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公开(公告)号：US20230171139A1
公开(公告)日：2023-06-01
申请号：US18101985
申请日：2023-01-26
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Hongyuan ZHANG , Liwen CHU , Prashant SHARMA
IPC分类号： H04L27/26 , H04W4/40 , H04L5/00 , H04W72/0453 , H04W80/02
CPC分类号： H04L27/2602 , H04W4/40 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04W72/0453 , H04W80/02 , H04L27/2603 , H04L5/0048
摘要： A communication device performs a backoff procedure for a duration of time to determine whether a first sub-channel of a communication channel and a second sub-channel of the communication channel are available for transmission by the communication device. The first sub-channel is designated as a primary channel and the second sub-channel is designated as a secondary channel. Performing the backoff procedure includes using a single backoff counter, and starting and stopping the backoff counter based on sensing the first sub-channel and sensing the second sub-channel.
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2.发明公开公开(公告)号：US20230155869A1
公开(公告)日：2023-05-18
申请号：US18097427
申请日：2023-01-16
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 , H04L27/2627 , H04L5/0092 , H04L5/0094 , 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：US20200328856A1
公开(公告)日：2020-10-15
申请号：US16844727
申请日：2020-04-09
发明人： Rui CAO , Hongyuan ZHANG , Liwen CHU , Prashant SHARMA
摘要： At least a portion of a physical layer (PHY) preamble of a PHY protocol data unit (PPDU) for transmission in a vehicular communication network is generated to span a first bandwidth a) based on a first orthogonal frequency division multiplexing (OFDM) numerology that is defined for a second bandwidth greater than the first bandwidth and b) down-clocked to generate the at least the portion to span the first bandwidth. The at least the portion includes a legacy portion decodable by a legacy device operating in the network. A data portion is generated based on a second OFDM numerology defined to span the second bandwidth. The PPDU is generated to include the at least the legacy portion of the PHY preamble in a first sub-band, a duplicate of the at least the portion of the preamble in a second sub-band, and the data portion that spans the second bandwidth.
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4.发明公开公开(公告)号：US20240195666A1
公开(公告)日：2024-06-13
申请号：US18581026
申请日：2024-02-19
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 , H04W84/12
CPC分类号： H04L27/2602 , H04W72/0453 , H04W72/12 , H04W84/12
摘要： A communication device performs a first backoff operation with a first backoff counter to determine when to transmit a first packet in a first frequency, and performs a second backoff operation with a second backoff counter to determine when to transmit a second packet in a second frequency segment. In connection with the first backoff counter expiring, the communication device transmits the first packet in the first frequency segment. In connection with the second backoff counter expiring, the communication device transmits the second packet in the second frequency segment simultaneously with transmitting the first packet in the first frequency segment. In response to determining that transmission of the first packet in the first frequency segment failed, the communication device increases a first contention window for a retransmission of the first packet, and does not adjust the second contention window for a next transmission in the second frequency segment.
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公开(公告)号：US20220337353A1
公开(公告)日：2022-10-20
申请号：US17851019
申请日：2022-06-27
申请人： Marvell Asia Pte Ltd
发明人： Yan ZHANG , Liwen CHU , Rui CAO , Hongyuan Zhang
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：US20240284151A1
公开(公告)日：2024-08-22
申请号：US18649948
申请日：2024-04-29
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Prashant SHARMA , Hongyuan ZHANG
CPC分类号： H04W4/40 , H04L27/2605 , H04W80/02 , H04W84/12
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：US20230224832A1
公开(公告)日：2023-07-13
申请号：US18120224
申请日：2023-03-10
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Hongyuan ZHANG , Liwen CHU , Yan ZHANG , Hui-Ling LOU
CPC分类号： H04W56/001 , H04W84/12
摘要： A communication device generates a first packet and a second packet. The first packet includes a first physical layer (PHY) preamble having: a first legacy signal field (L-SIG) having first duration information that indicates a first duration of the first packet; and first non-legacy signal field information having first modulation information that indicates a first modulation used in the first packet. The second packet includes a second PHY preamble having: a second L-SIG having second duration information that indicates a second duration of the second packet, wherein the second duration is different than the first duration; and second non-legacy signal field information having second modulation information that indicates a second modulation used in the second packet, wherein the second modulation is different than the first modulation. The communication device simultaneously transmits the first packet in a first frequency segment and the second packet in a second frequency segment.
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公开(公告)号：US20230199446A1
公开(公告)日：2023-06-22
申请号：US18084328
申请日：2022-12-19
申请人： Marvell Asia Pte Ltd
发明人： Rui CAO , Prashant SHARMA , Hongyuan ZHANG
CPC分类号： H04W4/40 , H04L27/2605 , H04W84/12 , H04W80/02
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：US20220078730A1
公开(公告)日：2022-03-10
申请号：US17527004
申请日：2021-11-15
申请人： Marvell Asia Pte Ltd
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 generates a first packet for transmission in a first frequency segment, and generates a first physical layer (PHY) preamble of the first packet to include a first field that indicates a first overall bandwidth that the first packet spans. The communication device generates a second packet for transmission in a second frequency segment, and generates a second PHY preamble of the second packet to include a second field that indicates a second overall bandwidth that the second packet spans. The communication device transmits the first packet in the first frequency segment beginning at a first time, and simultaneously transmits the second packet in the second frequency segment beginning at a second time that is different than the first time.
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10.发明申请公开(公告)号：US20210288858A1
公开(公告)日：2021-09-16
申请号：US17334638
申请日：2021-05-28
发明人： Rui CAO , Hongyuan ZHANG , Hui-Ling LOU , Xiayu ZHENG
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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