Patents by Inventor Subir Varma
Subir Varma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7366133Abstract: A method and system for adaptive point to multipoint wireless communication. The method and system integrate adaptive and dynamic responsiveness for communication parameters related to multiple characteristics of wireless communication links, both for a single sender and a single receiver, and for sets of multiple senders and multiple receivers. Moreover, the method and system are self-optimizing in the sense that they are adaptively and dynamically responsive to results of attempts to optimize parameters related to multiple characteristics of wireless communication links. Multiple characteristics of wireless communication links are optimized simultaneously, in that the optimal set of values for a plurality of N characteristics, rather fan N individual optimal values for each characteristic, is adaptively and dynamically selected.Type: GrantFiled: July 21, 2000Date of Patent: April 29, 2008Assignee: Aperto Networks, Inc.Inventors: Reza Majidi-Ahy, Joseph Hakim, Subir Varma
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Patent number: 7349426Abstract: An Integrated, Self-Optimizing, Multi-Parameter/Multi-Variable Point-to-Multipoint Communication System provides integrated adaptive and dynamic responsiveness for communication parameters related to multiple characteristics of wireless communication links for a single sender, a single receiver, and for sets of multiple senders and multiple receivers. The method and system are self-optimizing and adaptively and dynamically respond to results of attempts to optimize parameters related to multiple characteristics of wireless communication links. Multiple characteristics of wireless communication links are optimized simultaneously, in that the optimal set of values for a plurality of N characteristics, rather than N individual optimal values for each characteristic, is adaptively and dynamically selected. A wireless PHY layer and wireless MAC layer collectively include a set of communication parameters, which are adaptively modified by a BSC for communication with a plurality of CPE.Type: GrantFiled: April 3, 2003Date of Patent: March 25, 2008Assignee: Aperto Networks, Inc.Inventors: Reza Majidi-Ahy, Joseph Hakim, Subir Varma
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Publication number: 20070211646Abstract: The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.Type: ApplicationFiled: March 30, 2007Publication date: September 13, 2007Applicant: Aperto Networks, Inc.Inventors: Reza Majidi-Ahy, Joseph Hakim, Subir Varma
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Publication number: 20070206544Abstract: A system for controlling a contention state for a communication link between a base station controller and customer premises equipment in point-to-multipoint communication. The contention state is controlled using a state machine, which includes a grant pending absent state in which a unicast request slot is maintained open for use by the customer premises equipment. During the grant pending absent state, the customer premises equipment sends no upstream data to the base station controller but can use the unicast request slot to request a data slot for sending upstream data to the base station controller. In the grant pending state, the customer premises equipment preferably uses piggybacking to request grant of a next data slot while sending upstream data to the base station controller.Type: ApplicationFiled: February 6, 2007Publication date: September 6, 2007Inventor: Subir Varma
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Patent number: 7212501Abstract: The invention provides a method and system for dynamically controlling link parameters during communication between one or more receiver/transmitters. Transmissions are sent as frames from a Base Station Controller to one or more Customer Premises Equipment. Together with a payload, each frame contains a special control message that pre-announces to both the transmitter and receiver the link parameters to be used until changed. The receiving Customer Premises Equipment processes the link parameters and returns a payload of its own within the same frame. With this dynamic approach, link parameters may be changed as often as every frame.Type: GrantFiled: November 16, 2004Date of Patent: May 1, 2007Assignee: Aperto Networks, Inc.Inventor: Subir Varma
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Patent number: 7206292Abstract: The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.Type: GrantFiled: December 22, 2005Date of Patent: April 17, 2007Assignee: Aperto Networks, Inc.Inventors: Reza Majidi-Ahy, Joseph Hakim, Subir Varma
