Method of interfacing between data transmission systems having an unequal number of transceiver ports

• US 5,598,543 A
• Filed: 09/26/1994
• Issued: 01/28/1997
• Est. Priority Date: 09/26/1994
• Status: Expired due to Fees

• Current Assignee: World Cyberlinks Corporation
• Original Assignee: John Notarianni
• Inventors: Chan, Yuwa, Notarianni, John
• Primary Examiner(s): Harvey, Jack B.
• Assistant Examiner(s): Lefkowitz, Sumati
• Application Number:
  US08/313,857
• Time in Patent Office: 855 Days
• Field of Search: 395/200.01-200.21, 395/309
• US Class Current: 710/306
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices

Abstract

A method of interfacing between data transmission systems having an unequal number of transceiver ports includes generating an information signal within a first data transmission system and compressing the information signal to provide a data packet signal and a control packet signal which are transmitted to an interface mechanism. The interface mechanism decompresses the data packet signal and control packet signal to provide a data information signal and control information signal which are separated. The control information signal is then converted to a signal format which is compatible with the transceiver ports of the second data transmission system. Thereafter, both the data information signal and converted control information signal are provided to the transceiver input port of the second data transmission system.

Claims

1. A method of interfacing between a first data transmission system and a second data transmission system utilizing an interface mechanism, the first data transmission system having a first plurality of transceiver ports, the second data transmission system having a second plurality of transceiver ports, the method comprising the steps of:

a) generating an information signal including at least one of a data signal and a control signal within the first data transmission system, the data signal representing data to be provided by the first data transmission system, the control signal representing control commands to be provided by the first data transmission system for controlling communication between the interface mechanism and the second data transmission system;

b) compressing the at least one of a data signal and control signal within the first data transmission system to provide at least one of a data packet signal and control packet signal;

c) transmitting at least one of the data packet signal and the control packet signal to an interface mechanism;

d) decompressing the at least one of the data packet signal and control packet signal to provide at least one of a data information signal and a control information signal;

e) converting the at least one of a data information signal and control information signal to a format which is recognizable to the second data transmission system, the converted control information signal directly controlling communication between the interface mechanism and the second data transmission system; and

f) providing the at least one of a data information signal and control information signal to the second data transmission system.

2. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1 wherein step (b) further comprises:

setting a preferred data packet signal size for transmission;

providing a first data signal to a data packet signal buffer; and

determining whether the first data signal is at least equal to the preferred data packet signal size, and if so, proceeding to the compression step, the determination substantially increasing transmission efficiency of the data packet signal.

3. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 2 further comprising:

providing a second data signal for combination with the first data signal if the first data signal is not at least equal to the preferred data packet signal size, the first and second data signals representing the data packet signal, the provision of the second data signal substantially increasing transmission efficiency of the data packet signal.

4. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1 wherein step (b) further comprises:

setting a maximum time for a first data signal to remain in a data packet signal buffer;

providing a first data signal to the data packet signal buffer for temporary storage therein; and

determining whether the first data signal has been stored in the data packet signal buffer for the maximum time, and if so, proceeding to the compression step, the determination substantially increasing transmission efficiency of the data packet signal.

5. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 4 further comprising:

providing a second data signal for combination with the first data signal if the first data signal has not been stored in the data packet signal buffer for the maximum time, the first and second data signals representing the data packet signal, the provision of the second data signal substantially increasing transmission efficiency of the data packet signal.

6. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1 wherein prior to step (c), the method further comprising:

determining whether the interface mechanism is available to receive at least one of the data packet signal and the control packet signal.

7. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1 wherein the first data transmission system includes an opto-electronic device capable of at least transmission of opto-electronic signals, and wherein step (c) further comprises:

transmitting the at least one of a data packet signal and control packet signal from the first transmission system to the interface mechanism with the opto-electronic device.

8. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 7 wherein the interface mechanism includes an opto-electronic device capable of at least reception of opto-electronic signals, and wherein step (c) further comprises:

receiving the at least one of a data packet signal and control packet signal with the opto-electronic device of the interface mechanism.

9. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1 wherein step (c) further comprises:

providing a checksum signal from the first data transmission system to the interface mechanism, the checksum signal being indicative of the at least one of a data packet signal and control packet signal provided by the first data transmission system; and

comparing the checksum signal with the at least one of a data packet signal and control packet signal.

10. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 9, wherein if the checksum signal is not indicative of the at least one of a data packet signal and control packet signal provided by the first data transmission system, the method further comprising:

retransmitting the at least one of the data packet signal and the control packet signal to the interface mechanism.

11. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1, wherein prior to step (e), the method further comprising:

providing the at least one of the data packet signal and control packet signal to a data and control signal buffer for temporary storage therein.

12. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1, wherein step (f) further comprises:

providing the data information signal and control information signal in RS232-C format to the second data transmission system.

13. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 1 wherein the control commands are indicative of a status change in at least one of a plurality of status signals utilized by the format which is recognizable to the second data transmission system.

14. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 13 wherein the plurality of status signals utilized are representative of an RS232-C format and include carrier detect (CD), data terminal ready (DTR), signal ground (GND), data set ready (DSR), request to send (RTS), clear to send (CTS) and ring indicator/+5V (RI/+5V).

15. A method of interfacing between a first data transmission system and a second data transmission system, the method utilizing an interface mechanism, the first data transmission system having a first plurality of transceiver ports, the second data transmission system having a second plurality of transceiver ports, the method comprising the steps of:

a) providing an information signal from the second data transmission system to the interface mechanism, the information signal including at least one of a data information signal, a control information signal, and a line status signal, the data information signal representing data to be provided by the second data transmission system, the control information signal being indicative of a communication status between the interface mechanism and the second data transmission system, and the line status signal being indicative of a transmission error between the interface mechanism and the second data transmission system;

b) compressing the information signal to provide a information packet signal;

c) transmitting the information packet signal from the interface mechanism to the first data transmission system; and

d) decompressing the information packet signal to provide at least one of a data information signal, a control information signal and a line status signal.

16. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 15, the method further comprising:

providing the data information signal to a data buffer;

providing the control information signal to a modem status buffer; and

providing the line status signal to a line status buffer.

17. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 15, the method further comprising:

accessing at least one of the data information signal, control information signal and line status signal to read at least one of information and status contained therein.

18. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 15 wherein the interface mechanism includes an opto-electronic device capable of at least transmission of opto-electronic signals, and wherein step (c) further comprises:

transmitting the information packet signal from the interface mechanism to the first data transmission system with the opto-electronic device.

19. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 18 wherein the first data transmission system includes an opto-electronic device capable of at least reception of opto-electronic signals, and wherein step (c) further comprises:

receiving the information packet signal with the opto-electronic device of the first data transmission system.

20. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 15, wherein step (c) further comprises:

providing a checksum signal from the interface mechanism to the first data transmission system, the checksum signal being indicative of the information packet signal provided by the interface mechanism; and

comparing the checksum signal with the information packet signal.

21. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 20, wherein if the checksum signal is not indicative of the information packet signal, the method further comprising:

retransmitting the information packet signal to the first data transmission system.

22. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 15, wherein step (a) further comprises:

providing the information signal from the second data transmission system to the interface mechanism in RS232-C format.

23. A method of interfacing between a first data transmission system and a second data transmission system as defined by claim 15, wherein step (a) further comprises:

providing the information signal to an information signal buffer for temporary storage therein.