Abstract
A method and apparatus for controlling inter-PLMN handover based on CSG lists of equivalent PLMNs is provided. A method for receiving subscriber information of a terminal at a Mobility Management Entity (MME) includes transmitting an update location request message for the terminal to a Home Subscriber Server (HSS), and receiving an update location acknowledgement message with the subscriber information of the terminal from the HSS, wherein the update location request message comprises a list of equivalent Public Land Mobile Networks (PLMNs) among which the MME supports inter-PLMN handover of the terminal. The method and apparatus for controlling inter-plan handover to a CSG cell according to the present invention is characterized in that a control apparatus of a core network acquires the allowed CSG lists for determining a User Equipments (UEs) capability of access to a CSG cell and determines whether to permit inter-PLMN handover based on the allowed CSG lists.
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Technologies
Product
Use Cases
Services
Claim
1. A method performed by a mobility management entity (MME) in a communication system, the method comprising:
receiving, from a terminal, an attach request message or a tracking area update request message;
transmitting, to a home subscriber server (HSS), an update location request message, the update location request message including an equivalent public land mobile network (PLMN) list in case that the MME supports an inter-PLMN handover to a closed subscriber group (CSG) cell;
receiving, from the HSS, an update location acknowledgement (ACK) message including CSG subscription information for the equivalent PLMN list;
receiving, from a base station, a handover required message including a CSG identity (ID) of a target cell; and
validating a CSG membership of the terminal in the target cell based on a CSG ID list of a target PLMN.
2. The method of claim 1, wherein a handover to the target cell is rejected in case that the handover to the target cell is not permitted based on the CSG ID list of the target PLMN.
3. The method of claim 1,
wherein the CSG subscription information for the equivalent PLMN list includes at least one CSG ID associated with the equivalent PLMN list, and
wherein the equivalent PLMN list is a list of PLMNs considered as equivalent for handover.
4. The method of claim 1, wherein the update location ACK message further includes CSG subscription information for a registered PLMN.
5. A method performed by a terminal in a communication system, the method comprising:
transmitting, to a mobility management entity (MME), an attach request message or a tracking area update request message; and
receiving, from a base station, a message related to a handover,
wherein an update location request message is transmitted from the MME to a home subscriber server (HSS),
wherein the update location request message includes an equivalent public land mobile network (PLMN) list in case that the MME supports an inter-PLMN handover to a closed subscriber group (CSG),
wherein an update location acknowledgement (ACK) message is transmitted from the HSS to the MME, the update location ACK message including CSG subscription information for the equivalent PLMN list,
wherein a handover required message associated with the handover is transmitted from the base station to the MME, the handover required message including a CSG identity (ID) of a target cell, and
wherein a CSG membership of the terminal in the target cell is validated based on a CSG ID list of a target PLMN.
6. The method of claim 5, wherein the handover to the target cell is rejected in case that the handover to the target cell is not permitted based on the CSG ID list of the target PLMN.
7. The method of claim 5,
wherein the CSG subscription information for the equivalent PLMN list includes at least one CSG ID associated with the equivalent PLMN list,
wherein the equivalent PLMN list is a list of PLMNs considered as equivalent for handover, and
wherein the update location ACK message further includes CSG subscription information for a registered PLMN.
8. A method performed by a base station in a communication system, the method comprising:
transmitting, to a mobility management entity (MME), an attach request message or a tracking area update request message associated with a terminal; and
transmitting, to the MME, a handover required message including a closed subscriber group (CSG) identity (ID) of a target cell,
wherein an update location request message is transmitted from the MME to a home subscriber server (HSS),
wherein the update location request message includes an equivalent public land mobile network (PLMN) list in case that the MME supports an inter-PLMN handover to a CSG cell,
wherein an update location acknowledgement (ACK) message is transmitted from the HSS to the MME, the update location ACK message including CSG subscription information for the equivalent PLMN list, and
wherein a CSG membership of the terminal in the target cell is validated based on a CSG ID list of a target PLMN.