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Patent number: 7173921Abstract: A system for controlling a contention state for a communication link between a base station controller and customer premises equipment in point-to-multipoint communication. The contention state is controlled using a state machine. The state machine includes a grant pending absent state in which a unicast request slot is maintained open for use by the customer premises equipment. During the grant pending absent state, the customer premises equipment sends no upstream data to the base station controller but can use the unicast request slot to request a data slot for sending upstream data to the base station controller. Preferably, the state machine further includes an idle state in which the customer premises equipment awaits arrival of data packets to send as upstream data to the base station controller. The state machine preferably further includes a deferring state in which the customer premises equipment defers contending for the data slot so as to avoid collisions with other customer premises equipment.Type: GrantFiled: October 11, 2000Date of Patent: February 6, 2007Assignee: Aperto Networks, Inc.Inventor: Subir Varma
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Publication number: 20060268885Abstract: Point to multipoint wireless communication, including automatic retransmission and error recovery for packet oriented point to multipoint communication, which integrates adaptive and dynamic responsiveness for parameters for automatic retransmission using wireless communication. A wireless communication link is divided into a downstream portion and an upstream portion. Parameters are selected for automatic retransmission independently for the downstream portion and the upstream portion of the wireless communication link. A BSC controls the selection of parameters for automatic retransmission for all CPE within a cell. As part of a TDD frame, in which the BSC and the CPE share communication bandwidth using a TDMA technique, the BSC includes its selection of parameters for automatic retransmission to be used by CPE within a control section of the TDD frame.Type: ApplicationFiled: April 26, 2006Publication date: November 30, 2006Inventor: Subir Varma
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Patent number: 7139251Abstract: The invention provides a method and system for scheduling for links having changing parameters. The method and system for scheduling for links having changing parameters is responsive to variations in communication capacity of communication links, such as wireless communication links in a wireless communication system. A BSC communicates with a plurality of CPE, including dynamically varying communication parameters for each CPE and substantially simultaneously scheduling traffic for each such CPE in response to those varying communication parameters. The BSC can schedule communication with each individual CPE in response to both (1) requested communication bandwidth and (2) varying communication capacity of the communication link between the BSC and that individual CPE. In a preferred embodiment, the BSC communicates with each CPE during a TDD frame. Sequences of such frames can each have differing communication parameters and can each be separately processed by the scheduling technique.Type: GrantFiled: April 9, 2002Date of Patent: November 21, 2006Assignee: Aperto Networks, Inc.Inventor: Subir Varma
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Patent number: 7099289Abstract: Point to multipoint wireless communication, including automatic retransmission and error recovery for packet oriented point to multipoint communication, which integrates adaptive and dynamic responsiveness for parameters for automatic retransmission using wireless communication. A wireless communication link is divided into a downstream portion and an upstream portion. Parameters are selected for automatic retransmission independently for the downstream portion and the upstream portion of the wireless communication link. A BSC controls the selection of parameters for automatic retransmission for all CPE within a cell. As part of a TDD frame, in which the BSC and the CPE share communication bandwidth using a TDMA technique, the BSC includes its selection of parameters for automatic retransmission to be used by CPE within a control section of the TDD frame.Type: GrantFiled: October 17, 2003Date of Patent: August 29, 2006Assignee: Aperto Networks, Inc.Inventor: Subir Varma
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Publication number: 20060153094Abstract: The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.Type: ApplicationFiled: December 22, 2005Publication date: July 13, 2006Applicant: Aperto Networks, Inc.Inventors: Reza Majidi-Ahy, Joseph Hakim, Subir Varma
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Patent number: 7068639Abstract: A method of managing TDD across plural channels. In the method, frames are synchronized across the plural channels so that upstream frames and downstream frames coincide across the plural channels. Preferable, one channel is assigned to each of plural CPEs. Each CPE receives MAP messages on its assigned channel. A base station controller preferably generates the MAP messages. The MAP messages instruct the CPEs to switch channels so as to receive data bursts. The base station controller preferably includes a centralized scheduler that allocates channels and slots in those channels to the CPEs for receipt of the data bursts. Also, a method of receiving TDD messages. According to the method, CPEs switch channels based on received media access protocol messages so as to receive data bursts on plural channels. The channel to which a CPE switches need not be the same channel as the one on which the CPE receives its MAP messages.Type: GrantFiled: September 19, 2000Date of Patent: June 27, 2006Assignee: Aperto Networks, Inc.Inventors: Subir Varma, Joseph Hakim
