DCN processing method for PLMN, UE, and DCN serving node

A user equipment (UE), comprising a memory and at least one processor, wherein the memory is configured to store a program, and wherein the at least one processor is configured to invoke the program in the memory, wherein the program instructs the at least one processor to:

• obtain an identifier of an accessed public land mobile network (PLMN);
• determine that the accessed PLMN has corresponding selection assistance information of a dedicated core network (DCN) that serves the UE;
• and
• send an access request message to a radio access network (RAN) node, wherein the access request message comprises the selection assistance information of the DCN;
• wherein in determining that the accessed PLMN has the corresponding selection assistance information of a DCN that serves the UE the program further instructs the at least one processor to:
• obtain a correspondence between an identifier of a PLMN and selection assistance information of a DCN;
• and
• determine, according to the identifier of the accessed PLMN and the correspondence, that the accessed PLMN has the corresponding selection assistance information of the DCN that serves the UE.

A system for a network sharing scenario, comprising a user equipment (UE) and a radio access network (RAN) node, wherein:

• the UE is configured to:
• obtain an identifier of an accessed PLMN;
• determine that the accessed PLMN has corresponding selection assistance information of a DCN that serves the UE, wherein in determining that the accessed PLMN has the corresponding selection assistance information of the DCN that serves the UE, the UE is further configured to:
• obtain a correspondence between an identifier of a PLMN and selection assistance information of a DCN;
• and
• determine, according to the identifier of the accessed PLMN and the correspondence, that the accessed PLMN has the corresponding selection assistance information of the DCN that serves the UE;
• and
• send an access request message to the RAN node;
• and
• the RAN node is configured to receive the access request message, wherein the access request message comprises the selection assistance information of the DCN.

A non-transitory computer-readable media storing computer instructions, that when executed by one or more processors of a User Equipment (UE), cause the UE to perform steps comprising:

• obtaining an identifier of an accessed public land mobile network (PLMN);
• determining that the accessed PLMN has corresponding selection assistance information of a dedicated core network (DCN) that serves the UE;
• and
• sending an access request message to a radio access network (RAN) node, wherein the access request message comprises the selection assistance information of the DCN;
• wherein in the determining that the accessed PLMN has the corresponding selection assistance information of the DCN that serves the UE, the instructions further cause the UE to perform steps comprising:
• obtaining a correspondence between an identifier of a PLMN and selection assistance information of a DCN;
• and
• determining, according to the identifier of the accessed PLMN and the correspondence, that the accessed PLMN has the corresponding selection assistance information of the DCN that serves the UE.