Patents by Inventor Patrick Lie Chin Cheong

Patrick Lie Chin Cheong 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: 9392578
    Abstract: A method selects mobile station candidates for use with virtual multiple-input multiple-output (“V-MIMO”) in a communication system. The communication system includes at least one base station and a plurality of mobile stations. At least one downlink metric is determined for a first mobile station. The at least one downlink metric is used to determine eligibility for uplink V-MIMO candidate list selection. Responsive to determining that the first mobile station is eligible for uplink V-MIMO candidate list selection, the first mobile station is paired with a second mobile station eligible for uplink V-MIMO candidate list selection.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: July 12, 2016
    Assignee: Apple Inc.
    Inventors: Shankar Venkatraman, Ashvin Chheda, Peter Michael Deane, Patrick Lie Chin Cheong
  • Publication number: 20160029277
    Abstract: A method and system for coordinated interference suppression in a communication system. The communication system implements at least a first radio access technology via a first base station and a second radio access technology via a second base station. The first and second radio access technologies differ from one another. Information relating to an interference signal received at the first base station via the first radio access technology is received at the second base station from a first device associated with the first base station. At a second device associated with the second base station, an interfering user equipment accessing the second base station via the second radio access technology is identified. The identification is based on the information received from the first device associated with the first base station. Interference caused by the identified interfering user equipment is suppressed by the second base station.
    Type: Application
    Filed: October 7, 2015
    Publication date: January 28, 2016
    Inventors: Xiao-Dong LI, Patrick LIE CHIN CHEONG, Carl CAO
  • Patent number: 9167434
    Abstract: A method and system for coordinated interference suppression in a communication system. The communication system implements at least a first radio access technology via a first base station and a second radio access technology via a second base station. The first and second radio access technologies differ from one another. Information relating to an interference signal received at the first base station via the first radio access technology is received at the second base station from a first device associated with the first base station, At a second device associated with the second base station, an interfering user equipment accessing the second base station via the second radio access technology is identified. The identification is based on the information received from the first device associated with the first base station. Interference caused by the identified interfering user equipment is suppressed by the second base station.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: October 20, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Xiao-Dong Li, Patrick Lie Chin Cheong, Carl Cao
  • Patent number: 9161335
    Abstract: A method selects mobile station candidates for use with virtual multiple-input multiple-output (“V-MIMO”) in a communication system. The communication system includes at least one base station and a plurality of mobile stations. At least one downlink metric is determined for a first mobile station. The at least one downlink metric is used to determine eligibility for uplink V-MIMO candidate list selection. Responsive to determining that the first mobile station is eligible for uplink V-MIMO candidate list selection, the first mobile station is paired with a second mobile station eligible for uplink V-MIMO candidate list selection.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: October 13, 2015
    Assignee: Apple Inc.
    Inventors: Shankar Venkatraman, Ashvin Chheda, Peter Michael Deane, Patrick Lie Chin Cheong
  • Patent number: 8982779
    Abstract: To provide space division multiple access in a wireless network, plural beams are transmitted within a cell segment. Different information sets are sent in the corresponding plural beams, where one or more of the information sets are detectable by a mobile station depending upon a location of the mobile station in the cell segment. An indication responsive to which of the different information sets is detected by the mobile station is received, and beam selection from among the plural beams is performed according to the received indication.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: March 17, 2015
    Assignee: BlackBerry Limited
    Inventors: Xiao-Dong Li, Peter M. Deane, Patrick Lie Chin Cheong, Neil McGowan, Ming Jia
  • Publication number: 20140044095
    Abstract: A method and system for coordinated interference suppression in a communication system. The communication system implements at least a first radio access technology via a first base station and a second radio access technology via a second base station. The first and second radio access technologies differ from one another. Information relating to an interference signal received at the first base station via the first radio access technology is received at the second base station from a first device associated with the first base station. At a second device associated with the second base station, an interfering user equipment accessing the second base station via the second radio access technology is identified. The identification is based on the information received from the first device associated with the first base station. Interference caused by the identified interfering user equipment is suppressed by the second base station.
