Patent ID: 7957298
Filing Date: 2011-06-07
Classification: H04W

Abstract:
1. A method of detecting a random access channel (RACH) failure, the method comprising: selecting and transmitting, by a mobile terminal, a random access channel (RACH) preamble; checking, by the mobile terminal, whether a random access response (RAR), which includes information about the transmitted RACH preamble, is received within a specified time; if the RAR is not received within the specified time or if the information about the transmitted RACH preamble included in the RAR does not match the transmitted RACH preamble, if the RAR is received within the specified time and if the information about the transmitted RACH preamble included in the RAR matches the transmitted RACH preamble, if the PDCCH including the temporary C-RNTI is not received and contention resolution is considered unsuccessful,