Imran S Khan

US Patent:

20180077663, Mar 15, 2018

Filed:

Nov 17, 2017

Appl. No.:

15/816497

Inventors:

- Cambridge MA, US
Roger J. Wilmarth - Andover MA, US
Imran Khan - Natick MA, US

International Classification:

H04W 56/00
H04L 12/24
H04L 12/721
H04W 40/22
H04W 8/08
H04W 84/18
H04W 88/08
H04W 40/20

Abstract:

A linear wireless sensor network includes network nodes having monotonically varying network node identifiers along each branch of the network. The network identifiers enable the nodes to forward network packets without use of routing tables. Low duty cycle wireless communication protocols enable network packets to be routed to all nodes of very large networks while consuming very little electrical power. Broadcast, rather than unicast, transmissions between nodes take advantage of favorable signal propagation conditions to forward messages using largest possible hops, skipping over nodes when possible. A group of network packets is broadcast and forwarded by a most distant receiving node that received all packets of the group. A receiving node's clock is automatically adjusted, based on which packet(s) of a group of packets was received. A sending node synchronizes near-by receiving nodes. Nodes are provisioned over-the-air, with built-in scheduling. Health and welfare information piggybacks on other network traffic.

US Patent:

20160323839, Nov 3, 2016

Filed:

Apr 28, 2015

Appl. No.:

14/697831

Inventors:

- Cambridge MA, US
Roger J. Wilmarth - Andover MA, US
Imran Khan - Natick MA, US

International Classification:

H04W 56/00
H04L 12/721
H04L 12/24
H04W 40/20

Abstract:

A linear wireless sensor network includes network nodes having monotonically varying network node identifiers along each branch of the network. The network identifiers enable the nodes to forward network packets without use of routing tables. Low duty cycle wireless communication protocols enable network packets to be routed to all nodes of very large networks while consuming very little electrical power. Broadcast, rather than unicast, transmissions between nodes take advantage of favorable signal propagation conditions to forward messages using largest possible hops, skipping over nodes when possible, as well as automatically adapting to time- or spatially-varying conditions. A group of network packets is broadcast and forwarded by a most distant receiving node that received all packets of the group. A receiving node's clock is automatically adjusted, based on which packet(s) of a group of packets was received. A sending node synchronizes near-by receiving nodes. Nodes are provisioned over-the-air, with built-in scheduling. Health and welfare information piggybacks on other network traffic.

US Patent:

20160323841, Nov 3, 2016

Filed:

May 3, 2016

Appl. No.:

15/145088

Inventors:

- Cambridge MA, US
Roger J. Wilmarth - Andover MA, US
Imran Khan - Natick MA, US

International Classification:

H04W 56/00
H04W 40/20
H04L 12/721
H04L 12/24

Abstract:

A linear wireless sensor network includes network nodes having monotonically varying network node identifiers along each branch of the network. The network identifiers enable the nodes to forward network packets without use of routing tables. Low duty cycle wireless communication protocols enable network packets to be routed to all nodes of very large networks while consuming very little electrical power. Broadcast, rather than unicast, transmissions between nodes take advantage of favorable signal propagation conditions to forward messages using largest possible hops, skipping over nodes when possible, as well as automatically adapting to time- or spatially-varying conditions. A group of network packets is broadcast and forwarded by a most distant receiving node that received all packets of the group. A receiving node's clock is automatically adjusted, based on which packet(s) of a group of packets was received. A sending node synchronizes near-by receiving nodes. Nodes are provisioned over-the-air, with built-in scheduling. Health and welfare information piggybacks on other network traffic.