Inventor

Sampath Rangarajan

Inventor

Bridgewater, NJ, US

Overview

2000–2021

Patent span

Electricity

Primary field (CPC H)

Patents· 185 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Lprimary

H04LTransmission of digital information, e.g. telegraphic communication30%

H04WWireless communication networks27%

H04BTransmission23%

G06FElectric digital data processing2%

G06KGraphical data reading2%

H01QAntennas, i.e. radio aerials2%

H04JMultiplex communication2%

G01SRadio direction-finding2%

A63FCard, board, or roulette games1%

H04NPictorial communication, e.g. television1%

PatentTitleYear

11,048,890Walk-through checkout station2021 10,852,415Backscatter-aided navigation system2020 10,852,414In-home inventory and location system2020 10,852,416In-store interaction and location system for interfacing users with products2020 10,852,413Tagging objects in indoor spaces using ambient, distributed backscatter2020 10,631,272Methods and systems for conveying scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system2020 10,616,880Signalling for coordinated multi-point transmission and reception (CoMP)2020 10,594,372Codebook construction2020 10,582,529Speculative scheduling in mobile networks2020 10,575,319Two-stage algorithm for uplink CoMP2020 10,574,535Interference topology inference to enhance performance of LTE unlicensed networks2020 10,477,472Optimizing energy efficiency over energy-harvesting LTE cellular networks2019 10,470,243Implementing wireless communication networks using unmanned aerial vehicles2019 10,469,188System and method for enabling interference-awareness for LTE operation in unlicensed spectrum2019 10,455,636Link packing in mmWave networks2019 10,410,025Product checkout and interest detection in retail environment using radio-frequency identification2019 10,405,373Distributed core architecture for implementing wireless communication networks2019 10,405,209Blue-printing interference for LTE access in unlicensed spectrum2019 10,346,655Battery-free touch-aware user input using RFID tags2019 10,334,616Analysis and evaluation of a practical downlink multiuser MIMO scheduler over LTE advanced massive MIMO systems2019 10,331,493Systems and methods for distributed assignment of task identifiers2019 10,332,398Smart parking facility management by using wireless communication techniques to perform stationary and moving vehicle detection2019 10,298,671Randomization function and its application in load balancing2019 10,296,394Consistent hashing2019 10,291,370Dual connectivity in heterogeneous cellular networks2019 10,292,054Enabling technologies for LTE on unlicensed spectrum2019 10,292,059Managing analog beams in mmWave networks2019 10,250,310Codebook construction2019 10,230,507Signalling in coordinated multi-point transmission and reception (CoMP)2019 10,224,986Signalling in coordinated multi-point transmission and reception (CoMP)2019 10,206,169Energy efficient downlink scheduling in LTE-advanced networks2019 10,122,547Enabling high-bandwidth, responsive mobile applications in LTE networks2018 10,091,114Asynchronous access and synchronous transmission for coexistence of wireless standards2018 10,056,947Signalling in coordinated multi-point transmission and reception (CoMP)2018 10,021,172Software driven long-term-evolution core network for mobile access2018 10,021,684MU-MIMO in mmwave systems2018 10,020,859Channel feedback for vertical and full-dimensional beamforming2018 9,936,414Enabling long-term-evolution/wifi coexistence2018 9,906,340'Standards compliant coordinated multi-point scheduling over LTE heterogeneous wireless networks'2018 9,888,469'Signalling for coordinated multi-point transmission and reception (CoMP)'2018 9,847,818Channel state information (CSI) feedback and subsampling2017 9,813,922'System and method for resource management in heterogeneous wireless networks'2017 9,813,995'Interference cancellation'2017 9,755,716'Codebook construction'2017 9,736,785'Degrees of freedom in multicell wireless systems with full-duplex base stations using interference alignment and methods for enabling full-duplex with half duplex clients'2017 9,722,720'Scaling wireless full duplex in multi-cell networks with spatial interference alignment'2017 9,723,567'Interference cancellation'2017 9,722,725'System and method for resource management in heterogeneous wireless networks'2017 9,723,566'Interference cancellation'2017 9,723,532'Intelligent WiFi-offloading for next-generation mobile networks'2017 9,654,174'Method and apparatus for managing a power line communication network in multi-flow environments'2017 9,537,587'Efficient large-scale multiple input multiple output communications'2017 9,538,415'Enhanced interference management in heterogeneous wireless networks'2017 9,532,257'Enhancement of download multi-user multiple-input multiple-output wireless communications'2016 9,521,560'Multicell beamforming system and methods for OFDMA small-cell networks'2016 9,450,654'Multi-user multiple input multiple output (MIMO) communication with distributed antenna systems in wireless networks'2016 9,450,657'Low-complexity precoder design for large-scale MIMO communication systems'2016 9,450,655'Two-stage precoding and user grouping for large scale multiple-input multiple-output (MIMO) systems'2016 9,420,493'Exploiting cell dormancy and load balancing in LTE HetNets'2016 