公开(公告)号：US20210378054A1

公开(公告)日：2021-12-02

申请号：US16884364

申请日：2020-05-27

Applicant: QUALCOMM Incorporated

Inventor： Vinod BELUR RAMACHANDRA ,  Abhijit BHATTACHARYA ,  Mani Bharathi PANDIAN ,  Arul Durai Murugan PALANIVELU

IPC: H04W84/12 ,  H04W72/08 ,  H04W52/02 ,  H04L5/00 ,  H04L1/16

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for spatial reuse in a wireless network. In an example method, a first wireless device detects an overlapping basic service set (OBSS) packet received from a second wireless device in an OBSS, decodes one or more signal fields of the OBSS packet, determines that the OBSS packet is a transmission in which one or more resource unit (RUs) are unallocated, and performs a spatial reuse (SR) transmission to one or more first stations using a number of the unallocated RUs.

公开(公告)号：US20240260094A1

公开(公告)日：2024-08-01

申请号：US18162670

申请日：2023-01-31

Applicant: QUALCOMM Incorporated

Inventor： Abhijit BHATTACHARYA ,  Sudheer Manjunath POOJARY ,  Akshay Kumar BAJPAI ,  Manikandan CHANDRASEKAR ,  Raj Kumar KRISHNA KUMAR

IPC: H04W74/08 ,  H04B17/318 ,  H04B17/336

CPC classification number: H04W74/085 ,  H04B17/318 ,  H04B17/336

Abstract: This disclosure provides methods, devices and systems for clear channel assessment (CCA) for wireless communications in wireless local area networks (WLANs). In some aspects, an access point (AP) may detect an interfering transmission associated with an overlapping basic service set (OBSS). The AP may further transmit, to at least one station (STA), a probe frame soliciting information indicating an interference environment observed by the at least one STA when an interfering transmission fails to satisfy an interference criterion associated with the AP. The AP may further transmit the probe frame to the at least one STA after a backoff period when the interfering transmission satisfies the interference criterion associated with the AP.

公开(公告)号：US20220224448A1

公开(公告)日：2022-07-14

申请号：US17144689

申请日：2021-01-08

Applicant: QUALCOMM Incorporated

Inventor： Raj Kumar KRISHNA KUMAR ,  Rohit KAPOOR ,  Yatiraj Paniyoor TANTRI ,  Balaji NAGARAJAN ,  Abhijit BHATTACHARYA ,  Padmanabhan Venkataraman KARTHIC ,  Kundan Kumar LUCKY ,  Venkatesh BHAT ,  Chiranthan PURUSHOTHAM ,  Siju KURIAN

IPC: H04L1/18

Abstract: Certain aspects of the present disclosure provide techniques for sending a retransmission of codewords of a data packet to a receiver node, that were not previously successfully received by the receiver node, in a manner compatible with a receive capability constraint of the receiver node.

公开(公告)号：US20210136818A1

公开(公告)日：2021-05-06

申请号：US17061125

申请日：2020-10-01

Applicant: QUALCOMM Incorporated

Inventor： Pravjyot Singh DEOGUN ,  Abhijit BHATTACHARYA ,  Xiaoxia ZHANG ,  Ozcan OZTURK ,  Jing SUN ,  Kapil BHATTAD ,  Tanumay DATTA

IPC: H04W74/08 ,  H04W76/18 ,  H04W76/19 ,  H04W72/04 ,  H04W52/36 ,  H04W24/08 ,  H04W74/02

Abstract: The present disclosure relates to wireless communications, and more particularly to enhancements to a random access channel (RACH) procedure for use in New Radio (e.g., 5G) communications in the unlicensed spectrum (also referred to as NR-U). The present disclosure provides a user equipment (UE) or network entity that determines an available RACH occasion (RO) within a slot for a message transmission according to one of a two-step RACH procedure or a four-step RACH procedure, wherein the available RO is adjacent to at least one unavailable RO within the slot. The UE or network entity may further perform, during the RO, the message transmission according to one of the two-step RACH procedure or the four-step RACH procedure.

