Abstract: A technique for performing time synchronization between a master device and a slave device is disclosed. A method implementation of the technique is performed by the master device and comprises transmitting, using optical wireless signals, a timestamp representative of a clock time of the master device to the slave device, wherein the timestamp is encoded using a color-based optical coding scheme and is to be used by the slave device to set a clock time of the slave device in accordance with the timestamp to thereby synchronize the clock time of the slave device with the clock time of the master device.

Abstract: Transmission of one or more packets in a communication environment. Each packet includes one or more channel measurement fields, and the one or more packets together comprising at least first and second channel measurement fields. A first transmitter configuration for the first channel measurement field and a second transmitter configuration for the second channel measurement field are selected. The first and second transmitter configurations include pseudo-randomly different phase and/or amplitude shifts for the channel measurement fields. A method is also disclosed for a receiver configured to perform measurements on one or more packets in a communication environment.

Abstract: A method is disclosed for controlling wireless sensing when opportunistic sensing is available for providing a first set of sensing measurements, wherein the opportunistic sensing comprises sensing measurements on packets transmitted for other purposes than wireless sensing. When the first set of sensing measurements provided by opportunistic sensing is insufficient for determination of a sensing result a session of dedicated sensing for providing a second set of sensing measurements is triggered. Opportunistic sensing includes sensing measurements on packets transmitted for other purposes than wireless sensing, and dedicated sensing comprises sensing measurements on one or more sensing packets transmitted specifically for wireless sensing. Corresponding computer program product, apparatus, and sensing control node are also disclosed.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless access in communications networks comprising radio access network nodes and wireless light communication network nodes. In one embodiment, a method is performed by a radio access network node for selecting a transmit or receive beam for communication with a wireless device in a communication network. The radio access network node comprises a plurality of antenna elements configurable to provide a plurality of transmit or receive beams. The communication network further comprises one or more wireless light communication, LC, network nodes.

Abstract: A wireless communication device (200), which is equipped with a photodetector (202) and a light-emitting diode (201), detects a first electrical response of the light-emitting diode (201) to an optical communication signal and a second electrical response of the photodetector (202) to the optical communication signal. Based on the detected first electrical response and the detected second electrical response, the wireless communication device (210) performs Multiple-Input Multiple-Output reception processing to receive data from at least one further wireless communication device (210).

Abstract: Using a light-emitting diode, LED, (211, 221) of the wireless communication device (210, 220) as a receiver, a wireless communication device (210, 220) receives an optical reference signal from an LED (211, 221) of a further wireless communication device. Based on the optical reference signal as received by the LED (211, 221), the wireless communication device (210, 220) estimates a first channel gain of an optical channel from the LED (211, 221) of the further wireless communication device (210, 220) to the LED (211, 221) of the wireless communication device (210, 220). Based on the estimated first channel gain, the wireless communication device (210, 220) estimates a second channel gain of an optical channel from the LED (211, 221) of the wireless communication device (210, 220) to the LED (211, 221) of the further wireless communication device (210, 220).

Abstract: Transmission of one or more packets in a communication environment. Each packet includes one or more channel measurement fields, and the one or more packets together comprising at least first and second channel measurement fields. A first transmitter configuration for the first channel measurement field and a second transmitter configuration for the second channel measurement field are selected. The first and second transmitter configurations include pseudo-randomly different phase and/or amplitude shifts for the channel measurement fields. A method is also disclosed for a receiver configured to perform measurements on one or more packets in a communication environment.

Abstract: A position of a wireless device (11) is determined based on an optical communication signal transmitted between the wireless device (11) and one or more access points (10) of the wireless communication network. The determined position is used for controlling beamforming processing of radio communication signals transmitted between the wireless device (10) and one or more second access points (10) of the wireless communication network.

Abstract: A wireless communication device (11, 100) uses at least one light emitting diode (LED) as a transmitter to send outgoing optical wireless communication signals to a further wireless communication device (11, 100). Further, using the at least one LED as a receiver, the wireless communication device (11, 100) receives incoming optical wireless communication signals from the further wireless communication device (11, 100). Based on at least some of the received incoming optical wireless communication signals, the wireless communication device (11, 100) estimates a channel characteristic for the outgoing optical wireless communication signals.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless communication in communication networks enabled for wireless light communication. In one embodiment, a method is performed in a node of a communication network. The method enables data communication to be established between a first wireless device and the communication network upon a wireless Light Communication (LC) link between the first wireless device and an LC-enabled Access Point (AP) of the communication network becoming unavailable. The method comprises: identifying a second wireless device for relaying data between the first wireless device and the communication network via a first communication link between the first wireless device and the second wireless device and a second communication link between the second wireless device and an AP of the communication network associated with the second wireless device.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless communication in communication networks comprising a wireless device, a radio access network node and a wireless light communication network node. In one embodiment, a method is performed by a node (102, 104, 120) of a wireless communication network (100), the wireless communication network comprising a wireless device (104), a radio access network node (102) and one or more wireless light communication (LC) network nodes (106). At least one of the wireless device and the radio access network node comprise a plurality of antenna elements configurable to provide a transmit or receive beam (110, 112) for communication with the other of the wireless device and the radio access network node.

