Prioritizing pilot set searching for a CDMA telecommunications system
First Claim
1. A method to perform a pilot channel search for use in a mobile station that maintains a Neighbor Set, Candidate Set, and Active Set of pilot channels, comprising steps of:
- placing dropped pilot channels in a Dropped Pilot Channel Set;
placing strongest neighbor pilot channels in a Priority Neighbor Pilot Channel Set; and
searching the Dropped Pilot Channel Set and the Priority Neighbor Pilot Channel Set as separate pilot channel search sets.
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Abstract
This invention teaches methods, and circuits that operate in accordance with the methods, for improving the management and control of pilot channel sets for a CDMA mobile station. In one aspect a Priority Neighbor Search technique is provided, wherein a list of Priority Neighbor pilot channels is maintained and searched with a higher priority than the Neighbor Set pilot channels. In a further aspect this invention provides a Dropped Pilot Channel Search technique wherein a set is made of the last pilot channel or pilot channels dropped from the Active Set, wherein the dropped pilot channels are searched for some period of time with a higher priority than the Neighbor Set pilot channels. This invention also provides a High Priority Search Set feature which includes members of the Active Set, the Candidate Set, the Dropped Pilot Set, and the Priority Neighbor Set.
27 Citations
8 Claims
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1. A method to perform a pilot channel search for use in a mobile station that maintains a Neighbor Set, Candidate Set, and Active Set of pilot channels, comprising steps of:
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placing dropped pilot channels in a Dropped Pilot Channel Set; placing strongest neighbor pilot channels in a Priority Neighbor Pilot Channel Set; and searching the Dropped Pilot Channel Set and the Priority Neighbor Pilot Channel Set as separate pilot channel search sets. - View Dependent Claims (2)
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3. A method to perform a pilot channel search for use in a mobile station that maintains a Neighbor Set, Candidate Set, and Active Set of pilot channels, comprising steps of:
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placing dropped pilot channels in a Dropped Pilot Channel Set; placing strongest neighbor pilot channels in a Priority Neighbor Pilot Channel Set; and forming a composite pilot channel set comprised of members of the Active Set, the Candidate Set, members of the Dropped Pilot Channel Set and the Priority Neighbor Pilot Channel Set in accordance with a selected ratio. - View Dependent Claims (4, 5)
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- 6. A mobile station comprising a controller for placing dropped pilot channels in a Dropped Pilot Channel Set, for placing strongest neighbor pilot channels in a Priority Neighbor Pilot Channel Set, and for forming a composite pilot channel set comprised of members of an Active Set, a Candidate Set, the Dropped Pilot Channel Set and the Priority Neighbor Pilot Channel Set, said controller selecting pilot channels in a ratio of x pilot channels from the Priority Neighbor Pilot Channel Set for every y pilot channels from the Dropped Pilot Channel Set.
Specification