Patent ID: 8060105

Claim:
A method of determining resources used for direct communication between two terminals in a communication system, the method comprising: determining uplink frequency resources of a cellular communication system for use in the direct communication between the two terminals; determining a primary maximum transmission power to minimize interference caused by the direct communication on the cellular communication system; and performing the direct communication between the two terminals using the uplink frequency resources and a transmission power less than the determined primary maximum transmission power, wherein the performing of the direct communication comprises one of a first scheme and a second scheme, wherein the first scheme comprises dividing the uplink frequency resources according to a method that is the same as that of dividing the uplink frequency resources used by a base station, determining a plurality of hopping patterns used for the direct communication with regard to the divided uplink frequency resources, informing one or more target terminals that perform the direct communication about a pattern selected from the plurality of hopping patterns, and performing the direct communication by using frequency resources according to the selected pattern, and wherein the second scheme comprises dividing the uplink frequency resources according to a method that is different from that of dividing the uplink frequency resources of the cellular communication used by the base station, and performing the direct communication by using the divided uplink frequency resources.