Telefonaktiebolaget Lm Ericsson (publ)

Mikael Ziren

Muhammad Ali Kazmi

Bengt Lindoff

Yusheng Liu

Kumar Balachandran

Peter Alriksson

Johan Nilsson

Elias Jonsson

Jonas Ohlsson

David Sugirtharaj

Bo Magnus Bernhardsson

Stefania Sesia

Virgil Cimpu

Tatjana Hrnjez

A method of a network node for changing a first frequency of a first original cell, wherein one or more wireless communication devices are served by the original cell, and wherein the network node controls a plurality of other cells. The method comprises selecting one or more second frequency of an unlicensed spectrum that the network node should switch the original cell to, determining a second cell on the selected one or more second frequency as target cell and causing the target cell to maintain the same neighbor cell relations as the original cell. The method also comprises moving the one or more wireless communication devices from the original cell to the target cell, turning off the original cell when the one or more wireless communication devices have been moved from the original cell to the target cell and informing one or more neighboring network nodes of the frequency change to the one or more second frequency. Also disclosed is a computer program product, an arrangement and a network node.

Apparatus and method for cell frequency change procedure signal timing selection

A method of a network node of a time division duplex (TDD) system is disclosed. The method comprises acquiring a maximum cell synchronization error, determining a number of symbols of a partial uplink subframe (PUSF) based on the maximum cell synchronization error, and transmitting an indication of a PUSF configuration to at least one PUSF capable wireless communication device, wherein the PUSF configuration indicates the determined number of symbols of the PUSF. The method also comprises sending an uplink grant signal to one or more of the at least one PUSF capable wireless communication devices, wherein the uplink grant is for a PUSF immediately preceding another subframe to be used for downlink transmission. Transmitting the indication of the PUSF configuration may comprise broadcasting the indication or including the indication in the uplink grant signal. The method may further comprise receiving an indication of PUSF capability from the at least one PUSF capable wireless communication device, thereby identifying the at least one PUSF capable wireless communication device as PUSF capable. Corresponding computer program product, arrangement and network node are also disclosed.

Network node of a time division duplex system, and arrangement, method, and computer program therefor

An automatic frequency control (AFC) system in an electronic device is operated by using an AFC-algorithm component to determine a frequency error corresponding to a difference between a frequency of a signal output from a signal generator and a received signal frequency. The frequency error determined by the AFC-algorithm component is multiplied by a scaling factor, which is set to zero after an adjustment has been made to change a frequency of the signal output from the signal generator. The scaling factor is increased from zero to one over time. The scaled frequency error is used to determine whether to adjust the frequency of the signal output from the signal generator.

Electronic devices having automatic frequency control systems and methods and computer program products for operating the same

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Kavlinge, Sweden

Mikael Ziren