Patents by Inventor Arvind Krishna

Arvind Krishna has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20070176751
    Abstract: An exemplary embodiment uses a novel adaptation of a tree splitting algorithm applied to Radio Frequency (RE) tagging technology to identify many tags in the RF field of a base station. The embodiment uses the tree splitting algorithm to identify a single tag in a field of a plurality of radio frequency tags. Once the single tag is identified, the identified tag is placed in a Data_Exchange state where the base station can access data from the tag memory by using information that identifies the tag.
    Type: Application
    Filed: January 2, 2007
    Publication date: August 2, 2007
    Inventors: Christian Cesar, Shun Chan, Thomas Colino, Kenneth Goldman, Sharon Greene, Harley Heinrich, Kevin McAuliffe, Dilip Kandlur, Arvind Krishna
  • Publication number: 20070159305
    Abstract: A system and method is disclosed for selecting certain subgroups of radio frequency (RF) tags for querying, communicating, and/or identifying by a base station. The base station sends commands to a group tags within a RF field of the base station. The tags use control logic to determine whether or not they meet certain criteria sent out by the commands. This may cause the tags to change state which either prevents or allows a given tag to participate in an identification process. In this way, a given subgroups of tags meeting certain criteria can be selected for querying, communicating, and/or identifying.
    Type: Application
    Filed: January 2, 2007
    Publication date: July 12, 2007
    Inventors: Christian Cesar, Shun-Shing Chan, Harley Heinrich, Thomas Cofino, Dilip Kandlur, Kenneth Goldman, Sharon Greene, Kevin McAuliffe, Arvind Krishna
  • Patent number: 6597671
    Abstract: In a wireless communication system (106), base stations (118, 120) are connected to a backbone network (116) such as a wired LAN and act as access points and relays for remote stations (128, 132, 136). A remote station registers and performs bidirectional communication with one of the base stations designated as its home base station. Base stations have overlapping coverage areas where a remote station is within reception range of several base stations. Such communication system may for instance be a multicell radio LAN using frequency hopping signaling. The method allows to reuse a limited number of network resources such as frequency hopping patterns and assign the same resource to several active base stations.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: July 22, 2003
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David Bantz, Frederic Bauchot, Colin Harrison, Arvind Krishna, Jose Louis Martinez, Kadathur Natarajan, Michelle Wetterwald
  • Patent number: 6459682
    Abstract: A method of controlling packet traffic in an IP network of originating, receiving and intermediate nodes to meet performance objectives established by service level agreements. Traffic statistics and performance data such as delay and loss rates relating to traffic flows are collected at intermediate nodes. A control server processes the collected data to determines data flow rates for different priorities of traffic. A static directory node is used to look up inter-node connections and determine initial traffic classes corresponding to those connections. The rates are combined with the initial traffic classes to define codes for encoding the headers of packets to determine their network priority.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: October 1, 2002
    Assignee: International Business Machines Corporation
    Inventors: Edward James Ellesson, Roch Andre Guerin, Sanjay Damodar Kamat, Arvind Krishna, Rajendran Rajan, Dinesh Chandra Verma
  • Patent number: 6243754
    Abstract: A method, apparatus and system is provided by which two or more cooperating end-users of the Internet and/or other network can dynamically select and use a single Internet or other network service provider (ISP) from among a multitude of ISPs based on the application requirements. The service provider may be selected in a dynamic fashion. This overcomes the problem wherein traditionally most end-users, whether they are individuals or organizations, are connected to the Internet or other network through a single Internet and/or other network service provider. However, users generally may have more than a single connection to the Internet and/or other network. In such cases the routing of traffic over these multiple connections is handled by IP routers based on the routing information that they exchange with their peers. This information is relatively static in nature and is typically based on the state of links that interconnect the different routers.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: June 5, 2001
    Assignee: International Business Machines Corporation
    Inventors: Roch A. Guerin, Arvind Krishna, Vinod Gerard John Peris, Dinesh Chandra Verma
  • Patent number: 6188496
    Abstract: A repeater that has a receiver for receiving a signal. A validation module determines whether a signature is present in the received signal. An invalidation module determines whether undesired signal components are present in the received signal. The received signal is transmitted if the signature is present and if the undesired signal components are not present.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: February 13, 2001
    Assignee: International Business Machines Corporation
    Inventors: Arvind Krishna, Mahmoud Naghshineh, Claus Michael Olsen
  • Patent number: 6150158
    Abstract: Methods and apparati for screening compounds for agricultural activity has now been developed which employ e.g., intact plants grown in microtiter plates on very small amounts of plant growth media containing a test compound. In comparison to the standard greenhouse screen, the microscreen requires vastly less space, labor, and test compound. However, unlike in vitro screens, responses of intact plants are assayed. Using the microscreen, high-throughput screening of test compounds can be accomplished using whole plant responses as the assay.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: November 21, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Arvind Krishna Bhide, Carol L. Bush, Theodore William Frentzel, Jr., Mary Kolean Koeppe, Louis G. Rosanio, Jr.
