Cell detection information, such as cell identity, frequency, dormant/active mode, etc. may be determined. This cell detection information may be reported based on properties of a received Auxiliary Synchronization Signal (AuSS) or discovery signal. The received signal may be processed as a function of its timing, for example, with respect to timing of a serving cell. A WTRU may obtain cell detection information for a neighbor cell. A cell may also be detected by surrounding WTRUs. A WTRU may determine timing of cell reactivation from a detected property of the AuSS or discovery signal. A WTRU may trigger an RRC procedure upon selecting a dormant but temporarily reactivated cell. An eNB may transmit AuSS for a dormant cell based on detection of signals received from neighbor cells. Quasi-colocation (QCL) demodulation may be performed based on the detected signal. The on/off state of a cell may be indicated.