Karthikeyan Chandrashekar from 7213 Taveshire Way, Bethesda, MD 20817, age 46

Modeling And Simulating Wireless Mac Protocols
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US Patent:

20080103738, May 1, 2008
Filed:

Oct 20, 2007
Appl. No.:

11/875900
Inventors:

Karthikeyan CHANDRASHEKAR - Bethesda MD, US
Paul M. Janes - Bethesda MD, US
Alain J. Cohen - McLean VA, US
Pradeep Singh - Arlington VA, US
David James Boyd - Fulton MD, US
Ibrahim Utku Moral - Gaithersburg MD, US
International Classification:

G06G 7/48
US Classification:

703 6
Abstract:

Channel access delays and reception uncertainty are modeled as protocol-independent generic processes that are optimized for improved simulation performance. The generic process components are designed such that each different protocol can be modeled using an arrangement of these components that is specific to the protocol. In this way, speed and/or accuracy improvements to the generic process components are reflected in each of such protocol models. If an accurate analytic model is not available for the generic process component, a prediction engine, such as a neural network, is preferably used. The prediction engine is trained using the existing detailed models of network devices. Once trained, the prediction engine is used to model the generic process, and the protocol model that includes the generic component is used in lieu of the detailed models, thereby saving substantial processing time.

Modeling And Simulating Flow Propagation In Dynamic Bandwidth Systems
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US Patent:

20080120081, May 22, 2008
Filed:

Nov 16, 2007
Appl. No.:

11/941186
Inventors:

Karthikeyan CHANDRASHEKAR - Bethesda MD, US
Alain J. Cohen - McLean VA, US
Paul M. Janes - Bethesda MD, US
David Boyd - Fulton MD, US
Stefan Znam - Rockville MD, US
Pradeep Singh - Arlington VA, US
International Classification:

G06G 7/50
US Classification:

703 13
Abstract:

In a network that includes static bandwidth and dynamic bandwidth links, traffic flow at the OSI network layer is simulated at a traffic-flow level at interfaces to fixed bandwidth links, and simulated at a discrete-packet level at interfaces to dynamic bandwidth links. The resultant discrete-packet reception events at the receiving interface(s) of the dynamic bandwidth link are processed to determine the effective bandwidth/throughput of the link, as well as the allocation of this bandwidth among the individual flows through the link. The discrete-packet level receptions are used to reconstruct the parameters of the traffic flow at the network layer of the receiving interface, and this determined traffic flow is simulated accordingly at the next link, depending upon whether the next link is a static or dynamic bandwidth link.

Dedicated And Priority Based Allocation In Multi-Hop Wireless Systems
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US Patent:

20090279496, Nov 12, 2009
Filed:

May 5, 2009
Appl. No.:

12/435932
Inventors:

Majid Raissi-Dehkordi - Potomac MD, US
Karthikeyan Chandrashekar - Bethesda MD, US
Paul M. Janes - Bethesda MD, US
Ibrahim Utku Moral - Gaithersburg MD, US
Pradeep K. Singh - McLean VA, US
International Classification:

H04W 72/04
US Classification:

370329
Abstract:

A transmission channel allocation scheme for a multi-hop wireless network takes into account the priority of users, particular application requirements, applicable contractual requirements, and other factors. The channel allocation scheme determines which nodes can share a common channel for transmission without interference, and distinguishes between resources that must be dedicated to each node based on the requirements associated with each node, and the resources that are dynamically provided to each node, based on the current traffic demand. Additionally, resources that are not required to satisfy explicit requests are allocated among the nodes, thereby allowing nodes to sometimes avoid the delays associated with the access request process.

Karthikeyan Chandrashekar