a parameter related to the discovery resource period, the value of which is an integer. For example, A may be a serial number of the discovery resource period such that the value of A is different when it is in different discovery resource periods.

It should be noted that the value A may be 0.

Or A may be determined based on N or K. For example, A=floor(N/2), or A=floor(K/2), or A is a prime number with respect to N or a prime number with respect to K.

For example, assuming that N=3 and K=8, that is, there are 24 discovery resource elements in a discovery resource period. As shown in FIG. 9a, if a coordinate of a discovery resource element of a UE which sends device discovery signals in the preceding discovery resource period of the current discovery resource period is (1,2), and the value of A is 4, then as shown in FIG. 9b, a coordinate of the resource element which sends the device discovery signals in the current resource period is (2,4). Meanwhile, according to the embodiments described above, a coordinate of a discovery resource element in the next discovery resource period of the current discovery resource period can be acquired too. It should be noted that values of the coordinates described above and values of coordinates described subsequently are merely used for explaining the present disclosure but are not to be construed as a inappropriate limitation to the present disclosure.