Patents by Inventor Danlu Zhang

Danlu Zhang 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: 9674800
    Abstract: A method for wireless communications is provided. The method includes applying independent power controls to two or more carriers from a set of high speed packet access signals. The method includes monitoring power across the two or more carriers to determine power levels for the set of high speed packet access signals. The method also includes automatically scaling at least one of the independent power controls in view of the determined power levels for the set of high speed packet access signals. The method also includes setting the minimum power offset of the data channel independently on each carrier.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: June 6, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Pavan Kumar Vitthaladevuni, Jilei Hou, Ozcan Ozturk, Arjun Bharadwaj, Ravi Agarwal, Sharad Deepak Sambhwani
  • Patent number: 9497773
    Abstract: One or more scheduling grants may be received from a Node B related to a plurality of uplink MIMO streams. A determination may be made as to a primary transport power and a primary transport block size for a primary stream. A secondary transmit power and a secondary transport block size for a secondary stream may also be determined. An enhanced relative grant channel from the Node B, as well as another E-RGC from a non-serving Node B may be received for each of the plurality of uplink MIMO streams.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: November 15, 2016
    Assignee: QUALOCOMM Incorporated
    Inventors: Danlu Zhang, Sharad Deepak Sambhwani, Arjun Bharadwaj, Ravi Agarwal, Sony J. Akkarakaran
  • Patent number: 9450644
    Abstract: A method of MIMO signal transmission on a cable is disclosed. The cable includes at least a first inner conductor, a second inner conductor, and an outer conductive shield. A first data signal is transmitted using the conductive shield and the first inner conductor. A second data signal is transmitted using at least the second inner conductor. The first and second data signals may be transmitted concurrently. For some embodiments, the second data signal may be transmitted using the first and second inner conductors. Thus, the second data signal may be a differential signal. For other embodiments, the first data signal may be transmitted using the conductive shield and the first inner conductor, and the second data signal may be transmitted using the conductive shield and the second inner conductor.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: September 20, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Guining Shi, William J. McFarland, Yin Huang, Gerardo Romo Luevano, Jae Min Shin, Kevin Khanh Dao
  • Patent number: 9379791
    Abstract: Multiple input multiple output (MIMO) communication systems and methods for chip to chip and intrachip communication are disclosed. In one aspect, MIMO techniques that have been applied to wireless communication systems are applied to interchip and intrachip communication systems. In particular, a transfer function is applied at the transmitter, and a reverse transfer function is applied at the receiver. The transfer function dynamically changes based on channel conditions to cancel or otherwise mitigate electromagnetic interference (EMI) and crosstalk conditions. In an exemplary aspect, a sum of power levels across the channels may have a maximum. To abide by such power level constraint, the transfer function may be optimized to reduce interference while remaining within the power level constraint.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: June 28, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: RaviKiran Gopalan, Danlu Zhang
  • Patent number: 9338665
    Abstract: A method of determining a distance estimate between a mobile device and a wireless transceiver communicating with the mobile device on at least one multi-carrier signal includes: receiving at least one multi-carrier signal; selecting at least one carrier signal from the at least one multi-carrier signal; measuring a signal characteristic of the at least one carrier signal from the at least one multi-carrier signal; and determining the distance estimate between the mobile device and the wireless transceiver based at least partially upon the signal characteristic.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: May 10, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Aziz Gholmieh, Jilei Hou, Arnold J. Gum
  • Patent number: 9312933
    Abstract: A mobile wireless device may dynamically alter a downlink MIMO function by switching it on and off, or switching between different downlink MIMO configurations, such as 2√óMIMO and 4√óMIMO. Still further, a mobile device having greater than two antennas may dynamically select a subset of the antennas to be used to receive a MIMO transmission, and further, enable a mobile device to request a subset of antennas at a base station to be used for the MIMO transmission. This dynamic control of the MIMO mode or configuration may be achieved by using implicit signaling, by way of an enlarged code word set in CQI feedback transmissions, or by using explicit signaling, by way of E-DPCCH orders. In this way, a MIMO-capable mobile device may dynamically be configured for downlink MIMO transmissions as the conditions demand, enabling MIMO to be switched off when its use might otherwise cause performance to suffer.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: April 12, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Sharad Deepak Sambhwani
  • Patent number: 9294235
    Abstract: In aspects of the present disclosure, a user equipment receives inter-NodeB multi-point transmissions, and a multipoint aggregation component detects a gap in the sequence numbers, delays transmitting a not acknowledged signal (NAK) by starting a NAK delay timer, and transmits, by a transceiver, NAK for the gap in sequence numbers in response to the NAK delay timer expiring and detecting that the gap has not been filled during the delaying. If the Medium Access Control (MAC) entity as the respective NodeB identifies itself to the Radio Link Control (RLC), out-of-order delivery (skew) can eventually be distinguished from genuine data loss before the NAK delay timer expires based upon tracking the highest sequence numbers received. Adaptive NAK delay timer can be performed by monitoring skew duration.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 22, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Weiyan Ge, Rohit Kapoor, Bibhu Prasad Mohanty
  • Publication number: 20160036501
    Abstract: Multiple input multiple output (MIMO) communication systems and methods for chip to chip and intrachip communication are disclosed. In one aspect, MIMO techniques that have been applied to wireless communication systems are applied to interchip and intrachip communication systems. In particular, a transfer function is applied at the transmitter, and a reverse transfer function is applied at the receiver. The transfer function dynamically changes based on channel conditions to cancel or otherwise mitigate electromagnetic interference (EMI) and crosstalk conditions. In an exemplary aspect, a sum of power levels across the channels may have a maximum. To abide by such power level constraint, the transfer function may be optimized to reduce interference while remaining within the power level constraint.
