Patent ID: 8804598

Claim:
A method comprising: for a communication link between a base station and at least one relay station with which the base station is communicating, allocating a first frequency sub-band; for a communication link between the base station and a first subset of one or more mobile stations with which the base station is communicating, allocating a second frequency sub-band; for a communication link between the at least one relay station and a second subset of one or more mobile stations with which the at least one relay station is communicating, allocating a third frequency sub-band; the at least one relay station performing at least one of: receiving signals on the first frequency sub-band and transmitting signals on the third frequency sub-band simultaneously; and transmitting the signals on the first frequency sub-band and receiving the signals on the third frequency sub-band simultaneously; wherein the first, second and third frequency sub-bands are non-overlapping sub-bands that when aggregated together collectively provide increased bandwidth; and applying transmission power distribution control to reduce interference between transmissions and receptions of the relay station, wherein the applying transmission power distribution control comprises transmitting the signals on the first or third frequency sub-bands using a narrow band signal instead of a wide band signal, the narrow band signal having a higher peak power than the peak power of the wide band signal, to reduce to the size of a guard band between the transmissions and receptions of the relay station.