Inventor

Liwen Chu

Inventor

San Ramon, CA, US

Overview

2010–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 233 as inventor

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

H04Wprimary

H04WWireless communication networks44%

H04LTransmission of digital information, e.g. telegraphic communication31%

H04BTransmission13%

Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use5%

G01SRadio direction-finding4%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications2%

H04JMultiplex communication1%

H04NPictorial communication, e.g. television0%

E21BEarth or rock drilling0%

G06FElectric digital data processing0%

PatentTitleYear

10,880,855Null data packet (NDP) ranging measurement feedback2020 10,873,909Frequency division multiple access (FDMA) support for wakeup radio (WUR) operation2020 10,873,878Acknowledgement of transmissions in a wireless local area network2020 10,863,502Methods and apparatus for carrying out backoff operations2020 10,862,549Sub-channel allocation in orthogonal frequency division multiplex WLAN2020 10,856,349Acknowledgment data unit for multiple uplink data units2020 10,856,228Systems and methods for transmitting a wake-up request frame to lower power devices in a wireless network2020 10,849,024WiFi operation with channel aggregation2020 10,848,275Block acknowledgment operation2020 10,849,080Trigger MPDU for client-selectable transmit power2020 10,848,288Multi-user null data packet (NDP) ranging2020 10,834,639WiFi operation with channel aggregation2020 10,827,428Systems and methods for managing basic service sets through wakeup frames in a low power wireless network2020 10,826,569Sub-channel allocation in orthogonal frequency division multiplex WLAN2020 10,812,244Acknowledgment of uplink orthogonal frequency division multiple access transmission2020 10,805,051WiFi channel aggregation2020 10,790,937Hybrid automatic repeat request for wireless local area network2020 10,791,516Methods and apparatus for allocating physical resources of a wireless network to client devices2020 10,771,498Validating de-authentication requests2020 10,771,126Uplink multi-user multiple input multiple output for wireless local area network2020 10,764,874Trigger frame format for orthogonal frequency division multiple access (OFDMA) communication2020 10,764,855Synchronizing clocks in a wireless network2020 10,764,826Low power wakeup in a wireless network2020 10,763,997Action frame to indicate change in block acknowledgment procedure2020 10,742,285Explicit multiuser beamforming training in a wireless local area network2020 10,735,163Secure ranging measurement2020 10,727,912Uplink multi-user multiple input multiple output for wireless local area network2020 10,721,026Block ACK frame with flow control2020 10,712,422Error recovery in null data packet (NDP) ranging2020 10,708,892Resource request for uplink transmission2020 10,707,928Group acknowledgement for multiple user communication in a wireless local area network2020 10,694,523Spatial reuse transmissions in wireless local area networks (WLANs)2020 10,694,546Media access control for duplex transmissions in wireless local area networks2020 10,681,578Method and apparatus for performing a fine timing measurement in a wireless network2020 10,681,625Single-user acknowledgement options for wireless communication in a multi-user environment2020 10,673,547Method and apparatus for communication2020 10,667,175Systems and methods for segmentation and reassembly of data frames in 802.11 wireless local area networks2020 10,656,256Ranging measurements in wireless communication systems2020 10,659,189Control field for resource request with multiple formulas for use in a wireless communication network2020 10,660,105Systems and methods for multi-user operation with duplex medium access control2020 10,641,887Null data packet (NDP) ranging with unassociated stations2020 10,631,187Method and apparatus for ranging2020 10,623,533Methods and apparatus for generation of physical layer protocol data units2020 10,624,131Channel access for simultaneous uplink transmissions by multiple communication devices2020 10,602,430Multiple basic service set support2020 10,595,338Methods and apparatus for adaptive channel access2020 10,595,361Method and apparatus for retransmission2020 10,587,375Downlink signaling in a high efficiency wireless local area network (WLAN)2020 10,588,165Methods and devices for communicating in a wireless network with multiple virtual access points2020 10,581,580Acknowledgement of transmissions in a wireless local area network2020 10,581,627Broadcast and multicast in a wireless communication system in a wireless communication network2020 10,574,418Determining channel availability for orthogonal frequency division multiple access operation2020 10,567,996Systems and methods for segmentation and reassembly of data frames in 802.11 wireless local area networks2020 10,567,127Signal fields in a high efficiency wireless local area network (WLAN) data unit2020 10,560,164Group addressing for beamforming training2020 10,560,158Triggered uplink transmissions in wireless local area networks2020 10,555,245Operating mode notification for wireless communication networks2020 10,554,351Methods and systems for enabling