where the second DCN information may include a list of information of one or more DCNs that the RAN Node can access, and each list item includes the following attribute information.
  • DCN Type DCN Type
  • DCN functional entity group identifier for example, MME Group ID (Group ID), SGSN Group ID or default NRI, etc.
  • the DCN Type indicates a specific communication service or communication scenario supported by the DCN.
  • the DCN Type is a cellular Internet of Things (CIoT), an Ultra-Reliable Communication (URC) network, and a mobile broadband network (MBB). Wait.
  • CCIoT Internet of Things
  • URC Ultra-Reliable Communication
  • MBB mobile broadband network
  • the UE sends a first message to the RAN Node, where the first message is used to indicate the UE. DCN selection ability;
  • the first message may be a Radio Resource Control (RRC) connection request message (RRC Connection Request), and the UE sends an RRC Connection Request to the RAN Node, where the indication information indicating the DCN selection capability of the UE may be carried therein. To indicate that the UE has DCN selection capability.
  • RRC Radio Resource Control
  • the RAN Node sends a second message to the UE, where the second message includes first DCN information, where the first DCN information includes a type of at least one DCN that the RAN Node can access.
  • the second message may be an RRC Connection Setup message, and the RAN Node carries the first DCN information in the RRC Connection Setup of the reply, including the type of the at least one DCN that the RAN Node can access.
  • the UE selects, from the at least one DCN that the RAN Node can access, a DCN whose type matches the service type, as the DCN to be accessed;
  • the UE selects the type of the DCN that matches the service type according to the service type, including the usage type of the UE and the device type of the UE. For example, if the UE is used as a common meter or a common sensor, the type of the DCN that matches the service type. For the CIoT; the UE is used as a vehicle or telemedicine, and the type of DCN matching the service type is URC; if the UE is used as a general network service for entertainment or monitoring, the type of DCN matching the service type is MBB. .
  • the UE may determine the DCN to be accessed according to the type of DCN that matches the type of service.
  • the preset default DCN may be selected as the DCN to be accessed.
  • the default DCN may be pre-configured by the MME/SGSN to the RAN Node, and then the RAN Node passes the RRC.
  • the connection setup is sent to the UE; or the UE may send a termination access request to the RAN Node to terminate the connection request procedure; or the UE may perform a process such as PLMN reselection and/or cell reselection to obtain the first from other RAN Nodes. DCN information.
  • the UE sends the type of the DCN to be accessed to the RAN Node.
  • the UE may encapsulate the type of the DCN to be accessed in an RRC Connection Setup Complete message (RRC Connection Setup Complete) and send it to the RAN Node.
  • RRC Connection Setup Complete may also carry a non-access stratum (Non-Access Stratum, NAS for short) message, for example, Attach, Tracking Area Update (referred to as: TAU) or Route Area Update (RAU) request message, Service Request message.
  • NAS non-access stratum
  • TAU Tracking Area Update
  • RAU Route Area Update
  • the RAN Node determines, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed.
  • the RAN Node may determine the DCN functional entity group identifier corresponding to the DCN Type according to the DCN Type and the second DCN information. If there is no DCN functional entity group identifier corresponding to the DCN Type in the second DCN information, the RAN Node may select a default DCN or send an RRC Connection Reject message to the UE, and carry the rejection reason in the RRC Connection Reject as " There is no DCN available (No DCN available) and no further steps are performed.
  • the RAN Node determines the MME/SGSN according to the DCN functional entity group identifier and the second preset rule
  • the RAN Node further selects one functional entity in the DCN corresponding to the DCN functional entity group identifier as a core network device, for example, an MME in 4G, or an SGSN in 3G.
  • the second preset rule may include: selecting a functional entity with a lower load according to a Load Balancing principle according to a load balancing principle according to a load condition of each functional entity in the DCN functional entity group corresponding to the DCN functional entity group identifier; The core network device for the service request.
  • the RAN Node initiates a service request to the MME/SGSN.
  • S409 Perform service processing by the UE, the RAN Node, the MME/SGSN, and the HSS.
  • the RAN Node forwards the NAS message in the RRC Connection Setup Complete message to the determined MME/SGSN, which processes the NAS message and sends a Create Session message to the HSS in the DCN to be accessed.
  • the MME/SGSN and the HSS, the RAN Node, and the UE jointly complete the NAS process corresponding to the NAS message.
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 5 is a flowchart of a fifth embodiment of a core network selection method according to the present invention.
  • the method in this embodiment is applicable to a communication system including a UE, a RAN Node, an MME/SGSN, and an HSS, where the MME The /SGSN is the core network device, and the HSS is the core network device that provides the user interface function of the core network.
  • the method in this embodiment can be applied to any The communication system of the UE, the access network device, and the core network device is described as an example for facilitating description of the method embodiments.
  • the method of this embodiment may include:
  • the MME/SGSN sends the second DCN information to the RAN Node, where the second DCN information includes a type, a DCN ID, a priority, and a DCN functional entity group identifier of the at least one DCN that the RAN Node can access.
  • the MME/SGSN configures the second DCN information to the RAN Node, where the second DCN information may include a list of information of one or more DCNs that the RAN Node can access, and each list item includes the following attribute information.
  • DCN Type DCN Type
  • DCN functional entity group identifier for example, MME Group ID (Group ID), SGSN Group ID or default NRI, etc.
  • the DCN Type indicates a specific communication service or communication scenario supported by the DCN.
  • the DCN Type is a cellular Internet of Things (CIoT), an Ultra-Reliable Communication (URC) network, and a mobile broadband network (MBB). Wait.
  • CCIoT Internet of Things
  • URC Ultra-Reliable Communication
  • MBB mobile broadband network
  • the DCN ID can be defined as a unique identifier of the DCN in a Public Land Mobile Network (PLMN), for example, 1, 2, ..., or the DCN ID can also be defined as a globally unique ID of the DCN.
  • PLMN Public Land Mobile Network
  • the mapping between the DCN Type and the DCN ID may be one-to-one or one-to-many. When one DCN Type corresponds to multiple DCN IDs, each DCN ID may further correspond to one priority level.
  • Table 1 is a schematic table of the second DCN information.
  • DCN ID DCN Type priority DCN functional entity group identifier 1 CIoT 1 MMEGI: 1100..00 2 CIoT 2 MMEGI: 1100..01 3 MBB 1 MMEGI: 1011..01
  • the UE sends a first message to the RAN Node, where the first message is used to indicate a DCN selection capability of the UE.
  • S502 is similar to the above s402 principle, and is not described here.
  • the RAN Node sends a second message to the UE, where the second message includes first DCN information, where the first DCN information includes a class of at least one DCN that the RAN Node can access. Type, DCN ID, and priority;
  • the first DCN information in the embodiment further includes the DCN ID and the priority of the at least one DCN that the RAN Node can access, and details are not described herein.
  • the UE selects, from the at least one DCN, one or more DCNs whose type matches the service type.
  • the UE selects the type of the DCN that matches the service type according to the service type, including the usage type of the UE and the device type of the UE. For example, if the UE is used as a common meter or a common sensor, the type of the DCN that matches the service type. For the CIoT; the UE is used as a vehicle or telemedicine, and the type of DCN matching the service type is URC; if the UE is used as a general network service for entertainment or monitoring, the type of DCN matching the service type is MBB. .
  • the UE may determine one or more DCNs according to the type of DCN that matches the service type. When one DCN, the mapping between the DCN Type and the DCN ID is one-to-one. When multiple DCNs are used, the mapping between the DCN Type and the DCN ID is one. Too many.
  • the UE determines the DCN as a DCN to be accessed;
  • the UE directly obtains the DCN ID of the DCN.
  • the UE selects a DCN to be accessed from the multiple DCNs according to the priority;
  • the DCN ID of each DCN can be set with priority, and the UE can further select the DCN ID according to the priority after determining the DCN Type.
  • DCN Type CIoT
  • the UE can continue to select the DCN with the matching priority level as the DCN to be accessed according to the service type.
  • the priority of the DCN can be changed.
  • S505a and s505b are the steps of the alternative, the number of DCNs matching the type and the service type. Determine which step to perform.
  • the preset default DCN may be selected as the DCN to be accessed.
  • the default DCN may be pre-configured by the MME/SGSN to the RAN Node, and then the RAN Node passes the RRC.
  • the connection setup is sent to the UE; or the UE may send a termination access request to the RAN Node to terminate the connection request procedure; or the UE may perform a process such as PLMN reselection and/or cell reselection to obtain the first from other RAN Nodes. DCN information.
  • the UE sends the DCN ID of the DCN to be accessed to the RAN Node;
  • S506 is similar to the s405 principle. The difference is that the UE is configured to encapsulate the DCN ID of the DCN to be accessed in the RRC Connection Setup Complete and send it to the RAN Node.
  • the RAN Node determines, according to the DCN ID of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the DCN ID of the DCN to be accessed.
  • S507 is similar to the foregoing s406. The difference is that the RAN Node determines the DCN functional entity group identifier according to the DCN ID of the DCN to be accessed in this embodiment, and details are not described herein again.
  • the RAN Node determines the MME/SGSN according to the DCN functional entity group identifier and the second preset rule
  • S508 is similar to the above s407 principle and will not be described here.
  • the RAN Node initiates a service request to the MME/SGSN;
  • S510 Perform service processing by the UE, the RAN Node, the MME/SGSN, and the HSS.
  • S509 to s510 are similar to the above s408 to s409, and are not described here.
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 6 is a flowchart of a sixth embodiment of a core network selection method according to the present invention.
  • the method in this embodiment is applicable to a communication system including a UE, a RAN Node, an MME/SGSN, and an HSS, where the MME The SGSN is the core network device, and the HSS is the core network device that provides the core network user plane function.
  • the method in this embodiment can be applied to any communication system including the UE, the access network device, and the core network device.
  • the above communication system is only an example.
  • the method of this embodiment may include:
  • the MME/SGSN sends the second DCN information to the RAN Node, where the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier that the RAN Node can access;
  • S601 is similar to the above s401 principle, and is not described here.
  • the RAN Node sends a third message to the UE, where the third message includes first DCN information, where the first DCN information includes a type of at least one DCN that the RAN Node can access.
  • the third message may be a broadcast message sent by the RAN Node, including the type of at least one DCN accessible by the RAN Node.
  • the UE may perform the PLMN selection according to the broadcast message and the selection of the DCN to be accessed in the following two ways:
  • the UE determines, according to the first preset rule, the PLMN to be accessed;
  • the first preset rule may include: the UE preferentially selects the PLMN (Registered PLMN) that was successfully registered the previous time or the PLMN that is equivalent to the Registered PLMN, and secondly selects the PLMN of the UE's home location or the PLMN equivalent to the PLMN of the home location. It is the preferred PLMN configured by the user or operator.
  • PLMN Registered PLMN
  • the UE selects a DCN whose type matches the service type from the at least one DCN supported by the PLMN to be accessed as the DCN to be accessed;
  • the UE first performs a PLMN selection process, selects one PLMN ID from multiple PLMN IDs, and then selects a DCN whose DCN Type matches the service type from the at least one DCN supported by the PLMN as the DCN to be accessed, and the UE selects the to-be-accessed.
  • the DCN process is similar to the above s404 principle and will not be described here.
  • the DCN Type may be used as a parameter included in the information of each PLMN in the broadcast message, that is, the information of each PLMN may include ⁇ PLMN ID, ⁇ DCN Type 1, DCN Type 2 ⁇ , .
  • the UE selects, from the at least one DCN that the RAN Node can access, a DCN whose type matches the service type, as the DCN to be accessed;
  • the UE determines, according to the type of the DCN to be accessed, the PLMN to be accessed;
  • the UE first selects a DCN whose type matches the service type from the DCN Type of the at least one DCN that the RAN Node can access.
  • the process of selecting the DCN whose type matches the service type is similar to the foregoing s404 principle, and details are not described herein again.
  • the UE selects one of the PLCNs of the DCN Type supporting the selected DCN as the PLMN to be accessed.
  • the information may include ⁇ DCN Type, ⁇ PLMN ID1, PLMN ID2 ⁇ , ... ⁇ .
  • S603a ⁇ s604a and s603b ⁇ s604b are two-step selection steps. Through these two methods, the UE can implement the PLMN selection and the selection of the DCN to be accessed.
