System, method, and device for handing off between voice over internet protocol over wireless access sessions and CDMA circuit switched voice sessions
First Claim
1. A method of handing off a communication session of an end node from a wireless access network to a CDMA network, comprising the steps of:
- requesting handoff of the communication session from the wireless access network to the CDMA network;
adding a trunk connection for a CDMA communication session;
establishing a communication link between the end node and the CDMA network for the CDMA communication session; and
moving the communication session from the wireless access network to the trunk connection.
1 Assignment
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Accused Products
Abstract
Provided are improved systems, methods, and devices for handing off VoIP sessions and CDMA voice calls between wireless access networks and CDMA networks, thereby providing a user of a mobile device the ability to roam between wireless access networks and CDMA circuit switched voice networks during ongoing communication sessions. Provided are network architectures and process frameworks that enable seamless handoff between VoIP and circuit switched CDMA voice, including messages and procedures to facilitate such handoffs. Importantly, the voice traffic is not interrupted, and the handoff process may be automatic and transparent to the users of the communication session.
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Citations
28 Claims
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1. A method of handing off a communication session of an end node from a wireless access network to a CDMA network, comprising the steps of:
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requesting handoff of the communication session from the wireless access network to the CDMA network;
adding a trunk connection for a CDMA communication session;
establishing a communication link between the end node and the CDMA network for the CDMA communication session; and
moving the communication session from the wireless access network to the trunk connection. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of handing off a communication session of an end node from a CDMA network to a wireless access network, comprising the steps of:
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requesting handoff of the communication session from the CDMA network to the wireless access network;
establishing a communication link with the wireless access network for a wireless access network communication session;
establishing a communication link between the end node and the wireless access network for the wireless access network communication session; and
moving the communication session from the CDMA network to the wireless access network communication link. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system capable of handing off a communication session of an end node between a wireless access network and a CDMA network, comprising:
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a wireless end node;
at least one node of the wireless access network communicably coupled to said wireless end node; and
at least one node of the CDMA network communicably coupled to said wireless end node, wherein each of said wireless end node and said nodes of said respective networks comprise a session handoff module for handing off the communication session of the wireless end node between the wireless access network and the CDMA network. - View Dependent Claims (15, 16, 17)
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18. A mobile station, comprising:
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a controller;
a wireless communication interface communicably coupled to said controller and capable of communicating in a wireless access network and a CDMA network;
a system selection module communicably coupled to said controller and capable of determining whether the mobile station should operate in the wireless access network or the CDMA network; and
a session handoff module communicably coupled to said controller and capable of managing handoff of a communication session between the wireless access network and the CDMA network, wherein said controller is capable of operating said session handoff module and said system selection module for performing handoff a communication session between the wireless access network and the CDMA network. - View Dependent Claims (19, 20, 21)
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22. A server, comprising:
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a controller for communicating with at least one communication interface of a wireless access network and a communication interface of a CDMA network; and
a session handoff module communicably coupled to said controller and capable of managing handoff of a communication session between the wireless access network and the CDMA network, wherein said controller is capable of operating said session handoff module for performing handoff of the communication session between the wireless access network and the CDMA network. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification