Method employed by a base station for controlling initial power ramp-up using short codes
First Claim
1. A method for power control in a wireless code division multiple access communication system, the method comprising:
- transmitting a first code at a set initial power level and repeating the transmitting of the first code at a first ramp up amount;
detecting an acknowledgement indicating the transmitted first code was received; and
in response to detecting the acknowledgment, transmitting a second code at a power level increased by a second amount, the second code is associated with the first code.
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Abstract
A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
43 Citations
6 Claims
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1. A method for power control in a wireless code division multiple access communication system, the method comprising:
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transmitting a first code at a set initial power level and repeating the transmitting of the first code at a first ramp up amount;
detecting an acknowledgement indicating the transmitted first code was received; and
in response to detecting the acknowledgment, transmitting a second code at a power level increased by a second amount, the second code is associated with the first code.
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2. A wireless code division multiple access subscriber unit, the subscriber unit comprising:
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means for transmitting a first code at a set initial power level and repeating the transmitting of the first code at a first ramp up amount;
means for detecting an acknowledgement indicating the transmitted first code was received; and
means in response to detecting the acknowledgement, transmitting a second code at a power level increased by a second amount, the second code is associated with the first code.
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3. A wireless code division multiple access base station, the base station comprising:
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means for receiving a first code, the first code being initially transmitted at a set initial power level and being repeatedly transmitted at a first ramp up amount;
means for transmitting an acknowledgement indicating the transmitted first code was received; and
means for receiving a second code at a power level increased by a second amount, the second code is associated with the first code.
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4. A method for transmitting a communication in a wireless code division multiple access communication system, the method comprising:
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repeatedly transmitting a portion of the communication without a remainder of the communication and increasing a transmission power of each repetition at a first ramp up rate;
detecting an acknowledgement indicating the transmitted portion was received; and
transmitting the communication including the portion in response to detecting the acknowledgement.
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5. A wireless code division multiple access subscriber unit, the subscriber unit comprising:
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means for repeatedly transmitting a portion of the communication without a remainder of the communication and increasing a transmission power of each repetition at a first ramp up rate;
means for detecting an acknowledgement indicating the transmitted portion was received; and
means for transmitting the communication including the portion in response to detecting the acknowledgement.
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6. A wireless code division multiple access base station, the base station comprising:
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means for receiving a portion of a communication without a remainder of the communication, the portion being transmitted repeatedly at an increasing transmission power level at a first ramp up rate;
means transmitting an acknowledgement indicating the portion was received; and
means for receiving the communication including the portion.
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Specification