Patents by Inventor Raghuveer Chereddy
Raghuveer Chereddy 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).
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Patent number: 8498279Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: GrantFiled: June 9, 2008Date of Patent: July 30, 2013Assignee: Siemens AktiengesellschaftInventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Patent number: 8411663Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: GrantFiled: June 9, 2008Date of Patent: April 2, 2013Assignee: Siemens AktiengesellschaftInventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Patent number: 8218600Abstract: A system and method for operating a communications system network, the method including operating an access point (AP) acting as a network controller in a frequency hopping network, the AP communicating with other communication devices of the network over m number of frequencies using a hopping sequence of at least some of the m number of frequencies and a dwell time d for the plurality of frequencies; and operating a communication device seeking to establish synchronized communication with other communication devices of the frequency hopping network without any cross-AP coordination, the communication device scanning all of the m number of frequencies using a scanning time s for each of the m number of frequencies; and, wherein the scanning time s is no greater than 1/m of the AP dwell time d.Type: GrantFiled: December 18, 2008Date of Patent: July 10, 2012Assignee: Siemens AktiengesellschaftInventors: Hoi-Sheung Wilson So, Raghuveer Chereddy, Raymond Rui-Feng Liao
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Patent number: 8149893Abstract: A method and system, the method including determining a frequency quality measurement value for each of a plurality of frequencies a network coordinator can use in a frequency hopping sequence for communicating with a client, classifying each of the plurality of communication frequencies into one of a plurality of different categories based on a relative ranking of the determined frequency quality measurement value of each of the plurality of frequencies, generating, by the network coordinator, a frequency hopping sequence to be used for communication between the network coordinator and the client, the generated hopping sequence including only select frequencies from the plurality of frequencies in a predetermined number of future time slots that minimize a probability of a predetermined number of consecutive frequency hop failures in the predetermined number of future time slots, and notifying the client of the generated frequency hopping sequence to be used for communication.Type: GrantFiled: December 18, 2008Date of Patent: April 3, 2012Assignee: Siemens AktiengesellschaftInventors: Hoi-Sheung Wilson So, Raghuveer Chereddy, Raymond Rui-Feng Liao
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Patent number: 8125955Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: GrantFiled: June 9, 2008Date of Patent: February 28, 2012Assignee: Siemens AktiengesellschaftInventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Patent number: 7969878Abstract: A shared wireless channel may serve real-time traffic and non-real-time traffic. Depending on channel conditions, the real-time traffic may experience variable levels of quality. The present invention contemplates systems and methods for guaranteeing bounded access time for real-time applications in a shared wireless network in the presence of non-real-time traffic. The systems and methods provide mechanisms to adapt to changing characteristics of wireless channels and to maximize throughput of non-real-time traffic while preserving the quality of real-time applications. The systems and methods may be extended generally to provide adaptive control over the delivery of multiple classes of traffic to protect the quality of critical applications over a shared transmission medium, including IEEE 802.11 networks, IEEE 802.16 networks, and DOCSIS networks.Type: GrantFiled: September 11, 2006Date of Patent: June 28, 2011Assignee: Siemens Enterprise Communications GmbH & Co. KGInventors: Ayman Fawaz, Teresa Tung, Raghuveer Chereddy
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Patent number: 7724766Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: GrantFiled: March 31, 2005Date of Patent: May 25, 2010Assignee: Siemens AktiengesellschaftInventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Publication number: 20100046585Abstract: A system and method for operating a communications system network, the method including operating an access point (AP) acting as a network controller in a frequency hopping network, the AP communicating with other communication devices of the network over m number of frequencies using a hopping sequence of at least some of the m number of frequencies and a dwell time d for the plurality of frequencies; and operating a communication device seeking to establish synchronized communication with other communication devices of the frequency hopping network without any cross-AP coordination, the communication device scanning all of the m number of frequencies using a scanning time s for each of the m number of frequencies; and, wherein the scanning time s is no greater than 1/m of the AP dwell time d.Type: ApplicationFiled: December 18, 2008Publication date: February 25, 2010Inventors: Hoi-Sheung Wilson So, Raghuveer Chereddy, Raymond Rui-Feng Liao
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Publication number: 20100046583Abstract: A method and system, the method including determining a frequency quality measurement value for each of a plurality of frequencies a network coordinator can use in a frequency hopping sequence for communicating with a client, classifying each of the plurality of communication frequencies into one of a plurality of different categories based on a relative ranking of the determined frequency quality measurement value of each of the plurality of frequencies, generating, by the network coordinator, a frequency hopping sequence to be used for communication between the network coordinator and the client, the generated hopping sequence including only select frequencies from the plurality of frequencies in a predetermined number of future time slots that minimize a probability of a predetermined number of consecutive frequency hop failures in the predetermined number of future time slots, and notifying the client of the generated frequency hopping sequence to be used for communication.Type: ApplicationFiled: December 18, 2008Publication date: February 25, 2010Inventors: Hoi-Sheung Wilson So, Raghuveer Chereddy, Raymond Rui-Feng Liao
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Publication number: 20080274741Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: ApplicationFiled: June 9, 2008Publication date: November 6, 2008Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Publication number: 20080240071Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: ApplicationFiled: June 9, 2008Publication date: October 2, 2008Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Publication number: 20080240069Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: ApplicationFiled: June 9, 2008Publication date: October 2, 2008Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Publication number: 20080240042Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: ApplicationFiled: June 9, 2008Publication date: October 2, 2008Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler
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Publication number: 20070253332Abstract: A shared wireless channel may serve real-time traffic and non-real-time traffic. Depending on channel conditions, the real-time traffic may experience variable levels of quality. The present invention contemplates systems and methods for guaranteeing bounded access time for real-time applications in a shared wireless network in the presence of non-real-time traffic. The systems and methods provide mechanisms to adapt to changing characteristics of wireless channels and to maximize throughput of non-real-time traffic while preserving the quality of real-time applications. The systems and methods may be extended generally to provide adaptive control over the delivery of multiple classes of traffic to protect the quality of critical applications over a shared transmission medium, including IEEE 802.11 networks, IEEE 802.16 networks, and DOCSIS networks.Type: ApplicationFiled: September 11, 2006Publication date: November 1, 2007Applicant: SIEMENS TECHNOLOGY-TO-BUSINESS CENTER, LLCInventors: Ayman Fawaz, Teresa Tung, Raghuveer Chereddy
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Publication number: 20060221993Abstract: A data communication system includes an access point and a plurality of stations each for exchanging wireless data communication messages with the access point. At least some of the messages are in a format that includes at least one message header and a plurality of data units. Each of the data units includes a respective data unit header and a respective data frame. Each data unit header identifies a respective one of the stations as a recipient to receive the respective data frame of the data unit.Type: ApplicationFiled: March 31, 2005Publication date: October 5, 2006Inventors: Raymond Liao, Raghuveer Chereddy, Joerg Mueller, Stefan Keller, Kai Benjamins, Christoph Weiler