Patents by Inventor Raja Banerjea
Raja Banerjea 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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Publication number: 20230421295Abstract: A preamble of physical layer (PHY) data unit includes a first legacy portion and a first non-legacy portion that follows the first legacy portion. The first non-legacy portion includes i) a first orthogonal frequency division multiplexing (OFDM) symbol that immediately follows the first legacy portion and that is modulated using binary phase shift keying (BPSK), and ii) a second OFDM symbol that immediately follows the first OFDM symbol and that is modulated using BPSK modulation rotated by 90 degrees (Q-BPSK). The modulation of the first and second OFDM symbols indicates to a receiver device that conforms to a first communication protocol that the data unit conforms to the first communication protocol. The first OFDM symbol being modulated using BPSK modulation causes a receiver device that conforms to a second communication protocol to determine that the PHY data unit conforms to a third communication protocol.Type: ApplicationFiled: September 11, 2023Publication date: December 28, 2023Inventors: Hongyuan ZHANG, Hui-Ling LOU, Rohit U. NABAR, Sudhir SRINIVASA, Mao YU, Raja BANERJEA
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Patent number: 11757570Abstract: A first portion of a physical layer (PHY) preamble of a PHY data unit is generated for transmission via a communication channel that comprises a plurality of sub-channels. A first portion of the PHY preamble is generated to include a legacy portion and a plurality of first non-legacy signal fields spanning the respective sub-channels. A second portion of a PHY preamble that immediately follows the first portion of the PHY preamble of the PHY data unit is generated to include: a non-legacy short training field spanning all sub-channels in the plurality of sub-channels, a plurality of non-legacy long training fields immediately following the non-legacy short training field, each non-legacy training field spanning all sub-channels in the plurality of sub-channels, and a second non-legacy signal field immediately following the plurality of non-legacy long training fields, the second-legacy signal field spanning all sub-channels in the plurality of sub-channels.Type: GrantFiled: May 28, 2021Date of Patent: September 12, 2023Assignee: Marvell Asia Pte LtdInventors: Hongyuan Zhang, Hui-Ling Lou, Rohit U. Nabar, Sudhir Srinivasa, Mao Yu, Raja Banerjea
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Patent number: 11223507Abstract: Various aspects of the disclosure relate to communication using a data unit that includes a payload with synchronization information. In some aspects, a first apparatus may transmit a data unit that includes at least one synchronization symbol in the payload. A second apparatus that receives the data unit may thereby recover synchronization information from the data unit even if interference at the second apparatus prevents the second apparatus from recovering synchronization information in a preamble of the data unit. In some aspects, the second apparatus may determine, based on information in the at least one synchronization symbol, whether and/or when to conduct a spatial reuse transmission. In some aspects, the second apparatus may determine, based on information in the at least one synchronization symbol, an amount of time to defer transmission.Type: GrantFiled: April 17, 2018Date of Patent: January 11, 2022Assignee: QUALCOMM IncorporatedInventors: Lochan Verma, Raja Banerjea, George Cherian
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Publication number: 20210288754Abstract: A first portion of a physical layer (PHY) preamble of a PHY data unit is generated for transmission via a communication channel that comprises a plurality of sub-channels. A first portion of the PHY preamble is generated to include a legacy portion and a plurality of first non-legacy signal fields spanning the respective sub-channels. A second portion of a PHY preamble that immediately follows the first portion of the PHY preamble of the PHY data unit is generated to include: a non-legacy short training field spanning all sub-channels in the plurality of sub-channels, a plurality of non-legacy long training fields immediately following the non-legacy short training field, each non-legacy training field spanning all sub-channels in the plurality of sub-channels, and a second non-legacy signal field immediately following the plurality of non-legacy long training fields, the second-legacy signal field spanning all sub-channels in the plurality of sub-channels.Type: ApplicationFiled: May 28, 2021Publication date: September 16, 2021Inventors: Hongyuan ZHANG, Hui-Ling LOU, Rohit U. NABAR, Sudhir SRINIVASA, Mao YU, Raja BANERJEA
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Publication number: 20210282186Abstract: This disclosure provides methods, devices and systems for transmitting and receiving physical protocol data units (PPDUs) over multiple links. In some aspects, a wireless communication device may determine that first random back off (RBO) for a first channel of a first link has counted down to zero. A wireless communication device may determine, when the first RBO has counted down to zero, that a second RBO for a second channel of a second link has a count down remaining. A wireless communication device may optionally transmit a medium reservation message on the first link reserving a transmission opportunity (TXOP). A wireless communication device may determine whether to wait for the second RBO before transmitting on the first link. A wireless communication device may transmit at least a first PPDU on the first link during the TXOP.Type: ApplicationFiled: March 1, 2021Publication date: September 9, 2021Inventors: George CHERIAN, Abhishek Pramod PATIL, Sai Yiu Duncan HO, Alfred ASTERJADHI, Yanjun SUN, Guido Robert FREDERIKS, Maarten Menzo WENTINK, Raja BANERJEA
