Abstract
Physical layer processing and procedures for device-to-device (D2D) discovery signal generation and transmission and scheduling of D2D discovery signals are described. Detection and measurement of D2D discovery signals, D2D signal identification management, and monitoring of PDCCH by wireless transmit/receive units (WTRUs) for D2D discovery scheduling are described, as are WTRUs that may be configured with D2D specific transmit/receive opportunity patterns. The discovery signal may carry a payload for explicit information about user and/or service identification and may be mapped to physical resources to decouple transmission/reception of discovery signals from downlink operations. The WTRU may measure D2D discovery signal quality and report to the network.
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