Data communication equipment

• US 20030228885A1
• Filed: 02/14/2003
• Published: 12/11/2003
• Est. Priority Date: 02/18/2002
• Status: Active Grant

• Current Assignee: Seiko Instruments Incorporated (Seiko Group)
• Original Assignee: Seiko Instruments Incorporated (Seiko Group)
• Inventors: Okamoto, Norihiro, Hattori, Osamu
• Granted Patent: US 7,089,038 B2
• Time in Patent Office: Days
• US Class Current: 455/556.1
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment

Abstract

To Provide a Data Communication Equipment that is characterized low power consumption and resistive to leakage of confidential information. The data communication system is consisted of the first communication equipment and the second communication equipment. The first communication equipment is consisted of a transceiver that sends a conditional signal and receives the reception if formation that the second communication equipment received the signal and a controlling algorism that commands the transceiver to reduce its transmitting power either until when the transceiver receives the information that the reception condition is poor for the second communication equipment or until when the transceiver receives no more signal from the second communication equipment. The second communication equipment has the features as the second reception method which is the reception of the conditional signals, and the second controlling method which is consisted of the evaluation of the quality of the signal and creation of the reception information, and the second transmission method which is the transmission of the reception information to the first communication equipment.

Claims

1. A data communication equipment comprising:

a first communication equipment having a first transmitter for transmitting a conditional signal, a first receiver for receiving a receiving information that other part received the conditional signal or not, and a first controller for controlling the capability to reduces its transmitting power until either the first receiver receives the signal indicates the receiving condition is poor or the first receiver is unable to copy any signal in connection with the first transmitter and the first receiver ; and

a second communication equipment having a second receiver for receiving the conditional signal, a second controller for creating the receiving information based upon the judgment of validity of the conditional signal, and a second transmitter for transmitting the receiving information to the first communication equipment.

2. A data communication equipment according to claim 1,

wherein the second controller of the second communication equipment controls increasing sensitivity of the second communication equipment if and only if the second communication equipment received the receiving information which the second transmitter receiving condition is poor.

3. A data communication equipment according to claim 1,

wherein the first communication equipment has the first directional antenna and the second communication equipment has the second directional antenna, the first controller of the first communication equipment adjusts the transmitting direction as the condition which the receiving signal strength of the first receiver reaches maximal for the first receiver, and the second controller of the second communication equipment adjusts the transmitting direction as the condition which the receiving signal strength reaches maximal for the second receiver.

4. A data communication equipment according to claim 1, wherein the first transmitter has a compressor to produce compressed signals form uncompressed data, the second communication equipment has a decompressor to recover the data before compressing, the first transmitter sends the compressed data produced by the compressor and the second receiver receives the compressed signals.

5. A data communication equipment according to claim 1, wherein the first transmitter and the first receiver of the first communication equipment and the second transmitter and the second receiver of the second communication equipment communicate at the same frequency.

6. A data communication equipment according to claim 1,

wherein the second communication equipment refuses to receive an information from any other communication equipment rather than the first communication equipment while the first communication equipment and the second communication equipment are in communication or while the second communication equipment completes the copy of the one full screen of data.

7. A data communication equipment according to claim 1, further comprising:

a repeater system for receiving the conditional signal transmitted from the first transmitter, for transmitting the same conditional signal to the same frequency as the frequency the conditional signal is received toward the second receiver, for receiving the conditional signal transmitted from the second transmitter, and for transmitting the same conditional signal to the same frequency as the frequency the conditional signal is received toward the first receiver;

wherein the first receiver turns the function off of the repeater or ignore the signal from the repeater when the first receiver received the conditional signal transmitted by the first transmitter directly from the second transmitter but not by passing the repeater system.

8. A data communication equipment according to claim 1, wherein the data is any of video, picture and Figure.