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 implementing a first communication standard, determine one or more channels in a second wireless communication system implementing a second communication standard based on the information obtained for the first system implementing the first communication standard, and initiate acquisition attempts on the one or more channels in the second system, wherein the one or more channels in the second system are determined based on the information obtained for the first system to limit the number of channels to attempt acquisition for the second system; and
a demodulator operative to process a received signal in accordance with the first standard when receiving the first system and in accordance with the second standard when attempting acquisition on the one or more channels in the second system as indicated by the control unit.
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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.
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Citations
20 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 implementing a first communication standard, determine one or more channels in a second wireless communication system implementing a second communication standard based on the information obtained for the first system implementing the first communication standard, and initiate acquisition attempts on the one or more channels in the second system, wherein the one or more channels in the second system are determined based on the information obtained for the first system to limit the number of channels to attempt acquisition for the second system; and a demodulator operative to process a received signal in accordance with the first standard when receiving the first system and in accordance with the second standard when attempting acquisition on the one or more channels in the second system as indicated by the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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 using a plurality of phases, each phase being associated with a respective wait time, wherein acquisition attempts are initiated on at least one of the one or more channels for each of the plurality of phases, and wherein the control unit is operative to wait for a wait time of more than 180 seconds prior to initiating an acquisition attempt in a last phase of the plurality of phases; and a demodulator operative to process the one or more channels as indicated by the control unit.
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10. An apparatus comprising:
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means for obtaining information for an acquired first wireless communication system implementing a first communication standard; means for determining one or more channels in a second wireless communication system implementing a second communication standard based on the information obtained for the first system implementing the first communication standard and for limiting the number of channels to attempt acquisition for the second 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, 13)
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14. A method of acquisition, comprising:
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obtaining information for an acquired first wireless communication system implementing a first communication standard; determining one or more channels in a second wireless communication system implementing a second communication standard based on the information obtained for the first system implementing the first communication standard and limiting the number of channels to attempt acquisition for the second 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 (15, 16)
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17. A processor readable media for storing instructions operable in a wireless device to:
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obtain information for an acquired first wireless communication system implementing a first communication standard; determine one or more channels in a second wireless communication system implementing a second communication standard based on the information obtained for the first system implementing the first communication standard and limit the number of channels to attempt acquisition for the second system based on the information obtained for the first system; and initiate acquisition attempts on the one or more channels in the second system. - View Dependent Claims (18, 19, 20)
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Specification