Patents by Inventor Israfil Bahceci
Israfil Bahceci 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: 8509089Abstract: A method selects a path for forwarding a data packet in a wireless communication system. A system capacity versus delay impact curve is calculated for a direct path to mobile station. The direct path has a capacity cost based on communication quality of a direct link between a base station and the mobile station. This curve is shifted by a predetermined time corresponding to an additional delay over a relay path to produce a projected capacity curve for the relay path having a second capacity cost determined according to a combined measure of signal quality of multiple links in the relay path. The second capacity cost is multiplied by a capacity cost ratio to produce a relay capacity curve. The direct path or the relay path is selected based on a comparison of the system capacity versus delay impact curve and the relay capacity curve according to a QoS requirement.Type: GrantFiled: February 27, 2012Date of Patent: August 13, 2013Assignee: Research In Motion LimitedInventors: Nimal Gamini Senarth, Derek Yu, Hang Zhang, Israfil Bahceci, Peiying Zhu, Wen Tong
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Frequency Division Duplexing and Half Duplex Frequency Division Duplexing in Multihop Relay Networks
Publication number: 20130070662Abstract: In methods of operating a relay station in a multi-hop wireless relay network, the relay station in communication with a superordinate station and a subordinate station, a downlink transmission to/from the superordinate station is transmitted/received at a first frequency. An uplink transmission to/from the subordinate station is transmitted/received at a second frequency. Communications between the relay station and the superordinate station may be scheduled using frames, each frame including a downlink portion at the first frequency, and an uplink portion at the second frequency. The downlink portion includes first and second downlink subframes for communication between the superordinate station and first and second pluralities of stations, respectively. The uplink portion includes first and second uplink subframes for communication between the superordinate station and the first and second pluralities of stations, respectively.Type: ApplicationFiled: September 14, 2012Publication date: March 21, 2013Inventors: Israfil Bahceci, Nimal Senerath, Hang Zhang, Peiying Zhu, Derek Yu, Wen Tong -
Publication number: 20130039259Abstract: A wireless network includes a relay station (RS) for extending wireless coverage of a base station. Data is sent by the base station and relayed through the RS to a mobile station (MS), where the data is associated with a preamble that is sent directly from the base station to the MS. A transmit power of the RS is adjusted for transmitting the data from the RS to the MS to reduce a difference between a first power level of the preamble received at the MS and a second power level of the data received at the MS. The uplink transmit power of the MS for the data sent to the RS is adjusted to compensate for the difference in path loss from MS to base station and MS to RS and to compensate for the difference in noise_plus_interference level at RS compared to that of the base station.Type: ApplicationFiled: September 14, 2012Publication date: February 14, 2013Inventors: Nimal Gamini Senarath, David Steer, Derek Yu, Hang Zhang, Peiying Zhu, Wen Tong, Israfil Bahceci
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Publication number: 20130010697Abstract: A wireless communication system and method for wireless communication in a multi-hop network. A first preamble is transmitted using a first repetition cycle. Monitoring for a second preamble is done in a second repetition cycle. The first repetition cycle is different than the second repetition cycle.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Inventors: Hang Zhang, Peiying Zhu, Wen Tong, Mo-han Fong, Nimal Gamini Senarath, David Steer, Derek Yu, James Mark Naden, Israfil Bahceci
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Publication number: 20130010680Abstract: 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 t 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: September 14, 2012Publication date: January 10, 2013Inventors: Nimal Senarath, David Steer, Derek Yu, Hang Zhang, Peiying Zhu, Wen Tong, Israfil Bahceci
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Publication number: 20130010601Abstract: A method selects a path for forwarding a data packet in a wireless communication system. A system capacity versus delay impact curve is calculated for a direct path to mobile station. The direct path has a capacity cost based on communication quality of a direct link between a base station and the mobile station. This curve is shifted by a predetermined time corresponding to an additional delay over a relay path to produce a projected capacity curve for the relay path having a second capacity cost determined according to a combined measure of signal quality of multiple links in the relay path. The second capacity cost is multiplied by a capacity cost ratio to produce a relay capacity curve. The direct path or the relay path is selected based on a comparison of the system capacity versus delay impact curve and the relay capacity curve according to a QoS requirement.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Inventors: Nimal Gamini Senarath, Derek Yu, Hang Zhang, Israfil Bahceci, Peiying Zhu, Wen Tong
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Patent number: 8331951Abstract: A system and method for uplink inter cell interference coordination and multi-user multiple input, multiple output in a wireless access system are provided. A method for providing uplink inter cell interference coordination in a wireless access system includes categorizing users the wireless access system, selecting a resource allocation plan based on the categorized users, allocating resources to the users in the wireless access system based on the selected resource allocation plan, and receiving transmissions from the users.Type: GrantFiled: May 21, 2012Date of Patent: December 11, 2012Assignee: FutureWei Technologies, Inc.Inventors: Hang Zhang, Jia Ming, Israfil Bahceci
