Patent ID: 8711709

Claim:
A method, implemented by a wireless transmit/receive unit (WTRU), of monitoring for a radio link failure, the method comprising: counting out-of-synch indications from each of a plurality of carriers with a physical downlink control channel (PDCCH) configured for the WTRU, wherein the plurality of carriers with PDCCH configured includes a primary carrier with PDCCH configured associated with a base station and at least one secondary carrier with PDCCH configured associated with another base station; initiating a recovery timer in the WTRU on a condition that a predefined number of out-of-synch indications from the at least one secondary carrier with PDCCH configured was counted; counting in-synch indications from the at least one secondary carrier with PDCCH configured; and transmitting a notification of radio link failure associated with the at least one secondary carrier with PDCCH configured to the primary carrier with PDCCH configured on a condition that the recovery timer expires before a predefined number of in-synch indications is counted.