Seokman Han from Folsom, CA, age 45

Apparatus And Method For Adaptive Data Packet Scheduling In Mesh Networks
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US Patent:

20090154481, Jun 18, 2009
Filed:

Dec 12, 2007
Appl. No.:

12/001884
Inventors:

Seokman Paul Han - Rancho Cordova CA, US
Raju Pandey - Davis CA, US
International Classification:

H04L 12/28
H04L 12/40
H04J 3/16
H04Q 7/24
US Classification:

370406, 370437, 370465, 370338, 370337
Abstract:

Various embodiments provide an apparatus and method for adaptive data packet scheduling in a mesh network. An example embodiment is configured to divide a time period into a plurality of frames; subdivide each of the plurality of frames into a plurality of slots, each of the plurality of slots providing a time segment for local data communication between nodes in a mesh network; enable a first node to dynamically assign itself a first slot of the plurality of slots for local data communication, the first node using the first slot to receive data communications destined for the first node; and communicate to other nodes of the mesh network information indicative of the first node's dynamic assignment of the first slot.

Apparatus And Method For Admitting New Devices In A Self-Healing, Self-Organizing Mesh Network
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US Patent:

20090168703, Jul 2, 2009
Filed:

Dec 28, 2007
Appl. No.:

12/005720
Inventors:

Raju Pandey - Davis CA, US
Rituparna Ghosh - Folsom CA, US
Seokman Paul Han - Rancho Cordova CA, US
International Classification:

H04Q 7/20
US Classification:

370329
Abstract:

Various embodiments provide an apparatus and method for admitting new devices in a self-healing, self-organizing mesh network. An example embodiment is configured to listen on a dynamically-determined frequency for the network management message; to send jamming messages to neighbor nodes in the wireless mesh network, if the network management message is not received; to receive the network management message from a neighbor node in response to the jamming messages; to synchronize a node timer to the received network management message; and to begin data communications with neighbor sensors using the synchronized node timer.

Apparatus And Method For Adaptive Channel Hopping In Mesh Networks
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US Patent:

20090168796, Jul 2, 2009
Filed:

Dec 28, 2007
Appl. No.:

12/005719
Inventors:

Raju Pandey - Davis CA, US
Seokman Paul Han - Rancho Cordova CA, US
Rituparna Ghosh - Folsom CA, US
International Classification:

H04L 12/43
US Classification:

370458
Abstract:

Various embodiments provide an apparatus and method for adaptive channel hopping in a mesh network. An example embodiment is configured to divide a time period into a plurality of frames; subdivide each of the plurality of frames into a plurality of slots, each of the plurality of slots providing a time segment for local data communication between nodes in a mesh network; enable a first node to dynamically assign itself a first channel for local data communication, the first node using the first channel to receive data communications destined for the first node; and communicate to other nodes of the mesh network information indicative of the first node's dynamic assignment of the first channel.

Apparatus And Method For Establishing Data Communication In A Time-Synchronized Mesh Wireless Network During Time Synchronization Failures
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US Patent:

20100177708, Jul 15, 2010
Filed:

Jan 14, 2009
Appl. No.:

12/321118
Inventors:

Raju Pandey - Davis CA, US
Seokman Paul Han - Rancho Cordova CA, US
Rituparna Ghosh - Folsom CA, US
International Classification:

H04W 60/00
US Classification:

370329
Abstract:

Various embodiments provide an apparatus and method for establishing data communication in a time-synchronized mesh wireless network during time synchronization failures. An example embodiment includes experiencing circumstances adversely affecting synchronization of data communications between wireless network nodes; transitioning to an alert mode wherein a radio of a wireless network node is activated for a longer period of time relative to a normal operating mode; sending a message to at least one neighbor node; listening for a response from the neighbor node; and establishing data communications with the neighbor node upon receiving the response.

Apparatus And Method For Ambient Noise Adaptation In Wireless Sensor Networks
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US Patent:

20100316009, Dec 16, 2010
Filed:

Jun 2, 2010
Appl. No.:

12/802296
Inventors:

Seokman Paul Han - Rancho Cordova CA, US
Rituparna Ghosh - Folsom CA, US
Raju Pandey - Davis CA, US
International Classification:

H04W 72/08
US Classification:

370329
Abstract:

Various embodiments provide an apparatus and method for adapting wireless sensor network device operation to ambient RF noise. An example embodiment includes: initializing a noise threshold value to a default value; detecting an ambient RF noise level on a plurality of channels of a wireless network device; if the ambient RF noise level detected on a pre-determined number of channels is above the noise threshold value, adjusting the noise threshold value by an increment and retesting the ambient RF noise level on the plurality of channels; if the noise threshold value exceeds a pre-determined maximum noise threshold value, suspending data communications by the wireless network device; and if the ambient RF noise level detected on a pre-determined number of channels is below the noise threshold value, retaining the noise threshold value and enabling data communications by the wireless network device.

Seokman Han