Disclosed is a status report transmission of the PDCP layer for a PDCP status report which can reduce radio resources, by transmitting the reception success or failure of a series of PDCP SDUs in the form of a bitmap when configuring the PDCP status report for reporting a reception status of the PDCP SDU to another party in the PDCP layer in the LTE system. The motor housing has top, bottom and side surfaces defining a substantially cylindrical chamber within which a motor and fan are housed. Communication destined for any of the clients interfaced through the midware is received by the midware and converted to a format suitable for communication with one or more of the subclients prior to transmission thereto.