公开(公告)号：US20190200366A1

公开(公告)日：2019-06-27

申请号：US16228200

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Cheol Hee PARK ,  Ashish Shankar IYER ,  Arvind Vardarajan SANTHANAM ,  Hongsan SHENG ,  Subramanya RAO ,  Feng LU ,  Santosh Kumar RONGALA ,  Li SHENG ,  Yuanbo WANG

IPC: H04W72/08 ,  H04W24/08 ,  H04B17/318 ,  H04L12/26 ,  H04W4/40

CPC classification number: H04W72/085 ,  H04B17/318 ,  H04L43/16 ,  H04W4/40 ,  H04W24/08 ,  H04W72/0486

Abstract: Aspects of the present disclosure implement techniques that allow a vehicle performing V2X communications to provide more accurate S-RSSI measurements and CBR calculations for use in channel selection and congestion control. Techniques may include measuring a sidelink received signal strength indicator (S-RSSI) for each of a plurality of sub-channels, determining one or more signal impairment adjustment factors based on the S-RSSI for each of the plurality of sub-channels, calculating a channel busy ratio (CBR) for the plurality of sub-channels based on the one or more signal impairment adjustment factors, and initiating communication with at least one of the plurality of sub-channels based on at least the CBR.

公开(公告)号：US20190053267A1

公开(公告)日：2019-02-14

申请号：US16059670

申请日：2018-08-09

Applicant: QUALCOMM Incorporated

Inventor： Tae Min KIM ,  Jing LIN ,  Arvind SANTHANAM ,  Timothy PALS ,  Subramanya RAO

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/04 ,  H04W76/14

Abstract: Various aspects related to control channel (e.g., PSCCH) scheduling/prioritizing techniques in wireless communications are described. When a UE may not be able to decode various PSCCH transmissions detected in a subframe, a subset of the PSCCHs may be selected for decoding based on the described methods. In accordance with one aspect, a UE may determine that a total number of PSCCH transmissions in a subframe is greater than a number of PSCCH transmissions that can be decoded within the subframe. Upon such a determination, the UE may select at least one PSCCH transmission in the subframe for decoding based on at least one of: retransmission information, information regarding a transmitting UE associated with the at least one PSCCH transmission, or scheduling priority history associated with a sub-channel carrying the at least one PSCCH transmission. The UE may then decode the at least one PSCCH transmission selected for decoding.

公开(公告)号：US20200037128A1

公开(公告)日：2020-01-30

申请号：US16515899

申请日：2019-07-18

Applicant: QUALCOMM Incorporated

Inventor： Feng LU ,  Cheol Hee PARK ,  Cheng TAN ,  Edmund Victor SIMMONS ,  Sean Vincent MASCHUE ,  Sivaramakrishna VEEREPALLI ,  Arvind Vardarajan SANTHANAM ,  Subramanya RAO

IPC: H04W4/40 ,  H04L27/26 ,  H04B7/06 ,  H04W72/12 ,  H04L1/18

Abstract: This disclosure discloses various vehicle-to-everything (V2X) wireless communication processes that use switching diversity to improve coverage over that of a single transmit antenna. Switching diversity may be implemented by alternating the transmit antennas according to a certain switching pattern. A V2X device determines a pattern for alternating a plurality of antennas for transmitting data packets. The V2X device selects, based on the pattern, a first antenna of the plurality of antennas, and transmit a first packet of the data packets using the first antenna. The V2X device further select, based on the pattern, a second antenna of the plurality of antennas, and transmit a second packet of the data packets using the second antenna.

公开(公告)号：US20190289561A1

公开(公告)日：2019-09-19

申请号：US15919622

申请日：2018-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Michael CORLEY ,  Arvind Vardarajan SANTHANAM ,  Scott HOOVER ,  Aamod KHANDEKAR ,  Subramanya RAO ,  Prabhu KANDASAMY ,  Alexandre PIERROT

IPC: H04W56/00 ,  H04W4/46 ,  H04B1/7073 ,  H04B1/7083 ,  H04W72/04

Abstract: A method for communication includes obtaining a timing signal from a timing synchronization reference source, computing a system frame number (SFN)-direct frame number (DFN) offset, creating a timing fingerprint using the timing signal and the SFN-DFN offset, the timing fingerprint also comprising additional timing information, entering the timing fingerprint into a database, continually updating the timing fingerprint, determining whether the timing signal remains within a threshold, if the timing signal exceeds the threshold, iterating the timing fingerprint, verifying the timing fingerprint to determine whether there is a timing inconsistency between a most recent timing fingerprint and current time, if the timing fingerprint is verified, using the SFN-DFN offset to derive current DFN timing to decode a sidelink control information (SCI) communication, and if the SCI communication is decoded, using the timing signal for communicating over a sidelink communication channel.