  • Patent number: 6101541
    Abstract: The present invention is an apparatus for controlling client node access to data items maintained in a storage device. The data items include volatile data items. The apparatus comprises a communication device for communicating with multiple client nodes; and a processor, coupled to the storage device for polling the client nodes to exchange (e.g., retrieve and/or transmit) data related to the volatile data items, via the communication device. The processing system further controls client node access to the data items of the storage device. In this way, the apparatus and method of the present invention remedies the problems associated with directory server overload.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 8, 2000
    Assignee: International Business Machines Corporation
    Inventors: Edward James Ellesson, Sanjay Damodar Kamat, Arvind Krishna, Rajendran Rajan, Dinesh Chandra Verma
  • Patent number: 6098099
    Abstract: The present invention is a directory server for monitoring network access requests, which includes a storage device for storing data items and an identifier associated with a monitoring node for at least a selected data item of the data items; a communication device for transmitting signals to the monitoring node; and a processing device, coupled to the storage device and the communication device. The processing device receives a network access request for the selected data item and, responsive to receipt of the request, automatically transmits a signal notifying the monitoring node of the request via the communication device, thereby enabling the monitoring node, e.g., a third party, to enforce traffic class priorities and access characteristics of the network.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 1, 2000
    Assignee: International Business Machines Corporation
    Inventors: Edward James Ellesson, Sanjay Damodar Kamat, Arvind Krishna, Rajendran Rajan, Dinesh Chandra Verma
  • Patent number: 5950567
    Abstract: A multiple dosage feeder for a cage is provided. The multiple dosage feeder includes a frame having a cage-interior side, a food holding member rotatably mounted on the frame, and a food presentation member disposed on the cage-interior side of the frame. The food holding member holds a plurality of measured dosages of food or other substances, and at least a portion of the food holding member extends to the cage-interior side of the frame. The food presentation member permits access to a single dosage of the plurality of dosages by an animal within the cage. At least a portion of the food holding member is rotatable within the food presentation member so as to expose the single dosage of the plurality of dosages, while the food presentation member prevents access to any remaining dosages on the cage-interior side of the frame.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: September 14, 1999
    Assignee: Lab Products, Inc.