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Patent number: 8320826Abstract: 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: GrantFiled: August 25, 2008Date of Patent: November 27, 2012Assignee: Research In Motion LimitedInventors: Nimal Senarath, David Steer, Derek Yu, Hang Zhang, Peiying Zhu, Wen Tong, Israfil Bahceci
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Patent number: 8311055Abstract: In accordance with an embodiment, a method of operating a base station configured to operate with user devices includes scheduling transmission for the user devices. Scheduling transmission includes determining a first fading metric for at least one user device from the at least one user device to the base station, determining at a second fading metric for the at least one user device from the at least one user device to at least one other base station, and determining a priority metric for the at least one user device based on the first and second fading metrics. The priority metric is configured to assign a higher priority to a user device with a first fading metric indicating an up-fade and the second fading metric indicating a down-fade. The method further includes transmitting a transmission schedule to the at least one user device based the priority metric.Type: GrantFiled: December 8, 2009Date of Patent: November 13, 2012Assignee: Futurewei Technologies, Inc.Inventors: Gamini Senarath, Israfil Bahceci, Peiying Zhu, Aaron Callard
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Publication number: 20120224650Abstract: A system and method for uplink inter cell interference coordination and multi-user multiple input, multiple output in a wireless access system are provided. A method for providing uplink inter cell interference coordination in a wireless access system includes categorizing users the wireless access system, selecting a resource allocation plan based on the categorized users, allocating resources to the users in the wireless access system based on the selected resource allocation plan, and receiving transmissions from the users.Type: ApplicationFiled: May 21, 2012Publication date: September 6, 2012Applicant: FUTUREWEI TECHNOLOGIES, INC.Inventors: Hang Zhang, Jia Ming, Israfil Bahceci
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Patent number: 8208937Abstract: A system and method for uplink inter cell interference coordination and multi-user multiple input, multiple output in a wireless access system are provided. A method for providing uplink inter cell interference coordination in a wireless access system includes categorizing users the wireless access system, selecting a resource allocation plan based on the categorized users, allocating resources to the users in the wireless access system based on the selected resource allocation plan, and receiving transmissions from the users.Type: GrantFiled: June 11, 2010Date of Patent: June 26, 2012Assignee: Futurewei Technologies, Inc.Inventors: Hang Zhang, Jia Ming, Israfil Bahceci
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Publication number: 20120155376Abstract: A method selects a path for forwarding a data packet in a wireless communication system. A system capacity versus delay impact curve is calculated for a direct path to mobile station. The direct path has a capacity cost based on communication quality of a direct link between a base station and the mobile station. This curve is shifted by a predetermined time corresponding to an additional delay over a relay path to produce a projected capacity curve for the relay path having a second capacity cost determined according to a combined measure of signal quality of multiple links in the relay path. The second capacity cost is multiplied by a capacity cost ratio to produce a relay capacity curve. The direct path or the relay path is selected based on a comparison of the system capacity versus delay impact curve and the relay capacity curve according to a QoS requirement.Type: ApplicationFiled: February 27, 2012Publication date: June 21, 2012Applicant: ROCKSTAR BIDCO, LPInventors: Nimal Gamini SENARATH, Derek YU, Hang ZHANG, Israfil BAHCECI, Peiying ZHU, Wen TONG
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Patent number: 8144597Abstract: A method selects a path for forwarding a data packet in a wireless communication system. A system capacity versus delay impact curve is calculated for a direct path to mobile station. The direct path has a capacity cost based on communication quality of a direct link between a base station and the mobile station. This curve is shifted by a predetermined time corresponding to an additional delay over a relay path to produce a projected capacity curve for the relay path having a second capacity cost determined according to a combined measure of signal quality of multiple links in the relay path. The second capacity cost is multiplied by a capacity cost ratio to produce a relay capacity curve. The direct path or the relay path is selected based on a comparison of the system capacity versus delay impact curve and the relay capacity curve according to a QoS requirement.Type: GrantFiled: December 31, 2008Date of Patent: March 27, 2012Assignee: Rockstar Bidco L.P.Inventors: Nimal Gamini Senarath, Derek Yu, Hang Zhang, Israfil Bahceci, Peiying Zhu, Wen Tong
