Patents by Inventor Sumei Sun

Sumei Sun 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: 11057879
    Abstract: A system for controlling a network is provided. The system may include a circuit configured to provide interface support to a plurality of remote radio heads. Each remote radio head may support multiple radio access technologies. The system may include a controller configured to control the circuit and the plurality of remote radio heads. The controller may be configured to control the circuit and the plurality of remote radio heads based on statistical information inferred from the data traversing through the circuit and the real time network state information of the network. The circuit may be connected to each remote radio head of the plurality of remote radio heads via one or more respective fronthaul links.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: July 6, 2021
    Assignee: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Sumei Sun, Ernest Kurniawan, Ho Huat Peh, Peng Hui Tan, Koichi Adachi, Jin Gon Joung
  • Publication number: 20210091942
    Abstract: There is provided a method of generating a secret key at a first node for data communication between the first node and a second node. The method includes obtaining a channel estimate of a communication channel between the first and second nodes; obtaining a time-frequency matrix associated with the communication channel based on a time-frequency transformation of the channel estimate; and producing the secret key based on the time-frequency matrix. There is also provided a corresponding key generator for generating a secret key.
    Type: Application
    Filed: March 28, 2018
    Publication date: March 25, 2021
    Inventors: Duy Hieu Nguyen, Sumei Sun, Yong Dong Wu, Boon Shyang Lim
  • Patent number: 10470179
    Abstract: According to various embodiments, a radio communication method may be provided. The radio communication method may include: determining in a cell at least one first subframe; determining in the cell at least one second subframe; allocating downlink user traffic in the cell during the first subframe with a low priority; and transmitting a handover command to a user equipment based on the second subframe.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: November 5, 2019
    Assignee: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Koichi Adachi, Jin Gon Joung, Yuan Zhou, Sumei Sun
  • Publication number: 20190124648
    Abstract: A system for controlling a network is provided. The system may include a circuit configured to provide interface support to a plurality of remote radio heads. Each remote radio head may support multiple radio access technologies. The system may include a controller configured to control the circuit and the plurality of remote radio heads. The controller may be configured to control the circuit and the plurality of remote radio heads based on statistical information inferred from the data traversing through the circuit and the real time network state information of the network. The circuit may be connected to each remote radio head of the plurality of remote radio heads via one or more respective fronthaul links.
    Type: Application
    Filed: March 29, 2017
    Publication date: April 25, 2019
    Inventors: Sumei SUN, Ernest KURNIAWAN, Ho Huat PEH, Peng Hui TAN, Koichi ADACHI, Jin Gon JOUNG
  • Publication number: 20180077704
    Abstract: According to various embodiments, a radio communication method may be provided. The radio communication method may include: determining in a cell at least one first subframe; determining in the cell at least one second subframe; allocating downlink user traffic in the cell during the first subframe with a low priority; and transmitting a handover command to a user equipment based on the second subframe.
    Type: Application
    Filed: February 23, 2016
    Publication date: March 15, 2018
    Inventors: Koichi ADACHI, Jin Gon JUONG, Yuan ZHOU, Sumei SUN
  • Patent number: 9521685
    Abstract: The present invention is a circuit arrangement for a wireless cellular network. The circuit arrangement includes a determiner configured to determine a priority value of each packet of a plurality of packets based on at least a position of a video frame in a group of pictures and a type of the video frame, the video frame or a part thereof being contained in the packet, wherein the type of video frame comprises I frame data or P frame data; and wherein the determiner is further configured to set the priority value of a packet including I frame data lower than the priority value of at least one other packet including P frame data; and a controller configured to control scheduling of the packet based on the determined priority value for a communication device in a wireless cellular network. A method of determining a priority of packet scheduling is also disclosed.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: December 13, 2016
    Assignees: Agency for Science, Technology and Research, Huawei International PTE., Ltd.
