Method and system for performing a handoff in a wireless communication system, such as a hard handoff
First Claim
1. An apparatus comprising:
- a quality measurement circuit; and
a power control processor configured to tune a receiver to a first frequency during an initial portion of a first frame, to tune the receiver on a second frequency during a search excursion period, wherein the search excursion period begins during the first frame and continues through an initial portion of a second frame, wherein the second frame follows immediately after the first frame, to direct the quality measurement circuit to measure measuring at least one signal attribute on the second frequency during the search excursion period, and to tune the receiver on the first frequency during a remaining portion of the second frame.
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Accused Products
Abstract
A method for minimizing search time and disruption of current service on an originating frequency during a frequency search excursion to a target frequency as part of an inter-frequency hard handoff between cells on different RF CDMA channels. Disruption of service on the current frequency during the frequency search excursion to the target frequency is minimized by increasing the amount of power allocated to other symbols of two consecutive frames impacted by the search excursion as a function of the search excursion time. The mobile station tunes to a target frequency and collects chip samples, which are stored in a memory buffer. The mobile station returns to the originating frequency to process the collected samples.
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Citations
18 Claims
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1. An apparatus comprising:
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a quality measurement circuit; and
a power control processor configured to tune a receiver to a first frequency during an initial portion of a first frame, to tune the receiver on a second frequency during a search excursion period, wherein the search excursion period begins during the first frame and continues through an initial portion of a second frame, wherein the second frame follows immediately after the first frame, to direct the quality measurement circuit to measure measuring at least one signal attribute on the second frequency during the search excursion period, and to tune the receiver on the first frequency during a remaining portion of the second frame. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for measuring signal strength in a wireless communication system comprising:
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operating a receiver on a first frequency during an initial portion of a first frame;
operating the receiver on a second frequency during a search excursion period, wherein the search excursion period begins during the first frame and continues through an initial portion of a second frame, wherein the second frame follows immediately after the first frame;
measuring at least one signal attribute on the second frequency during the search excursion period; and
operating the receiver on the first frequency during a remaining portion of the second frame. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus for measuring signal strength in a wireless communication system comprising:
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means for operating a receiver on a first frequency during an initial portion of a first frame;
means for operating the receiver on a second frequency during a search excursion period, wherein the search excursion period begins during the first frame and continues through an initial portion of a second frame, wherein the second frame follows immediately after the first frame;
means for measuring at least one signal attribute on the second frequency during the search excursion period; and
means for operating the receiver on the first frequency during a remaining portion of the second frame. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification