Configuration of overhead channels in a mixed bandwidth system
First Claim
1. A method of acquiring a sync channel by a mobile station in a mixed bandwidth communications system, said mobile station operable in at least one of a multi-carrier mode and a single carrier mode, comprising:
- tuning to a first preferred channel of a selected set of preferred channels;
attempting to detect a pilot signal on the first preferred channel, wherein the pilot signal has a unique pilot signal offset;
receiving a sync channel message, if the pilot signal is detected on the first preferred channel;
tuning to a second preferred channel of the selected set of preferred channels, if the pilot signal is not detected on the first preferred channel;
if the sync channel message is received, determining the center frequency of a multi-carrier system from the sync channel message in the current set of bands if one exists; and
determining the location of a single carrier band in the current set of bands if one exists.
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Accused Products
Abstract
A method and apparatus for transmitting broadcast information in a multi-carrier communication system. The Sync Channel of the multi-carrier system is transmitted a 1.25 MHz channel bandwidth (i.e., over a single carrier), and to specify the preferred channels for the Sync Channel transmission instead of the preferred channels for the entire multi-carrier system. The Sync Channel Message will carry additional information indicating the center frequency of a multi-carrier system within a reserved set of frequency bands and indicating the frequency of a single carrier system in the reserved set of frequency bands. Considering the A block of the PCS band again, the preferred channels for Sync Channel transmission can be selected as channels 75, 150 and 225. This selection ensures that one of the preferred channels will always be used by any multi-carrier system regardless of the location of its center channel.
65 Citations
19 Claims
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1. A method of acquiring a sync channel by a mobile station in a mixed bandwidth communications system, said mobile station operable in at least one of a multi-carrier mode and a single carrier mode, comprising:
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tuning to a first preferred channel of a selected set of preferred channels; attempting to detect a pilot signal on the first preferred channel, wherein the pilot signal has a unique pilot signal offset; receiving a sync channel message, if the pilot signal is detected on the first preferred channel; tuning to a second preferred channel of the selected set of preferred channels, if the pilot signal is not detected on the first preferred channel; if the sync channel message is received, determining the center frequency of a multi-carrier system from the sync channel message in the current set of bands if one exists; and determining the location of a single carrier band in the current set of bands if one exists. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless device, operable in at least one of a multi-carrier mode and a single carrier mode, and configured to acquire a sync channel in a mixed bandwidth communications system, comprising:
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means for tuning to a first preferred channel of a selected set of preferred channels; means for attempting to detect a pilot signal on the first preferred channel, wherein the pilot signal has a unique pilot signal offset; means for receiving a sync channel message, if the pilot signal is detected on the first preferred channel; means for tuning to a second preferred channel of the selected set of preferred channels, if the pilot signal is not detected on the first preferred channel if the sync channel message is received, means for determining the center frequency of a multi-carrier system from the sync channel message in the current set of bands if one exists; and means for determining the location of a single carrier band in the current set of bands if one exists. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A mobile station, operable in at least one of a multi-carrier mode and a single carrier mode, and configured to acquire a sync channel in a mixed bandwidth communications system, comprising:
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a receiver for tuning to a first preferred channel of a selected set of preferred channels; a control processor for attempting to detect a pilot signal on the first preferred channel, wherein the pilot signal has a unique pilot signal offset; the receiver for receiving a sync channel message, if the pilot signal is detected on the first preferred channel; the receiver for tuning to a second preferred channel of the selected set of preferred channels, if the pilot signal is not detected on the first preferred channel; if the sync channel message is received, the control processor for determining the center frequency of a multi-carrier system from the sync channel message in the current set of bands if one exists; and the control processor for determining the location of a single carrier band in the current set of bands if one exists. - View Dependent Claims (18, 19)
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Specification