Patents by Inventor Sai Yiu Duncan Ho

Sai Yiu Duncan Ho 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: 8594031
    Abstract: Methods and apparatuses are provided that facilitate providing quality of service for similar priority logical channels at least in part by assigning dynamic priority levels to the logical channels to allow certain logical channels to be assigned resources before other logical channels. Dynamic priority levels can be assigned based at least in part on a total accumulated used bytes of a given logical channel scaled by a prioritized bit rate of the logical channel. Thus, logical channels with a lower number of total accumulated used bytes scaled by the prioritized bit rate can be assigned higher priority to ensure resources are assigned to the logical channels. Moreover, the dynamic priority levels can be normalized to align the dynamic priority levels within certain values so as not to interfere with other logical channels of different assigned priority.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: November 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Bao V. Nguyen, Srividhya Krishnamoorthy, Vanitha A. Kumar, Sai Yiu Duncan Ho
  • Patent number: 8594069
    Abstract: Techniques for performing in-order data delivery during handover in a wireless communication system are described. A user equipment (UE) may perform handover from a source base station to a target base station. The target base station may start a timer after a data path from a gateway to the UE has been switched from the source base station to the target base station. The target base station may receive forwarded packets for the UE from the source base station and may receive new packets for the UE from the gateway. The target base station may send the forwarded packets received prior to expiration of the timer to the UE before any new packets. The target base station may send the forwarded packets to the UE without waiting for the timer to expire and may send the new packets to the UE after the timer expires.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: November 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Francesco Grilli, Masato Kitazoe
  • Patent number: 8588138
    Abstract: Systems and methodologies are described that facilitate compressing headers for relay nodes. In particular, a plurality of internet protocol (IP) headers, tunneling protocol headers, and/or other routing headers in a packet can be compressed to facilitate efficient communications of packets between relay nodes and/or a donor access point. A donor or other upstream access point can be provided with a filter mask, bit stream, and filter mask identifier generated by a related relay node for packets having given static header data. Thus, the donor or other upstream access point can apply the filter mask to incoming packet headers, and where a resulting bit stream matches the received bit stream, can replace at least a portion of the packet headers with the filter mask identifier. The relay node can subsequently decompress the packet headers based on the filter mask identifier. Similar functionality can be used for compressing uplink communications.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: November 19, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Fatih Ulupinar, Parag Arun Agashe, Rajat Prakash
  • Publication number: 20130297810
    Abstract: Techniques are provided for efficiently reestablishing connection between peer-to-peer devices. For example, there is provided a method for peer-to-peer (P2P) connection reestablishment by a mobile device. The method may involve caching at least one of a Radio Resource Control (RRC) context and a session management (SM) context for a previous P2P session with a peer mobile device. The method may further involve establishing a connection with the peer mobile device based at least in part on at least one connection context identifier (CC ID) associated with the previous P2P session. The method may further involve reestablishing a previous session state based on the at least one of the RRC context and the SM context.
    Type: Application
    Filed: May 7, 2012
    Publication date: November 7, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Sai Yiu Duncan Ho, Gavin Bernard Horn, Miguel Griot
  • Publication number: 20130294337
    Abstract: Systems and methodologies are described that facilitate utilizing timers in conjunction with transmitting buffer status reports (BSR). A prohibit timer can be utilized to determine when BSRs can be transmitted to an eNB. The prohibit timer can be initialized or restarted upon transmitting a BSR to an eNB. A BSR retransmit timer can be used to determine when to retransmit a BSR. The BSR retransmit timer can be initialized upon transmitting a BSR to an eNB and restarted each time an uplink resource allocation is received from the eNB. Once the timer expires, if an uplink transmission buffer contains data (e.g., size>0), the BSR can be retransmitted to the eNB. Control data feedback can additionally be used to determine when to retransmit the BSR. In addition, in either case, the timer duration values can be provided by the eNB.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Inventors: Aleksandar Damnjanovic, Sai Yiu Duncan Ho
  • Patent number: 8565205
    Abstract: Uplink transmission power adjustment is provided by a mobile device receiving an uplink transmission grant from a serving base station. The mobile device determines a maximum power reduction for uplink transmissions and a SAR-related power reduction. The mobile device compares these values and adjusts transmission power according to the SAR-related power reduction in response to the SAR-related power reduction exceeding the maximum power reduction. A power headroom report is generated when the determined SAR-related power reduction exceeds a previous SAR-related power reduction. This power headroom report is transmitted from the mobile device to the serving base station under various conditions.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: October 22, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Valentin Alexandru Gheorghiu, Peter Gaal
  • Publication number: 20130254519
