Method of call routing
First Claim
1. A method of routing calls in a communications network comprising the steps of:
- at a first network node, receiving location information relating to a subscriber originating a call;
at said first network node, determining initial routing information based on said location information;
sending said location information from said first network node to a second network node;
at said second network node, determining updated routing information based on said location information;
sending said updated routing information from said second network node to said first network node; and
at said first network node, routing said call based on said updated routing information.
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Accused Products
Abstract
The invention is directed to methods and apparatus for call routing. The invention particularly relates to routing of calls, such as emergency calls, which are routed based on the location of a mobile subscriber in a cellular wireless network. The method comprises the steps of: at a first network node, receiving location information relating to a subscriber originating a call; at said first network node, determining initial routing information based on said location information; sending said location information from said first network node to a second network node; at said second network node, determining updated routing information based on said location information; sending said updated routing information from said second network node to said first network node; and at said first network node, routing said call based on said updated routing information. An advantage of the invention is that calls are routed based on more precise information, which is particularly important in the case of emergency calls.
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Citations
26 Claims
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1. A method of routing calls in a communications network comprising the steps of:
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at a first network node, receiving location information relating to a subscriber originating a call;
at said first network node, determining initial routing information based on said location information;
sending said location information from said first network node to a second network node;
at said second network node, determining updated routing information based on said location information;
sending said updated routing information from said second network node to said first network node; and
at said first network node, routing said call based on said updated routing information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of routing a call at a node in a communications network, said method comprising the steps of:
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receiving location information relating to a subscriber originating a call;
determining initial routing information based on said location information;
transmitting said location information to a second node;
requesting updated routing information from said second node;
receiving updated routing information from said second node; and
routing said call based on said updated routing information. - View Dependent Claims (16, 17)
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18. A method of updating routing information within a communications network, said method comprising the steps of:
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at a network node, receiving location information relating to a subscriber originating a call and a request for updated routing information for said call from a second network node;
determining said updated routing information based on said location information;
transmitting said updated routing information to said second network node. - View Dependent Claims (19, 20)
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21. A node in a communications network comprising:
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a receiver arranged to receive location information relating to a subscriber originating a call from a second node and a request for updated routing information for said call;
a processor arranged to determine said updated routing information based on said location information; and
a transmitter arranged to send said updated routing information to said second node. - View Dependent Claims (22, 25)
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23. A node in a communications network comprising:
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a transmitter arranged to send location information relating to a subscriber originating a call to a second node;
a processor for determining initial routing information for said call based on said location information;
a receiver arranged to receive updated routing information from said second node; and
a router arranged to route said call based on said updated routing information. - View Dependent Claims (24)
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26. A signal for sending information from a first node to a second node in a communications network, said signal comprising:
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location information for a subscriber; and
an indicator that said first node is capable of receiving updated routing information based on said location information.
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Specification