US 11,751,146 B2
Localized optimization of isolated sub-DAG based on edge node parenting and distributed density-based optimization
Pascal Thubert, Roquefort les Pins (FR); Robert Edgar Barton, Richmond (CA); Jerome Henry, Pittsboro, NC (US); and Eric Michel Levy-Abegnoli, Valbonne (FR)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Jun. 2, 2022, as Appl. No. 17/831,009.
Application 17/324,304 is a division of application No. 16/814,227, filed on Mar. 10, 2020, granted, now 11,044,682, issued on Jun. 22, 2021.
Application 17/831,009 is a continuation of application No. 17/324,304, filed on May 19, 2021, granted, now 11,356,961.
Prior Publication US 2022/0295423 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 52/38 (2009.01); H04W 40/24 (2009.01); H04W 24/02 (2009.01); H04W 84/18 (2009.01)
CPC H04W 52/383 (2013.01) [H04W 24/02 (2013.01); H04W 40/244 (2013.01); H04W 84/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
attaching, by a network device in a data network, as a child network device to a parent network device of a directed acyclic graph (DAG) rooted by a root network device;
detecting, by the network device, a plurality of wireless link quality values for messages received from respective wireless network devices confined within an isolated area of the data network, the network device positioned outside the isolated area;
identifying, by the network device, one of the wireless network devices within the isolated area as having a best of the wireless link quality values and associated with a prescribed sub-network identifier, the sub-network identifier allocated to the network device operable as an edge node between the DAG and the isolated area; and
transmitting, by the network device, an instruction to the one wireless network device within the isolated area to operate as a forwarding device between the network device and the wireless network devices within the isolated area.