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United States Patent | 6,694,147 |
Viswanath , et al. | February 17, 2004 |
Methods and apparatus for scheduling mobile stations (MSs) to download data and/or to control the rate of downloading to an MS from a base station (BS) as a function of downlink channel condition information are described. Artificial channel variations, which can be measured at the MS, and feedback to a BS for scheduling purposes, are introduced through the use of two or more transmitter antennas at a BS. Each of the antennas transmits a signal at the same frequency having the same information content, e.g., modulated data. However the signals are made to differ with time in their phase and/or amplitude to introduce what appear to be channel variations to the MSs.
Inventors: | Viswanath; Pramod (Bedminster, NJ); Laroia; Rajiv (Bedminster, NJ); Tse; David N. C. (Berkeley, CA) |
Assignee: | Flarion Technologies, Inc. (Bedminster, NJ) |
Appl. No.: | 691766 |
Filed: | October 18, 2000 |
Current U.S. Class: | 455/517; 370/318; 370/329; 370/332; 455/436; 455/445 |
Intern'l Class: | H04B 007/00; H04B 007/20 |
Field of Search: | 455/517,436,439,445,513,524,525 370/318,329,330,332,333,334,468 |
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6229795 | May., 2001 | Pankaj et al. | |
6321082 | Nov., 2001 | Katz | 455/422. |
6463301 | Oct., 2002 | Bevan et al. | 455/562. |
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