9. The method of claim 8, wherein a handover to the target cell is rejected in case that the handover to the target cell is not permitted based on the CSG ID list of a target PLMN.
10. The method of claim 8, wherein the CSG subscription information for the equivalent PLMN list includes at least one CSG ID associated with the equivalent PLMN list,
wherein the equivalent PLMN list is a list of PLMNs considered as equivalent for handover, and
wherein the update location ACK message further includes CSG subscription information for a registered PLMN.
11. A mobility management entity (MME) in a communication system, the MME comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a terminal, an attach request message or a tracking area update request message,
transmit, to a home subscriber server (HSS), an update location request message, the update location request message including an equivalent public land mobile network (PLMN) list in case that the MME supports an inter-PLMN handover to a closed subscriber group (CSG) cell,
receive, from the HSS, an update location acknowledgement (ACK) message including CSG subscription information for the equivalent PLMN list,
receive, from a base station, a handover required message including a CSG identity (ID) of a target cell, and
validate a CSG membership of the terminal in the target cell based on a CSG ID list of a target PLMN.
12. The MME of claim 11, wherein a handover to the target cell is rejected in case that the handover to the target cell is not permitted based on the CSG ID list of the target PLMN.
13. The MME of claim 11,
wherein the CSG subscription information for the equivalent PLMN list includes at least one CSG ID associated with the equivalent PLMN list, and
wherein the equivalent PLMN list is a list of PLMNs considered as equivalent for handover.
14. The MME of claim 11, wherein the update location ACK message further includes CSG subscription information for a registered PLMN.
15. A terminal in a communication system, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a mobility management entity (MME), an attach request message or a tracking area update request message, and
receive, from a base station, a message related to a handover,
wherein an update location request message is transmitted from the MME to a home subscriber server (HSS),
wherein the update location request message includes an equivalent public land mobile network (PLMN) list in case that the MME supports an inter-PLMN handover to a closed subscriber group (CSG) cell,
wherein an update location acknowledgement (ACK) message is transmitted from the HSS to the MME, the update location ACK message including CSG subscription information for the equivalent PLMN list,
wherein a handover required message associated with the handover is transmitted from the base station to the MME, the handover required message including a CSG identity (ID) of a target cell, and
wherein a CSG membership of the terminal in the target cell is validated based on a CSG ID list of a target PLMN.
16. The terminal of claim 15, wherein the handover to the target cell is rejected in case that the handover to the target cell is not permitted based on the CSG ID list of the target PLMN.
17. The terminal of claim 15,
wherein the CSG subscription information for the equivalent PLMN list includes at least one CSG ID associated with the equivalent PLMN list,
wherein the equivalent PLMN list is a list of PLMNs considered as equivalent for handover, and
wherein the update location ACK message further includes CSG subscription information for a registered PLMN.
18. A base station in a communication system, the base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a mobility management entity (MME), an attach request message or a tracking area update request message associated with a terminal, and
transmit, to the MME, a handover required message including a closed subscriber group (CSG) identity (ID) of a target cell,
wherein an update location request message is transmitted from the MME to a home subscriber server (HSS),
wherein the update location request message includes an equivalent public land mobile network (PLMN) list in case that the MME supports an inter-PLMN handover to a CSG cell,
wherein an update location acknowledgement (ACK) message is transmitted from the HSS to the MME, the update location ACK message including CSG subscription information for the equivalent PLMN list, and
wherein a CSG membership of the terminal in the target cell is validated based on a CSG ID list of a target PLMN.
19. The base station of claim 18, wherein a handover to the target cell is rejected in case that the handover to the target cell is not permitted based on the CSG ID list of a target PLMN.
20. The base station of claim 18, wherein the CSG subscription information for the equivalent PLMN list includes at least one CSG ID associated with the equivalent PLMN list,
wherein the equivalent PLMN list is a list of PLMNs considered as equivalent for handover, and
wherein the update location ACK message further includes CSG subscription information for a registered PLMN.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.