    Inventors: Peng Hui Tan, Jinghong Zheng, Sumei Sun, Zhengguo Li, Kedi Wu, Yuejun Wei
  • Patent number: 9485714
    Abstract: The present invention is directed to a communication device of a wireless communication network, the communication device including a message generator configured to generate a beacon message having a traffic indication map (TIM) information element (IE), wherein the TIM IE includes a partial virtual bitmap field including at least one cluster; a determiner configured to determine for at least one cluster information indicating whether data is available in the communication device to be transmitted to a plurality of communication terminals of the wireless communication network; an encoder configured to determine an encoding mode for the information depending on the information and to encode the information based on the encoding mode; and a transmitter configured to broadcast the beacon message to the plurality of communication terminals corresponding to the at least one cluster.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: November 1, 2016
    Assignee: Agency for Science, Technology and Research
    Inventors: Yuan Zhou, Zhongding Lei, Sumei Sun, Ser Wah Oh
  • Patent number: 9237560
    Abstract: Methods and systems are proposed for transmitting data from a source (110) to a destination (130) via a relay station (120) having multiple antennae (122, 124). The relay station (120) receives from the source a message containing the data and a first cyclic prefix. It does this using each of its antennae (122, 124), so producing multiple respective received signals. In certain embodiments, the relay station (120) removes the first cyclic prefix from the received signals, replacing it with a new one. In other embodiments, the relay station (120) removes only a portion of the first cyclic prefix. In either case, the relay station (120) may apply space-time coding to generate second signals, which it transmits to the destination (130), which extracts the data. Methods are also proposed for estimating parameters of the channel, to enable the destination (130) to decode the data.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: January 12, 2016
    Assignee: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Lokesh Bheema Thiagarajan, Sumei Sun, Chau Yuen, Quee Seng Tony Quek
  • Publication number: 20150250001
    Abstract: The present invention is a circuit arrangement for a wireless cellular network. The circuit arrangement includes a determiner configured to determine a priority value of each packet of a plurality of packets based on at least a position of a video frame in a group of pictures and a type of the video frame, the video frame or a part thereof being contained in the packet, wherein the type of video frame comprises I frame data or P frame data; and wherein the determiner is further configured to set the priority value of a packet including I frame data lower than the priority value of at least one other packet including P frame data; and a controller configured to control scheduling of the packet based on the determined priority value for a communication device in a wireless cellular network. A method of determining a priority of packet scheduling is also disclosed.
    Type: Application
    Filed: September 21, 2012
    Publication date: September 3, 2015
    Applicants: Huawei International PTE., Ltd., Agency for Science, Technology and Research
    Inventors: Peng Hui Tan, Jinghong Zheng, Sumei Sun, Zhengguo Li, Kedi Wu, Yuejun Wei
  • Publication number: 20140334368
    Abstract: The present invention is directed to a communication device of a wireless communication network, the communication device including a message generator configured to generate a beacon message having a traffic indication map (TIM) information element (IE), wherein the TIM IE includes a partial virtual bitmap field including at least one cluster; a determiner configured to determine for at least one cluster information indicating whether data is available in the communication device to be transmitted to a plurality of communication terminals of the wireless communication network; an encoder configured to determine an encoding mode for the information depending on the information and to encode the information based on the encoding mode; and a transmitter configured to broadcast the beacon message to the plurality of communication terminals corresponding to the at least one cluster.
    Type: Application
    Filed: November 9, 2012
    Publication date: November 13, 2014
    Inventors: Yuan Zhou, Zhongding Lei, Sumei Sun, Ser Wah Oh
  • Publication number: 20140247770
    Abstract: Methods and systems are proposed for transmitting data from a source (110) to a destination (130) via a relay station (120) having multiple antennae (122, 124). The relay station (120) receives from the source a message containing the data and a first cyclic prefix. It does this using each of its antennae (122, 124), so producing multiple respective received signals. In certain embodiments, the relay station (120) removes the first cyclic prefix from the received signals, replacing it with a new one. In other embodiments, the relay station (120) removes only a portion of the first cyclic prefix. In either case, the relay station (120) may apply space-time coding to generate second signals, which it transmits to the destination (130), which extracts the data. Methods are also proposed for estimating parameters of the channel, to enable the destination (130) to decode the data.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 4, 2014
    Applicant: Agency for Science, Technology and Research
    Inventors: Lokesh Bheema Thiagarajan, Sumei Sun, Chau Yuen, Quee Seng Tony Quek
  • Patent number: 8819529
    Abstract: A method of communication comprising determining whether to use distributing coding between a source (S), relay (R) and destination (D), based on a predetermined transmission rate; if the determination is positive, determining a forward error correction scheme using distributed Alamouti space-time coding, wherein the scheme is determined based on the predetermined transmission rate, a channel signal-to-noise ratio (SNR) and a network topology; relaying coded data from the S to the D using the determined forward error correction.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: August 26, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Peng Hui Tan, Sumei Sun, Chin Keong Ho
  • Patent number: 8797936
    Abstract: Cooperative communication methods for a wireless communication network (100) and devices configured to perform such methods are disclosed herein. In a described embodiment, the network (100) includes a first communication device (102) and a second communication device (104), each of the communication devices (102,104) being associated with respective users and configured to communicate with a common base station (130). The cooperative communication method comprises the first communication device (102) transmitting a first message to the second communication device (104) for transmission to the base station (130) as a first routed message; and receiving a second message from the second communication device (104) for transmission to the base station (130) as a second routed message. In this way, the transmission is able to achieve diversity gains at the base station (130).
