公开(公告)号：US11251850B1

公开(公告)日：2022-02-15

申请号：US16877857

申请日：2020-05-19

Applicant: Facebook, Inc.

Inventor： Brian Dunn ,  Krishna Gomadam ,  Djordje Tujkovic

IPC: H04B7/06 ,  H04B7/08 ,  H04B17/336

Abstract: Apparatuses, methods, and systems for coordinated beamforming in a wireless mesh network, are disclosed. One system includes a network that includes a plurality of nodes connected through wireless links, and a controller. The wireless links including aggressor links and victim links wherein the aggressor links interfere with the victim links. The controller is operative to identify the aggressor links and the victim links of a group of nodes of the plurality of nodes, coordinate beam scans of aggressor transmitter nodes associated with the aggressor links, coordinate reception of one or more victim receive nodes associated with the victim links, characterize or receive characterizations of measured interference at the one or more victim receive nodes during the coordinated beam scans, and select beamforming coefficients for the aggressor transmitter nodes based at least on the characterizations of the measured interference.

公开(公告)号：US11191053B1

公开(公告)日：2021-11-30

申请号：US16986873

申请日：2020-08-06

Applicant: Facebook, Inc.

Inventor： Michel Ouellette ,  Brett Eric Schein ,  Brian Dunn

IPC: H04W56/00

Abstract: Apparatuses, methods, and systems for a network-based clock for time distribution across a wireless network, are disclosed. One system includes a network that includes a time distributor, a time receiver, and a plurality of network elements providing one or more network connections between the time distributor and the time receiver. The plurality of network elements includes an ingress network element and an egress network element. The time distributor receives and synchronizes to a first clock. Two or more of the plurality of network elements receives and synchronize to a second clock. A forward network transit delay is determined between the ingress network element and the egress network element and a backward network transit delay is determined between the egress network element and the ingress network element. The time receiver time synchronizes to the time distributor using the forward network transit delay and the backward network transit delay.

公开(公告)号：US11070348B1

公开(公告)日：2021-07-20

申请号：US16716224

申请日：2019-12-16

Applicant: Facebook, Inc.

Inventor： Po-Han Huang ,  Krishna Gomadam ,  Brian Dunn ,  Anubhav Singla ,  Fan Sun

IPC: H04W56/00 ,  H04L7/00 ,  H04L12/733 ,  H04B7/06 ,  H04W72/04 ,  H04W24/08 ,  H04L12/18 ,  H04W40/02 ,  H04J3/06

Abstract: Apparatuses, methods, and systems for synchronizing nodes of a wireless network are disclosed. One method includes identifying synchronization paths between synchronization reference nodes of the wireless network and each non-reference node of the wireless network, wherein each synchronization path includes one or more wireless hops between the synchronization reference nodes and the non-reference node, determining a number of timing slots needed for supporting each of the identified synchronization paths, and selecting at least one of the synchronization paths between each non-reference node and at least one of the synchronization reference nodes based on a number of wireless hops of each of the identified synchronization paths and the determined number of timing slots needed to support each of the identified synchronization paths.