Information processing apparatus for receiving predetermined information, and program product and method therefor

• US 20050225437A1
• Filed: 08/19/2004
• Published: 10/13/2005
• Est. Priority Date: 04/13/2004
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yamada, Isamu, Shiotsu, Shinichi, Ninomiya, Teruhisa
• Application Number:
  US10/921,262
• Publication Number:
  US 20050225437A1
• Time in Patent Office: Days
• US Class Current: 340/10.510
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10039 interrogator driven, i.e. synchronous
• CPC Class Codes: G06K 7/10079 the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
• CPC Class Codes: G06K 7/10128 the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
• CPC Class Codes: G06K 7/10217 parameter settings controlling the transmission power of the interrogator

Abstract

An information processing apparatus communicates with a separate passive device, to receive specific information from the separate device. The information processing apparatus includes an antenna, a transmitter and a receiver both coupled to the antenna, and a control unit for controlling the transmitter. The control unit causes the transmitter to transmit a signal at a low transmission power and waits for reception by the receiver of a response signal from the separate device. When the specific information is detected in the response signal, the control unit causes the transmitter to transmit a signal at a high transmission power by raising the transmission power of the transmitter, to thereby enable information to be read from or written to the separate device.

Claims

1. An information processing apparatus for communicating with a separate passive device, to receive specific information from the separate device, said information processing apparatus comprising an antenna, a transmitter and a receiver both coupled to said antenna, and a control unit for controlling said transmitter, wherein

said control unit causes said transmitter to transmit a signal at a low transmission power and waits for reception by said receiver of a response signal from the separate device, and

when the specific information is detected in the response signal, said control unit causes said transmitter to transmit a signal at a high transmission power by raising the transmission power of said transmitter, to thereby enable information to be read from or written to the separate device.

2. The information processing apparatus according to claim 1, wherein the separate device is a contactless IC card or an RF ID tag.

3. The information processing apparatus according to claim 1, wherein the control unit sets a transmission interval of the signal transmitted at the low transmission power to a first predetermined value until the specific information is detected in the response signal, and wherein said control unit sets a transmission interval of the signal transmitted at the high transmission power to a second predetermined value which is shorter than the first predetermined value.

4. The information processing apparatus according to claim 1, wherein the separate device is a contactless IC card or an RF ID tag, and wherein said control unit causes said transmitter to transmit a signal for a contactless IC card and a signal for an RF ID tag alternately at the low transmission power.

5. The information processing apparatus according to claim 1, wherein

said control unit causes said transmitter to transmit a signal for a contactless IC card at the low transmission power, and

when first identification information is detected in the response signal from the separate device received by said receiver, said control unit causes said transmitter to transmit a signal at the high transmission power to detect first particular information, and wherein

said control unit then causes said transmitter to transmit a signal for an RF ID tag at the low transmission power, and

when second identification information is detected in the response signal from the separate device received by said receiver, the control unit causes said transmitter to transmit a signal at the high transmission power to detect second particular information.

6. The information processing apparatus according to claim 1, further comprising a display unit for displaying a screen of instructing a user to place the separate device closer to said receiver of said information processing apparatus, and for displaying information received from the separate device.

7. A program product stored on a storage medium for use in an information processing apparatus which comprises a transmitter and a receiver and which is capable of communicating with a separate passive device, and for receiving specific information from the separate device, said program product being operable to effect the steps of:

causing the transmitter to transmit a signal at a low transmission power and waiting for reception by the receiver of a response signal from the separate device; and

causing the transmitter to transmit a signal at a high transmission power by increasing the transmission power of the transmitter when specific information is detected in the response signal, to thereby enable information to be read from or written to the separate device.

8. In an information processing apparatus which comprises a transmitter and a receiver and which is capable of communicating with a separate passive device, a method for receiving specific information from the separate device, said method comprising:

causing the transmitter to transmit a signal at a low transmission power and waiting for reception by the receiver of a response signal from the separate device; and

causing the transmitter to transmit a signal at a high transmission power by increasing the transmission power of the transmitter when specific information is detected in the response signal, to thereby enable information to be read from or written to the separate device.