Andrew T Chang

US Patent:

6697368, Feb 24, 2004

Filed:

May 15, 2001

Appl. No.:

09/855031

Inventors:

Andrew Chang - Mountain View CA
Ronak Patel - Santa Clara CA
Ming G Wong - San Jose CA

Assignee:

Foundry Networks, Inc. - San Jose CA

International Classification:

H04L 1256

US Classification:

3703951, 370389, 3703957, 370471, 370476

Abstract:

The present invention provides a high-performance network switch. A digital switch has a plurality of blades coupled to a switching fabric via serial pipes. Serial link technology is used in the switching fabric. Each blade outputs serial data streams with in-band control information in multiple stripes to the switching fabric. The switching fabric includes a plurality of cross points corresponding to the multiple stripes. In one embodiment five stripes and five cross points are used. Each blade has a backplane interface adapter (BIA). One or more integrated bus translators (IBTs) and/or source packet processors are coupled to a BIA. An encoding scheme for packets of data carried in wide striped cells is provided.

US Patent:

6735218, May 11, 2004

Filed:

May 15, 2001

Appl. No.:

09/855024

Inventors:

Andrew Chang - Mountain View CA
Ronak Patel - Santa Clara CA
Ming G Wong - San Jose CA

Assignee:

Foundry Networks, Inc. - San Jose CA

International Classification:

H04J 316

US Classification:

370471, 370389, 3703951, 370446, 370474, 370476, 709236

Abstract:

A system and method for encoding wide striped cells that carry packets of data across stripes. The method encodes an initial block of a first wide striped cell is encoded with initial cell encoding information, and distributes initial bytes of packet data into available space in the initial block of the first wide striped cell. The initial cell encoding information includes control information and state information. One initial block of the first wide striped cell comprises five subblocks corresponding to five stripes. Each subblock includes identical control information and identical state information. The method further includes adding reserve information to available bytes at the end of the initial block of the first wide striped cell. Remaining bytes of packet data are distributed across one or more blocks in the first wide striped cell until an end of packet condition is reached or a maximum cell size is reached. Other steps include encoding the first wide striped cell or another wide striped cell with end of packet information.

US Patent:

7203194, Apr 10, 2007

Filed:

Mar 25, 2004

Appl. No.:

10/810301

Inventors:

Andrew Chang - Mountain View CA, US
Ronak Patel - Santa Clara CA, US
Ming G. Wong - San Jose CA, US

Assignee:

Foundry Networks, Inc. - Alviso CA

International Classification:

H04J 3/16

US Classification:

370389, 3703951, 370471, 370474, 709219, 709231

Abstract:

A system and method for encoding wide striped cells that carry packets of data across stripes. The method encodes an initial block of a first wide striped cell is encoded with initial cell encoding information, and distributes initial bytes of packet data into available space in the initial block of the first wide striped cell. The initial cell encoding information includes control information and state information. One initial block of the first wide striped cell comprises five subblocks corresponding to five stripes. Each subblock includes identical control information and identical state information. The method further includes adding reserve information to available bytes at the end of the initial block of the first wide striped cell. Remaining bytes of packet data are distributed across one or more blocks in the first wide striped cell until an end of packet condition is reached or a maximum cell size is reached. Other steps include encoding the first wide striped cell or another wide striped cell with end of packet information.

US Patent:

7206283, Apr 17, 2007

Filed:

Dec 17, 2003

Appl. No.:

10/736680

Inventors:

Andrew Chang - Los Altos CA, US
Ronak Patel - Los Gatos CA, US
Ming G Wong - San Jose CA, US

Assignee:

Foundry Networks, Inc. - Santa Clara CA

International Classification:

H04Q 11/00

US Classification:

370230, 370235, 370373, 370386

Abstract:

The present invention provides a high-performance network switch. A digital switch has a plurality of blades coupled to a switching fabric via serial pipes. Serial link technology is used in the switching fabric. Each blade outputs serial data streams with in-band control information in multiple stripes to the switching fabric. The switching fabric includes a plurality of cross points corresponding to the multiple stripes. In one embodiment five stripes and five cross points are used. Each blade has a backplane interface adapter (BIA). One or more integrated bus translators (IBTs) and/or source packet processors are coupled to a BIA. An encoding scheme for packets of data carried in wide striped cells is provided.

US Patent:

7236490, Jun 26, 2007

Filed:

May 15, 2001

Appl. No.:

09/855038

Inventors:

Andrew Chang - Mountain View CA, US
Ronak Patel - Santa Clara CA, US
Ming G Wong - San Jose CA, US

Assignee:

Foundry Networks, Inc. - Santa Clara CA

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370392, 370412, 370429, 370907

Abstract:

A backplane interface adapter for a high-performance network switch. The backplane interface adapter receives narrow input cells carrying packets of data and outputs wide striped cells to a switching fabric. One traffic processing path through the backplane interface adapter includes deserializer receivers, a traffic sorter, wide cell generators, stripe send queues, a backplane transmit arbitrator, and serializer transmitters. Another traffic processing path through the backplane interface adapter includes deserialize receivers, a stripe interface, stripe receive synchronization queues, a controller, wide/narrow cell translator, destination queues, and serializer transmitters. An encoding scheme for packets of data carried in wide striped cells is provided.

US Patent:

7304263, Dec 4, 2007

Filed:

Aug 5, 2004

Appl. No.:

10/911821

Inventors:

Andrew Chang - Oakland CA, US
Jeffrey W. Carr - Livermore CA, US
Jude Kelley - Belmont CA, US
Peter S. Fiske - Oakland CA, US

Assignee:

RAPT Industries, Inc. - Fremont CA

International Classification:

B23K 9/00

US Classification:

21912141, 21912148, 21912159, 15634539, 264 136, 216 38

Abstract:

The footprint of a reactive atom plasma processing tool can be modified using an aperture device. A flow of reactive gas can be injected into the center of an annular plasma. An aperture can be positioned relative to the plasma such that the effective footprint of the plasma can be changed without adjusting the gas flows or swapping out the tool. Once the aperture and tool are in position relative to a workpiece, reactive atom plasma processing can be used to modify the surface of the workpiece, such as to etch, smooth, polish, clean, and/or deposit material onto the workpiece. If necessary, a coolant can be circulated about the aperture. Multiple apertures can also be used to provide a variety of footprint sizes and/or shapes. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.

US Patent:

7356030, Apr 8, 2008

Filed:

May 15, 2001

Appl. No.:

09/855015

Inventors:

Andrew Chang - Mountain View CA, US
Ronak Patel - Santa Clara CA, US
Ming G. Wong - San Jose CA, US

Assignee:

Foundry Networks, Inc. - Santa Clara CA

International Classification:

H04L 12/28

US Classification:

370392, 370229, 370412

Abstract:

A switching fabric having cross points that process multiple stripes of serial data. Each cross point includes a plurality of port slices and ports. Each port includes a plurality of FIFOs, a FIFO read arbitrator, a multiplexer, a dispatcher, and an accumulator. In one embodiment, each cross point has eight ports and eight port slices. A method for processing a stripe of data at a cross point at one port slice includes storing data received from other port slices in a plurality of FIFOs and arbitrating the reading of the stored data. A step of writing data received from a port at the one port slice to an appropriate FIFO in a different port slice is also included. In one embodiment, a method for processing data in port slice based on wide cell encoding and an external flow control command is provided.

US Patent:

7512127, Mar 31, 2009

Filed:

May 21, 2007

Appl. No.:

11/804977

Inventors:

Andrew Chang - Mountain View CA, US
Ronak Patel - Santa Clara CA, US
Ming G. Wong - San Jose CA, US

Assignee:

Foundry Networks, Inc. - Santa Clara CA

International Classification:

H04L 12/28
H04L 12/56
H04L 12/54
H04L 1/00

US Classification:

370392, 370412, 370429, 370244, 370401

Abstract:

A backplane interface adapter for a network switch. The backplane interface adapter includes at least one receiver that receives input cells carrying packets of data; at least one cell generator that generates encoded cells which include the packets of data from the input cells; and at least one transmitter that transmits the generated cells to a switching fabric. The cell includes a destination slot identifier that identifies a slot of the switching fabric towards which the respective input cell is being sent. The generated cells include in-band control information.