Patents by Inventor Qinqing Zhang

Qinqing 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).

  • Publication number: 20080151900
    Abstract: In one embodiment, a relationship is determined between radio link protocol (RLP) sequence numbers in received RLP packets and real-time protocol (RTP) sequence numbers of RTP packets represented by the received RLP packets. A RTP sequence number associated with a compressed RTP packet is determined based on the determined relationship and at least one of the RLP sequence numbers of the received RLP packet or packets forming the compressed RTP packet. The compressed RTP packet does not include a RTP sequence number.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 26, 2008
    Inventors: Qi Bi, Qinqing Zhang
  • Publication number: 20080151901
    Abstract: In one embodiment, a relationship is determined between radio link protocol (RLP) sequence numbers in received RLP packets and real-time protocol (RTP) sequence numbers in RTP packets decompressed from the received RLP packets. An RTP sequence number associated with a compressed RTP packet is determined based on the determined relationship and at least one of the RLP sequence numbers of the received RLP packet or packets forming the compressed RTP packet. An RTP time stamp may be determined in a similar manner.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 26, 2008
    Inventors: Tomas S. Yang, Qinqing Zhang
  • Publication number: 20080070576
    Abstract: A method of handoff utilizing a combined signal quality measurement to trigger or initiate a handoff of a mobile station to a plurality of neighbor base stations, wherein the combined signal quality measurement corresponds to a summation of signal quality measurements associated with the plurality of neighbor base stations. The handoff is triggered when the combined signal quality measurement is greater than a handoff threshold. By using the combined signal quality measurement instead of a signal quality measurement of an individual neighbor base station, handoffs can be triggered earlier along a boundary shared by neighbor cells, thereby reducing interference associated with later triggered handoffs. When triggered, the mobile station is handed off to a plurality of neighbor base stations allowing the mobile station to establish simultaneous communication links with two or more neighbor base station.
    Type: Application
    Filed: September 20, 2006
    Publication date: March 20, 2008
    Inventors: Susan Wu Sanders, Carl Francis Weaver, Qinqing Zhang
  • Patent number: 7345999
    Abstract: The present invention provides techniques for the retransmission of packets of data. One device comprises a transmission unit adapted to retransmit all previously transmitted packets transmitted during a predetermined time interval, instead of just a single packet, when a received signal indicates that at least one previously transmitted packet contains corrupted data.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: March 18, 2008
    Assignee: Lucent Technologies Inc.
    Inventors: Hsuan-Jung Su, Qinqing Zhang
  • Patent number: 7336607
    Abstract: The present invention is a methodology for providing packet aggregation based on transmission window size to achieve improved transport efficiency. One embodiment of the invention includes the steps of receiving an indication of a transmission window size for packets to be transmitted from a first location to a second location where the transmission window size provided by a flow control message. The transmission window size is utilized to determine a bundling factor for transmission of packets from said first location to said second location, the bundling factor being a lesser of a maximum bundling factor and the transmission window size. A transmission window size threshold represents a boundary for a size of a transmission window when transmission of existing frames may be delayed. The frames are bundled according to the bundling factor if the transmission window size is greater than the transmission window size threshold.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: February 26, 2008
    Assignee: Lucent Technologies Inc.
    Inventors: Behrokh Samadi, Qinqing Zhang
  • Publication number: 20080013462
    Abstract: An overload or congestion condition on an access medium (24) of a communication network (22) is indicated by at least one condition that indicates an amount of access attempts on the access medium (24) corresponds to congestion or overload of a capacity of the access medium (24). Example conditions in disclosed embodiments include an occupancy level of the access medium, an average number of access probes associated with successful access attempts, a relationship between received power and interference, an emergency condition and network configuration or maintenance procedures. In a disclosed example, when congestion or overload occurs, at least one technique is implemented to reduce the congestion or overload for stabilizing the access medium. Disclosed example techniques for this include throttling the number of access attempt by reducing the number of users making access attempts or the frequency of user access attempts.