  • the preset default DCN may be selected as the DCN to be accessed.
  • the default DCN may be pre-configured by the MME/SGSN to the RAN Node, and then the RAN Node passes the RRC.
  • the connection setup is sent to the UE; or the UE may send a termination access request to the RAN Node to terminate the connection request procedure; or the UE may perform a process such as PLMN reselection and/or cell reselection to obtain the first from other RAN Nodes. DCN information.
  • the UE requests the RAN Node to establish a wireless connection.
  • the UE requests the RAN Node to establish a radio connection, that is, performs a cell selection process, selects a cell under the PLMN selected in the foregoing step, and performs a random access procedure to establish a connection with the RAN Node, and the UE may send an RRC Connection Request to the RAN Node.
  • the RAN Node replies to the RRC Connection Setup.
  • the UE sends the type of the DCN to be accessed to the RAN Node;
  • S606 is similar to the above s405 principle, and is not described here.
  • the RAN Node determines, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed;
  • S607 is similar to the above s406 principle and will not be described here.
  • the RAN Node determines the MME/SGSN according to the DCN functional entity group identifier and the second preset rule
  • S608 is similar to the above s407 principle and will not be described here.
  • the RAN Node initiates a service request to the MME/SGSN.
  • S610 Perform service processing by the UE, the RAN Node, the MME/SGSN, and the HSS.
  • S609 to s610 are similar to the above s408 to s409, and are not described here.
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 7 is a flowchart of a seventh embodiment of a method for selecting a core network according to the present invention.
  • the method in this embodiment is applicable to a communication system including a UE, a RAN Node, an MME/SGSN, and an HSS, where MME The SGSN is the core network device, and the HSS is the core network device that provides the core network user plane function.
  • MME The SGSN is the core network device
  • the HSS is the core network device that provides the core network user plane function.
  • the method in this embodiment can be applied to any communication system including the UE, the access network device, and the core network device.
  • the above communication system is only an example.
  • the method of this embodiment may include:
  • the MME/SGSN sends the second DCN information to the RAN Node, where the second DCN information includes a type, a DCN ID, a priority, and a DCN functional entity group identifier of the at least one DCN that the RAN Node can access.
  • S701 is similar to the above s501 principle and will not be described here.
  • the RAN Node sends a third message to the UE, where the third message includes first DCN information, where the first DCN information includes a type, a DCN ID, and a priority of at least one DCN accessible by the RAN Node.
  • the s702 is similar to the foregoing s602. The difference is that the first DCN information in the embodiment further includes the DCN ID and the priority of the at least one DCN that the RAN Node can access, and details are not described herein again.
  • the UE may perform the PLMN selection according to the broadcast message and the selection of the DCN to be accessed in the following two ways:
  • the UE determines, according to the first preset rule, the PLMN to be accessed;
  • the UE selects one or more DCNs of a type matching the service type from the at least one DCN supported by the PLMN to be accessed;
  • S704a is similar to the above s604a and will not be described here.
  • the UE determines the DCN as a DCN to be accessed;
  • the UE selects a DCN to be accessed from the multiple DCNs according to the priority;
  • the UE first performs a PLMN selection process, selects one PLMN ID from a plurality of PLMN IDs, and then selects a DCN Type and a DCN ID from at least one DCN supported by the PLMN, and the process of selecting the DCN Type and the DCN ID by the UE and the foregoing s504 to s505b principles Similar, it will not be repeated here.
  • the DCN ID may be used as a parameter included in the information of each PLMN in the broadcast message, that is, the information of each PLMN may include ⁇ PLMN ID, ⁇ DCN Type 1, DCN ID1, DCN ID2 ⁇ , ⁇ DCN Type2, DCN ID3, DCN ID4 ⁇ ,... ⁇ .
  • the UE selects, from the at least one DCN that the RAN Node can access, a DCN whose type matches the service type;
  • the UE determines, according to the type of the DCN that the type matches the service type, the PLMN to be accessed;
  • the UE selects the DCN with the highest priority from the at least one DCN supported by the PLMN to be accessed as the DCN to be accessed according to the priority;
  • the UE first selects a DCN whose type matches the service type from the DCN Type of the at least one DCN that the RAN Node can access.
  • the process of selecting the DCN whose type matches the service type is similar to the foregoing s404 principle, and details are not described herein again.
  • the UE selects one of the PLCNs of the DCN Type supporting the selected DCN as the PLMN to be accessed.
  • the UE selects the DCN with the highest priority from the at least one DCN supported by the PLMN to be accessed according to the priority as the DCN to be accessed.
  • the DCN IDs corresponding to the same PLMN ID may be arranged in order of priority, and the UE preferentially selects the DCN ID with a high priority.
  • each DCN information in the broadcast message may include ⁇ DCN Type, ⁇ PLMN ID1, DCN ID1, DCN ID2 ⁇ , ⁇ PLMN ID2, DCN ID3, DCN ID4 ⁇ , ... ⁇ .
  • the information of each DCN in the broadcast message at this time may include ⁇ DCN Type, ⁇ PLMN ID1, PLMN ID2 ⁇ , ... ⁇ .
  • S703a to s705b and s703c to s705c are two alternative steps. Through these two methods, the UE can implement the PLMN selection and the selection of the DCN to be accessed.
  • the preset default DCN may be selected as the DCN to be accessed.
  • the default DCN may be pre-configured by the MME/SGSN to the RAN Node, and then the RAN Node passes the RRC.
  • the connection setup is sent to the UE; or the UE may send a termination access request to the RAN Node to terminate the connection request procedure; or the UE may perform a process such as PLMN reselection and/or cell reselection to obtain the first from other RAN Nodes. DCN information.
  • the UE requests the RAN Node to establish a wireless connection.
  • S706 is similar to the above s605 principle and will not be described here.
  • the UE sends the DCN ID of the DCN to be accessed to the RAN Node;
  • S707 is similar to the above s506 principle and will not be described here.
  • the RAN Node determines, according to the DCN ID of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the DCN ID of the DCN to be accessed.
  • S708 is similar to the above s507 principle and will not be described here.
  • the RAN Node determines the MME/SGSN according to the DCN functional entity group identifier and the second preset rule
  • S709 is similar to the above s407 principle and will not be described here.
  • the RAN Node initiates a service request to the MME/SGSN.
  • S711 Perform service processing by the UE, the RAN Node, the MME/SGSN, and the HSS.
  • S710 to s711 are similar to the above s408 to s409, and are not described here.
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 8 is a flowchart of an eighth embodiment of a core network selection method according to the present invention.
  • the method in this embodiment is applicable to a communication system including a UE, a RAN Node, a C-SGN, and a P-GW/AS.
  • the C-SGN is the core network device
  • the P-GW/AS is the core network device that provides the core network user plane function. It should be noted that the method in this embodiment can be applied to any UE and access network device.
  • the communication system of the core network device in order to facilitate the description of the method embodiment, the above communication system is only an example.
  • the method of this embodiment may include:
  • the UE sends a first message to the RAN Node, where the first message includes a type of the DCN to be accessed selected by the UE.
  • the RRC Connection Request also carries application layer small data, and the application layer small data can be encapsulated in the NAS message.
  • the RAN Node determines, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed.
  • the RAN Node determines the C-SGN according to the DCN functional entity group identifier and the second preset rule
  • the RAN Node further selects one functional entity in the DCN corresponding to the DCN functional entity group identifier as a core network device, for example, an MME in 4G, or an SGSN in 3G.
  • the RAN Node initiates a service request to the C-SGN.
  • S805 Perform service processing by the UE, the RAN Node, the C-SGN, and the P-GW/AS.
  • the RAN Node extracts the NAS message encapsulating the application layer small data in the RRC Connection Request message, and sends the NAS message to the C-SGN.
  • the C-SGN sends the application layer small data to a Packet Data Network Gateway (P-GW) or an Application Server (AS).
  • P-GW Packet Data Network Gateway
  • AS Application Server
  • the UE selects the DCN to be accessed according to the service type of the UE, implements accurate selection of the core network device by the access network device, improves the accuracy of selecting the DCN of the access network device, and avoids the DCN reselection process.
  • Communication signaling increases and processing delays, improving communication efficiency.
  • FIG. 9 is a flowchart of a ninth embodiment of a core network selection method according to the present invention. As shown in FIG. 9, the method in this embodiment is applicable to a communication system including an access network device and a core network device.
  • the method of this embodiment may include:
  • the core network device receives a fifth message sent by the access network device, where the fifth message is used to indicate the DCN selection capability of the access network device or is used to request the second DCN information.
  • the fifth message is an S1 Setup Request message (S1Setup Request) or an Uplink Information Exchange Request message.
  • the core network device sends a sixth message to the access network device, where the sixth message includes the second DCN information.
  • the sixth message is an S1 Setup Response message (S1Setup Response), which is an Uplink Information Exchange Response message.
  • S1Setup Response S1Setup Response
  • FIG. 10 is a flowchart of a tenth embodiment of a core network selection method according to the present invention. As shown in FIG. 10, the method in this embodiment is applicable to a communication system including an access network device and a core network device.
  • the method of this embodiment may include:
  • the core network device sends a seventh message to the access network device, where the seventh message includes Describe the second DCN information;
  • the seventh message is that the mobility management entity MME configuration update message (MME Configuration Update) is an information transfer indication message (Information Transfer Indication).
  • MME Configuration Update is an information transfer indication message (Information Transfer Indication).
  • the core network device receives the message acknowledgement response message sent by the access network device according to the seventh message.
  • the message acknowledgement response message may be configured for the MME to configure an MME Configuration Update Acknowledge or an Information Transfer Confirmation.
  • FIG. 11 is a schematic structural diagram of an embodiment of a UE according to the present invention.
  • the apparatus in this embodiment may include: a receiving module 11, a selecting module 12, and a sending module 13, wherein the receiving module 11 is configured to be connected.
  • the network access device obtains the DCN information of the first dedicated core network, where the first DCN information includes information of at least one DCN that the access network device can access; and the selecting module 12 is configured to use the first DCN information according to the Determining, in the at least one DCN, the DCN to be accessed; the sending module 13 is configured to send the information about the DCN to be accessed to the access network device, so that the access network device is connected according to the The information of the incoming DCN determines the core network device.
  • the device of this embodiment may be used to implement the technical solution of the method embodiment of any one of FIG. 1 and FIG. 4, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the first DCN information includes a type of the at least one DCN
  • the selecting module 12 is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the user equipment UE as the to-be-served
  • the DCN that is accessed the sending module 13 is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device is configured according to the DCN to be accessed.
  • the type determines the core network device.
  • the first DCN information includes a type of the at least one DCN, a DCN identification ID, and a priority.
  • the selecting module 12 is specifically configured to select a type from the at least one DCN to match a service type of the UE. One or more DCNs; when there is a DCN type matching the service type, determining the DCN as the DCN to be accessed; or when there are multiple DCN types and the service type When the matching is performed, the DCN to be accessed is selected from the multiple DCNs according to the priority; the sending module 13 is specifically configured to send the DCN ID of the DCN to be accessed to the access And the network device, so that the access network device determines the core network device according to the DCN ID of the DCN to be accessed.
  • the sending module 13 is further configured to send a first message to the access network device, where the first message is used to indicate a DCN selection capability of the UE, and the receiving module 11 is specifically configured to receive the And the second message sent by the access network device according to the first message, where the second message includes the first DCN information.
  • the first DCN information includes a type of the at least one DCN;
  • the selecting module 12 is specifically configured to determine, according to a first preset rule, a public land mobile network PLMN to be accessed;
  • the DCN of the at least one DCN supported by the PLMN is selected as the DCN that matches the service type of the UE, and
  • the sending module 13 is configured to send the type of the DCN to be accessed to the Accessing the network device, so that the access network device determines the core network device according to the type of the DCN to be accessed.
