Patents by Inventor Li (Erran) Li

Li (Erran) Li 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: 9866301
    Abstract: In certain embodiments, a macrocell base station (BS), such as an LSAS BS, estimates its backhaul channels with a small-cell BS (e.g., a relay or repeater) by averaging multiple instances of a received pilot signal repeatedly transmitted by the small-cell BS. Since the macrocell and small-cell BSs are stationary, averaging the received pilot signal transmissions over time results in the zero-temporal-mean time-dependent component of each backhaul channel as well as zero-temporal-mean noise and interference signals from other wireless nodes to substantially cancel out, enabling the macrocell BS to relatively infrequently estimate a relatively time-invariant, dominant component for each backhaul channel. The macrocell BS uses the estimated dominant components to generate user-data-based downlink transmissions to the small-cell BS. In this way, the processing to estimate channel state information (CSI) data for the backhaul channels is greatly reduced compared to conventional techniques.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: January 9, 2018
    Assignee: Alcatel Lucent
    Inventors: Li Erran Li, Holger Claussen
  • Publication number: 20160285534
    Abstract: In certain embodiments, a frequency-division duplexing (FDD) communication system has (i) a multiple in, multiple-out (MIMO) node with multiple MIMO-node antennas and (ii) a second node (e.g., a relay or a repeater) with at least one second-node antenna. The MIMO node transmits downlink (DL) signals to the second node over multiple DL channels in a DL frequency band (FB), and the second node transmits uplink (UL) signals to the MIMO node over multiple UL channels in a UL FB different from the DL FB. The MIMO node receives pilot signals from the second node in the UL and DL FBs and generates UL and DL FB channel state information (CSI) based on the received pilot signals. The MIMO node decodes UL data signals from the second node based on the UL FB CSI and generating DL data signals to the second node based on the DL FB CSI.
    Type: Application
    Filed: March 27, 2015
    Publication date: September 29, 2016
    Inventors: Li Erran Li, Michael G. Zierdt
  • Publication number: 20160285533
    Abstract: In certain embodiments, a macrocell base station (BS), such as an LSAS BS, estimates its backhaul channels with a small-cell BS (e.g., a relay or repeater) by averaging multiple instances of a received pilot signal repeatedly transmitted by the small-cell BS. Since the macrocell and small-cell BSs are stationary, averaging the received pilot signal transmissions over time results in the zero-temporal-mean time-dependent component of each backhaul channel as well as zero-temporal-mean noise and interference signals from other wireless nodes to substantially cancel out, enabling the macrocell BS to relatively infrequently estimate a relatively time-invariant, dominant component for each backhaul channel. The macrocell BS uses the estimated dominant components to generate user-data-based downlink transmissions to the small-cell BS. In this way, the processing to estimate channel state information (CSI) data for the backhaul channels is greatly reduced compared to conventional techniques.
    Type: Application
    Filed: March 27, 2015
    Publication date: September 29, 2016
    Inventors: Li Erran Li, Holger Claussen
  • Publication number: 20150312771
    Abstract: In one example embodiment, a device is configured to determine whether to install a small cell base station at a target location. The device includes a processor configured to determine a transmission record associated with communication between at least one macro cell base station and a plurality of user equipment (UEs), and determine whether to install the small cell base station at the target location based on the transmission record and a connectivity state of each of the plurality of UEs.
