Hand-off trigger at access technology borders
First Claim
Patent Images
1. A method for hand-off trigger at access technology borders, comprising:
- acquiring, by a mobile station in communication with a first carrier having a first technology type, synchronization with a second carrier having a second technology type if the mobile station enters a border area, the border area including at least one sector covered by at least two carriers having different Radio Access Technologies (RATs) including the first technology type and the second technology type;
triggering a hand-off of the mobile station to the second carrier ifa channel condition of the second carrier is above a first threshold value, the mobile station fails to receive a second message in response to a first message sent to the first carrier in an expiring time interval, and a number of the first messages have already been sent to the first carrier; and
triggering the hand-off of the mobile station to the second carrier if the channel condition of the second carrier is above the first threshold value, the mobile station receives the second message in response to the first message sent to the first carrier within the expiring time interval, and the message indicates that a distance from the mobile station to the current base station of the first carrier is above the distance threshold.
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Abstract
A method for hand-off trigger at access technology borders may include triggering a mobile station in communication with a first carrier having a first technology type to acquire synchronization with a second carrier having a second technology type if the mobile station enters a border area, the border area including at least one sector covered by at least two carriers having different Radio Access Technologies (RATs) including the first technology type and the second technology type.
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Citations
22 Claims
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1. A method for hand-off trigger at access technology borders, comprising:
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acquiring, by a mobile station in communication with a first carrier having a first technology type, synchronization with a second carrier having a second technology type if the mobile station enters a border area, the border area including at least one sector covered by at least two carriers having different Radio Access Technologies (RATs) including the first technology type and the second technology type; triggering a hand-off of the mobile station to the second carrier if a channel condition of the second carrier is above a first threshold value, the mobile station fails to receive a second message in response to a first message sent to the first carrier in an expiring time interval, and a number of the first messages have already been sent to the first carrier; and triggering the hand-off of the mobile station to the second carrier if the channel condition of the second carrier is above the first threshold value, the mobile station receives the second message in response to the first message sent to the first carrier within the expiring time interval, and the message indicates that a distance from the mobile station to the current base station of the first carrier is above the distance threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for hand-off trigger at access technology borders, comprising:
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monitoring, by a mobile station, paging from a first carrier after synchronization by the mobile station with a second carrier, such that the mobile station determines whether to send a handoff request; triggering a hand-off of the mobile station in communication with the first carrier having a first technology type to the second carrier having a second technology type, the mobile station located in a border area, the border area including at least one sector covered by at least two carriers having different Radio Access Technologies (RATs) including the first technology type and the second technology type, if a link channel condition of the second carrier is above a first threshold value, the mobile station fails to receive a second message in response to a first message sent to the first carrier in an expiring time interval, and a number of the first messages have already been sent to the first carrier; and triggering a hand-off of the mobile station to the second carrier if the link channel condition of the second carrier is above the first threshold value, the mobile station receives the second message in response to the message sent to the first carrier within the expiring time interval, and the first message indicates that a distance from the mobile station to a current base station of the first carrier is above a distance threshold. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for hand-off trigger at access technology borders, comprising:
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monitoring, by a mobile station, paging from a first carrier after synchronization by the mobile station with a second carrier, such that the mobile station determines whether to send a hand-off request; determining, by the mobile station, if the mobile station has exited a border area into an area not being served by the first carrier based on a overhead message on a overhead channel of the second carrier, the border area including at least one sector covered by at least two carriers having different Radio Access Technologies (RATs) including a first technology type and a second technology type, the mobile station having been synchronized with the second carrier upon entering the border area; and triggering a hand-off of the mobile station in communication with the first carrier having the first technology type to the second carrier having the second technology type if the determining step determines that the mobile station has exited the border area. - View Dependent Claims (19, 20, 21, 22)
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Specification