Dual-channel communications protocol providing enhanced capabilities for modems

• US 6,768,749 B1
• Filed: 10/14/1999
• Issued: 07/27/2004
• Est. Priority Date: 10/14/1999
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Riley, Kevin, Osler, Bruce P.
• Primary Examiner(s): QURESHI, AFSAR M
• Application Number:
  US09/417,685
• Time in Patent Office: 1,748 Days
• Field of Search: 370/264, 370/359, 370/437-439, 370/546, 370/524, 370/352, 370/445, 375/222, 380/266, 380/269, 380/33, 455/522, 709/227
• US Class Current: 370/524
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A system providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link. The dual-channel communications link includes a data channel used for sending and receiving data or code and a command channel for sending and receiving command and status information. Enhanced capabilities include providing that data on the data channel may be compressed using one of a plurality of compression algorithms, data may also be encrypted using one of a plurality of encryption algorithms. Additionally, LCP spoofing is provided as a way to reduce the time required to establish PPP links.

Claims

1. A system providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link comprising:

an initializer for disabling an existing communications protocol;

a detector for determining conditions allowing for the negotiation of the dual-channel communication protocol;

a channel builder for establishing the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

a negotiator for selecting a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the initializer, the detector, the channel builder and the negotiator, in total, complete their respective execution in a configureable and finite amount of time and wherein the conditions include error correction being enabled and data compression being disabled between the modems.

2. The system of claim 1 wherein the supplemental algorithm comprises at least one of:

a compression algorithm and an encryption algorithm.

3. The system of claim 2 wherein the compression algorithm is the Lempel-Ziv-Health compression algorithm.

4. A system providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link comprising:

an initializer for disabling an existing communications protocol;

a detector for determining conditions allowing for the negotiation of the dual-channel communication protocol;

a channel builder for establishing the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

a negotiator for selecting a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the initializer, the detector, the channel builder and the negotiator, in total, complete their respective execution in a configureable and finite amount of time;

wherein LCP parameter information is transmitted as part of establishing the data channel; and

the supplemental algorithm performs spoofing of the LCP negotiation process.

5. A system providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link comprising:

an initializer for disabling an existing communications protocol;

a detector for determining conditions allowing for the negotiation of the dual-channel communication protocol;

a channel builder for establishing the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

a negotiator for selecting a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the initializer, the detector, the channel builder and the negotiator, in total, complete their respective execution in a configureable and finite amount of time;

wherein the status information includes information on the communications link error rate and the communications link throughput level.

6. A method of providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link comprising the steps of:

(a) disabling an existing communications protocol;

(b) determining conditions allowing for the negotiation of the dual-channel communication protocol;

(c) establishing the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

(d) selecting a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the disabling step, the determining step, the establishing step and the selecting step, in total, complete their respective execution in a configureable and finite amount of time and wherein the conditions include error correction being enabled and data compression being disabled between the modems.

7. The method of claim 6 wherein the supplemental algorithm comprises at least one of:

a compression algorithm and an encryption algorithm.

8. The method of claim 7 wherein the compression algorithm is the Lempel-Ziv-Health compression algorithm.

9. A method of providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link comprising the steps of:

(a) disabling an existing communications protocol;

(b) determining conditions allowing for the negotiation of the dual-channel communication protocol;

(c) establishing the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

(d) selecting a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the disabling step, the determining step, the establishing step and the selecting step, in total, complete their respective execution in a configureable and finite amount of time;

wherein LCP parameter information is transmitted as part of establishing the data channel; and

the supplemental algorithm performs spoofing of the LCP negotiation process.

10. A method of providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link comprising the steps of:

(a) disabling an existing communications protocol;

(b) determining conditions allowing for the negotiation of the dual-channel communication protocol;

(c) establishing the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

(d) selecting a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the disabling step, the determining step, the establishing step and the selecting step, in total, complete their respective execution in a configureable and finite amount of time;

wherein the status information includes information on the communications link error rate and the communications link throughput level.

11. A computer program product comprising:

a computer usable medium for providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link;

a set of computer program instructions embodied on the computer usable medium, including instructions to;

disable an existing communications protocol;

determine conditions allowing for the negotiation of the dual-channel communication protocol;

establish the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

select a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the instructions to disable, determine, establish and select, in total,

complete their respective execution in a configureable and finite amount of time and wherein the conditions include error correction being enabled and data compression being disabled between the modems.

12. The computer program product of claim 11 wherein the supplemental algorithm comprises at least one of:

a compression algorithm and an encryption algorithm.

13. The system of claim 12 wherein the compression algorithm is the Lempel-Ziv-Health compression algorithm.

14. A computer program product comprising:

a computer usable medium for providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link;

a set of computer program instructions embodied on the computer usable medium, including instructions to;

disable an existing communications protocol;

determine conditions allowing for the negotiation of the dual-channel communication protocol;

establish the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

select a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the instructions to disable, determine, establish and select, in total,

complete their respective execution in a configureable and finite amount of time;

wherein LCP parameter information is transmitted as part of establishing the data channel; and

the supplemental algorithm performs spoofing of the LCP negotiation process.

15. A computer program product comprising:

a computer usable medium for providing a framework for the negotiation of a dual-channel communication protocol between modems connected by a communications link;

a set of computer program instructions embodied on the computer usable medium, including instructions to;

disable an existing communications protocol;

determine conditions allowing for the negotiation of the dual-channel communication protocol;

establish the dual-channel communications protocol comprising;

a data channel of the dual-channel communications protocol enabled for sending and receiving data; and

a command channel of the dual-channel communications protocol enabled for channel command and status information; and

select a supplemental algorithm for running on the data channel from a plurality of algorithms;

wherein the instructions to disable, determine, establish and select, in total,

complete their respective execution in a configureable and finite amount of time;

wherein the status information includes information on the communications link error rate and the communications link throughput level.