David F Acker

US Patent:

20130128726, May 23, 2013

Filed:

Dec 7, 2012

Appl. No.:

13/708433

Inventors:

Rajant Corporation - Malvern PA, US
Martin A. Lamb - Romansville PA, US
Joseph E. Parks - Coatesville PA, US
David Acker - Malvern PA, US

Assignee:

Rajant Corporation - Malvern PA

International Classification:

H04W 40/02

US Classification:

370225

Abstract:

Traditional computer networks have been designed with the need for highly reliable packet delivery. This is largely handled by a centrally managed simple send-acknowledge protocol. In a highly dynamic mesh network, these methods are inadequate to ensure the most reliable packet delivery. This invention uses the natural redundancy of routes in a mesh and other techniques to increase the reliability of a network, even as the paths to any given node are dynamic in nature.

US Patent:

20200322895, Oct 8, 2020

Filed:

Jun 23, 2020

Appl. No.:

16/909946

Inventors:

- Malvern PA, US
David ACKER - Malvern PA, US
William JORDAN - Ephrata PA, US

International Classification:

H04W 52/24
H04W 52/38

Abstract:

A system and method for controlling dynamic transmit power in a mesh network are disclosed. Distributed power transmit management methodology that implements transmission power management based on a comparison of signal to noise ratios from received beacon packets is used on a peer-to-peer basis. Embodiments work to keep all nodes accessible, dynamically adaptable to constant changes in the network, maximize frequency reuse, and reduce power requirements to maximize network performance while minimizing interference.

US Patent:

20170156118, Jun 1, 2017

Filed:

Dec 1, 2015

Appl. No.:

14/956024

Inventors:

- Malvern PA, US
David ACKER - Malvern PA, US
William JORDAN - Ephrata PA, US

International Classification:

H04W 52/24
H04W 52/38
H04W 72/04

Abstract:

A system and method for controlling dynamic transmit power in a mesh network are disclosed. Distributed power transmit management methodology that implements transmission power management based on a comparison of signal to noise ratios from received beacon packets is used on a peer-to-peer basis. Embodiments work to keep all nodes accessible, dynamically adaptable to constant changes in the network, maximize frequency reuse, and reduce power requirements to maximize network performance while minimizing interference.

US Patent:

20170093697, Mar 30, 2017

Filed:

Dec 7, 2016

Appl. No.:

15/372157

Inventors:

- Malvern PA, US
Martin A. LAMB - Romansville PA, US
Alaattin CALISKAN - Downingtown PA, US
David ACKER - Malvern PA, US
Joseph E. PARKS - Coatesville PA, US

International Classification:

H04L 12/721
H04L 12/803
H04L 12/733
H04L 12/801
H04L 12/26

Abstract:

Computer networks with multiple nodes are often required to deliver packets to all nodes in the network, commonly referred to as “flooding.” Flooding is used to deliver multicast and broadcast packets generated by application, network and other layers of the networking stack. Flooding can be done very reliably but less efficiently via node to node “unicast” transmissions, or very efficiently but less reliably via “broadcast” transmissions. In order to balance reliability with efficiency, this invention defines a threshold for the number of neighboring nodes as seen by a given node prior to a flooding operation to determine whether data should be unicast or broadcast. Below that threshold, unicast is used; at or above that threshold, broadcast is used. The invention also incorporates knowledge of nodes seen in turn by neighbor nodes as part of this decision.

US Patent:

20150271086, Sep 24, 2015

Filed:

Mar 24, 2014

Appl. No.:

14/223397

Inventors:

- Malvern PA, US
David Acker - Malvern PA, US
Joe Parks - Coatesville PA, US

Assignee:

Rajant Corporation - Malvern PA

International Classification:

H04L 12/823
H04L 12/841
H04W 28/02
H04L 12/859

Abstract:

Networks based on Internet Protocol (IPv4) employ an administrative Address Resolution Protocol (ARP) to convert logical IP addresses into physical Ethernet media access control (MAC) addresses. These queries address the entire network, and in very large networks, they contribute substantially to network traffic. This invention identifies ARP packets in a large, dynamic network and uses various means to minimize their broadcast throughout the network. This results in optimized network performance.

US Patent:

20150055471, Feb 26, 2015

Filed:

Nov 11, 2013

Appl. No.:

14/076645

Inventors:

- Malvern PA, US
David Acker - Malvern PA, US
Joseph E. Parks - Coatesville PA, US
William Jordan - Ephrata PA, US

Assignee:

Rajant Corporation - Malvern PA

International Classification:

H04L 12/833
H04L 12/859

US Classification:

370235

Abstract:

The protocol determines the quality of each node to node link(s), based on an exponentially weighted moving average of the time each packet spends within the network node. Once determined, that quality of link is then mapped into the physical QoS resources of the networking hardware in use (within the network). Packets destined for higher quality links will see an upgrade of their QoS rating, while packets destined to lower quality links will see a downgrade of their QoS rating. That adjustment permits the higher quality links to be processed before the lower quality links resulting in more efficient and complete communications in the network. Poorer quality links will no longer act as roadblocks to the higher quality packets.

US Patent:

20140219091, Aug 7, 2014

Filed:

Nov 11, 2013

Appl. No.:

14/076600

Inventors:

- Malvern PA, US
Martin A. Lamb - Romansville PA, US
Alaattin Caliskan - Downingtown PA, US
David Acker - Malvern PA, US
Joseph E. Parks - Coatesville PA, US

Assignee:

Rajant Corporation - Malvern PA

International Classification:

H04L 12/18
H04L 12/801

US Classification:

370235

Abstract:

Computer networks with multiple nodes are often required to deliver packets to all nodes in the network, commonly referred to as “flooding.” Flooding is used to deliver multicast and broadcast packets generated by application, network and other layers of the networking stack. Flooding can be done very reliably but less efficiently via node to node “unicast” transmissions, or very efficiently but less reliably via “broadcast” transmissions. In order to balance reliability with efficiency, this invention defines a threshold for the number of neighboring nodes as seen by a given node prior to a flooding operation to determine whether data should be unicast or broadcast. Below that threshold, unicast is used; at or above that threshold, broadcast is used. The invention also incorporates knowledge of nodes seen in turn by neighbor nodes as part of this decision.

US Patent:

20140160996, Jun 12, 2014

Filed:

Nov 7, 2013

Appl. No.:

14/074363

Inventors:

- Malvern PA, US
David ACKER - Malvern PA, US
Jonathan WURTZ - Bryn Mawr PA, US
David B. HAYNIE - Monroeville NJ, US
Keith SULLIVAN - West Chester PA, US

Assignee:

Rajant Corporation - Malvern PA

International Classification:

H04L 29/06
H04W 4/08
H04L 12/18

US Classification:

370261

Abstract:

Systems, devices, methods for use of a highly mobile conferencing system over potentially dynamic networks, such as a self-healing mobile mesh network which, by means of discrete embedded computers mixes analog and digital data for end user communications in remote, disaster, warfare or topographically challenging environments with further capability of conference calling between groups and discrete nodes within the network.