    Type: Application
    Filed: July 13, 2006
    Publication date: January 17, 2008
    Inventors: Sigen Ye, Qinqing Zhang
  • Publication number: 20080002602
    Abstract: In one embodiment, a reverse link overhead channel power gain for an access terminal is determined based on the service activity of the access terminal. In association therewith, or independent thereof, the reverse link overhead channel power gain may be dynamically adjusted based on the services activated and/or deactivated. The dynamic adjustment may also take into account the load on the system.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 3, 2008
    Inventors: Pi-Chun Chen, Qinqing Zhang
  • Publication number: 20070268959
    Abstract: At least a portion of a total spectrum bandwidth of a wireless system may be allocated to each of a plurality of users by assigning at least one unique spreading code to each of the plurality of users. At least two of the plurality of users may have different spectrum capabilities and may transmit simultaneously. Each of the assigned spreading codes may have a different code length. The number and/or the code length of the spreading codes assigned to each user may be indicative of a portion of the total spectrum bandwidth allocated to each user.
    Type: Application
    Filed: May 16, 2006
    Publication date: November 22, 2007
    Inventors: QI Bi, Yang Yang, Qinqing Zhang
  • Patent number: 7286560
    Abstract: The present invention is a method and apparatus to aggregate or bundle packets to optimize the resource utilization and improve the transport efficiency of packets which are transferred between various protocol layers in a communications network. One embodiment of the invention sets forth a method of aggregating packets of a first size to packets of a second size for transmission in a wireless communications network between, for example, a base station controller and base transmitting station. The method includes the steps of calculating a maximum bundling factor represented by (an IP packet MTU size at a first location minus protocol overhead) divided by an application layer packet size and determining a most efficient bundling factor in terms of packet fragments, where the most efficient bundling factor is determined by a largest packet per fragment ratio.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: October 23, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Behrokh Samadi, Qinqing Zhang
  • Publication number: 20070168482
    Abstract: In one embodiment, a transmission resource for transmitting data from a number of applications in a multiple carrier communication system is managed. In this embodiment, an aggregate transmission resource available to the number of applications is determined, and the determined aggregated transmission resource is distributed to each carrier based on a load on each carrier. In another embodiment a potential transmission resource for each application on each carrier is determined, and a carrier transmission resource for each carrier is determined based on the determined potential transmission resource for each application on the carrier. Data from at least one of the applications is assigned to at least one of the carriers based on the transmission resource distributed to or determined for the carrier, and the assigned data is transmitted on the carrier.
    Type: Application
    Filed: February 8, 2006
    Publication date: July 19, 2007
    Inventors: Pi-Chun Chen, Qinqing Zhang
  • Publication number: 20070165604
    Abstract: For use in packet-switched networks, a method is provided for using external information regarding the degree of misordering of packets, to make header compression more robust against such misordering.
    Type: Application
    Filed: January 13, 2006
    Publication date: July 19, 2007
    Inventors: Christopher Mooney, Qinqing Zhang
  • Publication number: 20070165643
    Abstract: A method is provided for controlling the misordering of packets in packet delivery in radio access networks (RANs) and other packet-switched networks. In one aspect, the method involves reading header information to determine the proper sequence of arriving packets, storing at least some packets that have arrived out of order, and forwarding the stored packets in a modified order that has no more than a specified degree of misordering.
    Type: Application
    Filed: January 13, 2006
    Publication date: July 19, 2007
    Inventors: Christopher Mooney, Qinqing Zhang
  • Publication number: 20070155389
    Abstract: A method is provided for controlling a communications session with an access terminal during a handoff between first and second radio network controllers. The method comprises receiving an indication that a call is being transferred from the first radio network controller to the second radio network controller. A compression technique to be used when sending data to the access terminal from the second radio network controller is established. The compression technique may be established by either receiving information from the first radio network controller or restarting the compression from an initial state.
