APPARATUS AND METHODS FOR TRANSMISSION OF EMERGENCY CALL DATA OVER WIRELESS NETWORKS
First Claim
1. A method of providing an emergency call within a network configured for substantially real-time packet-switched operation, the emergency call comprising a composite stream having a first stream and one or more second streams, the method comprising:
- providing the first stream in a substantially continuous manner;
providing the one or more second streams;
forming the composite stream using at least the first stream and the one or more second streams;
establishing a session, wherein the session is additionally adapted to route the composite stream; and
transmitting the composite stream via the session.
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Accused Products
Abstract
Methods and apparatus for providing useful data in association with a high-priority call such as an emergency call. In one embodiment, the data comprises a data (e.g., an MSD or FSD) embedded within one or more real-time protocol packets such as RTP Control Protocol (RTCP) packets, that are interspersed within the voice or user data stream (carried in e.g., RTP packets) of an emergency call. Apparatus and methods are described for transmitting the data portion reliably from the initiating terminal (e.g., an in-vehicle system) to a Public Safety Answering Point (PSAP), by using the same transport connection as the user data.
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Citations
47 Claims
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1. A method of providing an emergency call within a network configured for substantially real-time packet-switched operation, the emergency call comprising a composite stream having a first stream and one or more second streams, the method comprising:
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providing the first stream in a substantially continuous manner; providing the one or more second streams; forming the composite stream using at least the first stream and the one or more second streams; establishing a session, wherein the session is additionally adapted to route the composite stream; and transmitting the composite stream via the session. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13-39. -39. (canceled)
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40. A method of routing an emergency call from a source to a destination, the method comprising:
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determining if both circuit-switched and packet-switched network routes are available to route the call; when both the routes are available; (i) evaluating at least one of the routes against at least one selection criterion; (ii) selecting one of the routes based at least in part on the evaluating; and (iii) routing the call over the selected route; and when only the packet-switched route is available, routing the call over the packet switched route. - View Dependent Claims (41, 42, 43, 44)
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45. A network controller apparatus for routing emergency data over a multi-mode wireless network, the network controller comprising;
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at least two network interfaces; a processor in data communication with the at least two network interfaces; logic in data communication with the processor and the at least two network interfaces, the logic configured to; determine an availability of a packet-switched network route and a circuit-switched network route to route emergency data; when both the network routes are available; evaluate at least one of the network routes against one or more route selection criteria; select a network route based at least in part of the evaluation; and route the emergency data over the selected network route; and when only one of the network routes is available, route the emergency data over the available network route. - View Dependent Claims (46, 47)
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Specification