Patents by Inventor Per Erik Filip Sydhoff

Per Erik Filip Sydhoff 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).

  • Asynchronous transfer mode system handling differing AAL protocols
    Patent number: 6804246
    Abstract: A communications network (40) has ATM cells with AAL2 protocol packets carried on a first interface (54) between two nodes (42, 44) of the network. Using the AAL2 protocol packets, many user channels are multiplexed onto one ATM VC between the two nodes. In one of the two nodes designated as a control node (44), user channels are terminated by mapping AAL2 packets of the user channels into modified ATM cells having a AAL protocol different than AAL2. The AAL protocol utilized for the modified ATM cells, termed AAL2 prime, requires that AAL2 packets carried in the ATM cell payload be whole packets and that the ATM payload not have an AAL2-type start field. Preferably, in the AAL2 prime protocol only one whole AAL2 packet is carried per ATM cell payload. Termination of the AAL2 user channels at the control node preferably occurs at a pooled and centralized resource termed a cell handling unit (32).
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: October 12, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Lars-Göran Petersen, Staffan Andersson, Per Erik Filip Sydhoff, Peter Carl Birger Lundh