Automatic system switching in a multiple-mode wireless communication device
First Claim
1. A wireless communication device comprising:
- a processor for generating a first signaling message for transmission to a first communication system having a first pilot signal; and
a transceiver, coupled to said processor, for transmitting said first signaling message to said first communication system and for receiving said first pilot signal and a first acknowledgment message from said first communication system;
wherein said processor automatically generates a second signaling message for transmission to a second communication system having a second pilot signal only if said transceiver does not receive said first acknowledgment message and does receive said first pilot signal.
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Accused Products
Abstract
A wireless communication device which automatically and seamlessly switches to an alternate, available system when it is unable to complete a call origination attempt, without requiring the user to take any affirmative actions to select the alternate system or re-initiate a call origination. The wireless communication device decreases the percentage of call failures by providing a hold-over of pending call origination attempts until service is finally acquired. In the case of either exceeding the maximum number of access sequences (reverse link limited) or failure to acquire the forward link of the preferred communication system (forward link limited), the user is not required to re-initiate the call origination, thus turning a potential call failure into a success.
87 Citations
14 Claims
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1. A wireless communication device comprising:
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a processor for generating a first signaling message for transmission to a first communication system having a first pilot signal; and a transceiver, coupled to said processor, for transmitting said first signaling message to said first communication system and for receiving said first pilot signal and a first acknowledgment message from said first communication system; wherein said processor automatically generates a second signaling message for transmission to a second communication system having a second pilot signal only if said transceiver does not receive said first acknowledgment message and does receive said first pilot signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for automatically switching between a first communication system having a first pilot signal and a second communication system having a second pilot signal, the method comprising the steps of:
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receiving said first pilot signal; generating a first signaling message for transmission to said first communication system; transmitting said first signaling message to said first communication system; automatically generating a second signaling message for transmission to said second communication system only if a first acknowledgment message from said first communication system is not received. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification