Method and apparatus for performing plural network attachment procedures to support plural connections in a wireless access system

摘要

A method and apparatus for performing a plurality of network attachment procedures to support a plurality of cells for a small cell-based User Equipment (UE) service are disclosed.

主权项

1. A method for performing a plurality of network attachment procedures to form a User Equipment (UE) zone with a plurality of cells at a UE in a wireless communication system, the method comprising:
receiving, from a macro cell and a plurality of small cells, one or more measurement messages each including at least one of load status information and radio resource usage status information; selecting the macro cell and a first small cell with which the plurality of network attachment procedures are to be performed, based on the one or more measurement messages; transmitting, to the macro cell, an attach request message including an attach type indicating the plurality of network attachment procedures and information about the first small cell; transmitting, to the first small cell, an attach request message including an attach type indicating the plurality of network attachment procedures and information about the macro cell; receiving, from the macro cell, a first Radio Resource Control (RRC) connection reconfiguration message including a first Evolved Packet System (EPS) radio bearer Identifier (ID) used in the macro cell; receiving, from the first small cell, a second RRC connection reconfiguration message including a second EPS radio bearer ID used in the first small cell; and performing data communication by connecting to the macro cell and the first small cell simultaneously using the first EPS radio bearer ID and the second EPS radio bearer ID.