Telefonaktiebolaget Lm Ericsson (publ)

Fredrik Jonsson

Klas Hedberg

Magnus Källmark

Stefan Johansson

Thomas Walldeen

Fredrik Sonnevi

A wireless communication system comprises a wireless node for communication with wireless devices camping on a first cell, the node including a local control unit controlling communication between the system and the wireless devices, the system further comprising a first signalling control unit and a second signalling control unit), both provided for handling signalling of a first group of cells at least including the first cell and each providing a different cell identity for this cell, wherein the first signalling control unit acts as a primary signalling control unit for the first group of cells and the second signalling control unit acts as a secondary signalling control unit for the first group of cells.

Signalling redundancy in a wireless communication system

A heat transfer arrangement for heat exchange between an inside of an electronic component housing and an ambient environment. The heat transfer arrangement comprises a refrigerant circuit with an evaporator a condenser and conduits (). A refrigerant is arranged to self-circulate in a refrigerant flow in the refrigerant circuit. A flow control device () comprises a movable member () adapted to control the refrigerant flow. The movable member () affects a through flow area of one of the conduits (). The movable member () is adapted to move in response to a pressure change inside the refrigerant circuit by being affected from a first side by a refrigerant pressure inside the refrigerant circuit and from a second side by a spring force such that the refrigerant flow is changed.

Heat transfer arrangement and electronic housing comprising a heat transfer arrangement

A heat transfer arrangement () comprises a refrigerant circuit (), which refrigerant circuit () comprises an evaporator () adapted to be arranged inside an electronic component housing (), a condenser () adapted to be arranged outside the electronic component housing (), a first conduit () and a second conduit (). A refrigerant is present in the refrigerant circuit () and in use is arranged to self-circulate by evaporating in the evaporator (), rising as a gas through the first conduit (), condensing in the condenser () and flowing through the second conduit () to the evaporator (). The heat transfer arrangement () further comprises a reservoir () for liquid refrigerant connected to the refrigerant circuit (). A control device associated with the reservoir () is operable such that liquid refrigerant is collected in the reservoir () from the refrigerant circuit () to reduce heat exchange from the inside of the electronic component housing () to the ambient environment and such that liquid refrigerant is introduced from the reservoir () to the refrigerant circuit to increase heat exchange from the inside of the electronic component housing () to ambient environment.

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Bro, Sweden

Fredrik Jonsson