communications from a station to an access point using an orthogonal frequency division multiple access (OFDMA) communication scheme2020 10,554,251Low power wake up radio synchronization with low power antenna2020 10,524,290Method and apparatus for uplink orthogonal frequency division multiple access communication in a WLAN2019 10,517,094Acknowledgement for multiple user communication in a WLAN2019 10,511,471Sounding and tone block allocation for orthogonal frequency division multiple access (OFDMA) in wireless local area networks2019 10,498,670Power restriction and backoff control for wireless devices2019 10,492,221Methods and apparatus for protecting transmissions in a wireless communication network2019 10,484,980Link layer service platform2019 10,477,452Spatial reuse in 60 GHZ wireless networks2019 10,469,210Acknowledgment data unit for data unit fragment2019 10,470,185Acknowledgement for multiple user communication in a WLAN2019 10,454,798Multi-user data unit arrival time adjustment2019 10,454,626Transmitter defragmentation for data unit fragments2019 10,440,598Methods and apparatus for clock drift mitigation with snoop-based ranging2019 10,433,309Orthogonal frequency division multiple access for wireless local area network2019 10,425,908Methods and apparatus for enabling spontaneous location determination in a scheduled wireless communication environment2019 10,404,653Changing a basic service set color identifier2019 10,405,265Controlling access to a shared communication medium in a wireless communication network2019 10,396,963Frame formats for multi-user acknowledgment information2019 10,390,328Beamforming training in orthogonal frequency division multiple access (OFDMA) communication systems2019 10,383,091Transmission opportunity ownership transfer and extension in a wireless local area network (WLAN)2019 10,375,695Spatial reuse transmissions in wireless local area networks (WLANS)2019 10,375,679Trigger frame format for orthogonal frequency division multiple access (OFDMA) communication2019 10,367,614Method and apparatus for MU resource request2019 10,362,152Trigger-based single user uplink transmission2019 10,356,815Clear channel assessment for co-located wireless networks2019 10,349,413Orthogonal frequency division multiple access for wireless local area network2019 10,334,571Trigger frame format for orthogonal frequency division multiple access (OFDMA) communication2019 10,320,690Methods and apparatus for range measurement2019 10,314,025Systems and methods for performing media access control consideration for multi-user transmission2019 10,313,923Acknowledgement of transmissions in a wireless local area network2019 10,306,704Method and apparatus for retransmission2019 10,305,659Uplink multi-user transmission2019 10,306,603Resource request for uplink multi-user transmission2019 10,298,370Response rules of trigger frame2019 10,285,202Channel access for simultaneous uplink transmissions by multiple communication devices2019 10,278,224Acknowledgment data unit for multiple uplink data units2019 10,277,376Acknowledgement of transmissions in a wireless local area network2019 10,263,738Downlink signaling in a high efficiency wireless local area network (WLAN)2019 10,263,735Tone block allocation for orthogonal frequency division multiple access data unit2019 10,264,544Station selection for null data packet (NDP) ranging2019 10,256,961Acknowledgment of uplink orthogonal frequency division multiple access transmission2019 10,257,859Method and apparatus for clear channel assessment2019 10,257,328Method and apparatus for control frame extension2019 10,257,806Medium access control for multi-channel OFDM in a wireless local area network2019 10,251,065Methods and apparatus for interference aware spatial reuse2019 10,243,711Carrier frequency offset estimation2019 10,244,536Method and apparatus for determining whether a secondary channel is idle2019 10,237,891Multiple basic service set support2019 10,231,148Signaling data unit format parameters for multi-user transmissions2019 10,225,338Peer to peer ranging exchange2019 10,219,162Interference suppression or cancellation in collocated receivers2019 10,219,274Channel bonding operations in wireless communications2019 10,212,730Partial association identifier (AID) length change notification2019 10,201,009Methods and apparatus for protecting transmissions in a wireless communication network2019 10,194,268Methods and apparatus for range measurement2019 10,194,385Determining multi-user or single user transmission for access point acknowledgement in a multi-user environment2019 10,187,497Systems and methods for performing data frame configuration on the physical layer for high-data rate wireless local area networks (WLANS)2019 10,187,905Target wake time (TWT) scheduling for orthogonal frequency-division multiple access (OFDMA) channelization2019 10,182,399Receive operation mode reporting and subsequent frame transmission based on transitions between power management modes2019 10,178,673Sounding for UL OFDMA transmission in WLAN2019 10,164,695Tone block and spatial stream allocation2018 10,153,857Orthogonal frequency division multiple access protection2018 10,148,412Methods and apparatus for clock drift mitigation2018 