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Publication number: 20060098582Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur.Type: ApplicationFiled: September 20, 2005Publication date: May 11, 2006Applicant: Aperto Networks, Inc.Inventors: Subir Varma, Reza Majidi-Ahy, Joseph Hakim, Wendy Wong
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Patent number: 6992986Abstract: The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.Type: GrantFiled: November 21, 2003Date of Patent: January 31, 2006Assignee: Aperto Networks, Inc.Inventors: Majidi-Ahy Reza, Joseph Hakim, Subir Varma
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Patent number: 6947479Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur.Type: GrantFiled: November 3, 2003Date of Patent: September 20, 2005Assignee: Apex Networks, Inc.Inventors: Subir Varma, Reza Majidi-Ahy, Joseph Hakim, Wendy Chiu Fai Wong
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Patent number: 6819657Abstract: The invention provides a method and system for dynamically controlling link parameters during communication between one or more receiver/transmitters. Transmissions are sent as frames from a Base Station Controller to one or more Customer Premises Equipment. Together with a payload, each frame contains a special control message that pre-announces to both the transmitter and receiver the link parameters to be used until changed. The receiving Customer Premises Equipment processes the link parameters and returns a payload of its own within the same frame. With this dynamic approach, link parameters may be changed as often as every frame.Type: GrantFiled: November 16, 2000Date of Patent: November 16, 2004Assignee: Aperto Networks, Inc.Inventor: Subir Varma
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Publication number: 20040136400Abstract: The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.Type: ApplicationFiled: November 21, 2003Publication date: July 15, 2004Applicant: Aperto Networks, Inc.Inventors: Reza Majidi-Ahy, Joseph Hakim, Subir Varma
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Publication number: 20040136331Abstract: Point to multipoint wireless communication, including automatic retransmission and error recovery for packet oriented point to multipoint communication, which integrates adaptive and dynamic responsiveness for parameters for automatic retransmission using wireless communication. A wireless communication link is divided into a downstream portion and an upstream portion. Parameters are selected for automatic retransmission independently for the downstream portion and the upstream portion of the wireless communication link. A BSC controls the selection of parameters for automatic retransmission for all CPE within a cell. As part of a TDD frame, in which the BSC and the CPE share communication bandwidth using a TDMA technique, the BSC includes its selection of parameters for automatic retransmission to be used by CPE within a control section of the TDD frame.Type: ApplicationFiled: October 17, 2003Publication date: July 15, 2004Applicant: Aperto Networks, Inc.Inventor: Subir Varma
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Publication number: 20040133837Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur.Type: ApplicationFiled: November 3, 2003Publication date: July 8, 2004Applicant: Aperto Networks, Inc., a California corporationInventors: Subir Varma, Reza Majidi-Ahy, Joseph Hakim, Wendy Chiu Fai Wong
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Publication number: 20040132459Abstract: The invention provides a method and system for a wireless transport layer, such as for use in a wireless communication system. In a preferred embodiment, the wireless transport layer includes the capability for instructing customer premises equipment to adjust the physical characteristics on its communication link with the base station controller, and for instructing customer premises equipment to conduct further communications using those new physical characteristics. The wireless transport layer includes a number of provisions for adjusting communication between the base station controller and customer premises equipment in view of the prospect of adjusting physical characteristics for communication between the two end points. The use of a point-to-multipoint wireless channel provides services over a link whose parameters are continuously adapting to current conditions on a per-user basis.Type: ApplicationFiled: September 30, 2003Publication date: July 8, 2004Applicant: Aperto Networks, Inc.Inventors: Subir Varma, Khuong Ngo, Jean Fuentes, Paul Truong, Majidi-Ahy Reza