A method performed by a terminal in a communication system, the method comprising: receiving, from a base station, first information related to a length of a random access preamble and second information related to a first subcarrier spacing of a random access channel; receiving, from the base station, third information related to a second subcarrier spacing of a physical uplink shared channel, PUSCH; identifying an offset parameter corresponding to the first information, the second information, and the third information based on a predefined table including combinations of the length of the random access preamble, first subcarrier spacings of the random access channel, second subcarrier spacings of the PUSCH, and offset parameters; identifying a frequency resource of the random access channel based on the offset parameter; and transmitting the random access preamble based on the frequency resource, wherein the predefined table includes: a combination of the offset parameter of "7", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 15, a combination of the offset parameter of "1", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 30, a combination of the offset parameter of "133", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 60, a combination of the offset parameter of "10", the length of the random access preamble of 839, the first subcarrier spacing of 5, and the second subcarrier spacing of 30, and a combination of the offset parameter of "7", the length of the random access preamble of 839, the first subcarrier spacing of 5, and the second subcarrier spacing of 60. receiving, from a base station, first information related to a length of a random access preamble and second information related to a first subcarrier spacing of a random access channel; receiving, from the base station, third information related to a second subcarrier spacing of a physical uplink shared channel, PUSCH; identifying an offset parameter corresponding to the first information, the second information, and the third information based on a predefined table including combinations of the length of the random access preamble, first subcarrier spacings of the random access channel, second subcarrier spacings of the PUSCH, and offset parameters; identifying a frequency resource of the random access channel based on the offset parameter; and transmitting the random access preamble based on the frequency resource, wherein the predefined table includes: a combination of the offset parameter of "7", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 15, a combination of the offset parameter of "1", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 30, a combination of the offset parameter of "133", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 60, a combination of the offset parameter of "10", the length of the random access preamble of 839, the first subcarrier spacing of 5, and the second subcarrier spacing of 30, and a combination of the offset parameter of "7", the length of the random access preamble of 839, the first subcarrier spacing of 5, and the second subcarrier spacing of 60. a combination of the offset parameter of "7", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 15, a combination of the offset parameter of "1", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 30, a combination of the offset parameter of "133", the length of the random access preamble of 839, the first subcarrier spacing of 1.25, and the second subcarrier spacing of 60, a combination of the offset parameter of "10", the length of the random access preamble of 839, the first subcarrier spacing of 5, and the second subcarrier spacing of 30, and a combination of the offset parameter of "7", the length of the random access preamble of 839, the first subcarrier spacing of 5, and the second subcarrier spacing of 60.