Patents by Inventor Saad Ahmad

Saad Ahmad 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: 20130003697
    Abstract: A method and apparatus for home Node-B (HNB) mobility with a local IP access (LIPA) packet data network (PDN) connection are described. A target home node-B (HNB) may receive a handover request message from a source HNB to handover a wireless transmit/receive unit (WTRU). A path switch request may be transmitted to a local gateway (LGW) to change a downlink data path towards the target HNB in response to the handover request message. The LGW may act as a mobility management and local mobility anchor for the handover; and informing an HNB gateway (GW) about the handover so that the downlink data path for core network (CN) traffic is modified towards the target HNB.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 3, 2013
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Pascal M. Adjakple, Saad Ahmad, Mahmoud Watfa, Ulises Olvera-Hernandez
  • Publication number: 20130003698
    Abstract: Methods and apparatus are disclosed that determine whether service continuity is allowed in a target cell for a wireless transmit/receive unit (WTRU) connected to a source local gateway (LGW) via a local internet protocol access (LIPA) Packet Data Network (PDN) connection. The existence of a connection between the source LGW and a target LGW is also determined. Whether the WTRU user settings allow service continuity is determined. On a condition that service continuity is not allowed for the target LGW or for the WTRU, the LIPA PDN connection is deactivated. On a condition that service continuity is allowed for the target network and for the WTRU, the LIPA PDN connection is maintained. Methods for handling handover, paging and emergency calls are also described herein.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Ulises Olvera-Hernandez, Mahmoud Watfa, Saad Ahmad
  • Publication number: 20120294236
    Abstract: Methods and apparatus are described for transmitting and receiving data by a wireless transmit/receive unit (WTRU) over the control plane. The methods may receive data without the use of an Internet Protocol (IP) address. In an example method, a WTRU may enter an evolved packet system (EPS) mobility management (EMM)-registered control plane only (CPO) state after receiving an attach accepted message for CPO operation, and enter an EMM-deregistered state after receiving a detach message, a tracking area update (TAU) reject message or an attach reject message. In another method, a WTRU may switch between operational modes that use an IP address and a user plane to transmit and receive data, and the CPO mode.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 22, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Mahmoud Watfa, Ulises Olvera-Hernandez, Pascal M. Adjakple, Kai Liu, Peter S. Wang, Saad Ahmad, Behrouz Aghili
  • Publication number: 20120281566
    Abstract: Method and apparatus for controlling connectivity to a network for intermittent data services are disclosed. A new dormant mode is defined such that a wireless transmit/receive unit (WTRU) may transition from a connected state or an idle state to the dormant mode based on triggering conditions. The WTRU may transition from a connected state or an idle state to a dormant mode if the characteristic or the priority of the data matches a characteristics or a priority for the dormant mode and operate using configuration which is different from configuration used for the connected state or the idle state. The WTRU in the dormant mode may perform a WTRU-controlled mobility procedure. The WTRU in the dormant mode may maintain a dedicated resource, such as a cell radio network temporary identity (C-RNTI), for receiving a unicast traffic from the network.
    Type: Application
    Filed: March 30, 2012
    Publication date: November 8, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Ghyslain Pelletier, Ulises Olvera-Hernandez, Mahmoud Watfa, Saad Ahmad
  • Publication number: 20120275310
    Abstract: A method and apparatus are described for controlling the application of Selected Internet Protocol (IP) traffic offload (SIPTO) or Local IP Access (LIPA) services for a wireless transmit/receive unit (WTRU). The SIPTO and LIPA services may be performed over packet data network (PDN) connections. A user of the WTRU may be prompted to accept or reject the usage of the SIPTO or LIPA services. The user of the WTRU may request switching from SIPTO or LIPA services to non-SIPTO or non-LIPA services.
    Type: Application
    Filed: April 4, 2012
    Publication date: November 1, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Mahmoud Watfa, Pascal M. Adjakple, Kai Liu, Saad Ahmad, Ulises Olvera-Hernandez, Peter S. Wang
  • Publication number: 20120276865
    Abstract: A method and apparatus for performing non-voice emergency services (NOVES) between a wireless transmit/receive unit (WTRU) and a public safety answering point (PSAP) is disclosed. A NOVES session may be initiated by sending a NOVES initiation request message that includes information relating to the NOVES capabilities of the WTRU, and information relating to an emergency situation. The information relating to the NOVES capabilities of the WTRU may include an indication of whether the WTRU supports a fake power-off mode, or whether the WTRU supports PSAP control. Other methods are disclosed that include a method for a PSAP combining a multiple NOVES sessions, and a method for handing over a NOVES session having multiple media streams.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 1, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Peter S. Wang, Kai Liu, Pascal M. Adjakple, Saad Ahmad, Ulises Olvera-Hernandez, Virgil Comsa, Mahmoud Watfa
  • Publication number: 20120134328
    Abstract: Described herein are methods, apparatus and architecture for dynamic spectrum management (DSM) including protocol stacks, logical entities and functionalities that support DSM operation in opportunistic spectrum such as television white space (TVWS). The architecture supports aggregating bandwidth at the internet protocol (IP) layer over licensed and opportunistic bands as well as noncontiguous spectrum aggregation at the medium access control (MAC) layer. The control plane protocol stack includes a multi network transport protocol (MNTP), a channel management (CM) protocol, a policy protocol, a medium access control (MAC) entity, a physical entity and an air interface, all of which are configured to allocate, monitor, and update aggregated spectrum resources with respect to a DSM client.
