Patents by Inventor Hujun Yin

Hujun Yin 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).

  • Virtual multicarrier design for orthogonal frequency division multiple access communications
    Patent number: 8295373
    Abstract: Embodiments of the present invention provide a virtual multicarrier design for orthogonal frequency division multiple access communications. Other embodiments may be described and claimed.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: October 23, 2012
    Assignee: Intel Corporation
    Inventors: Hujun Yin, Rongzhen Yang, Xiaoshu Qian, Yang-Seok Choi, Sassan Ahmadi, Kamran Etemad
  • WIRELESS COMMUNICATIONS DEVICE HAVING A VIRTUAL WIDEBAND CHANNEL
    Publication number: 20120243483
    Abstract: An embodiment of the present invention provides an apparatus comprising an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication device having a virtual wideband channel comprising a single Media Access Control (MAC) layer instance coupled to first and second transport channels and at least one physical layer configured to communicate via first and second physical channels having a defined bandwidth. The first and second physical channels are mapped to the first and second transport channels, respectively, and are aggregated in the single MAC layer instance to provide a virtual wideband channel for the wireless communication device.
    Type: Application
    Filed: September 8, 2011
    Publication date: September 27, 2012
    Inventors: Sassan Ahmadi, Muthaiah Venkatachalam, Hujun Yin
  • Dynamic interference avoidance with asynchronous HARQ
    Patent number: 8261151
    Abstract: In a wireless communications network, a wireless device may examine the received signal to determine the strength of the received signal, and also determine the level of interference and noise. If a retransmission is needed due to a message being incorrectly received, these factors may then be processed to estimate whether the probable cause of poor reception is interference from a neighboring network. If such interference is the likely cause, the retransmission may be changed to a different time and/or to different frequencies in a subsequent frame, so that the interference from the neighboring network is less likely to reoccur.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: September 4, 2012
    Assignee: Intel Corporation
    Inventors: Huaning Niu, Hujun Yin
  • WLAN having load balancing based on access point loading
    Patent number: 8249039
    Abstract: A network having distribution of access point loading includes access points to which mobile stations can associate themselves based upon access point beacon signal levels and loading levels for the various access points. A mobile station receives beacon signals from various access points and determines a signal strength for the received beacon signals. The mobile station also receives access point loading information from the access points. The mobile station associates with an access point based upon the access point beacon signal strengths and the access point loading information.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: August 21, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Zoran Kostic, Kin K. Leung, Hujun Yin
  • Bandwidth allocation base station and method for allocating uplink bandwidth using SDMA
    Patent number: 8243690
    Abstract: Embodiments of a base station and methods for allocating uplink bandwidth using SDMA are generally described herein. In some embodiments, uplink bandwidth request messages are received on a bandwidth request contention channel from one or more subscriber stations. The uplink bandwidth request messages are generated by the subscriber stations by modulating pilot subcarriers of a randomly selected disjoint pilot pattern with a randomly selected orthogonal sequence. The base station allocates uplink bandwidth to the subscriber stations when the uplink bandwidth request messages are successfully detected and decoded. The base station uses an SDMA technique to determine channel responses based on the orthogonal sequences to detect and decode the uplink bandwidth request messages.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: August 14, 2012
    Assignee: Intel Corporation
    Inventors: Qinghua Li, Ozgur Oyman, Wendy C. Wong, Hujun Yin, Xintian E Lin
  • Spatial reuse techniques with wireless network relays
    Patent number: 8243648
    Abstract: In various embodiments of the invention, a relay station in a wireless communications network may communicate with one or more subscriber stations at the same time and/or on the same frequency that the associated base station is communicating with another relay station in the same network. This contrasts with the conventional technique of devoting one time period or frequency exclusively to communications between the base station and the relay stations, and devoting another time period or frequency exclusively to communications between the relay stations and the subscriber stations.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: August 14, 2012
    Assignee: Intel Corporation
    Inventors: Qinghua Li, Xintian Eddie Lin, Hujun Yin, Jaroslaw J Sydir
  • HARQ timing control in wireless communication systems
    Patent number: 8239723
    Abstract: An apparatus and method for HARQ timing control in wireless communication systems is disclosed. The apparatus and method provides one unified algorithm to determine HARQ timing, with consideration of the downlink-to-uplink ratio, the presence of legacy zones, support of relay zones, and variable transmission time interval length. The disclosed algorithm guarantees sufficient processing time, at both the transmit and receive sides. Further, retransmissions occur in a periodic manner, simplifying the implementation.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: August 7, 2012
