Method for setting up an emergency call in a computer local area network, terminal and server for implementing the method
First Claim
Patent Images
1. A method for setting up an emergency call in a computer local area network, the method comprising:
- defining a first virtual network including at least one emergency call server coupled with the computer local area network, the first virtual network including no terminals participating in or requesting setup of non-emergency calls and the first virtual network having a priority higher than that of any virtual network to which a second terminal requesting the setting up of a non-emergency call is assigned;
if a first terminal requests the setting up of an emergency call;
assigning the first terminal to the first virtual network, androuting at least one message from the first terminal to an emergency call center via the first virtual network; and
assigning the first terminal to a second virtual network having a priority higher than that of any virtual network to which the second terminal is assigned, and routing at least one message from the emergency call center to the first terminal via the second virtual network, wherein the first virtual network is different from the second virtual network;
wherein the first terminal is operative to send packets of data carrying an identifier of the first virtual network and a broadcast mode indicator, and to receive packets of data carrying an identifier of the second virtual network and a unicast mode indicator.
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Abstract
If a given terminal (IPP1) requests the setting up of an emergency call, the method consists in:
- assigning that terminal to a first virtual network (VLAN1) having a priority higher than that of any virtual network to which a terminal requesting the setting up of a non-urgent call is assigned, the given terminal then using the first virtual network to send in broadcast mode a message addressed in particular to an emergency call server (EMSR);
- assigning this terminal to a second virtual network (VLAN2) having a priority higher than that of any virtual network to which a terminal that is requesting the setting up of a non-urgent call is assigned, the emergency call server (EMSR) then using the second virtual network to respond to the given terminal in unicast mode.
56 Citations
14 Claims
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1. A method for setting up an emergency call in a computer local area network, the method comprising:
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defining a first virtual network including at least one emergency call server coupled with the computer local area network, the first virtual network including no terminals participating in or requesting setup of non-emergency calls and the first virtual network having a priority higher than that of any virtual network to which a second terminal requesting the setting up of a non-emergency call is assigned; if a first terminal requests the setting up of an emergency call; assigning the first terminal to the first virtual network, and routing at least one message from the first terminal to an emergency call center via the first virtual network; and assigning the first terminal to a second virtual network having a priority higher than that of any virtual network to which the second terminal is assigned, and routing at least one message from the emergency call center to the first terminal via the second virtual network, wherein the first virtual network is different from the second virtual network; wherein the first terminal is operative to send packets of data carrying an identifier of the first virtual network and a broadcast mode indicator, and to receive packets of data carrying an identifier of the second virtual network and a unicast mode indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An Internet type telephone terminal comprising:
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a data terminal assigning the internet type telephone terminal to a first virtual network and to a second virtual network if the internet type telephone terminal requests the setting up of an emergency call, where the first and second virtual networks each have a priority higher than that of any virtual network to which is assigned a second terminal that is requesting the setting up of a non-emergency call, the first virtual network including at least one emergency call server coupled with a computer local area network and the first virtual network including no terminals participating in or requesting setup of non-emergency calls; wherein the Internet type telephone terminal is operative to send packets of data carrying an identifier of the first virtual network and a broadcast mode indicator, and to receive packets of data carrying an identifier of the second virtual network and a unicast mode indicator. - View Dependent Claims (12)
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13. A gateway, comprising:
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a first connection for connecting to an analog telephone terminal or a digital synchronous telephone terminal; a second connection for connecting to an Internet type local area network providing a telephony service; and at least one processor operatively coupled with the first connection and the second connection to; when a telephone terminal sends a message requesting setting up of an emergency call; recognize that the message is requesting the setting up of an emergency call, and forward the message in broadcast mode in the local area network, adding to the message a virtual network identifier corresponding to a first virtual network and a broadcast mode indicator, the first virtual network including at least one emergency call server coupled with the Internet type local area network, and the first virtual network including no terminals participating in or requesting setup of non-emergency calls and the first virtual network having a priority higher than that of any virtual network to which is assigned a terminal that is requesting the setting up of a non-emergency call; add to any message coming from the terminal a virtual network identifier corresponding to the first virtual network during the duration of the emergency call; and forward to the terminal any message carrying an address corresponding to the terminal and carrying a virtual network identifier corresponding to a second virtual network and a unicast mode indicator, the second virtual network having a priority higher than that of any virtual network to which is assigned a terminal that is requesting the setting up of a non-emergency call. - View Dependent Claims (14)
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Specification