Method, system and device for determining transmission link type

A method for determining type of transmission link, the method comprising:

• determining, by a network-side device, that there is a data transmission request of a D2D receiving UE over an N2D link, according to a first resource occupancy request over the N2D link, reported by the D2D receiving UE;
• and
• determining, by the network-side device, a type of a transmission link of the D2D receiving UE in a subframe n, upon determining that there is a data transmission request of the D2D receiving UE over the N2D link, wherein the subframe n is a D2D subframe.

A D2D receiving UE for determining type of transmission link, the D2D receiving UE comprising:

• a reporting module configured to report a first resource occupancy request over an 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
• a first determining module configured to determine 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.

20-27. (canceled)