    Abstract: A configuration device is disclosed for configuring a network device in a communication network. The configuration device initiates pairing operations with the network device via a short-range communication connection. The configuration device determines whether the network device is in a registered state or an unregistered state. If the configuration device determines that the network device is in the unregistered state, the configuration device establishes a secure short-range communication channel between the configuration device and the network device. The configuration device transmits a network key to the network device via the secure short-range communication channel for configuring the network device to communicatively connect to the communication network. If the configuration device determines that the network device is in the registered state, the configuration device determines whether to unregister the network device.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 26, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Olivier Jean Benoit, Anand Palanigounder, Sai Yiu Duncan Ho, Aram Perez
  • Patent number: 8526374
    Abstract: Systems and methodologies are described that facilitate selecting an uplink carrier for random access within a wireless environment having multiple carriers. Selection of an uplink carrier for random access can be randomly selected from a set of available uplink carriers. Additionally, the uplink carrier for random access can be selected based upon which uplink carrier is paired with an anchor carrier. Further, the uplink carrier for random access can be identified based upon a bandwidth related to the user equipment (UE). Reference signals can also be employed in order to identify an uplink carrier to perform random access.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: September 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jelena M. Damnjanovic, Juan Montojo, Peter Gaal, Wanshi Chen, Sai Yiu Duncan Ho
  • Patent number: 8526440
    Abstract: Systems and methodologies are described that facilitate formation and/or dispatch of radio link control (RLC) protocol status reports to a base station. The system can include components that quantify an absence of protocol data units, ascertain whether a number of absent protocol data units exceeds the size of a transmission side grant, insert a sequence number associated with a first absent protocol data unit into an acknowledgement sequence number field associated with a partial status report, incorporates the sequence number associated with the first absent protocol data unit in the partial status report, includes sequence numbers of subsequent absent protocol data units into the partial status report without exceeding the transmission side grant, and sends the partial status report to the base station.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: September 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Ashwini Raina, Gang A. Xiao, Shailesh Maheshwari, Vanitha A. Kumar
  • Patent number: 8514721
    Abstract: Methods, systems, apparatus and computer program products are provided to improve the reliability of data reception. In one provided embodiment, a communication signal is parsed by a communication device to identify repeat request identifiers. The device determines an inter-arrival time of two instances of the same identifier and processes the communication signal based on a comparison between the inter-arrival time and a predetermined time. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Tao Luo, Durga Prasad Malladi, Juan Montojo, Nathan Edward Tenny, Sai Yiu Duncan Ho
  • Patent number: 8509180
    Abstract: An efficient use of downlink (DL) air-interface bandwidth during handoff of user equipment from a source cell to a target is provided. In conjunction with a handoff message to ensure receipt, expedited status exchanges are provided so that initial communications do not require a subsequent retransmission of duplicate data. A method for transmitting a dedicated Random Access Channel (RACH) preamble and cell information, receiving a RACH from the user equipment to start communication, and transmitting a handover message and a radio link control (RLC) status message or an UL grant in response to receiving the RACH is provided. Also, a method for receiving a handover message and target cell information from a source cell to start handover negotiations, initiating communication with target cell using the target cell information, receiving a handover message and (RLC) status message, and using the received information to approximate status reporting is provided.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: August 13, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Shailesh Maheshwari, Sai Yiu Duncan Ho, Peter A. Barany
  • Patent number: 8477719
    Abstract: Systems and methods that manage effects of discarded SDUs during handover. Aspects of the subject innovation maintain order for arrival of PDCP SDUs when a UE encounters a lost PDCP, which has resulted from a dropped SDU at the source eNB—before assignment of an associated PDCP SN. By initially assigning all SDUs corresponding PDCP SNs, a PDCP SN gap or hole can then be encountered upon dropping of a PDCP SDU. To manage PDCP SN gaps or holes thus generated, an internal time out can be designated to terminate an associated UE's delay for such SN hole(s) via a time out. Other aspects enable the source eNB to send a PDCP Status Message to the UE (via the target eNB) to abort the SN gaps or holes resulting from a dropped PDCP SN.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: July 2, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Sai Yiu Duncan Ho
  • Patent number: 8451795
    Abstract: An apparatus, method, processor(s), and computer program product avoids user data loss by network-controlled, user equipment assisted handover in a wireless data packet communication system. A wireless receiver receives radio link control (RLC) packet data units (PDUs) from user equipment (UE) being served by a source node. A wireless transmitter commands the UE to handover. A network communication interface transmits RLC Uplink (UL) context from the source node to the target node, and transmits RLC Downlink (DL) initialization message and buffered in-transit DL RLC PDUs from the source node to the target node.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: May 28, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Arnaud Meylan, Peter Anthony Barany, Francesco Grilli, Nathan Edward Tenny, Rashid Ahmed Akbar Attar
