System and method for establishing link layer parameters based on physical layer modulation

• US 5,852,631 A
• Filed: 01/08/1997
• Issued: 12/22/1998
• Est. Priority Date: 06/21/1996
• Status: Expired due to Term

• Current Assignee: Rembrandt Technologies, LP (Rembrandt IP Management, LLC)
• Original Assignee: Paradyne Corporation (Dasan Networks Incorporated)
• Inventors: Scott, Robert Earl
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): GLUCK, JEFFREY WILLIAM
• Application Number:
  US08/780,762
• Time in Patent Office: 713 Days
• Field of Search: 375/222, 375/223, 379/93.29, 379/93.31, 379/93.32, 379/93.33, 379/120, 370/252
• US Class Current: 375/222
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 88/184 Messaging devices, e.g. message centre
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

A system and method for establishing a link layer connection between a calling modem having a plurality of possible first physical layer modulations and one or more possible link layer connections and an answering modem having a plurality of possible second physical layer modulations and one or more possible link layer connections comprising the steps of establishing a physical layer connection between the calling and the answering modems, wherein the physical layer connection is based on a negotiated physical layer modulation chosen from the first and second physical layer modulations, and establishing link layer connection based upon said negotiated physical layer modulation. The link layer connection includes parameters that are preset to default values based upon the negotiated physical layer connection. Thus, the modems are able to avoid the link layer negotiation, thereby providing a faster and more robust connection.

Claims

1. A method for establishing a link layer connection between a calling modem having a plurality of possible first physical layer modulations and a plurality of possible link layer connections and an answering modem having a plurality of possible second physical layer modulations and a plurality of possible second link layer connections, comprising the steps of:

establishing a physical layer connection between said calling and said answering modems, wherein said physical layer connection is based on a negotiated physical layer modulation chosen from said first and second physical layer modulations; and

establishing said link layer connection based upon said negotiated physical layer modulation.

2. The method of claim 1, wherein said negotiated physical layer modulation is a fast connect modem modulation.

3. The method of claim 1, wherein said link layer connection is an error-correcting protocol.

4. The method of claim 1, further comprising the step of presetting link layer parameters of said link layer connection to default settings based on said negotiated physical layer modulation.

5. The method of claim 3, wherein said error-correcting protocol includes parameters that are set to pre-defined settings based on said negotiated physical layer modulation.

6. A system for establishing a link layer connection between a calling modem having a plurality of possible first physical layer modulations and a plurality of possible link layer connections and a answering modem having a plurality of possible second physical layer modulations and a plurality of possible second link layer connections, comprising:

means for establishing a physical layer connection between said calling and said answering modems, wherein said physical layer connection is based on a negotiated physical layer modulation chosen from said first and second physical layer modulations; and

means for establishing said link layer connection based upon said negotiated physical layer modulation.

7. The system of claim 6, wherein said negotiated physical layer modulation is a fast connect modem modulation.

8. The system of claim 6, wherein said link layer connection is an error-correcting protocol.

9. The system of claim 6, further comprising means for presetting link layer parameters of said link layer connection to pre-defined settings based on said negotiated physical layer modulation.

10. A computer program product having a computer readable medium including computer program logic recorded thereon for use in a calling modem for establishing a link layer convention between said calling modem having a plurality of possible first physical layer modulations and a plurality of possible link layer connections and an answering modem having a plurality of possible second physical layer modulations and a plurality of possible second link layer connections, comprising:

logic for establishing a physical layer connection between said calling and said answering modems, wherein said physical layer connection is based on a negotiated physical layer modulation chosen from said first and second physical layer modulations; and

logic for establishing link layer connection based upon said negotiated physical layer modulation.