EMERGENCY CALLS FOR INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM (IMS) OVER PACKET SWITCHED CODE DIVISION MULTIPLE ACCESS (CDMA) NETWORKS
First Claim
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1. A mobile communication device-implemented method, comprising:
- receiving, by the mobile communication device, initiation of an emergency call by a user of the mobile communication device;
determining, by the mobile communication device, whether a single-carrier radio transmission technology (1xRTT) network is available for the emergency call;
routing, by the mobile communication device, the emergency call over the 1xRTT network when the 1xRTT network is available for the emergency call; and
routing, by the mobile communication device, the emergency call over an enhanced high rate packet data (eHRPD) network when the 1xRTT network is unavailable for the emergency call.
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Abstract
A mobile communication device receives initiation of an emergency call by a user of the mobile communication device, and determines whether a single-carrier radio transmission technology (1xRTT) network is available for the emergency call. The mobile communication device also routes the emergency call over the 1xRTT network when the 1xRTT network is available for the emergency call, and routes the emergency call over an enhanced high rate packet data (eHRPD) network when the 1xRTT network is unavailable for the emergency call.
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Citations
25 Claims
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1. A mobile communication device-implemented method, comprising:
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receiving, by the mobile communication device, initiation of an emergency call by a user of the mobile communication device; determining, by the mobile communication device, whether a single-carrier radio transmission technology (1xRTT) network is available for the emergency call; routing, by the mobile communication device, the emergency call over the 1xRTT network when the 1xRTT network is available for the emergency call; and routing, by the mobile communication device, the emergency call over an enhanced high rate packet data (eHRPD) network when the 1xRTT network is unavailable for the emergency call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A mobile communication device, comprising:
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a memory to store a plurality of instructions; and a processor to execute instructions in the memory to; receiving initiation of an emergency call by a user of the mobile communication device, where the mobile communication device is dual registered in the circuit switched CDMA network and the packet switched CDMA network, determine whether a circuit switched code division multiple access (CDMA) network is available for the emergency call, route the emergency call over the circuit switched CDMA network when the circuit switched CDMA network is available for the emergency call, and route the emergency call over a packet switched CDMA network when the circuit switched CDMA network is unavailable for the emergency call. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A mobile communication device comprising:
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means for receiving initiation of an emergency call by a user of the mobile communication device; means for determining whether a single-carrier radio transmission technology (1xRTT) network is available for the emergency call; means for routing the emergency call over the 1xRTT network when the 1xRTT network is available for the emergency call; means for routing the emergency call over an enhanced high rate packet data (eHRPD) network when the 1xRTT network is unavailable for the emergency call; means for determining whether the mobile communication device is dual registered in the 1xRTT network and the eHRPD network; means for determining whether the mobile communication device is registered in an Internet protocol multimedia subsystem (IMS) network; and means for using a legacy emergency call routing method to route the emergency call when the mobile communication device is not registered in the eHRPD network or the IMS network.
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Specification