Patent ID: 8582673

Claim:
A method for mapping physical random access channel, PRACH, W PRACHs having the same time domain location, wherein the serial number of each PRACH is w=0, 1, 2, . . . , W−1, characterized in that the method performed by a processor comprises: mapping the PRACHs with even serial numbers from high frequency to low frequency, or from low frequency to high frequency in a usable frequency band, while mapping the PRACHs with odd serial numbers from low frequency to high frequency, or from high frequency to low frequency in the usable frequency band, and one PRACH occupies 6 continuous resource blocks, RBs, in the frequency domain, and the frequency bands occupied by two adjacent PRACHs in the frequency domain do not overlap, the same mapping process is used for each version number r; or mapping the first half ( w ≤ ⌈ W 2 ⌉ , or ⁢ ⁢ w < ⌈ W 2 ⌉ , or ⁢ ⁢ w ≤ ⌊ W 2 ⌋ , or ⁢ ⁢ w < ⌊ W 2 ⌋ ) of the PRACHs from high frequency to low frequency, or from low frequency to high frequency in the usable frequency band, while mapping the second half of the PRACHs from low frequency to high frequency, or from high frequency to low frequency in the usable frequency band, and one PRACH occupies 6 continuous RBs in the frequency domain, the frequency bands occupied by the two adjacent PRACHs in the frequency domain do not overlap, the same mapping process is used for each version number r; or mapping the PRACHs with even serial numbers from high frequency to low frequency, or from low frequency to high frequency in a usable frequency band, while mapping, the PRACHs with odd serial numbers from low frequency to high frequency, or from high frequency to low frequency in the usable frequency band, and one PRACH occupies 6 continuous RBs in the frequency domain, the frequency bands occupied by two adjacent PRACHs in the frequency domain do not overlap; or mapping the first half ( w ≤ ⌈ W 2 ⌉ , or ⁢ ⁢ w < ⌈ W 2 ⌉ , or ⁢ ⁢ w ≤ ⌊ W 2 ⌋ , or ⁢ ⁢ w < ⌊ W 2 ⌋ ) of the PRACHs from high frequency to low frequency, or from low frequency to high frequency in a usable frequency band, while mapping the second half of the PRACHs from low frequency to high frequency, or from high frequency to low frequency in the usable frequency band, and one PRACH occupies 6 continuous RBs in the frequency domain, the frequency bands occupied by two adjacent PRACHs in the frequency domain do not overlap.