Seven Networks, LLC

Seven Networks International Oy

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Jukka Ahonen

Ari Backholm

Lauri Vuornos

Seppo Salorinne

Andrew J Everitt

Mikko Daavittila

Mikko Tervahauta

Marcus Groeber

Heikki Ylinen

Allan McLeod

Fabian Kuech

Oliver Thiergart

Fabian Küch

Petri Salmi

Rauli Ikonen

Marko Ketonen

Antti Saarlilahti

Giovanni Del Galdo

Ville Topias Pulkki

Antti Saarilahti

A method for IP [=Internet Protocol] communication between a mobile terminal and its correspondent node in a mobile radio network. The method comprises establishing an IP connection between the mobile terminal and its correspondent node. After detecting a period of inactivity in the IP connection, keep-alive messages are sent via the IP connection at predetermined intervals, which are varied. The method comprises monitoring the lengths of several periods of inactivity at which the mobile radio network disconnects the IP connection.

Dynamic adjustment of keep-alive messages for efficient battery usage in a mobile network

An apparatus adapted to operate as an A party in a database synchronization with a B party via a mobile communication network. The database contains data items to be synchronized. The apparatus includes mechanisms for maintaining a copy of the database and a client-server communication module with a client part and a server part. The client part is configured to communicate via the mobile communication network with the server part of the B party. The apparatus also includes change detection mechanisms responsive to a detection of a changed data item, for initiating a synchronization event via the client part of the client-server communication module.

Database synchronization via a mobile network

Systems and methods for maintaining an IP (Internet protocol) connection in a mobile network are disclosed. Techniques are disclosed wherein an optimal keep-alive interval is determined, and dynamic adjustments of keep-alive message interval are employed to prevent detection and counter measure. Keep-Alive schedule information may be determined at a first mobile terminal for a network, and subsequently used for a second mobile terminal when the second mobile terminal encounters that same network. In some embodiments, the Keep-Alive schedule information is stored at a network-node device. In some embodiments, the first mobile terminal and the second mobile terminal are cellular phones.

A method for IP [=Internet Protocol] communication between a mobile terminal and its correspondent node in a mobile radio network. The method comprises establishing an IP connection between the mobile terminal and its correspondent node. After detecting a period of inactivity in the IP connection, keep-alive messages are sent via the IP connection at predetermined intervals, which are varied. The method comprises monitoring the lengths of several periods of inactivity at which the mobile radio network disconnects the IP connection. Based on the monitored lengths of periods of inactivity, a maximum interval (T) between keep-alive messages is determined such that the maximum interval meets a predetermined criterion of statistical confidence, and the interval between keep-alive messages is set to the maximum interval (T).

An apparatus for deriving a directional information from a plurality of microphone signals or from a plurality of components of a microphone signal, wherein different effective microphone look directions are associated with the microphone signals or components, has a combiner configured to obtain a magnitude value from a microphone signal or a component of the microphone signal. The combiner is further configured to combine direction information items describing the effective microphone look directions, such that a direction information item describing a given effective microphone look direction is weighted in dependence on the magnitude value of the microphone signal, or of the component of the microphone signal, associated with the given effective microphone look direction, to derive the directional information.

Apparatus and method for deriving a directional information and computer program product

Methods and systems for maintaining mobile terminal information for secure email communications are provided. Information concerning multiple mobile terminals are maintained. Such information may include encryption information and an identifier for each mobile terminal. A service activation code that includes encryption information and an identifier from an authenticated user of the mobile terminal is received. The encryption information may be provided to a connectivity function for use in establishing an encrypted data channel. The established encrypted data channel may then be used to convey e-mail communications to and from the mobile terminal.

Maintaining mobile terminal information for secure communications

A method for IP communication between a mobile terminal and its correspondent node in a mobile radio network. The method comprises establishing () an IP connection between the mobile terminal and its correspondent node. After detecting a period of inactivity in the IP connection, () keep-alive messages are sent via the IP connection at predetermined intervals, which are varied. The method comprises monitoring () the lengths of several periods of inactivity at which the mobile radio network disconnects the IP connection. Based on the monitored lengths of periods of inactivity, a maximum interval (T) between keep-alive messages is determined () such that the maximum interval meets a predetermined criterion of statistical confidence, and the interval between keep-alive messages is set () to the maximum interval (T).

Maintaining an IP connection in a mobile network

Systems and methods for dynamic adjustment of keep-alive message intervals in a mobile network are disclosed. One embodiment of maintaining an IP connection between a mobile terminal and a network node over a network includes, detecting a rate with which the client-slide request are made from the mobile terminal, detecting a rate with which the client-slide request are made from the mobile terminal, sending, by the network node, keep-alive messages to the mobile terminal in an absence of network traffic through the IP connection between the mobile terminal and the network node, and/or further optimizing the time intervals between the keep-alive messages based on a cost to send the keep-alive messages in the network.

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Espoo, Finland

Jukka Ahonen