Patent ID: 10212703

Abstract:
According to an embodiment of the present invention, a discovery signal transmission method, by a device to device (D2D) terminal in a wireless communication system, comprises the steps of: determining a subframe pool in a discovery period; and transmitting a discovery signal in a subframe comprised in the subframe pool; wherein a frequency resource index and a time resource index, on which a discovery signal is transmitted in another discovery period which follows the discovery period, are determined by means of next_nf=(f_shift+floor((nf+Nf*nt)/Nt)) mod Nf and next_nt=(t_shift+nf+Nf*nt) mod Nt, respectively, wherein Nf is the number of discovery resources per subframe, Nt is the number of subframes per discovery period, f_shift is a frequency shift, t_shift is a subframe shift, nf is a frequency resource index on which the discovery signal is transmitted, nt is a time resource index on which the discovery signal is transmitted, and the f_shift and the t_shift are determined on the basis of the value that is indicated by means of an upper layer parameter.