9,413,474'Efficient large-scale multiple input multiple output communications'2016 9,385,899'Codebook construction'2016 9,369,391'Flow management for data streams over cellular networks'2016 9,337,966'Carrier aggregation'2016 9,337,906'Feedback and scheduling for coordinated multi-point (CoMP) joint transmission (JT) in orthogonal frequency division multiple access (OFDMA)'2016 9,338,519'Method for multicast video delivery for 4G cellular networks'2016 9,338,693'Scheduling framework for adaptive video delivery over cellular networks'2016 9,191,962'Multi-user scheduling in cellular uplinks'2015 9,184,902'Interference cancellation for full-duplex communications'2015 9,161,205'Route optimization at a packet data switch node'2015 9,148,818'Coordinated multiple point transmission and reception'2015 9,144,076'User pairing and resource allocation for downlink multiuser multi-input-multi-output in long term evolution advanced systems'2015 9,137,788'Multiple-input multiple-output wireless communications with full duplex radios'2015 9,124,319'Multi-user multiple input multiple output wireless communications'2015 9,125,047'Cloud-based radio access network for small cells'2015 9,100,946'Scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system'2015 9,089,771'Method and apparatus for synchronizing assets across distributed systems'2015 9,094,145'Coordinated multipoint transmission and reception (CoMP)'2015 9,071,471'Low-complexity estimation of QAM symbols and constellations'2015 9,066,351'Tailoring wireless transmission strategies to user profiles'2015 9,055,456'Remote virtualization of a cellular basestation'2015 9,055,561'MU-MIMO-OFDMA systems and methods for servicing overlapping co-scheduled users'2015 9,042,937'Uplink power control'2015 9,025,692'Precoding selection for retransmission in uplink MIMO hybrid ARQ'2015 9,020,061'Codebook construction'2015 9,014,290'Throughput enhancement through repercussive coding in MIMO systems'2015 8,976,696'Methods and systems for integrating batch scheduling with external beamforming'2015 8,948,120'Exploiting hybrid-channel information for downlink multi-user scheduling'2015 8,942,712'Dynamic and configuration based fractional frequency reuse for uneven load distributions'2015 8,923,907'Scalable network MIMO for wireless networks'2014 8,923,239'Method and system for customizable flow management in a cellular basestation'2014 8,917,648'Precoder design for physical layer multicasting'2014 8,918,055'Beamforming'2014 8,902,857'Method of performing handoffs in wireless local area networks'2014 8,897,725'Beamforming'2014 8,891,529'Coordinated multipoint transmission and reception (CoMP)'2014 8,891,677'Power scaling for retransmissions in uplink MIMO hybrid ARQ'2014 8,891,604'Coordinated multi-point transmission'2014 8,891,391'Resource allocation in mimo multi-cellular networks via submodular optimization'2014 8,879,433'Method for a canceling self interference signal using active noise cancellation in the air for full duplex simultaneous (in time) and overlapping (in space) wireless transmission and reception on the same frequency band'2014 8,873,482'Method and system for virtualizing a cellular basestation'2014 8,874,125'Radio access network sharing'2014 8,873,426'Wireless network connectivity in data centers'2014 8,873,441'Method for LTE downlink scheduling with MIMO'2014 8,837,332'Method for a canceling self interference signal using passive noise cancellation for full-duplex simultaneous (in time) and overlapping (in space) wireless transmission and reception on the same frequency band'2014 8,798,011'Enhancement of download multi-user multiple-input multiple-output wireless communications'2014 8,780,849'Methods and systems for allocation of macro cell resources in a distributed femto cell network and a distributed relay station network'2014 8,767,888'Efficient square-root free 2 symbol max-log receiver'2014 8,767,553'Dynamic resource partitioning for long-term fairness to non-elastic traffic on a cellular basestation'2014 8,767,665'Feed-forward control signaling and decoding schemes'2014 8,761,677'Multiple stage hybrid spectrum sensing methods and systems for cognitive radio'2014 8,761,129'Enhancement of download multi-user multiple-input multiple-output wireless communications'2014 8,750,358'Method for improving multiuser MIMO downlink transmissions'2014 8,724,573'Resource allocation in 4G MIMO cellular uplinks'2014 8,724,605'Multicast video and data delivery with beamforming antennas in indoor wireless networks'2014 8,718,156'Indexing methods and systems'2014 8,717,922'Multitaper spectrum sensing systems and methods'2014 8,705,392'MU-MIMO-OFDMA multi-rank CQI and precoder signaling schemes'2014 8,699,621'Precoding selection for retransmission in uplink MIMO hybrid ARQ'2014 8,700,047'Method and system for customizable flow management in a cellular basestation'2014 8,687,527'Low complexity link adaptatation for LTE/LTE-A uplink with a turbo receiver'2014 8,688,520'Opportunistic alignment of advertisement delivery with cellular basestation overloads'2014 8,660,077'Method and systems for conveying scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system'2014 8,660,598'Systems and methods for prioritizing beams to enable efficient determination of suitable communication links'2014 8,660,202'Robust precoder and receiver filter design