Method and apparatus for intelligent dynamic frequency reuse
First Claim
1. In a cellular telephone system including a plurality of fixed stations for transmitting and receiving radio signals from a plurality of mobile cellular phone system users, a method of transmitting signals comprising:
- transmitting a first signal on a selected frequency with a first one of the plurality of fixed stations, the signal being directed to a first one of the plurality of mobile cellular phone users;
receiving a second signal for transmission to a second one of the plurality of mobile cellular phone system users at a second one of the fixed stations, transmissions from the second fixed station on the selected frequency being capable of interfering with reception of transmissions from the first fixed station by the first one of the plurality of mobile cellular phone users;
determining whether a physical obstruction would prevent transmission of the second signal on the selected frequency from the second fixed location from interfering with reception of the first signal by the first one of the plurality of mobile cellular phone users; and
transmitting the second signal from the second one of the fixed stations on the selected frequency when the transmission will not interfere with simultaneous reception of the first signal by the first one of the plurality of mobile cellular phone users.
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Accused Products
Abstract
A method of intelligent dynamic frequency reuse includes transmitting a first signal on a selected frequency with a first one of a plurality of fixed stations, the signal being directed to a first one of a plurality of mobile cellular phone users, receiving a second signal for transmission to a second one of the plurality of mobile cellular phone system users at a second one of the fixed stations, transmissions from the second fixed station on the selected frequency being capable of interfering with reception of transmissions from the first fixed station by the first one of the plurality of mobile cellular phone users, determining whether transmission of the second signal on the selected frequency from the second fixed location would interfere with reception of the first first signal by the first one of the plurality of mobile cellular phone users, and transmitting the second signal from the second one of the fixed stations on the selected frequency when the transmission will not interfere with simultaneous reception of the first signal by the first one of the plurality of mobile cellular phone or receiver units. In one embodiment, the system adjusts the power level of transmissions from the fixed transmission stations to minimize interference. In another embodiment, the system utilizes information provided from the mobile receivers and/or database(s) to simultaneously transmit multiple signals to multiple mobile receivers where physical obstructions block otherwise interfering transmissions.
27 Citations
20 Claims
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1. In a cellular telephone system including a plurality of fixed stations for transmitting and receiving radio signals from a plurality of mobile cellular phone system users, a method of transmitting signals comprising:
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transmitting a first signal on a selected frequency with a first one of the plurality of fixed stations, the signal being directed to a first one of the plurality of mobile cellular phone users;
receiving a second signal for transmission to a second one of the plurality of mobile cellular phone system users at a second one of the fixed stations, transmissions from the second fixed station on the selected frequency being capable of interfering with reception of transmissions from the first fixed station by the first one of the plurality of mobile cellular phone users;
determining whether a physical obstruction would prevent transmission of the second signal on the selected frequency from the second fixed location from interfering with reception of the first signal by the first one of the plurality of mobile cellular phone users; and
transmitting the second signal from the second one of the fixed stations on the selected frequency when the transmission will not interfere with simultaneous reception of the first signal by the first one of the plurality of mobile cellular phone users. - View Dependent Claims (2, 3, 4)
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5. A method of transmitting wireless signals comprising:
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transmitting signals with a first wireless transmitter located at a fixed location on a selected frequency within a predetermined geographic area for reception by a first mobile receiver;
utilizing a propagation path loss data base to determine whether a second fixed-location transmitter may simultaneously transmit signals on the selected frequency within the predetermined geographic area for reception by a second mobile receiver, without interfering with reception of signals transmitted by the first transmitter by a first mobile receiver; and
transmitting signals with the second fixed-location transmitter on the selected frequency for reception by the second mobile receiver when such transmissions will not interfere with reception of signals transmitted by the first transmitter by the first mobile receiver. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a cellular telephone system including fixed stations for transmitting and receiving radio signals from mobile cellular phone units, a method of transmitting signals comprising:
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utilizing a propagation path loss data base to determine whether two or more of the fixed stations may simultaneously transmit signals on a selected frequency to different ones of the mobile cellular units within a predetermined geographical area without interference caused by the simultaneous transmissions;
simultaneously transmitting a plurality of signals from two or more of the plurality of the fixed stations on the selected frequency, each of the signals being directed to a selected one of the mobile cellular phone units; and
continuously adjusting the power level of each transmission on the selected frequency to a level at which the transmissions from the fixed stations on the selected frequency do not interfere with reception of the signals by the selected mobile cellular phone units but is sufficient to enable reception of each transmission directed to a selected one of the mobile cellular phone units by the selected mobile cellular unit. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification