Abstract: Some of the example embodiments are directed towards a base station for determining a control timing configuration in order to provide a subframe timing setting for configuring downlink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network. The user equipment is served by a TDD based cell and a FDD based cell. Some example embodiments are directed towards user equipment for determining the control timing configuration as discussed above.

Abstract: Embodiments herein relate to a communication terminal (10) for handling communication, which communication terminal (10) is being served by a radio access node (12, 13) in a first cell (11) on a carrier of a licensed frequency spectrum and cross-carrier scheduled in a second cell (14) on a carrier of an unlicensed frequency spectrum by the radio access node (12, 13) via the first cell (11). The communication terminal receives an indication that data may be scheduled for the communication terminal (10) on a data channel in the second cell (14). The communication terminal attempts to detect presence of the data channel intended for the communication terminal (10). Then, in case the communication terminal (10) detects presence of the data channel intended for the communication terminal (10), the communication terminal (10) decodes the data channel.

Abstract: According to certain embodiments, a method by a wireless device for transmitting Hybrid Automatic Repeat Request (HARQ) feedback includes obtaining a Physical Uplink Control Channel (PUCCH) configuration parameter comprising a channel code type. Based on the PUCCH configuration parameter comprising the channel code type, a PUCCH format is selected for transmitting the HARQ feedback to a network node on the PUCCH, and the HARQ feedback is transmitted to the network node.

Abstract: A communication system includes a transmitting communication device and a receiving communication device. The transmitting communication device determines a control element, e.g., a control element of a Media Access Control protocol, associated with one of the carriers and provides the control element with an identifier specifying the carrier the control element is associated with. The transmitting communication device sends the control element with the identifier on one of the carriers to the receiving communication device. The receiving communication device receives the control element and determines, from the identifier received with the control element, the carrier the control element is associated with. Further, the receiving communication device determines, on the basis of parameters indicated by the control element, a data transmission property of the carrier the control element is associated with.

Abstract: There are provided mechanisms for monitoring search spaces. A first method performed by a wireless device comprises receiving an Orthogonal Frequency-Division Multiplexing (OFDM) symbol in a downlink slot. At least part of the OFDM symbol is included in a device-specific search space and in a common search space. The first method comprises monitoring the device-specific search space for at least one device-specific reference signal (RS) and monitoring the common search space for at least one non-device-specific RS. In a second method, a radio access network node transmits an OFDM symbol included in a device-specific search space and in a common search space. The device-specific search space contains a device-specific RS, or the non-device specific search space contains a non-device-specific RS, or both of these apply.

Abstract: Devices and methods for transmitting information in resource blocks between a base station and one or more communication devices are disclosed. In each resource block (RB) used for a data or control channel transmission, a plurality of non-overlapping regions of resource elements (REs) are defined. Each region is associated with one or multiple unique reference symbols (RSs), and may be further associated with one or more antenna ports. When user equipment (UE) demodulates the information it receives in a particular region of an RB, it uses the RS and/or antenna port associated with that region. The RS and/or antenna port information may be used, for example, to estimate a channel of the communication network or to demodulate and decode the data contained within the associated regions.

Abstract: A method for protecting an X-ray source including: a liquid jet generator configured to form a liquid jet moving along a flow axis; an electron source configured to provide an electron beam interacting with the liquid jet to generate X-ray radiation; the method including: generating the liquid jet: monitoring a quality measure indicating a performance of the liquid jet; identifying, based on the quality measure, a malperformance of the liquid jet; and if said malperformance is identified, causing the X-ray source to enter a safe mode for protecting the X ray source. Further, to corresponding devices.

Abstract: Systems and methods for determining and utilizing downlink Hybrid Automatic Repeat Request (HARQ) timing for reduced processing time are disclosed. In some embodiments, a method of operation of a wireless device in a cellular communications network comprises determining, based on a Time Division Duplexing (TDD) uplink/downlink configuration, a downlink HARQ timing value k for transmission of downlink HARQ feedback for a downlink transmission received in a downlink Transmission Time Interval (TTI) nDL. The method further comprises transmitting, in an uplink TTI nUL=nDL+k, the downlink HARQ feedback for the downlink transmission received in the downlink TTI nDL. For at least some combinations of values for nUL and TDD uplink/downlink configurations, k<4. In this manner, HARQ timing is provided for reduced processing time.

Abstract: Techniques are provided to ensure that a terminal device is able to perform measurements efficiently when an on/off scheme is used by network nodes, particularly in a heterogeneous network environment. An example method, implemented in a network node, comprises obtaining a discovery signal window pattern, the discovery signal window pattern defining one or more discovery signal windows during which each of a plurality of cells is to transmit a corresponding discovery signal, and sending an indication of the discovery signal window pattern to a terminal device.

Abstract: According to some embodiments, a method in a network node of a wireless network for aligning discovery reference signal (DRS) occurrences comprises determining a first DRS occurrence configuration that comprises a schedule for transmission of a first series of DRS occurrences. The method further comprises determining a first discovery measurement timing configuration (DMTC) that comprises a schedule for receiving DRS occurrences that is aligned with a first subset of DRS occurrences of the first series of DRS occurrences. The method further comprises determining a second DMTC that comprises a schedule for receiving DRS occurrences that is aligned with a second subset of DRS occurrences of the first series of DRS occurrences, wherein the second subset of DRS occurrences is different than the first subset of DRS occurrences. The method further comprises communicating first DMTC to a first wireless device and the second DMTC in a second wireless device.

