Patents by Inventor Hamid Ahmadi

Hamid Ahmadi 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: 20200088744
    Abstract: A method for measuring bilirubin concentration in a sample includes preparing a sensing element, where the sensing element may include a plurality of carbon dots, adding the sample to the sensing element, where the sample may include a plurality of bilirubin molecules, obtaining a first grayscale image of the sensing element under ultra-violate (UV) irradiation, irradiating visible light with a wavelength between 470 nm and 490 nm on the sensing element, obtaining a second grayscale image of the sensing element under ultra-violate (UV) irradiation, calculating a light intensity difference by calculating a difference between a first average light intensity of the first grayscale image and a second average light intensity of the second image, and determining the bilirubin concentration based on a correlation between the bilirubin concentration and the light intensity difference.
    Type: Application
    Filed: November 18, 2019
    Publication date: March 19, 2020
    Applicant: Chemistry & Chemical Engineering Research Center of Iran(CCERCI)
    Inventors: Hamed Golmohammadi Ghane, Raziyeh Sadat Tabatabaee, Seyyed Hamid Ahmadi
  • Patent number: 9754096
    Abstract: A method for providing an update package to a node in a mesh network comprising a set of nodes and a gateway node arranged to provide access to an update server via a second network. The gateway node collects package information from each set node, including a first node. Each package identifies a respective node and its package version. The gateway node may query the update server based on the package information. The update server may respond to the gateway node with an updated package for the first node. The gateway node broadcasts the updated package into the mesh network as a sequence of mesh messages. Each of a first plurality of nodes of the set may forward the mesh messages to other nodes. The first node stores the mesh messages so as the sequence of mesh messages is received, assemble the updated package.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: September 5, 2017
    Assignee: QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD.
    Inventors: Mauro Scagnol, Srdjan Miocinovic, Hooman Borghei, Dragan Boscovic, Hamid Ahmadi, Nicolas Guy Albert Graube, Robin Heydon, Nicholas John Jones, Clive Thomson
  • Publication number: 20150245182
    Abstract: A method for providing an update package to a node in a mesh network comprising a set of nodes and a gateway node arranged to provide access to an update server via a second network. The gateway node collects package information from each set node, including a first node. Each package identifies a respective node and its package version. The gateway node may query the update server based on the package information. The update server may respond to the gateway node with an updated package for the first node. The gateway node broadcasts the updated package into the mesh network as a sequence of mesh messages. Each of a first plurality of nodes of the set may forward the mesh messages to other nodes. The first node stores the mesh messages so as the sequence of mesh messages is received, assemble the updated package.
    Type: Application
    Filed: October 2, 2014
    Publication date: August 27, 2015
    Applicant: Cambridge Silicon Radio Limited
    Inventors: Mauro Scagnol, Srdjan Miocinovic, Hooman Borghei, Dragan Boscovic, Hamid Ahmadi, Nicolas Guy Albert Graube, Robin Heydon, Nicholas John Jones, Clive Thomson
  • Patent number: 6597671
    Abstract: In a wireless communication system (106), base stations (118, 120) are connected to a backbone network (116) such as a wired LAN and act as access points and relays for remote stations (128, 132, 136). A remote station registers and performs bidirectional communication with one of the base stations designated as its home base station. Base stations have overlapping coverage areas where a remote station is within reception range of several base stations. Such communication system may for instance be a multicell radio LAN using frequency hopping signaling. The method allows to reuse a limited number of network resources such as frequency hopping patterns and assign the same resource to several active base stations.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: July 22, 2003
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David Bantz, Frederic Bauchot, Colin Harrison, Arvind Krishna, Jose Louis Martinez, Kadathur Natarajan, Michelle Wetterwald
  • Patent number: 5870385
    Abstract: In a wireless communication system (106), base stations (118, 120) are connected to a backbone network (116) such as a wired LAN and act as access points and relays for remote stations (128, 132, 136). A remote station registers and performs bidirectional communication with one of the base stations designated as its home base station. Base stations have overlapping coverage areas where a remote station is within reception range of several base stations. Such communication system may for instance be a multicell radio LAN using frequency hopping signaling. The method allows reuse of a limited number of network resources such as frequency hopping patterns and assign the same resource to several active base stations.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: February 9, 1999
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David Bantz, Frederic Bauchot, Colin Harrison, Arvind Krishna, Jose Louis Martinez, Kadathur Natarajan, Michelle Wetterwald
  • Patent number: 5781536
    Abstract: In a wireless communication system (106), base stations (118, 120) are connected to a backbone network (116) such as a wired LAN and act as access points and relays for remote stations (128, 132, 136). A remote station registers and performs bidirectional communication with one of the base stations designated as its home base station. Base stations have overlapping coverage areas where a remote station is within reception range of several base stations. Such communication system may for instance be a multicell radioLAN using frequency hopping signaling. The method allows reuse of a limited number of network resources such as frequency hopping patterns and assign the same resource to several active base stations.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 14, 1998
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David Bantz, Frederic Bauchot, Colin Harrison, Arvind Krishna, Jose Louis Martinez, Kadathur Natarajan, Michelle Wetterwald
  • Patent number: 5613198
    Abstract: A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then is dynamically allocated by time division to each of the cells in the assigned group according to user demand in each of the cells thereof.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: March 18, 1997
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Amotz Bar-Noy, Ilan Kessler, Arvind Krishna
