Patents by Inventor Wei-Lih Lim
Wei-Lih 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: 8934345Abstract: A station includes a reservation request transmitter, a bandwidth request transmitter, and a data transmitter. The reservation request transmitter transmits a reservation request to an access point during a contention slot specified by the access point. The contention slot is periodically allocated by the access point. The bandwidth request transmitter transmits a bandwidth request to the access point using a first allocated bandwidth allocated to the station as a response to the reservation request. The bandwidth request has a first data structure different from a second data structure of the reservation request, and includes information indicating a required bandwidth for transmitting a data to be transmitted. The data transmitter transmits the data using a second allocated bandwidth allocated to the station based on the required bandwidth.Type: GrantFiled: December 20, 2011Date of Patent: January 13, 2015Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Pek Yew Tan, Wei Lih Lim, Shinichiro Ohmi, Yasuo Harada
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Publication number: 20120087352Abstract: Method and apparatus for controlling transmission of a data stream from a station. A QoS registration frame is received, via an access point, from the station. The QoS registration frame includes information indicating a request for transmission of a data stream from the station, and information indicating a minimum required interval and a maximum required interval for an interval which is between start points of two successive durations of a medium dedication. Each duration of the medium dedication represents a time period in which the station is permitted to transmit the data stream. A schedule for the transmission of the data stream is calculated by setting a new interval which is between the minimum required interval and the maximum required interval, when the transmission is admitted.Type: ApplicationFiled: December 20, 2011Publication date: April 12, 2012Applicant: PANASONIC CORPORATIONInventors: Tan Pek Yew, Wei Lih LIM, Shinichiro OHMI, Yasuo HARADA
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Patent number: 8102808Abstract: Method and apparatus for controlling transmission of a data stream from a station. A QoS registration frame is received, via an access point, from the station. The QoS registration frame includes information indicating a request for transmission of a data stream from the station, and information indicating a minimum required interval and a maximum required interval for an interval which is between start points of two successive durations of a medium dedication. Each duration of the medium dedication represents a time period in which the station is permitted to transmit the data stream. A schedule for the transmission of the data stream is calculated by setting a new interval which is between the minimum required interval and the maximum required interval, when the transmission is admitted. A QoS response frame, which includes information indicating the schedule, is then transmitted from the access point to the station.Type: GrantFiled: March 17, 2010Date of Patent: January 24, 2012Assignee: Panasonic CorporationInventors: Pek Yew Tan, Wei Lih Lim, Shinichiro Ohmi, Yasuo Harada
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Publication number: 20100189066Abstract: Method and apparatus for controlling transmission of a data stream from a station. A QoS registration frame is received, via an access point, from the station. The QoS registration frame includes information indicating a request for transmission of a data stream from the station, and information indicating a minimum required interval and a maximum required interval for an interval which is between start points of two successive durations of a medium dedication. Each duration of the medium dedication represents a time period in which the station is permitted to transmit the data stream. A schedule for the transmission of the data stream is calculated by setting a new interval which is between the minimum required interval and the maximum required interval, when the transmission is admitted.Type: ApplicationFiled: March 17, 2010Publication date: July 29, 2010Applicant: PANASONIC CORPORATIONInventors: Pek Yew TAN, Wei Lih LIM, Shinichiro OHMI, Yasuo HARADA
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Patent number: 7499425Abstract: An efficient medium dedication schedule is generated. The schedule gives wireless medium an ability to concurrently serve real-time and non real-time application and still be able to maintain the Quality of Service as requested by the real-time application. Furthermore, QoS registration request is delivered in a time bound manner and a time slot is chosen for transmission during controlled contention phase that give lesser collision and higher throughput.Type: GrantFiled: November 8, 2002Date of Patent: March 3, 2009Assignee: Panasonic CorporationInventors: Tan Pek Yew, Wei Lih Lim, Shinichiro Ohmi, Yasuo Harada