    Type: Application
    Filed: August 8, 2012
    Publication date: February 13, 2014
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Xiao-Dong LI, Patrick LIE CHIN CHEONG, Carl CAO
  • Publication number: 20130188564
    Abstract: A scheduler performs per sub-band prioritization allocation of sub-bands to user terminals to generate a pre-allocation schedule. The prioritization is performed independently for each sub-band. The resulting pre-allocation schedule indicates the relative priorities of the user terminals for each sub-band taking into account the channel conditions and specific needs of the user terminals. Based on the pre-allocation schedule, the scheduler can more efficiently allocate the radio resources to the user terminals based on the channel conditions and the specific needs of the user terminals. The scheduling approach is suitable for parallel computing architectures. The use of a parallel computing architecture increases MIPS (million instructions per second) capacity and allows faster scheduling in order to meet stringent real-time constraints.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Derek YU, Patrick LIE CHIN CHEONG, Roger MAH
  • Patent number: 8457002
    Abstract: The present invention provides a method and apparatus for improving wireless communication network performance and efficiency, based on detecting the occurrence of grant loss in relation to the transmission of scheduling grants to mobile terminals over a downlink control channel. Grant loss detection is based on detecting erasure events corresponding to the transmitted scheduling grants, and the incidence of grant loss with respect to a given mobile terminal can be tracked and used to compensate the control value(s) used for link adaptation of the downlink control channel, with respect to that terminal. Additionally, or alternatively, when a given grant is determined to be lost, a new grant is sent and the HARQ redundancy version is reset for the newly scheduled transmission.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: June 4, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Hong Ren, Xixian Chen, Xiao-Dong Li, Patrick Lie Chin Cheong
  • Publication number: 20120207114
    Abstract: A method selects mobile station candidates for use with virtual multiple-input multiple-output (“V-MIMO”) in a communication system. The communication system includes at least one base station and a plurality of mobile stations. At least one downlink metric is determined for a first mobile station. The at least one downlink metric is used to determine eligibility for uplink V-MIMO candidate list selection. Responsive to determining that the first mobile station is eligible for uplink V-MIMO candidate list selection, the first mobile station is paired with a second mobile station eligible for uplink V-MIMO candidate list selection.
    Type: Application
    Filed: April 23, 2012
    Publication date: August 16, 2012
    Applicant: ROCKSTAR BIDCO, L.P.
    Inventors: Shankar VENKATRAMAN, Ashvin CHHEDA, Peter Michael DEANE, Patrick Lie Chin CHEONG
  • Publication number: 20120026985
    Abstract: The present invention provides a method and apparatus for improving wireless communication network performance and efficiency, based on detecting the occurrence of grant loss in relation to the transmission of scheduling grants to mobile terminals over a downlink control channel. Grant loss detection is based on detecting erasure events corresponding to the transmitted scheduling grants, and the incidence of grant loss with respect to a given mobile terminal can be tracked and used to compensate the control value(s) used for link adaptation of the downlink control channel, with respect to that terminal. Additionally, or alternatively, when a given grant is determined to be lost, a new grant is sent and the HARQ redundancy version is reset for the newly scheduled transmission.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Hong Ren, Xixian Chen, Xiao-Dong Li, Patrick Lie Chin Cheong
  • Publication number: 20110034206
    Abstract: A method selects mobile station candidates for use with virtual multiple-input multiple-output (“V-MIMO”) in a communication system. The communication system includes at least one base station and a plurality of mobile stations. At least one downlink metric is determined for a first mobile station. The at least one downlink metric is used to determine eligibility for uplink V-MIMO candidate list selection. Responsive to determining that the first mobile station is eligible for uplink V-MIMO candidate list selection, the first mobile station is paired with a second mobile station eligible for uplink V-MIMO candidate list selection.
    Type: Application
    Filed: April 28, 2009
    Publication date: February 10, 2011
    Applicant: NORTEL NETWORKS LIMITED
    Inventors: Shankar Venkatraman, Ashvin Chheda, Peter Michael Deane, Patrick Lie Chin Cheong
  • Publication number: 20100173639
    Abstract: To provide space division multiple access in a wireless network, plural beams are transmitted within a cell segment. Different information sets are sent in the corresponding plural beams, where one or more of the information sets are detectable by a mobile station depending upon a location of the mobile station in the cell segment. An indication responsive to which of the different information sets is detected by the mobile station is received, and beam selection from among the plural beams is performed according to the received indication.
