Abstract: There is provided mechanisms for beamforming using an antenna array. A method is performed by a network node. The method comprises obtaining, from a wireless device, a precoding matrix indicator to be used for transmission to the wireless device. The method comprises selecting a codebook from a set of codebooks according to the received indicator, wherein the selected codebook defines the precoding matrix, and wherein the set of codebooks comprises codebooks defining variable beam widths and having same number of non-zero antenna weights for all beam widths. The method comprises precoding transmission of signals to the wireless device from the antenna array using the selected codebook.

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: The present disclosure relates to methods and apparatus for flexible, security context management during AMF changes. One aspect of the disclosure is a mechanism for achieving backward security during AMF changes. Instead of passing the current NAS key to the target AMF, the source AMF derives a new NAS key, provides the new NAS key to the target AMF, and sends a key change indication to the UE, either directly or through some other network node. The UE can then derive the new NAS key from the old NAS key. In some embodiments, the AMF may provide a key generation parameter to the UE to use in deriving the new NAS key. In other embodiments, the target AMF may change one or more security algorithms.

Abstract: Cloud computing is continuously growing as a business model for hosting information and communications technology applications. While the on-demand resource consumption and faster deployment time make this model appealing for the enterprise, other concerns arise regarding the quality of service offered by the cloud. The placement strategy of the virtual machines hosting the applications has a tremendous effect on the High Availability of the services provided by these applications hosted in the cloud. Systems and methods for scaling a virtualized application that take into consideration the interdependencies between the components of the applications and other constraints such as the communication delay tolerance and resource utilization are provided.

Abstract: There is provided a method for time synchronization of stations (STAs) in a wireless local area network. An access point (AP) transmits a request to at least two STAs for the at least two STAs to transmit a response to the AP, the request indicating which frequency sub-band each of the at least two STAs is to use for transmitting the response. Responses to the request are received from the at least two STAs, wherein each of the responses comprises orthogonal frequency-division multiple access (OFDMA) symbols. For each of the at least two STAs, a time delay is determined based on the responses. Then, control signalling is transmitted to the at least two STAs, the control signalling comprising time alignment commands for the at least two STAs, wherein each time alignment command is based on the time delay for one of the at least two STAs.

Abstract: A radio device (10) receives control information from a node (100) of the wireless communication network. The control information is used for controlling semi-persistent allocation of radio resources of an unlicensed frequency spectrum. Based on the control information, the radio device (10) controls at least one UL radio transmission on the radio resources of the unlicensed frequency spectrum.

Abstract: Systems and methods for scheduling mini-slot transmissions are provided. A wireless device can request to schedule a mini-slot transmission that overlaps with a previously scheduled transmission. The mini-slot transmission can be granted and permitted to puncture the previously scheduled transmission.

Abstract: A method and an attack detection function (200), for detection of a distributed attack in a wireless network (206) to which multiple wireless devices are connected via network nodes (210). It is checked whether characteristics of a traffic flow from each of a plurality of wireless devices (208) fulfil a predefined threshold condition related to abnormal traffic originating from the wireless devices, or not. When detecting that said characteristics of traffic flow fulfil the threshold condition, changes of the traffic flows from the wireless devices are identified, e.g. based on statistics on previous traffic originating from the wireless devices. It can then be determined whether the wireless devices are used in the distributed attack, based on said identified changes of the traffic flows.

Abstract: A method in a terminal device for transmission to at least a first network device and a second network device over bundled Transmission Time Intervals (TTIs). The method comprises determining that a first TTI for transmission to the first network device overlaps a second TTI for transmission to the second network device based on a first Timing Advance (TA) value associated with the first network device and a second TA value associated with the second network device; and blanking a portion of the first TTI, such that the rest of the first TTI does not overlap the second TTI.

Abstract: In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for formatting a payload for transmission of multi-mode speech/audio codec data. The method comprises deciding whether a header-less or a header-full payload format is used for transmission of a coded frame. The decision is based on a codec mode and a required functionality. The payload data is packetized with or without the payload header depending on the decision.

Abstract: There is provided mechanisms for configuring beamforming settings. A method is performed by a wireless radio transceiver device configured to communicate in directional beams. The method comprises obtaining a performance indication requiring configuration of the beamforming settings of the wireless radio transceiver device. The method comprises selecting a similarity measure objective based on what kind of performance indication was obtained. The method comprises determining, based on the similarity measure objective and results from a similarity measure procedure applied to pairs of received signals, an order in which to evaluate the directional beams when configuring the beamforming settings.

