Abstract: A wireless office communication system including a wireless internet base station (WIBS) encompassing a base station controller (BSC), a mobile switch controller (MSC), and an ethernet interface module for coupling the wireless internet base station (WIBS) to an existing internet protocol (IP) based network. A wireless office communication system can also be based on the conventional architecture comprising the base station transceiver subsystem BTS, BSC, and MSC. The WIBS or BTS is attached to a number of antennas via different and identifiable delay elements for the purpose of determining the serving antennas of mobile communication units. A location determination logic enables the system to handle handoffs between a WIBS or BTS and the external public communication system in an optimum manner.

Abstract: A drum washing machine including a water tub, a rotary tub rotatably provided in the water tub, a detergent feed pipe having a first end connected to the water tub and a second end disposed at an inlet of the rotary tub, and a detergent feed unit to feed a detergent contained in the water tub into the rotary tub through the detergent feed pipe, wherein the detergent feed unit dissolves the detergent before feeding the detergent into the rotary tub in response to the detergent being a powdered detergent.

Abstract: A drum washing machine including a water tub, a rotary tub rotatably provided in the water tub, a pumping unit to pump water contained in a lower portion of the water tub into the rotary tub, and a control unit to control the pumping unit, wherein the control unit controls the pumping unit to pump the water contained in the lower portio of the water tub into the rotary tub while determining an amount of a laundry load.

Abstract: A drum washing machine and method of controlling the drum washing machine, which sufficiently dissolves a detergent by reciprocating water and the detergent contained in a lower portion of a water tub between the water tub and a detergent dissolution pipe, thus improving solubility of the detergent. Accordingly, a washing time may be decreased and laundry may be washed more cleanly. The drum washing machine and the method of controlling the drum washing machine of the present invention sufficiently dissolves the detergent in water and then efficiently sprays a detergent solution, in which the detergent dissolves in water, on an upper part of laundry, thus increasing utilization of the detergent. Therefore, a washing time is decreased and washing performance is improved.

Abstract: A drum washing machine, and a method of controlling the drum washing machine including spin-drying laundry by rotating a rotary tub after a washing and/or rinsing operation, wherein the spin-drying of the laundry comprises spraying and feeding water into the rotary tub during a time period wherein the rotary tub is inertially rotated.