Control of transit power during out-of-lock condition
The invention relates generally to wireless communication and, more particularly, to the control of transmit power in a spread spectrum wireless communication system. When all of the fingers of a wireless rake receiver are "out-of-lock," the transmit power is initially maintained at a cons...
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Format | Patent |
Language | English |
Published |
22.06.2004
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Online Access | Get full text |
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Abstract | The invention relates generally to wireless communication and, more particularly, to the control of transmit power in a spread spectrum wireless communication system.
When all of the fingers of a wireless rake receiver are "out-of-lock," the transmit power is initially maintained at a constant level. When the "out-of-lock" condition persists for an extended period of time, transmit power is increased in an effort to reacquire a lock with a subscriber unit or base station, as the case may be. An increase in transmit power may be effective in reacquiring lock when the cause of the out-of-lock condition is slow fading, rather than fast fading. Slow fading may be evidenced by persistence of the out-of-lock condition for an extended period of time. The length of the out-of-lock condition is used to selectively control transmit power and thereby promote quality of service. Transmit power is only increased when the fingers remain out-of-lock for an extended period of time, thereby avoiding undue increases in transmit power that could produce interference among different subscriber units. |
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AbstractList | The invention relates generally to wireless communication and, more particularly, to the control of transmit power in a spread spectrum wireless communication system.
When all of the fingers of a wireless rake receiver are "out-of-lock," the transmit power is initially maintained at a constant level. When the "out-of-lock" condition persists for an extended period of time, transmit power is increased in an effort to reacquire a lock with a subscriber unit or base station, as the case may be. An increase in transmit power may be effective in reacquiring lock when the cause of the out-of-lock condition is slow fading, rather than fast fading. Slow fading may be evidenced by persistence of the out-of-lock condition for an extended period of time. The length of the out-of-lock condition is used to selectively control transmit power and thereby promote quality of service. Transmit power is only increased when the fingers remain out-of-lock for an extended period of time, thereby avoiding undue increases in transmit power that could produce interference among different subscriber units. |
Author | Sendonaris, Andrew |
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References | Blessent et al. (6304563) 20011000 (0167626) 20010900 (0167638) 20010900 Eberhardt (5930288) 19990700 |
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Snippet | The invention relates generally to wireless communication and, more particularly, to the control of transmit power in a spread spectrum wireless communication... |
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Title | Control of transit power during out-of-lock condition |
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