Patent ID: 9462576
Filing Date: 2016-10-04
CPC Classification: H04L,H04W,Y02D

Claim Text:
1. A method for a user equipment to perform a random access procedure to a network in a mobile communication system, the method comprising: transmitting a first message of the random access procedure comprising a random access preamble to the network; receiving a second message of the random access procedure comprising a medium access control protocol data unit (MAC PDU) via a downlink shared channel, wherein the second message comprises uplink resource allocation information; transmitting a third message of the random access procedure comprising uplink data based on the uplink resource allocation information; and receiving a fourth message of the random access procedure from the network, wherein a HARQ (Hybrid Automatic Repeat Request) scheme is applied from the third message to the fourth message of the random access procedure while the HARQ scheme is not applied to the second message of the random access procedure.