Patents by Inventor Stelios J. Patsiokas

Stelios J. Patsiokas 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: 10567471
    Abstract: Hybrid file delivery systems and methods divide one or more files into parts for transmission to plural user devices during a first transmission phase employing one or more one-to-many communication paths (e.g., broadcast or multicast), and then transmit missing file parts to designated user devices during a second transmission phase employing respective one-to-one communication paths. User devices are configured with specified criteria for when and how to report file delivery status to a file delivery center that maintains a database of target user devices, file delivery campaigns, and statuses of file delivery completion at the user devices. The file delivery center can employ the database information to determine cost benefit for delivery of a file using two different transmission modalities and control when to switchover to or commence the second transmission phase after the first transmission phase.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: February 18, 2020
    Assignee: Sirius XM Radio Inc.
    Inventors: Stelios J. Patsiokas, Richard A. Michalski, Paul D. Marko, Mark Rindsberg, Stuart Cox, David G. Mantel
  • Publication number: 20150271247
    Abstract: Hybrid file delivery systems and methods divide one or more files into parts for transmission to plural user devices during a first transmission phase employing one or more one-to-many communication paths (e.g., broadcast or multicast), and then transmit missing file parts to designated user devices during a second transmission phase employing respective one-to-one communication paths. User devices are configured with specified criteria for when and how to report file delivery status to a file delivery center that maintains a database of target user devices, file delivery campaigns, and statuses of file delivery completion at the user devices. The file delivery center can employ the database information to determine cost benefit for delivery of a file using two different transmission modalities and control when to switchover to or commence the second transmission phase after the first transmission phase.
    Type: Application
    Filed: October 25, 2013
    Publication date: September 24, 2015
    Inventors: Stelios J. Patsiokas, Richard A. Michalski, Paul D. Marko, Mark Rindsberg, Stuart Cox, David G. Mantel
  • Patent number: 5471146
    Abstract: A return loss meter (100) for base stations comprises a first transceiver (10) having a first transmitter (12), a first receiver (22 and 30), and a first antenna (20), a second transceiver (50) having a second transmitter (52), a second receiver (62 and 70), and a second antenna (60), wherein the first transceiver and the second transceiver are cross-coupled using at least one directional coupler (16) capable of being switched. The return loss meter includes a device for measuring reflected and transmitted power of the first antenna via a first directional coupler (16) capable of being switched and via a device (74) capable of measuring received signal strength at the second receiver and a device for measuring reflected and transmitted power of the second antenna via a second directional coupler (56) capable of being switched and via a device (34) capable of measuring received signal strength at the first receiver.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: November 28, 1995
    Assignee: Motorola, Inc.
    Inventors: Paul D. Krayeski, Paul D. Marko, Stelios J. Patsiokas
  • Patent number: 5461558
    Abstract: A remote meter reading system (10) includes a group of meter interface units in which each meter interface unit (12) operates between periods of activity and inactivity. The meter interface unit has stored first (400) and second (500) operational schedules, and a third schedule (600) which is used to determine whether to use the first (400) or second (500) schedule. The first (400) and second (500) schedules inform controller (26) when to provide a control signal to power control circuit (27) in order to stop the flow of battery energy from battery (25) to communication unit (24). Thereby, conserving valuable battery energy during those periods of time when the meter interface unit (12) is not likely to be interrogated by meter reading device (15).
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: October 24, 1995
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Ronald L. Bane, James M. Barlow
  • Patent number: 5430769
    Abstract: The present invention comprises a method and apparatus for selecting one of at least two antennas (202, 204) in a communication unit (200) for use in a wireless communication system (100). A signal is received by a radio frequency receiver during a receiving period from one of the at least two antennas (202,204) currently selected by an antenna switch (206), the signal having a plurality of bits. The receiver is capable of determining the quality of the receive signal by determining if the incoming bits transition periods fall within a predetermined time window. If it is determined by the receiver that the quality of the receive signal is below a predetermined threshold the currently selected antenna (202 or 204) is switched. The currently selected antenna remains selected when the currently selected antenna has been selected within a predetermined amount of time.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: July 4, 1995
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Craig P. Wadin, Paul D. Marko
  • Patent number: 5396648
    Abstract: A method and apparatus whereby a communication unit (10) transmits a communication channel request and the nearest base site (12) makes the communication channel grant or allocation. A base site receives the channel request signal, measures the received signal strength (RSSI) level of the received signal, and if that level is above a threshold level, a communication channel is allocated to the requesting communication unit, thus establishing a communication link. If the channel request signal does not have an RSSI level above the threshold, the base site delays the grant of a communication channel for a period inversely proportional to the measured RSSI level to allow other base sites the opportunity to grant a communication channel to the requesting communication unit. If the base site determines that another base site has granted a communication channel to the requesting communication unit, the allocation process is stopped, and the base site continues scanning for channel request signals.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: March 7, 1995
