Abstract:
This document discloses a solution for detecting a transmission opportunity. According to an aspect, a method comprises as performed by an apparatus of a first wireless network: detecting a first transmission from a first apparatus of a second wireless network different from the first wireless network; transmitting, to a second apparatus of the first wireless network, a transmission mode request, wherein the transmission mode request indicates a request to transmit from the apparatus to the second apparatus at least during an interframe space of a transmission opportunity between the first apparatus and another apparatus of the second wireless network, receiving a transmission mode response from the second apparatus, wherein the transmission mode response indicates acceptance of the request; in response to detecting a second transmission from the first apparatus, transmitting a data frame during an interframe space following the second transmission.
Abstract:
This document discloses a solution for selecting a frequency channel for a service. According to an aspect, a method comprises: receiving, by a first access node of a first wireless network, a scanning message comprising at least one information element indicating a channel access limit for a frequency channel operated by a second access node of a second wireless network; selecting, by the first access node on the basis of the at least one information element, the frequency channel or another frequency channel for an ultra-reliable low-latency (URLLC) service provided by the apparatus; and upon selecting the frequency channel for the URLLC service, causing by the first access node transmission of frames of the service within channel access limits indicated by the at least one information element.
Abstract:
A method comprising determining that interference may occur in a wireless network an apparatus is connected to, obtaining a first link that is of a first type, obtaining a second link that is of a second type, determining data to be transmitted from the apparatus to another apparatus connected to the wireless network, determining that a transmission occurs in the first link and transmitting the data in the second link, wherein the transmission in the first link has a longer duration than transmitting the data in the second link and the transmission in the first link and transmitting the data in the second link overlap in time.
Abstract:
This document discloses a solution for providing channel usage information. In an embodiment, an apparatus managing a wireless network and being in an unassociated state towards an access node managing another wireless network is provided with the channel usage information. The channel usage information is provided together with a further information element enabling the apparatus to verify that the channel usage information originates from a trusted source.
Abstract:
A transmitter is configured to set a counter to a starting value, sense whether a channel is busy or idle and to update the counter value during sensing. When there is data to be transmitted, the transmitter is configured to determine, based on at least the counter value at a transmit opportunity and a duration the channel has been sensed idle before the transmit opportunity, whether to transmit the data or to continue the sensing the channel to a next transmit opportunity without reset- ting the counter value to the starting value.
Abstract:
According to an example aspect of the present invention, there is provided a method, comprising: transmitting, by a first transceiver of a first radio technology, wherein a first device comprises the first transceiver, a calibration start message to a second device, transmitting a calibration message by a second transceiver of a second radio technology, wherein the first device comprises the second transceiver, receiving channel state information, by the first transceiver from the second device, wherein the channel state information is based on reception of the calibration message, determining at least one coefficient for null steering towards the second device based on the channel state information, and transmitting a directional message to a third device, using the at least one coefficient.
Abstract:
This document discloses a solution for controlling connectivity of a dormant station. According to an aspect, a method comprises: entering, by a station of a wireless network, a dormant mode in which a main radio interface of the station is disabled and a wake-up radio interface of the station is enabled; scanning, by the station, for a beacon signal by using the wake-up radio interface in the dormant mode and determining, as a result of said scanning that no beacon signal is detected; as a response to said determining, switching by the station from the dormant mode, enabling the main radio interface, and transmitting to a wireless device a frame comprising an information element indicating incapability of detecting said beacon signal; and receiving, by the station from the wireless device, a frame indicating improved conditions for detecting a further beacon signal and, upon reception of the message, returning by the station to the dormant mode.
Abstract:
A method and apparatus for detecting, by a first device, a timing measurement frame from a second device, the timing measurement frame having a plurality of time measurement samples, wherein at least the first of the measurement samples has a transmit timestamp value; determining transmit timing values for the subsequent measurement samples; applying a receive timestamp value to each of the received measurement samples; and determining a relative clock drift between a clock of the first device and a clock of the second device by comparing the receive timestamp values with transmit timing values of one or more measurement samples contained in the frame.
Abstract:
This document discloses a solution for selecting a network discovery method in an apparatus. According to an aspect, the apparatus performs the following: performing initial channel assessment of a radio channel at maximum a determined time period shorter than or equal to the shortest of a plurality of discovery frame broadcast periodicities employed by access nodes the apparatus is configured to search for in network discovery; upon determining that a transmission has been detected in the initial channel assessment, selecting a network discovery according to a first network discovery method; and upon detecting no transmission on the radio channel during the initial channel assessment, selecting network discovery according to a second network discovery method different from the first network discovery method
Abstract:
An example method comprises receiving by an apparatus, a message from an access node, including at least one of a delay value indicating a duration to wait before beginning to contend for access to the wireless network by a random backoff procedure to get a transmission opportunity, and an indication whether or not the apparatus is to use a predefined delay value to wait before beginning to contend for access; determining whether to use the delay value to wait before beginning to contend for access to the wireless network; waiting for a duration represented by the delay value, when the apparatus has data to transmit over the wireless network; and beginning to contend for access to the wireless network by a random backoff procedure after the wait duration, before initiating transmission.