Abstract: Systems and methods related to Downlink-Uplink Decoupling (DUDe) in mixed licensed and unlicensed carrier wireless system are disclosed. In some embodiments, a method of operating a wireless device comprises communicating with a first radio node that operates on a licensed carrier to obtain a set of time resources in which the wireless device is expected to be scheduled for uplink data transmission on the licensed carrier and/or a set of time resources in which the wireless device is expected to receive downlink control transmission on the licensed carrier. The method further comprises communicating with a second radio node that operates on an unlicensed carrier to obtain, based on the set(s) of time resources for the licensed carrier, a set of time resources in which the wireless device will not be scheduled for downlink reception on the unlicensed carrier and receiving a downlink transmission from the second radio node accordingly.

Abstract: Data (161) and reference signals (162) are communicated with at least one device (112, 130-1, 130-2) on a radio link according to a first resource mapping (503). Switching, from the first resource mapping (503) to the second resource mapping, is executed and, in response to said switching, data (161) and reference signals (162) are communicated according to the second resource mapping. The first resource mapping (503) implements duplex communication (231, 232) of data (161) and of reference signals (162).

Abstract: Systems and methods are disclosed herein that relate to a mechanism at a radio access node(s) and a User Equipment (UE) that enable the UE to decide whether the UE can use a wireless channel for data transmission even when the UE senses the wireless channel as being busy during a listening phase of a Listen-Before-Talk (LBT) procedure. In some embodiments, the method of operation of the UE comprises performing a LBT procedure for an observed channel where a result of the LBT procedure being that the observed channel is busy and deciding to override the LBT procedure based on knowledge that the observed channel is busy due to transmission by a compatible UE and transmitting on the observed channel even though the result of the LBT procedure is that the observed channel is busy upon deciding to override the LBT procedure.

Abstract: The invention relates to a method for allocating an uplink reference signal to a user equipment, UE, located in a cell area comprising one or a plurality of cells served by one or a plurality of access nodes, comprising the steps of determining one or a plurality of active applications of the UE, determining a traffic characteristic associated to the one or the plurality of active applications, associating a priority level to the UE, wherein the priority level is based on the traffic characteristic, and allocating an uplink reference signal to the UE based determine traffic description on the priority level; the invention further relates to a corresponding access point and a computer program.

Abstract: A method and base station (800) for supporting Device-to-Device, D2D, communication over a D2D radio link between a first wireless device (D1) and a second wireless device (D2). The base station (800) obtains a first path gain (G12) of the D2D radio link, a second path gain (G1) of a cellular radio link between the base station (800) and the first wireless device (D1), and a third path gain (G2) of a cellular radio link between the base station (800) and the second wireless device (D2). The base station (800) then applies a D2D communication mode with network coding for the D2D communication when the first, second and third path gains (G12,G1,G2) satisfy a threshold condition.

Abstract: Embodiments herein relate to a user equipment and a radio network node, as well as to methods therein. The method in the radio network node relates to the control of resource allocation for D2D communications in a communications network. The network comprises the network node, a first user equipment, UE, and a second UE, wherein at least one of the first and second UEs is a first D2D capable UE. The method comprises configuring the second UE to transmit a reference signal; transmitting configuration information relating to the second UE to the first UE; receiving a measurement result of the measurement being performed by the first UE on the transmitted reference signal; and performing one or more radio operation task for a D2D communication between the first D2D capable UE and a second D2D communication capable UE based on the measurement result.

Abstract: Systems and methods related to Downlink-Uplink Decoupling (DUDe) in mixed licensed and unlicensed carrier wireless system are disclosed. In some embodiments, a method of operating a wireless device comprises communicating with a first radio node that operates on a licensed carrier to obtain a set of time resources in which the wireless device is expected to be scheduled for uplink data transmission on the licensed carrier and/or a set of time resources in which the wireless device is expected to receive downlink control transmission on the licensed carrier. The method further comprises communicating with a second radio node that operates on an unlicensed carrier to obtain, based on the set(s) of time resources for the licensed carrier, a set of time resources in which the wireless device will not be scheduled for downlink reception on the unlicensed carrier and receiving a downlink transmission from the second radio node accordingly.

Abstract: Systems and methods are disclosed herein that relate to the use of signals in a licensed spectrum to assist with determining a status of an unlicensed channel(s) in an unlicensed spectrum. In some embodiments, a method of operation of a wireless device in a wireless system in which the wireless device transmits and/or receives in both a licensed spectrum and an unlicensed spectrum comprises attempting to detect a busy indication transmitted in the licensed spectrum. The busy indication is an indication that another wireless device is transmitting in the unlicensed spectrum. The method further comprises determining whether to transmit in the unlicensed spectrum based on whether the wireless device has detected a busy indication transmitted in the licensed spectrum. By using signals in the licensed spectrum, the hidden node problem and/or the exposed node problem in the unlicensed spectrum can be mitigated.

Abstract: A methods, base station, wireless device and candidate relay device for supporting a D2D communication between a first wireless device and a second wireless device over a relay. The base station receives (302) from the first device an identity of a candidate relay wireless device and a first quality metric (Geq) pertaining to a first relay link between the first device and the candidate relay device and to a second relay link between the second device and the candidate relay device. The base station also obtains (304) a second quality metric (G12) pertaining to a D2D link between the first and second devices, and a third quality metric (G1 BS) pertaining to a cellular link between the base station and the first device. When the first quality metric (Geq) indicates a better link quality than both the second metric (G12) and the third metric (G1 BS), the base station selects (310) a relay mode for the D2D communication with the candidate relay device as the relay and instructs the involved devices accordingly.

