Method for transmitting pilot signal for machine to machine communication in wireless communication system and apparatus thereof

A method for transmitting a pilot signal for machine to machine (M2M) communication by a mobile station in a wireless communication system, the method comprising:

• configuring a basic unit including a plurality of pilot resource elements (REs) and data resource elements;
• allocating pilot signal to the plurality of pilot resource elements in the basic unit;
• and
• transmitting, by a transmitter (Tx), the basic unit in a subframe unit to a receiver in accordance with a rule which is previously defined,
• wherein the resource elements are time-frequency resources defined by one symbol index and one subcarrier index,
• wherein, when the base unit is transmitted in the subframe, a transmission of a control channel is not allowed in the subframe,
• wherein, if the subframe in which the base unit is transmitted is an even numbered subframe, the pilot resource elements included in the even numbered symbol among the pilot resource elements configured in the basic unit are transmitted in the even numbered subtrame, and
• wherein, if the subframe in which the base unit is transmitted is an odd numbered subframe, the pilot resource elements included in the odd numbered symbol among the pilot resource elements configured in the basic unit are transmitted in the odd numbered subframe.