Abstract: An access point (AP) uses a communication channel resource to communicate with first wireless communication devices using orthogonal frequency division multiple access (OFDMA) and with second wireless communication devices using carrier sense multiple access with collision avoidance (CSMA/CA). The AP alternates between OFDMA communication and CSMA/CA communication, and—during OFDMA communication—alternating between uplink and downlink communication. Each time period between an end of uplink communication and a start of downlink communication has a duration that is smaller than a time period threshold, and each time period between an end of downlink communication and a start of uplink communication has a duration that is smaller than the time period threshold. The time period threshold is smaller than or equal to a minimum time period required for any of the second wireless communication devices to acquire access to communication with the AP using CSMA/CA.

Abstract: There is provided access to a communications channel in a wireless communications network. Stations (STAs) associated with an access point (AP) are grouped in at least two groups of STAs, each group being associated with a minimum transmission power level needed by the AP to communicate with the STAs in that group. A first time interval is allocated for a first group of STAs associated with highest minimum transmission power to access the communications channel concurrently with a third time interval being allocated by another AP for a third group of STAs associated with lowest minimum transmission power level needed by said another AP to communicate with the third group of STAs to access the communications channel.

Abstract: There is provided mechanisms for frequency selective scheduling of wireless devices in a communication network. A method is performed by a wireless network node. The method comprises transmitting a first packet to at least one wireless device over the entire available bandwidth of the communication network, wherein the first packet comprises information identifying which wireless devices are addressed by the packet, and which downlink sub-carriers are used for data transmission to the addressed wireless devices. The method comprises receiving a second packet on uplink sub-carriers allocated to at least the addressed wireless devices and therefrom determining channel quality indications for the uplink sub-carriers. The uplink sub-carriers are allocated to enable the channel quality indications to be determined over the entire bandwidth for at least each one of the addressed wireless devices.

Abstract: A device for suspension of a suspended ceiling, comprising an elongated suspension member (3) having a first end (10) and an opposing second end (11), an anchoring head (4) being arranged at the first end (10); a housing (2) having an open top side (5) and an opposed, closed bottom side (6), the (2) housing defining a housing cavity (7) adapted to be filled with an adhesive (16); and a suspension member holder (8). A passage (9) is provided extending through the closed bottom side (6) of the housing (2), wherein the elongated suspension member (3) in an assembled state of the device extends through the passage (9) with the first end (10) positioned inside the housing cavity (7) and the second end (11) positioned outside the housing cavity (7) and wherein the suspension member holder (8) in the assembled state of the device positions the first end (10) and the thereto arranged anchoring head (4) of the suspension member (3) at a distance H1 from the closed bottom side (6).

Abstract: An apparatus for generating encoded data includes processing circuitry configured to encode data using a Mojette transform (MT) based on generating encoded representations of data blocks. Generating the encoded representations of data blocks includes reading data in the form of a data block formatted according to specified settings to comprise rows and columns, creating a set of projections, and outputting the created set of projections to enable storage of the data in the form of the set of projections. The apparatus then transmits the encoded data over a network to another device. Additionally, creating the set of projections includes applying the Mojette transform on the data block, and creating a first number of projections based on mapping each row of the data block to a corresponding projection, wherein the first number of projections carries the same information as a corresponding row.

Abstract: A method of redundantly encoding data includes formatting the data into columns and rows, and generating first and second sets of projections of the data using an encoding transform. For each set of projections generated, an encoding parameter of the encoding transform is set to a different value. The first and second sets of projections are stored as the encoded data. A decoding method reads settings including an indication of a number of data fragments. The number of data fragments is compared to a number of projections in a first set of projections of the encoded data in order to determine whether to use a first or a second decoding mode. The encoded data is then decoded according to the selected decoding mode and the result is outputted.

Abstract: There is provided mechanisms for data relaying in a wireless communications network. A method is performed by a network node. The method comprises transmitting a trigger message for a second wireless device to transmit uplink data in a timeslot. The method comprises transmitting downlink data to a first wireless device in the timeslot.

Abstract: An UL carrier frequency or a downlink carrier frequency is adapted as a consequence of a determination that there is a difference in link budgets between uplink and downlink. Since a downlink provides a geographical coverage that is of a certain size, a lesser reliability of the uplink has a consequence that a mobile terminal may not be able to communicate when located far from a network node that transmits the downlink but still within the geographical coverage area of the downlink. Such drawbacks of present day wireless communication systems can be at least mitigated by embodiments of the present disclosure.

Abstract: A method of an access point is disclosed. The access point is adapted to communicate (using a frequency bandwidth comprising one or more sub-bands) with wireless communication devices associated with the access point. Each of the wireless communication devices is adapted to operate under at least one of first and second latency requirements, wherein the first latency requirement is lower than the second latency requirement. Each of the wireless communication devices is also adapted to use a listen-before-talk approach (e.g. carrier sense multiple access with collision avoidance—CSMA/CA) to access a sub-band for transmission.

Abstract: An Access Point (AP) 402 and a method therein for Multi-User Clear-To-Send (MU CTS) signaling between the AP and at least one wireless station (STA) 404,406. The AP sends a Request To Send (RTS) packet directed to multiple STAs. The RTS packet is indicating at least two STAs, to which the AP would like to transmit, and a configuration of a CTS packet to be used by said at least two STAs when responding to the RTS packet. The configuration enables the AP to identify the at least two STAs when the at least two STAs are transmitting a respective CTS packet. Further the AP receives, from at least one STA, a respective CTS packet transmitted in accordance with the indicated configuration, thereby enabling the AP to identify the at least one STA transmitting the respective CTS packet.

