Patents Assigned to Nokia Telecommunications Oyj
  • Mobility within a packet-switched telephony network
    Patent number: 7502339
    Abstract: According to an embodiment of the present invention, a system is provided that includes a cellular network, a Public Switched Telephone Network (PSTN) and a mobile IP-telephony network (MIPTN). Both the cellular network and the MIPTN include a Home Function and one or more visited Functions. MIPTN subscribers can roam within the MIPTN. Also, a Gateway Function interfaces the PSTN and the MIPTN to allow roaming between the cellular network and the MIPTN. The Gateway Function performs a dynamic mapping function between PSTN/cellular addresses (e.g., in E.164 format) and MIPTN addresses (e.g., IP addresses) to allow registration and call delivery for subscribers roaming between the cellular network and the MIPTN. A similar type of Gateway Function also allows Short Message Service (SMS) messages to be delivered over the MIPTN as well.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: March 10, 2009
    Assignee: Nokia Telecommunications Oyj
    Inventors: Juha Matti Pirkola, Heikki Juhani Einola, Marko Juhani Suoknuuti, Aki Petteri Mikkonen, Tero Koskivirta, Jukka-Pekka Saunamäki, Pekka Tapio Pessi
  • Short message service support over a packet-switched telephony network
    Patent number: 6611516
    Abstract: According to an embodiment of the present invention, a system is provided that includes a cellular network, a Public Switched Telephone Network (PSTN) and a mobile IP-telephony network (MIPTN). Both the cellular network and the MIPTN include a Home Function and one or more visited Functions. MIPTN subscribers can roam within the MIPTN. Also, a Gateway Function interfaces the PSTN and the MIPTN to allow roaming between the cellular network and the MIPTN. The Gateway Function performs a dynamic mapping function between PSTN/cellular addresses (e.g., in E.16440 format) and MIPTN addresses (e.g., IP addresses) to allow registration and call delivery for subscribers roaming between the cellular network and the MIPTN. A similar type of Gateway Function also allows Short Message Service (SMS) messages to be delivered over the MIPTN as well.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: August 26, 2003
    Assignee: Nokia Telecommunications Oyj
    Inventors: Juha Matti Pirkola, Heikki Juhani Einola, Jarmo Johannes Virtanen, Aki Petteri Mikkonen, Tero Koskivirta