    Type: Application
    Filed: April 25, 2014
    Publication date: October 29, 2015
    Inventor: Li Erran LI
  • Patent number: 9124475
    Abstract: Embodiments of the claimed subject matter provide methods and apparatuses for interference cancellation. One embodiment of a method includes estimating, for an antenna in an antenna array including a plurality of antennas, interference parameters using analog signals received at the antenna on each of a plurality of subcarriers. Each interference parameter is associated with one of a plurality of symbols transmitted to one of a plurality of users on one of the plurality of subcarriers. This embodiment also includes canceling interference from analog signals received by the antenna on the plurality of subcarriers using the estimated interference parameters.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: September 1, 2015
    Assignee: Alcatel Lucent
    Inventors: Li Erran Li, Thomas Marzetta
  • Patent number: 8767691
    Abstract: Embodiments of the claimed subject matter provide a method and apparatus for scheduling transmissions for an antenna array. One embodiment of the method includes scheduling a subset of a plurality of packets for concurrent transmission over an air interface to a corresponding subset of a plurality of wireless-enabled terminals. The subset is selected based on information indicating locations of the subset of the plurality of wireless-enabled terminals. This embodiment of the method also includes concurrently transmitting the subset of the plurality of packets using a plurality of antennas.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: July 1, 2014
    Assignee: Alcatel Lucent
    Inventors: Li Erran Li, Thomas Marzetta
  • Patent number: 8619779
    Abstract: Various embodiments relate to a Cloud Data Center, a system comprising the Cloud Data Center, and a related method. The Cloud Data Center may include a logical customer edge router to send packets between addresses in a private enterprise network and addresses in a logical network within a cloud network. The logical network may have resources, known as virtual machines, allocated to the private enterprise network and may share a common IP address space with the private enterprise network. A directory at the Cloud Data Center may correlate the enterprise IP addresses of virtual machines with a cloud IP address and a location IP address within the logical network. The Cloud Data Center may double encapsulate packets with two specified headers, a cloudIP and locIP header, when sending a packet to a destination in the logical network.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: December 31, 2013
    Assignee: Alcatel Lucent
    Inventors: Li Erran Li, Thomas Woo
  • Publication number: 20130262656
    Abstract: A method and system for identifying causes of performance metric changes in a network by selecting, from a pool of network event counters, a plurality of candidate counters relevant to a performance metric; grouping the candidate counters into clusters of similar counters; selecting, from each cluster, one or more representative counters; and fitting the selected representative counters to a model of the performance metric to determine thereby a set of representative counters most relevant to the performance metric.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 3, 2013
    Inventors: Jin Cao, Li Erran Li, Tian Bu, Susan Wu Sanders
  • Patent number: 8532108
    Abstract: Various embodiments relate to a Cloud Data Center, a system comprising the Cloud Data Center, and a related method. The Cloud Data Center may include a logical customer edge router to send packets between addresses in a private enterprise network and addresses in a logical network within a cloud network using Layer 2 protocol and MAC addressing. The logical network may have resources, known as virtual machines, allocated to the private enterprise network and may share a common IP address space with the private enterprise network. A directory at the Cloud Data Center may correlate the enterprise IP addresses of virtual machines with a MAC address, cloud IP address, and a location IP address within the logical network. The Cloud Data Center may double encapsulate packets with MAC, cloudIP, and locIP headers, when sending a packet to a destination in the logical network.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: September 10, 2013
    Assignee: Alcatel Lucent
    Inventors: Li Erran Li, Thomas Woo
  • Publication number: 20130151429
    Abstract: According to an embodiment, a computing system includes at least one computing device including a processor configured to use a logistic regression model to provide an indication of a relationship between a user's position within an enterprise and how the user interacts with other users of an enterprise social network.
    Type: Application
    Filed: November 29, 2012
    Publication date: June 13, 2013
    Inventors: Jin CAO, Li Erran LI, Hongyu GAO, Brian D. FRIEDMAN
  • Publication number: 20130089009
    Abstract: Embodiments of the claimed subject matter provide methods and apparatuses for interference cancellation. One embodiment of a method includes estimating, for an antenna in an antenna array including a plurality of antennas, interference parameters using analog signals received at the antenna on each of a plurality of subcarriers. Each interference parameter is associated with one of a plurality of symbols transmitted to one of a plurality of users on one of the plurality of subcarriers. This embodiment also includes canceling interference from analog signals received by the antenna on the plurality of subcarriers using the estimated interference parameters.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 11, 2013
    Inventors: Li Erran Li, Thomas Marzetta
  • Publication number: 20130070741
    Abstract: Embodiments of the claimed subject matter provide a method and apparatus for scheduling transmissions for an antenna array. One embodiment of the method includes scheduling a subset of a plurality of packets for concurrent transmission over an air interface to a corresponding subset of a plurality of wireless-enabled terminals. The subset is selected based on information indicating locations of the subset of the plurality of wireless-enabled terminals. This embodiment of the method also includes concurrently transmitting the subset of the plurality of packets using a plurality of antennas.
