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公开(公告)号：US12137015B2
公开(公告)日：2024-11-05
申请号：US18182288
申请日：2023-03-10
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian , Sameer Vermani , Jialing Li Chen , Youhan Kim
Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, for generating or receiving a multi-generation physical layer protocol data unit (PPDU). The multi-generation PPDU may concurrently include a first generation-specific preamble based on a first generation of a wireless communication specification (such as that defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards) and a second generation-specific preamble based on a second generation of the wireless communication specification in a same transmission. The generation-specific preambles may be generated based on bandwidth portions of a wireless channel that each generation-specific preamble will occupy in the multi-generation PPDU. One or more of the generation-specific preambles may be modified based on an aggregate bandwidth of the multi-generation PPDU. This disclosure includes several options for modifying one or more generation-specific preambles or data fields to accommodate their use in a multi-generation PPDU.
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公开(公告)号：US12120025B2
公开(公告)日：2024-10-15
申请号：US17323563
申请日：2021-05-18
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li Chen , Sameer Vermani , Bin Tian
IPC: H04L45/74
CPC classification number: H04L45/74
Abstract: This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs that support gains in data throughput achievable in accordance with the IEEE 802.11 be amendment, and future generations, of the IEEE 802.11 standard. Among other examples, the preamble designs of the present implementations may allow for more reliable packet detection, more accurate channel estimation, and more robust decoding of signal field (SIG) symbols. Additionally, or alternatively, the preamble designs of the present disclosure may be implemented with different lengths, modulation schemes, or transmit power compared to preamble designs that conform to existing versions of the IEEE 802.11 standard.
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公开(公告)号：US11984976B2
公开(公告)日：2024-05-14
申请号：US17513849
申请日：2021-10-28
Applicant: QUALCOMM Incorporated
Inventor： Sameer Vermani , Bin Tian , Youhan Kim , Jialing Li Chen
CPC classification number: H04L1/0036 , H04L1/0013 , H04W80/02
Abstract: This disclosure provides methods, devices and systems for interpreting reserved bits and values associated with different releases of a wireless communication protocol. In some implementations, a wireless communication device may determine whether to terminate or continue reception of a physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) if it detects a reserved bit in the physical layer preamble set to an unsupported value (such as a value different than what is defined by a version or release of the wireless communication protocol supported by the wireless communication device). In some other implementations, a wireless communication device may determine whether to terminate or continue reception of a PPDU if it detects a field in the physical layer preamble set to a reserved value (such as defined by a version or release of the wireless communication protocol supported by the wireless communication device).
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公开(公告)号：US11956743B2
公开(公告)日：2024-04-09
申请号：US18062839
申请日：2022-12-07
Applicant: QUALCOMM Incorporated
Inventor： Sameer Vermani , Bin Tian , Lin Yang , Jialing Li Chen
CPC classification number: H04W56/0015 , H04W92/20
Abstract: This disclosure provides systems, methods, apparatus, and computer programs encoded on computer storage media, for relative timing drift correction for distributed multi-user transmissions. In one aspect, a first access point (AP) may receive a first signal from a second AP. The first signal may be associated with a channel sounding procedure to be performed substantially simultaneously by the second AP and the first AP. The first AP may then receive a second signal from the second AP, and prior to a substantially simultaneous transmission by the second AP and the first AP. The second signal may include timing information relative to the first signal. The first AP may determine a start time of the substantially simultaneous transmission at the first AP based on the timing information, and may initiate the substantially simultaneous transmission according to the determined start time.
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公开(公告)号：US11805431B2
公开(公告)日：2023-10-31
申请号：US17092702
申请日：2020-11-09
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Stephen Jay Shellhammer , Dung Ngoc Doan , Sameer Vermani , Jialing Li Chen
CPC classification number: H04W24/08 , H04L27/2627 , H04W84/12
Abstract: This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.
