FIELD: communication technologies.
SUBSTANCE: communication device determines transmission power for sending random access preamble, while transmission power is related to a shift based on a format of random access preamble. Then, the communication device sends random access preamble with determined transmission power, in which, when formats A1, A2, A3, B1, B2, B3, B4, C0 and C2 of random access preamble are used, corresponding shifts based on the mentioned formats of access preamble are respectively X-3 dB, X-6 dB, X-8 dB, X-3 dB, X-6 dB, X-8 dB, X-11 dB, X+0 dB and X-6 dB, while X is an integer or a decimal number.
EFFECT: ensuring the determination of transmission power for sending random access preamble.
39 cl, 8 dwg, 22 tbl
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