Configuration of overhead channels in a mixed bandwidth system
First Claim
1. A multi-carrier base station, comprising:
- a first transmission subsystem for transmitting some data components of forward link data comprising a sync channel message on at least one of a set of preferred frequency channels included within a predetermined set of frequencies in a personal communications system (PCS) block of frequencies; and
at least one additional transmission subsystem comprising multiple bands of adjacent of said frequency channels each said band including said one of a set of preferred frequency channels for simultaneously transmitting remaining components of said forward link data.
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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.
71 Citations
20 Claims
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1. A multi-carrier base station, comprising:
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a first transmission subsystem for transmitting some data components of forward link data comprising a sync channel message on at least one of a set of preferred frequency channels included within a predetermined set of frequencies in a personal communications system (PCS) block of frequencies; and at least one additional transmission subsystem comprising multiple bands of adjacent of said frequency channels each said band including said one of a set of preferred frequency channels for simultaneously transmitting remaining components of said forward link data. - View Dependent Claims (2, 3, 4)
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5. A method of acquiring a sync channel message using a wireless device operable in at least one of a single carrier mode in a single carrier system and a multi-carrier mode in a multi-carrier system, the method comprising:
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defining a predetermined set of frequencies that each have a channel number associated with a band; tuning to preferred channel numbers until a sync channel message is received, wherein any combination of three adjacent channel numbers includes a preferred channel number upon which the wireless device can receive the sync channel message, wherein tuning to preferred channel numbers until a sync channel message is received, comprises; attempting to receive the sync channel message by tuning to a first preferred channel number located on one of a group of bands including the first through third bands; and if the sync channel message is not received on the group of bands including the first through third bands, attempting to receive the sync channel message by tuning to the first preferred channel number located on one of a group of bands including the second through fourth bands; if the sync channel message is not received on the group of bands including the second through fourth bands, attempting to receive the sync channel message by tuning to a second preferred channel number located on one of a group of bands including the third through fifth bands; if the sync channel message is not received on the group of bands including the third through fifth bands, attempting to receive the sync channel message by tuning to the second preferred channel number located on one of a group of bands including the fourth through sixth bands, wherein channel numbers of the predetermined set of frequencies comprise 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, and 275, and wherein the preferred channel numbers are 75, 150 and 225 such that such that a sync channel message provided anywhere in the predetermined set of frequencies will include one of the preferred channel numbers. - View Dependent Claims (6)
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7. A method of acquiring a sync channel message using a wireless device operable in at least one of a single carrier mode in a single carrier system and a multi-carrier mode in a multi-carrier system, the method comprising:
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defining a predetermined set of frequencies that each have a channel number associated with a band; tuning to preferred channel numbers until a sync channel message is received, wherein any combination of three adjacent channel numbers includes a preferred channel number upon which the wireless device can receive the sync channel message; and deciding to operate, responsive to the sync channel message, in one of the multi-carrier system and the single carrier system. - View Dependent Claims (8, 9)
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10. A method of acquiring a sync channel message using a wireless device operable in at least one of a single carrier mode in a single carrier system and a multi-carrier mode in a multi-carrier system, the method comprising:
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defining a predetermined set of frequencies that each have a channel number associated with a band; and tuning to preferred channel numbers until a sync channel message is received, wherein any combination of three adjacent channel numbers includes a preferred channel number upon which the wireless device can receive the sync channel, wherein tuning to the preferred channel number until a sync channel message is received, comprises; tuning to a first preferred frequency in the predetermined set of frequencies, wherein the first preferred frequency falls within the first through third bands; and determining whether a sync channel message is available in the first through third bands, wherein the sync channel message is divided into three component parts that are each transmitted separately and simultaneously on a different bands; if the sync channel message is not available at the first preferred frequency, tuning to a second preferred frequency in the predetermined set of frequencies, wherein the second preferred frequency falls within the second through fourth bands; and determining whether the sync channel message is available in the second through fourth bands. - View Dependent Claims (11, 12)
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13. A wireless device operable in at least one of a single carrier mode in a single carrier system and a multi-carrier mode in a multi-carrier system, comprising:
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means for storing a predetermined set of frequencies that each have a channel number associated with a band; and means for tuning to preferred channel numbers until a sync channel message is received, wherein any combination of three adjacent channel numbers includes a preferred channel number upon which the wireless device can receive the sync channel message, wherein the means for tuning to preferred channel numbers until a sync channel message is received, comprises; means for attempting to receive the sync channel message by tuning to a first preferred channel number located on one of a group of bands including the first through third bands, and, if the sync channel message is not received on the group of bands including the first through third bands, tuning to the first preferred channel number located on one of a group of bands including the second through fourth bands; if the sync channel message is not received on the group of bands including the second through fourth bands, wherein the means for attempting to receive the sync channel message tunes to a second preferred channel number located on one of a group of bands including the third through fifth bands; if the sync channel message is not received on the group of bands including the third through fifth bands, wherein the means for attempting to receive the sync channel message tunes to the second preferred channel number located on one of a group of bands including the fourth through sixth bands, wherein the channel numbers of the predetermined set of frequencies comprise 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, and 275, and wherein the preferred channel numbers are 75, 150 and 225 such that such that a sync channel message provided anywhere in the predetermined set of frequencies will include one of the preferred channel numbers. - View Dependent Claims (14)
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15. A wireless device operable in at least one of a single carrier mode in a single carrier system and a multi-carrier mode in a multi-carrier system, comprising:
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means for storing a predetermined set of frequencies that each have channel number associated with a band; and means for tuning to preferred channel numbers until a sync channel message is received, wherein any combination of three adjacent channel numbers includes a preferred channel number upon which the wireless device can receive the sync channel message; and means for deciding to operate, responsive to the sync channel message, in one of the multi-carrier system and the single carrier system. - View Dependent Claims (16, 17)
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18. An apparatus for acquiring a sync channel message using a wireless device operable in at least one of a single carrier mode in a single carrier system and a multi-carrier mode in a multi-carrier system, the method comprising:
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means for defining a predetermined set of frequencies that each have a channel number associated with a band; and means for tuning to preferred channel numbers until a sync channel message is received, wherein any combination of three adjacent channel numbers includes a preferred channel number upon which the wireless device can receive the sync channel, wherein tuning to the preferred channel number until a sync channel message is received, comprises; means for tuning to a first preferred frequency in the predetermined set of frequencies, wherein the first preferred frequency falls within the first through third bands; and means for determining whether a sync channel message is available in the first through third bands, wherein the sync channel message is divided into three component parts that are each transmitted separately and simultaneously on a different bands; if the sync channel message is not available at the first preferred frequency, tuning to a second preferred frequency in the predetermined set of frequencies, wherein the second preferred frequency falls within the second through fourth bands; and means for determining whether the sync channel message is available in the second through fourth bands. - View Dependent Claims (19, 20)
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Specification