—In this paper, an energy-based spectrum sens-ing algorithm is proposed to address the problem of Uplink (UL)/Downlink (DL) resource block identification in a single cell. This framework aims to provide a general UL/DL identification tool for interference management algorithms in autonomus cells. The proposed algorithm is base on the observation that user terminals can be active from any part of the cell during DL. And on the contrary, a base station is only active at one single position during DL. Because of these two spatial properties, UL/DL identification is made impossible with only one single sensing equipment -or Secondary User Equipment (SUE). A multiple soft-sensing framework is introduced, using path-loss as spatial information provider. Theoretical analysis and simulations show that the proposed algorithm achieve high reliability, with an error probability decreasing exponentially to zero in the number of SUE.