Frequency reuse in wireless communication networks
First Claim
Patent Images
1. A method for frequency reuse in a wireless communication system, comprising:
- allocating available frequency channels at different channel frequencies for a base station into a nonreusable frequency pool for channel frequencies designated for use by the base station only, a reusable frequency pool for channel frequencies that can be used by the base station and neighboring base stations, and an unallocated frequency pool for channel frequencies that are not allocated to the nonreusable and the reusable frequency pool;
allocating a channel frequency from either the reusable frequency pool or the unallocated frequency pool to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the base station only; and
allocating a channel frequency from the nonreusable frequency pool for the base station to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station.
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Abstract
Methods and systems for implementing frequency reuse techniques in wireless communication systems such as OFDM systems.
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Citations
18 Claims
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1. A method for frequency reuse in a wireless communication system, comprising:
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allocating available frequency channels at different channel frequencies for a base station into a nonreusable frequency pool for channel frequencies designated for use by the base station only, a reusable frequency pool for channel frequencies that can be used by the base station and neighboring base stations, and an unallocated frequency pool for channel frequencies that are not allocated to the nonreusable and the reusable frequency pool; allocating a channel frequency from either the reusable frequency pool or the unallocated frequency pool to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the base station only; and allocating a channel frequency from the nonreusable frequency pool for the base station to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for frequency reuse in a wireless communication system, comprising:
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allocating available frequency channels at different channel frequencies for a base station and its neighboring base stations into a nonreusable frequency pool for channel frequencies designated for use by the base station only, and a reusable frequency pool for channel frequencies that can be used by the base station and its neighboring base stations; allocating a channel frequency from the reusable frequency pool to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the base station only; and allocating a channel frequency from the nonreusable frequency pool for the base station to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station. - View Dependent Claims (9, 10, 11, 12)
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13. A method for frequency reuse in a wireless communication system, comprising:
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allocating available frequency channels at different channel frequencies in the wireless communication system into an allocated frequency pool for channel frequencies allocated to base stations, and a unallocated frequency pool for channel frequencies that can be used by any base station in communication with any subscribed station at any location relative to the any base station; allocating a reusable channel frequency allocated to a base station from the allocated frequency pool to a wireless subscriber station in communication with a second base station adjacent to the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the second base station; and allocating a nonreusable channel frequency from the allocated frequency pool for the base station assigned with the nonreusable channel frequency to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station. - View Dependent Claims (14)
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15. A wireless communication system, comprising:
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a plurality of base stations spatially distributed to wirelessly communicate with subscriber stations via radio links that comprise orthogonal frequency division multiplexing (OFDM) subcarriers; a plurality of base station controllers, each coupled to control and communicate with at least two base stations within the plurality of base stations; and a mechanism to control the plurality of base stations and the plurality of base station controllers to; allocate available frequency channels at different channel frequencies for a base station and its neighboring base stations into a nonreusable frequency pool for channel frequencies designated for use by the base station only, and a reusable frequency pool for channel frequencies that can be used by the base station and its neighboring base stations; allocate a channel frequency from the reusable frequency pool to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the base station only; and allocate a channel frequency from the nonreusable frequency pool for the base station to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station.
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16. A wireless communication system, comprising:
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a plurality of base stations spatially distributed to wirelessly communicate with subscriber stations via radio links that comprise orthogonal frequency division multiplexing (OFDM) subcarriers; a plurality of base station controllers, each coupled to control and communicate with at least two base stations within the plurality of base stations; and a mechanism to control the plurality of base stations and the plurality of base station controllers to; allocate available frequency channels at different channel frequencies for a base station into a nonreusable frequency pool for channel frequencies designated for use by the base station only, a reusable frequency pool for channel frequencies that can be used by the base station and neighboring base stations, and an unallocated frequency pool for channel frequencies that are not allocated to the nonreusable and the reusable frequency pool; allocate a channel frequency from either the reusable frequency pool or the unallocated frequency pool to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the base station only; and allocate a channel frequency from the nonreusable frequency pool for the base station to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station.
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17. A wireless communication system, comprising:
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a plurality of base stations spatially distributed to wirelessly communicate with subscriber stations via radio links that comprise orthogonal frequency division multiplexing (OFDM) subcarriers; a plurality of base station controllers, each coupled to control and communicate with at least two base stations within the plurality of base stations; and a mechanism to control the plurality of base stations and the plurality of base station controllers to; allocate available frequency channels at different channel frequencies in the wireless communication system into an allocated frequency pool for channel frequencies allocated to base stations, and a unallocated frequency pool for channel frequencies that can be used by any base station in communication with any subscribed station at any location relative to the any base station; allocate a reusable channel frequency allocated to a base station from the allocated frequency pool to a wireless subscriber station in communication with a second base station adjacent to the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the second base station; and allocate a nonreusable channel frequency from the allocated frequency pool for the base station assigned with the nonreusable channel frequency to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station.
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18. An article comprising one or more machine-readable storage media that store machine-executable instructions operable to cause a machine to:
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allocate available frequency channels at different channel frequencies for a base station and its neighboring base stations into a nonreusable frequency pool for channel frequencies designated for use by the base station only, and a reusable frequency pool for channel frequencies that can be used by the base station and its neighboring base stations; allocate a channel frequency from the reusable frequency pool to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a non-hand-off zone to communicate with the base station only; and allocate a channel frequency from the nonreusable frequency pool for the base station to a wireless subscriber station in communication with the base station when the wireless subscriber station is in a hand-off zone to communicate with the base station and at least one neighboring base station.
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Specification