Method and apparatus for performing acquisition in power save mode for wireless communication systems
First Claim
1. A wireless device comprising:
- a control unit operative to obtain information for an acquired first wireless communication system, determine one or more channels in a second wireless communication system based on the information obtained for the first system, and initiate acquisition attempts on the one or more channels in the second system; and
a demodulator operative to process the one or more channels as indicated by the control unit.
1 Assignment
0 Petitions
Accused Products
Abstract
Techniques to efficiently attempt acquisition of a packet data system (e.g., an IS-856 system). If a terminal has acquired one or more channels in a voice/data system (e.g., an IS-2000 system), then it can attempt acquisition on channels in the packet data system that are co-located with the acquired channels in the voice/data system. Multiple acquisition modes may be used, and on-going acquisition attempts on the co-located channels may be performed using one acquisition mode at a time in order to reduce power consumption. Acquisition attempts may be performed in a “ping-pong” manner to improve the likelihood of acquisition. For a ping-pong search, an acquisition attempt is made on the most recently acquired channel prior to an acquisition attempt on each of the remaining channels. Received signal strength estimates may also be obtained for selected channels and may be used to determine whether or not to attempt acquisition on these channels.
31 Citations
34 Claims
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1. A wireless device comprising:
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a control unit operative to obtain information for an acquired first wireless communication system, determine one or more channels in a second wireless communication system based on the information obtained for the first system, and initiate acquisition attempts on the one or more channels in the second system; and
a demodulator operative to process the one or more channels as indicated by the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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means for obtaining information for an acquired first wireless communication system;
means for determining one or more channels in a second wireless communication system based on the information obtained for the first system; and
means for initiating acquisition attempts on the one or more channels in the second system. - View Dependent Claims (11, 12)
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13. A method of acquisition, comprising:
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obtaining information for an acquired first wireless communication system;
determining one or more channels in a second wireless communication system based on the information obtained for the first system; and
initiating acquisition attempts on the one or more channels in the second system. - View Dependent Claims (14)
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15. A wireless device comprising:
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a control unit operative to determine a set of channels in a wireless communication system on which to attempt acquisition, initiate acquisition attempts on the channels in the set using a first acquisition mode, and then initiate acquisition attempts on the channels in the set using a second acquisition mode; and
a demodulator operative to process each of the channels in the set at a particular time and using a particular acquisition mode indicated by the control unit. - View Dependent Claims (16, 17, 18, 19, 20)
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21. An apparatus comprising:
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means for determining a set of channels in a wireless communication system on which to attempt acquisition;
means for initiating acquisition attempts on the channels in the set using a first acquisition mode; and
means for initiating acquisition attempts on the channels in the set using a second acquisition mode. - View Dependent Claims (22)
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23. A wireless device comprising:
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a control unit operative to determine a set of channels in a wireless communication system on which to attempt acquisition and to initiate acquisition attempts on the channels in the set, wherein acquisition is attempted on a first channel in the set prior to an acquisition attempt on each of the remaining channels in the set; and
a demodulator operative to process each of the channels in the set at a particular time indicated by the control unit. - View Dependent Claims (24)
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25. An apparatus comprising:
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means for determining a set of channels in a wireless communication system on which to attempt acquisition; and
means for initiating acquisition attempts on the channels in the set, wherein acquisition is attempted on a first channel in the set prior to an acquisition attempt on each of the remaining channels in the set.
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26. A wireless device comprising:
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a control unit operative to determine a set of channels in a wireless communication system on which to attempt acquisition, obtain received signal strength estimates for the channels in the set, and initiate acquisition attempts on the channels in the set based on the received signal strength estimates obtained for the channels; and
a demodulator operative to process each of the channels in the set at a particular time indicated by the control unit and to provide symbols used to obtain a received signal strength estimate for the channel. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. An apparatus comprising:
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means for determining a set of channels in a wireless communication system on which to attempt acquisition;
means for obtaining received signal strength estimates for the channels in the set; and
means for initiating acquisition attempts on the channels in the set based on the received signal strength estimates obtained for the channels.
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Specification