Hand-off technique for a wireless network
First Claim
1. A method comprising:
- initiating a hand-off procedure for a mobile device migrating between a first mobile switching center and a second mobile switching center;
determining that the hand-off procedure is being attempted during the initiation of a call to the mobile device from an associated communication device;
determining that the mobile device answers the call during the hand-off procedure, the mobile device still being within a geographic area corresponding to the first mobile switching center; and
,transmitting a message from the first mobile switching center to the second mobile switching center, the message indicating that the call was answered.
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Accused Products
Abstract
A technique that relates to use of a known messaging sequence, e.g., ISANSWER messaging in the IS-41 protocol, in a heretofore unknown manner to improve hand-off procedures that may be established between a serving (anchor or intermediate) mobile switching center and a target (or border) mobile switching center is provided. Specifically, the ISANSWER message is selectively sent from the serving mobile switching center to the target mobile switching center during the hand-off process. The transmission of the ISANSWER message in this manner allows the target mobile switching center to terminate ring back to a caller when the mobile station answers the call after the handoff has been started, but while the mobile station is still within a cell area of the serving mobile switching center.
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Citations
20 Claims
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1. A method comprising:
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initiating a hand-off procedure for a mobile device migrating between a first mobile switching center and a second mobile switching center; determining that the hand-off procedure is being attempted during the initiation of a call to the mobile device from an associated communication device; determining that the mobile device answers the call during the hand-off procedure, the mobile device still being within a geographic area corresponding to the first mobile switching center; and
,transmitting a message from the first mobile switching center to the second mobile switching center, the message indicating that the call was answered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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means for initiating a hand-off procedure for a mobile device migrating between a first mobile switching center and a second mobile switching center; means for determining that a communication device is attempting to establish a call with the mobile device during the hand-off procedure; means for determining that the mobile device answers the call during the hand-off procedure, the mobile device being within a geographic area corresponding to the first mobile switching center; and
,means for transmitting a message from the first mobile switching center to the second mobile switching center, the message indicating that the call was answered. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system comprising:
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a first MSC operative to initiate a hand-off procedure for a mobile device migrating out of a geographic area corresponding to the first MSC, determine that a communication device is attempting to establish a call with the mobile device during the hand-off procedure, determine that the mobile device answers the call during the hand-off procedure while the mobile device is within the geographic area corresponding to the first MSC and transmit a message indicating that the call was answered; and
,a second MSC operative to receive the message and end ring back based on the message. - View Dependent Claims (18, 19, 20)
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Specification