Patents by Inventor Devabhaktuni Srikrishna

Devabhaktuni Srikrishna 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).

  • Patent number: 7397789
    Abstract: A method and apparatus for generating connectivity is described. The method includes a server broadcasting a beacon including the server's address. The method further includes each client that receives the beacon rebroadcasting the beacon. The result is that each client receiving the beacon knows a way to reach the server.
    Type: Grant
    Filed: October 25, 2003
    Date of Patent: July 8, 2008
    Assignee: Tropos Networks, Inc.
    Inventors: Amalavoyal Narasimha Chari, Devabhaktuni Srikrishna
  • Patent number: 7382778
    Abstract: An embodiment includes a network of at least one router. The network includes a data packet address translator. The data packet address translator manipulates address information of data packets routed by the network, so that a network device connected to the network perceives the network to be a bridge. One embodiment of the network includes wireless mesh network that is wirelessly connectable to a client.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: June 3, 2008
    Assignee: Tropos Networks, Inc.
    Inventors: Amalavoyal Chari, Devabhaktuni Srikrishna
  • Publication number: 20080120364
    Abstract: Embodiments of methods and systems for inserting customized content into web pages viewed by users of client devices are disclosed. The method includes the wireless mesh node providing wireless access to a client device to create a connection to a wired server, and the mesh node inserting customized content into a traffic stream between the client device and the wired server, wherein the customized content is content that is tailored to an end user of the client device.
    Type: Application
    Filed: November 20, 2006
    Publication date: May 22, 2008
    Inventors: Amalavoyal Chari, Devabhaktuni Srikrishna, Prashanth Aravinda-Kumar
  • Patent number: 7376087
    Abstract: The invention includes an apparatus and method for displaying path metrics associate with nodes and links within a network. The method includes determining path metric values associated with the network. The method further includes displaying only the path metric values that fall within a predetermined set. The predetermined set can be adjustable by a network manager. The predetermined set can include an initial default value and be additionally adjusted by a network manager. The predetermined set associated with a particular node can be based upon a redundancy of paths available to the particular node.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: May 20, 2008
    Assignee: Tropos Networks, Inc.
    Inventor: Devabhaktuni Srikrishna
  • Publication number: 20080071919
    Abstract: An apparatus and method of determining link qualities of a plurality of links between an access point and a plurality of client devices is disclosed. The method includes detecting all client devices associated with the access point. A list of the associated client devices is generated. The access point transmits keep alive packets according to the list. The access point counts responds to the keep alive packets from each of the client devices. The access point estimates a link quality between the access point and each client device based on the counted responses. An apparatus and method of determining link qualities of a plurality of links between an access node of a wireless mesh network and a plurality of client devices is also disclosed. The method includes detecting all client devices associated with the access node. A list of the associated client devices is generated. The access node transmits keep alive packets to each of the associated client devices according to the list.
    Type: Application
    Filed: September 18, 2006
    Publication date: March 20, 2008
    Inventors: Mukesh Gupta, Devabhaktuni Srikrishna
  • Publication number: 20080043707
    Abstract: An apparatus and method of a gateway selecting transmission channels of a cluster of a wireless mesh network is disclosed. The cluster includes the gateway and a plurality of access nodes. The method includes the gateway cycling through a plurality of available transmission channels, evaluating channel each of the available transmission channels, and selecting a cluster transmission channel based on the channel evaluations. An apparatus and method of a node within a wireless mesh network selecting a transmission channel is also disclosed. The method includes the node cycling through a plurality of available transmission channels, measuring a persistence of successfully received routing packets from upstream devices at each of the available transmission channels, evaluating noise of each of the available transmission channels, and selecting one of the available transmission channels based on the persistence of successfully received routing packets and the noise.
    Type: Application
    Filed: August 16, 2006
    Publication date: February 21, 2008
    Inventors: Wenge Ren, Devabhaktuni Srikrishna, Cyrus Behroozi
  • Publication number: 20080025269
    Abstract: A method of adaptively setting a transmission power level of a node within a wireless mesh network is disclosed. The method includes monitoring a quality of a plurality of reverse direction links between the node and downstream nodes, and between the node and an upstream node, of the wireless mesh network. At least one worst quality reverse direction link is identified. If the at least one worst quality link is greater than a high threshold, then the transmission power level of the node is decreased. If the at least one worst quality link is less than a low threshold, then the transmission power level of the node is increased. A method of adaptively selecting transmission power of gateway nodes of a wireless mesh network is also disclosed. The method includes each gateway node monitoring a quality of a plurality of reverse direction links between the gateway node and downstream nodes of the wireless mesh network. Each gateway node identifies at least one worst quality reverse direction link.
