Patent ID: 9572132
Date: 2017-02-14
CPC Classifications: H04L,H04W

Claim:
1. A method for performing downlink data transmission by a first base station in a wireless communication system, the method comprising: receiving at least one data packet through a gateway; identifying whether the at least one data packet is to be transmitted (i) directly to a mobile station, or (ii) to the mobile station through a second base station; performing a packet data convergence protocol (PDCP) layer processing on the at least one data packet and transmitting the PDCP layer processed at least one data packet to the second station, if the at least one data packet is to be transmitted to the mobile station through the second base station; and performing the PDCP layer processing, a radio link control (RLC) layer processing and a medium access control (MAC) layer processing on the at least one data packet and transmitting the PDCP layer, the RLC laver, the MAC layer processed at least one data packet to the mobile station, if the at least one data packet is to be transmitted to directly the mobile station.