The embodiment of the invention provides a data transmission method, equipment and system of D2D, so as to solve at least the problem of how to find a UE in the network coverage as relay UE in the existing technology, and transmit the information of UE outside the network coverage to the base station. The method includes: a first message to the source UE N candidate UE sent the first message to indicate the source of UE data needs to be transmitted to the base station, the base station for the source UE network coverage of UE n, a candidate UE for the base station network covering a range of UE; source UE receives n second message from n the candidate UE in which each candidate UE N candidate in UE to the source UE sends a second message, the second message includes status information for each candidate UE user ID and / or each candidate UE source; UE according to the state information of each candidate UE user ID and / or each candidate UE information, determine the relay UE from the N candidate UE, and the data is transmitted to a base station through the relay UE. The invention is suitable for the field of wireless communication.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请,说明书已公开。
【技术保护点】
PCT国内申请,权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请,...
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