Patents by Inventor Nimal Senarath
Nimal Senarath 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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Publication number: 20110237262Abstract: The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.Type: ApplicationFiled: June 13, 2011Publication date: September 29, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal SENARATH, Bill GAGE, Shalini PERIYALWAR, Wen TONG
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Publication number: 20110235618Abstract: The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.Type: ApplicationFiled: June 10, 2011Publication date: September 29, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal SENARATH, Bill GAGE, Shalini PERIYALWAR, Wen TONG
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Publication number: 20110212740Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: ApplicationFiled: May 9, 2011Publication date: September 1, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Periyalwar
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Publication number: 20110201374Abstract: Systems and methods are provided for delivering both PMP communications, for example standard cellular communications via a base station, and also delivering P2P communications, for example, communications between two mobile stations, using the same spectral resources for both types of communication.Type: ApplicationFiled: January 25, 2011Publication date: August 18, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: SHALINI PERIYALWAR, HANG ZHANG, NIMAL SENARATH, DEREK YU, KELVIN KAR-KIN AU, KARL MANN
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Patent number: 7979072Abstract: The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.Type: GrantFiled: June 3, 2005Date of Patent: July 12, 2011Assignee: Nortel Networks LimitedInventors: Nimal Senarath, Bill Gage, Shalini Periyalwar, Wen Tong
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Patent number: 7957746Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: GrantFiled: May 4, 2010Date of Patent: June 7, 2011Assignee: Nortel Networks LimitedInventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Periyalwar
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Patent number: 7877106Abstract: Systems and methods are provided for delivering both PMP communications, for example standard cellular communications via a base station, and also delivering P2P communications, for example, communications between two mobile stations, using the same spectral resources for both types of communication.Type: GrantFiled: May 13, 2009Date of Patent: January 25, 2011Assignee: Nortel Networks LimitedInventors: Shalini Periyalwar, Hang Zhang, Nimal Senarath, Derek Yu, Kelvin Kar-Kin Au, Karl Mann
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Publication number: 20100216499Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: ApplicationFiled: May 4, 2010Publication date: August 26, 2010Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Peliyalwar
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Patent number: 7769401Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: GrantFiled: July 16, 2008Date of Patent: August 3, 2010Assignee: Nortel Networks LimitedInventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Peliyalwar
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Patent number: 7664082Abstract: A method of scheduling transmission from radios having multiple radios is provided, where the number of radios is smaller than then number of neighbours to which transmission needs to occur. Scheduling blocks are identified consisting of sets of neighbours that can be transmitted to simultaneously without interference. Then, the scheduling blocks are used for scheduling purposes.Type: GrantFiled: September 30, 2005Date of Patent: February 16, 2010Assignee: Nortel Networks LimitedInventors: Shalini Periyalwar, Kelvin Kar-Kin Au, Nimal Senarath
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Publication number: 20090221325Abstract: Systems and methods are provided for delivering both PMP communications, for example standard cellular communications via a base station, and also delivering P2P communications, for example, communications between two mobile stations, using the same spectral resources for both types of communication.Type: ApplicationFiled: May 13, 2009Publication date: September 3, 2009Applicant: NORTEL NETWORKS LIMITEDInventors: SHALINI PERIYALWAR, HANG ZHANG, NIMAL SENARATH, DEREK YU, KELVIN KAR-KIN AU, KARL MANN
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Patent number: 7548758Abstract: Systems and methods are provided for delivering both PMP communications, for example standard cellular communications via a base station, and also delivering P2P communications, for example, communications between two mobile stations, using the same spectral resources for both types of communication.Type: GrantFiled: April 2, 2004Date of Patent: June 16, 2009Assignee: Nortel Networks LimitedInventors: Shalini Periyalwar, Hang Zhang, Nimal Senarath, Derek Yu, Kelvin Kar-Kin Au, Karl Mann