公开(公告)号：US20190037460A1

公开(公告)日：2019-01-31

申请号：US15662210

申请日：2017-07-27

Applicant: QUALCOMM Incorporated

Inventor： Abhijit BHATTACHARYA ,  Yanjun SUN ,  Peerapol TINNAKORNSRISUPHAP ,  Brian Michael BUESKER ,  Saiyiu Duncan HO ,  Rajesh KUMAR ,  Rohit KAPOOR

IPC: H04W36/08

Abstract: Disclosed are methods and systems for a wireless communication network including detecting a trigger to switch a serving channel at a first access point, and communicating a first channel switch message from the first access point to a second access point. The first access point may be in a downstream and/or upstream or communication flow in relation to the second access point. The process may include communicating a first Channel Switching Announcement (CSA) message from the second access point to at least one client of the second access point, where the least one client is one of a plurality of clients receiving internet connectivity through a series of communication flows including a data flow through the second access point. The process further includes revising a time to switch channel information included in the first channel switch message, where the first CSA message includes the revised time to switch channel information.

公开(公告)号：US20230370978A1

公开(公告)日：2023-11-16

申请号：US18245711

申请日：2021-10-27

Applicant: QUALCOMM Incorporated

Inventor： Abhijit BHATTACHARYA ,  Vinod BELUR RAMACHANDRA ,  Arul Durai Murugan PALANIVELU ,  Raj Kumar KRISHNA KUMAR

IPC: H04W52/24 ,  H04W52/22 ,  H04L1/00

CPC classification number: H04W52/245 ,  H04L1/0003 ,  H04W52/225 ,  H04W52/242

Abstract: This disclosure provides systems, methods and apparatuses for selectively using spatial reuse (SR) transmissions in the presence of an overlapping basic service set (OBSS) transmission. In some implementations, a wireless communication device may transmit data to another wireless communication device using SR packets in the presence of an OBSS transmission or interference only when the signal strength of SR packets received at the other wireless communication device is greater than an amount of signal degradation of the OBSS transmission caused by the SR transmission.

公开(公告)号：US20210051664A1

公开(公告)日：2021-02-18

申请号：US16944829

申请日：2020-07-31

Applicant: QUALCOMM Incorporated

Inventor： Abhijit BHATTACHARYA ,  Arul Durai Murugan PALANIVELU ,  Mani Bharathi PANDIAN ,  Rohit KAPOOR

IPC: H04W72/04 ,  H04W16/02 ,  H04W72/08 ,  H04W52/36 ,  H04L1/16 ,  H04W24/10 ,  H04B17/318

Abstract: This disclosure provides systems, methods and apparatuses for dynamically enabling or disabling spatial reuse (SR) transmissions from wireless communication devices belonging to a first basic service set (BSS). In some instances, a first wireless communication device receives a plurality of intra-BSS packets from a second wireless communication device associated with the first BSS, determines an average power level of the intra-BSS packets at the first wireless communication device, determines a maximum power level of overlapping basic service set (OBSS) packets associated with one or more OBSSs, determines a signal-to-interference-plus-noise ratio (SINR) of the intra-BSS packets based on the determined average power level of the intra-BSS packets and the determined maximum power level of the OBSS packets, and determines whether to transmit a spatial reuse (SR) packet to the second wireless communication device while detecting OBSS packets on the wireless medium based on the determined SINR relative to a value.

公开(公告)号：US20250056265A1

公开(公告)日：2025-02-13

申请号：US18447168

申请日：2023-08-09

Applicant: QUALCOMM Incorporated

Inventor： Amol SAXENA ,  Devangam Kotha KIRANKUMAR ,  Raj Kumar KRISHNA KUMAR ,  Manikandan CHANDRASEKAR ,  Abhijit BHATTACHARYA ,  Srinivas PILLAPPAKKAM ,  Rohit KAPOOR

IPC: H04W24/06 ,  H04W24/10

Abstract: This disclosure provides methods, components, devices and systems for interference reduction between wireless communication devices of overlapping basic service sets (OBSSs). Some aspects more specifically relate to signaling mechanisms associated with an OBSS channel sounding operation and power control mechanisms associated with OBSS interference mitigation, either or both of which a first access point (AP) associated with a first basic service set (BSS) may leverage as part of a coordinated beamforming scheme with a second AP associated with a second BSS. In accordance with OBSS channel sounding, the first AP may associate a set of sounding packets with one or more parameters indicative of the second BSS such that the sounding packets appear, to OBSS stations (STAs), as in-BSS sounding packets. Additionally, or alternatively, the first AP may employ a power control mechanism according to which the first AP may apply portion-by-portion transmission power control.