A method of supporting reverse channel gating in a BS (Base Station) of a mobile communication system. At a handoff from a first BS to a second BS, the first BS transmits to the second BS information about whether an MS (Mobile Station) transmits data on the channel to the first BS in a reverse gating mode. The second BS determines whether to support the reverse gating mode after the handoff. Then the second BS transmits to the first base station a handoff request acknowledgement message including information whether the second BS supports the reverse gating mode after the handoff.