System and method for handling media in a seamless handoff environment
First Claim
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1. A method for handling media in a make-before-break handoff between wireless networks, comprising:
- communicating with a mobile station to facilitate a session handoff between two call legs of a session;
identifying a relevant frame of one of the legs;
performing a cross-correlation operation;
generating a delay difference estimate between the two legs; and
performing a level difference estimation for the two legs, wherein the cross-correlation operation includes a vector dot-product operation, wherein the level difference estimation operation includes;
determining an energy level in each frame;
scaling selected frames relative to each other; and
comparing two frames in order to resolve the two frames relative to each other, and wherein the two frames may be amplified or attenuated such that an end user associated with the session hears a similar level of signal.
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Abstract
A method for handling media in a make-before-break handoff between wireless networks is provided that includes communicating with a mobile station to facilitate a session handoff between two call legs of a session. The method also includes identifying a relevant frame of one of the legs, performing a cross correlation operation, generating a delay difference estimate between the two legs, and performing a level difference estimation for the two legs.
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Citations
19 Claims
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1. A method for handling media in a make-before-break handoff between wireless networks, comprising:
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communicating with a mobile station to facilitate a session handoff between two call legs of a session; identifying a relevant frame of one of the legs; performing a cross-correlation operation; generating a delay difference estimate between the two legs; and performing a level difference estimation for the two legs, wherein the cross-correlation operation includes a vector dot-product operation, wherein the level difference estimation operation includes; determining an energy level in each frame; scaling selected frames relative to each other; and comparing two frames in order to resolve the two frames relative to each other, and wherein the two frames may be amplified or attenuated such that an end user associated with the session hears a similar level of signal. - View Dependent Claims (2, 3, 4, 5)
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6. A system for handling media in a make-before-break handoff between wireless networks, comprising:
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a mobility application operable to communicate with a mobile station to facilitate a session handoff between two call legs of a session, wherein during the session handoff the mobility application is operable to; identify a relevant frame of one of the legs; perform a cross-correlation operation; generate a delay difference estimate; and perform a level difference estimation, wherein the cross-correlation operation includes a vector dot-product operation, wherein the level difference estimation operation includes; determining an energy level in each frame; scaling selected frames relative to each other; and comparing two frames in order to resolve the two frames relative to each other, and wherein the two frames may be amplified or attenuated such that an end user associated with the session hears a similar level of signal. - View Dependent Claims (7, 8, 9, 10)
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11. Software for handling media in a make-before-break handoff between wireless networks, the software being embodied in a computer readable medium and comprising computer code such that when executed is operable to:
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communicate with a mobile station to facilitate a session handoff between two call legs of a session; identify a relevant frame of one of the legs; perform a cross-correlation operation; generate a delay difference estimate between the two legs; and perform a level difference estimation for the two legs, wherein the cross-correlation operation includes a vector dot-product operation, wherein the level difference estimation operation includes; determining an energy level in each frame; scaling selected frames relative to each other; and comparing two frames in order to resolve the two frames relative to each other, and wherein the two frames may be amplified or attenuated such that an end user associated with the session hears a similar level of signal. - View Dependent Claims (12, 13, 14)
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15. A system for handling media in a make-before-break handoff between wireless networks, comprising:
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a mobile station operable to communicate with a mobility application to facilitate a session handoff between two call legs of a session, wherein during the session handoff a relevant frame of one of the legs is identified, a cross-correlation operation is performed, a delay difference estimate is generated, and a level difference estimation is performed for the session, wherein the cross-correlation operation includes a vector dot-product operation, wherein the level difference estimation operation includes; determining an energy level in each frame; scaling selected frames relative to each other; and comparing two frames in order to resolve the two frames relative to each other, and wherein the two frames may be amplified or attenuated such that an end user associated with the session hears a similar level of signal. - View Dependent Claims (16, 17, 18, 19)
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Specification