Reselection between regular and dedicated core networks
Certain aspects of the present disclosure relate to techniques selecting a core network. As described herein, a user equipment (UE) may receive an indication of services provided by a first core network (CN). The UE may take action to reselect from the first CN to a second CN to access a set of services not provided by the first core network. When a UE desires services not available on a currently-connected CN, the UE may transmit an establishment request message requesting the services desired.
1. A method for wireless communication by a machine-type communication (MTC) user equipment (UE), comprising:
receiving an attach accept message from a first core network, wherein the attach accept message indicates that the first core network supports a first set of services including small data over control plane transmissions and does not support data bearer services;
determining the MTC UE desires to begin mobile originated (MO) bearer supported communication; and
taking action to reselect from the first core network to a second core network to access support for data bearer services,
wherein taking the action comprises initiating a registration update, wherein the registration update does not indicate an identifier associated with the first core network and includes at least one of: an indication to connect to a core network control node, an indication to connect to a core network that supports data bearer services, an indication not to connect to the first core network, or a combination thereof.
2. The method of claim 1 , wherein the registration update indicates, to a Radio Access Network (RAN) node, a service requested by the UE that is not provided by the first core network.
3. The method of claim 1 , wherein the identifier associated with the first core network comprises a Globally Unique MME Identifier (GUMMEI).
4. The method of claim 1 , wherein the identifier associated with the first core network comprises a temporary identifier.
5. The method of claim 4 , wherein taking the action further comprises initiating a tracking area update (TAU) request transmitting an indication,
to a radio access network (RAN) node, of a permanent identifier associated with the UE.
6. The method of claim 5 , wherein the TAU request transmits information regarding the first core network.
7. The method of claim 1 , wherein the first core network combines a control plane and a user plane.
8. An apparatus for wireless communication by a machine-type communication (MTC) user equipment (UE), comprising:
means for receiving an attach accept message from a first core network, wherein the attach accept message indicates that the first core network supports a first set of services including small data over control plane transmissions and does not support data bearer services;
means for determining the MTC UE desires to begin mobile originated (MO) bearer supported communication; and
means for taking action to reselect from the first core network to a second core network to access support for data bearer services,
wherein the means for taking the action comprises means for initiating a registration update, wherein the registration update does not indicate an identifier associated with the first core network and includes at least one of: an indication to connect to a core network control node, an indication to connect to a core network that supports data bearer services, an indication not to connect to the first core network, or a combination thereof.
9. The apparatus of claim 8 , wherein the registration update indicates, to a Radio Access Network (RAN) node, a service requested by the UE that is not provided by the first core network.
10. The apparatus of claim 8 , wherein the identifier associated with the first core network comprises a Globally Unique MME Identifier (GUMMEI).
11. The apparatus of claim 8 , wherein the identifier associated with the first core network comprises a temporary identifier.
12. The apparatus of claim 11 , wherein the means for taking the action further comprises means for initiating a tracking area update (TAU) request transmitting an indication, to the radio access network (RAN) node, of a permanent identifier associated with the UE.
13. The apparatus of claim 12 , wherein the TAU request transmits information regarding the first core network.
14. The apparatus of claim 8 , wherein the first core network combines a control plane and a user plane.
15. An apparatus for wireless communication by a machine-type communication (MTC) user equipment (UE), comprising:
a receiver configured to receive an attach accept message from a first core network, wherein the attach accept message indicates that the first core network supports a first set of services including small data over control plane transmissions and does not support data bearer services; and
at least one processor configured to:
determine the MTC UE desires to begin mobile originated (MO) bearer supported communication; and
take action to reselect from the first core network to a second core network to access support for data bearer services, wherein the at least one processor is configured to take the action by initiating a registration update, wherein the registration update does not indicate an identifier associated with the first core network and includes at least one of an indication to connect to a core network control node, an indication to connect to a core network that supports data bearer services, an indication not to connect to the first core network, or a combination thereof; and a memory coupled to the at least one processor.
16. The apparatus of claim 15 , wherein the registration update indicates, to a Radio Access Network (RAN) node, a service requested by the UE that is not provided by the first core network.
17. The apparatus of claim 15 , wherein the identifier associated with the first core network comprises a Globally Unique MME Identifier (GUMMEI).
18. The apparatus of claim 15 , wherein the identifier associated with the first core network comprises a temporary identifier.
19. The apparatus of claim 18 , wherein the at least one processor is further configured to take the action by initiating a tracking area udate (TAU) request transmitting an indication, to a radio access network (RAN) node, of a permanent identifier associated with the UE.
20. The apparatus of claim 19 , wherein the TAU request transmits information regarding the first core network.
21. The apparatus of claim 15 , wherein the first core network combines a control plane and a user plane.
22. A non-transitory computer readable medium having instructions stored thereon, the instructions executable by one or more processors for causing a machine-type communication (MTC) user equipment (UE) to:
receive an attach accept message from a first core network, wherein the attach accept message indicates that the first core network supports a first set of services including small data over control plane transmissions and does not support data bearer services;
determine the MTC UE desires to begin mobile originated (MO) bearer supported communication; and
take action to reselect from the first core network to a second core network to access support for data beater services,
wherein the at least one processor is configured to take action by initiating a registration update, wherein the registration update does not indicate an identifier associated with the first core network and includes at least one of an indication to connect to a core network control node, an indication to connect to a core network that supports data bearer services, or an indication not to connect to the first core network, or a combination thereof.
23. The computer readable medium of claim 22 , wherein the registration update indicates, to a Radio Access Network (RAN) node, a service requested by the UE that is not provided by the first core network.