Patents by Inventor Chalapathi Rao Emani
Chalapathi Rao Emani 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: 8059584Abstract: Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results is selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.Type: GrantFiled: February 12, 2008Date of Patent: November 15, 2011Assignee: QUALCOMM IncorporatedInventors: Da-shan Shiu, Thomas B Wilborn, Roland Reinhard Rick, Srinivasa Rao Nagaram, Chalapathi Rao Emani, Ramachandran Gurumoorthy, Jesus Chao, Steve Doerfler, Peter Ang, Srividya Kunisetti, Gwang-Hyun Gho, Thomas Nelson Bailey
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Publication number: 20080215573Abstract: Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results is selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.Type: ApplicationFiled: February 12, 2008Publication date: September 4, 2008Applicant: QUALCOMM INCORPORATEDInventors: Da-shan Shiu, Thomas B. Wilborn, Roland Rick, Srinivasa Rao Nagaram, Chalapathi Rao Emani, Ramachandran Gurumoorthy, Jesus Chao, Steve Doerfler, Peter Ang, Srividya Kunisetti, Gwang-Hyun Gho, Thomas Bailey
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Patent number: 7330452Abstract: Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results are selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.Type: GrantFiled: June 13, 2003Date of Patent: February 12, 2008Assignee: QUALCOMM IncorporatedInventors: Da-shan Shiu, Thomas B. Wilborn, Roland Rick, Srinivasa Rao Nagaram, Chalapathi Rao Emani, Ramachandran Gurumoorthy, Jesus Chao, Steve Doerfler, Peter Ang, Srividya Kunisetti, Gwang-Hyun Gho, Thomas Bailey
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Patent number: 7286801Abstract: For cell measurement, a wireless device categorizes cells whose identities are known to the device into multiple sets. The wireless device may obtain these cells from the system via signaling and/or detect these cells via searches. Different sets of cells may be associated with different levels of importance (e.g., for handoff), require different amounts of processing for measurements, and so on. Each set is associated with a particular measurement rate. Cells deemed to be more important (e.g., for handoff) are measured more frequently. Cells deemed to be less important and/or require more processing for measurements (e.g., cells with unknown timing) are measured less frequently. The wireless device performs searches and makes measurements for the cells in each set at the measurement rate selected for that set.Type: GrantFiled: September 21, 2004Date of Patent: October 23, 2007Assignee: QUALCOMM IncorporatedInventors: Messay Amerga, Chalapathi Rao Emani
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Patent number: 6856611Abstract: Various techniques are disclosed for unambiguously determining and tracking frame offset in asynchronous wireless communication user equipment. The user equipment determines the unambiguous connection frame number of a downlink channel. The equipment then determines frame timing information for neighbor cells. The frame timing information for the primary common control physical channel and uplink dedicated physical channels is determined. The frame timing is determined as a coarse resolution frame offset in conjunction with a fine resolution chip offset. The frame numbering information for the uplink and downlink dedicated physical channels and the primary common control physical channel is also determined. Then the frame number and timing information is updated using a counter accurate to one chip resolution. The frame offset is updated if the number of chips underflows or overflows a predetermined window. Frame timing may be updated by updating only the fine chip offset or may be completely determined.Type: GrantFiled: April 11, 2003Date of Patent: February 15, 2005Assignee: Qualcomm IncorporatedInventors: Siddhartha Ray Chaudhuri, Chih-Ping Hsu, Chalapathi Rao Emani, Jeremy H. Lin, Gurdeep Singh
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Publication number: 20040252656Abstract: Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results are selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.Type: ApplicationFiled: June 13, 2003Publication date: December 16, 2004Inventors: Da-shan Shiu, Thomas B. Wilborn, Roland Rick, Srinivasa Rao Nagaram, Chalapathi Rao Emani, Ramachandran Gurumoorthy, Jesus Chao, Steve Doerfler, Peter Ang, Srividya Kunisetti, Gwang-Hyun Gho, Thomas Bailey
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Publication number: 20040017777Abstract: Various techniques are disclosed for unambiguously determining and tracking frame offset in asynchronous wireless communication user equipment. The user equipment determines the unambiguous connection frame number of a downlink channel. The equipment then determines frame timing information for neighbor cells. The frame timing information for the primary common control physical channel and uplink dedicated physical channels is determined. The frame timing is determined as a coarse resolution frame offset in conjunction with a fine resolution chip offset. The frame numbering information for the uplink and downlink dedicated physical channels and the primary common control physical channel is also determined. Then the frame number and timing information is updated using a counter accurate to one chip resolution. The frame offset is updated if the number of chips underflows or overflows a predetermined window. Frame timing may be updated by updating only the fine chip offset or may be completely determined.Type: ApplicationFiled: April 11, 2003Publication date: January 29, 2004Inventors: Siddhartha Ray Chaudhuri, Chih-Ping Hsu, Chalapathi Rao Emani, Jeremy H. Lin, Gurdeep Singh