Access control methods and apparatus for radio systems
View Patent ↗A wireless terminal initiates an inter-system change procedure to switch from a first core network to second when an access attempt to the first core network is barred. The processor circuitry configured to: register to a first core network; receive first access control information and second access control information from radio access node; upon an access attempt, determine if the access attempt is allowed for the first core network based on the first access control information; when the access attempt is barred for the first core network, determine if the access attempt is permitted by a second core network allows based on the second access control information; and, when the access attempt is allowed for the second core network, initiate an inter-system change procedure to designate the second core network as a registered network.
1. A wireless terminal that communicates across a radio interface with at least one radio access node and to one or more management entities of core networks via the radio access node, the wireless terminal comprising:
receiver circuitry configured to receive, from the at least one radio access node, first access control information and separately to receive, from the at least one radio access node, second access control information;
the first access control information comprising one or more access categories and access barring status for each of the access categories,
the second access control information comprising one or more access categories and access barring status for each of the access categories,
processor circuitry configured to:
register to a first core network;
upon initiating an access attempt associated with an access category, determine whether or not the access attempt is allowed for the first core network based on the access barring status of the access category included in the first access control information;
in a case that the access attempt is barred for the first core network, determine whether or not the access attempt is allowed by a second core network based on the access barring status of the access category included in the second access control information, and;
in a case that the access attempt is allowed for the second core network, perform an inter-system change procedure to designate the second core network as a registered network by sending a non-access stratum (NAS) layer message to a management entity of the second core network.
2. The wireless terminal of claim 1 , wherein the NAS layer message is an Attach message.
3. The wireless terminal of claim 1 , wherein the NAS layer message is a Registration message.
4. The wireless terminal of claim 1 , wherein the wireless terminal is configured to maintain a registration status for the first core network as the registered network when the access attempt for the second core network is also barred.
5. The wireless terminal of claim 1 , wherein the first core network is an Evolved Packet Core (EPC) network and the second core network is a 5 th Generation Core network (5GCN).
6. The wireless terminal of claim 1 , wherein the first core network is a 5 th Generation Core network (5GCN) and the second core network is an Evolved Packet Core (EPC) network.
7. A method in a wireless terminal that communicates across a radio interface with at least one radio access node and to one or more management entities of core networks via the radio access node, the method comprising:
registering to a first core network;
receiving first access control information and second access control information from the at least one radio access node;
the first access control information comprising one or more access categories and access barring status for each of the access categories,
the second access control information comprising one or more access categories and access barring status for each of the access categories,
upon initiating an access attempt associated with an access category, determining whether or not the access attempt is allowed for the first core network based on the access barring status of the access category included in the first access control information;
in a case that the access attempt is barred for the first core network, determining whether or not the access attempt is allowed by a second core network based on the access barring status of the access category included in the second access control information;
in a case that the access attempt is allowed for the second core network, performing an inter-system change procedure to designate the second core network as a registered network by sending a non-access stratum (NAS) layer message to a management entity of the second core network.
8. The method of claim 7 , wherein the NAS layer message is an Attach message.
9. The method of claim 7 , wherein the NAS layer message is a Registration message.
10. The method of claim 7 , wherein comprising maintaining the registration status for the first core network when the access attempt for the second core network is also barred.
11. The method of claim 7 , wherein the first core network is an Evolved Packet Core (EPC) network and the second core network is a 5 th Generation Core network (5GCN).
12. The method of claim 7 , wherein the first core network is a 5 th Generation Core network (5GCN) and the second core network is an Evolved Packet Core (EPC) network.