10,142,960Multi-user ranging with unassociated stations2018 10,135,582Systems and methods for introducing time diversity in WiFi transmissions2018 10,128,966Method and apparatus for communication2018 10,123,328Coexistence techniques for wide area network devices operating in unlicensed bands2018 10,111,185Backoff operation in connection with spatial reuse2018 10,103,923Sounding and tone block allocation for orthogonal frequency multiple access (OFDMA) in wireless local area networks2018 10,098,119Acknowledgement for multiple user communication in a WLAN2018 10,090,969Method and apparatus for transmission2018 10,082,557Methods and apparatus for frame filtering in snoop-based range measurements2018 10,080,222Orthogonal frequency division multiple access short frame format2018 10,079,628Signaling resource allocations in multi-user data units2018 10,075,318Sounding and tone block allocation for orthogonal frequency multiple access (OFDMA) in wireless local area networks2018 10,045,340Methods and apparatus for carrying out backoff operations2018 10,034,227Access point association using trigger-based uplink single user transmission2018 10,027,449Signal fields in a high efficiency wireless local area network (WLAN) data unit2018 10,021,224Trigger-based single user uplink transmission2018 10,014,917Triggered uplink transmissions in wireless local area networks2018 10,014,992Downlink signaling in a high efficiency wireless local area network (WLAN)2018 10,009,922Channel frame structures for high efficiency wireless LAN (HEW)2018 10,009,736Method and apparatus for performing joint transmissions in a wireless network2018 10,009,894Orthogonal frequency division multiple access for wireless local area network2018 10,009,781Method and apparatus for reducing retransmissions in local area networks2018 9,991,996Scheduling for orthogonal frequency division multiple access (OFDMA) transmissions in a wireless local area network (WLAN)2018 9,992,774Acknowledgment for multiple user communication in a WLAN2018 9,979,710Single SSID and dual-SSID enhancements2018 9,980,219Power efficient PS-Poll2018 9,980,268Orthogonal frequency division multiple access for wireless local area network2018 9,974,040Peer to peer ranging exchange2018 9,942,010Methods and systems for enabling communications from a station to an access point using an orthogonal frequency division multiple access (OFDMA) communication scheme2018 9,942,193Basic service set color identifier2018 9,935,794Carrier frequency offset estimation2018 9,913,208'System and method for providing schedule information used to snoop ranging exchanges between wireless devices'2018 9,912,388'Sub-channel allocation in orthogonal frequency division multiplex WLAN'2018 9,883,472'Methods and apparatus for beaconing within a wireless network based on an indication of distance'2018 9,876,614Hybrid automatic repeat request for wireless local area network2018 9,854,547Method and apparatus for synchronizing timing among devices in a wireless local area network (WLAN)2017 9,854,607Method and apparatus for performing dynamic clear channel assessent (CCA), and distinguishing wireless communications among different basic service sets2017 9,853,791Medium access protection and bandwidth negotiation in a wireless local area network2017 9,854,468Method and apparatus for estimating distance between network devices in a wireless network2017 9,847,988Single-SSID and dual-SSID enhancements2017 9,838,963Power efficient PS-Poll2017 9,826,434'Channel bandwidth indication and TXOP protection'2017 9,826,532'Orthogonal frequency division multiple access resource request'2017 9,825,678'Uplink multi-user multiple input multiple output for wireless local area network'2017 9,768,921'Downlink signaling in a high efficiency wireless local area network (WLAN)'2017 9,749,975'Systems and methods for implementing protected access based on a null data packet in a wireless network'2017 9,729,214'Group acknowledgement for multiple user communication in a wireless local area network'2017 9,717,086'Orthogonal frequency division multiple access for wireless local area network'2017 9,706,492'WGA STA power saving'2017 9,699,741'Method and apparatus for determining access control parameters for devices in a wireless communications network'2017 9,699,748'Uplink multi-user multiple input multiple output beamforming'2017 9,693,261'Method and apparatus for transmitting and receiving a packet with a traveling pilot in sub-1 GHz band via one or more space time streams based on capabilities information'2017 9,692,576'Methods and systems for transmitting hybrid beacon signals in WI-FI'2017 9,668,261'Method and apparatus for transmitting wireless network operational information'2017 9,661,523'Method and apparatus for dynamically adapting a transmission rate of a wireless communication device in a wireless network'2017 9,661,573'Multiple MAC addresses in a device'2017 9,629,127'Multiple user allocation signaling in a wireless communication network'2017 9,608,678'Method and apparatus for mitigating interference between wireless local area network (WLAN) communications and cellular communications'2017 9,596,060'Tone block allocation for orthogonal frequency division multiple access data unit'2017 