    Type: Application
    Filed: July 26, 2006
    Publication date: January 31, 2008
    Inventors: Mukesh Gupta, Devabhaktuni Srikrishna, Wenge Ren, Cyrus Behroozi
  • Publication number: 20070201393
    Abstract: A method of optimizing link transmission parameters between access nodes within a mesh network is disclosed. The method includes each access node within the mesh transmitting packets at N different combinations of data rates and power levels. Each receiving node that receives the data packets at one or more of the N combinations, selects a most desirable one of the received combinations. The receiving nodes indicate to the transmitting nodes the selected most desired combination for transmitting to the receiving node.
    Type: Application
    Filed: February 27, 2006
    Publication date: August 30, 2007
    Inventors: Devabhaktuni Srikrishna, Cyrus Behroozi, Jay Kruse, Frederick Dean
  • Publication number: 20070099634
    Abstract: An apparatus and method of providing location information in a wireless mesh access network is disclosed. The wireless mesh network includes mesh access nodes, and provides connectivity between a client device and a destination server. The method includes providing each access nodes with its own location information. At least one of the access nodes receives an HTTP Request from the client device to a destination server. The access node, functions as an intercepting proxy and proxies the HTTP Request to the destination server. The access node further inserts a location tag carrying the location information into the proxied HTTP Request that is sent to the destination server.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 3, 2007
    Inventors: Amalavoyal Chari, Devabhaktuni Srikrishna
  • Publication number: 20070060064
    Abstract: A method of optimizing link transmission parameters between access nodes within a mesh network is disclosed. The method includes each access node within the mesh transmitting packets at N different combinations of data rates and power levels. Each receiving node that receives the data packets at one or more of the N combinations, selects a most desirable one of the received combinations. The receiving nodes indicate to the transmitting nodes the selected most desired combination for transmitting to the receiving node.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 15, 2007
    Inventors: Devabhaktuni Srikrishna, Amalavoyal Chari, Cyrus Behroozi
  • Publication number: 20060245442
    Abstract: A method of verifying a mesh network is disclosed. The method includes identifying wireless links from a set of selected mesh network routing links, that have a link quality below a predetermined quality threshold, and providing a network manager with a link list that lists and prioritizes the identified wireless links according to a degree of impact each identified wireless link has on performance of the mesh network. Determining the degree of impact of each identified wireless link can include determining an amount the mesh network relies upon identified wireless link. Mesh network reliance can be dependent on how many routes through the mesh network include the identified wireless link. Determining the degree of impact of each identified wireless link can include determining a link quality of the identified wireless link.
    Type: Application
    Filed: April 29, 2005
    Publication date: November 2, 2006
    Inventors: Devabhaktuni Srikrishna, Cyrus Behroozi
  • Publication number: 20060215605
    Abstract: It is the object of this invention to provide a method of increasing the data throughput of a multi-hop wireless link. A method is provided which mitigates self-interference, without precluding the use of omni-directional transceivers. Distributed protocols for channel allocations in a multi-hop wireless communication system are described. These protocols result in channel allocations that increase the capacity utilization of the network and render the system robust to localized interferers and jammers.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 28, 2006
    Inventors: Devabhaktuni Srikrishna, Amalavoyal Chari, Cyrus Behroozi
  • Publication number: 20060133341
    Abstract: A method that includes a client roaming from the first access node to a second access node is disclosed. The second wireless access node detects the client seeking access to the system. The second wireless access node is able to connect to the backbone network. Client information is obtained. The second wireless node provides the client a communication path to and from the destination. The communication path is able to include wired and wireless communication links. Routing of information through the communication path between the client and the destination is aided based upon detection of the client. The wireless connection between the second access node and the backbone network can include at least one wireless hop between the second access node and a fourth access node.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 22, 2006
    Inventors: Amalavoyal Chari, Devabhaktuni Srikrishna
  • Patent number: 7058021
    Abstract: The invention includes an apparatus and method for determining an optimal route based upon path quality of routes to an access node of a wireless mesh network. The method includes receiving routing packets at the access node through at least one wireless route. Each routing packet includes route information that identifies the wireless route of the routing packet. A success ratio of a number of successfully received routing packets versus a number of transmitted routing packets is determined over a period of time T1, for each wireless route. The wireless route having a greatest success ratio is first selected, as are other wireless routes that have success ratios within a predetermined amount of the greatest success ratio.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: June 6, 2006
    Assignee: Tropos Networks, Inc.