  • Patent number: 5533026
    Abstract: A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: July 2, 1996
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Frederic J. Bauchot, Roselyne Bonnet, Ilan Kessler, Arvind Krishna, Fabien P. Lanne, Mahmoud Naghshineh, Catherine Solar, Michelle M. Wetterwald
  • Patent number: 5477530
    Abstract: First and second multi-node communication paths are connected via a bridge node. Each path employs a quota allocation scheme for access thereto by the nodes thereon. A first quota allocation signal is propagated on the first path and a second quota allocation signal is propagated on the second path, the second signal controlling access to the second path for the purpose of transmitting information to the bridge node destined for the first path. The quota allocation signals are synchronized to ensure that there is at most one circulation of the second quota allocation signal for each circulation of the first quota allocation signal. Information from the first path to the second path is deflected from the bridge node and around the first path if the bridge node is full. If the information is transmitted in sequenced packets, a deflected packet is assigned a deflection number. The bridge node tracks deflections via the deflection numbers.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: December 19, 1995
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Jeane S. Chen, Krishna Arvind, Ofek Yoram
  • Patent number: 5384777
    Abstract: A Medium Access (MAC) Protocol is utilized for wireless radio access for a plurality of remote stations to a base station on a LAN. There is a time division fixed frame structure in which time is slotted, and time slots are grouped into fixed frames consisting of data and control subframes or periods. The fixed frame structure consists of three periods (A, B, and C) along with their respective headers. The first period, the A period, is used exclusively for data transfer from the base station to the remote stations. The following period, the B period, is used for contention-free data transfer from the remote stations to the base station. The allocation of the data slots in the A and B periods is performed by the base station. The last period of the frame, designated as the C period, is used for the transmission of reservation requests and data from the remote stations to the base station in a random-access contention mode using a slotted Aloha protocol.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: January 24, 1995
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, David F. Bantz, Frederic J. Bauchot, Arvind Krishna, Richard O. La Maire, Kadathur S. Natarajan
  • Patent number: 5311513
    Abstract: A congestion control system for packet communications networks in which access to the network is controlled to prevent such congestion. Packets within the prespecified statistical description of each packet source are marked as high priority ("green" packets) while packets exceeding the pre-specified characteristics are marked with a lower priority ("red" packets). The overall red packet rate is limited to prevent red packet saturation of the network. Packets are marked red for a continuous train of successive red packets. The introduction of red packets into the network is subjected to a degree of hysteresis to provide better interaction with higher layer error recovery protocols. The amount of hysteresis introduced into the red packet marking can be fixed or varied, depending on the statistics of the incoming data packets at the entry point to the network.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: May 10, 1994
    Assignee: International Business Machines Corp.
    Inventors: Hamid Ahmadi, Jeffrey, H. Derby, Roch Guerin, Levent Gun, Gerald A. Marin, Mahmoud Naghshineh, Khosrow Sohraby
  • Patent number: 5289462
    Abstract: In a packet communications network, the addition or deletion of a connection to the network by a user is governed by a link traffic metric which represents the effective capacity of each link in the network which participates in the packet connection route. The link metric is calculated in real-time and updated by simple vector addition or subtraction. Moreover, this link metric is also used to calculate leaky bucket parameters which govern the access of packets to the network once the connection is set up. A packet network using these link metrics and metric generation techniques provides maximum packet throughput while, at the same time, preserving grade of service guarantees.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: February 22, 1994
    Assignee: International Business Machines Corp.
    Inventors: Hamid Ahmadi, Roch Guerin, Levent Gun
  • Patent number: 5233604
    Abstract: A packet communications system utilizes a route determining mechanism by identifying principal paths between the source and the destination in the system. Principal paths are minimum hop count paths with a transmission delay less than a specified threshold. Principal path links are accepted as legs of the optimum path, if feasible, i.e., if the resulting load on the link is less than a specified principal threshold. Secondary links are accepted only if the resulting load on the link is less than a specified secondary threshold, where the secondary threshold is less than the principal threshold. All paths must also have a transmission delay less than a specified threshold. Each request for a route includes the source node, the destination node, the load required, the maximum transmission delay and, if desired, the quality of service parameters which all of the legs of the route must satisfy.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: August 3, 1993
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Jeane S. Chen, Chee-Seng Chow, Roch Guerin, Levent Gun, Anthony M. Lee, Theodore E. Tedijanto
  • Patent number: 5008878
    Abstract: In a switching system interconnecting transmission links (21-i, 23-i) on which circuit switched (CS) and packet switched (PS) information is transferred, a switch fabric (11) is provided which interconnects a plurality of input ports (15-i) to a plurality of output ports (19-i). The information arriving on incoming links is converted in switch adapters (13-i) to uniform minipackets, each having a routing address designating the required output port. The switch fabric consists of parallel equal switching slices, e.g. binary routing trees (71), which transfer in a non-blocking manner each minipacket from its input port to one output port in response to the routing address. Collecting means (73, 75) are provided at each output port for accepting the minipackets arriving from the different input ports.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: April 16, 1991
    Assignee: International Business Machines Corporation
    Inventors: Hamid Ahmadi, Johannes G. Beha, Wolfgang E. Denzel, Antonius P. Engbersen, Ronald P. Luijten, Charles A. Murphy, Erich Port