9,554,324'Fast initial link setup (FILS) frame content for a wireless network'2017 9,544,847'Power efficient PS-Poll'2017 9,538,525'Robust unicast/broadcast/multicast communication protocol'2017 9,474,041'Method and apparatus for determining a location of a network device in a wireless network'2016 9,473,341'Sounding and tone block allocation for orthogonal frequency multiple access (OFDMA) in wireless local area networks'2016 9,462,538'High throughput features in 11S mesh networks'2016 9,450,743'Duplex mode enabling frame header'2016 9,407,347'Uplink multi-user multiple input multiple output beamforming'2016 9,402,238'Method and apparatus for controlling a transmit power level of a device in a wireless communications network'2016 9,363,175'Sub-1GHz MAC frame header compression'2016 9,326,234'Sub-1GHZ group power save'2016 9,237,546'Method and apparatus for determining a location of a network device in a wireless network'2016 9,237,525'WGA STA power saving'2016 9,232,472'Multiple MAC addresses in a device'2016 9,232,469'Early ending of frame reception'2016 9,215,055'Medium access protection and bandwidth negotiation in a wireless local area network'2015 9,191,889'Slot-based power save improvement'2015 9,179,394'Apparatus and method for coordinated sensing of wireless devices in a communication system'2015 9,166,660'Uplink multi-user multiple input multiple output beamforming'2015 9,020,422'Directional communication technique for systems with stations having multiple antennas or multiple antenna subassemblies'2015 9,014,105'80MHZ/160MHZ transmission opportunity (TXOP) protection in 802.11ac transmissions'2015 9,014,744'Method and apparatus for reducing power consumption in a wireless communication device'2015 8,995,257'VHT TDLS'2015 8,966,120'Method and system for providing a priority-based, low-collision distributed coordination function'2015 8,934,390'Enhancement of low power medium access STAs'2015 8,913,607'High throughput features in 11S mesh networks'2014 8,908,862'Method, system, and devices for fast session transfer of wireless devices from one frequency band to another'2014 8,625,570'Robust unicast/broadcast/multicast communication protocol'2014 8,619,808'Mechanism to update a NAV timer'2013 8,553,714'Unified contention based period'2013 8,488,558'PCP/STA capability handover in a wireless network'2013 8,483,192'Six-address scheme for multiple hop forwarding in wireless mesh networks'2013 8,437,333'Contention based period beamforming'2013 8,432,847'VTS frame format'2013 8,391,259'Broadcast/multicast collision free frame transmission'2013 8,374,080'High throughput features in 11S mesh networks'2013 8,369,257'Reliable and deterministic communication protocol'2013 8,364,187'Prioritized common subframe to provide better service to the overlapping areas in a community'2013 8,351,865'Transmit power control in 160 MHz BSS'2013 8,351,457'Method and system for providing a priority-based, low-collision distributed coordination function using a super-frame structure'2013 8,351,954'Personal independent basic service set cluster resource sharing'2013 8,284,775'Six-address scheme for multiple hop forwarding in wireless mesh networks'2012 8,285,297'Fair channel use in a wireless area network'2012 8,270,302'System and method for providing an adaptive value of TTL (time to live) for broadcast/multicast messages in a mesh network using a hybrid wireless mesh protocol'2012 8,249,033'Communication between overlapping WRAN cells working in different channels'2012 8,098,666'Method and system for providing a priority-based, low-collision distributed coordination function using a super-frame structure'2012 8,054,787'Apparatus and method for enhanced adaptive channel selection and subframe allocation in a communication system'2011 8,045,993'Fair channel use in a wireless area network'2011 8,031,681'Communication between overlapping WRAN cells working in different channels'2011 7,983,703'Prioritized common subframe to provide better service to the overlapping areas in a community'2011 7,961,693'Tunneled direct link setup collision resolution in a wireless local area network'2011 7,903,718'Enhanced 1-HOP dynamic frequency hopping communities'2011 7,826,422'Synchronized, semi-dynamic frequency hopping method for WRAN and other wireless networks'2010

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2010–2018Patents assigned to ST MICROELECTRONICS INC (53)· patent assignee history

2010–2015Based in San Jose, CA, US· patent location history

2012–2016Patents assigned to CHU LIWEN (27)· patent assignee history

2013–2020Based in San Ramon, CA, US· patent location history

2015–2020Patents assigned to MARVELL WORLD TRADE LTD (83)· patent assignee history

2016–2020Patents assigned to MARVELL INT LTD (81)· patent assignee history

2016Based in San Bernardino, CA, US· patent location history

2020Patents assigned to NXP USA INC (29)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MARVELL WORLD TRADE LTD	83	2015–2020
MARVELL INT LTD	81	2016–2020
ST MICROELECTRONICS INC	53	2010–2018
NXP USA INC	29	2020
CHU LIWENself	27	2012–2016

Locations

Location	Patents	Span
San Ramon, California, US	213	2013–2020
San Jose, California, US	19	2010–2015
San Bernardino, California, US	1	2016