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. 17, 2001
Filed:
Feb. 17, 1999
Koichi Funaya, Tokyo, JP;
Satoru Kaneda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A bus switch for realizing bus transaction across two or more buses comprises N (N: integer larger than 1) bus bridges, a switch module and a scheduler. When a transaction cell is generated by a bus bridge, the bus bridge adds a destination port number to the header of the transaction cell. The destination port number designates one of output ports of the switch module to which the transaction cell should be transferred. When the transaction cell is supplied to an input port of the switch module, an output port multiplexer of the switch module is controlled by the destination port number in the transaction cell, and the transaction cell is transferred to one of the output ports that corresponds to the destination port number, thereby the transaction cell is transferred to a destination bus bridge. By the addition of the destination port number, the scheduler does not have to directly control connection of a transfer path in the switch module. Therefore, the scheduler and the switch module do not have to be connected together via lines, and thus the scheduler and the switch module can be formed in separate and independent two LSIs. Consequently, the number of buses connected to the bus switch can be increased easier in comparison with conventional bus switches.