PLMN Selection for Mission Critical Devices
AssigneeBlackBerry Limited
InventorsNicholas James Russell, Adrian Buckley, Jan Hendrik Lucas Bakker
Life of this patent
Estimating the term…
Abstract
A method for selecting a Public Land Mobile Network (PLMN) at a user equipment (UE), comprising receiving, from a network entity, a list of PLMN identifiers, attempting to register the UE with a network using at least one PLMN identifier from the list of PLMN identifiers, and if the attempt to register with the network is successful, performing a Session Initiation Protocol (SIP) registration to an Internet Protocol (IP) Multimedia Sub-system (IMS) associated to the PLMN identifier.
Claims23
A method for selecting a Public Land Mobile Network (PLMN) at a user equipment (UE), the method comprising:
- determining that a first trigger condition has been met;
- transmitting to a network entity a message, the message comprising at least one of an indication that the first trigger condition has been met or location information for the UE;
- receiving, from the network entity, a list of PLMN identifiers;
- attempting to register the UE with a network using at least one PLMN identifier from the list of PLMN identifiers;
- and
- if the attempt to register with the network is successful, performing a Session Initiation Protocol (SIP) registration to an Internet Protocol (IP) Multimedia Sub-system (IMS) associated to the PLMN identifier.
(canceled)
A user equipment (UE) comprising:
- a processor;
- and
- a communications subsystem;
- wherein the processor and the communications subsystem cooperate to:
- determine that a first trigger condition has been met;
- transmit to a network entity a message, the message comprising at least one of an indication that the first trigger condition has been met or location information for the UE;
- receive, from the network entity, a list of PLMN identifiers;
- attempt to register the UE with a network using at least one PLMN identifier from the list of PLMN identifiers;
- and
- if the attempt to register with the network is successful, performing a Session Initiation Protocol (SIP) registration to an Internet Protocol (IP) Multimedia Sub-system (IMS) associated to the PLMN identifier.
(canceled)
A method at a network element comprising:
- receiving, from a User Equipment (UE), a message comprising at least one of an indication that the UE wishes to migrate to a partner MC system and a location of the UE;
- determining a list of Public Land Mobile Network (PLMN) identifiers, wherein each PLMN identifier identifies a PLMN associated to the partner MC system;
- transmitting the list of PLMN identifiers to the UE.
Dependencies are inferred from the claim text.