    Assignee: Intel Corporation
    Inventors: Yujian Zhang, Hujun Yin
  • Uplink power control in wireless networks
    Patent number: 8224373
    Abstract: Briefly, in accordance with one or more embodiments, one or more interference over thermal noise (IoT) values may be measured for one or more frequency partitions or a sounding area, or combinations thereof, and a difference between a current IoT value and a previous IoT value may be evaluated. If the difference is greater than or equal to a reset threshold, the current IoT value is broadcast to a mobile station to reset the IoT value. Otherwise an IoT differential value is broadcast to the mobile station to update the IoT with the IoT differential value. The mobile station may then perform open loop power control based on the IoT value for uplink broadcast.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: July 17, 2012
    Assignee: Intel Corporation
    Inventors: Rongzhen Yang, Hujun Yin
  • Techniques to determine transmitter power
    Patent number: 8219136
    Abstract: Techniques are described that can be used to determine a transmitter power level of a mobile station based on spectrum efficiency gain and loss. Spectrum efficiency gain is measured for a home sector base station. Spectrum efficiency loss is measured for base stations other than the home sector base station. In one example, a base station transmits information such as noise plus interference level to a mobile station and the mobile station determines the transmitter power level. In another example, the mobile station transmits information such as preamble signal strength and preamble total signal strength to the home sector base station and the home sector base station determines the transmitter power level and instructs the mobile station to apply the determined transmitter power level.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: July 10, 2012
    Assignee: Intel Corporation
    Inventors: Rongzhen Yang, Hujun Yin, Wei Guan
  • DOWNLINK AND UPLINK PATHLOSS ESTIMATION GAP ADJUSTMENT SCHEME FOR WIRELESS SYSTEMS
    Publication number: 20120157150
    Abstract: Briefly, in accordance with one or more embodiments, a pathloss gap between a downlink pathloss from a base station to a mobile station and an uplink pathloss from the mobile station to the base station is estimated. An initial offset value for uplink power control of the estimated pathloss gap is calculated based at least in part on said estimating. An offset value for an uplink data channel or an uplink control channel, or combinations thereof, is set based at least in part on the initial offset value. The pathloss gap for uplink power control is compensated using the set offset value.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 21, 2012
    Inventors: Rongzhen Yang, Hujun Yin, Jin Fu
  • Techniques for transmission of channel quality data in wireless systems
    Patent number: 8200165
    Abstract: An embodiment of the present invention provides an apparatus, including a transceiver adapted for use in a wireless network using a fast feedback channel design that incorporates a 2-two level adaptive fast feedback channel framework separating uplink (UL) fast feedback channels into primary and secondary UL fast feedback channels.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: June 12, 2012
    Inventors: Hongmei Sun, Changlong Xu, Qinghua Li, Yuan Zhu, Senjie Zhang, Yang Y. G. Gao, Jong-Kae J. K. Fwu, Hujun Yin
  • MIMO symbol decoder and method for decoding spatially multiplexed symbols using combined linear equalization and maximum likelihood decoding
    Patent number: 8194798
    Abstract: Embodiments of MIMO symbol decoders and methods for decoding spatially multiplexed symbols using combined linear equalization decoding and maximum likelihood decoding are generally described herein. In some embodiments, one group of symbols (y) received through two or more spatial channels is decoded using a linear equalization decoding technique and another group of symbols is decoded using a maximum likelihood decoding (MLD) technique to generate a soft-bit output. The symbols may be grouped for either linear equalization decoding or MLD based on channel orthogonality or signal-to-interference and noise ratios (SINRs).
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: June 5, 2012
    Assignee: Intel Corporation
    Inventors: Jiacheng Wang, Hujun Yin, Yang-Seok Choi, Liang Jiang
  • System aided PAPR reduction scheme based on TR algorithm
    Patent number: 8169959
    Abstract: A peak-to-average power ratio (PAPR) reduction method, known as system-aided PAPR reduction (SAPR), is disclosed. Based on a TR algorithm, the SAPR method avoids the drawbacks of conventional tone reservation implementations, and reduces PAPR significantly, in some embodiments. The SAPR method may be applied to next generation OFDMA-based wireless broadband technologies, to increase system throughput and cell coverage.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: May 1, 2012
    Assignee: Intel Corporation
    Inventors: Rongzhen Yang, Hujun Yin, Xiaoliang Luo, Liang Jiang, Longjing Zhu
  • METHODS FOR AN UPLINK POWER CONTROL MECHANISM
    Publication number: 20120087337
    Abstract: A method for an uplink power control mechanism is presented. In one embodiment, the method includes receiving an allocation information element (IE) in conjunction with a ranging process. The method includes processing the allocation information element to determine power control parameters including a first parameter about offset control and a second parameter about noise and interference level. The method also includes calculating the power value for each channel based at least in part on two or more power control parameters.
