Patents by Inventor How Tung Lim
How Tung Lim 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: 12255874Abstract: Techniques for securing control and user plane separation in mobile networks (e.g., service provider networks for mobile subscribers, such as for 4G/5G networks) are disclosed. In some embodiments, a system/process/computer program product for securing control and user plane separation in mobile networks in accordance with some embodiments includes monitoring network traffic on a mobile network at a security platform to identify an Packet Forwarding Control Protocol (PFCP) message associated with a new session, in which the mobile network includes a 4G network or a 5G network; extracting a plurality of parameters from the PFCP message at the security platform; and enforcing a security policy at the security platform on the new session based on one or more of the plurality of parameters to secure control and user plane separation in the mobile network.Type: GrantFiled: May 8, 2023Date of Patent: March 18, 2025Assignee: Palo Alto Networks, Inc.Inventors: Leonid Burakovsky, Sachin Verma, Fengliang Hu, I-Chun Chen, How Tung Lim
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Publication number: 20230412566Abstract: Techniques for securing control and user plane separation in mobile networks (e.g., service provider networks for mobile subscribers, such as for 4G/5G networks) are disclosed. In some embodiments, a system/process/computer program product for securing control and user plane separation in mobile networks in accordance with some embodiments includes monitoring network traffic on a mobile network at a security platform to identify an Packet Forwarding Control Protocol (PFCP) message associated with a new session, in which the mobile network includes a 4G network or a 5G network; extracting a plurality of parameters from the PFCP message at the security platform; and enforcing a security policy at the security platform on the new session based on one or more of the plurality of parameters to secure control and user plane separation in the mobile network.Type: ApplicationFiled: May 8, 2023Publication date: December 21, 2023Inventors: Leonid Burakovsky, Sachin Verma, Fengliang Hu, I-Chun Chen, How Tung Lim
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Patent number: 11689502Abstract: Techniques for securing control and user plane separation in mobile networks (e.g., service provider networks for mobile subscribers, such as for 4G/5G networks) are disclosed. In some embodiments, a system/process/computer program product for securing control and user plane separation in mobile networks in accordance with some embodiments includes monitoring network traffic on a mobile network at a security platform to identify an Packet Forwarding Control Protocol (PFCP) message associated with a new session, in which the mobile network includes a 4G network or a 5G network; extracting a plurality of parameters from the PFCP message at the security platform; and enforcing a security policy at the security platform on the new session based on one or more of the plurality of parameters to secure control and user plane separation in the mobile network.Type: GrantFiled: June 30, 2020Date of Patent: June 27, 2023Assignee: Palo Alto Networks, Inc.Inventors: Leonid Burakovsky, Sachin Verma, Fengliang Hu, I-Chun Chen, How Tung Lim
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Publication number: 20210409375Abstract: Techniques for securing control and user plane separation in mobile networks (e.g., service provider networks for mobile subscribers, such as for 4G/5G networks) are disclosed. In some embodiments, a system/process/computer program product for securing control and user plane separation in mobile networks in accordance with some embodiments includes monitoring network traffic on a mobile network at a security platform to identify an Packet Forwarding Control Protocol (PFCP) message associated with a new session, in which the mobile network includes a 4G network or a 5G network; extracting a plurality of parameters from the PFCP message at the security platform; and enforcing a security policy at the security platform on the new session based on one or more of the plurality of parameters to secure control and user plane separation in the mobile network.Type: ApplicationFiled: June 30, 2020Publication date: December 30, 2021Inventors: Leonid Burakovsky, Sachin Verma, Fengliang Hu, I-Chun Chen, How Tung Lim
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Patent number: 8880494Abstract: A LPM search engine includes a plurality of exact match (EXM) engines and a moderately sized TCAM. Each EXM engine uses a prefix bitmap scheme that allows the EXM engine to cover multiple consecutive prefix lengths. Thus, instead of covering one prefix length L per EXM engine, the prefix bitmap scheme enables each EXM engine to cover entries having prefix lengths of L, L+1, L+2 and L+3, for example. As a result, fewer EXM engines are potentially underutilized, which effectively reduces quantization loss. Each EXM engine provides a search result with a determined fixed latency when using the prefix bitmap scheme. The results of multiple EXM engines and the moderately sized TCAM are combined to provide a single search result, representative of the longest prefix match. In one embodiment, the LPM search engine supports 32-bit IPv4 (or 128-bit IPv6) search keys, each having associated 15-bit level 3 VPN identification values.Type: GrantFiled: October 28, 2011Date of Patent: November 4, 2014Assignee: Brocade Communications Systems, Inc.Inventors: Jian Liu, Philip Lynn Leichty, How Tung Lim, John Michael Terry, Mahesh Srinivasa Maddury, Wing Cheung, Kung Ling Ko
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Patent number: 8457017Abstract: The present invention provides a system, apparatus and method for providing point-to-point inter-chassis connections within chassis systems and/or network nodes. Multi-chassis systems within a network employ a protocol wherein a peer discovery process is initiated and the discovered neighbors are authentically verified before establishing an active state between point-to-point inter-chassis links.Type: GrantFiled: June 26, 2006Date of Patent: June 4, 2013Assignee: Infinera CorporationInventors: Biao Lu, Vinay Ravuri, How Tung Lim, Kamran Farshchi, Yatindra Chugh, Sharfuddin Syed
