Hisham Sami Abdelhamid

US Patent:

6865150, Mar 8, 2005

Filed:

Apr 6, 2000

Appl. No.:

09/544729

Inventors:

Mark M. Perkins - Cupertino CA, US
Hisham Abdelhamid - Palo Alto CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J003/14

US Classification:

370230, 370232, 370235, 37039521, 37039541, 370449, 370468

Abstract:

A system and method for controlling admission of a communication in a network are disclosed. In the network, a virtual circuit having a predetermined bandwidth is provided. A request is received for a communication having a communication bandwidth, and a total utilized bandwidth of the virtual circuit is calculated, including the communication bandwidth. If the total utilized bandwidth is less than the predetermined bandwidth of the virtual circuit, then admission in the network is granted to the communication.

US Patent:

7039007, May 2, 2006

Filed:

Jul 31, 2000

Appl. No.:

09/629316

Inventors:

Hisham Abdelhamid - Palo Alto CA, US
Madhav Marathe - Cupertino CA, US
Mark M. Perkins - Cupertino CA, US

Assignee:

Cicso Technology, Inc. - San Jose CA

International Classification:

H04L 12/26

US Classification:

370218, 370228, 370397

Abstract:

A system and method for improving reliability of a packet network are described. Data is transmitted on a first virtual circuit in the network. A message signaling a failure in receipt of the data is received on a second virtual circuit in the network. Finally, transmission of data is switched to the second virtual circuit within a predetermined period of time.

US Patent:

7466981, Dec 16, 2008

Filed:

Oct 25, 2005

Appl. No.:

11/259570

Inventors:

Hisham S. Abdelhamid - San Jose CA, US
Carlos V. Laux - San Ramon CA, US
Marcio Guidorizzi de Siqueira - San Jose CA, US
Jennifer K. Walker - Jackson WY, US
Kamaldip S. Toor - San Diego CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/40

US Classification:

455438, 455436, 455437, 455439, 455442, 455443, 455444, 370310, 370331, 370332, 370333, 370334, 370338

Abstract:

Handing off a node from a first access point to a second access point includes facilitating communication between a node and a network using a first access point. A handoff rule of one or more handoff rules is accessed. One or more handoff factors associated with the first access point and a second access point are determined. A handoff factor is relevant in deciding whether to handoff from the first access point to the second access point. The handoff rule is applied to the one or more handoff factors. Handoff of the node to the second access point is initiated if the one or more handoff factors satisfy the applied handoff rule.

US Patent:

7616604, Nov 10, 2009

Filed:

Oct 25, 2005

Appl. No.:

11/258925

Inventors:

Hisham S. Abdelhamid - San Jose CA, US
Carlos V. Laux - San Ramon CA, US
Marcio Guidorizzi de Siqueira - San Jose CA, US
Jennifer K. Walker - Jackson WY, US
Kamaldip S. Toor - San Diego CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04W 4/00

US Classification:

370329, 455434, 455450, 370338

Abstract:

Identifying one or more access points in one or more channels to facilitate communication includes identifying an access point in a channel in a first channel band of a first frequency range to facilitate communication with a network. The first channel band includes a plurality of channels and the first frequency range includes a plurality of channel bands. The identified access point is used to communicate with the network. A scanning sequence is initiated in the first frequency range and a second frequency range to identify one or more access points in one or more channels to facilitate communication. The second frequency range includes a plurality of channel bands.

US Patent:

7697433, Apr 13, 2010

Filed:

Dec 14, 2004

Appl. No.:

11/012372

Inventors:

Claus Dahm - San Jose CA, US
Hisham Sami Abdelhamid - San Jose CA, US
Joseph R. Stone - San Jose CA, US
Rajesh Kumar - Palo Alto CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/26
H04L 12/66
H04L 12/28

US Classification:

370235, 370356, 370389, 3703952, 370400, 37922101

Abstract:

A method and system for establishing a call between two endpoints residing on different media gateways in a decomposed voice over packet architecture. Cluster attributes identifying alternate bearer possibilities are exchanged between media gateways as part of capabilities negotiation which occurs during call setup conducted by an external call control element over a core network. The media gateways analyze the cluster attributes to determine whether bearer possibilities exist apart from the core network. If an alternate bearer possibility exists, the alternate is employed and the call is established via the alternate bearer directly between the media gateways, thus bypassing the core network.

US Patent:

8082347, Dec 20, 2011

Filed:

Nov 28, 2005

Appl. No.:

11/288744

Inventors:

Hisham S. Abdelhamid - San Jose CA, US
Carlos V. Laux - San Ramon CA, US
Marcio Guidorizzi de Siqueira - San Jose CA, US
Jennifer K. Walker - Jackson WY, US
Kamaldip S. Toor - San Diego CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16
G06F 1/00
H04M 11/00
H04W 4/00
H04W 36/00

US Classification:

709227, 455421, 455434, 455436, 713300

Abstract:

Providing probe signals from a node includes receiving at the node an instruction to send the probe signals over channels, where the instruction comprises probe parameter values describing deployment of the probe signals. The node sends the probe signals to a controller through access points. Each access point is associated with one or more channels. The controller is operable to assign an access point to the node in accordance with an analysis of the probe signals.

US Patent:

20070091904, Apr 26, 2007

Filed:

Oct 25, 2005

Appl. No.:

11/258855

Inventors:

Marcio Siqueira - San Jose CA, US
Carlos Laux - San Ramon CA, US
Hisham Abdelhamid - San Jose CA, US
Jennifer Walker - Jackson WY, US

International Classification:

H04L 12/56

US Classification:

370401000, 370252000

Abstract:

Maintaining session information includes initiating an access point session between a node and an access point of a local area network. A data structure is received from the access point. The data structure is operable to store session parameter values describing the first access point session, and is maintained the data structure at the node. The access point session is terminated. A next access point session between the node and the access point is initiated. The data structure is sent to the access point, and the access point is operable to use one or more of the session parameter values to establish the next access point session.

US Patent:

60234679, Feb 8, 2000

Filed:

May 8, 1997

Appl. No.:

8/848426

Inventors:

Hisham Sami Abdelhamid - Stanford CA
Mohamed Mostafa - Menlo Park CA

Assignee:

Ericsson, Inc. - Menlo Park CA

International Classification:

H04H 102
H04L 12403
H04L 1224

US Classification:

370395

Abstract:

Functional definitions and data transmission protocols are provided for both downstream and upstream OAM data flows in an ATM-based point-to-multipoint broadband access network ("BAN"), such as a passive optical network ("PON"). In particular, B-ISDN OAM functions are defined from an "OAM flow" perspective, wherein some of the PON physical layer related functions are performed at the F1 level flow, including all functions relating to the sign-on, ranging, power tuning, synchronization and timing status of the ONUs. F3 flow level functions are defined to include further performance and fault management functions, as well as MAC related functions, concerning mainly upstream and for upstream bandwidth management transactions between the headend facility and the respective ONUs. The F1 and F3 OAM data flows are transported in respective downstream frames and upstream packets in preferred protocols suitable for a point-to-multipoint network configuration. In particular, downstream F1 OAM flows are carried in specifically allocated overhead of each downstream frame header, with a downstream F1 "flow unit" defined as the entire frame.