Abstract: The proposed technology provides methods, devices and computer programs for performing data error detection and correction. It is provided a method for performing data error detection and correction. The method comprises the step S1 of providing multiple Mojette transform projections (pi,q,) obtained by applying an encoding Mojette transform on an input, or original, block of data elements or values. The method also comprises decoding S2 the multiple Mojette transform projections to form a reconstructed block of data elements or values. The method also comprises investigating S3 whether any of the decoded Mojette transform projections comprises at least one bin?0 following generation of the reconstructed block, thus providing an indication that a data error has been detected in the reconstructed block. The method also comprises determining S4, if at least one bin?0, a corrected reconstructed block of data elements or values based on the decoded Mojette transform projections.

Abstract: The present disclosure discloses a method used in a UE for estimating a frequency offset between a CRS of a serving cell of the UE and a DM-RS of a data transmission to be decoded by the UE, using a set of quasi-co-located reference signals. The method comprises: comparing a number of Resource Blocks, RBs, for the data transmission to a first threshold; selecting one or more quasi-co-located reference signals from the set of quasi-co-located reference signals based on a result of the comparison; and estimating the frequency offset based on the selected one or more quasi-co-located reference signals. The present disclosure also relates to a UE for estimating a frequency offset between a CRS of a serving cell of the UE and a DM-RS of a data transmission to be decoded by the UE, using a set of quasi-co-located reference signals.

Abstract: A method for an access point of a wireless communication network is disclosed. The access point is adapted to use a communication channel resource to communicate with a plurality of first wireless communication devices using orthogonal frequency division multiple access (OFDMA) and to communicate with a plurality of second wireless communication devices using carrier sense multiple access with collision avoidance (CSMA/CA). The communication channel resource comprises a bandwidth of frequencies dividable into a plurality of sub-carriers for OFDMA. The method comprises alternating between communication using OFDMA and communication using CSMA/CA, and—during communication using OFDMA—alternating between uplink communication and downlink communication.

Abstract: A communications device and a method therein for accessing a Resource Unit (RU) are provided. The communications device and an Access Point (AP) are operating in a wireless communications network. When wanting to start an access attempt within a time interval, the communications device selects a counter value from a first range given by zero and a first Contention-Window OFDMA (CWO) value CWO1. Further, when wanting to start an access attempt outside the time interval, the communications device selects the counter value from a second range given by zero and a second CWO value CWO2, wherein the second CWO value CWO2 is larger than the first CWO value CWO1. The communications device performs a contention procedure using the selected counter value, wherein a Resource Unit (RU) is accessed in dependence of the performed contention procedure.

Abstract: A first communications device 102 and a method therein for transmitting data to a second communications device 104 on a sub-channel. The first device performs carrier sensing on a first sub-channel assigned an unknown occupancy state. When the first sub-channel is determined as being vacant, the first device transmits, to the second device, the data on the first sub-channel. When the first sub-channel is determined as being occupied, the first device assigns the first sub-channel an occupied state, starts a first time period associated with the first sub-channel, and performs carrier sensing on a second sub-channel assigned with the unknown occupancy state. When the second sub-channel is determined as being vacant, the first device transmits, to the second device, the data on the second sub-channel. In absence of the second sub-channel assigned an unknown occupancy state, the first device enters an inactive mode until the first time period has expired.

Abstract: A method of redundantly encoding data includes formatting the data into columns and rows, and generating first and second sets of projections of the data using an encoding transform. For each set of projections generated, an encoding parameter of the encoding transform is set to a different value. The first and second sets of projections are stored as the encoded data. A decoding method reads settings including an indication of a number of data fragments. The number of data fragments is compared to a number of projections in a first set of projections of the encoded data in order to determine whether to use a first or a second decoding mode. The encoded data is then decoded according to the selected decoding mode and the result is outputted.

Abstract: A method for an access point of a wireless local area network is disclosed for counteracting problems with hidden nodes. The method comprises, for each individual terminal of a plurality of terminals wirelessly connected to the access point, detecting whether that individual terminal is a hidden node for one or more of the other terminals of the plurality of terminals. The method further comprises requesting that individual terminal to apply RTS/CTS signaling for data to be transmitted from that individual terminal to the access point only if it is detected that said individual terminal is a hidden node. A corresponding access point is also disclosed.

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 node in a wireless communication network uses a modified data-to-subcarrier mapping on at least a selective basis, wherein the modified mapping effectively extends the cyclic prefix (CP) of a transmission targeted to a given receiver without extending the CP of the Orthogonal Frequency Division Multiplex (OFDM) symbol in which the transmission is conveyed. This approach allows, for example, the node to use a first or normal data-to-subcarrier mapping for transmissions that are targeted to receivers that do not need an effective increase of the CP length, while using the modified mapping for those receivers that need a longer effective CP length, e.g., because of receiver type or channel conditions.

Abstract: There is provided a method of estimating channel spread at a receiver of a user equipment, UE, for one antenna port of a network node. The method is performed in the UE. The method comprises acquiring channel estimates for one antenna port of a network node. The method further comprises determining a variation of acquired channel estimates representing subframes associated with a common precoder, the subframes comprising resource blocks scheduled to the UE. The method further comprises estimating the channel spread by using a pre-determined mapping from the determined variation to a channel spread value. A user equipment and a computer program are also provided.