Directed maximum ratio combining methods and systems for high data rate traffic
First Claim
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1. A method of transmitting data from a plurality of mobile stations to a base station, the method comprising:
- dividing the plurality of mobile stations into a first and a second group, the first group comprising a first set of mobile stations using a first set of time average data rates and the second group comprising a second set of mobile stations using a second set of time average date rates, wherein the first set of time average data rates is higher than the second set of time average data rates; and
transmitting data from the first set of mobile stations at a higher time average data rate than data transmitted from the second set of mobile stations.
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Abstract
Methods are provided for choosing mobile stations that have low cross correlations between their array response vectors, thereby minimizing inter-cell interference through uneven average reverse link data rates experienced by the mobile stations and minimizing intra-cell interference without explicit implementation of an interference cancellation algorithm, thereby maximizing the reverse link data throughput of a wireless communication system. Selected mobile stations of one or more are transmitted simultaneously to a base station.
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Citations
40 Claims
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1. A method of transmitting data from a plurality of mobile stations to a base station, the method comprising:
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dividing the plurality of mobile stations into a first and a second group, the first group comprising a first set of mobile stations using a first set of time average data rates and the second group comprising a second set of mobile stations using a second set of time average date rates, wherein the first set of time average data rates is higher than the second set of time average data rates; and
transmitting data from the first set of mobile stations at a higher time average data rate than data transmitted from the second set of mobile stations. - View Dependent Claims (2, 3, 4, 5, 32, 33, 35, 37, 38, 39, 40)
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6. A method of transmitting data from a plurality of mobile stations to a base station, the method comprising:
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dividing the mobile stations into a first and a second data rate group;
selecting a first mobile station for transmission, the first mobile station being the first one in a data queue and in the first data rate group;
calculating first cross correlations between array response vectors of the first mobile station and the rest of the mobile stations in the first data rate group;
comparing the first cross correlations to a predetermined threshold;
selecting a second mobile station unless all the first cross correlations are greater than or equal to the predetermined threshold and all second cross correlations between array response vectors of the first mobile station and mobile stations in the second data rate group are greater than or equal to the predetermined threshold; and
transmitting data from said selected mobile stations simultaneously. - View Dependent Claims (7, 8, 9, 10, 11, 13, 15, 16, 17, 18, 19, 20)
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12. A method of transmitting data from a plurality of mobile stations to a base station, the method comprising:
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selecting a first mobile station, the first mobile station being first in a data queue;
calculating cross correlations of array response vectors of the first mobile station and array response vectors of other selected mobile stations;
selecting one or more of the mobile stations based on mobile stations having cross correlations less than a predetermined threshold; and
transmitting simultaneously the selected mobile stations during a next data packet duration.
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14. A method of transmitting data from a plurality of mobile stations to a base station, the method comprising:
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selecting a first mobile station, the first mobile station being first in a data queue;
calculating first cross correlations of array response vectors of the first mobile station with array response vectors of the other mobile stations;
comparing the first cross correlations with a predetermined threshold;
determining a number of first cross correlations less than the predetermined threshold;
selecting additional mobile stations based on the number of cross correlations from a first group of mobile stations corresponding to the first cross correlations less than the threshold; and
transmitting data from the selected mobile stations simultaneously during a next time slot.
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21. A method of selecting from N mobile stations each having an associated measured response vector V, K groups of L mobile stations for each of K communication slots of a wireless communication system, the method comprising:
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(a) determining a list of J mobile stations from the N mobile stations depending on the frequency of desired selection for each of the N mobile stations;
(b) selecting L mobile stations from the list;
(c) calculating a value of a function F of the response vectors V for the L mobile stations;
(d) determining whether the value is less than a predetermined threshold;
(e) repeating steps (b)-(d) if the value is greater than or equal to the predetermined threshold a maximum of M successive times;
(f) selecting the L mobile stations if the value is less the predetermined threshold or selecting from the M groups, the group of L mobile stations having the smallest value if none of the values is less than the predetermined threshold;
(g) removing the selected mobile stations from the list; and
(h) repeating steps (b)-(g) K-1 times. - View Dependent Claims (22, 23, 25, 26, 27, 28, 29, 30, 31, 34, 36)
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24. A system for providing high data rate wireless communication, said system comprising:
scheduler circuitry having a mobile station communication control algorithm, wherein said scheduler circuitry identifies mobile stations of a plurality of mobile stations as of a higher time average data rate mobile station group and other mobile stations of said plurality of mobile stations as of a lower time average data rate mobile station group, and wherein said scheduler circuitry operates to schedule communications with respect to said plurality of mobile stations such that mobile stations of said higher time average data rate group are scheduled for communication more often than mobile stations of said lower time average data rate group.
Specification