Communication architecture for high speed networking

• US 5,115,432 A
• Filed: 12/12/1989
• Issued: 05/19/1992
• Est. Priority Date: 12/12/1989
• Status: Expired due to Fees

• Current Assignee: American Telephone & Telegraph Company (AT&T, Inc.), Bell Telephone Laboratories, Inc. (Nokia Corporation)
• Original Assignee: AT&T, Inc.
• Inventors: Haas, Zygmunt
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Jung, Min
• Application Number:
  US07/449,201
• Time in Patent Office: 889 Days
• Field of Search: 370/94.1, 370/60, 364/200, 364/900, 395/725, 395/325
• US Class Current: 370/469
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 69/326 in the transport layer [OSI layer 4] H04L69/16 takes precedence
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A new data communications architecture is disclosed in which high level communications services provided to a host processor are arranged into independent horizontal functions that are processed in parallel. Any conditional dependencies among the horizontal functions are resolved by a connector that interfaces the horizontal functions to an application layer of the host processor. Additionally, communication performance is enhanced by allowing adaptive specifications of a high-level protocol employed in the architecture for providing the high-level services. This adaptive specification may be initiated in response to changing user requirements or varying network parameters. Then, a high-level protocol specification is obtained by choosing appropriate values for parameters of the horizontal functions which are parametrically programmable.

Claims

1. Apparatus for providing high-level non-application layer services between low-level services interfacing a network and application layer services of a host processor, the apparatus being characterized by:

a plurality of independent parallel horizontally oriented function means for providing a plurality of high-level communication services;

means for interfacing said plurality of parallel horizontally oriented function means to said low-level services; and

means for interfacing said plurality of parallel horizontally oriented function means to said application layer services, said means for interfacing to said application layer includes means for resolving dependencies among said plurality of parallel horizontally oriented function means.

2. The apparatus as defined in claim 1 wherein each of said plurality of parallel horizontally oriented function means includes means for receiving and responding to parametric programming.

3. The invention as defined in claim 1 further including means for adaptively specifying as actual high-level protocol to be used in communication between said high-level service means of said host processor and a high-level services providing means of another host processor attached to said network.

4. The invention as defined in claim 3 wherein said means for adaptively specifying said actual high-level protocol to be used determines the actual protocol in response to a determination of changed user requirements.

5. The invention as defined in claim 4 wherein said means for adaptively specifying said actual high-level protocol to be used determines the actual protocol in response to a determination of variations in network transmission conditions.

6. The invention as defined in claim 3 further including means for communicating a specification of said specified protocol between said high-level service means of said host processor and a high-level services providing means of another host processor in said network.

7. The invention as defined in claim 3 further including means for generating and transmitting special packets containing a representation of a specification of a section of said specified protocol and means for interfacing said special packets to said network.

8. The invention as defined in claim 3 further including means for generating one or more special option fields to be included in a header of a packet, said one or more special option fields containing a representation of a specification of a section of said specified protocol is represented and means for inserting said generated option fields into said packet header.

9. The invention as defined in claim 3 wherein each of said plurality of parallel horizontally oriented function means includes means for receiving and responding to parametric programming and said means for adaptively specifying said actual high-level protocol to be used includes means for choosing values of parameters to be used by said independent horizontal functions.

10. The invention as defined in claim 9 further including means for receiving special packets wherein a specification of a section of said specified protocol is represented and means for changing values of parameters used by said independent horizontal functions in response to said received representation.