SYSTEM AND METHOD FOR BROADCASTING PAGE MESSAGES IN POOR COVERAGE REGIONS
First Claim
1. A wireless communications system, comprising:
- a wireless mobile device for requesting a paging channel modulation order; and
an access node comprising;
a modulator for modulating a page message using the paging channel modulation order to produce a modulated page message, anda transmitter for broadcasting the modulated page message to the wireless mobile device.
1 Assignment
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Accused Products
Abstract
A system and method for paging wireless mobile devices selectively varies the effective modulation order of a paging channel to achieve improved coverage in a wireless wide area network (WWAN) cell. In one embodiment, the paging channel modulation order is selected based on a measured signal strength and/or common channel error rate. The selected modulation order is directly related to the quality of the channel environment. In another embodiment, a page message is segregated into base and extended components that are layer modulated. With layered modulation, wireless mobile devices in good coverage regions can successfully demodulate both the base and extended components to recover the entire page message. Wireless mobile devices in poor coverage regions can successfully demodulate the base component of the page message, and then request that the extended component of the page message be re-broadcast as a base component to thereby recover the entire page message.
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Citations
22 Claims
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1. A wireless communications system, comprising:
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a wireless mobile device for requesting a paging channel modulation order; and an access node comprising; a modulator for modulating a page message using the paging channel modulation order to produce a modulated page message, and a transmitter for broadcasting the modulated page message to the wireless mobile device. - View Dependent Claims (2, 3, 4, 5)
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6. A wireless communications system, comprising:
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an access node for broadcasting layer-modulated first and second logical paging channels, the first logical paging channel for transmitting a first page message and the second logical paging channel for transmitting a second page message; a first wireless mobile device configured to demodulate the first logical paging channel to receive the first page message; and a second wireless mobile device configured to demodulate the second logical paging channel to receive the second page message. - View Dependent Claims (7, 8, 9)
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10. An access node for use in a wireless communications system, comprising:
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a processor for separating a page message into a first message component and a second message component; a first encoder for encoding the first message component onto a first logical paging channel; a second encoder for encoding the second message component onto a second logical paging channel; a modulator for layer modulating the first and second logical paging channels to produce a layer-modulated signal; and a transmitter for broadcasting the layer-modulated signal to a wireless mobile device. - View Dependent Claims (11, 12, 13, 14)
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15. A method of broadcasting a page message to a wireless mobile device, comprising:
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separating a paging channel into a plurality of logical channels; selecting one of the logical channels based on a control channel error rate detected for a separate broadcast channel; encoding the page message onto the selected logical channel; layer modulating the selected logical channel and the remaining logical channels to produce a layer-modulated signal; and broadcasting the layer-modulated signal to the wireless mobile device. - View Dependent Claims (16, 17)
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18. A method of broadcasting a page message to a wireless mobile device, comprising:
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separating the page message into a first message component and a second message component; encoding the first message component onto a first logical channel; encoding the second message component onto a second logical channel; layer modulating the first and second logical channels to produce a layer-modulated signal; broadcasting the layer-modulated signal to the wireless mobile device. - View Dependent Claims (19, 20, 21, 22)
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Specification