    Type: Application
    Filed: October 10, 2011
    Publication date: May 31, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Jean-Louis Gauvreau, Martino M. Freda, Parul Mudgal, Athmane Touag, Liangping Ma, Chunxuan Ye, Rocco DiGirolamo, Angelo A. Cuffaro, Saad Ahmad
  • Publication number: 20120120892
    Abstract: A dynamic spectrum management (DSM) system includes a plurality of stations and a central entity. A plurality of different radio access technologies are deployed in the DSM system and the central entity coordinates and manages wireless communications in the network. A direct link station receives a beacon periodically from an access point (AP). The direct link station may receive a direct link synchronization message from the AP indicating that a following target beacon transmission time (TBTT) is a synchronization TBTT (STBTT). The direct link station may silence the direct link channels during the STBTT. The direct link station may perform carrier sense multiple access (CSMA) on a primary channel of the direct link to get an access to all direct link channels. A connectivity map procedure may be performed to establish a map for connectivity, services, or capabilities of the devices in the network.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 17, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Martino M. Freda, Saad Ahmad, Rocco DiGirolamo, Athmane Touag, Jean-Louis Gauvreau, Francois Periard
  • Publication number: 20120113918
    Abstract: Described herein is a silent period method and apparatus for dynamic spectrum management. The methods include configuration and coordination of silent periods across an aggregated channel in a wireless communication system. A silent period management entity (SPME) dynamically determines silent period schedules for channels based on system and device information and assigns a silent period duration and periodicity for each silent period. The SPME may reconfigure the silent period schedule based on system delay, system throughput, channel quality or channel management events. A silent period interpretation entity (SPIE) receives and implements the silent period schedule. The silent periods for the channels may be synchronized, independent, or set-synchronized.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 10, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Martino M. Freda, Liangping Ma, Saad Ahmad, Jean-Louis Gauvreau, Alpaslan Demir, Chunxuan Ye
  • Publication number: 20120094681
    Abstract: A method for managing channel selection in a dynamic spectrum management network includes receiving a spectrum allocation request; based on the source of the spectrum allocation request, checking for available channels; based on the source of the spectrum allocation request, collecting sensing and usage data for the available channels; providing the channel usage data to an entity that transmitted the spectrum allocation request.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 19, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Martino M. Freda, Parul Mudgal, Jean-Louis Gauvreau, Athmane Touag, Rocco DiGirolamo, Amith V. Chincholi, Joseph M. Murray, Chunxuan Ye, Scott Laughlin, Zinan Lin, Alexander Reznik, Saad Ahmad, Joseph A. Kwak, Juan Carlos Zuniga, Angelo A. Cuffaro
  • Publication number: 20120026941
    Abstract: Techniques for sending an aggregated beacon in a cognitive wireless network are disclosed. A beacon device may segment beacon information and send beacon segments via a plurality of channels simultaneously. A certain information elements of the beacon information may be included in each beacon segment. Each beacon segment may include channel information for other beacon segments that are transmitted simultaneously. Alternatively, a discovery beacon may be transmitted in addition to a regular beacon. The discovery beacon may include information indicating an operating channel on which the regular beacon is transmitted. The discovery beacon may be transmitted using a predetermined channel bandwidth, with a smaller beacon interval than the regular beacon, or in a frequency hopping fashion. The discovery beacon may be sent on a channel selected based on a regulatory class and corresponding channel information. The discovery beacon may be transmitted on a side channel.
    Type: Application
    Filed: February 24, 2011
    Publication date: February 2, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Saad Ahmad, Jean-Louis Gauvreau, Rocco DiGirolamo, Zinan Lin, Joseph Murray, Alexander Reznik, Alpaslan Demir, Angelo A. Cuffaro, Zaid Al-Khatib
  • Publication number: 20110287802
    Abstract: Systems and methods for dynamic white space management are described. First, local handling of channel queries, in which a channel query by a white space device (WSD) is handled by a local dynamic spectrum management (DSM) server, if the DSM server has all the information necessary for providing a response to the channel query. Second, a search extension, in which a WSDB passes part of a search for available channels to a local DSM server. Third, assisting of an available channel calculation, in which a DSM server provides spectrum sensing information to WSDBs to improve the available channel calculation within the WSDBs. And fourth, dynamic bandwidth management to meet the coexistence requirements. In addition, the content of the messages and procedures that enable the above value-adding functions and interactions with the WSDB systems are described.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 24, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Liangping Ma, Chunxuan Ye, Saad Ahmad, Alpaslan Demir, Rocco Di Girolamo, Jean-Louis Gauvreau, Alexander Reznik, Angelo A. Cuffaro
  • Publication number: 20110205969
    Abstract: Method and apparatus having a beamforming antenna generates a plurality of directional antenna beams. A discovery beacon is generated for use in associating with a wireless transmit/receive unit (WTRU). The discovery beacon is transmitted to a plurality of sectors using coarsely focused directional antenna beams. A WTRU may receive one of the coarsely focused directional antenna beams, and may then transmit a response message. Finely focused directional antenna beams are establishing for packet data transmission. A periodic beacon may then be transmitted to the WTRU using one of the coarsely focused directional antenna beams.
    Type: Application
    Filed: February 24, 2011
    Publication date: August 25, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Saad Ahmad, Jean-Louis Gauvreau, Rocco DiGirolamo, Sudheer A. Grandhi