Abstract: A wireless communication device determines its class, and identifies a logical channel identifier (LCID) value that is associated with the determined class within a radio access node. The device then generates a radio resource control (RRC) message including the identified LCID value, and transmits the generated RRC message to the radio access node. Upon receiving the LCID value, the radio access node determines whether the received LCID value is associated with a non-standard class of wireless communication device, and in response to determining that the received LCID value is associated with the non-standard class of wireless communication device, identifying the wireless communication device as belonging to the non-standard class of wireless communication device, and transmitting information to the wireless communication device based on the non-standard class identification.

Abstract: A technique for determining signal quality of a radio access network, RAN, (502) comprising a plurality of transmission-reception points, TRxPs (504), is described. A method aspect of the technique comprises or initiates receiving a control message for determining the signal quality based on a measurement of a reference signal (516.21) from a second TRxP (504.4) at a radio resource. The control message is indicative of the radio resource for the reference signal relative to a synchronization signal (512.1) from a first TRxP (504.1; 504.2; 504.3) other than the second TRxP.

Abstract: A communication network allows an end user to dynamically select a user device among user devices associated with the user's subscription as the primary user device by defining a primary capability tag or attribute. Selection of a user device sets the primary capability tag of the selected user device, which is published towards an application server. The application server notifies all other user devices in the group of devices. If a previous user device in the group of user devices was set as the primary user device, then, in response to the notification, the previous user device performs a re-registration with the network removing the previous user device as the primary user device for the services associated with the user subscription. The selected user device also performs a re-registration/registration with the network so all incoming requests for services associated with the user subscription are sent to the selected user device.

Abstract: A system, methods, nodes and computer program for redistributing a registration of a UE (100) from a first MSC (320) to a second MSC (124) is provided. The first MSC (320) and the second MSCs (124) are members of a pool of MSCs (130). The UE (100) is registered in the first MSC (320) and is attached to the first MSC (320) via a packet control node (340, 440) such as MME or SGSN. The first MSC (320) receives an order from an O&M center to redistribute the registrations of UEs (100) in the pool. The first MSC (320) sends a redistribution order to the packet control node (340, 440). The packet control node (340, 440) triggers the UE (100) to perform a routing or tracking area update procedure and triggers a location area update procedure to the second MSC (124), causing the UE (100) to be registered to the second MSC (124).

Abstract: Embodiments of the present disclosure provide a method in a base station for coordinating resources in a wireless communications system with carrier aggregation in which a first group of terminal devices is served by a primary cell and one or more secondary cells under control of the base station. The method comprises obtaining information indicating arrival of a second group of terminal devices at coverage of the base station. A speed of any terminal device of the second group is higher than a speed of any terminal device of the first group. The method also comprises releasing resources on at least one secondary cell of the one or more secondary cells and allocating the released resources to the second group of terminal devices.

Abstract: The disclosure provides a method (90) performed in a network node (2) for handling simultaneous measurement signaling and data communication with a communications device (3). The method (90) comprises transmitting (91) data to the communication device (3) using a transmission mode corresponding to the communication device (3) using a first number of reception elements (123, 125); establishing (92) a need for the communication device (3) to perform measurements and a capability of the communication device (3) for receiving measurement signaling using a second number of reception elements (123, 125) while receiving data using a reduced number of reception elements (123, 125); sending (93), to the communication device (3), a request to initialize the measurements, the request comprising a measurement configuration; and transmitting (94) the data using a transmission mode corresponding to the communication device (3) using the reduced number of reception elements (123, 125) for the data.

Abstract: Method in a radio node for configuring a wireless device. The radio node and the wireless device operate in a wireless communications network. The radio node configures the wireless device with a plurality of Physical Uplink Control Channel, PUCCH, resource units. The plurality of PUCCH resource units is associated with a number of downlink, DL, aggregated carriers.

Abstract: A radio communication receiver and a method performed by the radio communication receiver for configuring a Notch filter of the radio communication receiver. The method comprises retrieving stored and previously determined filter coefficients from a set of filter coefficients, where the retrieved filter coefficients constitute a fraction of the total number of filter coefficients; and setting the rest of the filter coefficients to one. The method further comprises normalising the retrieved filter coefficients; and transforming the filter coefficients such that the Notch position ends up at the one or more frequencies to be filtered out.

Abstract: The solution presented herein discloses a method of reducing inter-symbol jitter caused while processing each of a plurality of OFDM symbols in a received signal. For each of the plurality of OFDM symbols, the method comprises receiving a plurality of radio samples produced by a sampling of an OFDM symbol at a reduced sampling rate, where the reduced sampling rate causes inter-symbol jitter between the plurality of OFDM symbols. The method further comprises determining a sample offset corresponding to a symbol number for the OFDM symbol, transforming the samples of the OFDM symbol into a plurality of frequency-domain resource elements, and determining a phase offset for each of the resource elements using the sample offset. The method then reduces the inter-symbol jitter by rotating each resource element using the corresponding phase offset to generate phase-rotated resource elements.