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Thomas V. D'Amico, Charles D. Suter, Raul A. Pombo
  • Patent number: 5392331
    Abstract: A method and apparatus in a digital wireless communication system (100) controls an inter-cell hand-off. First and second fixed units (102) receive a common synchronization signal from a controller (104), and a first wireless link is established between the first fixed unit and a portable unit (120) on a first frequency. The first wireless link is synchronized to the common synchronization signal, and frame synchronization is obtained between the fixed unit (102) and the portable unit (120) during establishment of the first wireless link. Frame synchronization is maintained only by maintaining bit synchronization while transmitting user data on the first frequency. A second wireless link is established between the second fixed unit (102) and the portable unit (120) on the first frequency if the first frequency is usable therebetween. The second wireless link is synchronized to the common synchronization signal.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: February 21, 1995
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Craig Wadin, Paul Marko, Prathivadhi B. Krishna
  • Patent number: 5373547
    Abstract: A method for handset spectrum registration in cordless telephone systems having base stations operating in a first spectrum (102) and a second spectrum (101) where the first and second spectrums have a portion (103) of overlapping spectrum ranges comprises the steps at a handset (206) of scanning (18) the portion of overlapping spectrum ranges provided by a base station which is either a first base station having the first spectrum range or a second base station having the second spectrum and then choosing (20) a channel within the overlapping spectrum ranges substantially free from interference and designating the channel as the initial link establishment channel and as a re-establishment channel for subsequent re-establishment links. The handset then sends (22) a re-establishment link request to the base station to have the base re-establish a link with the re-establishment channel on the handset.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: December 13, 1994
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Kenneth D. Alton
  • Patent number: 5335360
    Abstract: A base site circuit (38) for operating in a communication system (10) having a plurality of base sites capable of allocating a communication channel for use by a communication unit (16) in response to a communication channel request from the communication unit. The base site circuit includes a receiver (34) that operates in a low sensitivity mode when there are no communication channel requests received, and that operates in a high sensitivity mode which is activated by a control signal. The base site further includes a transmitter (34) which is activated by the control signal and a control circuit (32) coupled to both the receiver and the transmitter, for controlling the receiver and the transmitter. The control circuit (32) provides the control signal to the transmitter and to the receiver, in response to a communication channel request.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: August 2, 1994
    Assignee: Motorola, Inc.
    Inventors: Paul D. Marko, Stelios J. Patsiokas, Craig P. Wadin, Gary S. Lobel
  • Patent number: 5321737
    Abstract: A communication system, for providing services to a plurality of subscribers, comprises a network controller, a base station, and a wireless mobile subscriber unit. The network controller includes a memory for storing a plurality of memory templates. Each memory template contains information pertaining to a subscriber. A controller processes information in the memory templates. A transceiver transmits information from the memory templates to subscribers upon request by a subscriber and at times automatically determined by the network controller. A general services tank provides general services to the subscribers, and an individual services tank provides individual services to the subscribers. The base stations each include a radio transceiver that includes a memory, coupled to the radio transceiver, for storing a plurality of memory templates.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: June 14, 1994
    Assignee: Motorola, Inc.
    Inventor: Stelios J. Patsiokas
  • Patent number: 5285443
    Abstract: A method and apparatus are provided for synchronizing over-the-air time division duplexing communication within a defined geographical coverage area (201) of a communication system (200) that provides at least cordless radiotelephone operation between a plurality of portable radiotelephone transceivers and a plurality of telepoint base stations (202, 204, 206) geographically located within the coverage area (201). The communication system (200) transmits over-the-air a synchronization timing signal (203) including timing information corresponding to a transmit-and-receive duty cycle timing for time division duplexing communication. At least one telepoint base station (204, 206) within the coverage area (201) receives the synchronization timing signal (203). The at least one telepoint base station (204, 206) synchronizes its over-the-air time division duplexing communication transmit-and-receive duty cycle timing to the timing information.
    Type: Grant
    Filed: August 25, 1992
    Date of Patent: February 8, 1994
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Gary S. Lobel, Craig A. Lee
  • Patent number: 5280541
    Abstract: A method for re-establishing a communication link that has been lost between a portable unit (406) and a fixed unit or base station (402) provides for a way of quickly re-establishing the lost communication link, on the previously used RF channel. The method is begun by transmitting a link re-establishment code word (900) using MUX 1 after determining that synchronization has been lost (502) for a predetermined period of time (504). This is followed by automatically switching the portable unit (406) from MUX 1 to MUX 3 communication protocol. Followed by re-establishing communication (re-establish synchronization) between the portable (406) and base station (402) in MUX 3 and switching the two communication devices (402 and 406) back to MUX 1 after the communication link has been re-established. The same steps can be followed by base site (402) if it had been the first to detect loss of the communication link.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: January 18, 1994
    Assignee: Motorola, Inc.
