METHOD AND APPARATUS FOR DETECTING RANDOM ACCESS FAILURE IN COMMUNICATION SYSTEM BASED ON CARRIER AGGREGATION

摘要

A method and detection apparatus for detecting Physical Random Access CHannel (PRACH) transmission failure in a wireless communication system based on carrier aggregation technology are provided by the invention. A user equipment receives the configuration information from a base station, the configuration information is used for noticing the PRACH resource configuration mode and the PRACH re-transmission strategy to the user equipment; according to the configuration information, the PRACH transmissions on all the uplink component carriers configured with PRACH resource are judged whether they are failed or not; if the PRACH transmissions on all the uplink component carriers configured with PRACH resource are failed, a first notification message is sent from the Media Access Control (MAC) layer to the Raido Resource Control (RRC) Layer, wherein the first notification message is used for noticing that the PRACH transmissions on all the uplink component carriers configured with PRACH resource are failed. With the applications of the method and detection apparatus of the invention, the PRACH transmission failure detection can be implemented in the condition of combining different PRACH resource configuration modes and PRACH re-transmission strategies, in wireless communication system based on carrier aggregation technology.