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Publication number: 20110310814Abstract: In accordance with an embodiment, a method of operating a base station configured to communicate with a relay station includes allocating resources to the relay station. Allocating resources includes receiving feedback data from the relay station and scheduling resources to the relay station based on feedback data. Feedback data includes a total buffer size of the relay station and a number of user devices.Type: ApplicationFiled: June 22, 2010Publication date: December 22, 2011Applicant: FutureWei Technologies, Inc.Inventors: Aaron Callard, Gamini Senarath, Israfil Bahceci
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FREQUENCY DIVISION DUPLEXING AND HALF DUPLEX FREQUENCY DIVISION DUPLEXING IN MULTIHOP RELAY NETWORKS
Publication number: 20110188443Abstract: In a method of operating a relay station in a multihop wireless relay network, the relay station in communication with a superordinate station and a subordinate station: a downlink transmission from the superordinate station is received at a first carrier frequency; an uplink transmission from the subordinate station is received at a second carrier frequency; a downlink transmission to the subordinate station is transmitted at the first carrier frequency; and an uplink transmission to the superordinate station is transmitted at the second carrier frequency.Type: ApplicationFiled: September 3, 2010Publication date: August 4, 2011Inventors: Israfil Bahceci, Nimal Senerath, Hang Zhang, Peiying Zhu, Derek Yu, Wen Tong -
Publication number: 20110177821Abstract: In accordance with an embodiment, a method of operating a base station configured to operate with user devices includes scheduling a first user device in a first slot, scheduling the first user device for at least one further slot, and transmitting an assignment for the at least one further slot to the first user device. The first slot has a first resource block (RB) and a first transmission time interval (TTI) and the at least one further slot has the first RB and a second TTI.Type: ApplicationFiled: January 20, 2010Publication date: July 21, 2011Applicant: FutureWei Technologies, Inc.Inventors: Gamini Senarath, Israfil Bahceci, Peiying Zhu
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Publication number: 20110136533Abstract: A method of operating base station includes determining a first transmit power of a user equipment (UE), which includes determining a serving base station receive power, determining a path loss of the UE to the base station, determining a downlink signal to noise and interference ratio (SNIR) at the UE, and forming the first UE transmit power. Forming the first UE transmit power comprises summing the serving base station receive power, the path loss of the UE to the base station and the downlink SNIR. The method further includes instructing the UE to transmit at the first UE transmit power.Type: ApplicationFiled: December 8, 2009Publication date: June 9, 2011Applicant: FutureWei TechnologiesInventors: Gamini Senarath, Israfil Bahceci, Peiying Zhu, Aaron Collard
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Publication number: 20110134812Abstract: In accordance with an embodiment, a method of operating a base station configured to operate with user devices includes scheduling transmission for the user devices. Scheduling transmission includes determining a first fading metric for at least one user device from the at least one user device to the base station, determining at a second fading metric for the at least one user device from the at least one user device to at least one other base station, and determining a priority metric for the at least one user device based on the first and second fading metrics. The priority metric is configured to assign a higher priority to a user device with a first fading metric indicating an up-fade and the second fading metric indicating a down-fade. The method further includes transmitting a transmission schedule to the at least one user device based the priority metric.Type: ApplicationFiled: December 8, 2009Publication date: June 9, 2011Applicant: FutureWel Technologies, Inc.Inventors: Gamini Senarath, Israfil Bahceci, Peiying Zhu, Aaron Collard
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Publication number: 20110038284Abstract: A relay station is provided for use in a wireless communication system. The wireless communication system includes a plurality of base stations communicatively coupled to a backhaul network and at least one mobile station. The relay station is shared by at least a first base station and a second base station. The relay station includes a transceiver, a controller and relay circuitry. The transceiver transmits signals to and receives signals both base stations and a mobile station. Signals transmitted to the base stations include a single preamble, MAP and FCH. The controller is electrically connected to the transceiver and is operable to measure a signal quality of the mobile station while connected to the first base station. The relay circuitry is electrically connected to the controller and is operable to conduct a phased handoff from the first base station to the second base station based on the signal quality.Type: ApplicationFiled: April 21, 2009Publication date: February 17, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal Gamini Senarath, Israfil Bahceci, Mo-Han Fong, Peiying Zhu, Derek Yu, Hang Zhang, Wen Tong, Sheng Sun
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Publication number: 20100317364Abstract: A system and method for uplink inter cell interference coordination and multi-user multiple input, multiple output in a wireless access system are provided. A method for providing uplink inter cell interference coordination in a wireless access system includes categorizing users the wireless access system, selecting a resource allocation plan based on the categorized users, allocating resources to the users in the wireless access system based on the selected resource allocation plan, and receiving transmissions from the users.Type: ApplicationFiled: June 11, 2010Publication date: December 16, 2010Applicant: FutureWei Technologies, Inc.Inventors: Hang Zhang, Jia Ming, Israfil Bahceci