METHOD AND DEVICE FOR ACQUIRING UPLINK SYNCHRONIZATION IN WIRELESS ACCESS SYSTEM SUPPORTING CARRIER AGGREGATION

摘要

The present invention provides a method used in a wireless access system supporting carrier aggregation (CA) for acquiring uplink synchronization from two or more geographically spaced cells, and a device for supporting the same. According to one embodiment of the present invention, a method for acquiring uplink synchronization in a wireless access system supporting CA can comprise the steps of: receiving, from a primacy cell (PCell), random access channel (RACH) information related to a first random access step for matching uplink synchronization in a secondary cell (SCell) to be added to CA; and performing the first random access step for matching uplink synchronization in the SCell on the basis of the RACH information.

主权项

1. A method for acquiring uplink synchronization in a wireless access system supporting Carrier Aggregation (CA), the method comprising:
receiving from a Primacy Cell (PCell) Random Access Channel (RACH) information related to a first random access procedure for acquiring uplink synchronization with a Secondary Cell (SCell) to be added to the CA; and performing the first random access procedure for acquiring uplink synchronization with the SCell, based on the RACH information, wherein the RACH information includes resource allocation information and an RACH parameter, the resource allocation information indicating a resource area of the SCell in which the first random access procedure is to be performed and the RACH parameter being needed for generating an RACH preamble to be used in the first random access procedure.