Transitioning of a packet-switched emergency call between first and second types of wireless access networks
First Claim
Patent Images
1. A method comprising:
- pre-registering, by one or more processors, a mobile station with a second type wireless access network when the mobile station is initially attached to a first type wireless access network;
storing information relating to a predefined emergency call session to be used with the second type wireless access network;
detecting, by one or more processors, that the mobile station is involved in a packet-switched emergency call while the mobile station is attached to the first type of wireless access network;
detecting, by the one or more processors, transitioning of the mobile station from the first type wireless access network to the second type wireless access network; and
in response to detecting transitioning of the mobile station, the one or more processors sending a message indicating transitioning of the mobile station from the first type wireless access network to the second type wireless access network to cause the packet-switched emergency call to be performed over the second type wireless access network using the information of the predefined emergency call session to avoid negotiating a context of a packet-switched emergency call with the second type wireless access network after the transitioning, the first type wireless access network being an Evolved Universal Terrestrial Radio Access (EUTRA) network and the second type wireless access network being a High Rate Packet Data (HRPD) access network.
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Abstract
A mobile station that is initially attached to a first type of wireless access network is involved in a packet-switched emergency call. Upon detection of transitioning of the mobile station, a message is sent indicating transitioning of the mobile station from the first type wireless access network to the second type wireless access network to cause the packet-switched emergency call to be performed over the second type wireless access network.
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Citations
25 Claims
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1. A method comprising:
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pre-registering, by one or more processors, a mobile station with a second type wireless access network when the mobile station is initially attached to a first type wireless access network; storing information relating to a predefined emergency call session to be used with the second type wireless access network; detecting, by one or more processors, that the mobile station is involved in a packet-switched emergency call while the mobile station is attached to the first type of wireless access network; detecting, by the one or more processors, transitioning of the mobile station from the first type wireless access network to the second type wireless access network; and in response to detecting transitioning of the mobile station, the one or more processors sending a message indicating transitioning of the mobile station from the first type wireless access network to the second type wireless access network to cause the packet-switched emergency call to be performed over the second type wireless access network using the information of the predefined emergency call session to avoid negotiating a context of a packet-switched emergency call with the second type wireless access network after the transitioning, the first type wireless access network being an Evolved Universal Terrestrial Radio Access (EUTRA) network and the second type wireless access network being a High Rate Packet Data (HRPD) access network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A communications node comprising:
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one or more processors; a communication interface; and a storage media, coupled to the one or more processors, comprising instructions executable by the one or more processors to configure the communication node to; pre-register a mobile station with a target wireless access network when the mobile station is initially attached to a source wireless access network; store information regarding a predefined emergency call session to be used with the target wireless access network; responsive to the source wireless access network deciding to transition the mobile station, communicate messaging via the communication interface to allow transitioning of the mobile station from the source wireless access network to the target wireless access network; and use the stored information regarding the predefined emergency call session to establish the packet-switched emergency call over the target wireless access network without negotiating a context of the packet-switched emergency call with the target wireless access network, the source wireless access network being an Evolved Universal Terrestrial Radio Access (EUTRA) network and the target wireless access network being a High Rate Packet Data (HRPD) access network. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. One or more computer-readable storage memories storing instructions-executable by one or more processors to:
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pre-register a session with a second type wireless access network while a mobile station is attached to a first type wireless access network; store information relating to a predefined emergency call session to be used with the second type wireless access network; detect that the mobile station is involved in a packet-switched emergency call while the mobile station is attached to the first type of wireless access network; detect transitioning of the mobile station from the first type wireless access network to the second type wireless access network; and in response to detecting transitioning of the mobile station, send a message indicating transitioning of the mobile station from the first type wireless access network to the second type wireless access network to cause the packet-switched emergency call to be performed over the second type wireless access network using the stored information relating to the predefined emergency call session to avoid negotiating a context of the packet-switched emergency call with the second type wireless access network, the first type wireless access network being an Evolved Universal Terrestrial Radio Access (EUTRA) network and the second type wireless access network being a High Rate Packet Data (HRPD) access network. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification