Daniel C Biederman

US Patent:

7006526, Feb 28, 2006

Filed:

Jul 31, 2001

Appl. No.:

09/920533

Inventors:

Daniel C. Biederman - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 3/16
H04L 12/26
H04Q 7/20

US Classification:

370466, 370252, 370392, 370389, 370236, 4554322

Abstract:

Disclosed are methods and apparatus for avoiding problems caused by converting between two different protocols, such as IPv4 and IPv6. These problems may include, but are not limited to, fragmentation of packets, dropping of packets, and retransmission of packets. Avoiding these problems will reduce the incidence of transmission delays, bandwidth degradation, and additional processing in the packet's transmission path due to such problems. In general terms, the present invention provides mechanisms for modifying a protocol parameter, such as a TCP or UDP parameter, to avoid problems associated with protocol translation, such as fragmentation. In one implementation, the protocol parameter limits the size of a particular portion of the a packet transmitted by a sending computer node or device. For example, a packet size indicator is communicated to the sending computer node so that the sending computer node sends packets limited by the packet size indicator to thereby avoid associated with the size of such packets. In specific TCP embodiments, the size indicator specifies a window size and/or a maximum segment size.

US Patent:

7069342, Jun 27, 2006

Filed:

Mar 1, 2001

Appl. No.:

09/798816

Inventors:

Daniel Biederman - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16

US Classification:

709247, 709246

Abstract:

Methods and apparatus for dynamically adapting the degree of compression used in compressing data based upon the type of contents contained within a packet are disclosed. According to one aspect of the present invention, an apparatus that forwards data across a digital communications network includes a compression switch, a compression system, and an output interface. The compression switch receives the data, determines a content type associated with the data by examining the data, and assigns a compression level to the data in response to the determined content type. The compression system is arranged to compress the data based upon the compression level, while the output interface forwards the compressed data across the network. In one embodiment, the apparatus also includes a network congestion estimator that determines a level of network congestion.

US Patent:

7089320, Aug 8, 2006

Filed:

Jun 1, 2001

Appl. No.:

09/872989

Inventors:

Daniel C. Biederman - San Jose CA, US
Vivian W. Chiang - Mountain View CA, US
Jeffrey P. Chou - Foster City CA, US
Malathy Sethuraman - San Jose CA, US
Constantine P. Sapuntzakis - Stanford CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16

US Classification:

709234, 709231, 709232, 709236, 709238

Abstract:

Disclosed are methods and apparatus for combining data segments. At a combiner node, data segments are received from a first node that are destined for a second node. At the combiner node, the received data segments are combined and buffered with previously buffered data segments from the first node if present until a first condition is met. At the combiner node, at least a portion of the combined data segments are sent to the second node when the first condition is met. The received data segments are combined in the combiner node prior to being sent to the second node so as to reduce processing and/or storage resources consumed by the second node.

US Patent:

7240224, Jul 3, 2007

Filed:

Aug 29, 2003

Appl. No.:

10/651596

Inventors:

Daniel C. Biederman - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 1/00
G06F 1/26
G06F 1/32
G06F 11/30

US Classification:

713300, 713310, 713320, 713340

Abstract:

A network power system that is capable of communicating and resolving various inline power allocation issues. The system includes a power source equipment having at least one output power interface capable of transmitting inline power, at least one powered device having an input power interface capable of receiving inline power, and a first transmission media that is coupled between the power source equipment and the at least one powered device. Either or both of the power source equipment and the at least one powered device includes a negotiator that is capable of communicating and resolving the at least one inline power allocation issue. The negotiator, independently or in combination with other negotiators, reaches a negotiated decision and performs at least one response function in an effort to resolve the at least one inline power allocation issue. The system may have a multi-point layout or be experiencing a power outage condition.

US Patent:

7313686, Dec 25, 2007

Filed:

Sep 30, 2003

Appl. No.:

10/676390

Inventors:

Daniel C. Biederman - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 9/12

US Classification:

713151

Abstract:

An apparatus for providing link layer security in a Physical Layer Transceiver (PHY) is disclosed. In one embodiment, the apparatus may comprise analog circuitry configured to interface with a data transmission medium, digital circuitry configured to interface with a Media Access Controller (MAC); and an crypto engine coupled to the digital circuitry.

US Patent:

7319667, Jan 15, 2008

Filed:

Nov 15, 2000

Appl. No.:

09/713849

Inventors:

Daniel Biederman - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/26

US Classification:

370231, 3702301, 370465, 370466, 370477

Abstract:

A data compression system that dynamically adapts the degree of compression used in response to the priority of the data to be compressed is provided by virtue of one embodiment of the present invention. In one embodiment, only low priority data is compressed while high priority data is passed through to the network in uncompressed form. Also, the compression ratio can be varied depending on the priority of the data to allocate a larger portion of available bandwidth to higher priority traffic while imposing greater compression related delay on lower priority traffic.

US Patent:

7366123, Apr 29, 2008

Filed:

Dec 12, 2001

Appl. No.:

10/016087

Inventors:

Daniel C. Biederman - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G08C 17/00

US Classification:

370311, 370318

Abstract:

A device and method to allocate a secondary power supply to a Fiber-to-the-Home subscriber is disclosed. The present invention employs methods to selectively accept or rejects packets in order to conserve power of the secondary power supply while allowing critical packets to reach their destinations.

US Patent:

7620846, Nov 17, 2009

Filed:

Oct 7, 2004

Appl. No.:

10/961243

Inventors:

Daniel Biederman - San Jose CA, US
Kenneth Coley - Campbell CA, US
Frederick R. Schindler - Sunnyvale CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

714 14

Abstract:

A method and apparatus for redundant power and data over a wired data telecommunications network permits power to be received at a local powered device (PD) from remote power sourcing equipment (PSE) via at least one conductor at a first time and power and/or data to be obtained by the local device from another port of the remote device or another remote device at a second different time. Power levels obtained may be adjusted from time to time in response to circumstances.