Patent ID: 8868092

Claim:
A method of transmitting data by a machine-to-machine (M2M) device in a wireless communication system, the method comprising: transmitting a first ranging request message to a base station, the first ranging request message including an M2M short message service (SMS) request, indicating that the M2M device has an M2M SMS to transmit, if allocated bandwidth is not sufficient for piggybacking an M2M SMS in a ranging request message during network reentry; receiving a first ranging response message from the base station, the first ranging response message including an M2M SMS response which corresponds to the M2M SMS request and informs the M2M device whether the M2M SMS request is accepted or not; transmitting a second ranging request message to the base station if the M2M SMS request is accepted by the base station, the second ranging request message including the M2M SMS; and receiving a second ranging response message from the base station, the second ranging response message including an M2M SMS confirmation indicating whether the reception of the M2M SMS is successful or not by the base station.