  • the first DCN information includes a type of the at least one DCN
  • the selecting module 12 is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the UE as the to-be-connected
  • the incoming DCN is determined according to the type of the DCN to be accessed
  • the sending module 13 is configured to send the type of the DCN to be accessed to the access network device, And causing the access network device to determine the core network device according to the type of the DCN to be accessed.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN;
  • the selecting module 12 is specifically configured to determine, according to the first preset rule, a PLMN to be accessed; And selecting one or more DCNs of the at least one DCN supported by the accessed PLMN to match the service type of the UE; when there is a DCN type matching the service type, determining the DCN as the pending The incoming DCN; or, when the type of the plurality of DCNs matches the service type, select the DCN to be accessed from the plurality of DCNs according to the priority; the sending module 13 is specifically used And sending the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the core network device according to the DCN ID of the DCN to be accessed.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN
  • the selecting module 12 is specifically configured to select, according to a service type of the UE, a type selected from the at least one DCN. Determining a PLMN to be accessed according to the type of the DCN that matches the type of the service of the UE; selecting the DCN with the highest priority from the at least one DCN supported by the PLMN to be accessed as the priority Describe the DCN to be accessed; the sending The module 13 is specifically configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the core network according to the DCN ID of the DCN to be accessed. device.
  • the receiving module 11 is specifically configured to receive a third message sent by the access network device, where the third message includes the first DCN information.
  • the sending module 13 is further configured to request the access network device to establish a wireless connection.
  • the selecting module 12 is further configured to: when there is no DCN of the type matching the service type in the at least one DCN, select a preset default DCN as the DCN to be accessed; or When there is no DCN of the type that matches the service type in the at least one DCN, sending a termination access request to the access network device; or, when there is no DCN of the type matching the service type in the at least one DCN And acquiring the first DCN information from other access network devices.
  • FIG. 12 is a schematic structural diagram of an embodiment of an access network device according to the present invention.
  • the apparatus in this embodiment may include: a sending module 21, a receiving module 22, and a determining module 23, where the sending module 21 uses Transmitting the first dedicated core network DCN information to the user equipment UE, so that the UE selects the DCN to be accessed according to the first DCN information, where the first DCN information includes at least one accessable by the access network device.
  • the device of this embodiment may be used to implement the technical solution of the method embodiment of any of the embodiments of FIG. 2, and the implementation of the method is not described herein.
  • the information about the DCN to be accessed includes the type of the DCN to be accessed, and the determining module 23 is specifically configured to determine, according to the type of the DCN to be accessed and the second DCN information.
  • a DCN functional entity group identifier corresponding to the type of the DCN to be accessed; determining the core network device according to the DCN functional entity group identifier and a second preset rule.
  • the determining module 23 is further configured to: when determining, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed. Determining a default default core network device as the core network device; or When the DCN functional entity group identifier corresponding to the type of the DCN to be accessed is not determined according to the type of the DCN to be accessed and the second DCN information, the fourth message is sent to the UE. The fourth message is used to terminate the access request.
  • the information about the DCN to be accessed includes the DCN ID of the DCN to be accessed, and the determining module 23 is specifically configured to: according to the DCN ID of the DCN to be accessed and the second DCN Determining, by the DCN functional entity group identifier corresponding to the DCN to be accessed, determining the core network device according to the DCN functional entity group identifier and a second preset rule.
  • the determining module 23 is further configured to: when determining, according to the DCN ID of the DCN to be accessed and the second DCN information, a DCN functional entity corresponding to the DCN ID of the DCN to be accessed When the group is identified, the preset default core network device is determined as the core network device; or when the DCN ID and the second DCN information of the DCN to be accessed are not determined to be related to the to-be-accessed When the DCN function entity group corresponding to the DCN ID of the DCN is identified, the fourth message is sent to the UE, and the fourth message is used to terminate the access request.
  • the receiving module 22 is further configured to acquire the second DCN information from a core network device, where the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the receiving module 22 is further configured to receive a first message sent by the UE, where the first message is used to indicate a DCN selection capability of the UE, and the sending module 21 is specifically configured to use the The first message sends a second message to the UE, the second message including the first DCN information.
  • the sending module 21 is specifically configured to send a third message to the UE, where the third message includes the first DCN information.
  • FIG. 13 is a schematic structural diagram of an embodiment of a core network device according to the present invention.
  • the apparatus in this embodiment may include: a sending module 31 and a processing module 32, where the sending module 31 is configured to access the network.
  • the device sends the second dedicated core network DCN information, so that the access network device determines the core network device according to the second DCN information, and the processing module 32 is configured to process the service request initiated by the access network device.
  • the device of this embodiment may be used to execute the technical method of the method embodiments of any of FIG. 3, 4-10.
  • the implementation principle and technical effect are similar, and will not be described here.
  • the second DCN information includes a type of at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • FIG. 14 is a schematic structural diagram of another embodiment of a UE according to the present invention.
  • the apparatus of this embodiment may include: a receiver 41, a processor 42, and a transmitter 43, wherein the receiver 41 is configured to The access network device obtains the first dedicated core network DCN information, where the first DCN information includes information of at least one DCN accessible by the access network device, and the processor 42 is configured to: according to the first DCN information
  • the DCN to be accessed is selected by the at least one DCN, and the transmitter 43 is configured to send the information about the DCN to be accessed to the access network device, so that the access network device is configured according to the The information of the accessed DCN determines the core network device.
  • the device of this embodiment may be used to implement the technical solution of the method embodiment of any one of FIG. 1 and FIG. 4, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the first DCN information includes a type of the at least one DCN
  • the processor 42 is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the user equipment UE as the to-be-served
  • the DCN that is accessed the transmitter 43 is specifically configured to send the type of the DCN to be accessed to the access network device, so that the access network device is configured according to the DCN to be accessed.
  • the type determines the core network device.
  • the first DCN information includes a type of the at least one DCN, a DCN identification ID, and a priority.
  • the processor 42 is specifically configured to select a type from the at least one DCN to match a service type of the UE. One or more DCNs; when there is a DCN type matching the service type, determining the DCN as the DCN to be accessed; or when there are multiple DCN types and the service type When the matching is performed, the DCN to be accessed is selected from the multiple DCNs according to the priority; the transmitter 43 is specifically configured to send the DCN ID of the DCN to be accessed to the access And the network device, so that the access network device determines the core network device according to the DCN ID of the DCN to be accessed.
  • the transmitter 43 is further configured to send, to the access network device, a first message, where the first message is used to indicate a DCN selection capability of the UE, and the receiver 41 is specifically configured to receive the The second message sent by the access network device according to the first message, where the second message includes the A DCN message.
  • the first DCN information includes a type of the at least one DCN; the processor 42 is specifically configured to determine, according to a first preset rule, a public land mobile network PLMN to be accessed; The DCN of the at least one DCN supported by the PLMN is selected as the DCN that matches the service type of the UE, and the transmitter 43 is configured to send the type of the DCN to be accessed to the Accessing the network device, so that the access network device determines the core network device according to the type of the DCN to be accessed.
  • the first DCN information includes a type of the at least one DCN
  • the processor 42 is specifically configured to select, from the at least one DCN, a DCN whose type matches the service type of the UE, as the to-be-connected The incoming DCN; determining the PLMN to be accessed according to the type of the DCN to be accessed; the transmitter 43 is specifically configured to send the type of the DCN to be accessed to the access network device, And causing the access network device to determine the core network device according to the type of the DCN to be accessed.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN
  • the processor 42 is specifically configured to determine, according to the first preset rule, a PLMN to be accessed; And selecting one or more DCNs of the at least one DCN supported by the accessed PLMN to match the service type of the UE; when there is a DCN type matching the service type, determining the DCN as the pending The incoming DCN; or, when the type of the plurality of DCNs matches the service type, select the DCN to be accessed from the plurality of DCNs according to the priority; the transmitter 43 is specifically used And sending the DCN ID of the DCN to be accessed to the access network device, so that the access network device determines the core network device according to the DCN ID of the DCN to be accessed.
  • the first DCN information includes a type, a DCN ID, and a priority of the at least one DCN
  • the processor 42 is configured to select, according to a service type of the UE, a type selected from the at least one DCN. Determining a PLMN to be accessed according to the type of the DCN that matches the type of the service of the UE; selecting the DCN with the highest priority from the at least one DCN supported by the PLMN to be accessed as the priority Determining the DCN to be accessed; the transmitter 43 is configured to send the DCN ID of the DCN to be accessed to the access network device, so that the access network device is to be accessed according to the The DCN ID of the DCN determines the core network device.
  • the receiver 41 is specifically configured to receive a third cancellation sent by the access network device.
  • the third message includes the first DCN information.
  • the transmitter 43 is further configured to request the access network device to establish a wireless connection.
  • the processor 42 is further configured to: when there is no DCN of the type matching the service type, the preset default DCN is selected as the DCN to be accessed; or When there is no DCN of the type that matches the service type in the at least one DCN, sending a termination access request to the access network device; or, when there is no DCN of the type matching the service type in the at least one DCN And acquiring the first DCN information from other access network devices.
  • FIG. 15 is a schematic structural diagram of another embodiment of an access network device according to the present invention.
  • the apparatus in this embodiment may include: a transmitter 51, a receiver 52, and a processor 53, wherein the transmitter 51, And sending, by the user equipment UE, the first dedicated core network DCN information, so that the UE selects a DCN to be accessed according to the first DCN information, where the first DCN information includes at least accessable by the access network device.
  • a DCN information a receiver 52, configured to receive information about the DCN to be accessed sent by the UE, and a processor 53, configured to use, according to the information about the DCN to be accessed, and a pre-configured second DCN The information determines the core network device and initiates a service request to the core network device.
  • the device of this embodiment may be used to implement the technical solution of the method embodiment of any of the embodiments of FIG. 2, and the implementation of the method is not described herein.
  • the information about the DCN to be accessed includes the type of the DCN to be accessed, and the processor 53 is specifically configured to determine, according to the type of the DCN to be accessed and the second DCN information.
  • a DCN functional entity group identifier corresponding to the type of the DCN to be accessed; determining the core network device according to the DCN functional entity group identifier and a second preset rule.
  • the processor 53 is further configured to: when determining, according to the type of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the type of the DCN to be accessed Determining a default default core network device as the core network device; or determining a type of the DCN to be accessed according to the type of the DCN to be accessed and the second DCN information When the corresponding DCN functional entity group identifies, the fourth message is sent to the UE, and the fourth message is used to terminate the access request.
  • the information about the DCN to be accessed includes the DCN of the DCN to be accessed.
  • the processor 53 is configured to determine, according to the DCN ID of the DCN to be accessed and the second DCN information, a DCN functional entity group identifier corresponding to the DCN to be accessed; according to the DCN The functional entity group identifier and the second preset rule determine the core network device.
  • the processor 53 is further configured to: when determining, according to the DCN ID of the DCN to be accessed and the second DCN information, a DCN functional entity corresponding to the DCN ID of the DCN to be accessed When the group is identified, the preset default core network device is determined as the core network device; or when the DCN ID and the second DCN information of the DCN to be accessed are not determined to be related to the to-be-accessed When the DCN function entity group corresponding to the DCN ID of the DCN is identified, the fourth message is sent to the UE, and the fourth message is used to terminate the access request.
  • the receiver 52 is further configured to acquire the second DCN information from a core network device, where the second DCN information includes a type of the at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID and a priority of the at least one DCN.
  • the receiver 52 is further configured to receive a first message sent by the UE, where the first message is used to indicate a DCN selection capability of the UE, and the transmitter 51 is specifically configured to be used according to the The first message sends a second message to the UE, the second message including the first DCN information.
  • the sender 51 is specifically configured to send a third message to the UE, where the third message includes the first DCN information.
  • FIG. 16 is a schematic structural diagram of another embodiment of a core network device according to the present invention.
  • the apparatus in this embodiment may include: a transmitter 61 and a processor 62, wherein the transmitter 61 is configured to access The network device sends the second dedicated core network DCN information, so that the access network device determines the core network device according to the second DCN information, and the processor 62 is configured to process the service request initiated by the access network device.
  • the device of this embodiment may be used to perform the technical solution of the method embodiment of any one of FIG. 3 and FIG. 4, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the second DCN information includes a type of at least one DCN and a DCN functional entity group identifier.
  • the second DCN information further includes a DCN ID of the at least one DCN and priority.
  • FIG. 17 is a schematic structural diagram of an embodiment of a communication system according to the present invention.
  • the system in this embodiment includes: a UE 71, an access network device 72, and a core network device 73.
