Nokia Corporation

Harri Hakulinen

Toni Paila

Miia Vainio

Rod Walsh

Heikki Kokkinen

Mika Grundström

Ville Aarni

Teemu Harju

Manish Varma

Javier Lafuente

Jaakko Teinila

Tommy Lindgren

Matti Vesterinen

Improved systems and methods for establishing peer-to-peer calls such as voice over IP calls and video over IP calls. In various embodiments of the invention, SMTP messages are exchanged between devices using a SMTP server, with the SMTP messages including IP address information. With this arrangement, the need for SIP service providers can be eliminated. In other embodiments of the present invention, SMS messages including IP address information are transmitted between devices during a GSM or other type of telephone call, enabling the call to 'migrate' to a VoIP or video over IP call.

Systems for providing peer-to-peer communications

A receiver (FIG.) receives IP session announcement signals from a terrestrial digital video broadcasting system. Each IP session announcement (RM) includes information concerning announcements on an immediately lower level as well as information identifying the quantity of announcement data, such as the number of announcement messages, and a timeout value. The quantity data tells the receiver how many messages Xto Xit needs to receive (C) before it has received all the relevant announcement messages. The timeout value informs the receiver how long it can wait before again receiving the messages Xto X(which may have changed in content by then). After initially receiving the messages Xto X, the receiver may sleep (E), or it may receive announcement messages from another channel Y (D).

Announcing information service through broadcasting or multicasting

A receiver (FIG.), receives IP session announcement signals from a terrestrial digital video broadcasting system. Each IP session announcement (RM) includes information concerning announcements on an immediately lower level as well as information identifying the quantity of announcement data, such as the number of announcement messages, and a timeout value. The quantity data tells the receiver how many messages Xto Xit needs to receive (C) before it has received all the relevant announcement messages. The timeout value informs the receiver how long it can wait before again receiving the messages Xto X(which may have changed in content by then). After initially receiving the messages Xto Xthe receiver may sleep (E), or it may receive announcement messages from another channel Y (D).

A method for increasing a user's perceived access speed to content available from a data network. The method utilizes a multicast channel and the selection of group data to be sent over that channel.

Method to improve perceived access speed to data network content using a multicast channel and local cache

Growing community of inventors

Pirkkala, Finland

Harri Hakulinen