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Publication number: 20090141668Abstract: A method and system for wireless communication in which a plurality of media access control (“MAC”) packet data units (“PDUs”) corresponding to a plurality of wireless communication connections are received. The plurality of MAC PDUs is grouped into a relay packet and the relay packet is transmitted. Such grouping and transmission of the relay packet is performed by one or more relay nodes. The traffic control for the transmission can also be based on centralized or decentralized routing control and/or centralized or decentralized QoS control.Type: ApplicationFiled: May 11, 2007Publication date: June 4, 2009Applicant: Nortel Networks LimitedInventors: Hang Zhang, Peiying Zhu, Mo-Han Fong, Wen Tong, Nimal Senarath, Derek Yu, David Steer, Curtis S. Dodd
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Publication number: 20090053994Abstract: A wireless network includes a base station and a relay station for extending wireless coverage of the base station. Downlink data is sent by the base station and relayed through the relay station to a mobile station, where the downlink data is associated with a preamble that is sent directly from the base station to the mobile station. A transmit power of the relay station is adjusted for transmitting the downlink data from the relay station to the mobile station to reduce a difference between a first power level of the preamble received at the mobile station and a second power level of the downlink data received at the mobile station. The uplink transmit power of the mobile station for the data sent to the relay station is adjusted to compensate for the difference in path loss from mobile station to base station and mobile station to relay station and to compensate for the difference in noise_plus_interference level at relay station compared to that of the base station.Type: ApplicationFiled: August 25, 2008Publication date: February 26, 2009Applicant: Nortel Networks LimitedInventors: Nimal Senarath, David Steer, Derek Yu, Hang Zhang, Peiying Zhu, Wen Tong, Israfil Bahceci
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Publication number: 20080274760Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: ApplicationFiled: July 16, 2008Publication date: November 6, 2008Inventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Peliyalwar
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Patent number: 7412254Abstract: To schedule uplink transmission time slots for a collection of mobile. communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: GrantFiled: December 16, 2004Date of Patent: August 12, 2008Assignee: Nortel Networks LimitedInventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Peliyalwar
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Publication number: 20080080409Abstract: Methods and systems for providing efficient communications between two mobile stations served by the same base station or relay station are provided. A base station maintains information identifying which mobile stations it is serving. When a connection is set up between two mobile stations, if they are both being served by the same base station, the base station forwards traffic directly between the two mobile stations without forwarding it on to higher level network entities.Type: ApplicationFiled: September 28, 2007Publication date: April 3, 2008Inventors: Hang Zhang, Peiying Zhu, Wen Tong, Nimal Senarath, Derek Yu
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Publication number: 20080076432Abstract: The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.Type: ApplicationFiled: June 3, 2005Publication date: March 27, 2008Inventors: Nimal Senarath, Bill Gage, Shalini Periyalwar, Wen Tong
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Publication number: 20070142045Abstract: A method and apparatus for reducing signal interference within a cellular radio system to increase both coverage and capacity. The method and apparatus include altering the direction of beams within cell sectors is among discrete angular positions according to a predetermined, cyclic pattern. The predetermined, cyclic pattern varies in a group of adjacent cell sectors such that inter-cell interference is significantly reduced or eliminated by rotating at a different cycle the beams in adjacent cells. This discrete, angular movement of beams provides for downlink transmissions to be timed in such a way (i.e., scheduled) such that transmission to a user will occur in accordance with the beam and time slot having the best carrier to interference (C/I) ratio for that user.Type: ApplicationFiled: February 27, 2007Publication date: June 21, 2007Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal SENARATH, Yoon Chae CHEONG, Shalini PERIYALWAR, Robert MATYAS
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Patent number: 7218891Abstract: A multi-hop relaying method and apparatus used in a cellular network. The multi-hop transmission scheme utilizes intelligent relays within a conventional cellular system having at least one base station, one or more intelligent relays, and user equipment elements. The method includes selecting the strongest pilot signal from among the base stations and intelligent relays, reporting such to the base station, distributing an active user list to the relays along with scheduling and routing information via a relay control channel, and transmitting data according to a respective active user based upon the pilot signal strength to maximize coverage and capacity over the cellular system.Type: GrantFiled: July 14, 2003Date of Patent: May 15, 2007Assignee: Nortel Networks LimitedInventors: Shalini Periyalwar, Yoon Chae Cheong, Nimal Senarath