| CPC H04W 16/14 (2013.01) [H04W 28/0268 (2013.01)] | 16 Claims |

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1. A method performed by a distributed unit (DU) of a first base station in a wireless communication system, the method comprising:
transmitting, to a second base station supporting a second cell that shares a frequency band of a specified range with a first cell of the first base station, a message comprising information related to spectrum sharing via a DU interface; and
receiving, from the second base station, a setup response corresponding to a setup request for the DU interface, via the DU interface,
wherein the setup request is included in the message, and
wherein the information related to the spectrum sharing comprises identification information on the first cell, identification information on the second cell and at least one of a cell identifier (ID) related to the spectrum sharing or resource information related to the first cell or the second cell.
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