Emergency calls
AssigneeBlackBerry Limited
InventorJan Hendrik Lucas Bakker
Life of this patent
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Abstract
In some examples, a device detects a calling identifier received as part of initiating a call matches an emergency identifier, the emergency identifier associated with information from which to derive a Uniform Resource Name (URN). The device detects that the device is attached to or registered a first network different from a second network, where the second network configured the emergency identifier. In response to detecting that the device is attached to or registered the first network different from the second network, the device includes a Session Initiation Protocol (SIP) Uniform Resource Identifier (URI) in a Session Initiation Protocol (SIP) INVITE message to be transmitted.
Claims20
A method of a user equipment (UE), comprising:
- receiving, at the UE, an Extended Local Emergency Number List from a first Public Land Mobile Network (PLMN);
- detecting, by the UE, an emergency number;
- deriving, by the UE, a Uniform Resource Name (URN) from the Extended Local Emergency Number List, the URN associated with the emergency number;
- detecting, at the UE, that the UE is attached to or registered with a second PLMN different from the first PLMN;
- and
- in response to the detecting that the UE is attached to or registered with the second PLMN different from the first PLMN, including, by the UE, a particular Session Initiation Protocol (SIP) Uniform Resource Identifier (URI) in a Session Initiation Protocol (SIP) INVITE message.
A user equipment (UE) comprising:
- at least one hardware processor configured to:
- receive an Extended Local Emergency Number List from a first Public Land Mobile Network (PLMN);
- detect an emergency number;
- derive a Uniform Resource Name (URN) from the Extended Local Emergency Number List, the URN associated with the emergency number;
- detect that the UE is attached to or registered with a second PLMN different from the first PLMN;
- and
- in response to the detecting that the UE is attached to or registered with the second PLMN different from the first PLMN, include a particular Session Initiation Protocol (SIP) Uniform Resource Identifier (URI) in a Session Initiation Protocol (SIP) INVITE message to be transmitted by the UE.
A non-transitory machine-readable medium comprising instructions that upon execution cause a user equipment (UE) to:
- receive an Extended Local Emergency Number List from a first Public Land Mobile Network (PLMN);
- detect an emergency number;
- derive a Uniform Resource Name (URN) from the Extended Local Emergency Number List, the URN associated with the emergency number;
- detect that the UE is attached to or registered with a second PLMN different from the first PLMN;
- and
- in response to the detecting that the UE is attached to or registered with the second PLMN different from the first PLMN, include a particular Session Initiation Protocol (SIP) Uniform Resource Identifier (URI) in a Session Initiation Protocol (SIP) INVITE message to be transmitted by the UE.
Dependencies are inferred from the claim text.