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).
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Patent number: 8817606Abstract: 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: GrantFiled: July 13, 2006Date of Patent: August 26, 2014Assignee: Alcatel LucentInventors: Sigen Ye, Qinqing Zhang
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Patent number: 8804486Abstract: System, methods, and networks are disclosed that allow base station systems of a wireless communication network to transmit outgoing traffic over a packet backhaul network to multiple routing elements on the MSC side of the network. A base station system described herein identifies a primary routing element and a backup routing element. The primary routing element is the device to which the base station system transmits outgoing traffic under normal operation, and the backup routing element is an alternate to the primary routing element. To transmit traffic over the packet backhaul network, the base station system monitors the availability of the primary routing element. If the primary routing element is available, then the base station system transmits outgoing traffic over the packet backhaul network to the primary routing element. If unavailable, then the base station system transmits outgoing traffic over the packet backhaul network to the backup routing element.Type: GrantFiled: March 5, 2007Date of Patent: August 12, 2014Assignee: Alcatel LucentInventors: Ina Z. Chen, Joseph Veltri, Qinqing Zhang
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Patent number: 8537741Abstract: 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: GrantFiled: January 13, 2006Date of Patent: September 17, 2013Assignee: Alcatel LucentInventors: Christopher Francis Mooney, Qinqing Zhang
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Patent number: 8477689Abstract: A communication device includes a transmitter portion, a receiver portion and a management portion. The transmitter portion transmits information into a channel. The receiver portion receives information from the channel. The management portion includes a request-to-send packet generating portion, a clear-to-send packet receiving portion, a threshold database, a comparator and a resolution packet generating portion. The threshold database stores a threshold value for the parameter of the channel and provides the threshold value to the comparator. The comparator compares the threshold value and the channel parameter information and generates an instruction signal based on the comparison. The resolution packet generating portion generates a resolution packet based on the instruction signal and provides the resolution packet to the transmitter portion.Type: GrantFiled: March 26, 2010Date of Patent: July 2, 2013Assignee: The John Hopkins UniversityInventors: Qinqing Zhang, Lotfi Benmohamed, Bharat T. Doshi
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Patent number: 8175075Abstract: In one embodiment, whether packet loss of link layer packets at a receiver has exceeded a lost threshold is detected. Feedback is sent to a transmitter indicating that a header compressor, for compressing higher layer packets at the transmitter, should send a less compressed header if the packet loss of the link layer packets has exceeded the lost threshold. The higher layer packets are at a higher layer than the link layer and are formed by the link layer packets.Type: GrantFiled: December 26, 2006Date of Patent: May 8, 2012Assignee: Alcatel LucentInventor: Qinqing Zhang
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Patent number: 8098613Abstract: 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: GrantFiled: December 28, 2005Date of Patent: January 17, 2012Assignee: Alcatel LucentInventors: Qi Bi, Pi-Chun Chen, Qinqing Zhang
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Patent number: 8081686Abstract: 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: GrantFiled: May 16, 2006Date of Patent: December 20, 2011Assignee: Alcatel LucentInventors: Qi Bi, Yang Yang, Qinqing Zhang
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Patent number: 8027328Abstract: 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: GrantFiled: December 26, 2006Date of Patent: September 27, 2011Assignee: Alcatel LucentInventors: Tomas S. Yang, Qinqing Zhang
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Patent number: 8000285Abstract: 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: GrantFiled: June 29, 2006Date of Patent: August 16, 2011Assignee: Alcatel LucentInventors: Pi-Chun Chen, Qinqing Zhang
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Patent number: 7899025Abstract: 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: GrantFiled: December 26, 2006Date of Patent: March 1, 2011Assignee: Alcatel-Lucent USA Inc.Inventors: Qi Bi, Qinqing Zhang
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Patent number: 7889692Abstract: Data communication includes an estimate of packet error rate that is useful, for example, when there is insufficient data transmission to provide a direct measurement of packet error rate. At least one pilot channel output provides a basis to determine an estimated packet error rate. One example includes using a pilot channel ratio of an energy-per-chip to a noise spectrum density. Another example includes using a pilot symbol error rate from the pilot channel as the basis for determining the traffic channel packet error rate.Type: GrantFiled: September 30, 2004Date of Patent: February 15, 2011Assignee: Alcatel-Lucent USA, Inc.Inventors: Qi Bi, Dongzhe Cui, Qinqing Zhang
