Patents by Inventor Masoud Olfat

Masoud Olfat 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: 20140254496
    Abstract: Resource blocks in a Long Term Evolution (LTE) network may be allocated by determining a maximum number of user equipments (UEs) in the LTE network that are permitted to transmit in a time period using a given resource block. This maximum number of UEs may be determined according to an upper limit on the overall transmission power in the LTE network for the given resource block. The given resource block may be allocated in the time period to up to the maximum number of UEs based on each UE's geographic location within the network. Related systems, methods, and devices are disclosed.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 11, 2014
    Applicant: ATC Technologies, LLC
    Inventor: Masoud Olfat
  • Patent number: 8804688
    Abstract: A method for varying pilot sub-carrier density in OFDMA communications is described. The method comprises calculating channel quality from sub-carriers; determining whether the channel quality is outside a threshold range; selecting a different pilot sub-carrier density for a sub-zone based on the value of the channel quality when the channel quality is outside the threshold range; and setting the sub-zone to the different pilot sub-carrier density. A system for using sub-zones with different pilot sub-carrier densities in OFDMA communications is also described.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: August 12, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat
  • Patent number: 8797945
    Abstract: A system and method a hybrid scheme of mode decision in a network having a plurality of mobile stations communicably coupled to a base station may include a mode decision module associated with the base station. The mode decision module may include one or more processors configured to select a first mode configuration for use during transmission of a first communication from the base station, receive first feedback information comprising a first mode recommendation and first channel information, identify a first system state of the first communication based at least in part on the first condition information, determine whether to use the first mode recommendation configuration based at least in part on the first system state, and configure the second communication using a second mode configuration based on the determination.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: August 5, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat, Dhaval Dipak Mehta
  • Patent number: 8756470
    Abstract: A system and method of increasing data throughput in a wireless communications network between a base station (BS) and one or more mobile stations (MS) includes establishing a service flow (SF) and initially enabling a hybrid automated repeat request (HARQ) protocol; determining, at a particular time, the measure of quality of the communications channel; comparing the determined measure of quality with a predetermined channel quality threshold; and selectively disabling the HARQ protocol based upon a first comparison result while continuing the SF between the BS and MS. In other aspects, after selectively disabling the HARQ protocol, the method further includes determining that the time-varying measure of quality of the communications channel has deteriorated below the predetermined channel quality threshold; and selectively re-enabling the HARQ protocol in the established SF.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: June 17, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat, Dhaval Dipak Mehta
  • Patent number: 8699445
    Abstract: A method of operating a communication system comprises exchanging initial communications between a wireless communication device and a communication network over a wireless connection between the wireless communication device and a network access system and a network connection between the wireless communication device and the communication network. The method further comprises performing a plurality of ranging processes to monitor a status of the wireless connection. Upon successfully completing a ranging process of the plurality of ranging processes, the method comprises determining a duration elapsed since the last successful ranging process and processing the duration to determine if the duration satisfies a criteria.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: April 15, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Chunmei Liu, Masoud Olfat, Feng Huang, Mohammad Hassan Partovi, David S. McGinniss
  • Patent number: 8700965
    Abstract: An apparatus and method of configuring a number of retransmissions for an automatic repeat request (ARQ) scheme (e.g., hybrid ARQ) includes configuring one or more first maximum retransmission numbers based on respective one or more first predetermined values and independent of a second maximum retransmission number. The first maximum retransmission numbers may indicate a maximum number of retransmissions related to respective service flows operational with the base station. The second maximum retransmission number may indicate a maximum number of retransmissions related to control messages transmitted in the wireless network, and may be configured based on a second predetermined value. The configuration of the first maximum retransmission numbers may include the maximum retransmissions numbers associated with a specific user in communication with the base station. Further, at least one of the first maximum retransmission numbers of a particular user may be reconfigured to a third predetermined value.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: April 15, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Chunmei Liu, Masoud Olfat