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Publication number: 20210266965Abstract: This disclosure provides methods, devices and systems for non-simultaneous transmit and receive (STR) station (STA) transmissions using multiple links. In one aspect, a medium synchronization delay timer associated with a second link of the non-STR STA can be initiated in response to completing transmission of the data on the first link to delay triggering of a clear channel assessment (CCA) associated with the second link. Data can be transmitted on the second link in response to expiration of the medium synchronization delay timer. In another aspect, an energy detect (ED) threshold level on a second link may be decreased from a first ED threshold level to a second ED threshold level after transmitting the data on the first link. In a further aspect, a block acknowledgment (BA) frame including a network allocation vector (NAV) synchronization of a second access point may be transmitted to the first link of the station.Type: ApplicationFiled: February 22, 2021Publication date: August 26, 2021Inventors: Sai  Yiu Duncan HO, George CHERIAN, Abhishek Pramod PATIL, Alfred ASTERJADHI, Raja BANERJEA, Bin TIAN, Yanjun SUN
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Patent number: 11051297Abstract: Certain aspects of the present disclosure relate to providing a mechanism that may be used to flexibly and efficiently signal spatial reuse (SR) and/or transmit opportunity (TXOP) duration information.Type: GrantFiled: June 28, 2017Date of Patent: June 29, 2021Assignee: QUALCOMM IncorporatedInventors: Abhishek Pramod Patil, Alfred Asterjadhi, George Cherian, Raja Banerjea, Simone Merlin
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Patent number: 11025368Abstract: A preamble of a physical layer (PHY) data unit that conforms to a first communication protocol is generated. The preamble includes a legacy field that is formatted according to a second communication protocol, and a signal field having a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol. The first OFDM symbol (i) immediately follows the legacy field and (ii) is modulated using binary phase shift keying (BPSK) modulation, whereas a third communication protocol specifies that an OFDM symbol, defined by the third communication protocol, that immediately follows the legacy field is modulated using BPSK modulation rotated by 90 degrees (Q-BPSK). The second OFDM symbol (i) immediately follows the first OFDM symbol and (ii) is modulated using Q-BPSK to indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol.Type: GrantFiled: May 15, 2017Date of Patent: June 1, 2021Assignee: Marvell Asia Pte, Ltd.Inventors: Hongyuan Zhang, Hui-Ling Lou, Rohit U. Nabar, Sudhir Srinivasa, Mao Yu, Raja Banerjea
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Patent number: 11006480Abstract: A communication device generates a physical layer (PHY) data unit that includes a PHY preamble and one or more PHY midambles. The communication generates the PHY preamble of the PHY data unit to include i) a signal field having a subfield that indicates that the PHY data unit includes one or more PHY midambles, ii) a short training field (STF) for automatic gain control (AGC) training and synchronization at a receiver, and iii) one or more long training fields (LTFs) for determining a channel estimate at the receiver. The communication generates a data payload of the PHY data unit having i) a set of orthogonal frequency division multiplexing (OFDM) symbols, and ii) one or more PHY midambles. Each of the one or more PHY midambles includes one or more LTFs for determining an updated channel estimate. The communication device transmits the PHY data unit via a wireless communication channel.Type: GrantFiled: July 29, 2019Date of Patent: May 11, 2021Assignee: Marvell Asia Pte, Ltd.Inventors: Hongyuan Zhang, Rohit U. Nabar, Sudhir Srinivasa, Raja Banerjea, Yong Liu
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Publication number: 20200322005Abstract: A first field of a preamble includes a plurality of indications of respective numbers of spatial or space-time streams for respective receivers to enable each receiver among the multiple receivers to determine a respective set of one or more training sequences, in a plurality of training sequences, that corresponds to the receiver. A second field of the preamble includes respective modulation and coding scheme information for the respective receivers. The preamble is generated such that i) the first field is transmitted prior to the plurality of training sequences, and ii) the second field of the preamble is transmitted after the plurality of training sequences are transmitted. A data portion of the multi-user data unit is generated using respective modulation and coding schemes for the respective receivers. Thee multi-user data unit is transmitted such that data for the respective receivers are transmitted via respective sets of one or more spatial or space-time streams.Type: ApplicationFiled: June 17, 2020Publication date: October 8, 2020Inventors: Hongyuan ZHANG, Raja BANERJEA, Yong LIU, Mao YU
