Exchange apparatus and method of the same

• US 6,118,783 A
• Filed: 06/26/1997
• Issued: 09/12/2000
• Est. Priority Date: 07/03/1996
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kunito, Yoshiyuki
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): LEE, CHI HO A
• Application Number:
  US08/883,358
• Time in Patent Office: 1,174 Days
• Field of Search: 370/395, 370/396, 370/398, 370/399, 370/409, 370/397, 370/392, 370/393, 370/413, 370/419, 370/389
• US Class Current: 370/399
• CPC Class Codes: H04L 2012/568 Load balancing, smoothing or shaping
• CPC Class Codes: H04L 49/10 characterised by the switching fabric construction
• CPC Class Codes: H04L 49/111 Switch interfaces, e.g. port details
• CPC Class Codes: H04L 49/254 Centralised controller, i.e. arbitration or scheduling
• CPC Class Codes: H04L 49/30 Peripheral units, e.g. input or output ports
• CPC Class Codes: H04L 49/3009 Header conversion, routing tables or routing tags
• CPC Class Codes: H04L 49/3081 ATM peripheral units, e.g. policing, insertion or extraction
• CPC Class Codes: H04L 49/50 Overload detection or protection within a single switching element

Abstract

An exchange apparatus for exchanging packets based on a predetermined exchange system, including a plurality of input ports into which the packets are input, an input port identifier adding circuit for adding to a header region of each of the packets an input port identifier indicating the input port from which the packet was input, an output port identifier adding circuit for routing each of the packets to an output port and adding an output port identifier indicating the routed output port to each of the packets based on address information included in the header region and the input port identifier, and a packet exchanging circuit for exchanging the packets and outputting the same from the routed output port based on the added output port identifier.

Claims

1. An exchange apparatus for exchanging a plurality of packets, each of said plurality of packets having a header region including address data, based on a predetermined exchange system, comprising:

a plurality of input ports into which said plurality of packets are input, said plurality of input ports adding to said header region of each of said plurality of packets an input port identifier indicating a specific one of said plurality of input ports into which a corresponding one of said plurality of packets was input;

translating means connected to said plurality of input ports for translating said address data included in said header region of said plurality of packets based on a table stored in a single memory, said table including a relation between a set of said input port identifier and said address data and a set of said address data and an output port identifier identifying one of a plurality of output ports; and

packet exchanging means connected to said translating means for exchanging said plurality of packets and for outputting said plurality of packets from said one of said plurality of output ports to which was routed said plurality of packets based on said output port identifier translated by said translating means,

wherein said address data includes a virtual path identifier and a virtual channel identifier and said output port identifier includes a new virtual path identifier and a new virtual channel identifier.

2. The exchange apparatus as set forth in claim 1, further comprising:

a translation memory provided common to said plurality of input ports, wherein said translation memory is used for routing each of said plurality of packets input into said plurality of input ports.

3. The exchange apparatus as set forth in claim 1, wherein said input port identifier is used for identification of one of said plurality of input ports when said output port identifier adding means performs said routing of said plurality of packets.

4. The exchange apparatus as set forth in claim 1, wherein said output port identifier adding means includes a translation memory common to the plurality of input ports and said translation memory identifies one of said plurality of input ports into which one of said plurality of packets was input using an input port identifier added by said input port identifier adding means and performs routing by searching through a table and translating based on said address included in said header of said one of said plurality of packets to generate said output port identifier designating one of said plurality of output ports for outputting said one of said plurality of packets.

5. The exchange apparatus as set forth in claim 1, wherein said predetermined exchange system is an asynchronous transfer mode system and each of said plurality of packets is an asynchronous transfer mode cell.

6. An exchange method for exchanging a plurality of packets, each of said plurality of packets having a header region including address data, based on a predetermined exchange system, comprising the steps of:

inputting said plurality of packets into a plurality of input ports;

adding to said header region of each of said plurality of packets an input port identifier indicating a specific one of said plurality of input ports into which a corresponding one of said plurality of packets was input;

translating said address data included in said header region of said plurality of packets based on a table stored in a single memory, said table including a relation between a set of said input port identifier and said address data and a set of said address data and an output port identifier identifying one of a plurality of output ports; and

exchanging said plurality of packets and outputting said plurality of packets from said one of said plurality of output ports to which were routed said plurality of packets based on said output port identifier translated by said step of translating,

wherein said address data includes a virtual path identifier and a virtual channel identifier and said output port identifier includes a new virtual path identifier and a new virtual channel identifier.

7. The exchange method as set forth in claim 6, further comprising the step of:

using a translation memory provided common to said plurality of input ports when routing each of the plurality of packets input into said plurality of input ports.

8. The exchange method as set forth in claim 6, further comprising the step of:

using said input port identifier for identification of one of said plurality of input ports in the routing of said plurality of packets when adding said output port identifier.

9. The exchange method as set forth in claim 6, further comprising the step of:

using a translation memory common to the plurality of input ports, wherein

said translation memory identifies one of said plurality of input ports into which one of a plurality of packets was input using said input port identifier and performs routing by searching through a table and translating based on said address included in said header region of said one of said plurality of packets to generate said output port identifier designating one of said plurality of output ports for outputting said one of said plurality of packets.

10. The exchange method as set forth in claim 6, wherein said predetermined exchange system is an asynchronous transfer mode system and said step of inputting includes forming each of said plurality of packets an asynchronous transfer mode cell.