The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 2002
Filed:
Nov. 24, 1998
Subhash Bal, Calabasas, CA (US);
Raghunath Iyer, Los Altos, CA (US);
Sundar Iyer, Palo Alto, CA (US);
PMC-Sierra, Santa Clara, CA (US);
Abstract
A method and apparatus for performing network address translation is disclosed. The method generates statistically unique port number for each outgoing connection. The statistically unique port numbers are formed from a subset of bits from the source node's IP address and a subset of bits from the port number assigned by the source node. The statistically unique port number is used as an index into a table containing connection information. When a statistically unique port number fails to be absolutely unique, the method uses a secondary fallback system that generates a unique port number by using sequential numbering system. The information about the connections using unique port numbers that were generated sequentially is stored in a secondary connection table. The secondary connection table is organized as a Patricia tree.