METHOD AND APPARATUS FOR MONITORING FOR A RADIO LINK FAILURE

摘要

Methods and apparatus are described for monitoring for a radio link failure in a long term evolution-advanced (LTE-A) system operated with carrier aggregation. The methods include criteria for determining radio link failure, recovery events, and the actions that a wireless transmit/receive unit (WTRU) may take upon the occurrence of such events.

主权项

1. 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.