    Type: Application
    Filed: September 19, 2011
    Publication date: March 21, 2013
    Inventors: Li Erran Li, Thomas Marzetta
  • Patent number: 8081567
    Abstract: A system and method for network based detection of wireless data subscribers using network address translation devices is provided. The method includes identifying a minimum number of devices showing the same internet protocol address. Packet identification sequences may include port numbers or internet protocol identification numbers. The method continues with grouping these applications by their packet identification sequences and applying detection logic where detection logic yields a conclusion that there are multiple host computers when a set of applications appears in a plurality of packet identification sequences. This method is particularly useful when internet protocol addresses are dynamic, as opposed to static. This method overcomes previous embodiments known in the art by being able to account for and work with live traffic, which enables real time detection.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: December 20, 2011
    Assignee: Alcatel Lucent
    Inventors: Li (Erran) Li, Tian Bu, Scott C. Miller, Aiyou Chen
  • Publication number: 20110090941
    Abstract: To address the need for new techniques that are able to address overlapping channel collisions various embodiments are described. They are used to introduce the concept of retransmission-permutation, in which a bit-to-subcarrier assignment is permuted (1301) during packet retransmission (1302), thus departing from the well-known, simply-repeat paradigm. Various embodiments are straightforward to implement and able to exploit collision-free subcarriers to decode packets despite successive collisions in overlapping channels.
    Type: Application
    Filed: June 30, 2010
    Publication date: April 21, 2011
    Applicant: Alcatel-Lucent USA Inc.
    Inventor: Li Erran Li
  • Publication number: 20110075667
    Abstract: Various embodiments relate to a Cloud Data Center, a system comprising the Cloud Data Center, and a related method. The Cloud Data Center may include a logical customer edge router to send packets between addresses in a private enterprise network and addresses in a logical network within a cloud network using Layer 2 protocol and MAC addressing. The logical network may have resources, known as virtual machines, allocated to the private enterprise network and may share a common IP address space with the private enterprise network. A directory at the Cloud Data Center may correlate the enterprise IP addresses of virtual machines with a MAC address, cloud IP address, and a location IP address within the logical network. The Cloud Data Center may double encapsulate packets with MAC, cloudIP, and locIP headers, when sending a packet to a destination in the logical network.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Li Erran Li, Thomas Woo
  • Publication number: 20110078303
    Abstract: Various exemplary embodiments relate to a workload distribution system for an enterprise network extended in to a cloud network and a related method. The enterprise network may include a series of servers in a private enterprise network and a scalable series of servers in a cloud network. The enterprise network may employ one or more load balancers in both a private enterprise network and cloud network that are connected to each series of servers to distribute work amongst the servers in both networks based on criteria such as overall system performance and costs. The enterprise network may also employ one or more controllers to scale the number of cloud servers allocated to the enterprise network based on the system workload and other user-defined criteria, such as revenue generated per work request.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Li Erran LI, Thomas Woo
  • Publication number: 20110075674
    Abstract: Various embodiments relate to a Cloud Data Center, a system comprising the Cloud Data Center, and a related method. The Cloud Data Center may include a logical customer edge router to send packets between addresses in a private enterprise network and addresses in a logical network within a cloud network. The logical network may have resources, known as virtual machines, allocated to the private enterprise network and may share a common IP address space with the private enterprise network. A directory at the Cloud Data Center may correlate the enterprise IP addresses of virtual machines with a cloud IP address and a location IP address within the logical network. The Cloud Data Center may double encapsulate packets with two specified headers, a cloudIP and locIP header, when sending a packet to a destination in the logical network.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Li Erran Li, Thomas Woo
  • Publication number: 20090190511
    Abstract: A system and method for network based detection of wireless data subscribers using network address translation devices is provided. The method includes identifying a minimum number of devices showing the same internet protocol address. Packet identification sequences may include port numbers or internet protocol identification numbers. The method continues with grouping these applications by their packet identification sequences and applying detection logic where detection logic yields a conclusion that there are multiple host computers when a set of applications appears in a plurality of packet identification sequences. This method is particularly useful when internet protocol addresses are dynamic, as opposed to static. This method overcomes previous embodiments known in the art by being able to account for and work with live traffic, which enables real time detection.
    Type: Application
    Filed: January 30, 2008
    Publication date: July 30, 2009
    Inventors: Li (Erran) Li, Tian Bu, Scott C. Miller, Aiyou Chen