Patent ID: 8406157

Claim:
A communication method of a user equipment using a time division duplex (TDD) frame in a wireless communication system, the method comprising: configuring a TDD frame for a first system, the TDD frame comprising at least one downlink subframe and at least one uplink subframe; and transmitting a signal by using the TDD frame, wherein an uplink of the TDD frame starts on the basis of a guard period (GP) or an uplink pilot time slot (UpPTS) of a heterogeneous TDD frame for second for a second system, and wherein a ratio of a number of the at least one downlink subframe in TDD frame and a number of the at least one uplink subframe in the TDD frame is determined based on a ratio of a number of downlink subframes in the heterogeneous TDD frame and a number of uplink subframes in the heterogeneous TDD frame and a point where the uplink of the TDD frame starts.