A RS, in general, is a device that relays or repeats communication back and forth between one or more WTRUs and at least one base station. Moreover, distributed communications may include relay stations (RSs). LTE, 802.16, MIMO, or CDMA based networks may also be setup as distributed communications, systems, or networks where one or more WTRUs communicate concurrently with at least two or more base stations using multiple independent, and sometimes simultaneous, communications. The correction of the transmit power in the closed loop may be either accumulated or absolute. For closed loop power control, a power control command provided by a base station is signaled to the WTRU for correcting errors occurring in the open loop power control. Open loop power control may be performed to fully or partially compensate for short-term and/or long-term channel variations that are determined in the WTRU based on downlink channel estimations, channel state information, channel noise modeling, or the like. Many wireless networks support open loop and closed loop power control schemes. Precise power control may also be desirable in systems using multi-user multiple in/multiple out (MU-MIMO) transmissions. Because of resource sharing, it may be desirable to adjust the WTRU's total transmission power in order to achieve a desired quality of service (QoS), acceptable intra-cell and inter-cell interference level, improved cell-edge performance, extended cell coverage, or the like. In a single cell, different data streams that belong to the same wireless transmit/receive unit (WTRU) or different WTRUs may share the same resources.
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In orthogonal frequency division multiplexing (OFDM), single-carrier frequency-division multiple access (SC-FDMA), Long Term Evolution (LTE), 802.16, code division multiple access (CDMA), or other wireless network technologies transmissions from different cells may share the same uplink (UL) resources. This application is related to wireless communications. 3, 2008, all of which are incorporated by reference as if fully set forth herein. 11, 2012, which claims the benefit of U.S. 15/586,800 filed May 4, 2017, which is a continuation of U.S.
This application is a continuation of U.S.
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