此处大致地揭示用于长程演进网络中封包式设备对设备(D2D)探索之用户设备(UE)和方法之实施例。在某些实施例中，用户设备能够用于邻近服务以及配置成从eNB接收标示分配用于设备对设备探索的资源之发讯。用户设备根据预定配置而将探索封包配置成具有至少探索酬载及循环冗余检查(CRC)。探索酬载包含探索有关的内容。用户设备配置成在至少某些标示的资源上载送探索封包，用于由接收的用户设备接收。在某些实施例中，将解调制参考信号(DMRS)选择成标示探索封包的酬载之酬载大小及/或调制和码化设计。

Embodiments of a User Equipment (UE) and methods for packet based device-to-device (D2D) discovery in an LTE network are generally described herein. In some embodiments, UE may be enabled for proximity services and may be configured to receive signaling from an enhanced node B (eNB) indicating resources allocated for D2D discovery. The UE may configure a discovery packet in accordance with a predetermined configuration to have at least a discovery payload and a cyclic-redundancy check (CRC). The discovery payload may include discovery-related content. The UE may be configured to transmit the discovery packet on at least some of the indicated resources for receipt by a receiving UE. In some embodiments, a demodulation reference signal (DMRS) may be selected to indicate a payload size and/or MCS of the discovery packet's payload.