Patents by Inventor Christian Roobol

Christian Roobol 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).

  • Method and apparatus for determining an optimum timeout under varying data rates in an RLC wireless system which uses a PDU counter
    Patent number: 6473399
    Abstract: A data communications unit determines both efficiently and accurately when one or more data units should be received under a variety of conditions. In particular, the present invention compensates for transmission delays and for varying transmission rates over the communications channel. During a communication between first and second communications nodes, the first node receives a sequence of data units transmitted from the second node. The first communications node determines that one or more of the transmitted data units was either not received at all or was erroneously received (i.e., corrupted). The first node then sends a request to the second node to retransmit the one or more data units not received or erroneously received. A retransmit timer is started when the retransmission request is sent.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: October 29, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mathias Johansson, Christian Roobol, Johan Larsson