Mobile communication handoff between heterogeneous networks
First Claim
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1. A method for providing telecommunication service, comprising:
- transmitting a node identifier to a mobile station over a first network, wherein the first network supports a first communication protocol;
receiving, at a device comprising a handoff server identified by the node identifier, a handoff call from the mobile station over a second network that supports a second communication protocol, wherein the handoff call includes a mobile station identifier; and
in response to receiving the handoff call;
identifying, based on the mobile station identifier, a first communication link over the first network;
establishing, by the device, an alternative link through the handoff server to redirect a plurality of packets from the first communication link to the alternative link, the packets redirected from communication between a foreign agent of the first network and a home agent to the alternative link;
initiating, over the second network, a second communication link with the mobile station;
extracting routing information from media redirected from the first communication link identified by the mobile station identifier received over the second network;
encapsulating media received over the second communication link by replacing one or more header fields of the media with the routing information extracted from media redirected from the first communication link; and
transmitting the media received over the second communication link to a remote element identified by the extracted routing information.
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Abstract
A method for providing telecommunication service includes transmitting a node identifier to a mobile station over a first network that supports a first communication protocol and receiving a handoff call, based on the node identifier, from the mobile station over a second network that supports a second communication protocol. The handoff call includes a mobile station identifier. The method further includes identifying a first communication link over the first network based on the mobile station identifier and initiating a second communication link with the mobile station over the second network. The method also includes terminating the first communication link.
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Citations
37 Claims
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1. A method for providing telecommunication service, comprising:
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transmitting a node identifier to a mobile station over a first network, wherein the first network supports a first communication protocol; receiving, at a device comprising a handoff server identified by the node identifier, a handoff call from the mobile station over a second network that supports a second communication protocol, wherein the handoff call includes a mobile station identifier; and in response to receiving the handoff call; identifying, based on the mobile station identifier, a first communication link over the first network; establishing, by the device, an alternative link through the handoff server to redirect a plurality of packets from the first communication link to the alternative link, the packets redirected from communication between a foreign agent of the first network and a home agent to the alternative link; initiating, over the second network, a second communication link with the mobile station; extracting routing information from media redirected from the first communication link identified by the mobile station identifier received over the second network; encapsulating media received over the second communication link by replacing one or more header fields of the media with the routing information extracted from media redirected from the first communication link; and transmitting the media received over the second communication link to a remote element identified by the extracted routing information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for providing telecommunication service, comprising:
a handoff server operable to; transmit a node identifier identifying the handoff server to a mobile station over a first network operable to support communication according to a first communication protocol; receive a handoff call from the mobile station over a second network operable to support communication according to a second communication protocol, wherein the handoff call includes a mobile station identifier; and in response to receiving the handoff call; identify, based on the mobile station identifier, a first communication link over the first network; establish an alternative link through the handoff server to redirect a plurality of packets from the first communication link to the alternative link, the packets redirected from communication between a foreign agent of the first network and a home agent to the alternative link; initiate, over the second network, a second communication link with the mobile station; extract routing information from media redirected from the first communication link identified by the mobile station identifier received over the second network; encapsulate media received over the second communication link by replacing one or more header fields of the media with the routing information extracted from media redirected from the first communication link; and transmit the media received from the mobile station on the second communication link to a remote element identified by the extracted routing information. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable medium comprising logic for providing telecommunication service, the logic operable when executed to perform the steps of:
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transmitting a node identifier to a mobile station over a first network, wherein the first network supports a first communication protocol; receiving, at a device identified by the node identifier, a handoff call from the mobile station over a second network that supports a second communication protocol, wherein the handoff call includes a mobile station identifier; and in response to receiving the handoff call;
identifying the first communication link based on the mobile station identifier;establishing an alternative link through a handoff server to redirect a plurality of packets from the first communication link to the alternative link, the packets redirected from communication between a foreign agent of the first network and a home agent to the alternative link; initiating, over the second network, a second communication link with the mobile station; extracting routing information from media redirected from the first communication link identified by the mobile station identifier received over the second network; encapsulating media received over the second communication link by replacing one or more header fields of the media with the routing information extracted from media redirected from the first communication link; and transmitting the media received over the second communication link to a remote element identified by the extracted routing information. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for providing telecommunication service, comprising:
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an interface operable to support communication on a first network according to a first communication protocol and to support communication on a second network according to a second communication protocol; and a processor operable to; transmit a node identifier identifying the apparatus to a mobile station over a first network, wherein the first network supports a first communication protocol; receive a handoff call from the mobile station over a second network that supports a second communication protocol, wherein the handoff call includes a mobile station identifier; and in response to receiving the handoff call; identify, based on the mobile station identifier, a first communication link over the first network; establish an alternative link through a handoff server to redirect a plurality of packets from the first communication link to the alternative link, the packets redirected from communication between a foreign agent of the first network and a home agent to the alternative link; initiate a second communication link between the mobile station and the handoff server on the second network; extract routing information from media redirected from the first communication link identified by the mobile station identifier received over the second network; encapsulate media received over the second communication link by replacing one or more header fields of the media with the routing information extracted from media redirected from the first communication link; and transmit the media received from the mobile station on the second communication link to a remote element identified by the extracted routing information. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A system for providing telecommunication service, comprising:
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means for establishing a first communication link for a communication session between a mobile station and a remote element, the first communication link established over a first network that supports a first communication protocol; means for transmitting a node identifier to a mobile station over the first communication link; means for receiving a handoff call, at a device identified by the node identifier, from the mobile station over a second network that supports a second communication protocol, wherein the handoff call includes a mobile station identifier; means for identifying the first communication link based on the mobile station identifier in response to receiving the handoff call; means for establishing an alternative link through a handoff server to redirect a plurality of packets from the first communication link to the alternative link, the packets redirected from communication between a foreign agent of the first network and a home agent to the alternative link; means for initiating, over the second network, a second communication link with the mobile station in response to receiving the handoff call; means for extracting routing information from media redirected from the first communication link identified by the mobile station identifier received over the second network; means for encapsulating media received over the second communication link by replacing one or more header fields of the media with the routing information extracted from media redirected from the first communication link; and means for transmitting the media received over the second communication link to the remote element identified by the extracted routing information.
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Specification