Radio resource mapping method

A radio resource mapping method, in which a wireless communication system maps subcarriers to resource units through external permutation and internal permutation, wherein the external permutation comprises:

• Performing, by a base station, the first permutation on n physical resource units in every N1 physical resource units, orderly selecting n1×N1 physical resource units from the n physical resource units obtained from the first permutation, and performing, by the base station, the second permutation on remaining n−n1×N1 physical resource units in every N2 physical resource units, wherein n, N1, and N2 are all integers greater than or equal to 1, and N1 is not equal to N2, and n1 is an integer greater than or equal to 0, and n, n1, N1, and N2 are less than or equal to the amount of physical resource units;
• after the external permutation, the method further comprising:
• mapping the n physical resource units after the external permutation to frequency partitions;
• and
• partitioning the physical resource units manned to the frequency partitions into localized resource groups and/or distributed resource groups through sector-specific permutation and/or direct mapping;
• wherein the internal permutation comprises:
• permuting resource units in the distributed resource groups into logical distributed resource units, and directly mapping resource units in the localized resource groups into logical localized resource units.