Search Results - xiang-yang liu

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Location Based Notifications for a Smartphone

Executive SummaryDifferent surfaces respond to the same vibration differently. Vibration based sensing is a low-cost and effective approach to recognizing different surfaces. Prior methods use custom hardware for creating and sensing vibration, making them difficult to adopt. This method uses the smartphone’s vibrator motor to cause the whole...
Published: 8/5/2019   |   Inventor(s): Kamran Ali, Xiang-Yang Liu
Keywords(s):   Category(s): Computer Software, Data Processing/Analysis, Devices

Recognizing Keystrokes Using Wi-Fi Signals

Executive SummaryWhen a user moves their fingers to type, it creates a disturbance in the Wi-Fi signal that is unique and can be determined by analyzing the CSI-Waveform from the Wi-fi card. Our technology is able to detect and identify small movements of the hand by using a commercial Wi-Fi router and laptop. This technology can be used to determine...
Published: 6/3/2016   |   Inventor(s): Xiang-Yang Liu, Kamran Ali, Wei Wang
Keywords(s):   Category(s): Computer Hardware, Control Systems

An Automated Cheating Detection System for Online Exams

Executive SummaryThe growth of online courses offered for credit heavily depends on innovations in the online proctoring industry to provide accurate, yet flexible remote examination. Current software-based online proctoring systems do not sufficiently monitor and inhibit cheating behavior in high stake online exams as they only rely on the narrow...
Published: 6/3/2016   |   Inventor(s): Stephen Hsu, Xiaoming Liu, Xiang-Yang Liu
Keywords(s):   Category(s): Computer Software, Telecommunications and Internet, Test and Measurement

Intrusion Detection and Prevention System

Executive SummaryDeep packet inspection (DPI) filters computer network packets and examines the data in a packet, performing searches for viruses, spam, or other intrusions. DPI can be implemented on routers, network intrusion detection systems, firewalls and switches but detecting multiple patterns in parallel requires a significant amount of memory...
Published: 5/26/2016   |   Inventor(s): Xiang-Yang Liu, Eric Torng
Keywords(s):   Category(s): Telecommunications and Internet

Adaptive Channel Bonding in Multicarrier Wireless Networks

IntroductionTo support high data rate applications such as video conferencing and multimedia streaming, the ongoing standardization of the next generation Wi-Fi increases the channel bonding. However, inefficiency and unfairness issues arise when devices that use different channel widths coexist in a contention domain. Instead of increasing channel...
Published: 4/12/2016   |   Inventor(s): Pei Huang, Xi Yang, Li Xiao
Keywords(s):   Category(s): Computer Hardware, Communication

Collision Detection and Bitwise Arbitration for Multicarrier Wireless Networks

IntroductionThe two main tasks that occur during wireless-communication data transmissions are the transmission of the data, and the resolution of conflicts caused by data collisions. Current data-transmission technology can only handle one data packet at a time. Data collisions occur when two or more data packets attempt to simultaneously use the same...
Published: 4/8/2016   |   Inventor(s): Li Xiao, Xi Yang, Pei Huang
Keywords(s):   Category(s): Computer Hardware, Telecommunications and Internet

A High-Speed Grammar Aware Application Protocol Parsing Algorithm for Networking and Security Devices

IntroductionThere is an increasing desire to create content aware networks that can improve data delivery by classifying and controlling messages based on content, application, and individual subscribers. There is also a need to improve network security via content-based monitoring and filtering. Building content aware networks requires both advanced...

A Systematic Approach to Minimizing Packet Classifiers in TCAMs

IntroductionPacket classification enables many networking services on the Internet, such as firewall packet filtering and traffic accounting. Using Ternary Content Addressable Memory (TCAM) chips to perform high-speed packet classification has become the de facto standard in industry. TCAM chips classify packets by comparing a packet with the full suite...
Published: 2/25/2011   |   Inventor(s): Xiang-Yang Liu, Eric Torng, Chad Meiners
Keywords(s): Packet Classification, Routers, Switches, TCAM Category(s): Communication, Computer Software

A Systematic Non-Prefix Approach to Minimizing Packet Classifiers in TCAMs

IntroductionPacket classification enables many networking services on the Internet, such as firewall packet filtering and traffic accounting. Using Ternary Content Addressable Memory (TCAM) chips to perform high-speed packet classification has become the de facto standard in industry. TCAM chips classify packets by comparing a packet with the full suite...
Published: 2/25/2011   |   Inventor(s): Xiang-Yang Liu, Eric Torng, Chad Meiners
Keywords(s): Packet Classification, Routers, Switches, TCAM Category(s): Communication, Computer Software

Efficient TCAM-based Packet Classification Using Multiple Lookups and Classifier Semantics

IntroductionPacket classification enables many networking services on the Internet, such as firewall packet filtering and traffic accounting. Using Ternary Content Addressable Memory (TCAM) chips to perform high-speed packet classification has become the de facto standard in industry. TCAM chips classify packets by comparing a packet with the full suite...
Published: 2/25/2011   |   Inventor(s): Xiang-Yang Liu, Eric Torng, Chad Meiners
Keywords(s): Packet Classification, Routers, Switches, TCAM Category(s): Communication, Computer Software