  • Patent number: 8681638
    Abstract: A method of operating a communication system comprises exchanging initial communications between a wireless communication device and a communication network over a wireless connection between the wireless communication device and a network access system and over a network connection between the wireless device and the communication network. The method further comprises, in response to a loss of the network connection due to a deterioration of the wireless connection, determining if a partial network entry process is possible to regain the connection, and if the partial network entry process is possible to regain the network connection, performing the partial network entry process. The method further comprises, in response to an improvement of the wireless connection and upon regaining the network connection, exchanging new communications between the wireless communication device and the communication network over the wireless connection and the network connection.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: March 25, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Chunmei Liu, Masoud Olfat, Feng Huang, Mohammad Hassan Partovi, David S. McGinniss
  • Patent number: 8649282
    Abstract: In one or more embodiments, a system and method of managing network channel quality in a wireless communications network includes reporting a channel quality measurement from the particular user to a base station (BS) over an available CQICH, and determining a MCS based, at least in part, upon the channel quality measurement. If a threshold network CQICH capacity is reached during a subsequent data frame such that a CQICH is no longer available, MAC level messages are generated between the BS and the particular user to trigger reporting of signal quality information to the BS by the particular user. After the next CQICH cycle commences and if a CQICH is still unavailable, the signal quality information is continued to be provided via MAC level messages. Otherwise, a CQICH is reallocated for a particular user and channel quality measurement reporting is transitioned back to the CQICH.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: February 11, 2014
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat
  • Publication number: 20140036743
    Abstract: A node of a wireless network is configured to arrange a frequency division duplex communications link from the node to a user equipment using a downlink frequency carrier having a downlink frequency bandwidth, and from the user equipment to the node by selectively using either a first uplink frequency carrier having a first uplink frequency bandwidth or a second uplink frequency carrier that is spaced apart in frequency from the first uplink frequency carrier and having a second uplink frequency bandwidth. The first uplink frequency carrier may initially be assigned to the user equipment, and the user equipment may be subsequently selectively handed over the second uplink frequency carrier, while continuing to use the downlink frequency carrier. Related nodes, user equipment and operating methods are described.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventor: Masoud Olfat
  • Publication number: 20140036837
    Abstract: In one or more embodiments, a system and method of managing network channel quality in a wireless communications network includes reporting a channel quality measurement from the particular user to a base station (BS) over an available CQICH, and determining a MCS based, at least in part, upon the channel quality measurement. If a threshold network CQICH capacity is reached during a subsequent data frame such that a CQICH is no longer available, MAC level messages are generated between the BS and the particular user to trigger reporting of signal quality information to the BS by the particular user. After the next CQICH cycle commences and if a CQICH is still unavailable, the signal quality information is continued to be provided via MAC level messages. Otherwise, a CQICH is reallocated for a particular user and channel quality measurement reporting is transitioned back to the CQICH.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Applicant: CLEARWIRE IP HOLDINGS LLC
    Inventors: Sungki PARK, Masoud OLFAT
  • Publication number: 20130315148
    Abstract: A system and method for adaptive control of an averaging parameter in a communications network may include an averaging parameter adaptive control module (APAC) that is associated with a base station and that includes one or more processors configured to generate a first averaging parameter that is transmitted by the base station to a mobile station communicating with the base station. The mobile station may use the first averaging parameter to generate first channel condition information that indicates a condition of a communication channel. First feedback information including the first channel condition information may be received at the base station. The APAC may generate a second averaging parameter using the first averaging parameter and the first feedback information and may transmit the second averaging parameter from the base station to the mobile station, thereby adaptively controlling the second averaging parameter based on the first feedback information.
