Abstract: Systems and methods are disclosed herein that relate to Dual Connectivity (DC) for a wireless device is a wireless communication network. In some embodiments, a method in a secondary node for providing, along with a master node, DC for a wireless device such that the wireless device is configured to utilize resources provided by both the master node and the secondary node in a wireless communication network is disclosed. The method comprises receiving, from the master node, a release request. The release request is a request to release a wireless device context of the wireless device or to release resources for the wireless device. The method further comprises sending a release reject to the master node. The release reject is an indication that the secondary node rejects the release request.

Abstract: The present disclosure relates to a radio receiver 10, 110, 120, 130, a radio transmitter 10, 110, 120, 130, a communication system 100, and methods thereof, and relates in particular to a method in a communication system 100 comprising at least a radio receiver 10, 110, 120, 130 and a radio transmitter 10, 110, 120, 130, the method comprising the steps of determining a derivative value of a metric; reporting the derivative value to the wireless communication system 100, and receiving a derivative value of a metric.

Abstract: A base station, in a wireless communications system, configures first resources for data access from devices to said base station, said first resources allowing a cyclic prefix having a first length; and configures second resources for data access from devices to said base station, said second resources allowing a cyclic prefix having a second length longer than the first length. The base station transmits configuration information regarding the configured resources to at least one device. The first resources allow at least data having a first useful data period and a cyclic prefix having the first length to be received in a first period having a first predetermined duration; and the second resources allow at least data having a second useful data period and a cyclic prefix having the second length to be received in a second period having the second predetermined duration, and the second predetermined duration is an integer multiple of the first predetermined duration.

Abstract: Certain embodiments disclose a method in a network node. The method broadcasts a location of a time and/or frequency resource of a first Physical Random Access Channel (PRACH). The first PRACH has a static location. The method determines a location of a time and/or frequency resource for a second PRACH. The location of the second PRACH is determined dynamically. The method communicates downlink control information to a wireless device. The downlink control information indicates the location of the second PRACH. The method receives a random access attempt from the wireless device. The random access attempt is received via the first PRACH or the second PRACH. The method communicates a random access response to the wireless device.

Abstract: A method for monitoring a radio link between a base station and a terminal in a wireless communication system includes adapting at least one parameter, which is used in monitoring the radio link, based on a duration of an inactive phase in which the terminal is not transmitting to and/or receiving data from the base station via the radio link.

Abstract: Systems and methods are disclosed herein that relate to Dual Connectivity (DC) for a wireless device is a wireless communication network. In some embodiments, a method in a secondary node for providing, along with a master node, DC for a wireless device such that the wireless device is configured to utilize resources provided by both the master node and the secondary node in a wireless communication network is disclosed. The method comprises receiving, from the master node, a release request. The release request is a request to release a wireless device context of the wireless device or to release resources for the wireless device. The method further comprises sending a release reject to the master node.

Abstract: Certain embodiments disclose a method in a wireless device. The wireless device receives a location of a time and/or frequency resource of a first Physical Random Access Channel (PRACH) from a network node. The wireless device receives a location of a time and/or frequency resource of a second PRACH. Furthermore, the wireless device transmits a first random access attempt via the first PRACH and transmits a second random access attempt via the second PRACH. The first PRACH and the second PRACH each have an associated preamble, and wherein the second PRACH preamble has a different length than the first PRACH preamble.

Abstract: A method performed in a wireless communications system for changing master node for a wireless device (WD). A first node is the master node for the WD, and second and third nodes are secondary nodes for the WD. The third node receives information that the third node is to be the master node and information to reuse a first set of existing protocol entities and context for communication with the WD. The WD receives information about a change of master node from the first node to the third node and information to reuse a second set of existing protocol entities and context for communication with the third node. The second node receives information that the third node is the master node and information to reuse a third set of existing protocol entities and context for communication with the WD. Thereby the master node for the WD is changed.

Abstract: The present disclosure relates to methods and devices for improved cell detection. In particular the disclosure relates to cell detection within a group of cells with high requirements of low latency. The disclosure also relates to corresponding computer program. The disclosure proposes a method, performed in a wireless device, for cell detection within a group of cells. The method comprises detecting a first synchronization signal of a first cell in the group, wherein the detecting comprises searching for any of a set of predefined synchronization signals. The method further comprises obtaining, based on the detected first synchronization signal, information defining a subset of the predefined synchronization signals, wherein the subset defines synchronization signals that are possible within the group of cells. The method also comprises decoding one or more further synchronization signals of cells in the group of cells using the obtained information.

Abstract: The present disclosure generally relates to the field of security context setup. More specifically, the present disclosure relates to techniques of supporting security context setup in a wireless communication network. A method embodiment relates to supporting security context setup in a wireless communication network, the method comprising initiating (S304), by a radio access network (RAN) element (200) of the wireless communication network, Access Stratum (AS) security context setup for a first Radio Access Technology (RAT) and a second RAT in a common signaling procedure.

