Destination address detection apparatus for hardware packet router

• US 5,790,542 A
• Filed: 06/27/1996
• Issued: 08/04/1998
• Est. Priority Date: 06/28/1995
• Status: Expired due to Fees

• Current Assignee: Utstarcom Korea Limited
• Original Assignee: SK Hynix Inc.
• Inventors: Kim, June-Man, Lee, Seung-Hwan
• Primary Examiner(s): Safourek, Benedict V.
• Assistant Examiner(s): VANDERPUYE, KENNETH N
• Application Number:
  US08/671,245
• Time in Patent Office: 768 Days
• Field of Search: 370/351, 370/401, 370/355, 370/356, 370/379, 370/389, 370/392, 370/397, 370/409, 370/510, 370/412, 364/715.11
• US Class Current: 370/392
• CPC Class Codes: H04L 49/90 Buffering arrangements

Abstract

An improved destination address detection apparatus for a hardware packet router capable of detecting the address of the destination to which the packet data is transmitted, not using the central processing unit, which includes a serial/parallel converter for converting a serial packet data inputted thereto into a parallel packet data; a buffer for storing the parallel packet data outputted from the serial/parallel converter therein and for outputting in a first-in-first-out method; an address detector for detecting an address of a destination, to which the address is transmitted, from the parallel packet data outputted from the buffer; and an "n" number of buffers, which are activated in accordance with an address of the destination detected by the address detector, for storing the packet data and for outputting in a first-in-first-out method, wherein said address detector includes an "n" number of latches, which are connected in series, for sequentially shifting the output signals of the buffer and for storing and outputting; and a decoding latch for storing and decoding the output signal of the latches, generating an "n" number of chip enable signals in accordance with an address of the destination when the address of the destination is stored, and selectively enabling the buffers.

Claims

1. A destination address detection apparatus for a hardware packet router, comprising:

a serial/parallel converter for converting a serial packet data inputted thereto into a parallel packet data;

a buffer for storing the parallel packet data outputted from the serial/parallel converter therein and for outputting in a first-in-first-out method;

an address detector for detecting an address of a destination to which the parallel packet data is transmitted, from the parallel packet data outputted from the buffer; and

an "n" number of buffers which are activated in accordance with an address of the destination detected by the address detector for storing the packet data and for outputting in a first-in-first-out method, said address detector comprising;

an "n" number of latches, which are connected in series, for sequentially shifting the output signals of the buffer and for storing and outputting; and

a decoding latch for storing and decoding the output signal of the latches, generating an "n" number of chip enable signals in accordance with an address of the destination when the address of the destination is stored, and selectively enabling the buffers.

2. A destination address detection apparatus in accordance with claim 1 wherein said decoding latch comprises means for decoding the packet data stored in each latch.

3. A destination address detection apparatus in accordance with claim 1 wherein said address detection apparatus is operatively connected-to a central processing means and comprises means for directly transmitting the packet data to the destination detected by the address detector without said central processing means.