Method and apparatus for efficient selection and acquisition of a wireless communications system
First Claim
1. In a mobile station storing a list of wireless communications systems, a system acquisition procedure comprising the steps of:
- selecting a group of wireless communications systems from the list in accordance with a predetermined system acquisition procedure, the group of wireless communications systems having a first system acquisition order;
measuring a signal quality for each of the selected systems;
reprioritizing the group of wireless communications systems in accordance with the measured signal quality, the reprioritized group of wireless communications systems having a second system acquisition order; and
attempting to acquire the wireless communications system having the highest priority in accordance with the second system acquisition order.
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Accused Products
Abstract
A mobile station includes processing circuitry and a memory. A group of wireless communications systems is selected in accordance with a predetermined system acquisition procedure. A received signal corresponding to each selected system is analyzed to determine a likelihood that the selected system would be acquired by the mobile station. The group of selected systems is reprioritized based on the results of the analysis to produce a more efficient system acquisition sequence. The mobile station then attempts to acquire a selected wireless communications system in accordance with the system acquisition sequence.
91 Citations
23 Claims
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1. In a mobile station storing a list of wireless communications systems, a system acquisition procedure comprising the steps of:
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selecting a group of wireless communications systems from the list in accordance with a predetermined system acquisition procedure, the group of wireless communications systems having a first system acquisition order;
measuring a signal quality for each of the selected systems;
reprioritizing the group of wireless communications systems in accordance with the measured signal quality, the reprioritized group of wireless communications systems having a second system acquisition order; and
attempting to acquire the wireless communications system having the highest priority in accordance with the second system acquisition order. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile station comprising:
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a memory storing a preferred roaming list, the preferred roaming list including a first plurality of system identifiers and corresponding acquisition parameters; and
a processing circuitry adapted to select wireless communications systems from the preferred roaming list in accordance with a predetermined system acquisition procedure, the selected wireless communications systems have a corresponding system acquisition order, wherein the processing circuitry is further adapted to measure a signal quality of each selected system and modify the system acquisition order based on the measured signal qualities, the modified system acquisition order increasing the efficiency of the system acquisition process. - View Dependent Claims (8, 9)
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10. In a multi-mode mobile station adapted to operate in CDMA and AMPS modes, a method for acquiring a wireless communications system comprising the steps of:
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analyzing a signal received on a channel associated with a candidate communications system;
determining, based on the analysis of the received signal, whether the candidate communications system is likely to be available for acquisition by the mobile station; and
attempting to acquire the candidate communications system only if the candidate communications system is likely to be available for acquisition. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. In a wireless device, an integrated circuit comprising:
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a system determination unit adapted to identify candidate communications systems in a current geographic region of the wireless device; and
a searcher coupled to the system determination unit, the searcher adapted to analyze a signal quality of at least one of the identified wireless communications systems to determine a likelihood of whether the wireless communications system will be acquired. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification