Efficient Allocation of Power to Bandwidth In a Multi-Carrier Cellular Communication System
First Claim
1. In a communication system providing radio coverage over a plurality of distinct geographical regions in which a radio-frequency (RF) bandwidth is divided into a plurality of frequency-division multiplexed (FDM) forward link carriers and repeatedly reused throughout said regions, a method of communicating with an efficient allocation of power to bandwidth comprising:
- providing an antenna for each of said distinct geographical regions;
assigning, for each of said distinct geographical regions, every one of said plurality of FDM forward link carriers to either a first set or a second set of said FDM forward link carriers;
transmitting, from said antenna associated with each of said distinct geographical regions, a radio-frequency signal using said first set of said FDM forward link carriers and said second set of said FDM forward link carriers, wherein;
a strongest member of said second set of said FDM forward link carriers is transmitted at lower power than a weakest member of said first set of FDM forward link carriers, andsaid second set of said FDM forward link carriers has at least one of said FDM forward link carriers and at most 50% of the number of said FDM forward link carriers included in said first set of said FDM forward link carriers.
1 Assignment
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Accused Products
Abstract
A cellular communication system includes a plurality of base stations (20), each of which assigns all frequency division multiplex, forward link carriers (32) to either a high-power set (42) of carriers (32) or a low-power set (44) of carriers (32) to improve system capacity and reduce boundary interference in a K=1 frequency reuse plan. The low-power set (44) has fewer members than the high-power set (42). The carriers (32) are simultaneously transmitted, preferably from an omnidirectional antenna (26). Access terminals (76) are configured to select carriers (32) from low-power set (44) for the receipt of data from base stations (20) when such carriers (32) from low-power set (44) provide an acceptable data rate, even though other carriers (32) may have higher SINR.
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Citations
36 Claims
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1. In a communication system providing radio coverage over a plurality of distinct geographical regions in which a radio-frequency (RF) bandwidth is divided into a plurality of frequency-division multiplexed (FDM) forward link carriers and repeatedly reused throughout said regions, a method of communicating with an efficient allocation of power to bandwidth comprising:
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providing an antenna for each of said distinct geographical regions; assigning, for each of said distinct geographical regions, every one of said plurality of FDM forward link carriers to either a first set or a second set of said FDM forward link carriers; transmitting, from said antenna associated with each of said distinct geographical regions, a radio-frequency signal using said first set of said FDM forward link carriers and said second set of said FDM forward link carriers, wherein; a strongest member of said second set of said FDM forward link carriers is transmitted at lower power than a weakest member of said first set of FDM forward link carriers, and said second set of said FDM forward link carriers has at least one of said FDM forward link carriers and at most 50% of the number of said FDM forward link carriers included in said first set of said FDM forward link carriers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a cellular communication system providing radio coverage over a plurality of distinct geographical regions in which a radio-frequency (RF) bandwidth is divided into a plurality of frequency-division multiplexed (FDM) forward link carriers and repeatedly reused throughout said regions, a method of communicating with an efficient allocation of power to bandwidth comprising:
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providing an antenna for each of said distinct geographical regions; assigning, for each of said distinct geographical regions, all of said plurality of FDM forward link carriers to one of a first set and a second set of said FDM forward link carriers; transmitting, from said antenna associated with each of said distinct geographical regions, a radio-frequency signal using said first set of said FDM forward link carriers and said second set of said FDM forward link carriers, wherein; a strongest member of said second set of said FDM forward link carriers is transmitted at lower power than a weakest member of said first set of said FDM forward link carriers, said first set of said FDM forward link carriers has at least one of said FDM forward link carriers, said second set of said FDM forward link carriers has at least one of said FDM forward link carriers, and data is transmitted over every one of said FDM forward link carriers assigned in said first and second sets. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A cellular communication system providing radio coverage over a plurality of distinct geographical regions in which a radio-frequency (RF) bandwidth is divided into a plurality of frequency-division multiplexed (FDM) forward link carriers and repeatedly reused throughout said regions, said system comprising:
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a plurality of antennas having a one-to-one correspondence with said plurality of distinct geographical regions; and a plurality of transmitters having a one-to-one correspondence with said plurality of distinct geographical regions and with said plurality of antennas, wherein; each transmitter couples to one of said plurality of antennas, each transmitter is included in a base station configured to assign all of said plurality of FDM forward link carriers to either a first set of said FDM forward link carriers or a second set of said FDM forward link carriers, each base station is configured to assign at least one of said plurality of FDM forward link carriers to said second set of said FDM forward link carriers, each base station is configured to assign to said second set of said FDM forward link carriers no more than 50% of the number of said FDM forward link carriers assigned to said first set of said FDM forward link carriers, each transmitter is configured to transmit a radio-frequency signal using said first set of said FDM forward link carriers and said second set of said FDM forward link carriers, and each transmitter is configured to transmit a strongest member of said second set of said FDM forward link carriers at lower power than a weakest member of said first set of said FDM forward link carriers. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. In an access terminal of a cellular communication system providing radio coverage over a plurality of distinct geographical regions in which a radio-frequency (RF) bandwidth is divided into a plurality of frequency-division multiplexed (FDM) forward link carriers and repeatedly reused throughout said regions, a method of communicating with an efficient allocation of power to bandwidth comprising:
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receiving at least a portion of said plurality of FDM forward link carriers, said portion of said plurality of FDM forward link carriers including an FDM forward link carrier preferred for use by said cellular communication system; identifying a threshold data rate which is less than or equal to a maximum data rate expected from a single one of said plurality of FDM forward link carriers; estimating a data rate for each of said portion of received FDM forward link carriers; selecting said preferred one of said FDM forward link carriers for receiving data when said preferred one of said FDM forward link carriers is estimated to provide at least said threshold data rate. - View Dependent Claims (36)
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Specification