Telecommunications system
AssigneeTelefonaktiebolaget LM Ericsson
InventorsHans Ake Lindgren, Mats Ola Stille
Life of this patent
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Abstract
There is described a system which, in a voice over IP radiotelecommunications system, allows a mobile station to make an emergency call, even though other calls would not be allowed at that time. The mobile station includes an emergency call indication in the session activation request, and this is recognized by the network nodes, which then allow call set up.
Claims14
A mobile communications device, capable of operating in a packet data communications network, the device comprising:
- means for analysing a dialled number,
- the device being adapted, in the event that a dialled number is indicative of an emergency call, to send a session activation request which includes an emergency call indication.
A method of handling an emergency call in a mobile device capable of operating in a packet data communication network, the method comprising:
- analysing a dialled number;
- and
- if the dialled number is indicative of an emergency call, sending a session activation request which includes an emergency call indication.
A network node for use in a pocket data communications network, the node comprising means for detecting an emergency call indication in a received session activation request, and being adapted, in the event that an emergency call indication is detected, to set up a call even if normal call setup criteria are not met.
A method of operation of a node in a packet data communications network, the method comprising:
- detecting an emergency call indication in a received session activation request, and
- if an emergency call indication is detected, setting up a call even if normal call setup criteria are not met.
Dependencies are inferred from the claim text.