    Inventors: Devabhaktuni Srikrishna, Amalavoyal Chari
  • Publication number: 20060114881
    Abstract: An apparatus and method of selecting a routing path through a mesh network that includes a mobile access node is disclosed. The method includes each access node of the mesh network capable of receiving routing beacons from at least one upstream access node. The routing beacons including information of all upstream access nodes along a path to a gateway access node. The mobile access node selecting a route through an upstream access node based upon a quality of beacons received from at least one upstream access node, and whether the at least one upstream access node is a fixed access node or another mobile access node.
    Type: Application
    Filed: January 18, 2006
    Publication date: June 1, 2006
    Inventors: Amalavoyal Chari, Devabhaktuni Srikrishna
  • Patent number: 7031293
    Abstract: It is the object of this invention to provide a method of increasing the data throughput of a multi-hop wireless link. A method is provided which mitigates self-interference, without precluding the use of omni-directional transceivers. Distributed protocols for channel allocations in a multi-hop wireless communication system are described. These protocols result in channel allocations that increase the capacity utilization of the network and render the system robust to localized interferers and jammers.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: April 18, 2006
    Assignee: Tropos Networks, Inc.
    Inventors: Devabhaktuni Srikrishna, Amalavoyal Chari, Cyrus Behroozi
  • Patent number: 7016328
    Abstract: An apparatus and method for allowing a client to access a wireless system is disclosed. The system includes at least a first wireless access node. The method includes the first wireless access node detecting a client seeking access to the system. The first wireless access node being able to wirelessly connect to a back bone network. Client information is obtained. The first wireless node provides the client a communication path to and from a destination. The communication path is able to include wired and wireless communication links. Routing of information through the communication path between the client and the destination is aided based upon detection of the client. The wireless connection between the first access node and the back bone network can include at least one wireless hop between the first access node and a third access node.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: March 21, 2006
    Assignee: Tropos Networks, Inc.
    Inventors: Amalavoyal Chari, Devabhaktuni Srikrishna
  • Publication number: 20060018303
    Abstract: Methods and systems are disclosed for managing a network. The management includes storing configuration parameters in cells within the network, sending a commit command and a commit delay time to the cells, sensing failed reception of the commit command, and aborting the commit command if a failure is sensed.
    Type: Application
    Filed: July 21, 2004
    Publication date: January 26, 2006
    Inventors: Ridwan Peter Sugiarto, Devabhaktuni Srikrishna
  • Publication number: 20050271006
    Abstract: Embodiments of methods of assigning a channel to a link of an access node within a wireless mesh network, is disclosed. The method includes the access node receiving beacons over multiple channels, from at least one upstream device, and the access node selecting an uplink channel based upon the received beacons. Additional methods include the access node selecting a downlink channel so that different channels are assigned to consecutive links within a data path between a gateway and a down stream device. The different channels can include non-overlapping channels, or a combination of non-overlapping and at least partially overlapping channels. The method can further include selecting a downstream link channel based upon predetermined sequences of channel selections, and a hop count of the access node.
    Type: Application
    Filed: June 3, 2004
    Publication date: December 8, 2005
    Inventors: Amalavoyal Chari, Cyrus Behroozi, Devabhaktuni Srikrishna
  • Patent number: 6965575
    Abstract: The invention includes an apparatus and method for determining an optimal route based upon path quality of routes to an access node of a wireless mesh network. The method includes receiving routing packets at the access node through at least one wireless route. Each routing packet includes route information that identifies the wireless route of the routing packet. A success ratio of a number of successfully received routing packets versus a number of transmitted routing packets is determined over a period of time T1, for each wireless route. The wireless route having a greatest success ratio is first selected, as are other wireless routes that have success ratios within a predetermined amount of the greatest success ratio.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: November 15, 2005
    Assignee: Tropos Networks
    Inventors: Devabhaktuni Srikrishna, Amalavoyal Chari