Abstract: A method and a network node, for handling a feedback procedure requiring transmission of feedback messages on a reverse link to indicate either an ACK or a NACK of correct reception of data transmitted on a forward link in a radio communication with a wireless device. The network node obtains (300) a quality of the forward link and determines (302) an expected data error rate on the forward link based on the quality of the forward link. The network node then assigns (306) radio resources on the reverse link for transmission of the feedback messages based on the expected data error rate, so that more radio resources are assigned for the reverse link when the expected data error rate is relatively high than when the expected data error rate is relatively low. Thereby, the amount of radio resources on the reverse link can be adapted to the expected data error rate such that any waste of radio resources to no avail can be reduced.

Abstract: A method for retransmission of uplink transmissions, performed by a wireless device with configured uplink grants. The method comprises transmitting a first transmission to a network node with a redundancy version (RV). The wireless device then determines to retransmit the first transmission, and retransmits the first transmission with a retransmission RV based on the type of retransmission. For a non-adaptive retransmission, the retransmission RV value is the same as the RV of the first retransmission. For an adaptive retransmission, the retransmission RV is the RV value received in a retransmission grant.

Abstract: A method performed in a wireless communication network for handling access of a first radio capable device, to a wireless medium in the wireless communication network. The wireless communication network prioritizes the first radio capable device over a second radio capable device for accessing the wireless medium based on a respective type of the first radio capable device and the second radio capable device. The first radio capable device is of a first type with an energy harvesting capacity or an energy harvesting capacity with a battery capacity below or equal a threshold, and the second radio capable device is of a second type with a non-energy harvesting capacity or an energy harvesting capacity with a battery capacity above the threshold.

Abstract: According to certain embodiments, disclosed is a method in a master node (MN) for minimizing user plane interruption delay. The method includes transmitting a handover request message to a secondary node (SN), receiving a handover request acknowledge message from the SN, and transmitting a reconfiguration instruction to a wireless device operating in dual connectivity with the MN and the SN. The reconfiguration instruction may include a new configuration wherein the SN is a target SN and an indication of a trigger used to switch to the new configuration.

Abstract: The proposed technology generally relates to radio resource management in wireless communication systems, which operate based on directive beams for serving one or more wireless user devices (120). A basic idea is to process image information obtained from one or more image sensors (115) to predict a change in radio propagation characteristics between a network node (110) of the wireless communication system and a user device (120), and to control a mobility reference signal for at least one directive beam in the wireless communication system and/or configure measurements of the mobility reference signal and/or configure reporting and/or processing of measurement results from measurements of the mobility reference signal, based on the predicted change in radio propagation characteristics.

Abstract: A network node, a wireless device and methods therein, for decoding of contention based uplink transmissions of data in a cell served by the network node. The network node registers the wireless device for contention based uplink transmissions of data on a radio resource reserved for contention based uplink transmissions of data. e.g. when receiving a registration request sent from the wireless device, such that the wireless device is included in a set of wireless devices being registered for contention based uplink transmissions of data on the radio resource in the cell. The network node then performs blind decoding of uplink signals transmitted on the radio resource by considering the wireless devices in the set. In this way, the decoding is made more efficient by disregarding any other wireless devices in the cell which are not registered for contention based uplink transmissions of data on the radio resource in the cell.

Abstract: A base station, in a wireless communications system, configures first resources for data access from devices to said base station, said first resources allowing a cyclic prefix having a first length; and configures second resources for data access from devices to said base station, said second resources allowing a cyclic prefix having a second length longer than the first length. The base station transmits configuration information regarding the configured resources to at least one device. The first resources allow at least data having a first data period and a cyclic prefix having the first length to be received in a first period having a first predetermined duration; and the second resources allow at least data having a second data period and a cyclic prefix having the second length to be received in a second period having the second predetermined duration, and the second predetermined duration is an integer multiple of the first predetermined duration.

Abstract: A device operates in a cellular communications network by detecting a timing signal from a serving base station, obtaining timing information from at least one other base station, and setting a value for a transmission time offset based on the detected timing signals from the serving base station and the at least one other base station. The device then transmits signals to the serving base station using the set value for the transmission time offset. The device may obtain the timing information from at least one other base station by detecting a timing signal transmitted by the at least one other base station, and subtracting the timing difference between the detected timing signals from the serving base station and the one other base station from a predetermined baseline time offset.

Abstract: According to certain embodiments, a method in a wireless device (110) for performing mobility measurements includes detecting (402) a first mobility measurement signal component sent from a network node (100), the first mobility measurement signal comprising a group ID information. The method may further include determining (404) one or more of a beam ID range and a resource allocation range for a second mobility measurement signal component using the group ID information. And, the method may further include detecting (406) the second mobility measurement signal component using the one or more of the beam ID range and the resource allocation range.

Abstract: A network node (200), a wireless device (202) and methods therein, for decoding of contention based uplink transmissions of data in a cell served by the network node. The network node (200) registers the wireless device (202) for contention based uplink transmissions of data on a radio resource reserved for contention based uplink transmissions of data, e.g. when receiving a registration request sent from the wireless device, such that the wireless device (202) is included in a set (200a) of wireless devices being registered for contention based uplink transmissions of data on the radio resource in the cell. The network node (200) then performs blind decoding of uplink signals transmitted on the radio resource by considering the wireless devices in the set. In this way, the decoding is made more efficient by disregarding any other wireless devices in the cell which are not registered for contention based uplink transmissions of data on the radio resource in the cell.