    Inventors: John E. Sheaffer, Theodore William Frentzel, Jr., Arvind Krishna Bhide, Charles Elwood Cover
  • Patent number: 5870385
    Abstract: In a wireless communication system (106), base stations (118, 120) are connected to a backbone network (116) such as a wired LAN and act as access points and relays for remote stations (128, 132, 136). A remote station registers and performs bidirectional communication with one of the base stations designated as its home base station. Base stations have overlapping coverage areas where a remote station is within reception range of several base stations. Such communication system may for instance be a multicell radio LAN using frequency hopping signaling. The method allows reuse of a limited number of network resources such as frequency hopping patterns and assign the same resource to several active base stations.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: February 9, 1999
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David Bantz, Frederic Bauchot, Colin Harrison, Arvind Krishna, Jose Louis Martinez, Kadathur Natarajan, Michelle Wetterwald
  • Patent number: 5781536
    Abstract: In a wireless communication system (106), base stations (118, 120) are connected to a backbone network (116) such as a wired LAN and act as access points and relays for remote stations (128, 132, 136). A remote station registers and performs bidirectional communication with one of the base stations designated as its home base station. Base stations have overlapping coverage areas where a remote station is within reception range of several base stations. Such communication system may for instance be a multicell radioLAN using frequency hopping signaling. The method allows reuse of a limited number of network resources such as frequency hopping patterns and assign the same resource to several active base stations.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 14, 1998
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David Bantz, Frederic Bauchot, Colin Harrison, Arvind Krishna, Jose Louis Martinez, Kadathur Natarajan, Michelle Wetterwald
  • Patent number: 5613198
    Abstract: A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then is dynamically allocated by time division to each of the cells in the assigned group according to user demand in each of the cells thereof.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: March 18, 1997
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Amotz Bar-Noy, Ilan Kessler, Arvind Krishna
  • Patent number: 5550547
    Abstract: The present invention uses a novel adaptation of a tree splitting algorithm applied to Radio Frequency (RF) tagging technology to identify many tags in the RF field of a base station.The invention uses the tree splitting algorithm to identify a single tag in a field of a plurality of radio frequency tags. Once the single tag is identified, the identified tag is placed in a Data.sub.-- Exchange state where the base station can access data from the tag memory by using information that identifies the tag.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: August 27, 1996
    Assignee: International Business Machines Corporation
    Inventors: Shun S. Chan, Harley K. Heinrich, Dilip D. Kandlur, Arvind Krishna
  • Patent number: 5533026
    Abstract: A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: July 2, 1996
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Frederic J. Bauchot, Roselyne Bonnet, Ilan Kessler, Arvind Krishna, Fabien P. Lanne, Mahmoud Naghshineh, Catherine Solar, Michelle M. Wetterwald
  • Patent number: 5521601
    Abstract: This invention provides a tag identification system and method for identifying tags in the range of a reader station where the tags are divided into smaller groups, where the tags are identified one group at a time so as to save power by powering off the tags that are not in the group currently being identified. Each tag puts itself in a group by performing calculations from parameters stored in itself and from parameters received from the reader station. In another variation of this invention, only tags which configure themselves to be activated at a final frequency are identified. The set of tags which configure themselves to be activated at the final frequency changes with each identification round until all tags in the range of the reader have been identified.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: May 28, 1996
    Assignee: International Business Machines Corporation
    Inventors: Dilip D. Kandlur, Arvind Krishna
  • Patent number: 5490139
    Abstract: A method of routing packets through a fixed source routing communications network from and to mobile units. With this invention an initial access point is determined when a communications session is established to or from a mobile unit through the network. Location information is updated each time the mobile unit moves out of the range of one access point and into the range of another access point of the network. When packets for the session are to be transmitted to the mobile unit from the wired network, the packets are forwarded from the initial access point to a current access point, which by definition is in the range of the mobile unit. When packets for the session are to be transmitted from the mobile unit and to the wired network, the access point intercepts these packets and routes them to their destination and/or initiates route discovery to those destinations. When packets are to be transmitted between mobiles at different access points.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: February 6, 1996
    Assignee: International Business Machines Corporation
    Inventors: Murray C. Baker, Partha P. Bhattacharya, Jeane S.-C. Chen, Roger Y. M. Cheung, Arvind Krishna, Peter E. Reissner, Mahmoud Naghshineh
  • Patent number: 5384777
    Abstract: A Medium Access (MAC) Protocol is utilized for wireless radio access for a plurality of remote stations to a base station on a LAN. There is a time division fixed frame structure in which time is slotted, and time slots are grouped into fixed frames consisting of data and control subframes or periods. The fixed frame structure consists of three periods (A, B, and C) along with their respective headers. The first period, the A period, is used exclusively for data transfer from the base station to the remote stations. The following period, the B period, is used for contention-free data transfer from the remote stations to the base station. The allocation of the data slots in the A and B periods is performed by the base station. The last period of the frame, designated as the C period, is used for the transmission of reservation requests and data from the remote stations to the base station in a random-access contention mode using a slotted Aloha protocol.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: January 24, 1995
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David F. Bantz, Frederic J. Bauchot, Arvind Krishna, Richard O. La Maire, Kadathur S. Natarajan