Patents by Inventor Liang-Chih Yuan

Liang-Chih Yuan 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: 20240114355
    Abstract: Examples provide new roaming test systems for network deployments that can be implemented remotely using a single physical AP. Examples achieve this elegant system by emulating a physical network deployment using a group of VAPs provisioned on the single physical AP (a VAP may refer to a logical or a virtual AP instance on a physical AP). Each VAP of CAP group may be configured to represent a physical AP of the physical network deployment (such a network deployment may be a prospective deployment or, an actual/set-up deployment). Examples can simulate/emulate a wireless client physically moving between physical APs of the network deployment by varying transmission power associated with each VAP as a function of time in a manner that mirrors how a wireless client would perceive transmission power varying for physical APs of the network deployment (represented by the VAPs) as the wireless client moves across the geographical site of the network deployment.
    Type: Application
    Filed: October 4, 2022
    Publication date: April 4, 2024
    Inventors: TEJAS SATHE, AMOGH GURUPRASAD DESHMUKH, LIANG-CHIH YUAN
  • Patent number: 9531700
    Abstract: A system and method is described that allows the assignment of roles and/or VLANs to an authenticated client device even when an external remote authentication dial in user service (RADIUS) server is inaccessible. In particular, using RADIUS key-reply attributes stored locally after a previous successful authentication using the external RADIUS server, an internal RADIUS server may perform authentication and pass the stored RADIUS key-reply attributes to an authentication module for assignment of a role and/or VLAN to the client device. Accordingly, roles and/or VLANs may be assigned to enforce access privileges of the client device even when an external RADIUS server is inaccessible.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: December 27, 2016
    Assignee: Aruba Networks, Inc.
    Inventors: Liang-Chih Yuan, Vikram Limaye, Ashutosh Nasikkar
  • Publication number: 20160226848
    Abstract: A system and method is described that allows the assignment of roles and/or VLANs to an authenticated client device even when an external remote authentication dial in user service (RADIUS) server is inaccessible. In particular, using RADIUS key-reply attributes stored locally after a previous successful authentication using the external RADIUS server, an internal RADIUS server may perform authentication and pass the stored RADIUS key-reply attributes to an authentication module for assignment of a role and/or VLAN to the client device. Accordingly, roles and/or VLANs may be assigned to enforce access privileges of the client device even when an external RADIUS server is inaccessible.
    Type: Application
    Filed: January 30, 2015
    Publication date: August 4, 2016
    Inventors: Liang-Chih Yuan, Vikram Limaye, Ashutosh Nasikkar
  • Patent number: 8707020
    Abstract: A MACSec packet exposes selected tags in front of the MACSec tag. Different embodiments are directed to methods and apparatuses of various network nodes, that send, forward, and receive packets. Anther embodiment is the MACSec data structure on a computer readable medium. Another embodiment is the upgrade process of a legacy network.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: April 22, 2014
    Assignee: ClearCrypt, Inc.
    Inventors: Gabor Lengyel, Ramana Devarapalli, Liang-Chih Yuan
  • Patent number: 7240068
    Abstract: The present invention relates to the field of software-based services in communication networks. More particularly, it includes systems and methods for maintaining and utilizing routing data to handle event notifications generated by call handling in a service logic execution environment. Particular aspects of the present invention are described in the claims, specification and drawings.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: July 3, 2007
    Assignee: TrueTel Communications, Inc.
    Inventors: Willie Hsu, Tsui-Yu Shuai, Anand Katakwar, Liang-Chih Yuan
  • Publication number: 20040098396
    Abstract: The present invention relates to the field of software-based services in communication networks. More particularly, it includes systems and methods for maintaining and utilizing routing data to handle event notifications generated by call handling in a service logic execution environment. Particular aspects of the present invention are described in the claims, specification and drawings.
    Type: Application
    Filed: March 24, 2003
    Publication date: May 20, 2004
    Inventors: Willie Hsu, Tsui-Yu Shuai, Anand Katakwar, Liang-Chih Yuan