  • Patent number: 8437306
    Abstract: Techniques for sending data during handover with Layer 2 tunneling are described. In one design, a user equipment (UE) sends first Layer 2 packets to a source base station prior to handover to a target base station. The UE sends at least one second Layer 2 packet to the target base station, which identifies the second Layer 2 packet(s) as being intended for the source base station and thus forwards the second Layer 2 packet(s) to the source base station via a Layer 2 tunnel. The UE sends third Layer 2 packets to the target base station after the handover. The target base station processes the third Layer 2 packets to obtain IP packets and sends the IP packets to a serving gateway after a trigger condition, which may be defined to achieve in-order delivery of IP packets from the source and target base stations to the serving gateway.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: May 7, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Rashid Ahmed Akbar Attar, Arnaud Meylan, Sai Yiu Duncan Ho, Francesco Grilli, Nathan Edward Tenny, Peter Anthony Barany
  • Patent number: 8422480
    Abstract: A wireless network avoids delays in receiving status reports by having transmitters make sure that any outstanding Hybrid Automatic Repeat-reQuest (HARQ) processes in progress are all finished before sending the polling request. Thus, the receiver can respond to any polling request of the transmitter immediately without delay. Since the transmitter already ensures all HARQ processes are done, the receiver's status report will accurately reflect the latest information. The transmitter may send a poll anytime regardless of the HARQ processes if the most up-to-date polling is determined to be not as important (e.g., when the transmitter is trying to advance its transmitter window, in which case the exact Status info is not critical). The receiver may then react immediate upon receiving the poll. Thereby, detecting the loss of any piece of data within a data burst is expedited.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: April 16, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Sai Yiu Duncan Ho
  • Publication number: 20130064225
    Abstract: Systems and methodologies are provided that facilitate security activation for wireless communications. In an aspect, a method for wireless communication is provided which includes determining a first security key for communicating with a source access point and receiving, from the source access point, a handover command that includes an indication of whether to apply a second security key upon handover. The method also includes handing over communication from the source access point to a target access point, where the second security key is applied for communicating with the target access point upon the handover when the handover command indicates to apply the second security key.
    Type: Application
    Filed: November 12, 2012
    Publication date: March 14, 2013
    Inventors: Masato Kitazoe, Sai Yiu Duncan Ho, Francesco Grilli, Nathan Edward Tenny
  • Patent number: 8396083
    Abstract: A transmission entity (e.g., user equipment (UE)) is expected to reduce the segmentation of Radio Link Control (RLC) Service Data Units (SDUs) while also minimizing padding. Signaling or provisioning of a constraint value such as a maximum padding amount or minimum segmentation size is employed in a determinative way in the UE to balance these objectives. A receiving entity (e.g., evolved base node (eNB)) benefits from being able to signal these parameters, whose application to RLC instances can discriminate between data and signaling radio bearers. Compliance can also be voluntary, such as the network entity employing at least a portion of the same approach on the downlink.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: March 12, 2013
    Assignee: Qualcomm Incorporated
    Inventors: Shailesh Maheshwari, Sai Yiu Duncan Ho
  • Patent number: 8363611
    Abstract: Certain aspects of the present disclosure relate to a technique for releasing semi-persistent scheduling resources and for immediate entering an energy saving mode of operation at a user terminal.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: January 29, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Wanshi Chen, Juan Montojo
  • Patent number: 8339944
    Abstract: Systems and methodologies are described that facilitate packet discard restriction in a wireless communication system. As described herein, a discard prohibit counter and/or other similar mechanism can be employed to limit the number of consecutive packets that are discarded by a transmitter, even in the event that the delay bounds of those packets have been exceeded. A discard prohibit counter as described herein can be updated upon a packet transmission and reset upon a packet discard to ensure that an acceptable number of packets are transmitted before a packet can be discarded. An acceptable number of packets can be selected based on device specifications, requirements of a data packet flow and/or traffic associated with the flow, or other suitable factors, and can be constant or adaptable to changes in network conditions. As further described herein, multiple counters can be separately maintained and utilized for a plurality of corresponding packet flows.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: December 25, 2012
    Assignee: Qualcomm Incorporated
    Inventor: Sai Yiu Duncan Ho
  • Patent number: 8331949
    Abstract: Improved serving sector selection mechanisms are provided which convey sector load information to a wireless communicator. The wireless communicator can use carrier-to-interference (C/I) ratio measurements and sector load information for each of its Active Set (AS) sectors (or all sectors in its Active Set (AS)) to determine the best serving sector.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: December 11, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Gaal, Sai Yiu Duncan Ho