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公开(公告)号：US20210076179A1
公开(公告)日：2021-03-11
申请号：US17011712
申请日：2020-09-03
发明人： Rui CAO , Prashant SHARMA , Hongyuan ZHANG
摘要： In a vehicular communication network, a communication device generates a physical layer (PHY) preamble of a PHY protocol data unit (PPDU) for transmission in the vehicular communication network. The communication device generates a plurality of PHY data segments of the PPDU, and one or more PHY midambles, each PHY midamble to be transmitted between a respective pair of adjacent PHY data segments, and each PHY midamble including one or more training signal fields. Generating the one or more PHY midambles includes, when the PPDU is to be transmitted according to an extended range (ER) mode, generating each training signal field to include i) a first portion based on a very high throughput long training field (VHT-LTF) defined by the IEEE 802.11ac Standard and ii) a second portion based on the VHT-LTF defined by the IEEE 802.11ac Standard; and transmitting, by the communication device, the PPDU in the vehicular communication network.
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公开(公告)号：US20230353287A1
公开(公告)日：2023-11-02
申请号：US18206030
申请日：2023-06-05
申请人： Marvell Asia Pte Ltd
发明人： Yan ZHANG , Liwen CHU , Rui CAO , Hongyuan Zhang
IPC分类号： H04W80/02 , H04L1/1867 , H04L1/1812 , H04L1/00
CPC分类号： H04L1/1819 , H04L1/0008 , H04L1/0061 , H04L1/1893 , H04W80/02 , H04W84/12
摘要： A wireless communication device generates physical layer (PHY) protocol service data units (PSDUs), and, in response to determining that the PHY data unit is to be transmitted according to a HARQ process, generates HARQ coding units of a common length, each of the HARQ coding units including a respective set of one or more PSDUs, and individually encodes the HARQ coding units. The wireless communication device also generates a HARQ signal field to the included in a PHY preamble of the PHY data unit. The HARQ signal field includes i) a common information subfield to indicate one or more parameters that commonly apply to each of at least some of the one or more HARQ coding units and ii) a respective HARQ coding unit information subfield for each of the HARQ coding units to indicate one or more parameters that apply to only the corresponding HARQ coding unit.
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公开(公告)号：US20200329519A1
公开(公告)日：2020-10-15
申请号：US16847092
申请日：2020-04-13
发明人： Rui CAO , Hongyuan ZHANG , Sudhir SRINIVASA
摘要： A first aggregated MAC protocol data unit (A-MPDU) is generated for transmission over a first frequency segment of a communication channel, and a second A-MPDU is generated for transmission over a second frequency segment of the communication channel. A PHY protocol data unit (PPDU) is generated to include the plurality of A-MPDUs and a second PPDU is generated to include the second A-MPDU. A first transmit processor generates a first RF signal for transmission of the first PPDU over the first frequency segment and a second transmit processor generates a second RF signal for transmission of the second PPDU over the second frequency segment. The first RF signal is transmitted in the first frequency segment simultaneously with the second RF signal being transmitted in the second frequency segment.
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公开(公告)号：US20200329444A1
公开(公告)日：2020-10-15
申请号：US16846128
申请日：2020-04-10
发明人： Rui CAO , Hongyuan ZHANG , Liwen CHU , Yan ZHANG , Hui-Ling LOU
IPC分类号： H04W56/00
摘要： A communication device determines whether simultaneous transmissions in a first frequency segment and a second frequency segment are to be synchronized in time. In response determining that simultaneous transmissions in the first frequency segment and the second frequency segment are to be synchronized in time, the communication device transmits a first packet in the first frequency segment beginning at a first time, and transmits a second packet in the second frequency segment beginning at the first time. In response to determining that simultaneous transmissions in the first frequency segment and the second frequency segment are to be unsynchronized in time, the communication device transmits a third packet in the first frequency segment beginning at a second time, and transmits a fourth packet in the second frequency segment beginning at a third time that is different than the second time.
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15.发明公开公开(公告)号：US20240146590A1
公开(公告)日：2024-05-02
申请号：US18407159
申请日：2024-01-08
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Hongyuan ZHANG , Hui-Ling LOU , Xiayu ZHENG
CPC分类号： H04L27/2602 , H04L5/0092 , H04L5/0094 , H04L27/2627 , H04W84/12
摘要： A communication device selects a frequency bandwidth via which a physical layer (PHY) protocol data unit (PPDU) will be transmitted in a vehicular communication network, and generates, the PPDU i) according to a downclocking ratio of 1/2, and ii) based on an orthogonal frequency division multiplexing (OFDM) numerology defined by an IEEE 802.11ac Standard. In response to the selected frequency bandwidth being 10 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs. In response to the selected frequency bandwidth being 20 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs.
