Patent ID: 9265069
Filing Date: 2016-02-16
CPC Classification: H04L,H04W

Claim Text:
1. A method of performing a random access procedure in a wireless communication system, the method comprising: configuring, by a terminal, a first medium access control (MAC) entity for a first base station; configuring, by the terminal, a second MAC entity for a second base station, wherein the first MAC entity and the second MAC entity are operated independently of each other; receiving, by the first MAC entity of the terminal and from the first base station, an order to instruct the first MAC entity to trigger a first random access procedure; receiving information on an allocation of a delay-tolerable random access preamble dedicated to the first base station; determining whether a second random access procedure is triggered by the second MAC entity on a same subframe where the first random access procedure is triggered, before receiving the information on the allocation of the delay-tolerable random access preamble dedicated to the first base station; selecting the second random access procedure if the first random access procedure and the second random access procedure are concurrently triggered in the single subframe and if the delay-tolerable random access preamble is used for the first random access procedure; and transmitting a second random access preamble for the selected second random access procedure in the single subframe to the second base station.