Method for a communication device to search for an alternate network upon a registration failure
First Claim
1. A method for a communication device to search for service from an alternate public land mobile network when a public land mobile network rejects a registration message from the communication device, the method comprising the steps of:
- sending a registration message to a public land mobile network;
rejecting of the registration message by the public land mobile network; and
searching for service from the alternate public land mobile network.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for a communication device to search for service from an alternate public land mobile network when a public land mobile network rejects a registration message from the communication device includes a first step of having the device roam to a visited public land mobile network (PLMN). A next step includes sending a registration message to the PLMN. A next step includes rejecting the registration message by the PLMN. This rejection can include ignoring the registration or sending an error message back to the device. A next step then includes searching for service from an alternate public land mobile network.
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Citations
15 Claims
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1. A method for a communication device to search for service from an alternate public land mobile network when a public land mobile network rejects a registration message from the communication device, the method comprising the steps of:
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sending a registration message to a public land mobile network;
rejecting of the registration message by the public land mobile network; and
searching for service from the alternate public land mobile network. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for a communication device to search for service from an alternate public land mobile network when a visited public land mobile network rejects a registration message from the communication device, the method comprising the steps of:
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roaming to a coverage area of a visited public land mobile network sending a registration message to the visited public land mobile network;
receiving a message from the visited public land mobile network indicating that the visited public land mobile network did not understand the registration message; and
searching for service from the alternate public land mobile network. - View Dependent Claims (9, 10, 11)
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12. A method for a communication device to search for service from an alternate public land mobile network when a visited public land mobile network rejects a registration message from the communication device, the method comprising the steps of:
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roaming to a coverage area of a visited public land mobile network sending a registration message to the visited public land mobile network;
ignoring of the registration message by the visited public land mobile network; and
searching for service from the alternate public land mobile network. - View Dependent Claims (13, 14, 15)
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Specification