Patents by Inventor Lorenzo Casaccia

Lorenzo Casaccia 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: 20070060167
    Abstract: A control scheme using packet headers allows GSM EDGE Radio Access Network (GERAN) systems to increase spectral efficiency through multiplexing techniques, such as superposition coding, multi-user packet transmission, joint detection, and/or joint decoding. A fast feedback scheme for GERAN allows Voice over Internet Protocol (VoIP) frames to be transmitted over GERAN air interfaces without excessive feedback latency. As a result, Hybrid Automatic Repeat-reQuest (H-ARQ) acknowledgements may be timely provided for end-to-end VoIP calls that traverse GERAN air interfaces. Additionally, Incremental Redundancy H-ARQ and link quality feedback latencies are decreased.
    Type: Application
    Filed: July 19, 2006
    Publication date: March 15, 2007
    Inventors: Aleksandar Damnjanovic, Lorenzo Casaccia, Niels Andersen
  • Publication number: 20070014265
    Abstract: A method and apparatus resolves conflicts and ambiguities of GSM standards arising in DTM by monitoring only selected downlink timeslots for uplink status flags (USFs). Downlink timeslots with a packet data channel (PDCH) are monitored for a USF from a lowest numbered time slot, B(0), to a maximum time slot B(MAX) where B(MAX) is equal to the lowest transmission uplink timeslot, B(x), in the corresponding TDMA uplink frame if the second lowest transmission uplink timeslot B(x)+1, is a circuit switched timeslot and where B(MAX) is equal to the second lowest transmission timeslot in the corresponding TDMA frame, B(x)+1, otherwise.
    Type: Application
    Filed: March 9, 2006
    Publication date: January 18, 2007
    Inventor: Lorenzo Casaccia
  • Publication number: 20070002823
    Abstract: Techniques for transmitting data and training sequence efficiently using new slot and block formats are described. A transmitter processes (e.g., encodes, interleaves, and partitions) a data block to obtain multiple output blocks. For each output block, the transmitter generates multiple bursts having a training sequence that is shared by these bursts. The transmitter sends the multiple bursts for each output block in multiple time slots, e.g., consecutive time slots in one frame. The multiple bursts for each output block may (1) include one or more short training sequences, (2) omit guard periods between adjacent bursts, (3) include a first tail bit field at the start of the first burst and a second tail bit field at the end of the last burst, (4) include at least one stealing flag field, or (5) have any combination of the above.
    Type: Application
    Filed: May 8, 2006
    Publication date: January 4, 2007
    Inventors: Niels Skov Andersen, Lorenzo Casaccia
  • Patent number: 7158625
    Abstract: Systems and techniques for automatically terminating a call in a communications system involve a first subscriber unit originating a call to a second subscriber unit and terminating the call when the second subscriber unit rings.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: January 2, 2007
    Assignee: Qualcomm Incorporated
    Inventor: Lorenzo Casaccia
  • Publication number: 20060280142
    Abstract: A Global System for Mobile Communications (GSM) network supports multi-carrier operation on the downlink and/or uplink for a mobile station. The mobile station receives an assignment of multiple carriers for a first link in the GSM network, receives an assignment of at least one carrier for a second link in the GSM network, and exchanges data with the GSM network via the multiple carriers for the first link and the at least one carrier for the second link. The first link may be the downlink and the second link may be the uplink, or vice versa. The mobile station may receive data on multiple carriers at the same time for multi-carrier operation on the downlink. The mobile station may transmit data on multiple carriers at the same time for multi-carrier operation on the uplink.
    Type: Application
    Filed: May 16, 2006
    Publication date: December 14, 2006
    Inventors: Aleksandar Damnjanovic, Lorenzo Casaccia
  • Patent number: 7142565
    Abstract: A system and various methods and apparatus for efficient communications of data across various protocol layers are disclosed. A control system (210, 401) segments each message of a plurality of messages into a plurality of segments. A segment identification (805) is incorporated in each segment (804) identifying each segment as one of a start segment, a middle segment and an end segment of each message. Moreover, a sequence number (806) is incorporated in each segment of the plurality of messages in a stream of messages (801). The stream of messages (801) may include control messages (802) and short message service messages (803). The plurality of segments is transmitted by a transmitter (300) in an order of the sequence number (806) from a source to a destination.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: November 28, 2006
    Assignee: Qualcomm, Incorporated
    Inventors: Lorenzo Casaccia, Lijun Zhao
  • Publication number: 20060229072
    Abstract: A base station in a wireless communications network counts mobile stations receiving broadcast content via multi-user channel. The base station broadcasts a repeating message identifying at least one broadcast content stream and, for each stream, a REGISTER (R) or DO NOT REGISTER (DNR) indicator. Mobile stations periodically re-examine contents of this message. When the indicator is R for a broadcast content stream, mobile stations whose users have elected to receive it send the base station a registration message for that stream. When the number of registered mobile stations reaches a prescribed number, the base station changes the indicator to DNR. When the indicator is DNR for a broadcast content stream, mobile stations refrain from sending any registration message for that broadcast content stream. The base station may institute a recount by resetting the indicator to R.
