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:
Jul. 27, 1999
Filed:
Mar. 28, 1997
Daniel H Greene, Sunnyvale, CA (US);
Alan G Bell, Palo Alto, CA (US);
Joseph B Lyles, Mountain View, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A self-arbitrating and self-routing ATM (Asynchronous Transfer Mode) switch has a switching fabric consisting of rows and columns of logic groups. The rows of logic groups have addressing logic for routing data packets received at input ports to the columns of logic groups. Arbitration logic in each of the columns of logic groups route data packets received from the addressing logic to their specified output ports. The arbitration logic forming each column of logic groups resolves conflicts between data packets contending for an identical output port. Additional logic in each column of logic groups signals input ports when data packets are successfully received by their specified output ports. Data packets which lose arbitration during a switch cycle are assigned a higher priority and retransmitted to the switching fabric during the next switch cycle.