Portable file server

• US 20040148515A1
• Filed: 12/11/2003
• Published: 07/29/2004
• Est. Priority Date: 12/13/2002
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kikuchi, Akihiro
• Granted Patent: US 8,612,554 B2
• Time in Patent Office: Days
• US Class Current: 713/200
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

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.

Claims

1. A portable file server for wirelessly transmitting and receiving data to/from a terminal, the portable file server comprising:

a radio field intensity input unit for inputting a radio field intensity;

an antenna; and

a current controller for increasing or decreasing the amount of signal current for the data in accordance with the radio field intensity, the data being outputted to the antenna.

2. A portable file server according to claim 1, wherein the radio field intensity input unit allows the radio field intensity to be inputted when a password transmitted from the terminal matches a password stored in the portable file server.

3. A portable file server according to claim 1, further comprising a wired data transmission and reception unit for transmitting and receiving the data over a wired network.

4. A portable file server for wirelessly transmitting and receiving data to/from a terminal, the portable file server comprising:

an antenna; and

a current controller for increasing and decreasing the amount of signal current for the data to be outputted to the antenna in accordance with a radio field intensity inputted from the terminal.

5. A portable file server for wirelessly transmitting and receiving data to/from a terminal, the portable file server comprising:

a receiver for receiving a radio field intensity inputted from the terminal;

an antenna;

a current controller for increasing or decreasing the amount of signal current for the data to be outputted to the antenna; and

a transmitter for transmitting the data stored in the portable file server to the terminal in accordance with the radio field intensity determined by the amount of signal current controlled by the current controller.