Portable file server for wirelessly transmitting and receiving data to and from a terminal wherein the effective distance for wirelessly transmitting and receiving is adjusted by selecting from a list of distinct distances
First Claim
1. A portable file server configured to wirelessly transmit and receive data to and from a terminal, the portable file server comprising:
- a radio field intensity input unit configured to receive through an antenna an input identifying a distance indicating a radio field intensity value from a user interface displayed by the terminal;
the antenna configured to wirelessly transmit and receive the data within a radio field that is in accordance with a radio field intensity determined by a signal current amount controlled by a current controller; and
the current controller configured to increase or decrease the signal current amount for the data in accordance with the radio field intensity value,wherein the user interface presents a list of distinct distances corresponding to a plurality of predetermined field intensities, the input identifies the distance from the list of distinct distances, and the radio field intensity value indicated by the distance is one of the plurality of predetermined field intensities,wherein each distance represents an effective distance of the radio field for wirelessly transmitting and receiving data to and from the terminal,wherein the radio field intensity input unit receives the input from the terminal if a password received from the terminal matches a password stored in the portable file server, andwherein the radio filed intensity value is selectable by both the portable file server and through the user interface displayed by the terminal when the password received from the terminal matches the password stored in the portable file server.
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Accused Products
Abstract
A portable file server includes a radio field intensity input unit, a current controller, and an antenna. A radio field intensity for use in wireless communication between the portable file server and a terminal through the antenna is inputted to the radio field intensity input unit. The current controller increases or decreases the amount of signal current for data to be transmitted to the terminal in accordance with the radio field intensity inputted to the radio field intensity input unit. The signal current is, in turn, outputted to the antenna. Thus, the radio field intensity is controlled such that the radio waves can be received only in the area where wireless communication between the portable file server and the terminal takes place; thus, unauthorized wireless access from outside of this area will be prevented. Hence, the portable file server provides enhanced security.
60 Citations
10 Claims
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1. A portable file server configured to wirelessly transmit and receive data to and from a terminal, the portable file server comprising:
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a radio field intensity input unit configured to receive through an antenna an input identifying a distance indicating a radio field intensity value from a user interface displayed by the terminal; the antenna configured to wirelessly transmit and receive the data within a radio field that is in accordance with a radio field intensity determined by a signal current amount controlled by a current controller; and the current controller configured to increase or decrease the signal current amount for the data in accordance with the radio field intensity value, wherein the user interface presents a list of distinct distances corresponding to a plurality of predetermined field intensities, the input identifies the distance from the list of distinct distances, and the radio field intensity value indicated by the distance is one of the plurality of predetermined field intensities, wherein each distance represents an effective distance of the radio field for wirelessly transmitting and receiving data to and from the terminal, wherein the radio field intensity input unit receives the input from the terminal if a password received from the terminal matches a password stored in the portable file server, and wherein the radio filed intensity value is selectable by both the portable file server and through the user interface displayed by the terminal when the password received from the terminal matches the password stored in the portable file server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification