1
Ashok N Rudrapatna, Dharma P Agrawal, Prathima Agrawal: Method for predicting the location of a mobile station in a mobile communications network. AT&T, April 18, 2000: US06052598 (148 worldwide citation)

The approximate position of a mobile station in a cell can be predicted by measuring the signal strength between the mobile station and the base station of the cell in which it is located and the base stations of the neighboring cells. After a series of instantaneous signal strength measurements hav ...


2
Ashok N Rudrapatna, Dharma P Agrawal, Prathima Agrawal: Intelligent dynamic channel allocation scheme for a mobile communications network. AT&T, Banner & Witcoff, February 13, 2001: US06188905 (56 worldwide citation)

Intelligent allocation of wireless resources can help avoid the problems of dropped calls in a mobile communications network. A service for allocating resources is designed to develop profiles of subscribers' mobility. That is, profiles are developed for routes, traveled by subscribers at certa ...


3
Dharma P Agrawal, Lakshmi Venkataraman: Authentication scheme for ad hoc and sensor wireless networks. University of Cincinnati, Wood Herron & Evans L, August 22, 2006: US07096359 (19 worldwide citation)

Strong authentication of packets sent between nodes of different clusters in a two-tier ad hoc network is provided by the cluster heads. Each cluster head authenticates nodes that enter the cluster. Thereafter, when a sending node requests a session from its cluster head with a receiving node in ano ...


4
Dharma P Agrawal, Hongmei Deng, Anindo Mukherjee: Threshold and identity-based key management and authentication for wireless ad hoc networks. University of Cincinnati, Dinsmore & Shohl, November 1, 2011: US08050409 (8 worldwide citation)

As various applications of wireless ad hoc network have been proposed, security has become one of the big research challenges and is receiving increasing attention. The present invention provides for a distributed key management and authentication approach by deploying the recently developed concept ...


5
Dharma P Agrawal: Apparatus for instantaneous translation of sign language. Scientific Works, Yue Ma, July 23, 2013: US08493174 (4 worldwide citation)

An apparatus for instantaneously translating sign language in to voice and video is introduced. The present invention uses accelerometer sensors to compute the position and movement of each finger, thereby instantaneously determining the posture of the hand. The location of fingers with respect to b ...


6
Dharma P Agrawal, Prathima Agrawal: Method and apparatus for spatial redundancy in cellular networks. AT&T, September 7, 1999: US05950134 (4 worldwide citation)

A cellular network includes a mobile switching center and a network of cells through which one or more mobile stations can move. Each of the cells is managed by a base station, while a plurality of base stations are controlled by a control processor within the mobile switching center. Spare stations ...


7
Dharma P Agrawal, Prathima Agrawal, Ashok N Rudrapatna: Method and apparatus for reduction of call setup time using anticipation technique for multimedia applications in widely distributed networks. AT&T, November 20, 2001: US06320847 (2 worldwide citation)

In a widely distributed digital communication network call delays and eventual outcome are anticipated (i.e., expected call outcome) at the initiation of a call at an originating terminal and the call is completed by signal switching to its destination terminal and by decreasing the number of relate ...


8
Dharma P Agrawal, Prathima Agrawal, Ashok N Rudrapatna: Method and apparatus for reduction of call setup time in widely distributed networks. At &Amp T, fu jianjun, June 30, 1999: CN98122483

A method for constituting delay and reducing call in the digital communication network, which includes steps: by performing original portion routing decision in the source concentrator, constituting original telecommunication path connection between the source concentrator and the purpose concentrat ...


9
Dharma P Agrawal, Lakshmi Venkataraman: Authentication scheme for ad hoc and sensor wireless networks. Wood Herron & Evans, September 5, 2002: US20020124169-A1

Strong authentication of packets sent between nodes of different clusters in a two-tier ad hoc network is provided by the cluster heads. Each cluster head authenticates nodes that enter the cluster. Thereafter, when a sending node requests a session from its cluster head with a receiving node in ano ...


10
Dharma P Agrawal, Carlos Cordeiro: Dual Mode Wireless Personal Area Network and Wireless Local Area Network Architecture. Dinsmore & Shohl, May 22, 2008: US20080117850-A1

Dual mode wireless radio chip having integrated circuitry enabled to provide a wireless personal area network protocol layer; a wireless local area network protocol layer; and a radio access control protocol layer having a single antenna configured to receive and forward a plurality of transmission ...