    Type: Application
    Filed: June 9, 2006
    Publication date: October 12, 2006
    Inventors: Francesco Grilli, Lorenzo Casaccia
  • Publication number: 20060221894
    Abstract: A method and apparatus manages resources in a wireless communication system by transmitting a multi-carrier switch command message to an access terminal instructing the access terminal to switch between a diversity mode where each antenna module of a plurality antenna modules receives a single carrier signal transmitted at a single carrier frequency and a multi-carrier mode where a first antenna module of the plurality antenna modules receives a first multi-carrier signal transmitted at a first carrier frequency and a second antenna module receives a second multi-carrier signals transmitted at a second carrier frequency.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 5, 2006
    Inventors: Lorenzo Casaccia, Durga Malladi
  • Publication number: 20060203924
    Abstract: Methods and apparatus are disclosed herein for providing incremental redundancy in a wireless communication system to aid in error recovery. One or more redundancy versions are sent on different carriers than the primary version of information to be transmitted. At the receiver end the redundancy versions may be combined using hard or soft combining techniques, including selection combining, selective soft combining or soft combining.
    Type: Application
    Filed: September 28, 2005
    Publication date: September 14, 2006
    Inventors: Lorenzo Casaccia, Durga Malladi
  • Publication number: 20060166667
    Abstract: A base station (110) in a wireless communications network (100) counts mobile stations (114) receiving broadcast content via multi-user channel. The base station broadcasts (608) a repeating message identifying at least one broadcast content stream and, for each stream, a REGISTER (R) or DO NOT REGISTER (DNR) indicator. Mobile stations periodically re-examine (722) contents of this message. When the indicator is R for a broadcast content stream, mobile stations whose users have elected to receive it send (714) the base station a registration message for that stream. When the number of registered mobile stations reaches (612) a prescribed number, the base station changes (614) the indicator to DNR. When the indicator is DNR for a broadcast content stream, mobile stations refrain (712/716) from sending any registration message for that broadcast content stream. The base station may institute a recount (618) by resetting the indicator to R.
    Type: Application
    Filed: March 22, 2006
    Publication date: July 27, 2006
    Inventors: Francesco Grilli, Lorenzo Casaccia
  • Patent number: 7079492
    Abstract: In a system, method, and apparatus according to an embodiment of the invention, traffic on a basic access channel and a reserved access channel is managed to maximize use of the basic access channel while minimizing delays.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: July 18, 2006
    Assignee: Qualcomm, Incorporated
    Inventor: Lorenzo Casaccia
  • Patent number: 7062272
    Abstract: A base station (110) in a wireless communications network (100) counts mobile stations (114) receiving broadcast content via multi-user channel. The base station broadcasts (608) a repeating message identifying at least one broadcast content stream and, for each stream, a REGISTER (R) or DO NOT REGISTER (DNR) indicator. Mobile stations periodically re-examine (722) contents of this message. When the indicator is R for a broadcast content stream, mobile stations whose users have elected to receive it send (714) the base station a registration message for that stream. When the number of registered mobile stations reaches (612) a prescribed number, the base station changes (614) the indicator to DNR. When the indicator is DNR for a broadcast content stream, mobile stations refrain (712/716) from sending any registration message for that broadcast content stream. The base station may institute a recount (618) by resetting the indicator to R.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: June 13, 2006
    Assignee: Qualcomm Incorporated
    Inventors: Francesco Grilli, Lorenzo Casaccia
  • Publication number: 20060072567
    Abstract: A remote station for a wireless communication system including a base station is disclosed. The remote station includes a front end structure configured to receive packet data in parallel on a subset of carrier frequencies. Each packet data is preceded by a header field for identifying the remote station as the recipient of the packet data and the subset of carrier frequencies is based on a set of a corresponding number of multiple carrier frequencies.
    Type: Application
    Filed: September 14, 2005
    Publication date: April 6, 2006
    Inventors: Lorenzo Casaccia, Durga Malladi
  • Publication number: 20050260998
    Abstract: An apparatus for providing a Time Division Multiplexing (TDM) scheme for link adaptation including use of channel estimation and Channel Quality Indicator (CQI) measurements by bundling several timeslots of a frame within the existing GSM/GPRS/EDGE system. An algorithm for providing rotation of MS users such that each one will benefit from measuring all timeslots of the frame resulting in more reliable and accurate transmission of information.