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Patent number: 10764877Abstract: The present disclosure provides various aspects related to techniques for generating trigger frames, at an AP, that reduce the overhead associated with triggering an uplink transmission from the STA. In some examples, the STA may also calculate its transmit power by decoding a spatial reuse subfield of the trigger frame from the AP and identifying downlink pathloss measurements of the trigger frame. Accordingly, the STA may identify acceptable interference level of the AP and calculate a transmit power in order to minimize interference at the AP. In some aspects, the STA may transmit its uplink packets to a different AP on one or more punctured channels at the calculated transmit power of the STA.Type: GrantFiled: May 4, 2017Date of Patent: September 1, 2020Assignee: QUALCOMM IncorporatedInventors: Lochan Verma, Sameer Vermani, Bin Tian, Lin Yang, Raja Banerjea, Alfred Asterjadhi
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Patent number: 10742357Abstract: In a method for generating a data unit conforming to a first communication protocol, a first field and a second field to be included in a preamble of the data unit are generated. The first field includes a first set of one or more information bits that indicate a duration of the data unit and is formatted such that the first field allows a receiver device that conforms to a second communication protocol to determine the duration of the data unit. The second field includes a second set of one or more information bits that indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol. The first field and the second field are modulated using a modulation scheme specified for a field corresponding to the first field and the second field, respectively, by the second communication protocol.Type: GrantFiled: November 19, 2018Date of Patent: August 11, 2020Assignee: Marvell International Ltd.Inventors: Hongyuan Zhang, Sudhir Srinivasa, Rohit U. Nabar, Raja Banerjea
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Patent number: 10693533Abstract: A first field of a preamble includes a plurality of indications of respective numbers of spatial or space-time streams for respective receivers to enable each receiver among the multiple receivers to determine a respective set of one or more training sequences, in a plurality of training sequences, that corresponds to the receiver. A second field of the preamble includes respective modulation and coding scheme information for the respective receivers. The preamble is generated such that i) the first field is transmitted prior to the plurality of training sequences, and ii) the second field of the preamble is transmitted after the plurality of training sequences are transmitted. A data portion of the multi-user data unit is generated using respective modulation and coding schemes for the respective receivers. The multi-user data unit is transmitted such that data for the respective receivers are transmitted via respective sets of one or more spatial or space-time streams.Type: GrantFiled: March 7, 2016Date of Patent: June 23, 2020Assignee: Huawei Technologies Co., Ltd.Inventors: Hongyuan Zhang, Raja Banerjea, Yong Liu, Mao Yu
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Patent number: 10624055Abstract: To determine a location of a client device in a wireless network having at least first and second network devices, with known locations, one of the network devices transmits a message to the other network device and the other network device responds with an acknowledgement message. A client device receives the message and the acknowledgement message as well as respective times indicating actual times at which the message and the acknowledgement message were processed by one of the first and second network devices. The client device determines its location based on the times at which it received the message and the acknowledgement message and the difference between the actual processing times. This location may be refined by determining an angle between the client device and at least one of the network devices having multiple antennas and being configured for steered beam communications.Type: GrantFiled: January 24, 2019Date of Patent: April 14, 2020Assignee: CSR Technology Inc.Inventors: Naveen Kumar Kakani, Benjamin Tarlow, Erik David Lindskog, Raja Banerjea, Hong Wan, Ian Charles Blair
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Patent number: 10536899Abstract: First data units associated with one or more power-constrained sensor devices are transmitted in a wireless network, and second data units associated with offload of cellular telephone data are transmitted in the wireless network. Priority is given to transmission of the first data units over transmission of the second data units with regard to access to a wireless medium. Transmissions in the wireless network are permitted at a plurality of different channel bandwidths including a minimum channel bandwidth, and transmissions in the wireless network corresponding to offload of cellular telephone data are permitted only using a channel bandwidth, among the plurality of different channel bandwidths, that is greater than the minimum channel bandwidth.Type: GrantFiled: August 19, 2016Date of Patent: January 14, 2020Assignee: Marvell World Trade Ltd.Inventors: Yong Liu, Raja Banerjea
