公开(公告)号：EP2101538B1

公开(公告)日：2014-10-29

申请号：EP09003203.8

申请日：2009-03-05

申请人： Optis Cellular Technology, LLC

发明人： Sung Jun Park ,  Seung June Yi ,  Young Dae Lee ,  Sung Duck Chun

IPC分类号： H04W74/08 ,  H04B7/26 ,  H04W56/00

CPC分类号： H04B7/2681 ,  H04J11/003 ,  H04J2011/0096 ,  H04W56/0005 ,  H04W56/0045 ,  H04W72/0413 ,  H04W72/0446 ,  H04W74/002 ,  H04W74/0833 ,  H04W88/16

摘要： A method and device for performing uplink synchronization in a contention based random access procedure by a mobile communication terminal in communication with a base station. The method according to an embodiment includes transmitting a random access preamble message to the base station (820); receiving a random access response from the base station (830), the random access response including a timing advance command; determining a status of a mobile communication terminal time alignment timer; and ignoring the timing advance command if the mobile communication terminal time alignment timer is determined to be running in the determining step.