Abstract: A method performed by a network node (110) for handling cellular communications and Device-to Device, D2D, communications of user equipments (121, 22, 123, 124) served by the network node (110) in a wireless telecommunications network (100) is provided. The network node determine, for at least one Physical Radio Resource, PRR, to be scheduled for both cellular and D2D communications of the user equipments (121, 122, 123, 124), a number of spatial streams to be used by the cellular and D2D communications of the user equipments (121, 122, 123, 124). The network node then transmits an indication of the number of spatial streams of said determined number of spatial streams to be used in D2D communication on the at least one PRR to at least one user equipment of at least one D2D pair of user equipments (123, 124) determined to be scheduled for D2D communication.

Abstract: A method is performed by a system of a wireless communication network, for detecting neighboring UEs of a first UE that is wirelessly connected to a first base station. The method comprises receiving power measurements performed on signals received at the first UE, which signals are sent from base stations, each received power measurement being associated with an ID of the base station from which the signal was sent, and receiving power measurements of signals received at a second UE that is wirelessly connected to a second base station, each power measurement being associated with an ID of the base station from which the signal was sent. The method further comprises determining a correlation between the received power measurements of the first and second UEs, and based on the determined correlation, determining whether the second UE is a neighbor to the first UE.

Abstract: The present disclosure relates to reference signalling in mobile communications, to transmitting and receiving uplink reference signals in a multi-carrier system by adapting the subcarrier frequency spacing of the reference elements used for transmitting the reference signal. The disclosure also relates to corresponding devices and a computer program for executing the proposed methods, and a carrier containing said computer program. The disclosure proposes a method, for use in a wireless device, for transmitting a reference signal. The method comprises receiving information indicating a frequency subcarrier spacing, determining a sequence of a reference signal based on the received information and transmitting the reference signal to a network node.

Abstract: A method, wireless device, and network node configured to enable a wireless device to serve as a base station to at least one other wireless device in a communications network, the wireless device being configured to perform predetermined base station functions. The method includes determining a condition triggering a need to provide the predetermined base station functions to the at least one other wireless device, notifying a network node in the communications network that the wireless device is available to provide the predetermined base station functions, receiving approval from the network node to provide the predetermined base station functions, and providing the predetermined base station functions to the at least one other wireless device.

Abstract: A radio frequency communication device (100, 320) comprising a radio frequency communications interface (130) and a controller (110), wherein said controller (110) is configured to: establish network communication with a network node (200, 310) and to establish device-to-device communication with a second radio frequency communication device (325) via said radio frequency communication interface (130).

Abstract: A method performed by a first User Equipment, UE, for enabling Device-to-Device, D2D, communication with a second UE in a radio communications network is provided. The first UE is configured to perform the D2D communication on downlink cellular resources in the radio communications network. The first UE measures received signal strengths of Reference Signals, RS, on downlink cellular resources from one or more network nodes in the radio communications network. The first UE then determines a first subset of downlink cellular resources for which the measured received signal strength of RS is above or equal to a threshold value. Also, the network node transmits information indicating the determined first subset of downlink cellular resources to a network node serving the first UE in the radio communications network in order to enable the D2D communication.

Abstract: A radio device (100) receives a radio transmission on a carrier frequency. While receiving the radio transmission, the radio device (100) transmits an indication that the carrier frequency is in use by the radio transmission to the radio device (100). This indication may then be used by a further radio device (10, 11) for controlling a radio transmission to the radio device (100), e.g., by deciding whether, when, or how to use the carrier frequency for this radio transmission.

Abstract: Embodiments herein relate to a user equipment and a radio network node, as well as to methods therein. The method in the radio network node relates to the control of resource allocation for device-to-device (D2D) communications in a communications network. The network comprises the network node, a first user equipment (UE), and a second UE, wherein at least one of the first and second UEs is a first D2D capable UE. The method comprises configuring the second UE to transmit a reference signal, transmitting configuration information relating to the second UE to the first UE, receiving a measurement result of the measurement performed by the first UE on the transmitted reference signal, and performing one or more radio operation task for a D2D communication between the first D2D capable UE and a second D2D communication capable UE based on the received measurement result.

Abstract: According to certain embodiments, a method in a first wireless device (10A) comprises determining (100) an intended pilot sequence that the first wireless device (10A) intends to send to an access node (20), determining (112-116) whether another wireless device (10B; 10N) is using a similar pilot sequence, and transmitting (122) the intended pilot sequence to the access node (20) in a next available time instance in response to a determination that another wireless device (10B, 10N) is not using the similar pilot sequence.

Abstract: Embodiments of the disclosure generally relate to determining cluster-heads for a cluster and operating strategy and methods of the cluster-heads. A device selects candidate cluster-heads from a cluster of devices. Next, the device determines a primary cluster-head for serving the cluster of devices from the candidate cluster-heads. Based on the determined primary cluster-head, the device determines a secondary cluster-head from the candidate cluster-heads. The secondary cluster-head serves the cluster of devices as a supplementary of the primary cluster-head.

Abstract: Embodiments herein relate to a method performed by a wireless device (10) for transmitting uplink reference signal to a radio network node in a wireless communication network. The wireless device (10) determines to beamform a transmission of an uplink reference signal for channel estimation when a condition is fulfilled. The wireless device (10) transmits the uplink reference signal to the radio network node (12) in a beamformed manner when the condition is fulfilled.