Patents by Inventor Gustavo Serena

Gustavo Serena 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).

  • Systems and methods for controlling audible speech distortion in a GPS-based CDMA wireless network using ATM transport
    Patent number: 6898212
    Abstract: A Base Station Controller (BSC) that reduces the occurrence of audible noise in a Code Division Multiple Access (CDMA) radio network is provided. The BSC according to one embodiment of the present invention comprises a Media Stream Board (MSB) for compressing groups of 160 PCM speech samples from a Public Switch Telephone Network (PSTN) into vocoded frames, and a Special Purpose Board (SPB) for reformatting the vocoded frames from the MSB into over-the-air CDMA vocoded frames. The MSB and SPB each have a local timer that is slave to “PSTN time”. The BSC further comprises a Timing Unit Board (TUB) connected to a GPS receiver. The TUB receives “GPS time” from the GPS receiver. The TUB generates timing cells, each containing time-of-day information according to “GPS time”. The TUB distributes the timing cells to the MSB and the SPB over an Asynchronous Transfer Mode (ATM) network. The MSB and SPB use the received timing cells to compare their local timer, which tracks “PSTN time”, to “GPS time”.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: May 24, 2005
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Dexter Chun, Manoj Deshpande, Steve Hicks, Bob Knight, KC Lee, Ravi Palakodety, Ramesh Ramaswamy, Gustavo Serena, Dave Walker, Jun Zhang