Permutation device and method having improved resource granularity for wireless communications
A device and method for permuting subcarriers in a subframe which is divided into a plurality of frequency partitions in a wireless mobile communication system is disclosed. The method includes mapping, at a mobile station, physical resource units for localized resource allocation to a frequency partition of the plurality of frequency partitions in units of N_1 number of resource units, and physical resource units for distributed resource allocation to the frequency partition in units of N_d number of resource units, N_1 being different from N_d; and spreading, at the mobile station, subcarriers of the physical resource units for distributed resource allocation across the whole distributed resource allocations.
1. A method of transmitting a signal in a wireless mobile communication system, the method comprising:
mapping, by a processor in a communication apparatus, groups of physical resource units (PRUs) to groups of sub-band PRUs and first groups of mini-band PRUs;
permuting, by the processor in the communication apparatus, the first groups of mini-band PRUs within a plurality of mini-band PRUs and mapping the permuted first groups of mini-band PRUs to second adjacent mini-band PRUs;
allocating, by the processor in the communication apparatus, the groups of sub-band PRUs and the second adjacent mini-band PRUs to at least one frequency partition; and
transmitting, by a radio frequency (RF) device in the communication apparatus to a receiver apparatus, the signal including the at least one frequency partition,
wherein each of the sub-band PRUs has a mapping unit of N 1 , each of the permuted first groups of mini-band PRUs and the second adjacent mini-band PRUs has a mapping unit of N d , and the mapping unit of N 1 is larger than the mapping unit of N d .
2. The method of claim 1 , wherein N 1 is 4 and N d is 1.
3. The method of claim 1 , wherein the communication apparatus is a base station (BS).
4. A communication apparatus for transmitting a signal in a wireless mobile communication system, the communication apparatus comprising:
a radio frequency (RF) unit; and
a processor coupled to the RF unit and configured to:
map groups of physical resource units (PRUs) to groups of sub-band PRUs and first groups of mini-band PRUs,
permute the first groups of mini-band PRUs within a plurality of mini-band PRUs,
map the permuted first groups of mini-band PRUs to second adjacent mini-band PRUs,
allocate the groups of sub-band PRUs and the second adjacent mini-band PRUs to at least one frequency partition, and
transmit the signal including the at least one frequency partition,
wherein each of the sub-band PRUs has a mapping unit of N 1 , each of the permuted first groups of mini-band PRUs and the second adjacent mini-band PRUs has a mapping unit of N d , and the mapping unit of N 1 is larger than the mapping unit of N d .
5. The communication apparatus of claim 4 , wherein N 1 is 4 and N d is 1.
6. The communication apparatus of claim 4 , wherein the communication apparatus is a base station (BS).