Patents by Inventor Sridhar RAMANUJAM
Sridhar RAMANUJAM 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).
-
Publication number: 20240147572Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a user equipment (UE) or component thereof. The apparatus may be configured to transmit to a base station a first request to transmit data in a buffer. The apparatus may be further configured to transmit to the base station a second request to transmit the data in the buffer in absence of a grant in response to the first transmit request. The apparatus may be further configured to remain awake for at least a portion of a scheduled discontinuous reception (DRX) sleep state following the transmission of the second request.Type: ApplicationFiled: March 10, 2021Publication date: May 2, 2024Inventors: Shweta Jaikrishna DASS, Krishna Chaitanya BELLAM, Shailesh MAHESHWARI, Vishal DALMIYA, Gang Andy XIAO, Vaishakh RAO, Sathish Kumar NALLAMANTI, Leena ZACHARIAS, Touseef KHAN, Sridhar RAMANUJAM, Nan ZHANG, Xiaojian LONG, Ajeet KUMAR
-
Patent number: 11212149Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.Type: GrantFiled: December 6, 2019Date of Patent: December 28, 2021Assignee: QUALCOMM IncorporatedInventors: Sridhar Ramanujam, Xiaoxia Zhang, Taesang Yoo
-
Patent number: 10757665Abstract: The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe.Type: GrantFiled: February 6, 2019Date of Patent: August 25, 2020Assignee: QUALCOMM IncorporatedInventors: Sridhar Ramanujam, Xiaoxia Zhang, Tao Luo, Juan Montojo
-
Publication number: 20200119959Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.Type: ApplicationFiled: December 6, 2019Publication date: April 16, 2020Inventors: Sridhar RAMANUJAM, Xiaoxia Zhang, Taesang Yoo
-
Patent number: 10531473Abstract: The disclosure provides for detecting interference in wireless communications. A wireless devices may receive an interfering signal on a portion of unlicensed spectrum. The wireless device may perform cyclic autocorrelation on the interfering signal to determine one or both of a cyclic prefix length and a symbol period. The wireless device may determine a radio access technology of the interfering signal based on one or both of the cyclic prefix length and the symbol period. In an aspect, the wireless device may further transmit an interference report including information regarding the interfering signal including the cyclic prefix length, symbol period, identified radio access technology, or packet length.Type: GrantFiled: September 23, 2016Date of Patent: January 7, 2020Assignee: QUALCOMM IncorporatedInventors: Srinivas Yerramalli, Arumugam Chendamarai Kannan, Jing Lei, Sridhar Ramanujam, Yongbin Wei
-
Patent number: 10505772Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.Type: GrantFiled: June 5, 2017Date of Patent: December 10, 2019Assignee: QUALCOMM IncorporatedInventors: Sridhar Ramanujam, Xiaoxia Zhang, Taesang Yoo
-
Patent number: 10356734Abstract: The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe.Type: GrantFiled: November 28, 2017Date of Patent: July 16, 2019Assignee: QUALCOMM IncorporatedInventors: Sridhar Ramanujam, Xiaoxia Zhang, Tao Luo, Juan Montojo
-
Publication number: 20190174441Abstract: The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe.Type: ApplicationFiled: February 6, 2019Publication date: June 6, 2019Inventors: Sridhar RAMANUJAM, Xiaoxia ZHANG, Tao LUO, Juan MONTOJO
-
Publication number: 20180152905Abstract: The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe.Type: ApplicationFiled: November 28, 2017Publication date: May 31, 2018Inventors: Sridhar RAMANUJAM, Xiaoxia ZHANG, Tao LUO, Juan MONTOJO
-
Publication number: 20180115448Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.Type: ApplicationFiled: June 5, 2017Publication date: April 26, 2018Inventors: Sridhar Ramanujam, Xiaoxia Zhang, Taesang Yoo
-
Publication number: 20170094672Abstract: The disclosure provides for detecting interference in wireless communications. A wireless devices may receive an interfering signal on a portion of unlicensed spectrum. The wireless device may perform cyclic autocorrelation on the interfering signal to determine one or both of a cyclic prefix length and a symbol period. The wireless device may determine a radio access technology of the interfering signal based on one or both of the cyclic prefix length and the symbol period. In an aspect, the wireless device may further transmit an interference report including information regarding the interfering signal including the cyclic prefix length, symbol period, identified radio access technology, or packet length.Type: ApplicationFiled: September 23, 2016Publication date: March 30, 2017Inventors: Srinivas YERRAMALLI, Arumugam CHENDAMARAI KANNAN, Jing LEI, Sridhar RAMANUJAM, Yongbin WEI
-
Patent number: 9301161Abstract: A method and apparatus for determining available downlink bandwidth are described. The described aspects may include estimating an available link capacity of a cell for a user equipment. The described aspects may include estimating an available fraction of cell resources for the user equipment. The described aspects may include estimating available bandwidth of the cell for the user equipment as a function of the estimated available link capacity and the estimated available fraction of cell resources. Available bandwidth may be estimated for a cell in a Universal Mobile Telecommunications System (UMTS) system when the user equipment is in an idle mode and/or a connected mode. Available bandwidth may be estimated for a cell in a Long Term Evolution (LTE) system when the user equipment is in an idle mode and/or a connected mode.Type: GrantFiled: April 26, 2013Date of Patent: March 29, 2016Assignee: QUALCOMM IncorporatedInventors: Pavan Kumar Vitthaladevuni, Arnaud Meylan, Sharad Deepak Sambhwani, Brandon Allen Burdge, Sridhar Ramanujam, Siddharth Mohan
-
Publication number: 20140029455Abstract: A method and apparatus for determining available downlink bandwidth are described. The described aspects may include estimating an available link capacity of a cell for a user equipment. The described aspects may include estimating an available fraction of cell resources for the user equipment. The described aspects may include estimating available bandwidth of the cell for the user equipment as a function of the estimated available link capacity and the estimated available fraction of cell resources. Available bandwidth may be estimated for a cell in a Universal Mobile Telecommunications System (UMTS) system when the user equipment is in an idle mode and/or a connected mode. Available bandwidth may be estimated for a cell in a Long Term Evolution (LTE) system when the user equipment is in an idle mode and/or a connected mode.Type: ApplicationFiled: April 26, 2013Publication date: January 30, 2014Applicant: QUALCOMM IncorporatedInventors: Pavan Kumar VITTHALADEVUNI, Arnaud MEYLAN, Sharad Deepak SAMBHWANI, Brandon Allen BURDGE, Sridhar RAMANUJAM, Siddharth MOHAN