  • the structure of the device embodiment shown in FIG. 11 is correspondingly configured to perform the technical solution of the method embodiment of FIG. 1 and FIG. 4 to FIG. 8 , and the implementation principle and technical effects thereof are similar, and details are not described herein again.
  • the access network device 72 can adopt the structure of the device embodiment shown in FIG. 12, and correspondingly, the technical solution of the method embodiment of any one of FIG. 2 and FIG. 4 to FIG. 10 can be executed, and the implementation principle and technical effect are similar. , will not repeat them here.
  • the core network device 73 can adopt the structure of the device embodiment shown in FIG. 13 , and correspondingly, the technical solution of the method embodiment of any one of FIG. 3 and FIG. 4 to FIG. 10 can be executed, and the implementation principle and the technical effect are similar. I will not repeat them here.
  • the UE 71 in the system structure shown in FIG. 17 may adopt the structure of the device embodiment shown in FIG. 14 , and correspondingly, the technical solution of any one of the method embodiments of FIG. 1 , FIG. 4 to FIG. 8 may be performed.
  • the implementation principle and technical effect are similar, and will not be described here.
  • the access network device 72 can adopt the structure of the device embodiment shown in FIG. 15 , and correspondingly, the technical solution of the method embodiment of any one of FIG. 2 and FIG. 4 to FIG. 10 can be executed, and the implementation principle and technical effect are similar. , will not repeat them here.
  • the core network device 73 can adopt the structure of the device embodiment shown in FIG. 16 , and correspondingly, the technical solution of the method embodiment of any one of FIG. 3 and FIG. 4 to FIG. 10 can be performed, and the implementation principle and the technical effect are similar. I will not repeat them here.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in various embodiments of the present invention may be integrated in one processing unit
  • each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

本发明提供一种核心网选择方法、装置及系统。该方法包括如下步骤：从接入网设备获取第一专用核心网（DCN）信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息（101）；根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN（102）；将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备（103）。采用本发明，可以提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。

Description

核心网选择方法、装置及系统 技术领域
本发明实施例涉及通信技术，尤其涉及一种核心网选择方法、装置及系统。
背景技术
为了满足不同场景的业务需求，可以采用网络分片(Network Slicing)的方法，由多个网络分片组成网络，其中单个网络分片可以定义为支持特定场景的通信业务需求的逻辑网络功能实体的集合，例如：支持大量机器设备通信的网络分片、支持移动宽带业务的网络分片等。网络分片可以有多种分片方式，例如：可以对核心网进行分片，也可以对接入网进行分片，还可以对核心网与接入网一起进行分片。第三代合作伙伴计划(3rd Generation Partnership Project，简称：3GPP)定义的专用核心网(Dedicated Core Network，简称：DCN)是对核心网进行分片的方案。
现有3GPP标准方案中，由核心网设备触发接入网设备的重新路由过程，当核心网控制功能实体接收到接入网设备发送的终端请求消息时，例如，注册、位置更新请求等，会判断自身是否属于服务于该接入网设备的特定DCN，若否，则携带接入网设备的特定DCN的信息请求接入网设备将终端请求消息重新路由到接入网设备的特定DCN中的核心网控制功能实体。
但是，上述方案中接入网设备的重新路由过程需要进行大量的通信信令的交互，导致处理时延的增加，降低通信效率。
发明内容
本发明实施例提供一种核心网选择方法、装置及系统，以提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
第一方面，本发明实施例提供一种核心网选择方法，包括：
从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括 所述接入网设备可接入的至少一个DCN的信息；
根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
结合第一方面，在第一方面的第一种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
从所述至少一个DCN中选择类型与用户设备UE的业务类型匹配的DCN作为所述待接入的DCN；
所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第一方面，在第一方面的第二种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；
所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；
当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第一方面、第一方面的第一种至第二种中任一项可能的实现方式，在第一方面的第三种可能的实现方式中，所述从接入网设备获取第一DCN信息之前，还包括：
向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；
所述从接入网设备获取第一DCN信息，包括：
接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
结合第一方面，在第一方面的第四种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
根据第一预设规则确定待接入的公共陆地移动网络PLMN；
从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第一方面，在第一方面的第五种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
根据所述待接入的DCN的类型确定待接入的PLMN；
所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第一方面，在第一方面的第六种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的 DCN，包括：
根据第一预设规则确定待接入的PLMN；
从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；
当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第一方面，在第一方面的第七种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；
根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；
根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；
所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第一方面、第一方面的第四种至第七种中任一项可能的实现方式，在第一方面的第八种可能的实现方式中，所述从接入网设备获取第一DCN信息，包括：
接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
结合第一方面的第四种至第八种中任一项可能的实现方式，在第一方面 的第九种可能的实现方式中，所述将所述待接入的DCN的信息发送给所述接入网设备之前，还包括：
向所述接入网设备请求建立无线连接。
结合第一方面、第一方面的第二种至第九种中任一项可能的实现方式，在第一方面的第十种可能的实现方式中，所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，还包括：
当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，
当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，
当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
第二方面，本发明实施例提供一种核心网选择方法，包括：
向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
接收所述UE发送的所述待接入的DCN的信息；
根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
结合第二方面，在第二方面的第一种可能的实现方式中，所述待接入的DCN的信息包括所述待接入的DCN的类型；
所述根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，包括：
根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；
根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
结合第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，所述根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，还包括：
当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所 述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，
当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
结合第二方面，在第二方面的第三种可能的实现方式中，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；
所述根据所述待接入的DCN的信息和预先配置的DCN信息确定核心网设备，包括：
根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；
根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
结合第二方面的第三种可能的实现方式，在第二方面的第四种可能的实现方式中，所述根据所述待接入的DCN的信息和预先配置的DCN信息确定核心网设备，还包括：
当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，
当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
结合第二方面、第二方面的第一种至第四种中任一种可能的实现方式，在第二方面的第五种可能的实现方式中，所述向UE发送第一DCN信息之前，还包括：
从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
结合第二方面的第五种可能的实现方式，在第二方面的第六种可能的实现方式中，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
结合第二方面、第二方面的第一种至第二种、第五种至第六种中任一种 可能的实现方式，在第二方面的第七种可能的实现方式中，所述向UE发送第一DCN信息之前，还包括：
接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；
所述向UE发送第一DCN信息，包括：
根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
结合第二方面、第二方面的第三种至第六种中任一种可能的实现方式，在第二方面的第八种可能的实现方式中，所述向UE发送第一DCN信息，包括：
向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
第三方面，本发明实施例提供一种核心网选择方法，包括：
向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
处理所述接入网设备发起的业务请求。
结合第三方面，在第三方面的第一种可能的实现方式中，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
结合第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
第四方面，本发明实施例提供一种用户设备UE，包括：
接收模块，用于从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；
选择模块，用于根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
发送模块，用于将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
结合第四方面，在第四方面的第一种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述选择模块，具体用于从所述至少一个DCN中选择类型与用户设备 UE的业务类型匹配的DCN作为所述待接入的DCN；
所述发送模块，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第四方面，在第四方面的第二种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；
所述选择模块，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
所述发送模块，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第四方面、第四方面的第一种至第二种中任一种可能的实现方式，在第四方面的第三种可能的实现方式中，所述发送模块，还用于向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；
所述接收模块，具体用于接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
结合第四方面，在第四方面的第四种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述选择模块，具体用于根据第一预设规则确定待接入的公共陆地移动网络PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
所述发送模块，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第四方面，在第四方面的第五种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述选择模块，具体用于从所述至少一个DCN中选出类型与UE的业务 类型匹配的DCN作为所述待接入的DCN；根据所述待接入的DCN的类型确定待接入的PLMN；
所述发送模块，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第四方面，在第四方面的第六种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
所述选择模块，具体用于根据第一预设规则确定待接入的PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
所述发送模块，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第四方面，在第四方面的第七种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
所述选择模块，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；
所述发送模块，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第四方面、第四方面的第四种至第七种中任一种可能的实现方式，在第四方面的第八种可能的实现方式中，所述接收模块，具体用于接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
结合第四方面的第四种至第八种中任一种可能的实现方式，在第四方面的第九种可能的实现方式中，所述发送模块，还用于向所述接入网设备请求 建立无线连接。
结合第四方面、第四方面的第一种至第九种中任一种可能的实现方式，在第四方面的第十种可能的实现方式中，所述选择模块，还用于当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
第五方面，本发明实施例提供一种接入网设备，包括：
发送模块，用于向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
接收模块，用于接收所述UE发送的所述待接入的DCN的信息；
确定模块，用于根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
结合第五方面，在第五方面的第一种可能的实现方式中，所述待接入的DCN的信息包括所述待接入的DCN的类型；
所述确定模块，具体用于根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
结合第五方面，在第五方面的第二种可能的实现方式中，所述确定模块，还用于当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
结合第五方面，在第五方面的第三种可能的实现方式中，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；
所述确定模块，具体用于根据所述待接入的DCN的DCN ID和所述第二 DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