Abstract: Some of the example embodiments are directed towards a base station for determining a control timing configuration in order to provide a subframe timing setting for configuring downlink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network. The user equipment is served by a TDD based cell and a FDD based cell. Some example embodiments are directed towards user equipment for determining the control timing configuration as discussed above.

Abstract: According to certain embodiments, a method is performed by a wireless device for transmitting Hybrid Automatic Repeat Request (HARQ) feedback to a base station via a Physical Uplink Control Channel (PUCCH). The method comprises determining that the wireless device has been assigned a first PUCCH resource for transmitting HARQ feedback. The first PUCCH resource is assigned from a plurality of PUCCH resources that are grouped into sets. The method further comprises changing from the first PUCCH resource to a second PUCCH resource. The second PUCCH resource belongs to the same set as the first PUCCH resource. The method continues with transmitting the HARQ feedback to the base station via the second PUCCH resource.

Abstract: There is disclosed a method for adapting HARQ buffers in a wireless device (90), said device is adapted for HARQ communication, the method comprising determining (10) a size of a HARQ buffer, the HARQ buffer size being based on a TTI. There is also disclosed a wireless device (90) adapted for HARQ communication, the wireless device comprising a processing circuitry and a memory, said memory containing instructions executable by said processing circuitry, whereby said wireless device is operative to determine a size of a HARQ buffer, the HARQ buffer size being based on a TTI.

Abstract: Embodiments herein relate to a communication terminal (10) for handling communication, which communication terminal (10) is being served by a radio access node (12, 13) in a first cell (11) on a carrier of a licensed frequency spectrum and cross-carrier scheduled in a second cell (14) on a carrier of an unlicensed frequency spectrum by the radio access node (12, 13) via the first cell (11). The communication terminal receives an indication that data may be scheduled for the communication terminal (10) on a data channel in the second cell (14). The communication terminal attempts to detect presence of the data channel intended for the communication terminal (10). Then, in case the communication terminal (10) detects presence of the data channel intended for the communication terminal (10), the communication terminal (10) decodes the data channel.

Abstract: Certain embodiments relate to a method for use in a wireless device. The method comprises distributing uplink power among parallel transmissions that the wireless device has scheduled during a subframe on two or more uplink physical channels. The parallel transmissions comprise one or more short transmission time interval, sTTI, transmissions, and the UL power is distributed according to at least one prioritization rule. According to one of the prioritization rules, sTTI transmissions comprising control information are prioritized over sTTI transmissions comprising data without any control information. According to another of the prioritization rules, transmissions with shorter transmission time intervals are prioritized over transmissions with longer transmission time intervals.

Abstract: Systems and methods are provided for allocation of acknowledgement resources. In an embodiment, a method of transmitting control information to a communication network may be implemented in a wireless device. The method may include being configured with at least two physical uplink control channel (PUCCH) opportunities, each of the at least two PUCCH opportunities identifying uplink resources to be used for transmitting control information to the communication network. The method may further include receiving an acknowledgement resource indication (ARI) indicating one of the configured at least two PUCCH opportunities to be used for transmitting control information associated with the DL transmission.

Abstract: A method is performed by a wireless device. The method comprises determining a first configured maximum transmit power value (P_cmax1) for transmitting in a first radio access technology (RAT). The P_cmax1 is determined based on one or more transmissions of the first RAT. The method further comprises determining a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT. The P_cmax2 is determined based on transmissions of both the first RAT and the second RAT. The method further comprises performing a transmission in the first RAT at a power less than or equal to the P_cmax1. The method further comprises performing a transmission in the second RAT at a power less than or equal to the P_cmax2.

Abstract: There is presented a method for providing configuration for downlink transmission to a wireless device. The method is performed by a network node and comprises transmitting a Downlink Control Information (DCI) message comprising configuration for downlink transmission in a short Transmission Time Interval (sTTI). Network nodes, wireless terminals, computer programs, and computer program products thereof are also presented.

Abstract: Techniques are provided to ensure that a terminal device is able to perform measurements efficiently when an on/off scheme is used by network nodes, particularly in a heterogeneous network environment. An example method, implemented in a network node, comprises obtaining a discovery signal window pattern, the discovery signal window pattern defining one or more discovery signal windows during which each of a plurality of cells is to transmit a corresponding discovery signal, and sending an indication of the discovery signal window pattern to a terminal device.

Abstract: Systems and methods are provided for allocation of acknowledgement resources. In an embodiment, a method of transmitting control information to a communication network may be implemented in a wireless device. The method may include being configured with at least two physical uplink control channel (PUCCH) opportunities, each of the at least two PUCCH opportunities identifying uplink resources to be used for transmitting control information to the communication network. The method may further include receiving an acknowledgement resource indication (ARI) indicating one of the configured at least two PUCCH opportunities to be used for transmitting control information associated with the DL transmission.