    Inventors: Paul D. Marko, Stelios J. Patsiokas, Craig P. Wadin
  • Patent number: 5259021
    Abstract: A public telephone network to portable telephone interconnection device (20) is provided. At least one transceiver (30a-n) interconnects a plurality of portable telephones (12) to the public telephone network (16). A channel monitor (38) monitors the transceivers (30a-n and 82) to provide information. At least one information transceiver (82) interconnects the plurality of portable telephones (12) to and is responsive to the monitor (38) for transmitting (104) the information to the plurality of portable telephones (12).
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: November 2, 1993
    Assignee: Motorola, Inc.
    Inventors: Gary A. Antilla, Mark S. Stuglik, Felix W. Krupczynski, Stelios J. Patsiokas, Frank E. Lambrecht, Brian K. Johnson
  • Patent number: 5218630
    Abstract: A base station allocates radio channels to radio telephone handsets in a second generation cordless telephone (CT2) communication systems by scanning each channel in a first band, and scanning each channel in a second band to measure an RSS level for each channel scanned. The base station scans the second band at a rate that is substantially faster than the rate at which it scans the first band. If a link request is received on a first channel within the first band, from a calling radio telephone, the base station determines whether the first channel has an RSS level above a predetermined threshold. If the RSS level of the first channel is above the threshold, and the calling radio telephone handset is capable of operating on the second band, the base station re-assigns a second channel, that is within the second band, to the calling radio telephone handset.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: June 8, 1993
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Craig P. Wadin, Paul D. Marko
  • Patent number: 5203012
    Abstract: A method and apparatus for choosing the most optimum communication channel in a system (100) having a plurality of communication channels provides for reduced interference and increased system capacity. By establishing a set of threshold levels and comparing these threshold levels to receive signal strength level measurements for each of the communication channels, a communication device originating a call can be guaranteed of establishing communication using the communication channel with the least chance of being affected by interference or of affecting other channels already in use.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: April 13, 1993
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Paul D. Marko, Craig P. Wadin, Edward S. Kovach, Kenneth D. Alton
  • Patent number: 5109400
    Abstract: A radio communication system with on/off premise registration is provided. When a radio is registered with the system, incoming calls for the radio are directed to the radio via the system. When the radio is registered as off the system information is transmitted to the radio as via a wide area system. A voice mailbox is provided for storing messages when the radio is unavailable.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: April 28, 1992
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, William V. Braun
  • Patent number: 5107494
    Abstract: Subscribers participating in a call may communicate information un-impeded until the occurrence of an event (such as the expiration of a time interval). After detecting this event, the quality or intelligibility of the communicated information is repeatedly reduced to encourage the subscribers to voluntarily conclude the call.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: April 21, 1992
    Assignee: Motorola, Inc.
    Inventors: Brian K. A. Johnson, Stelios J. Patsiokas
  • Patent number: 5063588
    Abstract: The identity of a calling subscriber unit (106) is provided to a called subscriber unit(s) (106') by requiring the calling subscriber to identify itself (112) to a central station (102 and 104a-c) and request across to the communicaiton resources. The central station forwards the identity of the calling subscriber to the called subscriber (114), which enables the called subscriber to decide whether to respond to (answer) the call. If the called subscriber responds, an RF communication link between the two subscriber units is established. Conversely, if the called subscriber does not respond (or responds negatively), the calling subscriber unit is provided with a "Busy" indication. Optionally, the central station may operate as a system-wide message recorder to store messages from calling subscribers for non-responding (Busy) subscribers. In this way, a calling subscriber may leave a message for later retrieval.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: November 5, 1991
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Brian Keith A. Johnson, Pierre E. Audet
  • Patent number: 5020136
    Abstract: A combination battery pack and low profile antenna arrangement for use in conjunction with a two-way portable transceiver includes an enclosure containing an electrical battery with positive and negative electrodes. A pair of terminals are attached to the outer surface of the enclosure and are coupled to the positive and negative electrodes. A low profile antenna structure is disposed within the enclosure and includes a feed point for coupling RF energy to and from the antenna structure. An antenna coupling arrangement is electrically coupled to the feed point for coupling RF energy into and out of the enclosure.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: May 28, 1991
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Oscar M. Garay, Quirino Balzano
  • Patent number: 5001703
    Abstract: An improved duplex time division multiplexed (TDM) communication system is provided while conserving spectrum and efficiency. To accommodate two voice signals on one channel, the time allocated in a channel for brief listener voice acknowledgements is short; the time allocated for talker transmission is long. Moreover, the coding rate for the listener is slower than for the talker. The slot allocation can be switched whereby whoever is the dominant talker will maintain the longer slot.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: March 19, 1991
    Assignee: Motorola, Inc.
    Inventors: Brian K. A. Johnson, Stelios J. Patsiokas