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公开(公告)号：US20240097748A1
公开(公告)日：2024-03-21
申请号：US18520523
申请日：2023-11-27
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Hongyuan ZHANG
IPC分类号： H04B7/0417 , H04B7/0456 , H04B7/06 , H04L5/00 , H04W16/28
CPC分类号： H04B7/0421 , H04B7/0456 , H04B7/0626 , H04B7/066 , H04L5/0007 , H04W16/28
摘要： A first communication device receives a sounding packet from a second communication device and develops beamforming information based on the sounding packet. The first communication device transmits beamforming feedback to the second communication device, the beamforming feedback including beamforming information for use by the second communication device to beamsteer a data packet to the first communication device, the data packet having a data portion that includes a second number of OFDM tones greater than a first number of OFDM tones in the sounding packet. After transmitting the beamforming feedback, the first communication device receives the data packet from the second communication device, the data packet including one or more data OFDM symbols, each of the one or more data OFDM symbols having the second number of OFDM tones.
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17.发明公开公开(公告)号：US20230171138A1
公开(公告)日：2023-06-01
申请号：US18101893
申请日：2023-01-26
申请人： Marvell Asia Pte Ltd
发明人： Liwen CHU , Hongyuan ZHANG , Hui-Ling LOU , Rui CAO , Yan ZHANG
IPC分类号： H04L27/26 , H04W72/0453 , H04W72/12
CPC分类号： H04L27/2602 , H04W72/0453 , H04W72/12 , H04W84/12
摘要： A communication device determines that simultaneous transmission/reception via multiple frequency segments in a WLAN is not permitted, and transmits a first packet in a first frequency segment and a second packet in a second frequency segment. The communication device determines that an end of the first packet does not align with an end of the second packet and that the first packet and/or the second packet prompts transmission of a respective response packet a defined time period after transmission of the corresponding one of the first packet and the second packet. In response to having determined that simultaneous transmission/reception is not permitted and that the first packet and/or the second packet prompts transmission of the respective response packet, the communication device pads the first packet and/or the second packet so that an end of transmission of the first packet is aligned with an end of transmission of the second packet.
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公开(公告)号：US20220239349A1
公开(公告)日：2022-07-28
申请号：US17718077
申请日：2022-04-11
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Hongyuan ZHANG
IPC分类号： H04B7/0417 , H04L5/00 , H04W16/28 , H04B7/0456 , H04B7/06
摘要： A first communication device transmits a plurality of training signals to a second communication device via a communication channel The first communication device receives feedback generated at the second communication device based on the plurality of training signals. The feedback includes steering matrix information for a plurality of orthogonal frequency division multiplexing (OFDM) tones and (ii) additional phase information corresponding to channel estimates obtained for the plurality of OFDM tone. The first communication device constructs, based on the steering matrix information, a plurality of steering matrices corresponding to the plurality of OFDM tones, and compensates, using the additional phase information, the plurality of steering matrices to reduce phase discontinuities between the OFDM tones. The first communication device steers, using the compensated steering matrices, at least one transmission via the communication channel to the second communication device.
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公开(公告)号：US20200163016A1
公开(公告)日：2020-05-21
申请号：US16773521
申请日：2020-01-27
发明人： Rui CAO , Hongyuan ZHANG
摘要： A communication device generates a first portion of a wakeup packet that corresponds to a legacy physical layer protocol (PHY) preamble, and includes a first orthogonal frequency division multiplexing (OFDM) symbol that spans a first bandwidth and is modulated according to a modulation scheme. The communication device scrambles a plurality of information bits to generate scrambled information bits, and generates a second OFDM symbol to include the scrambled information bits. The second OFDM symbol spans the first bandwidth and is modulated according to the modulation scheme to signal to other communication devices that the wakeup packet does not conform to a communication protocol. The first communication device generates a second portion of the wakeup packet, which corresponds to a second bandwidth that is less than the first bandwidth. The communication device transmits the second OFDM symbol between the first portion of the wakeup packet and the second portion of the wakeup packet.
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