    Type: Application
    Filed: September 19, 2014
    Publication date: February 4, 2016
    Inventors: RaviKiran Gopalan, Danlu Zhang
  • Publication number: 20150270872
    Abstract: A method of MIMO signal transmission on a cable is disclosed. The cable includes at least a first inner conductor, a second inner conductor, and an outer conductive shield. A first data signal is transmitted using the conductive shield and the first inner conductor. A second data signal is transmitted using at least the second inner conductor. The first and second data signals may be transmitted concurrently. For some embodiments, the second data signal may be transmitted using the first and second inner conductors. Thus, the second data signal may be a differential signal. For other embodiments, the first data signal may be transmitted using the conductive shield and the first inner conductor, and the second data signal may be transmitted using the conductive shield and the second inner conductor.
    Type: Application
    Filed: September 11, 2013
    Publication date: September 24, 2015
    Inventors: Danlu Zhang, Guining Shi, William McFarland, Yin Huang, Gerardo Romo Luevano, Jae Min Shin, Kevin Khanh Dao
  • Patent number: 9137757
    Abstract: A wireless communication device includes: an antenna for receiving inbound signals on dual receive channels and transmitting outbound signals on dual transmit channels; a transceiver coupled to the antenna to receive the inbound signals from the antenna and convey the outbound signals; a power controller coupled to the transceiver to control power levels of the outbound signals so a maximum nominal power level of the outbound signals is a first power level; and a processor coupled to the transceiver and the antenna to cause the power controller to control the power levels of the outbound signals so if a power level of a received one of the inbound signals is below a threshold value, then the maximum nominal power level of the outbound signals is a second power level lower than the first power level, wherein the second power level is lower than the first power level.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: September 15, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Heechoon Lee, Sharad Deepak Sambhwani, Wesley A. Sampson, Harris S. Simon, Vijay K. Chellappa, Danlu Zhang
  • Patent number: 9125098
    Abstract: The present disclosure provides methods and apparatuses for improved Iub link congestion management based on a dynamic scaling of flow control request message transmission in multiflow wireless environments. For example, in an aspect, methods and apparatuses are provided for receiving, at a NodeB, a data request from one or more user equipment (UE), wherein each data request corresponds to a flow and the one or more UE is served by a plurality of NodeBs, generating a flow control request corresponding to each flow in response to each data request, and sending each flow control request to a radio network controller (RNC). Thereafter, a Node B may receive data in response to each flow control request, determine a congestion state based on a downlink delay from the RNC detected in the received data, and scale a subsequent one or more flow control requests based on the determined congestion state.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: September 1, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Weiyan Ge, Rohit Kapoor, Bibhu Prasad Mohanty, Sharad Deepak Sambhwani
  • Patent number: 9084261
    Abstract: Systems, methods, devices, and computer program products are described for discontinuous multi-carrier uplink management in a wireless communication system. Common timing parameters may be identified for use in relation to discontinuous uplink transmissions on each of a two or more wireless carriers concurrently transmitting from an access terminal. A first operational state is associated with a first wireless carrier, while a second, different state is associated with a second wireless carrier. The first carrier may be operated in the first operational state concurrently with the second carrier being operated in the second operational state, with each carrier operated in accordance with the common timing parameters.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: July 14, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Aziz Gholmieh, Danlu Zhang, Bibhu P. Mohanty, Arjun Bharadwaj, Sharad D. Sambhwani
  • Patent number: 9055604
    Abstract: One or more scheduling grants may be received from a Node B related to a plurality of uplink MIMO streams. A determination may be made as to a primary transport power and a primary transport block size for a primary stream. A secondary transmit power and a secondary transport block size for a secondary stream may also be determined.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: June 9, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Sharad Deepak Sambhwani, Arjun Bharadwaj, Ravi Agarwal, Sony J. Akkarakaran
  • Patent number: 9007926
    Abstract: Systems and methods to configure and schedule asymmetric carriers on an uplink between communication devices are described herein. An access node is provided to reserve a common-channel-free carrier for communication with an access terminal. The access node may reserve the carrier for communication with the access terminal based on path loss data between the access node and the access terminal. Further, an adaptive rise-over-thermal (RoT) target may be employed for communication over any carrier.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: April 14, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Jilei Hou, Danlu Zhang
