Patents by Inventor Bun Lee
Bun Lee 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: 8488461Abstract: In a peer-to-peer asymmetric communication environment, an adaptive upload Data Rate Control element—called Adaptive-DRC—is used to detect increase in data return-trip time (RTT) caused by the congestion associated with the uploading of data in an uplink which in turn impacts on downloading data on an associated downlink, namely a downlink sharing resources with the uplink. Using Adaptive-DRC, the congestion is detected and thereupon adjustments to are made to allow continued communication. Adaptive-DRC comprises: (i) RTT estimation; (ii) detection of the onset of congestion, herein pre-congestion detection; and (iii) adaptation of the upload data rate limit. Two specific embodiments are contemplated, namely two versions of Adaptive-DRC wherein the difference lies in the upload data rate limit adaptation technique.Type: GrantFiled: May 12, 2011Date of Patent: July 16, 2013Assignee: The Chinese University of Hong KongInventors: Yuan Pan, Yiu Bun Lee
-
Publication number: 20130163428Abstract: Performance of transport protocols over a mobile data network is improved by a mobile accelerator, which performs protocol optimizations on-the-fly without requiring any modification to server or client protocol implementations in the operating systems of the server or client. The proposed mobile accelerator is compatible with existing TCP protocol implementations at the server and the client device, without server/client OS modification.Type: ApplicationFiled: June 22, 2012Publication date: June 27, 2013Applicant: The Chinese University of Hong KongInventors: Jack Yiu Bun Lee, Ke Liu
-
Publication number: 20130142038Abstract: In a peer-to-peer asymmetric communication environment, an adaptive upload Data Rate Control element—called Adaptive-DRC—is used to detect increase in data return-trip time (RTT) caused by the congestion associated with the uploading of data in an uplink which in turn impacts on downloading data on an associated downlink, namely a downlink sharing resources with the uplink. Using Adaptive-DRC, the congestion is detected and thereupon adjustments to are made to allow continued communication. Adaptive-DRC comprises: (i) RTT estimation; (ii) detection of the onset of congestion, herein pre-congestion detection; and (iii) adaptation of the upload data rate limit. Two specific embodiments are contemplated, namely two versions of Adaptive-DRC wherein the difference lies in the upload data rate limit adaptation technique.Type: ApplicationFiled: May 12, 2011Publication date: June 6, 2013Applicant: The Chinese University of Hong Kong, a University of Hong KongInventors: Yuan Pan, Jack Yiu Bun Lee
-
Patent number: 8325012Abstract: A method for optimizing the deployment of RFID apparatus, and a RFID deployment optimizer of use thereof are provided. The method includes the steps: A. analyzing the interrogation zone where the RFID apparatus are deployed, B. identifying the readability o RFID tag associated with different sets of placement on a target object inside the interrogation zone, and C. selecting the best deployment alternative based on the analysis result of the interrogation zone attained in the step A and all the readabilities of RFID tag associated with different sets of placement identified in the step B.Type: GrantFiled: December 27, 2007Date of Patent: December 4, 2012Assignee: PolyU Technology and Consultancy Company LimitedInventors: Siu Keung Kwok, Chi Fai Cheung, Hing Choi Tsang, Wing Bun Lee, Burly K. Tan, Pui Him Ng, Sze Kit Ho
-
Publication number: 20120163385Abstract: The apparatus, systems, and methods described herein may operate to receive at least one data packet from a transmitter connected to a first network. A packet forwarding time may be scheduled for the at least one data packet. The at least one data packet may be forwarded to a receiver connected to a second network based on the packet forwarding time such that transmission of the at least one data packet prevents a buffer overflow at the receiver.Type: ApplicationFiled: December 27, 2011Publication date: June 28, 2012Applicant: The Chinese University of Hong KongInventors: Yiu Bun Lee, Wing San Wan
-
Publication number: 20120102132Abstract: A pull-based parallel video server system and method of implementation useful in an on-demand video system includes a plurality of slave admission schedulers operating in parallel with a master admission scheduler to back up the master admission scheduler that controls access to an array of pull-based video servers according to a protocol that accounts for jitter and loss of packets, as well as network delays. A transport protocol is provided that improves video data throughput under such conditions. To determine the architecture and functional requirements of the redundant admission schedulers, an analytical tool in the form of a performance model has been developed that incorporates network delays, delay jitters and packet losses on the communication links between the clients, schedulers and servers.Type: ApplicationFiled: December 28, 2011Publication date: April 26, 2012Applicant: The Chinese University of Hong KongInventor: Yiu Bun Lee
-
Patent number: 8108480Abstract: A pull-based parallel video server system and method of implementation useful in an on-demand video system includes a plurality of slave admission schedulers operating in parallel with a master admission scheduler to back up the master admission scheduler that controls access to an array of pull-based video servers according to a protocol that accounts for jitter and loss of packets, as well as network delays. A transport protocol is provided that improves video data throughput under such conditions. To determine the architecture and functional requirements of the redundant admission schedulers, an analytical tool in the form of a performance model has been developed that incorporates network delays, delay jitters and packet losses on the communication links between the clients, schedulers and servers.Type: GrantFiled: August 3, 2010Date of Patent: January 31, 2012Assignee: The Chinese University of Hong KongInventor: Yiu Bun Lee