for Gaussian interference channel'2014 8,660,030'High performance and low complexity scheduling method for adaptive resource usage in OFDMA wireless relay networks'2014 8,654,663'MU-MIMO-OFDMA systems and methods for multi-rank CQI computation and precoder selection'2014 8,644,180'MU-MIMO-OFDMA methods and systems for signaling multi-rank CQIs and precoders'2014 8,625,695'Feed-forward control signaling and decoding schemes'2014 8,615,047'Beamforming systems and methods for link layer multicasting'2013 8,611,917'LTE and LTE-advanced UL power control'2013 8,599,951'Feed-forward control signaling and decoding schemes'2013 8,597,124'Apparatus and method for fair message exchanges in distributed multi-player games'2013 8,594,248'Reverse indexing methods and systems'2013 8,589,561'Session level technique for improving web browsing performance on low speed links'2013 8,588,750'Method and apparatus for providing interactive services to users using unicast and broadcast wireless networks'2013 8,537,928'Channel estimation methods and systems based on power measurement at receivers'2013 8,537,737'Scalable video multicast with non-overlapping beamforming antennas'2013 8,537,693'Multicast scheduling systems and methods for leveraging cooperation gains in relay networks'2013 8,532,051'Method and systems for conveying scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system'2013 8,520,764'Link layer multicasting systems and methods'2013 8,519,888'Wireless multicasting with beamforming antennas'2013 8,520,762'Robust linear precoder designs for multi-cell downlink transmission'2013 8,521,173'Methods and systems for dynamic and configuration based fractional frequency reuse for uneven load distributions'2013 8,520,763'Robust linear precoder designs for multi-cell downlink transmission'2013 8,510,433'Beam combination methods and systems for adapting communication links to varying channel conditions'2013 8,503,418'Method and system for accountable resource allocation in cellular and broadband networks'2013 8,503,554'Selective joint demodulation'2013 8,494,459'Wideband codebook construction and applications'2013 8,472,554'Signaling of mixture combination sets'2013 8,432,989'Max-log stack decoder'2013 8,385,454'Robust linear precoder designs for multi-cell downlink transmission'2013 8,385,462'Subband indexing methods and systems'2013 8,374,135'Methods and systems for location-based allocation of macro cell resources'2013 8,374,101'Multicast with joint layer resource allocation in broadband wireless networks'2013 8,351,948'Method and system for customizable flow management in a cellular basestation'2013 8,346,176'Sequential sensing scheme for cognitive radio'2013 8,345,545'Methods and systems for rate matching and rate shaping in a wireless network'2013 8,335,534'Distributed inter-cell interference mitigation in OFDMA multi-carrier wireless data networks'2012 8,311,005'Methods and systems for allocation of macro cell resources in a distributed femto cell network and a distributed relay station network'2012 8,310,975'Optimal beam scheduling for multicasting in wireless networks'2012 8,259,831'Subband indexing methods and systems'2012 8,141,120'Adaptive scheduling of streaming video over wireless networks'2012 8,098,609'Integrated scheduling of unicast and multicast traffic in relay-enabled wireless networks'2012 8,068,821'Method and apparatus for providing content to users using unicast and broadcast wireless networks'2011 8,041,780'Method and apparatus for dynamically pushing content over wireless networks'2011 8,023,455'Scheduling in multi-cell multi-carrier wireless systems'2011 8,020,029'Method and apparatus for rendering game assets in distributed systems'2011 7,961,683'Active session mobility solution for point-to-point protocol'2011 7,921,226'User specific request redirection in a content delivery network'2011 7,894,407'Method and apparatus for seamless roaming for wireless networks'2011 7,821,995'Active session mobility solution for radio link protocol'2010 7,801,957'Apparatus and method for fair message exchanges in distributed multi-player games'2010 7,756,042'Bandwidth guaranteed provisioning in network-based mobile virtual private network (VPN) services'2010 7,584,248'Apparatus and method for fair message exchanges in distributed multi-player games'2009 7,478,427'Method and apparatus for providing adaptive VPN to enable different security levels in virtual private networks (VPNs)'2009 7,400,611'Discovery of border gateway protocol (BGP) multi-protocol label switching (MPLS) virtual private networks (VPNs)'2008 7,187,648'Redundancy in packet routing devices'2007 7,058,424'Method and apparatus for interconnecting wireless and wireline networks'2006 6,510,439'Method and system for consistent update and retrieval of document in a WWW server'2003 6,434,618'Programmable network element for packet-switched computer network'2002 6,389,462'Method and apparatus for transparently directing requests for web objects to proxy caches'2002 6,314,465'Method and apparatus for load sharing on a wide area network'2001 6,161,193'Methods and apparatus for process replication/recovery in a distributed system'2000 6,138,152'Technique for effectively serving information objects through a communication network'2000 6,070,191'Data distribution techniques for load-balanced fault-tolerant web access'2000

