Method of performing random access in mobile communication system and apparatus for the same

摘要

A method of performing a random access in a mobile communication system and an apparatus for the same are disclosed. The method of performing a random access includes transmitting a random access preamble to a network node and receiving a random access response from the network node, wherein the random access response is received through a first subframe if the random access preamble is a dedicated preamble, and the random access response is received through a second subframe which is different from the first subframe if the random access preamble is a non-dedicated preamble.

主权项

1. A method of performing a random access at a relay node in a mobile communication system, the method comprising:
a) transmitting a random access preamble in a specific subframe to a base station; b) if the random access preamble is a dedicated preamble, monitoring a Relay-Physical Downlink Control Channel (R-PDCCH) in a data region of a Multicast Broadcast over a Single Frequency Network (MBSFN) subframe, and receiving a random access response included in a Relay-Physical Downlink Shared Channel (R-PDSCH) in the data region of the MBSFN subframe based on the R-PDCCH from the base station; and c) if the random access preamble is a non-dedicated preamble, monitoring a Physical Downlink Control Channel (PDCCH) in a control region of a non-Multicast Broadcast over a Single Frequency Network (non-MBSFN) subframe, and receiving the random access response included in a Physical Downlink Shared Channel (PDSCH) in the data region of the non-MBSFN subframe based on the PDCCH from the base station, wherein the MBSFN subframe and the non-MBSFN subframe are located within a predetermined window after the specific subframe, and wherein the starting subframe of the predetermined window for the MBSFN subframe is different from the starting subframe of the predetermined window for the non-MBSFN subframe.