1. A method for determining type of transmission link, the method comprising:
reporting, by a Device to Device (D2D) receiving UE, a first resource occupancy request over a Network to Device (N2D) link
to a network-side device so that the network-side device determines a type of a transmission link of the D2D receiving UE
in a subframe n upon reception of the first resource occupancy request; and
determining, by the D2D receiving UE, the type of the transmission link in the subframe n according to the type of the subframe
n or received link type indication information from the network-side device, wherein the subframe n is a D2D subframe, and
the type of the transmission link comprises a D2D link and the N2D link.