    Type: Application
    Filed: July 16, 2008
    Publication date: July 8, 2010
    Inventors: Xiao-Dong Li, Peter M. Deane, Patrick Lie Chin Cheong, Neil McGowan, Jia Ming
  • Patent number: 7317706
    Abstract: A method for scheduling messages transmitted on a forward common channel of a CDMA system. The method includes determining the ratio between the slotted and unslotted messages transmitted over the forward common channel over a period of time. For each time slot S(i) of the forward common channel, s % time is allocated from the duration of the time slot to slotted messages and u % time is allocated from the duration of the time slot to unslotted messages. The s % time and u % time are determined based on the ratio between the slotted and unslotted messages transmitted over the forward common channel over a period of time.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: January 8, 2008
    Assignee: Nortel Networks Limited
    Inventors: Qi Hao, Xiao-Dong Li, Patrick Lie Chin Cheong, David Wilson
  • Patent number: 7310529
    Abstract: Data traffic over a plurality of data communications links of a wireless data communications system is controlled by identifying a poorly performing wireless link, and interrupting data communications over the poorly performing link. The data throughput of remaining links between the transceivers is thus increased due to reduced interference and increased available band-width, because the poorly performing link is no longer transmitting. Interruption of data communications over the poorly performing link may be accomplished by suspending or dropping transmission of a frame. If a frame is predicted to be certain to violate quality of service (QoS) requirements, the frame may be preemptively suspended or dropped. If multiple frames are dropped within a predetermined period, a communications session over the poorly performing link may be dropped. Data communications over the poorly performing link can be resumed following a selected delay period, which may have a random length.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: December 18, 2007
    Assignee: Nortel Networks Limited
    Inventors: Richard A. Lodge, Patrick Lie Chin Cheong
  • Patent number: 7212507
    Abstract: A method of controlling the performance of a radio link between a base transceiver station and a radio terminal for a wireless transmission system is provided. A radio network controller (RNC) monitors a directly observable L-2 parameter, and determines a without explicit L2-L1 signaling a threshold violation by the L-1 parameter for accordingly triggering a status change of the radio link. Namely, a L-2 radio resource management algorithm prompts the radio terminal and the RNC to perform a radio resource management action whenever the L-1 parameter violates a L-1 threshold. Such an action could be directly downgrading or upgrading the transmission rate on the radio link, or a radio link reconfiguration. The L-1 parameter may be the radio block error rate r, and the L-2 parameter may be the PDU retransmission rate R.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: May 1, 2007
    Assignee: Nortel Networks Limited
    Inventors: Jianyu Wang, Robin Hudson, Patrick Lie Chin Cheong, Frederic Ratovelomanana, Olivier Isnard
  • Patent number: 7092727
    Abstract: A system and method manages Radio Access Network (RAN) resources to service packet data transmissions at Service Quality Levels (SQL) commensurate with packet data network SQLs. A Packet Data Serving Node (PDSN) receives a data packet from a coupled packet data network. The data packet is directed toward a Mobile Station (MS) serviced by the RAN and includes a packet SQL indicator that indicates the level of service provided by the data packet network. A corresponding set of RAN resources is allocated to meet the packet SQL indicator. If the set of RAN resources cannot be allocated, the data packet SQL indicator is remarked accordingly. In another operation, the BSC receives a data packet from a MS serviced by the RAN. The data packet is intended for a coupled packet data network and includes a packet SQL indicator. The BSC first determines a set of allocated RAN resources that are servicing the transmission of the data packet to the packet data network.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: August 15, 2006
    Assignee: Nortel Networks Limited
    Inventors: Xiao-Dong Li, Patrick Lie Chin Cheong, Ashraf S. Mahmoud, Mazda Salmanlan
  • Publication number: 20050073989
    Abstract: A method of controlling the performance of a radio link between a base transceiver station and a radio terminal for a wireless transmission system is provided. A radio network controller (RNC) monitors a directly observable L-2 parameter, and determines a without explicit L2-L1 signaling a threshold violation by the L-1 parameter for accordingly triggering a status change of the radio link. Namely, a L-2 radio resource management algorithm prompts the radio terminal and the RNC to perform a radio resource management action whenever the L-1 parameter violates a L-1 threshold. Such an action could be directly downgrading or upgrading the transmission rate on the radio link, or a radio link reconfiguration. The L-1 parameter may be the radio block error rate r, and the L-2 parameter may be the PDU retransmission rate R.
    Type: Application
    Filed: October 6, 2003
    Publication date: April 7, 2005
    Inventors: Jianyu Wang, Robin Hudson, Patrick Lie Chin Cheong, Frederic Ratovelomanana, Olivier Isnard