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Patent Agency Ranking
公开(公告)号：US11637723B2
公开(公告)日：2023-04-25
申请号：US17097812
申请日：2020-11-13
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Jialing Li Chen , Louay Jalloul , Vincent Knowles Jones, IV , Ning Zhang , Chi-Lin Su , Ahmad Abdulrahman Mohammed
IPC: H04L25/02 , H04L27/26 , H04W72/04 , H04L5/00 , H04W72/044
Abstract: Methods, systems, and devices for wireless communication are described. In some systems (e.g., Wi-Fi systems), a transmitting device such as an access point (AP) or mobile station (STA), may identify a number of spatial streams for a data transmission that is less than a number of transmit antennas, and may transmit a packet over a channel. In a first implementation, the packet may be formatted in a multi-user frame format, with a number of long training field (LTF) symbols equal to the number of transmit antennas. In a second implementation, the packet may be a null data packet (NDP), and the device may transmit a separate data packet. In a third implementation, the packet may be formatted in single-user frame format with a modified LTF. A receiving device may receive the packet, and may perform channel estimation and power amplifier (PA) distortion cancellation based on the received packet.
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公开(公告)号：US11627027B2
公开(公告)日：2023-04-11
申请号：US17356330
申请日：2021-06-23
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li Chen , Bin Tian , Youhan Kim , Cheng-Ming Chen
Abstract: A technique for wireless communication of a punctured null data packet with a long training field sequence is disclosed. The long training field (LTF) sequence is generated for the null data packet (NDP) for transmission over a channel having a bandwidth that is an integer multiple of 80 MHz. The LTF sequence is modulated onto a plurality of tones of the channel excluding tones within a punctured subchannel of a plurality of subchannels of the channel. The modulation may be based on a size and location of the punctured subchannel and a symbol duration associated with transmitting the LTF sequence. The NDP is transmitted including the LTF sequence to a second wireless communication device via the channel. A partial bandwidth feedback may be received in response to the LTF in the punctured NDP.
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公开(公告)号：US11546938B2
公开(公告)日：2023-01-03
申请号：US16988624
申请日：2020-08-08
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li Chen , Sameer Vermani , Lin Yang , Bin Tian , Vincent Knowles Jones, IV , Youhan Kim
Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for including signaling regarding enhanced features of new wireless communication protocols. The signaling may be included in various portions of a physical layer preamble of a wireless transmission. In some implementations, the physical layer preamble may be used to indicate puncturing of subbands or content channels that may carry further signaling in accordance with preamble signaling designs of this disclosure. The physical layer preamble signaling be parallelized for different subchannels of a wireless channel that consists of multiple subchannels. Some implementations of the physical layer preambles may be used to multiplex different types of wireless local area network communications into different subsets of the plurality of subchannels of the wireless channel.
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公开(公告)号：US11245501B2
公开(公告)日：2022-02-08
申请号：US16559571
申请日：2019-09-03
Applicant: QUALCOMM Incorporated
Inventor： George Cherian , Alfred Asterjadhi , Abhishek Pramod Patil , Sameer Vermani , Bin Tian , Stephen Jay Shellhammer , Lochan Verma , Lin Yang , Jialing Li Chen
Abstract: Methods, systems, and devices for wireless communications are described for coordination between multiple access points (APs) for communications within a transmission opportunity (TxOP). A first AP may gain channel access for a TxOP, and may coordinate with at least a second AP to allow both the first AP and the second AP to transmit and receive wireless communications during the TxOP. The first AP, upon gaining channel access following a successful contention-based channel access procedure, may initiate a scheduling phase with the second AP to schedule of resources within the TxOP for the first and second APs. The first AP may initiate a multi-AP coordinated transmission phase following the scheduling phase, during which both the first AP and second AP may communicate with one or more associated STAs.
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公开(公告)号：US20220038241A1
公开(公告)日：2022-02-03
申请号：US17388344
申请日：2021-07-29
Applicant: QUALCOMM Incorporated
Inventor： Sameer VERMANI , Alfred Asterjadhi , Yanjun Sun , Bin Tian , Lin Yang , Jialing Li Chen , George Cherian , Youhan Kim
IPC: H04L5/00
Abstract: This disclosure provides methods, devices and systems for generating enhanced sounding packets. Some implementations more specifically relate to sounding packet designs that support enhancements to wireless communication protocols associated with the Institute of Electrical and Electronics Engineers (IEEE) 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced null data packet announcement (NDPA) frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, the enhanced NDPA frame may be configured in accordance with a legacy or a non-legacy NDPA frame format. In some other implementations, the enhanced NDPA frame may include a subfield carrying information identifying a particular basic service set (BSS) which may be associated with one or more STA information fields. Still further, in some implementations, an Extremely High Throughput (EHT) PPDU may include signaling to indicate whether the EHT PPDU is formatted as a sounding NDP.
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