Implementing cable modem functions on a host computer

• US 6,886,180 B1
• Filed: 08/16/2000
• Issued: 04/26/2005
• Est. Priority Date: 08/16/2000
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Sandberg, Jabe A., Loukianov, Dmitrii
• Primary Examiner(s): Miller, John
• Application Number:
  US09/640,480
• Time in Patent Office: 1,714 Days
• Field of Search: 725/111, 725/109, 725/51, 370/401, 370/469, 370419-421, 370/428, 370486-490, 370/89
• US Class Current: 725/111
• CPC Class Codes: H04N 21/42676 for modulating an analogue carrier signal to encode digital information or demodulating it to decode digital information, e.g. ADSL or cable modem
• CPC Class Codes: H04N 21/6168 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications

Abstract

The present invention processes cable modem functions on a host computer. The cable modem receives hardware specific modem functions and transfers these functions to the host computer. An abstraction layer in the host computer receives the functions and converts the functions to/from hardware specific functions. The abstraction layer may be a DOCSIS abstraction layer. A firmware emulator (firmulator) then receives and processes the modem functions. The firmware emulator includes a plurality of state machines and networking protocol agents.

Claims

1. A method of implementing cable modem functions on a host computer comprising:

receiving information which may include cable modem data and cable modem commands at the cable modem;

transferring at least a portion of the information to the host computer;

performing functions corresponding to any transferred cable modem commands on the host computer into first results;

processing any transferred cable modem data on the host computer into second results;

translating the first results into hardware specific functions;

translating the second results into hardware specific data;

executing the hardware specific functions; and

transferring the hardware specific data;

wherein the cable modem functions are performed in a firmware emulator that emulates cable modem firmware that performs the cable modem functions.

2. The method of claim 1, wherein the host computer includes a cable modem abstraction layer.

3. The method of claim 2, wherein the translating is performed in by the abstraction layer.

4. The method of claim 2, wherein the abstraction layer is a DOCSIS abstraction layer.

5. The method of claim 1, wherein the modem functions performed on the host computer may be hardware independent.

6. A modem function processor comprising:

an abstraction layer which translates modem functions to and from hardware-specific functions; and

a firmware emulator that emulates cable modem firmware that performs the modem function and which performs hardware independent functions.

7. The modem function processor claim 6, wherein the abstraction layer sends or receives modern commands and/or data to or from a cable modem.

8. The modem function processor claim 6, wherein the abstraction layer is a DOCSIS abstraction layer.

9. The modem function processor claim 6, wherein the firmware emulator includes a plurality of state machines and states within the state machines.

10. The modem function processor claim 9, wherein the plurality of state machines performs the cable modem functions.

11. The modem function processor claim 6, further comprising an interface to a cable modem.

12. The modem function processor claim 11, wherein the interface may include one or more intermediate software driver interface layers, such as a transport driver interface.

13. The modem function processor claim 11, wherein the interface is a direct interface.

14. A method of performing modern functions comprising:

receiving the modem commands and/or data; and

distributing the modem commands and/or data among a plurality of state machines that perform respective state machine functions; and

processing the state machine functions by the plurality of state machines on a host computer.

15. The method of claim 14, wherein the conversion is performed by an abstraction layer which converts between hardware specific functions and hardware independent functions.

16. The method of claim 14, wherein the modern functions art cable modem functions.

17. The method of claim 14, wherein the processing uses resources of the host computer.