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Publication number: 20100246549Abstract: A communication device and method are provided for communicating with a receiving device over a channel within a mobile ad-hoc network. The receiving device includes a clear-to-send (CTS) packet generating portion that can generate and a CTS packet based on a parameter of the channel and that can transmit the CTS packet over the channel. The communication device includes a transmitter portion, a receiver portion and a management portion. The transmitter portion can transmit information into the channel. The receiver portion can receive information from the channel. The management portion includes a request-to-send (RTS) packet generating portion, a CTS packet receiving portion, a threshold database, a comparator and an RES packet generating portion. The management portion is in communication with the transmitter portion and the receiver portion. The RTS packet generating portion can generate a RTS packet and can provide the RTS packet to the transmitter portion.Type: ApplicationFiled: March 26, 2010Publication date: September 30, 2010Inventors: Qinqing Zhang, Lotfi Benmohamed, Bharat T. Doshi
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Patent number: 7792048Abstract: 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: GrantFiled: September 30, 2004Date of Patent: September 7, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Qi Bi, Dongzhe Cui, Qinqing Zhang
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Patent number: 7782899Abstract: 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: GrantFiled: February 8, 2006Date of Patent: August 24, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Pi-Chun Chen, Qinqing Zhang
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Patent number: 7782862Abstract: 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: GrantFiled: January 13, 2006Date of Patent: August 24, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Christopher Francis Mooney, Qinqing Zhang
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Patent number: 7764624Abstract: The present invention provides techniques for preventing protocol stalling. A control platform is adapted to generate a predetermined time period, wherein the predetermined time period is reset when an acknowledgement signal is received. The control platform is further adapted to examine stored packets to detect new or negatively acknowledged packets. A transmission platform is adapted to transmit an earliest transmitted packet after the predetermined time period expires when no new or negatively acknowledged packets are detected.Type: GrantFiled: July 18, 2002Date of Patent: July 27, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Hsuan-Jung Su, Qinqing Zhang
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Patent number: 7603475Abstract: In the method of flow control, a flow control message, requesting more data, is sent from a first communication device based on an amount of data output by the first communication device and an available data storage capacity of the first communication device.Type: GrantFiled: March 31, 2003Date of Patent: October 13, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Tomas Yang, Qinqing Zhang
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Patent number: 7433335Abstract: 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: GrantFiled: June 29, 2005Date of Patent: October 7, 2008Assignee: Lucent Technologies Inc.Inventors: Qi Bi, Hoo-Yin Khoe, David Albert Rossetti, Sigen Ye, Qinqing Zhang
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Publication number: 20080219207Abstract: System, methods, and networks are disclosed that allow base station systems of a wireless communication network to transmit outgoing traffic over a packet backhaul network to multiple routing elements on the MSC side of the network. A base station system described herein identifies a primary routing element and a backup routing element. The primary routing element is the device to which the base station system transmits outgoing traffic under normal operation, and the backup routing element is an alternate to the primary routing element. To transmit traffic over the packet backhaul network, the base station system monitors the availability of the primary routing element. If the primary routing element is available, then the base station system transmits outgoing traffic over the packet backhaul network to the primary routing element. If unavailable, then the base station system transmits outgoing traffic over the packet backhaul network to the backup routing element.Type: ApplicationFiled: March 5, 2007Publication date: September 11, 2008Inventors: Ina Z. Chen, Joseph Veltri, Qinqing Zhang
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Publication number: 20080151901Abstract: 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: ApplicationFiled: December 26, 2006Publication date: June 26, 2008Inventors: Tomas S. Yang, Qinqing Zhang