Method employed by a base station for controlling initial power ramp-up using short codes
First Claim
1. A method employed by a base station for controlling transmission power during the establishment of communications between a base station and another communicating unit, comprising:
- detecting a periodic signal having an initial predetermined power level, which is repeatedly sent to the base station at increasing power levels;
transmitting a power control signal when a periodic signal having sufficient power for detection is received;
receiving an access signal having a power level controlled by said power control signal; and
wherein said periodic signal comprises a short code and said access signal comprises an access code which is an integer multiple of the short code.
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Abstract
A method employed by 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.
45 Citations
6 Claims
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1. A method employed by a base station for controlling transmission power during the establishment of communications between a base station and another communicating unit, comprising:
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detecting a periodic signal having an initial predetermined power level, which is repeatedly sent to the base station at increasing power levels;
transmitting a power control signal when a periodic signal having sufficient power for detection is received;
receiving an access signal having a power level controlled by said power control signal; and
wherein said periodic signal comprises a short code and said access signal comprises an access code which is an integer multiple of the short code. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification