Abstract: A method, network node and wireless device (WD) and apparatus for power control for multiple channels and power prioritization are disclosed. According to one aspect, a method in a network node includes determining a first WD-specific power limit for each cell c of a cell group that includes at least one primary cell, PCell, and up to N secondary cells, SCells, N being a non-negative integer. The method also includes transmitting an indication of the first WD-specific power limit.

Abstract: 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.

Abstract: A method is disclosed for controlling interference mitigation of a wireless communication device operating in a first system provided by a first wireless communication system operator. The first system uses a first frequency interval and a first UL/DL configuration. The method comprises detecting (310) presence of a second system provided by a second wireless communication system operator which is different than the first wireless communication system operator. The second system uses a second frequency interval, which is overlapping with, or neighboring to the first frequency interval. The method also comprises acquiring (320) a second UL/DL configuration used by the second system by detecting wireless control signaling from the second system, and monitoring (330) a received signal strength metric of the second system.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A communication network is informed of the availability of MIMO mode of communication of user equipment by receiving a transmitted (305) indicator of the availability of MIMO mode of communication of a user equipment via a feedback channel between the user equipment and a node of a communication network.

Abstract: A communication network is informed of the availability of MIMO mode of communication of user equipment by receiving a transmitted (305) indicator of the availability of MIMO mode of communication of a user equipment via a feedback channel between the user equipment and a node of a communication network.

Abstract: Methods and apparatus for estimating interference level in a receiver are dominated by the receiver's residual frequency error when the interference is low. The interference estimation method can be changed when the interference is low such that it compensates for the effects of residual frequency errors. A method of estimating an interference level includes the steps of detecting an interference level of the received signal; determining whether the detected interference level is low; and if the detected interference level is low, estimating the interference level by at least one of estimating in only a radial direction and de-rotating the received signal before estimating the interference level.

Abstract: Methods and apparatus are described for estimating a path-loss difference between uplink and downlink communications at a first node communicating with a second node in a communication system. A quantity of access request preambles transmitted by the first node to the second node before an acknowledgement from the second node of successful receipt of a preamble is received at the first node is determined. A difference between an uplink path-loss attributed to communications from the first node to the second node and a downlink path-loss attributed to communications to the first node from the second node is estimated based on the transmitted preamble quantity determination. Once the path-loss difference is estimated, the estimate can be used for many purposes, such as to determine a transmission power of the first node.

Abstract: 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.

Abstract: Methods and apparatus for estimating interference level in a receiver are dominated by the receiver's residual frequency error when the interference is low. The interference estimation method can be changed when the interference is low such that it compensates for the effects of residual frequency errors. A method of estimating an interference level includes the steps of detecting an interference level of the received signal; determining whether the detected interference level is low; and if the detected interference level is low, estimating the interference level by at least one of estimating in only a radial direction and de-rotating the received signal before estimating the interference level.

Abstract: Methods and apparatus are described for estimating a path-loss difference between uplink and downlink communications at a first node communicating with a second node in a communication system. A quantity of access request preambles transmitted by the first node to the second node before an acknowledgement from the second node of successful receipt of a preamble is received at the first node is determined. A difference between an uplink path-loss attributed to communications from the first node to the second node and a downlink path-loss attributed to communications to the first node from the second node is estimated based on the transmitted preamble quantity determination. Once the path-loss difference is estimated, the estimate can be used for many purposes, such as to determine a transmission power of the first node.

Abstract: 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.