Method for determining control plane node, apparatus, and wireless communications system

Abstract

Embodiments of the present invention relate to the communications field, and provide a method for determining a control plane node, an apparatus, and a wireless communications system, so as to select, for UE, a control plane node corresponding to a network slice to which the UE belongs, thereby ensuring that the control plane node can provide a customized service for the UE. The method includes: obtaining, by UE, indication information, where the indication information is used to indicate a network slice to which the UE belongs; and sending, by the UE, an access stratum request message to a radio access network node, where the access stratum request message includes the indication information, and the access stratum request message is used to trigger the radio access network node to determine, based on the indication information, a control plane node corresponding to the network slice for the UE.

What is claimed is: 
     
         1 . A method for wireless communication, comprising:
 receiving, by a radio access network node, an access stratum message from a terminal, the access stratum message comprising indication information indicating a network slice, wherein the network slice is associated with a service type;   determining, by the radio access network node, based on the indication information, a control plane node corresponding to the network slice for the terminal.   
     
     
         2 . The method according to  claim 1 , wherein before the receiving, by a radio access network node, an access stratum message from the terminal, the method further comprising:
 sending, by a second control plane node, to the terminal, the indication information.   
     
     
         3 . The method according to  claim 2 , wherein the second control plane node and the control plane node corresponding to the network slice are the same. 
     
     
         4 . The method according to  claim 2 , wherein the method comprises:
 receiving by the second control plane node, a non-access stratum message from the terminal, wherein the non-access stratum message comprises an identifier of the terminal;   determining, by the second control plane node, the indication information based on subscription data of the terminal.   
     
     
         5 . The method according to  claim 4 , wherein the determining, by the second control plane node, the indication information based on subscription data of the terminal comprises: determining, by the second control plane node, the indication information based on the service type of a user equipment (UE) in the subscription data of the terminal. 
     
     
         6 . The method according to  claim 2 , further comprising:
 obtaining, by the terminal, the indication information from the second control plane node; and   sending, by the terminal, the access stratum message comprising the indication information to the radio access network node.   
     
     
         7 . The method according to  claim 1 , wherein the indication information is an identifier of the network slice or identifier information for indicating the identifier of the network slice. 
     
     
         8 . A system, comprising: a radio access network node and one or more control plane nodes,
 the radio access network node configured to:   receive an access stratum message from a terminal, the access stratum message comprising indication information indicating a network slice, wherein the network slice is associated with a service type; and   determine based on the indication information, a control plane node corresponding to the network slice for the terminal.   
     
     
         9 . The system according to  claim 8 , wherein the one a more control plane nodes comprises a second control plane node, the second control plane node is configured to send to the terminal, the indication information indicating the network slice. 
     
     
         10 . The system according to  claim 9 , wherein the second control plane node and the control plane node corresponding to the network slice are same. 
     
     
         11 . The system according to  claim 9 , wherein the second control plane node is configured to
 receive a non-access stratum message from the terminal, wherein the non-access stratum message comprises an identifier of the terminal;   determine the indication information based on subscription data of the terminal.   
     
     
         12 . The system according to  claim 9 , wherein the terminal is configured to obtain the indication information from the second control plane node; and send the access stratum message comprising the indication information to the radio access network node. 
     
     
         13 . The system according to  claim 8 , wherein the radio access network node is configured to:
 obtain, based on the indication information and a first mapping relationship, the control plane node corresponding to the network slice,   wherein the first mapping relationship comprises a mapping relationship between the network slice and the control plane node.   
     
     
         14 . The system according to  claim 8 , wherein:
 the indication information is an identifier of the network slice or identifier information indicating the identifier of the network slice.   
     
     
         15 . A method for wireless communication, comprising:
 obtaining, by a terminal, indication information indicating a network slice, wherein the network slice is associated with a service type; and   sending, by the terminal, an access stratum message to a radio access network node, wherein the access stratum message comprises the indication information.   
     
     
         16 . The method according to  claim 15 , wherein the indication information is used to enable the radio access network node to select a control plane node corresponding to the network slice for the terminal. 
     
     
         17 . The method according to  claim 16 , wherein the obtaining, by terminal, indication information comprises:
 receiving, by the terminal, the indication information from a second control plane node.   
     
     
         18 . The method according to  claim 17 , wherein the second control plane node and the control plane node corresponding to the network slice are the same. 
     
     
         19 . The method according to  claim 17 , wherein the indication information is determined by the second control node based on subscription data of the terminal. 
     
     
         20 . The method according to  claim 15 , wherein the indication information is pre-configured. 
     
     
         21 . The method according to  claim 15 , wherein the indication information is an identifier of the network slice or identifier information for indicating the identifier of the network slice. 
     
     
         22 . The method according to  claim 15 , wherein the access stratum message is a radio resource control (RRC) connection message. 
     
     
         23 . An apparatus, comprising:
 a non-transitory memory and at least one processor coupled to the memory, wherein the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to:   obtain indication information indicating a network slice, wherein the network slice is associated with a service type; and   send an access stratum message to a radio access network node, wherein the access stratum message comprises the indication information.   
     
     
         24 . The apparatus according to  claim 23 , wherein the indication information is used to enable the radio access network node to select a control plane node corresponding to the network slice for the terminal. 
     
     
         25 . The apparatus according to  claim 24 , wherein the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to:
 receive the indication information from a second control plane node.   
     
     
         26 . The apparatus according to  claim 25 , wherein the second control plane node and the control plane node corresponding to the network slice are same. 
     
     
         27 . The apparatus according to  claim 25 , wherein the indication information is determined by the second control node based on subscription data of the terminal. 
     
     
         28 . The apparatus according to  claim 23 , wherein the indication information is pre-configured. 
     
     
         29 . The apparatus according to  claim 23 , wherein the indication information is an identifier of the network slice or identifier information for indicating the identifier of the network slice. 
     
     
         30 . The apparatus according to  claim 23 , wherein the access stratum message is a radio resource control (RRC) connection message.