Patents by Inventor Saad Z. Asif

Saad Z. Asif 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: 8243632
    Abstract: To provide high-data-rate wireless communication in both directions between a pair of nodes, the present invention provides for operating at least two asymmetric wireless connections in parallel but in reverse directions between the nodes. One of the asymmetric wireless connections will provide a high-data-rate forward link in one direction between the nodes, while the other asymmetric wireless connection will concurrently provide a high-data-rate forward link in the other direction between the nodes. The lower-data-rate reverse links provided by the asymmetric wireless connections can then be used to carry overhead control data or can be used to supplement the primary high-data-rate communication provided by the forward links. Preferably, 1xEV-DO will be used for both asymmetric wireless data links, but other asymmetric air interface protocols could be used instead.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: August 14, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Dae-Sik Oh, Tim W. Sill, Thomas M. Steele, Saad Z. Asif, Leo R. Anderson, Jr.
  • Patent number: 7480485
    Abstract: A wireless repeater for receiving, amplifying and transmitting one or more wireless signals. The repeater comprises a signal processing device for determining one or more attributes of a wireless signal received from a base transceiver station and a memory for storing a reference list that includes a list of one or more preferred frequency bandwidths to be received, amplified and transmitted. The repeater further comprises a controller coupled with the signal processing device for comparing the one or more attributes of the wireless signal from the base transceiver station with the reference list, where the controller selects a first active set of one or more frequency bandwidths from the preferred frequency bandwidths based on the comparison.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: January 20, 2009
    Assignee: Sprint Spectrum L.P.
    Inventors: Dae-Sik Oh, Mark L. Yarkosky, Kristin A. Hayne, John Cheong Wai Ngan, Saad Z. Asif, Shiva Narayanabhatla
  • Patent number: 7480486
    Abstract: A wireless repeater and method for managing air interface communications is provided. A repeater may include a donor antenna, a coverage antenna, a mobile station modem, a processor, and data storage. The donor antenna will receive a plurality of air interface beams on the forward link from a radio access network. The coverage antenna will pass each forward link beam received to a mobile station being served by the repeater. Further, the donor antenna will pass each forward link air interface beam to the MSM, where the MSM will apply a rake receiver to identify a signal characteristic of the forward link of each beam received, and the processor will record in the data storage the signal characteristic corresponding to each beam. Given this data, the repeater will select an air interface beam with the most preferable signal characteristic, and will keep only this beam active for reverse link communications.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: January 20, 2009
    Assignee: Sprint Spectrum L.P.
    Inventors: Dae-Sik Oh, Mark L. Yarkosky, Saad Z. Asif
  • Patent number: 7299005
    Abstract: A wireless repeater for receiving, amplifying and transmitting one or more wireless signals. The repeater comprises a signal processing device for determining one or more attributes of a wireless signal received from a mobile device and a memory for storing a reference list that includes one or more preferred frequency bandwidths to be repeated. The repeater also comprises a controller coupled with the signal processing device for comparing the one or more attributes of the wireless signal with the reference list, wherein the controller selects a first active set of one or more frequency bandwidths from the preferred frequency bandwidths based on the comparison. The repeater still further comprises a first reception filter coupled with the controller, where the first reception filter, responsive to control signal(s) from the controller, filters out signals, communicated to the first reception filter, having frequencies outside the first active set of frequency bandwidths.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: November 20, 2007
    Assignee: Sprint Spectrum L.P.
    Inventors: Mark L. Yarkosky, Dae-Sik Oh, Saad Z. Asif, Kristin A. Hayne, Shiva Narayanabhatla, John Cheong Wai Ngan
  • Patent number: 6980523
    Abstract: A method and system for facilitating end-to-end quality of service in a 3G packet data network. A packet-data session is set up between a mobile station and a packet-data network, via a base station and a packet data serving node (PDSN). The base station manages quality of service for the session as it passes over the air interface, and the PDSN manages quality of service for the session as it passes into the packet-data network. The PDSN translates between quality of service on the packet-data network and quality of service on the air interface, and the PDSN and base station communicate the quality of service information, so that both the base station and PDSN can work to set up consistent levels of quality of service on their respective links.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: December 27, 2005
    Assignee: Sprint Spectrum L.P.
    Inventors: Mark A. Lipford, Manish Mangal, Kevin R. O'Connor, Xianghong Zeng, Mustafa Matalgah, Saad Z. Asif