    Type: Application
    Filed: October 12, 2010
    Publication date: April 12, 2012
    Inventors: Rongzhen Yang, Hujun Yin
  • Techniques for feedback in cellular systems to mitigate interference in downlink
    Patent number: 8140068
    Abstract: An embodiment of the present invention provides a method, comprising broadcasting base station (BS) channel allocation methods and supported interference mitigation techniques in a whole cell by the base station and reporting classification information by mobile stations (MSs) within the cell to said base station about their preferred interference mitigation (IM) techniques.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: March 20, 2012
    Assignee: Intel Corporation
    Inventors: Clark Chen, Hujun Yin, Hongmei Sun, Hua Yang
  • TECHNIQUES FOR QUICK ACCESS CHANNEL INFORMATION LOADING IN WIRELESS NETWORKS
    Publication number: 20120063442
    Abstract: An embodiment of the present invention provides a method of quick access channel information loading in wireless networks, comprising mapping at least one quick access channel to one distributed resource unit of control tiles, said control tiles being spread across consecutive sub-carriers and consecutive OFDMA symbols, wherein each control tile and a predetermined number of sub carriers are used to send a bandwidth indicator and a predetermined number of sub carriers are used to send a bandwidth request message, and wherein there exist unique orthogonal sequences for the bandwidth indicator and each of the sequences are capable of being selected as a preamble sequence.
    Type: Application
    Filed: November 21, 2011
    Publication date: March 15, 2012
    Inventors: Yuan Zhu, Xiangying Yang, Qinghua Li, Hujun Yin, Honggang Li
  • Apparatus, systems and methods adapted for opportunistic forwarding of uplink short messages in wireless metropolitan area networks
    Patent number: 8134912
    Abstract: An embodiment of the present invention provides an apparatus, comprising a subscriber station (SS) operable to communicate with a base station (BS) and at least one additional subscriber station (SS) in a wireless metropolitan area network, wherein the at least one additional SS attempts to overhear a first message from the SS and piggy back a second message for the overheard message from the SS's uplink data to the BS with its uplink data.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: March 13, 2012
    Assignee: Intel Corporation
    Inventors: Qinghua Li, Ozgur Oyman, Xintian E. Lin, Hujun Yin
  • TECHNIQUES FOR TRANSMITTING CONTROL CHANNEL INFORMATION
    Publication number: 20120057703
    Abstract: Techniques for protecting information elements transmitted to mobile stations from intruders. The technique can involve applying a randomized mask over an information element and then providing a scrambled cyclic redundancy check (CRC) value. A seed for the randomized mask can be different from a seed for the scrambled CRC value.
    Type: Application
    Filed: March 22, 2011
    Publication date: March 8, 2012
    Inventors: Yi Hsuan, Hujun Yin
  • Adaptive MAC fragmentation and rate selection for 802.11 wireless networks
    Patent number: 8121103
    Abstract: A method for setting and adjusting MAC fragmentation threshold for IEEE 802.11 networks operating at different data rates is presented. The fragmentation threshold is adjusted based on throughput performance, delay constraints and hidden node influence.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: February 21, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Leonard Joseph Cimini, Jr., Zoran Kostic, Kin K Leung, Hujun Yin
  • UPLINK POWER HEADROOM CALCULATION AND REPORTING FOR OFDMA CARRIER AGGREGATION COMMUNICATION SYSTEM
    Publication number: 20110312366
    Abstract: A carrier aggregation power headroom reporting method is disclosed. User equipment selects from one of four possible definitions of a single parameter used to calculate the power headroom of the user equipment. The user equipment uses the parameter to calculate the power headroom for two different equations. The two results are transmitted to the enhanced base station.
    Type: Application
    Filed: September 23, 2010
    Publication date: December 22, 2011
    Inventors: RONGZHEN YANG, Xiangying Yang, Hujun Yin
  • Carrier for supporting textile material in a wet treatment machine
    Patent number: 5444997
    Abstract: Textile yarn package supporting carriers are disclosed for use in textile dyeing machines to enable the machine to be effectively operated at less than full capacity. Each carrier has a base with multiple upstanding package supporting posts equipped with interchangeable adapters to accommodate differing numbers of yarn packages up to the maximum capacity of the carrier. An upstanding wall on the base defines an enclosure for retaining treating liquid, and the wall has a selectively movable and removable panel for forming a liquid weir at a selectively variable level relative to the base to determine a maximum level of liquid which may be retained in the carrier enclosure.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: August 29, 1995
    Assignee: Gaston County Dyeing Machine Company
    Inventors: J. Keith Turner, Matthew A. Meeker, Thomas W. Van Scyoc