结合第五方面的第三种可能的实现方式，在第五方面的第四种可能的实现方式中，所述确定模块，还用于当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
结合第五方面、第五方面的第一种至第四种中任一种可能的实现方式，在第五方面的第五种可能的实现方式中，所述接收模块，还用于从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
结合第五方面的第五种可能的实现方式，在第五方面的第六种可能的实现方式中，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
结合第五方面、第五方面的第一种至第二种、第五种至第六中任一种可能的实现方式，在第五方面的第七种可能的实现方式中，所述接收模块，还用于接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；
所述发送模块，具体用于根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
结合第五方面、第五方面的第三种至第六种中任一种可能的实现方式，在第五方面的第八种可能的实现方式中，所述发送模块，具体用于向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
第六方面，本发明实施例提供一种核心网设备，包括：
发送模块，用于向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
处理模块，用于处理所述接入网设备发起的业务请求。
结合第六方面，在第六方面的第一种可能的实现方式中，所述第二 DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
结合第六方面的第一种可能的实现方式，在第六方面的第二种可能的实现方式中，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
第七方面，本发明实施例提供一种用户设备UE，包括：
接收器，用于从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；
处理器，用于根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
发送器，用于将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
结合第七方面，在第七方面的第一种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述处理器，具体用于从所述至少一个DCN中选择类型与用户设备UE的业务类型匹配的DCN作为所述待接入的DCN；
所述发送器，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第七方面，在第七方面的第二种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；
所述处理器，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
所述发送器，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第七方面、第七方面的第一种至第二种中任一种可能的实现方式，在第七方面的第三种可能的实现方式中，所述发送器，还用于向所述接入网 设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；
所述接收器，具体用于接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
结合第七方面，在第七方面的第四种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述处理器，具体用于根据第一预设规则确定待接入的公共陆地移动网络PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
所述发送器，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第七方面，在第七方面的第五种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型；
所述处理器，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN作为所述待接入的DCN；根据所述待接入的DCN的类型确定待接入的PLMN；
所述发送器，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
结合第七方面，在第七方面的第六种可能的实现方式中，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
所述处理器，具体用于根据第一预设规则确定待接入的PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
所述发送器，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第七方面，在第七方面的第七种可能的实现方式中，所述第一 DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
所述处理器，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；
所述发送器，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
结合第七方面、第七方面的第四种至第七种中任一种可能的实现方式，在第七方面的第八种可能的实现方式中，所述接收器，具体用于接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
结合第七方面的第四种至第八种中任一种可能的实现方式，在第七方面的第九种可能的实现方式中，所述发送器，还用于向所述接入网设备请求建立无线连接。
结合第七方面、第七方面的第一种至第九种中任一种可能的实现方式，在第七方面的第十种可能的实现方式中，所述处理器，还用于当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
第八方面，本发明实施例提供一种接入网设备，包括：
发送器，用于向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
接收器，用于接收所述UE发送的所述待接入的DCN的信息；
处理器，用于根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
结合第八方面，在第八方面的第一种可能的实现方式中，所述待接入的DCN的信息包括所述待接入的DCN的类型；
所述处理器，具体用于根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
结合第八方面的第一种可能的实现方式，在第八方面的第二种可能的实现方式中，所述处理器，还用于当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
结合第八方面，在第八方面的第三种可能的实现方式中，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；
所述处理器，具体用于根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
结合第八方面的第三种可能的实现方式，在第八方面的第四种可能的实现方式中，所述处理器，还用于当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
结合第八方面、第八方面的第一种至第四种中任一种可能的实现方式，在第八方面的第五种可能的实现方式中，所述接收器，还用于从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
结合第八方面的第五种可能的实现方式，在第八方面的第六种可能的实现方式中，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
结合第八方面、第八方面的第一种至第二种、第五种至第六种中任一种 可能的实现方式，在第八方面的第七种可能的实现方式中，所述接收器，还用于接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；
所述发送器，具体用于根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
结合第八方面、第八方面的第三种至第六种中任一种可能的实现方式，在第八方面的第八种可能的实现方式中，所述发送器，具体用于向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
第九发面，本发明实施例提供一种核心网设备，包括：
发送器，用于向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
处理器，用于处理所述接入网设备发起的业务请求。
结合第九方面，在第九方面的第一种可能的实现方式中，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
结合第九方面的第一种可能的实现方式，在第九方面的第二种可能的实现方式中，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
第十方面，本发明实施例提供一种通信系统，包括：用户设备UE、接入网设备以及核心网设备，其中，所述UE采用第四方面、第四方面的第一种至第十种中任一种可能的实现方式所述的UE，所述接入网设备采用第五方面、第五方面的第一种至第八种中任一种可能的实现方式所述的设备，所述核心网设备采用采用第六方面、第六方面的第一种至第二种中任一种可能的实现方式。
第十一方面，本发明实施例提供一种通信系统，包括：用户设备UE、接入网设备以及核心网设备，其中，所述UE采用第七方面、第七方面的第一种至第十种中任一种可能的实现方式所述的UE，所述接入网设备采用第八方面、第八五方面的第一种至第八种中任一种可能的实现方式所述的设备，所述核心网设备采用采用第九方面、第九方面的第一种至第二种中任一种可能的实现方式。
本发明实施例核心网选择方法、装置及系统，通过UE根据自身的业务 类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明核心网选择方法的一个实施例的流程图；
图2为本发明核心网选择方法的另一个实施例的流程图；
图3为本发明核心网选择方法的再一个实施例的流程图；
图4为本发明核心网选择方法的又一个实施例的流程图；
图5为本发明核心网选择方法的第五个实施例的流程图；
图6为本发明核心网选择方法的第六个实施例的流程图；
图7为本发明核心网选择方法的第七个实施例的流程图；
图8为本发明核心网选择方法的第八个实施例的流程图；
图9为本发明核心网选择方法的第九个实施例的流程图；
图10为本发明核心网选择方法的第十个实施例的流程图；
图11为本发明UE的一个实施例的结构示意图；
图12为本发明接入网设备的一个实施例的结构示意图；
图13为本发明核心网设备的一个实施例的结构示意图；
图14为本发明UE的另一个实施例的结构示意图；
图15为本发明接入网设备的另一个实施例的结构示意图；
图16为本发明核心网设备的另一个实施例的结构示意图；
图17为本发明通信系统的一个实施例的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述， 显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1为本发明核心网选择方法的一个实施例的流程图，如图1所示，本实施例的方法可以包括：
步骤101、从接入网设备获取第一DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；
核心网选择方法适用于对核心网进行了网络分片的通信系统，单个网络分片对应的DCN可以定义为支持特定场景的通信业务需求的功能实体的集合，例如，4G网的移动管理实体(Mobility Management Entity，简称：MME)，3G网的服务GPRS支持节点(Serving GPRS Support Node，简称：SGSN)。本实施例的执行主体可以是用户设备(User Equipment，简称：UE)，UE从接入网设备获取第一DCN信息，该接入网设备可以是演进型基站(evolved Node B，简称：eNB)、无线接入网节点(Radio Access Network Node，简称：RAN Node)等，基于通信系统的部署和各DCN的功能，接入网设备可以接入一个或多个DCN，在接入网设备和这些DCN的预先配置过程中，接入网设备可以获取到这些DCN的信息，接入网设备再将这些DCN的信息发送给UE。
步骤102、根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
UE根据从接入网设备获取的第一DCN信息可以获知备选的DCN有哪些，即可以从这些备选的DCN中选出一个作为待接入的DCN，UE选择待接入的DCN的方法例如：可以根据业务类型，包括UE自身的设备类型、UE的使用类型等，从备选的DCN中选出业务类型相匹配的待接入的DCN，例如，UE的使用类型为普通网络业务，则UE选出的待接入的DCN就需要主要负责移动宽带网的相关业务。UE还可以从备选的DCN中选取优先级最高的DCN作为待接入的DCN，或随机的选取一个作为待接入的DCN。
步骤103、将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
UE在选出待接入的DCN后，将其信息发送给接入网设备，这样接入网 设备就可以结合待接入的DCN所属的DCN功能实体组标识确定核心网设备。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图2为本发明核心网选择方法的另一个实施例的流程图，如图2所示，本实施例的方法可以包括：
步骤201、向UE发送第一DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
本实施例与图1所示方法实施例相对应，执行主体为上述接入网设备。接入网设备向UE发送包含了接入网设备可接入的至少一个DCN的信息的第一DCN信息，以使UE执行上述步骤102，选出待接入的DCN。
步骤202、接收所述UE发送的所述待接入的DCN的信息；
步骤203、根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
接入网设备获取到待接入的DCN的信息后，根据该待接入的DCN的信息从预先配置的第二DCN信息中选出最终核心网设备，第二DCN信息是接入网设备和接入网设备可接入的至少一个DCN预先配置好的，其中包括所述至少一个DCN的信息，例如，类型、DCN标识(identity，简称：ID)、优先级、DCN功能实体组标识等，接入网设备从第二DCN信息中找出与待接入的DCN的信息相匹配的核心网设备，作为核心网设备。此后核心网设备就可以将UE的业务请求发送给该核心网设备进行处理。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图3为本发明核心网选择方法的再一个实施例的流程图，如图3所示，本实施例的方法可以包括：
步骤301、向接入网设备发送第二DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
本实施例与图2所示方法实施例相对应，执行主体为上述核心网设备。在接入网设备确定核心网设备之前，核心网设备要和接入网设备进行配置DCN信息的交互，接入网设备与可接入的DCN中的核心网设备进行通信，核心网设备将其DCN信息发送给接入网设备，因此在接入设备即可形成一个或多个DCN的信息列表。
步骤302、处理所述接入网设备发起的业务请求。
核心网设备在与接入网设备建立链接后，即可处理接入网设备发送的业务请求。
本实施例，通过核心网设备和接入网设备预先配置DCN信息，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
下面采用几个具体的实施例，对图1～图3所示方法实施例的技术方案进行详细说明。
图4为本发明核心网选择方法的又一个实施例的流程图，如图4所示，本实施例的方法适用于包括UE、RAN Node、MME/SGSN以及归属签约用户服务器(Home Subscriber Server，简称：HSS)的通信系统，其中，MME/SGSN为上述核心网设备，HSS为提供核心网用户面功能的核心网设备，需要说明的是，本实施例的方法可以适用于任何包含UE、接入网设备、核心网设备的通信系统，为了便于对方法实施例进行描述，上述通信系统仅作为一种示例。本实施例的方法可以包括：
s401、MME/SGSN向RAN Node发送第二DCN信息，所述第二DCN信息包括RAN Node可接入的至少一个DCN的类型和DCN功能实体组标识；
本实施例中，MME/SGSN向RAN Node配置第二DCN信息，该第二DCN信息中可以包括该RAN Node可接入的一个或多个DCN的信息的列表，每个列表项包括以下属性信息：DCN类型(DCN Type)和DCN功能实体组标识(例如，MME组标识(Group ID)、SGSN Group ID或缺省NRI等)。其中，DCN Type表示该DCN所支持的特定通信业务或通信场景，例如：DCN Type为蜂窝物联网(CIoT)、超可靠通信(Ultra-Reliable Communication，简称：URC)网络、移动宽带网(MBB)等。
s402、UE向RAN Node发送第一消息，所述第一消息用于指示UE的 DCN选择能力；
第一消息可以是无线资源控制(Radio Resource Control，简称：RRC)连接请求消息(RRC Connection Request)，UE向RAN Node发送RRC Connection Request，可以在其中携带上表示UE的DCN选择能力的指示信息，以表明UE具有DCN选择能力。
s403、RAN Node向UE发送第二消息，所述第二消息包括第一DCN信息，所述第一DCN信息包括所述RAN Node可接入的至少一个DCN的类型；
第二消息可以是RRC连接建立消息(RRC Connection Setup)，RAN Node在回复的RRC Connection Setup中携带上第一DCN信息，其中包括RAN Node可接入的至少一个DCN的类型。
s404、UE从所述RAN Node可接入的至少一个DCN中选择类型与业务类型匹配的DCN作为待接入的DCN；
UE根据业务类型，包括UE的使用类型、UE的设备类型，选择与该业务类型相匹配的DCN的类型，例如：UE用作普通仪表或普通传感器，则与该业务类型相匹配的DCN的类型为CIoT；UE用作交通工具或远程医疗，则与该业务类型相匹配的DCN的类型为URC；UE用作娱乐或监控的普通网络业务，则与该业务类型相匹配的DCN的类型为MBB。UE可以根据与业务类型相匹配的DCN的类型确定出待接入的DCN。
另外，当UE没有找出类型与业务类型匹配的DCN时，可以选择预设的默认DCN作为待接入的DCN，该默认DCN可以由MME/SGSN预先配置给RAN Node，再由RAN Node通过RRC Connection Setup发送给UE；或者，UE可以向RAN Node发送终止接入请求，终止本次连接请求过程；或者，UE可以执行PLMN重选和/或小区重选等过程，从其他RAN Node获取第一DCN信息。
s405、UE将所述待接入的DCN的类型发送RAN Node；
UE可以将待接入的DCN的类型封装在RRC连接建立完成消息(RRC Connection Setup Complete)中发送给RAN Node。另外，RRC Connection Setup Complete中还可以携带非接入层(Non-Access Stratum，简称：NAS)消息，例如，附着(Attach)、跟踪区更新(Tracking Area Update，简称： TAU)或路由区更新(Route Area Update，简称：RAU)请求消息、业务请求(Service Request)消息。
s406、RAN Node根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；
RAN Node根据DCN Type和所述第二DCN信息，可以确定出与DCN Type对应的DCN功能实体组标识。若第二DCN信息中没有与DCN Type对应的DCN功能实体组标识，RAN Node可以选择默认DCN，或者向UE发送RRC连接拒绝消息(RRC Connection Reject)，并在RRC Connection Reject中携带拒绝原因为“没有可用的DCN(No DCN available)”，不再执行后续步骤。
s407、RAN Node根据所述DCN功能实体组标识和第二预设规则确定MME/SGSN；
RAN Node进一步的选择DCN功能实体组标识对应的DCN中的一个功能实体作为核心网设备，例如：4G中MME，或，3G中SGSN。第二预设规则例如可以包括：依据DCN功能实体组标识对应的DCN功能实体组内的各功能实体的荷载情况，依据荷载均衡(Load Balancing)原则选择荷载较低的功能实体作为用于处理UE业务请求的核心网设备。