-
Patent number: 8055053Abstract: The present invention relates to a method of automated process control operation wherein a physical object is directed into a read zone, information stored on an ID Container attached to the physical object is retrieved, physimetric property of the physical object is captured, the retrieved information is processed to provide recorded physimetric property specific to the physical object, the recorded physimetric property and captured physimetric property are passed to an analysis algorithm for comparison, and the results of the comparison are delivered to a controlling device. The results of the comparison will determine whether the physical property will continue to pass through the read zone or require to be rotated by the operator.Type: GrantFiled: December 14, 2006Date of Patent: November 8, 2011Assignee: The Hong Kong Polytechnic UniversityInventors: Siu Keung Kwok, Chi Fai Cheung, Hing Choi Tsang, Wing Bun Lee, Burly K. Tan, Pui Him Ng
-
Publication number: 20110219142Abstract: A method and a tool based on achievable bandwidth as a metric are provided for selecting paths for overlay construction in an application layer multicast system. An in-band bandwidth probing tool according to the invention can estimate achievable bandwidth, i.e., the data throughput that can be realized between two peers over the transport protocol employed. The tool can determine the amount of extra bandwidth available in the target network path so that excess data traffic can be diverted from congested path without causing new congestion in the target path.Type: ApplicationFiled: March 1, 2011Publication date: September 8, 2011Applicant: The Chinese University of Hong KongInventors: Yangyang Lin, Yiu Bun Lee
-
Patent number: 8011803Abstract: A fog lamp may include a Lambertian LED, a collimating lens encompassing the Lambertian LED, a collimating surface including a total internal reflective surface and encompassing the collimating lens, and a corrugated surface attached to the collimating surface at an acute angle with respect to an optic axis of the corrugated surface.Type: GrantFiled: March 6, 2009Date of Patent: September 6, 2011Assignee: The Hong Kong Polytechnic UniversityInventors: Chi Fai Cheung, Sandy To, Wing Bun Lee, Jin Bo Jiang, Wen Kui Wang
-
Patent number: 7962640Abstract: Digital content is encoded and transmitted in form suitable for presentation in a variety of formats, particularly suited to mobile device environments. In specific embodiments, server-side, independent and integrated architectures are disclosed. In further specific embodiments, techniques for prefix, postfix, interrupted and midway insertions of generic data and multi-media data are disclosed together with techniques for seamlessly handling media duration, whether or not media duration is known. Still further, techniques are disclosed for retaining synchronization among inserted media segments, for reducing startup delay and for traffic smoothing, all as part of systems and techniques for media transcoding.Type: GrantFiled: May 22, 2008Date of Patent: June 14, 2011Assignee: The Chinese University of Hong KongInventor: Yiu-bun Lee
-
Publication number: 20100329117Abstract: In a packet communication system with large bandwidth delay product (BDP) and employing Transmission Control Protocol (TCP), the reported advertised window size as advertised by a receiver is employed only as an indication of window size and not as a throughput limit so that more data is sent than the amount specified by the advertised window size. Since the receiver can process all incoming TCP packets, the receiving buffer is consistently near empty. Since the TCP's advertised window size is not accepted as the absolute amount of buffer space available at the receiver, the sender is not constrained by the absolute value of the receiver's advertised window size and instead can transmit more data than the absolute value of the advertised window, enabling the system to increase the actual window size without modifying the link ends. This improved large-BDP-capable protocol is denoted TCP-SC.Type: ApplicationFiled: June 23, 2010Publication date: December 30, 2010Applicant: The Chinese University of Hong KongInventors: Jack Yiu-Bun Lee, Wing-San Wan
-
Publication number: 20100318602Abstract: A pull-based parallel video server system and method of implementation useful in an on-demand video system includes a plurality of slave admission schedulers operating in parallel with a master admission scheduler to back up the master admission scheduler that controls access to an array of pull-based video servers according to a protocol that accounts for jitter and loss of packets, as well as network delays. A transport protocol is provided that improves video data throughput under such conditions. To determine the architecture and functional requirements of the redundant admission schedulers, an analytical tool in the form of a performance model has been developed that incorporates network delays, delay jitters and packet losses on the communication links between the clients, schedulers and servers.Type: ApplicationFiled: August 3, 2010Publication date: December 16, 2010Applicant: The Chinese University of Hong KongInventor: Yiu Bun Lee
-
