Utilizing a plurality of uplink carriers and a plurality of downlink carriers for multi-cell communications
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United States of America Patent
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Mar 20, 2018
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app pub date -
Nov 2, 2015
filing date -
Nov 25, 2008
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Abstract
A wireless transmit/receive unit (WTRU) may communicate on a primary cell and a secondary cell. A transceiver of the WTRU may receive a medium access control (MAC) message indicating activation or deactivation of the secondary cell. A processor of the WTRU may start a timer in response to the activation of the secondary cell. The WTRU may deactivate the secondary cell on a condition that the timer expires.
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