Malik S Khan

US Patent:

20010047421, Nov 29, 2001

Filed:

Jul 23, 2001

Appl. No.:

09/911201

Inventors:

Manickam Sridhar - Holliston MA, US
Boris Boruchovich - Bedford MA, US
Steven Sigel - North Andover MA, US
Sylvain Louchez - Wrentham MA, US
Malik Khan - Sherborn MA, US
Mary Sabin - St. Milton MA, US

Assignee:

Sitara Networks, Inc. a Delaware corporation

International Classification:

G06F015/16

US Classification:

709/230000

Abstract:

A communication system in which client and server communication systems are coupled over a data network. A request to communicate with one of the server communication systems is accepted and based on an identification of the server communication system in the request, one of a set of transport layer protocols is selected for communication between the client and server systems. The set of transport layer protocols can be determined by retrieving information from a directory service computer, such as an Internet Domain Name Server (DNS), where the address of the directory service computer is related to the identification of the server communication system. In addition, the server communication system can include an address translation table that associates a network address provided by a client communication system with local network addresses of server computers. The server communication system selects one of the server computers in response to a request from the client communication system and passes communication between the client system and the selected server computer.

US Patent:

55219268, May 28, 1996

Filed:

Aug 1, 1994

Appl. No.:

8/283369

Inventors:

Douglas I. Ayerst - Delray Beach IL
Brian J. Budnik - Schaumburg IL
Malik J. Khan - Lake Worth FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04J 306

US Classification:

370953

Abstract:

A fixed system receiver (107), which includes a forward receiver (305), a reverse receiver (310), and a response timer (215), is for use in a radio communication system (100) having a forward radio channel and a reverse radio channel. A command is transmitted in a forward channel radio signal to a selective call transceiver. The forward receiver (305) is for receiving, demodulating, and decoding the command. The reverse receiver (310) is for receiving and demodulating the reverse channel radio signal. The response timer (215), which is coupled to the forward receiver (305) and the reverse receiver (310), is for determining a response period beginning substantially at a scheduled response time included in the command and having a duration which is substantially a designated length of the data unit included in the command, and for generating a control signal which enables the reverse receiver (310) during the response period.

US Patent:

62667017, Jul 24, 2001

Filed:

Jul 2, 1997

Appl. No.:

8/886869

Inventors:

Manickam R. Sridhar - Holliston MA
Sylvain Louchez - Oakville, CA
Malik Z. Khan - Sherborn MA

Assignee:

Sitara Networks, Inc. - Waltham MA

International Classification:

G06F 1516

US Classification:

709232

Abstract:

A communication system for improving communication over a data network between an application and remote systems where each of the remote systems is configured to communicate using at least one of multiple transport layer communication protocols. The communication system accepts a request from the application to communicate with one of the remote systems, selects a transport layer communication protocols for communicating with the requested remote system, and communicates using the selected transport protocol with the requested system. In addition, the system may select one of multiple network layer communication protocols to communicate with the requested remote system. The application may be configured to communicate using a first of the transport protocols and request to communicate with a remote system using that first protocol, while the selected protocol may be another protocol. Furthermore, in one feature, the selected transport layer protocol supports selective retransmission while the requested protocol does not support selective retransmission. In another feature, the selected communication protocol supports transmission rate control while the requested protocol does not support transmission rate control.

US Patent:

63245825, Nov 27, 2001

Filed:

Oct 20, 1998

Appl. No.:

9/176065

Inventors:

Manickam R. Sridhar - Holliston MA
Boris Boruchovich - Bedford MA
Steven Sigel - North Andover MA
Sylvain Louchez - Wrentham MA
Malik Z. Khan - Sherborn MA
Mary Sabin - Milton MA

Assignee:

Sitara Networks, Inc. - Waltham MA

International Classification:

G06F 1516

US Classification:

709230

Abstract:

A communication system in which client and server communication systems are coupled over a data network. A request to communicate with one of the server communication systems is accepted and based on an identification of the server communication system in the request, one of a set of transport layer protocols is selected for communication between the client and server systems. The set of transport layer protocols can be determined by retrieving information from a directory service computer, such as an Internet Domain Name Server (DNS), where the address of the directory service computer is related to the identification of the server communication system. In addition, the server communication system can include an address translation table that associates a network address provided by a client communication system with local network addresses of server computers. The server communication system selects one of the server computers in response to a request from the client communication system and passes communication between the client system and the selected server computer.

US Patent:

60981083, Aug 1, 2000

Filed:

Jan 30, 1998

Appl. No.:

9/016120

Inventors:

Manickam R. Sridhar - Holliston MA
Boris Boruchovich - Bedford MA
Steven Sigel - North Andover MA
Sylvain Louchez - Wrentham MA
Malik Z. Khan - Sherborn MA

Assignee:

Sitara Networks, Inc. - Waltham MA

International Classification:

G06F 1300

US Classification:

709239

Abstract:

When establishing a communication path between a client system and a server system which are coupled over a data network, the client system accesses distributed directory information in order to determine whether a communication path to the server computer can use an enhanced communication approach, such as an enhanced transport or application layer protocol, and to obtain an address of a second server system which will provide communication services needed to communicate using the enhanced communication approach. By using distributed information, and in particular by distributing the information at the server systems themselves, the invention reduces or eliminates the reliance on critical points of failure or congestion, such as a Internet Domain Name Server (DNS) or a centralized repository of information related to the enhanced communication.