Patents by Inventor Mengchen Yu

Mengchen Yu 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: 11483241
    Abstract: Systems and methods for network traffic metering credit distribution and packet processing in a network device having multiple processing units are provided. According to an embodiment, management of multiple meters is distributed among multiple processing units of a network device. Each meter is implemented in a form of a master entry and a slave entry. Responsive to receipt by one of the processing units of a packet subject to rate-limiting by a meter, an action to be taken on the packet is made with reference to a slave entry managed by the processing unit based on available credit of the slave entry. When the action indicates the packet is to be passed: (i) credits associated with passing the packet are deducted from the available credit; and (ii) the packet is passed to a subsequent stage of packet processing; otherwise, the packet is dropped.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: October 25, 2022
    Assignee: Fortinet, Inc.
    Inventors: Mengchen Yu, Guansong Zhang
  • Publication number: 20220103474
    Abstract: Systems and methods for network traffic metering credit distribution and packet processing in a network device having multiple processing units are provided. According to an embodiment, management of multiple meters is distributed among multiple processing units of a network device. Each meter is implemented in a form of a master entry and a slave entry. Responsive to receipt by one of the processing units of a packet subject to rate-limiting by a meter, an action to be taken on the packet is made with reference to a slave entry managed by the processing unit based on available credit of the slave entry. When the action indicates the packet is to be passed: (i) credits associated with passing the packet are deducted from the available credit; and (ii) the packet is passed to a subsequent stage of packet processing; otherwise, the packet is dropped.
    Type: Application
    Filed: September 30, 2020
    Publication date: March 31, 2022
    Applicant: Fortinet, Inc.
    Inventors: Mengchen Yu, Guansong Zhang
  • Patent number: 6847985
    Abstract: An iterative mantissa calculator calculates a quotient mantissa for a divide mode or a result mantissa for a square-root mode. The calculator includes at least first and second summing devices. In the divide mode, each summing device calculates a respective estimated partial remainder W[j+1] for the next iteration, j+1, as 2*W[j]?Sj+1*D, where W[j] is the estimated partial remainder for the current iteration calculated during the prior iteration, Sj+1 is the quotient bit estimated for the next iteration, and D is the respective divisor bit. The estimated quotient bit for the next iteration is selected based on the calculated partial remainder. In the square-root mode, the first summing device calculates 2W[j]?2S[j]Sj+1, where W[j] is the estimated partial remainder and Sj+1 is the estimated result generated during the current iteration, j.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: January 25, 2005
    Assignee: LSI Logic Corporation
    Inventors: Gagan V. Gupta, Mengchen Yu