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公开(公告)号：US20190305813A1
公开(公告)日：2019-10-03
申请号：US16297425
申请日：2019-03-08
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxin Zhang , Erik David Lindskog , Sunil Ravi , Kurt Erwin Landenberger , Mukul Sharma , Arjun Bhatia
Abstract: This disclosure provides systems, methods and apparatuses, including computer programs encoded on computer storage media, for ranging procedures performed using antenna switching. In one aspect, a device initiating a ranging procedure may transmit a ranging request, which may include antenna switching capabilities of the initiating device, a request for antenna switching by a responding device during the ranging procedure, or both. Ranging signaling may be communicated between the initiating device and the responding device using different transmit antennas, receive antennas, or both. In some implementations, ranging messages transmitted by the responding device may include transmit antenna indices used for transmission of different ranging messages, and receive antenna indices used for reception of different ranging response messages. The initiating device may estimate a range relative to the responding device based on round trip times (RTTs) associated with different antenna pairs used during the ranging procedure.
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公开(公告)号：US20190036739A1
公开(公告)日：2019-01-31
申请号：US16046599
申请日：2018-07-26
Applicant: QUALCOMM Incorporated
Inventor： Erik David Lindskog , Ning Zhang , Xiaoxin Zhang , Alireza Raissinia , Naveen Kumar Kakani
Abstract: Methods, systems, and devices for wireless communication are described. A ranging message procedure may employ protection by modifying a cyclic prefix of the ranging message to prevent an attacking device from transmitting a time-advanced copy of the cyclic prefix during symbol of the copied signal. For example, the modified cyclic prefix may include pseudo random training sequences or a set of zero-value symbols. The receiving device may determine a channel estimation technique that accounts for the modified cyclic prefix. The wireless devices performing the ranging measurement process may determine a modulation and coding scheme (MCS) for the ranging message. The wireless devices may negotiate an MCS value and cyclic prefix configuration for the ranging measurement process. In some examples, the ranging message be encoded by applying a sequence of phase rotations or amplitude variations to the base sequence used to generate the sounding training signal.
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公开(公告)号：US11381275B2
公开(公告)日：2022-07-05
申请号：US16297425
申请日：2019-03-08
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxin Zhang , Erik David Lindskog , Sunil Ravi , Kurt Erwin Landenberger , Mukul Sharma , Arjun Bhatia
Abstract: This disclosure provides systems, methods and apparatuses, including computer programs encoded on computer storage media, for ranging procedures performed using antenna switching. In one aspect, a device initiating a ranging procedure may transmit a ranging request, which may include antenna switching capabilities of the initiating device, a request for antenna switching by a responding device during the ranging procedure, or both. Ranging signaling may be communicated between the initiating device and the responding device using different transmit antennas, receive antennas, or both. In some implementations, ranging messages transmitted by the responding device may include transmit antenna indices used for transmission of different ranging messages, and receive antenna indices used for reception of different ranging response messages. The initiating device may estimate a range relative to the responding device based on round trip times (RTTs) associated with different antenna pairs used during the ranging procedure.
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公开(公告)号：US10142781B2
公开(公告)日：2018-11-27
申请号：US15370502
申请日：2016-12-06
Applicant: QUALCOMM Incorporated
Inventor： Santosh Vamaraju , Carlos Horacio Aldana , Xiaoxin Zhang , Ravi Gidvani , Erik David Lindskog
Abstract: Disclosed are methods, systems and devices for obtaining a range between devices based, at least in part, on an exchange of wireless messages. For example, wireless devices may obtain measurements of range based, at least in part, on an exchange fine timing measurement (FTM) messages. In one implementation, an initial FTM request message may be transmitted from a first wireless transceiver device to a second wireless transceiver device comprising one or more parameters indicative of a request for transmission of FTM messages in a particular format.
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Patent Agency Ranking
公开(公告)号：US10277425B2
公开(公告)日：2019-04-30
申请号：US16152998
申请日：2018-10-05
Applicant: QUALCOMM Incorporated
Inventor： Erik David Lindskog , Ning Zhang , Naveen Kumar Kakani , Alireza Raissinia , Xiaoxin Zhang
Abstract: Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.
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公开(公告)号：US10135638B2
公开(公告)日：2018-11-20
申请号：US15943243
申请日：2018-04-02
Applicant: QUALCOMM Incorporated
Inventor： Erik David Lindskog , Ning Zhang , Naveen Kumar Kakani , Alireza Raissinia , Xiaoxin Zhang
Abstract: Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.
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公开(公告)号：US20180287826A1
公开(公告)日：2018-10-04
申请号：US15943243
申请日：2018-04-02
Applicant: QUALCOMM Incorporated
Inventor： Erik David Lindskog , Ning Zhang , Naveen Kumar Kakani , Alireza Raissinia , Xiaoxin Zhang
IPC: H04L25/02
CPC classification number: H04L25/0226 , H04L25/0204 , H04L63/14 , H04W12/12 , H04W84/12
Abstract: Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.
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公开(公告)号：US20180249437A1
公开(公告)日：2018-08-30
申请号：US15902289
申请日：2018-02-22
Applicant: QUALCOMM Incorporated
Inventor： Erik David Lindskog , Naveen Kumar Kakani , Alireza Raissinia
CPC classification number: H04W64/00 , G01S5/0205 , G01S5/0226 , G01S13/825 , G01S13/878 , H04W24/10 , H04W84/12
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for performing ranging operations. In one aspect, an apparatus negotiates a passive ranging schedule between an initiator device and a number of responder devices. The passive ranging schedule indicates a time prior to a selected target beacon transmission time (TBTT) at which the ranging operation is to commence. The apparatus announces the passive ranging schedule to at least one or more passive listening devices, commences the ranging operation at the indicated time by exchanging a number of frames between the initiator device and the number of responder devices, and completes the exchange of frames prior to the selected TBTT.
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公开(公告)号：US20190306825A1
公开(公告)日：2019-10-03
申请号：US16277353
申请日：2019-02-15
Applicant: QUALCOMM Incorporated
Inventor： Erik David Lindskog , Alireza Raissinia
Abstract: This disclosure provides systems, methods and apparatuses, including computer programs encoded on computer storage media, for performing a ranging operation with a responder device. In one aspect, an apparatus exchanges a number of measurement frames with the responder device. The apparatus captures a number of timestamps based on the exchanged measurement frames. The apparatus estimates a carrier frequency offset between the responder device and the apparatus, and reports information indicative of the captured timestamps to the responder device.
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