Wireless communication apparatus, wireless communication method and wireless communication media

• US 20050090281A1
• Filed: 10/01/2004
• Published: 04/28/2005
• Est. Priority Date: 10/03/2003
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Onodera, Shin
• Granted Patent: US 7,200,361 B2
• Time in Patent Office: Days
• US Class Current: 455/550.1
• 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 7/10346 the antenna being of the far field type, e.g. HF types or dipoles

Abstract

A wireless communication apparatus includes a transmitter to transmit a response request signal, a receiver to receives a response transmitted from a wireless communication medium in response to the response request signal, a level detector to detect a response receiving signal level, a memory to store threshold signal level of receiving signal of each type of medium; and a controller to set up a threshold signal level enabling the data writing to a medium to which a response is transmitted based on medium type data included in a response and a threshold signal level of a receiving signal of each type of stored medium, and starts the data writing to a medium to which a response is transmitted when a response receiving signal level is above the threshold signal level.

Claims

1. A wireless communication apparatus for wireless communication with wireless communication media, comprising:

transmitting means for transmitting a response requesting signal to a wireless communication medium;

receiving means for receiving a response transmitted from the wireless communication medium in response to the response requesting signal transmitted by the transmitting means, the response including medium type data showing type of wireless communication media;

detecting means for detecting a signal level of the response;

storage means for storing plural threshold signal levels of receiving signals for each type of media correlated with the medium type data showing type of wireless communication media;

reading means for reading the threshold signal level from the storage means based on the medium type data included in the response received by the receiving means;

comparing means for comparing the signal level of the response detected by the detecting means with the threshold signal level read by the reading means; and

control means for starting the writing of specified data to the wireless communication medium to which the response is transmitted when the receiving signal level is larger than the threshold signal level by the comparing means.

2. The wireless communication apparatus as set force in claim 1, wherein the control means transmits the response request signal again by the transmitting means without starting the writing the specified data to the wireless communication medium when the response received signal level is below the threshold signal level compared by the comparing means, and starts the writing of the specified data to the wireless communication medium to which the response is transmitted when the received signal level received again by the receiving is determined to be larger than the threshold signal level by the comparing means.

3. The wireless communication apparatus as set force in claim 1, wherein the medium type data includes a name of maker who produced wireless communication media.

4. A wireless communication method applicable to the wireless communication with wireless communication media comprising:

transmitting a response requesting signal to a wireless communication medium for requesting a response including medium type data showing type of wireless communication media;

receiving a response transmitted from the wireless communication medium in response to the response requesting signal;

detecting the response receiving signal level;

storing plural threshold signal levels of receiving signals for each type of media correlated with the medium type data showing type of wireless communication media in a storage means;

reading the threshold signal levels from the storage means based on the medium type data showing type of wireless communication media included in the response;

comparing the response receiving signal level with the threshold signal level; and

starting the writing of specified data to the wireless communication medium to which the response is transmitted when the receiving signal level is larger than the threshold signal level determined by the comparison.

5. The wireless communication method as set force in claim 4, wherein when the response receiving signal level is decided to be smaller than the threshold signal level by the comparison in the comparing step, the writing process is not started but the response request signal is transmitted again and when the receiving signal level of the response received again is decided to be larger than the threshold signal level in the comparing step, specified data writing to the wireless communication medium to which the response is transmitted is started.

6. A wireless communication medium capable of wireless communication with the wireless communication apparatus, comprising:

storage means for storing medium type data showing type of this medium;

receiving means for receiving a response request signal to request a response transmitted from the wireless communication apparatus; and

transmitting means for transmitting a response including the medium type data stored in the storage means to the wireless communication apparatus in response to the response request signal.

7. The wireless communication medium as set force in claim 6, wherein the medium type data includes a name of maker who manufactured wireless communication media.