Abstract: A multiplexing apparatus and method for reducing packet overhead in a mobile communication network are provided, which can enhance efficiency of a transmission section by performing multiplexing in an application layer and then reducing header quantity of the packet. The method includes the steps of transmitting, at a sending terminal and a receiving terminal, SDP including information on a quantity of transmission data to be multiplexed and then establishing a session, collecting the quantity of transmission data when the transmission data is generated, adding a header to the transmission data, and then multiplexing the transmission data and the header, and then transmitting the packet multiplexed through the established session. In doing so, embodiments of the present invention reduce the fundamentally generated header, whereby transmission overhead in the transmission section of the network can be minimized and efficiency of the transmission section of a wireless network can be maximized.

Abstract: A cell having a separator with pores prevents short-circuiting of the anode and cathode while increasing the internal space of the cell, increasing the injection volume of electrolyte, and decreasing internal gas pressures for longer durability.

Abstract: The unnecessary portion of the separator which prevents the short-circuit between the cathode and the anode In the center of a cylindrical cell is cut off using cutting apparatus or laser beam to increase the inner space of the cell and the electrolyte, and to have higher cell capacity and lower inner pressure of the can while producing gas.

Abstract: A cylindrical cell is fabricated with a cathode, an anode, a separated placed between the cathode and anode, and a separator fragment extending from a winding axis to the initial part of a cathode.