Abstract: A method of a communication device configured with two or more multi-user coordination modes for communication with a plurality of users is disclosed. The method comprises determining an available spatial selectivity for the plurality of users, and selecting one of the two or more multi-user coordination modes based on the determined available spatial selectivity and a number of users of the plurality. Corresponding apparatus, communication receiver and computer program product are also disclosed.

Abstract: A technique for performing time synchronization between a master device (200) and a slave device (210) is disclosed. A method implementation of the technique is performed by the master device (200) and comprises transmitting, using optical wireless signals, a timestamp representative of a clock time of the master device (200) to the slave device (210), wherein the timestamp is encoded using a color-based optical coding scheme and is to be used by the slave device (210) to set a clock time of the slave device (210) in accordance with the timestamp to thereby synchronize the clock time of the slave device (210) with the clock time of the master device (200).

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless access in communications networks comprising radio access network nodes and wireless light communication network nodes. In one embodiment, a method is performed by a radio access network node for selecting a transmit or receive beam for communication with a wireless device in a communication network. The radio access network node comprises a plurality of antenna elements configurable to provide a plurality of transmit or receive beams. The communication network further comprises one or more wireless light communication, LC, network nodes.

Abstract: In a wireless communication system, an access point (10) contends with at least one further access point (10) for a set of transmission resources. In response to winning contention for the set of transmission resources, the access point (10) shares at least a subset of the transmission resources with the at least one further access point (10). In addition, the access point (10) exchanges information with the at least one further access point (10). Based on the exchanged information, the access point (10) coordinates wireless transmissions on the shared subset of transmission resources.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless access in communications networks comprising radio access network nodes and wireless light communication network nodes. In one embodiment, a method is performed by a radio access network node for selecting a transmit or receive beam for communication with a wireless device in a communication network. The radio access network node comprises a plurality of antenna elements configurable to provide a plurality of transmit or receive beams. The communication network further comprises one or more wireless light communication, LC, network nodes.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless communication in communication networks enabled for wireless light communication. In one embodiment, a method is performed in a node of a communication network. The method enables data communication to be established between a first wireless device and the communication network upon a wireless Light Communication (LC) link between the first wireless device and an LC-enabled Access Point (AP) of the communication network becoming unavailable. The method comprises: identifying a second wireless device for relaying data between the first wireless device and the communication network via a first communication link between the first wireless device and the second wireless device and a second communication link between the second wireless device and an AP of the communication network associated with the second wireless device.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless communication in communication networks comprising a wireless device, a radio access network node and a wireless light communication network node. In one embodiment, a method is performed by a node (102, 104, 120) of a wireless communication network (100), the wireless communication network comprising a wireless device (104), a radio access network node (102) and one or more wireless light communication (LC) network nodes (106). At least one of the wireless device and the radio access network node comprise a plurality of antenna elements configurable to provide a transmit or receive beam (110, 112) for communication with the other of the wireless device and the radio access network node.

Abstract: In one example aspect, a method of determining a channel estimate of an optical communications channel between at least one optical transmitting component and at least one optical receiving component is provided, the method comprising determining a location of at least one optical transmitting component, determining an orientation of the at least one optical transmitting component, determining a transmission characteristic of the at least one optical transmitting component, determining a location of at least one optical receiving component, determining an orientation of the at least one optical receiving component, determining a reception characteristic of the at least one optical receiving component, and calculating the channel estimate of the optical communications channel based on the location of the at least one optical transmitting component, the orientation of the at least one optical transmitting component, the transmission characteristic of the at least one optical transmitting component, the location

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless access in communications networks comprising radio access network nodes and wireless light communication network nodes. In one embodiment, a method is performed by a radio access network node for selecting a transmit or receive beam for communication with a wireless device in a communication network. The radio access network node comprises a plurality of antenna elements configurable to provide a plurality of transmit or receive beams. The communication network further comprises one or more wireless light communication, LC, network nodes.