s408、RAN Node向MME/SGSN发起业务请求；
s409、由UE、RAN Node、MME/SGSN以及HSS共同完成业务处理。
RAN Node将RRC Connection Setup Complete消息中的NAS消息转发给确定出的MME/SGSN，该MME/SGSN处理NAS消息，向待接入的DCN中的HSS发送创建会话消息。MME/SGSN和HSS、RAN Node和UE共同完成NAS消息对应的NAS过程。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图5为本发明核心网选择方法的第五个实施例的流程图，如图5所示，本实施例的方法适用于包括UE、RAN Node、MME/SGSN以及HSS的通信系统，其中，MME/SGSN为上述核心网设备，HSS为提供核心网用户面功能的核心网设备，需要说明的是，本实施例的方法可以适用于任何包含 UE、接入网设备、核心网设备的通信系统，为了便于对方法实施例进行描述，上述通信系统仅作为一种示例。本实施例的方法可以包括：
s501、MME/SGSN向RAN Node发送第二DCN信息，所述第二DCN信息包括RAN Node可接入的至少一个DCN的类型、DCN ID、优先级以及DCN功能实体组标识；
本实施例中，MME/SGSN向RAN Node配置第二DCN信息，该第二DCN信息中可以包括该RAN Node可接入的一个或多个DCN的信息的列表，每个列表项包括以下属性信息：DCN类型(DCN Type)和DCN功能实体组标识(例如，MME组标识(Group ID)、SGSN Group ID或缺省NRI等)。其中，DCN Type表示该DCN所支持的特定通信业务或通信场景，例如：DCN Type为蜂窝物联网(CIoT)、超可靠通信(Ultra-Reliable Communication，简称：URC)网络、移动宽带网(MBB)等。DCN ID可以定义为DCN在一个公共陆地移动网络(Public Land Mobile Network，简称：PLMN)内唯一的标识，例如，1，2，……，或者，DCN ID也可以定义为DCN在全球唯一的ID，例如：DCN ID＝PLMN ID+DCN local ID＝MCC+MNC+DCN local ID，这里DCN Local ID为DCN在一个PLMN内唯一的标识。例如：MCC＝460，MNC＝10，DCN Local ID＝1，则DCN ID＝460101。DCN Type与DCN ID的映射可以是1对1，或1对多，当1个DCN Type对应多个DCN ID时，每个DCN ID可以进一步对应一个优先级级别。表1为第二DCN信息的示意表。
表1
DCN ID DCN Type 优先级 DCN功能实体组标识
1 CIoT 1 MMEGI：1100..00
2 CIoT 2 MMEGI：1100..01
3 MBB 1 MMEGI：1011..01
s502、UE向RAN Node发送第一消息，所述第一消息用于指示UE的DCN选择能力；
s502与上述s402原理类似，此处不再赘述。
s503、RAN Node向UE发送第二消息，所述第二消息包括第一DCN信息，所述第一DCN信息包括所述RAN Node可接入的至少一个DCN的类 型、DCN ID以及优先级；
s503与上述s403原理类似，区别只在于本实施例中第一DCN信息中还包括RAN Node可接入的至少一个DCN的DCN ID和优先级，此处不再赘述。
s504、UE从所述至少一个DCN中选出类型与业务类型匹配的一个或多个DCN；
UE根据业务类型，包括UE的使用类型、UE的设备类型，选择与该业务类型相匹配的DCN的类型，例如：UE用作普通仪表或普通传感器，则与该业务类型相匹配的DCN的类型为CIoT；UE用作交通工具或远程医疗，则与该业务类型相匹配的DCN的类型为URC；UE用作娱乐或监控的普通网络业务，则与该业务类型相匹配的DCN的类型为MBB。UE可以根据与业务类型相匹配的DCN的类型确定出一个或多个DCN，一个DCN时表示DCN Type与DCN ID的映射是一对一，多个DCN时表示DCN Type与DCN ID的映射是一对多。
s505a、当有一个DCN的类型与所述业务类型匹配时，UE将所述一个DCN确定为待接入的DCN；
如果只有一个DCN的类型与所述业务类型匹配，UE直接获取该DCN的DCN ID即可。
s505b、当有多个DCN的类型与所述业务类型匹配时，UE根据所述优先级从所述多个DCN中选择待接入的DCN；
当有多个DCN的类型与业务类型匹配时，每个DCN的DCN ID可以设置优先级，UE可以在确定DCN Type后，进一步依据优先级选择DCN ID。例如：DCN Type＝CIoT，对应的DCN ID＝460101，460102，其中DCN ID＝460101的DCN为商用网，优先级为1(高优先级)，DCN ID＝460102为实验网，优先级为2(低优先级)，UE可以根据业务类型继续选出相匹配的优先级级别的DCN作为待接入的DCN。DCN的优先级可以更改，例如：当DCN ID＝460102的DCN测试完成，升级为商用网，而且比DCN ID＝460101的DCN具有更好的性能，此时DCN ID＝460102的优先级可以修改为1，DCN ID＝460101的优先级可以修改为2。
s505a和s505b为二选一的步骤，由类型与业务类型匹配的DCN的个数 确定执行哪个步骤。
另外，当UE没有找出类型与业务类型匹配的DCN时，可以选择预设的默认DCN作为待接入的DCN，该默认DCN可以由MME/SGSN预先配置给RAN Node，再由RAN Node通过RRC Connection Setup发送给UE；或者，UE可以向RAN Node发送终止接入请求，终止本次连接请求过程；或者，UE可以执行PLMN重选和/或小区重选等过程，从其他RAN Node获取第一DCN信息。
s506、UE将所述待接入的DCN的DCN ID发送RAN Node；
s506和上述s405原理类似，区别只在于本实施例中UE是将待接入的DCN的DCN ID封装在RRC Connection Setup Complete中发送给RAN Node，此处不再赘述。
s507、RAN Node根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN的DCN ID对应的DCN功能实体组标识；
s507和上述s406原理类似，区别只在于本实施例中RAN Node根据待接入的DCN的DCN ID确定DCN功能实体组标识，此处不再赘述。
s508、RAN Node根据所述DCN功能实体组标识和第二预设规则确定MME/SGSN；
s508和上述s407原理类似，此处不再赘述。
s509、RAN Node向MME/SGSN发起业务请求；
s510、由UE、RAN Node、MME/SGSN以及HSS共同完成业务处理。
s509～s510和上述s408～s409原理类似，此处不再赘述。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图6为本发明核心网选择方法的第六个实施例的流程图，如图6所示，本实施例的方法适用于包括UE、RAN Node、MME/SGSN以及HSS的通信系统，其中，MME/SGSN为上述核心网设备，HSS为提供核心网用户面功能的核心网设备，需要说明的是，本实施例的方法可以适用于任何包含UE、接入网设备、核心网设备的通信系统，为了便于对方法实施例进行描述，上述通信系统仅作为一种示例。本实施例的方法可以包括：
s601、MME/SGSN向RAN Node发送第二DCN信息，所述第二DCN信息包括RAN Node可接入的至少一个DCN的类型和DCN功能实体组标识；
s601与上述s401原理类似，此处不再赘述。
s602、RAN Node向UE发送第三消息，所述第三消息包括第一DCN信息，所述第一DCN信息包括所述RAN Node可接入的至少一个DCN的类型；
第三消息可以是RAN Node发送的广播消息，其中包含RAN Node可接入的至少一个DCN的类型。
UE依据广播消息执行PLMN选择和待接入的DCN的选择可以有以下两种实现方式：
s603a、UE根据第一预设规则确定待接入的PLMN；
第一预设规则例如可以包括：UE优先选择前一次注册成功的PLMN(Registered PLMN)或者与Registered PLMN等效的PLMN，其次选择UE归属地的PLMN或者与归属地的PLMN等效的PLMN，再次是用户或运营商配置的优选的PLMN。
s604a、UE从所述待接入的PLMN支持的至少一个DCN中选择类型与业务类型匹配的DCN作为待接入的DCN；
UE首先执行PLMN选择过程，从多个PLMN ID中选择一个PLMN ID，然后从该PLMN支持的至少一个DCN中选择DCN Type与业务类型匹配的DCN作为待接入的DCN，UE选择待接入的DCN的过程与上述s404原理类似，此处不再赘述。此时DCN Type可以作为广播消息中的每个PLMN的信息中包含的参数，即每个PLMN的信息可包括{PLMN ID,{DCN Type1，DCN Type2},…}。
s603b、UE从所述RAN Node可接入的至少一个DCN中选出类型与业务类型匹配的DCN作为待接入的DCN；
s604b、UE根据所述待接入的DCN的类型确定待接入的PLMN；
UE首先从RAN Node可接入的至少一个DCN的DCN Type中选择类型与业务类型匹配的DCN，UE选择类型与业务类型匹配的DCN的过程与上述s404原理类似，此处不再赘述。然后UE从该支持选出的DCN的DCN Type的PLMN中选出一个作为待接入的PLMN。此时广播消息中每个DCN的信 息可包括{DCN Type,{PLMN ID1,PLMN ID2},…}。例如：UE首先根据使用的类型，例如，UE用作普通仪表，选择DCN Type＝CIoT的DCN，再从支持DCN Type＝CIoT的PLMN ID1和PLMN ID2中选择PLMN ID2。
s603a～s604a和s603b～s604b为二选一的步骤，通过这两种方法UE都可以实现PLMN选择和待接入的DCN的选择。
另外，当UE没有找出类型与业务类型匹配的DCN时，可以选择预设的默认DCN作为待接入的DCN，该默认DCN可以由MME/SGSN预先配置给RAN Node，再由RAN Node通过RRC Connection Setup发送给UE；或者，UE可以向RAN Node发送终止接入请求，终止本次连接请求过程；或者，UE可以执行PLMN重选和/或小区重选等过程，从其他RAN Node获取第一DCN信息。
s605、UE向RAN Node请求建立无线连接；
UE向RAN Node请求建立无线连接即是执行小区选择过程，选择上述步骤中选出的PLMN下的小区，并执行随机接入过程，与RAN Node建立连接，UE可以向RAN Node发送RRC Connection Request，RAN Node回复RRC Connection Setup。
s606、UE将所述待接入的DCN的类型发送RAN Node；
s606与上述s405原理类似，此处不再赘述。
s607、RAN Node根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；
s607与上述s406原理类似，此处不再赘述。
s608、RAN Node根据所述DCN功能实体组标识和第二预设规则确定MME/SGSN；
s608与上述s407原理类似，此处不再赘述。
s609、RAN Node向MME/SGSN发起业务请求；
s610、由UE、RAN Node、MME/SGSN以及HSS共同完成业务处理。
s609～s610与上述s408～s409原理类似，此处不再赘述。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图7为本发明核心网选择方法的第七个实施例的流程图，如图7所示，本实施例的方法适用于包括UE、RAN Node、MME/SGSN以及HSS的通信系统，其中，MME/SGSN为上述核心网设备，HSS为提供核心网用户面功能的核心网设备，需要说明的是，本实施例的方法可以适用于任何包含UE、接入网设备、核心网设备的通信系统，为了便于对方法实施例进行描述，上述通信系统仅作为一种示例。本实施例的方法可以包括：
s701、MME/SGSN向RAN Node发送第二DCN信息，所述第二DCN信息包括RAN Node可接入的至少一个DCN的类型、DCN ID、优先级以及DCN功能实体组标识；
s701与上述s501原理类似，此处不再赘述。
s702、RAN Node向UE发送第三消息，所述第三消息包括第一DCN信息，所述第一DCN信息包括所述RAN Node可接入的至少一个DCN的类型、DCN ID以及优先级；
s702与上述s602原理类似，区别仅在于本实施例中第一DCN信息还包括RAN Node可接入的至少一个DCN的DCN ID和优先级，此处不再赘述。
UE依据广播消息执行PLMN选择和待接入的DCN的选择可以有以下两种实现方式：
s703a、UE根据第一预设规则确定待接入的PLMN；
s704a、UE从所述待接入的PLMN支持的至少一个DCN中选择类型与业务类型匹配的一个或多个DCN；
s704a与上述s604a类似，此处不再赘述。
s705a、当有一个DCN的类型与所述业务类型匹配时，UE将所述一个DCN确定为待接入的DCN；
s705b、当有多个DCN的类型与所述业务类型匹配时，UE根据所述优先级从所述多个DCN中选择待接入的DCN；
UE首先执行PLMN选择过程，从多个PLMN ID中选择一个PLMN ID，然后从该PLMN支持的至少一个DCN中选择DCN Type和DCN ID，UE选择DCN Type和DCN ID的过程与上述s504～s505b原理类似，此处不再赘述。此时DCN ID可以作为广播消息中的每个PLMN的信息中包含的参数，即每个PLMN的信息可包括{PLMN ID,{DCN Type1,DCN ID1,DCN ID2}, {DCN Type2,DCN ID3,DCN ID4},…}。
s703c、UE从所述RAN Node可接入的至少一个DCN中选出类型与业务类型匹配的DCN；
s704c、UE根据所述类型与业务类型匹配的DCN的类型确定待接入的PLMN；
s705c、UE根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为待接入的DCN；
UE首先从RAN Node可接入的至少一个DCN的DCN Type中选择类型与业务类型匹配的DCN，UE选择类型与业务类型匹配的DCN的过程与上述s404原理类似，此处不再赘述。然后UE从该支持选出的DCN的DCN Type的PLMN中选出一个作为待接入的PLMN。UE再根据优先级从待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为待接入的DCN。同一PLMN ID对应的DCN ID可以按照优先级顺序排列，UE优先选择优先级高的DCN ID。此时广播消息中每个DCN信息可包括{DCN Type,{PLMN ID1,DCN ID1,DCN ID2},{PLMN ID2,DCN ID3,DCN ID4},…}。中此时广播消息中每个DCN的信息可包括{DCN Type,{PLMN ID1,PLMN ID2},…}。例如，UE用作普通仪表，选择DCN Type＝CIoT的DCN，再从支持DCN Type＝CIoT的PLMN ID1和PLMN ID2中选择PLMN ID2，再从PLMN ID2支持的DCN中选择DCN ID3。
s703a～s705b和s703c～s705c为二选一的步骤，通过这两种方法UE都可以实现PLMN选择和待接入的DCN的选择。
另外，当UE没有找出类型与业务类型匹配的DCN时，可以选择预设的默认DCN作为待接入的DCN，该默认DCN可以由MME/SGSN预先配置给RAN Node，再由RAN Node通过RRC Connection Setup发送给UE；或者，UE可以向RAN Node发送终止接入请求，终止本次连接请求过程；或者，UE可以执行PLMN重选和/或小区重选等过程，从其他RAN Node获取第一DCN信息。
s706、UE向RAN Node请求建立无线连接；
s706与上述s605原理类似，此处不再赘述。
s707、UE将所述待接入的DCN的DCN ID发送RAN Node；
s707与上述s506原理类似，此处不再赘述。
s708、RAN Node根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN的DCN ID对应的DCN功能实体组标识；
s708与上述s507原理类似，此处不再赘述。
s709、RAN Node根据所述DCN功能实体组标识和第二预设规则确定MME/SGSN；
s709与上述s407原理类似，此处不再赘述。
s710、RAN Node向MME/SGSN发起业务请求；
s711、由UE、RAN Node、MME/SGSN以及HSS共同完成业务处理。
s710～s711与上述s408～s409原理类似，此处不再赘述。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图8为本发明核心网选择方法的第八个实施例的流程图，如图8所示，本实施例的方法适用于包括UE、RAN Node、C-SGN以及P-GW/AS的通信系统，其中，C-SGN为上述核心网设备，P-GW/AS为提供核心网用户面功能的核心网设备，需要说明的是，本实施例的方法可以适用于任何包含UE、接入网设备、核心网设备的通信系统，为了便于对方法实施例进行描述，上述通信系统仅作为一种示例。本实施例的方法可以包括：
s801、UE向RAN Node发送第一消息，所述第一消息包含UE选择的待接入的DCN的类型；
UE向RAN Node发送RRC Connection Request，其中包含DCN Type＝CIoT的信息。RRC Connection Request中还携带应用层小数据，该应用层小数据可以封装在NAS消息中。
s802、RAN Node根据所述待接入的DCN的类型和第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；
RAN Node根据DCN Type＝CIoT，DCN的类型和DCN功能实体组标识的映射信息，确定DCN Type＝CIoT的待接入的DCN对应的DCN功能实体组标识。若映射信息中没有与DCN Type＝CIoT对应的DCN功能实体组标识，RAN Node可以选择默认DCN，或者向UE发送RRC连接拒绝消息 (RRC Connection Reject)，并在RRC Connection Reject中携带拒绝原因为“没有可用的DCN(No DCN available)”，不再执行后续步骤。
s803、RAN Node根据所述DCN功能实体组标识和第二预设规则确定C-SGN；
RAN Node进一步的选择DCN功能实体组标识对应的DCN中的一个功能实体作为核心网设备，例如：4G中MME，或，3G中SGSN。
s804、RAN Node向C-SGN发起业务请求；
s805、由UE、RAN Node、C-SGN以及P-GW/AS共同完成业务处理。
RAN Node提取RRC Connection Request消息中封装应用层小数据的NAS消息，发送给C-SGN。C-SGN将应用层小数据发送给分组数据网络网关(Packet Data Network Gateway，简称：P-GW)或应用服务器(Application Server，简称：AS)。
本实施例，通过UE根据自身的业务类型选择待接入的DCN，实现接入网设备对核心网设备的准确选择，提高接入网设备选择DCN的准确性，避免DCN重选过程中引起的通信信令增加和处理时延，提高通信效率。
图9为本发明核心网选择方法的第九个实施例的流程图，如图9所示，本实施例的方法适用于包括接入网设备和核心网设备的通信系统。本实施例的方法可以包括：
s901、核心网设备接收接入网设备发送的第五消息，所述第五消息用于指示所述接入网设备的DCN选择能力或者用于请求所述第二DCN信息；
第五消息为S1建立请求消息(S1Setup Request)或者为上行信息交换请求消息(Uplink Information Exchange Request)。
s902、核心网设备向接入网设备发送第六消息，所述第六消息包括所述第二DCN信息。
第六消息为S1建立响应消息(S1Setup Response)为上行信息交换响应消息(Uplink Information Exchange Response)。
图10为本发明核心网选择方法的第十个实施例的流程图，如图10所示，本实施例的方法适用于包括接入网设备和核心网设备的通信系统。本实施例的方法可以包括：
s1001、核心网设备向接入网设备发送第七消息，所述第七消息包括所 述第二DCN信息；
第七消息为移动管理实体MME配置更新消息(MME Configuration Update)为信息传输指示消息(Information Transfer Indication)。
s1002、核心网设备接收接入网设备根据所述第七消息发送的消息确认响应消息。
消息确认响应消息可以为MME配置更新确认响应(MME Configuration Update Acknowledge)或者信息传输确认(Information Transfer Confirmation)。