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: August 5, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Yonghong Zeng, Sumei Sun
  • Patent number: 8768245
    Abstract: Methods and systems are proposed for transmitting data from a source (110) to a destination (130) via a relay station (120) having multiple antennae (122, 124). The relay station (120) receives from the source a message containing the data and a first cyclic prefix. It does this using each of its antennae (122, 124), so producing multiple respective received signals. In certain embodiments, the relay station (120) removes the first cyclic prefix from the received signals, replacing it with a new one. In other embodiments, the relay station (120) removes only a portion of the first cyclic prefix. In either case, the relay station (120) may apply space-time coding to generate second signals, which it transmits to the destination (130), which extracts the data. Methods are also proposed for estimating parameters of the channel, to enable the destination (130) to decode the data.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: July 1, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Lokesh Bheema Thiagarajan, Sumei Sun, Chau Yuen, Quee Seng Tony Quek
  • Patent number: 8630580
    Abstract: An analog space-time relay method and apparatus for a wireless communication relay channel is disclosed herein. In a specific embodiment, the analog space-time relay channel (100) includes first and second relay antennas (122,124) arranged to relay an information signal transmitted from a source station (110) to a destination station (130).
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: January 14, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Sumei Sun, Chau Yuen, Quee Tony Seng Quek
  • Patent number: 8630310
    Abstract: The wireless transmission of layered signals, in a described embodiment, uses multiple relay nodes (304) to implement cooperative diversity. The method includes: (i) receiving layered signals from a source node (300), (ii) receiving, from a destination node (302), a relay allocation parameter to implement a cooperative relay strategy with one or more other relay nodes (304), and (iii) relaying the layered signals to the destination node (302) using the cooperative relay strategy.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: January 14, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Ubolthip Sethakaset, Quee Seng Tony Quek, Sumei Sun
  • Publication number: 20120320821
    Abstract: A method of relaying data for a wireless frequency division multiple access network is disclosed herein. In a specific embodiment, the method comprises the steps of receiving data carried by respective subcarriers (320), network coding the data of at least two of the subcarriers having minimized correlation (350), and mapping the network coded data to a plurality of resource blocks for relaying to a destination (360). A device for relaying data for a wireless frequency division multiple access net-work is also disclosed.
    Type: Application
    Filed: March 2, 2011
    Publication date: December 20, 2012
    Inventors: Sumei Sun, Chin Keong Ho, Peng Hui Tan
  • Publication number: 20120300644
    Abstract: A method (500) for estimating a carrier frequency offset in a communication system (100) is disclosed herein. In a described embodiment, the communications system (100) comprises a first communications device (120), a second communications device (122) and a relay (110).
    Type: Application
    Filed: January 26, 2011
    Publication date: November 29, 2012
    Inventors: Ho Wang Patrick Fung, Sumei Sun, Chin Keong Ho
  • Patent number: 8320491
    Abstract: According to one embodiment of the invention, a method for encoding a data matrix having at least a first component and a second component is provided wherein the value of the first component is determined, the number of bits to be used for encoding the second component is selected based on the value of the first component, the second component is encoded using the selected number of bits, and the first component is encoded.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: November 27, 2012
    Assignee: Agency for Science, Technology and Research
    Inventors: Chau Yuen, Sumei Sun
  • Publication number: 20120294202
    Abstract: A method of communication comprising: at time=t: a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; at time=t+1: the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node.
    Type: Application
    Filed: January 17, 2011
    Publication date: November 22, 2012
    Inventors: Jin Gon Joung, Sumei Sun