    Type: Application
    Filed: May 19, 2004
    Publication date: November 24, 2005
    Inventors: Lorenzo Casaccia, Durga Malladi, Francesco Grilli
  • Publication number: 20050193309
    Abstract: Transmission techniques are provided that improve service continuity and reduce interruptions in delivery of content that can be caused by transitions that occur when the User Equipment (UE) moves from one cell to the other, or when the delivery of content changes from a Point-to-Point (PTP) connection to a Point-to-Multipoint (PTM) connection in the same serving cell, and vice-versa. Such transmission techniques enable seamless delivery of content across cell borders and/or between different transmission schemes such as Point-to-Multipoint (PTM) and Point-to-Point (PTP). Mechanisms for adjusting different streams and for recovering content from each data block during such transitions are also provided so that data is not lost during a transition. In addition, mechanisms for realigning data during decoding at a receiving terminal are also provided.
    Type: Application
    Filed: August 19, 2004
    Publication date: September 1, 2005
    Inventors: Francesco Grilli, Alkinoos Vayanos, Lorenzo Casaccia
  • Publication number: 20050169205
    Abstract: Transmission techniques are provided that improve service continuity and reduce interruptions in delivery of content that can be caused by transitions that occur when the User Equipment (UE) moves from one cell to the other, or when the delivery of content changes from a Point-to-Point (PTP) connection to a Point-to-Multipoint (PTM) connection in the same serving cell, and vice-versa. Such transmission techniques enable seamless delivery of content across cell borders and/or between different transmission schemes such as Point-to-Multipoint (PTM) and Point-to-Point (PTP). Mechanisms for adjusting different streams and for recovering content from each data block during such transitions are also provided so that data is not lost during a transition. In addition, mechanisms for realigning data during decoding at a receiving terminal are also provided.
    Type: Application
    Filed: August 19, 2004
    Publication date: August 4, 2005
    Inventors: Francesco Grilli, Alkinoos Vayanos, Lorenzo Casaccia
  • Publication number: 20050129058
    Abstract: Feedback from user stations to the base station for a multicast/broadcast transmission is performed by decoding multicast/broadcast data received from a transmitter on a downlink resource, forming a feedback message corresponding to the reception of the multicast/broadcast data, and queuing the feedback message for transmission to the transmitter on an uplink resource. The uplink resource used corresponds to the downlink resource used for the multicast/broadcast transmission. For unicast transmissions the uplink resource is dedicated to an uplink transmission corresponding to a downlink transmission on the downlink resource.
    Type: Application
    Filed: October 6, 2004
    Publication date: June 16, 2005
    Inventors: Lorenzo Casaccia, Francesco Grilli
  • Publication number: 20050129018
    Abstract: Methods and apparatus are described for broadcasting content. Encoding the content to be multicast/broadcast into multiple streams, wherein at least one stream provides a base portion of the content, and additional streams provide enhancements to the content. A wireless communication device receives the broadcast and decodes streams in accordance with the reception capabilities of the wireless device. The configuration of the wireless device can be determined based on the wireless device's capability to decode multiple streams. In addition, the configuration of the wireless device can be determined based on a subscriber level of the wireless device.
    Type: Application
    Filed: July 23, 2004
    Publication date: June 16, 2005
    Inventors: Lorenzo Casaccia, Francesco Grilli
  • Publication number: 20050089004
    Abstract: Method for segmented message transmission wherein each message is first divided into segments and the segments are fragmented. A segment parameter is applied to each segment, and a segment identifier to each fragment. The fragments are provided to a lower level for preparation into frames for transmission. One embodiment is applied to the transmission of short duration messages, such as control messages. A timer is used to detect an erasure within a plurality of transmission frames, wherein the timer uses an average inter-arrival time period between transmitted frames to determine a missing frame. In one embodiment, the time period is given as ?*AIT, wherein a is a constant value, and AIT is the average inter-arrival time of frames.
    Type: Application
    Filed: August 13, 2004
    Publication date: April 28, 2005
    Inventors: Lorenzo Casaccia, Ragulan Sinnarajah
  • Publication number: 20050008159
    Abstract: A method and an apparatus for secure registration for a multicast-broadcast-multimedia system (MBMS) are disclosed. A random number is generated by a broadcast-multicast-service center (BM-SC) and broadcast to user equipment in the coverage area of a radio access network (RAN). A memory module or smart card (UICC) in the user equipment generates a radio access network key (RAK) which is a function of the random number and a key selected from the group consisting of a public land mobile network key (PK) and a broadcast access key (BAK), and then generates a temporary registration key (RGK) as a function of the RAK, a service identification number and a user identification number, for example, P-TMSI, which may be extracted by the RAN to authenticate the registration as legitimate.
    Type: Application
    Filed: July 7, 2003
    Publication date: January 13, 2005
    Inventors: Francesco Grilli, Lorenzo Casaccia, James Semple, Parag Agashe