图11为本发明UE的一个实施例的结构示意图，如图11所示，本实施例的装置可以包括：接收模块11、选择模块12以及发送模块13，其中，接收模块11，用于从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；选择模块12，用于根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；发送模块13，用于将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
本实施例的装置，可以用于执行图1、4～8任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型；所述选择模块12，具体用于从所述至少一个DCN中选择类型与用户设备UE的业务类型匹配的DCN作为所述待接入的DCN；所述发送模块13，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；所述选择模块12，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；所述发送模块13，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
进一步的，所述发送模块13，还用于向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；所述接收模块11，具体用于接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型；所述选择模块12，具体用于根据第一预设规则确定待接入的公共陆地移动网络PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；所述发送模块13，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型；所述选择模块12，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN作为所述待接入的DCN；根据所述待接入的DCN的类型确定待接入的PLMN；所述发送模块13，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；所述选择模块12，具体用于根据第一预设规则确定待接入的PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；所述发送模块13，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；所述选择模块12，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；所述发送 模块13，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
进一步的，所述接收模块11，具体用于接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
进一步的，所述发送模块13，还用于向所述接入网设备请求建立无线连接。
进一步的，所述选择模块12，还用于当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
图12为本发明接入网设备的一个实施例的结构示意图，如图12所示，本实施例的装置可以包括：发送模块21、接收模块22以及确定模块23，其中，发送模块21，用于向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；接收模块22，用于接收所述UE发送的所述待接入的DCN的信息；确定模块23，用于根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
本实施例的装置，可以用于执行图2、4～10任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述待接入的DCN的信息包括所述待接入的DCN的类型；所述确定模块23，具体用于根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
进一步的，所述确定模块23，还用于当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或 者，当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
进一步的，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；所述确定模块23，具体用于根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
进一步的，所述确定模块23，还用于当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
进一步的，所述接收模块22，还用于从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
进一步的，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
进一步的，所述接收模块22，还用于接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；所述发送模块21，具体用于根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
进一步的，所述发送模块21，具体用于向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
图13为本发明核心网设备的一个实施例的结构示意图，如图13所示，本实施例的装置可以包括：发送模块31和处理模块32，其中，发送模块31，用于向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；处理模块32，用于处理所述接入网设备发起的业务请求。
本实施例的装置，可以用于执行图3、4～10任一方法实施例的技术方 案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
进一步的，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
图14为本发明UE的另一个实施例的结构示意图，如图14所示，本实施例的装置可以包括：接收器41、处理器42以及发送器43，其中，接收器41，用于从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；处理器42，用于根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；发送器43，用于将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
本实施例的装置，可以用于执行图1、4～8任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型；所述处理器42，具体用于从所述至少一个DCN中选择类型与用户设备UE的业务类型匹配的DCN作为所述待接入的DCN；所述发送器43，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；所述处理器42，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；所述发送器43，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
进一步的，所述发送器43，还用于向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；所述接收器41，具体用于接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第 一DCN信息。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型；所述处理器42，具体用于根据第一预设规则确定待接入的公共陆地移动网络PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；所述发送器43，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型；所述处理器42，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN作为所述待接入的DCN；根据所述待接入的DCN的类型确定待接入的PLMN；所述发送器43，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；所述处理器42，具体用于根据第一预设规则确定待接入的PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；所述发送器43，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
进一步的，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；所述处理器42，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；所述发送器43，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
进一步的，所述接收器41，具体用于接收所述接入网设备发送的第三消 息，所述第三消息包括所述第一DCN信息。
进一步的，所述发送器43，还用于向所述接入网设备请求建立无线连接。
进一步的，所述处理器42，还用于当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
图15为本发明接入网设备的另一个实施例的结构示意图，如图15所示，本实施例的装置可以包括：发送器51、接收器52以及处理器53，其中，发送器51，用于向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；接收器52，用于接收所述UE发送的所述待接入的DCN的信息；处理器53，用于根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
本实施例的装置，可以用于执行图2、4～10任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述待接入的DCN的信息包括所述待接入的DCN的类型；所述处理器53，具体用于根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
进一步的，所述处理器53，还用于当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
进一步的，所述待接入的DCN的信息包括所述待接入的DCN的DCN  ID；所述处理器53，具体用于根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
进一步的，所述处理器53，还用于当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
进一步的，所述接收器52，还用于从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
进一步的，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
进一步的，所述接收器52，还用于接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；所述发送器51，具体用于根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
进一步的，所述发送器51，具体用于向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
图16为本发明核心网设备的另一个实施例的结构示意图，如图16所示，本实施例的装置可以包括：发送器61和处理器62，其中，发送器61，用于向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；处理器62，用于处理所述接入网设备发起的业务请求。
本实施例的装置，可以用于执行图3、4～10任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
进一步的，所述第二DCN信息还包括所述至少一个DCN的DCN ID和 优先级。
图17为本发明通信系统的一个实施例的结构示意图，如图17所示，本实施例的系统包括：UE71、接入网设备72以及核心网设备73，其中，所述UE 71可以采用图11所示装置实施例的结构，其对应地，可以执行图1、图4～图8中任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。所述接入网设备72可以采用图12所示装置实施例的结构，其对应地，可以执行图2、图4～图10中任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。所述核心网设备73可以采用图13所示装置实施例的结构，其对应地，可以执行图3、图4～图10中任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
进一步的，图17所示的系统结构中所述UE 71可以采用图14所示装置实施例的结构，其对应地，可以执行图1、图4～图8中任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。所述接入网设备72可以采用图15所示装置实施例的结构，其对应地，可以执行图2、图4～图10中任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。所述核心网设备73可以采用图16所示装置实施例的结构，其对应地，可以执行图3、图4～图10中任一方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
在本发明所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述该作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元 中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本发明各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。上述描述的装置的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (71)

  1. 一种核心网选择方法，其特征在于，包括：
    从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；
    根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
    将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
  2. 根据权利要求1所述的方法，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
    从所述至少一个DCN中选择类型与用户设备UE的业务类型匹配的DCN作为所述待接入的DCN；
    所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
    将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  3. 根据权利要求1所述的方法，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；
    所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
    从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；
    当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
    所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
    将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  4. 根据权利要求1～3中任一项所述的方法，其特征在于，所述从接入网设备获取第一DCN信息之前，还包括：
    向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；
    所述从接入网设备获取第一DCN信息，包括：
    接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
  5. 根据权利要求1所述的方法，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
    根据第一预设规则确定待接入的公共陆地移动网络PLMN；
    从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
    所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
    将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  6. 根据权利要求1所述的方法，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
    从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
    根据所述待接入的DCN的类型确定待接入的PLMN；
    所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
    将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  7. 根据权利要求1所述的方法，其特征在于，所述第一DCN信息包括 所述至少一个DCN的类型、DCN ID以及优先级；
    所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
    根据第一预设规则确定待接入的PLMN；
    从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；
    当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
    所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
    将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  8. 根据权利要求1所述的方法，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
    所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，包括：
    从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；
    根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；
    根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；
    所述将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备，包括：
    将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  9. 根据权利要求1、5～8中任一项所述的方法，其特征在于，所述从接入网设备获取第一DCN信息，包括：
    接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
  10. 根据权利要求5～9中任一项所述的方法，其特征在于，所述将所述待接入的DCN的信息发送给所述接入网设备之前，还包括：
    向所述接入网设备请求建立无线连接。
  11. 根据权利要求1～10中任一项所述的方法，其特征在于，所述根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN，还包括：
    当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，
