System and method to improve WLAN handover behavior at entry/exit points
First Claim
1. A method comprising:
- detecting a signal from an egress portal;
determining that a wireless device is moving from a coverage area of a first wireless communications system to a coverage area of a second wireless communications system in response to detecting the signal from the egress portal;
initiating a registration sequence with the second wireless communication system if the wireless device is not registered with the second wireless communications system, in response to determining that the wireless device is moving from the coverage area of the first communications system to the coverage area of the second communications system; and
conducting one of a present and a subsequent call via the second wireless communication system.
4 Assignments
0 Petitions
Accused Products
Abstract
A system, wireless device (306) and method determine that a wireless device (306) is detecting a triggering event. The triggering event includes detecting a WLAN border cell (210), detecting a first signal from an egress portal (302), or detecting a degradation in signal quality. The wireless device (306) then detects at least one signal from an egress portal (302), determines that the wireless device (306) is moving from the coverage area of a first communications system to the coverage area of a second communications system according to the order of signals received from the egress portal (302), initiates a registration sequence with the second wireless communication system in response to determining that the wireless device (306) is moving from the coverage area of the first communications system to the coverage area of the second communications system, and conducts present and subsequent calls via the second wireless communication system.
142 Citations
32 Claims
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1. A method comprising:
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detecting a signal from an egress portal;
determining that a wireless device is moving from a coverage area of a first wireless communications system to a coverage area of a second wireless communications system in response to detecting the signal from the egress portal;
initiating a registration sequence with the second wireless communication system if the wireless device is not registered with the second wireless communications system, in response to determining that the wireless device is moving from the coverage area of the first communications system to the coverage area of the second communications system; and
conducting one of a present and a subsequent call via the second wireless communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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determining that a wireless device, operating in a first communication system is detecting a wireless local area network border cell;
initiating a registration sequence with a second wireless communication system in response to determining that the wireless device is detecting a wireless local area network border cell;
detecting a second wireless local area network border cell within a predetermined amount of time;
determining that the wireless device is moving from a coverage area of the first communications system to a coverage area of the second communications system in response to detecting a second wireless local area network border cell; and
conducting one of a present and a subsequent call via the second wireless communication system.
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18. A method comprising:
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detecting a triggering event;
detecting a signal from an egress portal in response to detecting a triggering event;
obtaining available wide area network information from a wireless local area network access point; and
scanning for at least one wide area network listed in the available wide area network information. - View Dependent Claims (19)
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20. A mobile communication device comprising:
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at least two transceivers, each transceiver designed to operate on a separate wireless communications system, for transmitting and receiving wireless information;
a controller, communicatively coupled to each transceiver, for managing the operation of the mobile communication device;
a first wireless communications system stack, communicatively coupled to the controller, having instructions for communicating according to its respective protocol;
a second wireless communications system stack, communicatively coupled to the controller, having instructions for communicating according to its respective protocol;
a means for receiving signals from an egress portal; and
a handover manager, communicatively coupled to the controller, the first wireless communications system stack, the second wireless communications system stack, and the means for receiving signals from an egress portal, the handover manager for determining when to handover from the first wireless communication system to the second wireless communication system in response to determining that the means for receiving signals from an egress portal has received at least one signal from the egress portal. - View Dependent Claims (21, 22)
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23. A mobile communication system comprising:
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a structure having at least one entry/exit point;
at least one egress portal located at the at least one entry/exit point, the egress portal for transmitting signals to a mobile communications device;
at least one cell of a wireless local area network communications system, the cell providing communication coverage within the structure;
at least one coverage cell of a second communications system, overlapping the at least one cell of a wireless local area network, for providing communication coverage outside the structure; and
at least one mobile subscriber device, communicatively coupled with the at least one cell of the wireless local area network communications system, and the at least one cell of the second communications system, the device for determining when to handover from one wireless communication system to the second wireless communication system in response to determining that the device has received signals from the at least one egress portal. - View Dependent Claims (24)
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25. A computer readable medium comprising computer instructions for performing the steps of:
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detecting a signal from an egress portal;
determining that a wireless device is moving from a coverage area of a first wireless communications system to a coverage area of a second wireless communications system in response to detecting the signal from the egress portal;
initiating a registration sequence with the second wireless communication system if the wireless device is not registered with the second wireless communications system, in response to determining that the wireless device is moving from the coverage area of the first communications system to the coverage area of the second communications system; and
conducting one of a present and a subsequent call via the second wireless communication system. - View Dependent Claims (26, 27, 28, 29)
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30. A computer readable medium comprising computer instructions for performing the steps of:
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determining that a wireless device, operating in a first communication system is detecting a wireless local area network border cell;
initiating a registration sequence with a second wireless communication system in response to determining that the wireless device is detecting a wireless local area network border cell;
detecting a second wireless local area network border cell within a predetermined amount of time;
determining that the wireless device is moving from a coverage area of the first communications system to a coverage area of the second communications system in response to detecting a second wireless local area network border cell; and
conducting one of a present and a subsequent call via the second wireless communication system.
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31. A computer readable medium comprising computer instructions for performing the steps of:
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detecting a triggering event;
detecting a signal from an egress portal in response to detecting a triggering event;
obtaining available wide area network information from a wireless local area network access point; and
scanning for at least one wide area network listed in the available wide area network information. - View Dependent Claims (32)
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Specification