MOHAMED KHALIL
Osteopathic Medicine at Fannin St, Houston, TX

6751672, Jun 15, 2004

Jun 2, 1999

09/324323

Mohamed Khalil - Dallas TX
Emad Qaddoura - Plano TX
Haseeb Akhtar - Garland TX

Nortel Networks Limited - St. Laurent

G06F 1516

709230, 709201, 709220, 714 4, 379219, 379309

An efficient and improved dynamic home agent discovery algorithm and system to be used in a protocol for network communications. The present invention encapsulates and integrates communications of the home agents into a single home agent communication. Communication between a mobile node and the home agents is simplified to a single home agent communication. Dynamic home agent discovery processes are performed, based on the single home agent communication. Encapsulation is achieved by having each of the home agents maintain a home agent list that contains information about each of the home agents coupled to the home link. A designated home agent receives and processes home agent discovery requests from the mobile node on behalf of home agents coupled to the home link, and a designated home agent sends home agent advertisements to and communicates with the mobile node.

6430698, Aug 6, 2002

Jun 2, 1999

09/324322

Mohamed Khalil - Dallas TX
Emad Qaddoura - Plano TX
Carey Becker - Plano TX
Russel Coffin - Plano TX
Haseeb Akhtar - Garland TX

Nortel Networks Limited - St. Laurent

G06F 15173

714 4, 709201, 455 63, 710105

A computer protocol that manages and provides efficient communications and utilization of resources between a mobile computer system or device and other systems and devices. Each home agent maintains a home agent list containing information about each of the home agents coupled to the home link. A designated home agent on behalf of the home agents for a virtual home agent is used to send and broadcast home agent advertisement, to receive and process a request from a mobile node, to process and send a reply to the mobile node. Synchronization mechanisms or tools, such as home agent priority or floating token method, are provided for proper operation of a Virtual Distribution Home Agent Protocol (VDHAP). These mechanisms or tools are used to fairly distribute loads from the mobile node among the home agents within the virtual home agent.

7173917, Feb 6, 2007

Mar 31, 2000

09/540362

Raja P. Narayanan - Irving TX, US
Mohamed Khalil - Dallas TX, US
Haseeb Akhtar - Garland TX, US
Emad A. Qaddoura - Plano TX, US

Nortel Networks Limited - St. Laurent

H04Q 7/00, H04Q 7/20, H04B 7/216, H04L 12/66, H04J 3/16

370331, 370335, 370342, 370356, 370466, 4554351

An improved wireless mobile IP system including an apparatus and method for managing transmission of information. Agent advertisements are used to detect movement of the mobile node and derive care-of addressing information for the Home Agent. Foreign Agents and Home Agents currently periodically broadcast an agent advertisement on the data channel. The claimed system reduces the need for agent advertisements by detecting movement of a mobile user into a new network using either the mobile node or a routine on a low-level protocol layer. After detection of movement, an agent solicitation message is transmitted from the mobile node or from the cell-site transmitter. The mobility agent then transmits a single agent advertisement in response. Derived care-of addressing information will then be registered with the Home Agent to support “tunneling” of communications to the mobile node through the foreign network. Transmission of agent advertisements and associated non-data traffic on the data channels will be reduced.

6574214, Jun 3, 2003

May 25, 2000

09/579069

Mohamed Khalil - Dallas TX
Emad A. Qaddoura - Plano TX
Haseeb Akhtar - Garland TX
Russell C. Coffin - Plano TX
Liem Q. Le - Richardson TX
Krish Pillai - Dallas TX

Nortel Networks Limited

H04L 1228

370349, 370389, 370392, 709238, 455445

In a mobile communication system having mobile foreign agents, the present invention eliminates the use of multiple source/destination headers attached to an information packet during the tunneling operation by using either a decapsulation/encapsulation or a forwarding operation with the encapsulated information packet. Either of these operations reduces the overhead incurred in the multiple encapsulation headers by reducing encapsulation of the information packet to a single level. Upon receipt of the information packet at the foreign agent on the communications system, the information packet is directed to the mobile node using a routing chain table maintained by the foreign agent or a next hop routing table maintained by the foreign agent and each mobile foreign agent in the transmission path. Once implemented, these data structures can also assist with routing of information packets within the foreign subnetwork.

6578085, Jun 10, 2003

Aug 6, 1999

09/369944

Mohamed M. Khalil - Dallas TX
Emad Q. Qaddoura - Plano TX
Haseeb Akhtar - Garland TX
Liem Le - Richardson TX

Nortel Networks Limited - St. Laurent

G06F 1314

709241, 709245

A system and method for route optimization in a wireless Internet Protocol (IP) network. The system and method send, to a home agent, a data packet; transmit, to a mobile node, the data packet using a first address; maintain a list of correspondent nodes associated with the mobile node; send, to the correspondent node, a binding update message; and transmit, directly to the mobile node, subsequent data packets using the first address. The system and method additionally: transmit, to a home agent, a registration request comprising a new address; transmit, to a mobile node, a registration reply in response to the registration request; compare the new address to an old address; if the new address and the old address are not equal, transmit, to the correspondent node, a binding update message; transmit, to the home agent, a binding acknowledgment in response to the binding update message; and transmit, to the mobile node, all subsequent messages via the new address.

8505088, Aug 6, 2013

Aug 24, 2009

12/546282

Mohamed Khalil - Dallas TX, US
Raja P. Narayanan - Irving TX, US
Haseeb Akhtar - Garland TX, US
Emad A. Qaddoura - Plano TX, US

Microsoft Corporation - Redmond WA

G06F 17/00

726 15

Provided is a method of providing secure communication between an initiator and a responder in a communication network. The method includes presenting a registration request with one or more proposals for dynamically establishing a security association between the initiator and the responder, and receiving a registration response indicating whether any of the one or more proposals have been accepted for the security association.

7333451, Feb 19, 2008

Oct 13, 2000

09/687881

Mohamed Khalil - Dallas TX, US
Emad A. Qaddoura - Plano TX, US
Haseeb Akhtar - Garland TX, US

Nortel Networks Limited - St. Laurent, Quebec

H04L 12/66, H04Q 7/20, H04Q 7/24

370331, 370338, 370352, 455436

Disclosed is a buffer management method for a mobile node in a mobile IP telecommunication network. The buffer management method supports a handoff of the mobile node from a first agent of a first network to a second agent of a second network. The method begins upon initiation of the handoff. A first message is sent to the first agent requesting the first agent to buffer any packets being sent to the mobile node. While the buffering is being performed, the handoff may be completed to the second agent. Once the handoff is complete, a second message can be sent to the first agent requesting the first agent to forward the buffered packets to the second agent.