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Patent number: 10470174Abstract: The present disclosure provides various aspects related to techniques for generating trigger frames, at an access point (AP), that reduce the overhead associated with triggering an uplink transmission from the wireless station (STA). Features of the present disclosure achieve this by, for example, utilizing a single per-user information field of the trigger to signal a plurality of random access resource units that may be allocated to the one or more STAs in the network. Such a technique is an improvement over the conventional system that require each random access resource unit to be signaled separately in a separate per-user information field (thus increasing the overhead). Additionally, aspects of the present disclosure allow the AP to effectively signal to the STA whether the one or more resources allocated to the at least one STA are a single user resource unit allocation or a multi-user resource unit allocation.Type: GrantFiled: January 9, 2019Date of Patent: November 5, 2019Assignee: QUALCOMM IncorporatedInventors: Lochan Verma, Sameer Vermani, Bin Tian, Lin Yang, Raja Banerjea, Alfred Asterjadhi
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Patent number: 10397033Abstract: A first legacy portion of a physical layer (PHY) preamble is generated, wherein the first legacy portion of the PHY preamble is generated to include a signal field having PHY parameters arranged in subfields according to a first legacy communication protocol. A second portion of the PHY preamble is generated according to a second communication protocol, wherein the second portion of the PHY preamble is generated to include a repetition of the signal field. A PHY data unit that includes the PHY preamble is generated, the PHY data unit being for transmission via a wireless communication channel.Type: GrantFiled: September 4, 2015Date of Patent: August 27, 2019Assignee: Marvell World Trade Ltd.Inventors: Hongyuan Zhang, Rohit U. Nabar, Raja Banerjea, Yong Liu, Sudhir Srinivasa, Hyukjoon Kwon
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Patent number: 10375683Abstract: The present disclosure provides various aspects related to techniques for generating trigger frames, at an access point (AP), that reduce the overhead associated with triggering an uplink transmission from the wireless station (STA). Features of the present disclosure achieve this by, for example, utilizing a single per-user information field of the trigger to signal a plurality of random access resource units that may be allocated to the one or more STAs in the network. Such a technique is an improvement over the conventional system that require each random access resource unit to be signaled separately in a separate per-user information field (thus increasing the overhead). Additionally, aspects of the present disclosure allow the AP to effectively signal to the STA whether the one or more resources allocated to the at least one STA are a single user resource unit allocation or a multi-user resource unit allocation.Type: GrantFiled: May 4, 2017Date of Patent: August 6, 2019Assignee: QUALCOMM IncorporatedInventors: Lochan Verma, Sameer Vermani, Bin Tian, Lin Yang, Raja Banerjea, Alfred Asterjadhi
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Patent number: 10368391Abstract: A communication device generates a physical layer (PHY) data unit that includes a PHY preamble and one or more PHY midambles. The communication generates the PHY preamble of the PHY data unit to include i) a signal field having a subfield that indicates that the PHY data unit includes one or more PHY midambles, ii) a short training field (STF) for automatic gain control (AGC) training and synchronization at a receiver, and iii) one or more long training fields (LTFs) for determining a channel estimate at the receiver. The communication generates a data payload of the PHY data unit having i) a set of orthogonal frequency division multiplexing (OFDM) symbols, and ii) one or more PHY midambles. Each of the one or more PHY midambles includes one or more LTFs for determining an updated channel estimate. The communication device transmits the PHY data unit via a wireless communication channel.Type: GrantFiled: September 3, 2018Date of Patent: July 30, 2019Assignee: Marvell International Ltd.Inventors: Hongyuan Zhang, Rohit U. Nabar, Sudhir Srinivasa, Raja Banerjea, Yong Liu
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Publication number: 20190230674Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for the scheduling of wireless resources to multiple wireless stations participating in a simultaneous transmission. Some implementations more specifically relate to the allocation of resource units (RUs) to stations for an uplink multi-user OFDMA (UL MU-OFDMA) transmission. In some implementations, an access point (AP) may adjust a modulation and coding scheme (MCS) of one of the stations based on the results of a power imbalance check. For example, in response to determining that a station failed the power imbalance check, the AP may reduce the MCS assigned to the station from a current value to a reduced value as opposed to simply dropping the station from the scheduled transmission. In some implementations, the AP then performs another power imbalance check based on the reduced MCS.Type: ApplicationFiled: January 19, 2018Publication date: July 25, 2019Inventors: Chao Cheng, Xiaolong Huang, Raja Banerjea, Ning Zhang