Internet and related networks, a method of and system for substitute use of checksum field space in information processing datagram headers for obviating processing speed and addressing space limitations and providing other features

• US 6,330,614 B1
• Filed: 03/20/1998
• Issued: 12/11/2001
• Est. Priority Date: 03/20/1998
• Status: Expired due to Fees

• Current Assignee: Nexabit Networks LLC
• Original Assignee: Nexabit Networks LLC
• Inventors: Young, Christopher R., Aggarwal, Vijay K., Shah, Himanshu C.
• Primary Examiner(s): Rinehart, Mark H.
• Assistant Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US09/044,999
• Time in Patent Office: 1,362 Days
• Field of Search: 709/236, 709/230, 709/227, 340/825.57, 340/825.53, 340/825.52, 370/470, 370/474, 370/471, 370/476, 370/229, 714/4, 710/9
• US Class Current: 709/236
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

In Internet and related networks, a method of and system for substitute use of the normal checksum field space in information processing (IP) datagram headers for obviating current processing time and addressing space limitations, involving replacing the current checksum usage in the checksum field with its attendant processing time with further source host and destination host addresses of lesser processing time, thereby increasing the address space for the network and decreasing the require header processing time, and/or providing space for autonomous system numbers, a higher layer protocol-based routing information (including of the MPLS type) or for Virtual Private Networks Indentifiers in the header.

Claims

1. In a network system for exchanging information between two or more computer hosts connected to the system with the aid of datagram headers of predetermined size for routing and forwarding the information, with the headers containing source and destination network address fields and other service and identification fields, including a checksum field space originally intended for generating checksums guaranteeing the validity of the header, a method of extending the usefulness of the headers and providing a substitute use for the novel checksum field space) that comprises, eliminating the checksum functions normally performed at the nodes of the network system with their attendant checksum processing time and normally occupying said checksum field space in the header;

and substituting in the checksum field space one or more of further source host and destination host addresses of lesser processing time, autonomous system numbers, higher layer protocol-base routing information, Virtual Private Network identifiers, and MPLS protocols.

2. A method as claimed in claim 1 wherein bits normally required in said checksum field for generating checksums are distributed amongst network and host address fields of the header.

3. A method as claimed in claim 1 wherein the number of bits normally required in said checksum field for generating checksums are distributed to extend current network address bits and to provide host address bits in said space of the header.

4. A method as claimed in claim 3 wherein 8 bits are added to the network address field and 8 bits of the host address field are flowed into said space of the header.