    Type: Application
    Filed: August 5, 2013
    Publication date: November 28, 2013
    Applicant: Clearwire IP Holdings LLC
    Inventors: Sungki PARK, Masoud OLFAT, Dhaval Dipak MEHTA
  • Patent number: 8521214
    Abstract: A first amount of bandwidth is allocated to a first wireless device to send signal quality information to a base station. Based on a first indicator of wireless link conditions associated with the first wireless device, and a second indicator of wireless link conditions associated with a second wireless device, a second amount of bandwidth is allocated to the first wireless device to send signal quality information to the base station.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: August 27, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat, Dhaval Dipak Mehta
  • Patent number: 8520633
    Abstract: A method of operating a communication system comprises performing a plurality of ranging processes to establish a network connection over a wireless link. A time interval is established for a wireless device timer at the wireless device upon establishing the network connection and a time interval is established for an access node timer at the access node upon establishing the network connection. The method also comprises establishing a communication session over the wireless link and network connection. When a repeat request acknowledgement message is received during the communication session, the time interval for the wireless device timer and the time interval for the access node timer is restarted.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: August 27, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Chunmei Liu, Masoud Olfat
  • Patent number: 8509156
    Abstract: A system and method for adaptive control of an averaging parameter in a communications network may include an averaging parameter adaptive control module (APAC) that is associated with a base station and that includes one or more processors configured to generate a first averaging parameter that is transmitted by the base station to a mobile station communicating with the base station. The mobile station may use the first averaging parameter to generate first channel condition information that indicates a condition of a communication channel. First feedback information including the first channel condition information may be received at the base station. The APAC may generate a second averaging parameter using the first averaging parameter and the first feedback information and may transmit the second averaging parameter from the base station to the mobile station, thereby adaptively controlling the second averaging parameter based on the first feedback information.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: August 13, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat, Dhaval Dipak Mehta
  • Patent number: 8424085
    Abstract: A plurality of ranging processes are performed to monitor a status of a wireless link associated with a device identifier. A ranging request that includes the device identifier and a message skip indicator is received. It is determined that the device identifier is already associated with the wireless link. A duration since a previously completed ranging process is determined. Based on the duration, and the message skip indicator, it is determined whether to respond to the ranging request.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: April 16, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Masoud Olfat, Sungki Park, Dhaval Dipak Mehta
  • Publication number: 20130070629
    Abstract: A system and method of increasing data throughput in a wireless communications network between a base station (BS) and one or more mobile stations (MS) includes establishing a service flow (SF) and initially enabling a hybrid automated repeat request (HARQ) protocol; determining, at a particular time, the measure of quality of the communications channel; comparing the determined measure of quality with a predetermined channel quality threshold; and selectively disabling the HARQ protocol based upon a first comparison result while continuing the SF between the BS and MS. In other aspects, after selectively disabling the HARQ protocol, the method further includes determining that the time-varying measure of quality of the communications channel has deteriorated below the predetermined channel quality threshold; and selectively re-enabling the HARQ protocol in the established SF.
    Type: Application
    Filed: November 12, 2012
    Publication date: March 21, 2013
    Applicant: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat, Dhaval Dipak Mehta
  • Patent number: 8380198
    Abstract: A system and method for handoff are provided. A mobile station performs a make-before-break handoff of a control channel between a serving and target base station and a break-before-make handoff of a traffic channel between the serving and target base stations. The traffic channel handoff is performed after the control channel handoff has completed.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: February 19, 2013
    Assignee: Nextel Communications Inc.
    Inventors: Kamran Etemad, Masoud Olfat
  • Patent number: 8355747
    Abstract: Systems and methods for dual wireless communication technology communications are provided. A mobile station communicates with two transceivers of a base site, where each transceiver operates according to a different wireless communication technology. The mobile station can communicate uplink and downlink control information with a first transceiver of the base site while also communicating uplink and downlink data with a second transceiver. Alternatively, the mobile station may transmit uplink transmissions only to a first transceiver and only receive downlink transmissions from a second transceiver.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: January 15, 2013
    Assignee: Nextel Communications Inc.
    Inventors: Barry West, Alireza Afrashteh, Masoud Olfat, Douglas A. Hyslop, Rajesh M. Gangadhar
  • Patent number: 8325670
    Abstract: A method, apparatus, and computer-readable medium for performing asymmetric frequency division duplexing (FDD) are provided. The method includes allocating a first bandwidth for an uplink portion of an FDD data transmission; and allocating a second bandwidth for a downlink portion of the FDD data transmission; wherein the first bandwidth and the second bandwidth have different sizes.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: December 4, 2012
    Assignee: Nextel Communications, Inc.
    Inventors: Alireza Afrashteh, Masoud Olfat, Douglas A. Hyslop, Rajesh M. Gangadhar
  • Patent number: 8312337
    Abstract: A system and method of increasing data throughput in a wireless communications network between a base station (BS) and one or more mobile stations (MS) includes establishing a service flow (SF) and initially enabling a hybrid automated repeat request (HARQ) protocol; determining, at a particular time, the measure of quality of the communications channel; comparing the determined measure of quality with a predetermined channel quality threshold; and selectively disabling the HARQ protocol based upon a first comparison result while continuing the SF between the BS and MS. In other aspects, after selectively disabling the HARQ protocol, the method further includes determining that the time-varying measure of quality of the communications channel has deteriorated below the predetermined channel quality threshold; and selectively re-enabling the HARQ protocol in the established SF.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: November 13, 2012
    Assignee: Clearwire IP Holdings LLC
    Inventors: Sungki Park, Masoud Olfat, Dhaval Dipak Mehta