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Patent number: 7460543Abstract: The present invention provides a method and system for efficiently scheduling wireless LAN traffic, giving the network the ability to serve both real-time and non-real time applications concurrently, while maintaining a requested level of quality of service for the real time application. It describes a method for scheduling quality of service traffic and a method to optimize this schedule thereby reducing the overall amount of time that is required for serving quality of service traffic (which is coordinated by a centralized network coordinator entity) and increasing the bandwidth available for non-real-time traffic. One application of such a scheduler would be WLANs that carry AV streams, such as may be found in a home based WLAN. Furthermore, a method is provided for announcing the schedule to all nodes in a wireless network to, for example, implement a power savings feature, thereby optimizing battery life and reducing the size and weight of portable network access terminals.Type: GrantFiled: August 13, 2003Date of Patent: December 2, 2008Assignee: Panasonic CorporationInventors: Rahul Malik, Wei Lih Lim, Pek Yew Tan
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Patent number: 7460485Abstract: The presented invention provides methods and apparatus to generate a efficient medium dedication schedule which give wireless medium the ability to serve real-time and non real-time application concurrently and still be able to maintain the QoS as requested by real-time application. Furthermore, it also presents methods for implementing buffer in an efficient matter in order to complement the advantage introduced by burst transmission and burst acknowledgement.Type: GrantFiled: September 5, 2003Date of Patent: December 2, 2008Assignee: Panasonic CorporationInventors: Pek Yew Tan, Wei Lih Lim, Yasuo Harada, Chalermphol Apichaichalermwongse, Kazuhiro Ando
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Publication number: 20080043731Abstract: A conventional packet frame includes a MAC header, one MAC service data unit (MSDU) and a frame FCS. This frame is repeated to send a plurality of MSDUs. A proposed packet frame includes a MAC header, a plurality of MSDUs and a frame FCS. A unique bit pattern is provided in the MAC header to distinguish the proposed packet frame from the conventional packet frame. Thus, the total data stream can be shortened.Type: ApplicationFiled: February 2, 2005Publication date: February 21, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Wei Lih Lim, Pek Yew Tan, Chalermphol Apichaichalermwongse, Kazuhiro Ando, Yasuo Harada
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Patent number: 7328283Abstract: A header compression/decompression apparatus that improves the throughput of an overall multilayer protocol stack at a network node. In this apparatus, an encoding section 106 compresses multilayer header information included in a protocol data unit on a multilayer protocol stack 101. A session context ID manager 112 generates a session context ID 401 which is formed by integrating information on compression of multilayer header information by the encoding section 106 and, for example, information for identifying a scheme for compressing multilayer header information.Type: GrantFiled: August 11, 2003Date of Patent: February 5, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Pek-Yew Tan, Chan-Wah Ng, Wei-Lih Lim, Toyoki Ue
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Publication number: 20070183515Abstract: The invention is to improve the throughput for a wireless transmission. Multiple antennas are activated in the same frequency at the same time to facilitate parallel transmission. A systematic processes are provided to achieve high throughput transmission.Type: ApplicationFiled: February 25, 2005Publication date: August 9, 2007Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Wei Lih Lim, Pek Yew Tan, Chalermphol Apichaichalermwongse, Kazuhiro Ando, Yasuo Harada
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Publication number: 20050083934Abstract: A header compression/decompression apparatus that improves the throughput of an overall multilayer protocol stack at a network node. In this apparatus, an encoding section 106 compresses multilayer header information included in a protocol data unit on a multilayer protocol stack 101. A session context ID manager 112 generates a session context ID 401 which is formed by integrating information on compression of multilayer header information by the encoding section 106 and, for example, information for identifying a scheme for compressing multilayer header information.Type: ApplicationFiled: August 11, 2003Publication date: April 21, 2005Inventors: Pek-Yew Tan, Chan-Wah Ng, Wei-Lih Lim, Toyoki Ue
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Publication number: 20030108059Abstract: An efficient medium dedication schedule is generated. The schedule gives wireless medium an ability to concurrently serve real-time and non real-time application and still be able to maintain the Quality of Service as requested by the real-time application. Furthermore, QoS registration request is delivered in a time bound manner and a time slot is chosen for transmission during controlled contention phase that give lesser collision and higher throughput.Type: ApplicationFiled: November 8, 2002Publication date: June 12, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Tan Pek Yew, Wei Lih Lim, Shinichiro Ohmi, Yasuo Harada