  • Patent number: 9001750
    Abstract: Apparatus and methods that provide wireless communications, where a method for wireless communications includes receiving at a Node B a first set of bits indicating at least two frequency bands supported by a UE for HSDPA, the first set of bits further specifying a number of downlink adjacent carriers supported by the UE for each of the at least two frequency bands. The method also includes transmitting a first set of bits indicating support for a set of carriers for each band, the information comprising information related to a maximum channel bandwidth supported for that band; and transmitting a second set of bits indicating a configuration for the set of carriers under which multiple uplinks will be supported.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: April 7, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Aziz Gholmieh, Sharad Deepak Sambhwani, Heechoon Lee
  • Patent number: 9001777
    Abstract: Systems and methods for communicating over multiple carriers are described herein. A predetermined event triggers the generation of scheduling information for two or more of the carriers. The predetermined event may comprise expiration of a timer set for at least one of the two or more carriers, storing data in a buffer having a higher transmission priority than data previously stored in the buffer, or changing at least one of the two or more carriers from being served by a first cell to being served by a second cell.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: April 7, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Sharad Deepak Sambhwani, Aziz Gholmieh, Rohit Kapoor, Jilei Hou, Ozcan Ozturk, Arjun Bharadwaj
  • Patent number: 8989140
    Abstract: A method and apparatus for wireless communication may provide for mobility in a Multi-Point HSDPA network capable of downlink aggregation. Some aspects of the disclosure provide modified mobility events utilized for altering the Active Set for a UE. Here, the addition of a cell to the Active Set can coincide with making that cell a secondary serving cell. Further, the deletion of a secondary serving cell from the Active Set can coincide with switching off the Multi-Point HSDPA mode. Still further, a modified mobility event for an HSDPA serving cell change can be utilized to swap a primary serving cell and a secondary serving cell.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Sharad Deepak Sambhwani, Rohit Kapoor, Jilei Hou, Weiyan Ge
  • Patent number: 8989004
    Abstract: A method and apparatus for wireless communication may provide a multi-link PDCP sublayer in a radio network controller capable of allocating PDCP PDUs among a plurality of RLC entities for use in a multi-point HSDPA network. Some aspects of the disclosure address issues relating to out-of-order delivery of the PDCP PDUs to a UE, such as unnecessary retransmissions. That is, the disclosed multi-link PDCP may be capable of distinguishing between sequence number gaps that are caused by physical layer transmission failures and those caused merely by skew.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danlu Zhang, Rohit Kapoor, Bibhu Prasad Mohanty, Weiyan Ge, Jilei Hou
  • Patent number: 8989107
    Abstract: The present patent application discloses a method and apparatus for activating or de-activating a secondary carrier, comprising informing a serving radio network controller when a secondary carrier was activated or de-activated, receiving a confirmation from the serving radio network controller that non-serving NodeB cells have achieved synchronization, and scheduling a UE upon receiving confirmation. In another example, the present patent application discloses a method and apparatus for de-activating a secondary carrier, comprising controlling de-activation of the secondary carrier using high-speed shared control channel orders, receiving acknowledgement of said high-speed shared control channel orders, and informing a serving radio network controller when the secondary carrier was de-activated.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Sharad Deepak Sambhwani, Andrei Dragos Radulescu, Rohit Kapoor, Bibhu Prasad Mohanty, Mario Mark Scipione, Danlu Zhang, Aziz Gholmieh
  • Publication number: 20150065106
    Abstract: A method, an apparatus, and a computer program product are provided. The apparatus may be configured to link user equipment contexts associated with same physical device. A network entity may determine a link between a first context and a second context of a user equipment, and may combine procedures related to the first and the second contexts when the first context and the second context are linked. The first context and the second context may be associated with a common international mobile equipment identity of the UE and different international mobile subscriber identities. A wireless device may maintain a first wireless communications link corresponding to a first subscription and a second wireless communications link corresponding to a second subscription. The wireless device may refrain from performing a first radio resource procedure in relation to the first subscription after performing a similar radio resource procedure in relation to the second subscription.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Amer CATOVIC, Manoj M. Deshpande, Danlu Zhang