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2000–2021Based in Bridgewater, NJ, US· patent location history

2011–2021Patents assigned to NEC LAB AMERICA INC (147)· patent assignee history

2011–2015Patents assigned to RANGARAJAN SAMPATH (72)· patent assignee history

2012–2015Patents assigned to PRASAD NARAYAN (33)· patent assignee history

2012–2015Patents assigned to KHOJASTEPOUR MOHAMMAD A (20)· patent assignee history

2013Based in Brigewater, NJ, US· patent location history

2014–2016Based in Princeton, NJ, US· patent location history

2014Based in Bridgwater, NJ, US· patent location history

2016–2021Patents assigned to NEC CORP (65)· patent assignee history

2020Based in Brdgewater, NJ, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NEC LAB AMERICA INC	147	2011–2021
RANGARAJAN SAMPATHself	72	2011–2015
NEC CORP	65	2016–2021
PRASAD NARAYAN	33	2012–2015
KHOJASTEPOUR MOHAMMAD A	20	2012–2015

Locations

Location	Patents	Span
Bridgewater, New Jersey, US	175	2000–2021
Princeton, New Jersey, US	7	2014–2016
Brdgewater, New Jersey, US	1	2020
Bridgwater, New Jersey, US	1	2014
Brigewater, New Jersey, US	1	2013