Method and system for power control during the traffic channel initialization period in a CDMA network
First Claim
1. A method of controlling the transmit power of a forward link signal between a basestation and a mobile device in a communications network, said method comprising the steps of:
- sending a first signal from the basestation to the mobile device, said first signal having a first signal transmit power;
receiving said first signal at the mobile device;
measuring said first signal for a received signal to noise ratio at the mobile device;
sending a second signal from the mobile device to the basestation, said second signal containing information about said received signal to noise ratio; and
setting the transmit power of the forward link signal based on said received signal to noise ratio information and said first signal transmit power, said setting step including;
estimating a signal component value based on said received signal to noise ratio;
calculating the difference between a desired signal component value and said estimated signal component value; and
assigning the transmit power of said forward link signal to a value obtained by offsetting said first signal transmit power by the difference found in said calculation step.
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Accused Products
Abstract
A method and system of controlling transmit power of a forward link signal between a basestation and a mobile device in a communications network, the method comprising the steps of: sending a first signal from the basestation to the mobile device, the first signal having a first signal transmit power; receiving the first signal at the mobile device; measuring the first signal for a received signal to noise ratio at the mobile device; sending a second signal from the mobile device to the basestation, the second signal containing information about the received signal to noise ratio; and setting the transmit power of the forward link signal based on the received signal to noise ratio information and the first signal transmit power, whereby if the received signal to noise ratio is high the setting step sets the transmit power of the forward link signal lower, and if the received signal to noise ratio is low the setting step sets the transmit power of the forward link signal higher.
46 Citations
35 Claims
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1. A method of controlling the transmit power of a forward link signal between a basestation and a mobile device in a communications network, said method comprising the steps of:
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sending a first signal from the basestation to the mobile device, said first signal having a first signal transmit power;
receiving said first signal at the mobile device;
measuring said first signal for a received signal to noise ratio at the mobile device;
sending a second signal from the mobile device to the basestation, said second signal containing information about said received signal to noise ratio; and
setting the transmit power of the forward link signal based on said received signal to noise ratio information and said first signal transmit power, said setting step including;
estimating a signal component value based on said received signal to noise ratio;
calculating the difference between a desired signal component value and said estimated signal component value; and
assigning the transmit power of said forward link signal to a value obtained by offsetting said first signal transmit power by the difference found in said calculation step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for controlling transmit power of a forward link signal in a communications network, said system comprising:
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a mobile device, said mobile device adapted to;
receive a first signal from a basestation;
evaluate a signal to noise ratio of said first signal; and
transmit information about said received signal to noise ratio to said basestation; and
said basestation, said basestation being adapted to;
send said first signal with a first signal transmit power;
receive said information about the received signal to noise ratio from said mobile device; and
set the transmit power of said forward link signal based on said information about said received signal to noise ratio and said first signal transmit power, said setting of the transmit power in said basestation including;
estimating a value of a signal component of said first signal based on said information about the received signal to noise ratio;
determining a desired value for said signal component; and
setting the transmit power of said forward link signal by adding the difference between the desired signal component value and the estimated signal component value to the first signal transmit power. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 35)
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Specification