Publication number: 20100313096Abstract: An embodiment of the invention includes an efficient error-control system and method for recovering packet losses, especially losses in distributing multicast video over broadband residential networks. Preferably, unlike most existing error-control algorithms designed for Internet multicast, the system and method does not employ substantial feedback suppression. Preferably, the system and method does not employ substantial multicasted retransmission. Preferably, the system and method does not employ substantial parity retransmission. Preferably, the system and method does not employ substantial local loss recovery. The system and method integrates two existing classes of error-control algorithms: Automatic Repeat Request (ARQ) and Forward Error Correction (FEC), to reduce traffic overhead and achieve scalability.Type: ApplicationFiled: April 27, 2010Publication date: December 9, 2010Inventor: Jack Yiu-Bun LEE
-
Publication number: 20100289621Abstract: A method for optimizing the deployment of RFID apparatus, and a RFID deployment optimizer of use thereof are provided. The method includes the steps: A. analyzing the interrogation zone where the RFID apparatus are deployed, B. identifying the readability o RFID tag associated with different sets of placement on a target object inside the interrogation zone, and C. selecting the best deployment alternative based on the analysis result of the interrogation zone attained in the step A and all the readabilities of RFID tag associated with different sets of placement identified in the step B.Type: ApplicationFiled: December 27, 2007Publication date: November 18, 2010Applicant: THE HONG KONG POLYTECHNIC UNIVERSITYInventors: Siu Keung Kwok, Chi Fai Cheung, Hing Choi Tsang, Wing Bun Lee, Burly K. Tan, Pui Him Ng, Sze Kit Ho
-
Patent number: 7797391Abstract: A pull-based parallel video server system and method of implementation useful in an on-demand video system includes a plurality of slave admission schedulers operating in parallel with a master admission scheduler to back up the master admission scheduler that controls access to an array of pull-based video servers according to a protocol that accounts for jitter and loss of packets, as well as network delays. A transport protocol is provided that improves video data throughput under such conditions. To determine the architecture and functional requirements of the redundant admission schedulers, an analytical tool in the form of a performance model has been developed that incorporates network delays, delay jitters and packet losses on the communication links between the clients, schedulers and servers.Type: GrantFiled: September 19, 2007Date of Patent: September 14, 2010Assignee: The Chinese University of Hong KongInventor: Yiu Bun Lee
-
Publication number: 20100226143Abstract: A fog lamp may include a Lambertian LED, a collimating lens encompassing the Lambertian LED, a collimating surface including a total internal reflective surface and encompassing the collimating lens, and a corrugated surface attached to the collimating surface at an acute angle with respect to an optic axis of the corrugated surface.Type: ApplicationFiled: March 6, 2009Publication date: September 9, 2010Applicant: HONG KONG POLYTECHNIC UNIVERSITYInventors: Chi Fai Cheung, Sandy To, Wing Bun Lee, Jin Bo Jiang, Wen Kui Wang
-
Patent number: 7733911Abstract: An embodiment of the invention includes an efficient error-control system and method for recovering packet losses, especially losses in distributing multicast video over broadband residential networks. Preferably, unlike most existing error-control algorithms designed for Internet multicast, the system and method does not employ substantial feedback suppression. Preferably, the system and method does not employ substantial multicasted retransmission. Preferably, the system and method does not employ substantial parity retransmission. Preferably, the system and method does not employ substantial local loss recovery. The system and method integrates two existing classes of error-control algorithms: Automatic Repeat Request (ARQ) and Forward Error Correction (FEC), to reduce traffic overhead and achieve scalability.Type: GrantFiled: May 25, 2007Date of Patent: June 8, 2010Assignee: Sony CorporationInventor: Jack Yiu-bun Lee
-
Publication number: 20100052867Abstract: An apparatus for identifying object movement and location with RFID device comprises two RFID gateways constructed by at least one RFID interrogator located inside and outside an entrance of a monitored zone independently, a portable RFID tag carried by the object capable of receiving and responding said signals emitted by said RFID interrogator, and a data processor connected with said RFID gateways capable of receiving said responses to identify said object movement as leaving or entering said entrance and said object location as outside or inside said monitored zone. There is also a corresponding method for identifying object movement and location with RFID device.Type: ApplicationFiled: January 15, 2008Publication date: March 4, 2010Applicant: THE HONG KONG POLYTECHNIC UNIVERSITYInventors: Siu Keung Kwok, Chi Fai Cheung, Hing Choi Tsang, Wing Bun Lee, Burly K. Tan, Jay Lee, Pui Him Ng, Sze Kit Ho
-
Publication number: 20100039830Abstract: The present invention relates to LED lamps suitable for forming automotive lighting systems, made of high power lambertian LEDs and a TIR collimator lens. In the present invention, a novel TIR collimator lens is developed to collect the light emitted from the LED source and through a pillow lens array; redistribution occurs to form a light pattern meeting ECE requirements.Type: ApplicationFiled: August 18, 2008Publication date: February 18, 2010Applicant: The Hong Kong Polytechnic UniversityInventors: Chi Fai Cheung, Sandy To, Wing Bun Lee, Jin Bo Jiang, Bo Wang