    Type: Application
    Filed: December 31, 2005
    Publication date: July 5, 2007
    Inventor: Qinqing Zhang
  • Patent number: 7239610
    Abstract: The present invention is aimed at techniques for detecting the “partial loss” of an upper layer frame. One technique envisions a detection platform adapted to determine whether a packet is a final packet for a particular upper layer frame. A comparator platform then compares packets received free of transmission errors with variables indicative of whether all received packets in the particular upper layer frame have been received correctly when a final packet is detected. A transmission platform then sends a signal indicative of whether the packets received without transmission errors constitute the particular upper layer frame so that lost packets can be retransmitted quickly.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: July 3, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Hsuan-Jung Su, Qinqing Zhang
  • Publication number: 20070147331
    Abstract: In one embodiment of a method of managing transmission delay in a wireless communication system, a length of time over which a mobile station is permitted to re-transmit a packet or portion of a packet over a channel is controlled such that the length of time depends on at least one of a position of the mobile station, a temporal fading characteristic of the mobile station, and a radio frequency characteristic of the channel.
    Type: Application
    Filed: December 28, 2005
    Publication date: June 28, 2007
    Inventors: Qi Bi, Pi-Chun Chen, Qinqing Zhang
  • Publication number: 20070002795
    Abstract: The present invention may provide a method of communication that includes selecting at least one access channel for transmission of data based on a channel condition. The present invention may also provide a method of communication that includes receiving data over at least one access channel selected for transmission based on a channel condition.
    Type: Application
    Filed: June 29, 2005
    Publication date: January 4, 2007
    Inventors: Qi Bi, Hoo-Yin Khoe, David Rossetti, Sigen Ye, Qinqing Zhang
  • Publication number: 20060253235
    Abstract: The present invention provides a method of wireless communication with a device. The method includes accessing diagnostic information associated with the device and providing the diagnostic information over an air interface.
    Type: Application
    Filed: May 5, 2005
    Publication date: November 9, 2006
    Inventors: Qi Bi, Patrick Li, Mark Newbury, Qinqing Zhang
  • Publication number: 20060253770
    Abstract: The present invention provides a method of wireless communication using a mobile unit. The method includes establishing a wireless communication link in response to an indication provided using a graphical user interface associated with the mobile unit.
    Type: Application
    Filed: May 5, 2005
    Publication date: November 9, 2006
    Inventors: Qi Bi, Qinqing Zhang
  • Patent number: 7130657
    Abstract: Methods and systems are provided for improving frame selection in wireless communications networks. During decoding of a frame, a base station generates an error burst representation associated with error bursts and stores the representation within the frame, thus forming an enhanced frame. The base station then transfers the enhanced frame to a network controller. A frame selection unit (“FSU”) within the network controller thereafter applies frame selection to the enhanced frame. The error burst representation can be analyzed to determine the quality of the enhanced frame. A “combined” frame, generated by combining an “acceptable” portion of the enhanced frame and an acceptable portion of a copy of the enhanced frame, can then be generated to substantially eliminate errors. The present frame selection methods and systems enable superior quality frames to be passed on to higher layers in a network's communications protocol (hereafter collectively referred to as “network”).
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: October 31, 2006
    Assignee: Lucent Technologies Inc.
    Inventors: Ashwin Sampath, On-Ching Yue, Qinqing Zhang
  • Publication number: 20060067276
    Abstract: Outer loop power control for a traffic channel includes using at least one output from another channel to determine an appropriate control threshold such as a signal-to-noise ratio when selected channel conditions exist. One example traffic channel condition comprises having insufficient data transmission to provide a direct measurement of packet error rate. Another example traffic channel condition used to determine when to use the other channel output is a transmission mode on the traffic channel. An example output used for setting the control threshold is a chip energy to noise ratio of a pilot channel associated with the traffic channel.
    Type: Application
    Filed: September 30, 2004
    Publication date: March 30, 2006
    Inventors: Qi Bi, Dongzhe Cui, Qinqing Zhang