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Publication number: 20130031077Abstract: A LPM search engine includes a plurality of exact match (EXM) engines and a moderately sized TCAM. Each EXM engine uses a prefix bitmap scheme that allows the EXM engine to cover multiple consecutive prefix lengths. Thus, instead of covering one prefix length L per EXM engine, the prefix bitmap scheme enables each EXM engine to cover entries having prefix lengths of L, L+1, L+2 and L+3, for example. As a result, fewer EXM engines are potentially underutilized, which effectively reduces quantization loss. Each EXM engine provides a search result with a determined fixed latency when using the prefix bitmap scheme. The results of multiple EXM engines and the moderately sized TCAM are combined to provide a single search result, representative of the longest prefix match. In one embodiment, the LPM search engine supports 32-bit IPv4 (or 128-bit IPv6) search keys, each having associated 15-bit level 3 VPN identification values.Type: ApplicationFiled: October 28, 2011Publication date: January 31, 2013Applicant: Brocade Communications Systems, Inc.Inventors: Jian Liu, Philip Lynn Leichty, How Tung Lim, John Michael Terry, Mahesh Srinivasa Maddury, Wing Cheung, Kung Ling Ko
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Patent number: 7970114Abstract: A system, apparatus and method are described for displaying multiple attributes relative to objects in a network management program. In one embodiment, multiple attributes from a plurality of different standards are coalesced together and the coalesced attributes are displayed by a user interface. These coalesced attributes may be shown in such a manner so that inconsistencies between attributes of objects from different standards are reduced or obviated.Type: GrantFiled: June 26, 2006Date of Patent: June 28, 2011Assignee: Infinera CorporationInventors: Sriram Subramanian, Rajasekar Venkatesan, Christopher C. Liou, Anthony W. Jorgenson, How Tung Lim, Sharfuddin Syed, Daniel P. Murphy, Steven Joseph Hand
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Patent number: 7792017Abstract: A system, apparatus, and method for providing a plurality of internal VLANs within a networking element/node are described. Internal VLAN topologies are provisioned so that a particular VLAN(S) communicate traffic to corresponding applications. This segregation of internal traffic across a VLAN topology reduces the amount of interference between the traffic. Redundancy across the VLAN topology is provided so that traffic may be switched to another path in the event of a failure.Type: GrantFiled: April 28, 2006Date of Patent: September 7, 2010Assignee: Infinera CorporationInventors: Biao Lu, Vinay Ravuri, How Tung Lim, Kamran Farshchi
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Patent number: 7783746Abstract: A system, apparatus and a method are described that synchronizes multiple element management systems with a network element. The synchronization between the management entities within the element is maintained by employing special attributes, such as sentry identification for managed objects and guard attributes for managed object tables. Using these attributes, resynchronization between the management systems is improved by reducing the amount of data retrieved by the systems and reducing the processing load caused by the resynchronization process.Type: GrantFiled: June 26, 2006Date of Patent: August 24, 2010Assignee: Infinera CorporationInventors: Steven Joseph Hand, How Tung Lim, Kasi Pydi Viswanadham, Kiran Dintakurthi
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Publication number: 20070150620Abstract: A system, apparatus and a method are described that synchronizes multiple element management systems with a network element. The synchronization between the management entities within the element is maintained by employing special attributes, such as sentry identification for managed objects and guard attributes for managed object tables. Using these attributes, resynchronization between the management systems is improved by reducing the amount of data retrieved by the systems and reducing the processing load caused by the resynchronization process.Type: ApplicationFiled: June 26, 2006Publication date: June 28, 2007Applicant: INFINERA CORPORATIONInventors: Steven Hand, How Tung Lim, Kasi Pydi Viswanadham, Kiran Dintakurthi
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Publication number: 20070100887Abstract: A system, apparatus and method are described for displaying multiple attributes relative to objects in a network management program. In one embodiment, multiple attributes from a plurality of different standards are coalesced together and the coalesced attributes are displayed by a user interface. These coalesced attributes may be shown in such a manner so that inconsistencies between attributes of objects from different standards are reduced or obviated.Type: ApplicationFiled: June 26, 2006Publication date: May 3, 2007Applicant: Infinera CorporationInventors: Sriram Subramanian, Rajasekar Venkatesan, Christopher Liou, Anthony Jorgenson, How Tung Lim, Sharfuddin Syed, Daniel Murphy, Steven Hand
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Publication number: 20070019642Abstract: A system, apparatus, and method for providing a plurality of internal VLANs within a networking element/node are described. Internal VLAN topologies are provisioned so that a particular VLAN(S) communicate traffic to corresponding applications. This segregation of internal traffic across a VLAN topology reduces the amount of interference between the traffic. Redundancy across the VLAN topology is provided so that traffic may be switched to another path in the event of a failure.Type: ApplicationFiled: April 28, 2006Publication date: January 25, 2007Applicant: Infinera CorporationInventors: Biao Lu, Vinay Ravuri, How Tung Lim, Kamran Farshchi
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Publication number: 20070005968Abstract: The present invention provides a system, apparatus and method for providing point-to-point inter-chassis connections within chassis systems and/or network nodes. Multi-chassis systems within a network employ a protocol wherein a peer discovery process is initiated and the discovered neighbors are authentically verified before establishing an active state between point-to-point inter-chassis links.Type: ApplicationFiled: June 26, 2006Publication date: January 4, 2007Applicant: INFINERA CORPORATIONInventors: Biao Lu, Vinay Ravuri, How Tung Lim, Kamran Farshchi, Yatindra Chugh, Sharfuddin Syed