METHOD FOR PERFORMING, BY TERMINAL, RANDOM ACCESS PROCEDURE OVER NETWORK IN WHICH MULTIPLE COMMUNICATION SYSTEMS INTERWORK, AND APPARATUS THEREFOR

摘要

The method for performing a random access procedure by a user equipment in a network in which a plurality of communication systems interwork may comprise: establishing an association with an access point (AP) of a neighboring wireless LAN communication system if it is impossible to perform a direct uplink transmission to a cellular communication system of the plurality of communication systems or that the UE is located in an area where direct uplink transmission is not possible; transmitting, to the AP, a first message including a random access preamble sequence; receiving a second message from a eNode B of the cellular communication system in response to the first message; transmitting, to the AP, a third message including the received second message and a radio resource control (RRC) connection request; and receiving, from the eNode B, a fourth message related to an RRC connection setup in response to the third message.

主权项

1. A method of performing a random access procedure by a user equipment (UE) in a network in which a plurality of communication systems interwork, the method comprising:
if it is impossible to perform a direct uplink transmission to a cellular communication system among a plurality of the communication systems or if the UE recognizes that the UE is located at an area where the direct uplink transmission is impossible, establishing an association with an access point (AP) of a neighboring wireless LAN communication system; transmitting a first message containing a random access preamble sequence to the AP; receiving a second message from an eNode B (eNB) of the cellular communication system in response to the first message; transmitting a third message containing the received second message and an RRC (radio resource control) connection request to the AP; and receiving a fourth message related to an RRC connection setup from the eNB in response to the third message.