    当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，
    当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
  12. 一种核心网选择方法，其特征在于，包括：
    向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
    接收所述UE发送的所述待接入的DCN的信息；
    根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
  13. 根据权利要求12所述的方法，其特征在于，所述待接入的DCN的信息包括所述待接入的DCN的类型；
    所述根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，包括：
    根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；
    根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
  14. 根据权利要求13所述的方法，其特征在于，所述根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，还包括：
    当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，
    当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
  15. 根据权利要求12所述的方法，其特征在于，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；
    所述根据所述待接入的DCN的信息和预先配置的DCN信息确定核心网设备，包括：
    根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；
    根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
  16. 根据权利要求15所述的方法，其特征在于，所述根据所述待接入的DCN的信息和预先配置的DCN信息确定核心网设备，还包括：
    当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，
    当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
  17. 根据权利要求12～16中任一项所述的方法，其特征在于，所述向UE发送第一DCN信息之前，还包括：
    从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
  18. 根据权利要求17所述的方法，其特征在于，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
  19. 根据权利要求12～14、17～18中任一项所述的方法，其特征在于，所述向UE发送第一DCN信息之前，还包括：
    接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；
    所述向UE发送第一DCN信息，包括：
    根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第 一DCN信息。
  20. 根据权利要求12、15～18中任一项所述的方法，其特征在于，所述向UE发送第一DCN信息，包括：
    向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
  21. 一种核心网选择方法，其特征在于，包括：
    向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
    处理所述接入网设备发起的业务请求。
  22. 根据权利要求21所述的方法，其特征在于，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
  23. 根据权利要求22所述的方法，其特征在于，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
  24. 一种用户设备UE，其特征在于，包括：
    接收模块，用于从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；
    选择模块，用于根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
    发送模块，用于将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
  25. 根据权利要求24所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述选择模块，具体用于从所述至少一个DCN中选择类型与用户设备UE的业务类型匹配的DCN作为所述待接入的DCN；
    所述发送模块，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  26. 根据权利要求24所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；
    所述选择模块，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配 时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
    所述发送模块，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  27. 根据权利要求24～26中任一项所述的UE，其特征在于，所述发送模块，还用于向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；
    所述接收模块，具体用于接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
  28. 根据权利要求24所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述选择模块，具体用于根据第一预设规则确定待接入的公共陆地移动网络PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
    所述发送模块，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  29. 根据权利要求24所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述选择模块，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN作为所述待接入的DCN；根据所述待接入的DCN的类型确定待接入的PLMN；
    所述发送模块，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  30. 根据权利要求24所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
    所述选择模块，具体用于根据第一预设规则确定待接入的PLMN；从所 述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
    所述发送模块，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  31. 根据权利要求24所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
    所述选择模块，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；
    所述发送模块，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  32. 根据权利要求24、28～31中任一项所述的UE，其特征在于，所述接收模块，具体用于接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
  33. 根据权利要求28～32中任一项所述的UE，其特征在于，所述发送模块，还用于向所述接入网设备请求建立无线连接。
  34. 根据权利要求24～33中任一项所述的UE，其特征在于，所述选择模块，还用于当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
  35. 一种接入网设备，其特征在于，包括：
    发送模块，用于向用户设备UE发送第一专用核心网DCN信息，以使所 述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
    接收模块，用于接收所述UE发送的所述待接入的DCN的信息；
    确定模块，用于根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
  36. 根据权利要求35所述的设备，其特征在于，所述待接入的DCN的信息包括所述待接入的DCN的类型；
    所述确定模块，具体用于根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
  37. 根据权利要求36所述的设备，其特征在于，所述确定模块，还用于当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
  38. 根据权利要求35所述的设备，其特征在于，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；
    所述确定模块，具体用于根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
  39. 根据权利要求38所述的设备，其特征在于，所述确定模块，还用于当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
  40. 根据权利要求35～39中任一项所述的设备，其特征在于，所述接收 模块，还用于从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
  41. 根据权利要求40所述的设备，其特征在于，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
  42. 根据权利要求35～37、40～41中任一项所述的设备，其特征在于，所述接收模块，还用于接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；
    所述发送模块，具体用于根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
  43. 根据权利要求35、38～41中任一项所述的设备，其特征在于，所述发送模块，具体用于向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
  44. 一种核心网设备，其特征在于，包括：
    发送模块，用于向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
    处理模块，用于处理所述接入网设备发起的业务请求。
  45. 根据权利要求44所述的设备，其特征在于，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
  46. 根据权利要求45所述的设备，其特征在于，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
  47. 一种用户设备UE，其特征在于，包括：
    接收器，用于从接入网设备获取第一专用核心网DCN信息，所述第一DCN信息包括所述接入网设备可接入的至少一个DCN的信息；
    处理器，用于根据所述第一DCN信息从所述至少一个DCN中选择待接入的DCN；
    发送器，用于将所述待接入的DCN的信息发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的信息确定核心网设备。
  48. 根据权利要求47所述的设备，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述处理器，具体用于从所述至少一个DCN中选择类型与用户设备UE 的业务类型匹配的DCN作为所述待接入的DCN；
    所述发送器，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  49. 根据权利要求47所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN标识ID以及优先级；
    所述处理器，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
    所述发送器，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  50. 根据权利要求47～49中任一项所述的UE，其特征在于，所述发送器，还用于向所述接入网设备发送第一消息，所述第一消息用于指示UE的DCN选择能力；
    所述接收器，具体用于接收所述接入网设备根据所述第一消息发送的第二消息，所述第二消息包括所述第一DCN信息。
  51. 根据权利要求47所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述处理器，具体用于根据第一预设规则确定待接入的公共陆地移动网络PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的DCN作为所述待接入的DCN；
    所述发送器，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  52. 根据权利要求47所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型；
    所述处理器，具体用于从所述至少一个DCN中选出类型与UE的业务类 型匹配的DCN作为所述待接入的DCN；根据所述待接入的DCN的类型确定待接入的PLMN；
    所述发送器，具体用于将所述待接入的DCN的类型发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的类型确定所述核心网设备。
  53. 根据权利要求47所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
    所述处理器，具体用于根据第一预设规则确定待接入的PLMN；从所述待接入的PLMN支持的至少一个DCN中选择类型与UE的业务类型匹配的一个或多个DCN；当有一个DCN的类型与所述业务类型匹配时，将所述一个DCN确定为所述待接入的DCN；或者，当有多个DCN的类型与所述业务类型匹配时，根据所述优先级从所述多个DCN中选择所述待接入的DCN；
    所述发送器，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  54. 根据权利要求47所述的UE，其特征在于，所述第一DCN信息包括所述至少一个DCN的类型、DCN ID以及优先级；
    所述处理器，具体用于从所述至少一个DCN中选出类型与UE的业务类型匹配的DCN；根据所述类型与UE的业务类型匹配的DCN的类型确定待接入的PLMN；根据所述优先级从所述待接入的PLMN支持的至少一个DCN中选择优先级最高的DCN作为所述待接入的DCN；
    所述发送器，具体用于将所述待接入的DCN的DCN ID发送给所述接入网设备，以使所述接入网设备根据所述待接入的DCN的DCN ID确定所述核心网设备。
  55. 根据权利要求47、51～54中任一项所述的UE，其特征在于，所述接收器，具体用于接收所述接入网设备发送的第三消息，所述第三消息包括所述第一DCN信息。
  56. 根据权利要求51～55中任一项所述的UE，其特征在于，所述发送器，还用于向所述接入网设备请求建立无线连接。
  57. 根据权利要求47～56中任一项所述的UE，其特征在于，所述处理 器，还用于当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，选择预设的默认DCN作为所述待接入的DCN；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，向所述接入网设备发送终止接入请求；或者，当所述至少一个DCN中没有类型与所述业务类型匹配的DCN时，从其他接入网设备获取所述第一DCN信息。
  58. 一种接入网设备，其特征在于，包括：
    发送器，用于向用户设备UE发送第一专用核心网DCN信息，以使所述UE根据所述第一DCN信息选择待接入的DCN，所述第一DCN信息包括接入网设备可接入的至少一个DCN的信息；
    接收器，用于接收所述UE发送的所述待接入的DCN的信息；
    处理器，用于根据所述待接入的DCN的信息和预先配置的第二DCN信息确定核心网设备，并向所述核心网设备发起业务请求。
  59. 根据权利要求58所述的设备，其特征在于，所述待接入的DCN的信息包括所述待接入的DCN的类型；
    所述处理器，具体用于根据所述待接入的DCN的类型和所述第二DCN信息确定与所述待接入的DCN的类型对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
  60. 根据权利要求59所述的设备，其特征在于，所述处理器，还用于当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的类型和所述第二DCN信息没有确定出与所述待接入的DCN的类型对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
  61. 根据权利要求58所述的设备，其特征在于，所述待接入的DCN的信息包括所述待接入的DCN的DCN ID；
    所述处理器，具体用于根据所述待接入的DCN的DCN ID和所述第二DCN信息确定与所述待接入的DCN对应的DCN功能实体组标识；根据所述DCN功能实体组标识和第二预设规则确定所述核心网设备。
  62. 根据权利要求61所述的设备，其特征在于，所述处理器，还用于当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所 述待接入的DCN的DCN ID对应的DCN功能实体组标识时，确定预设的默认核心网设备作为所述核心网设备；或者，当根据所述待接入的DCN的DCN ID和所述第二DCN信息没有确定出与所述待接入的DCN的DCN ID对应的DCN功能实体组标识时，向所述UE发送第四消息，所述第四消息用于终止接入请求。
  63. 根据权利要求58～62中任一项所述的设备，其特征在于，所述接收器，还用于从核心网设备获取所述第二DCN信息，所述第二DCN信息包括所述至少一个DCN的类型和DCN功能实体组标识。
  64. 根据权利要求63所述的设备，其特征在于，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
  65. 根据权利要求58～60、63～64中任一项所述的设备，其特征在于，所述接收器，还用于接收所述UE发送的第一消息，所述第一消息用于指示所述UE的DCN选择能力；
    所述发送器，具体用于根据所述第一消息向所述UE发送第二消息，所述第二消息包括所述第一DCN信息。
  66. 根据权利要求58、61～64中任一项所述的设备，其特征在于，所述发送器，具体用于向所述UE发送第三消息，所述第三消息包括所述第一DCN信息。
  67. 一种核心网设备，其特征在于，包括：
    发送器，用于向接入网设备发送第二专用核心网DCN信息，以使所述接入网设备根据所述第二DCN信息确定核心网设备；
    处理器，用于处理所述接入网设备发起的业务请求。
  68. 根据权利要求67所述的设备，其特征在于，所述第二DCN信息包括至少一个DCN的类型和DCN功能实体组标识。
  69. 根据权利要求68所述的设备，其特征在于，所述第二DCN信息还包括所述至少一个DCN的DCN ID和优先级。
  70. 一种通信系统，其特征在于，包括：用户设备UE、接入网设备以及核心网设备，其中，所述UE采用权利要求24～34中任一项所述的UE，所述接入网设备采用权利要求35～43中任一项所述的设备，所述核心网设备采用权利要求44～46中任一项所述的设备。
  71. 一种通信系统，其特征在于，包括：用户设备UE、接入网设备以及核心网设备，其中，所述UE采用权利要求47～57中任一项所述的UE，所述接入网设备采用权利要求58～66中任一项所述的设备，所述核心网设备采用权利要求67～69中任一项所述的设备。
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