| 摘要 |
An apparatus being a target UE, an initiator UE, or an MME. In one configuration, the apparatus is an initiator UE. The initiator UE determines (812) a network (IP) address of a target UE based on a target expression (i.e. set of characters that a UE broadcasts to help other UEs to discover it), sends (814) a connection request (including target and initiator expressions, and network address or MME address of initiator UE), sends (818) information associated with the target UE to an MME serving the initiator UE (e.g. PDN connection request comprising target UE and initiator UE expressions), and receives (824), from the MME serving the initiator UE, one or more parameters (e.g. one or more security keys and other configurations values) for communicating with the target UE (e.g. in an activate direct bearer context request message comprising a target and initiator UE expressions, the MME of the target UE, and the security key or parameters, usually a result of the negotiation between the MME of the initiator UE and the MME of the target UE). Further, the initiator UE communicates (834) with the target UE based on the one or more parameters (e.g. via a P2P or D2D communication link). |
