Certain aspects of the present disclosure provide techniques for subchannel-based listen before talk (LBT). An example method that may be performed by a user equipment (UE) includes receiving one or more transmissions indicating one or more allocated subchannels of a frequency band that are allocated during a first time period, the frequency band comprising the one or more allocated subchannels and one or more unallocated subchannels during the first time period; sensing the one or more unallocated subchannels for at least a portion of the first time period prior to a second time period; and transmitting a signal within the frequency band during the second time period based on energy sensed for the one or more unallocated subchannels being less than a threshold.

[Object] To provide a wireless communication device and a wireless communication method capable of reducing an inequality of transmission opportunities occurring when a carrier sense level is changed.

[Solution] A wireless communication device includes: a wireless communication unit configured to perform wireless communication with another device; and a control unit configured to set a first carrier sense level and control a parameter used by the wireless communication unit to transmit data based on a comparison result between the set first carrier sense level and a second carrier sense level which is a default.

Device detection in networks with mixed mobility devices is discussed. Devices in the network first determine a discovery mode from a plurality of discovery modes, wherein the determining is based on a mobility state of the wireless device. The device identifies a set of resources associated with the determined discovery mode, wherein each of the plurality of discovery modes is provisioned with separate resources. A discovery signal is transmitted using the identified set of resources according to the discovery mode. Thus, devices with higher mobility will generally send discovery signals more often than devices that are static or semi-static.

A technique for transmitting and receiving data (502) on shared radio spectrum according to a listen after talk, LAT, procedure is described. As to a transmitting aspect of the technique, one or more parameters of the LAT procedure are set. At least one of the one or more parameters (510; 520) is set depending on at least one of a Quality of Service, QoS, requirement of the data and a state of the shared radio spectrum. The data (502) is transmitted on the shared radio spectrum according to the LAT procedure using the one or more parameters.

The present invention concerns a method for a communication device to transmit a data packet in a wireless communication system. The method comprises: determining (21) a first set of transmission parameters comprising a first central transmission frequency and a first spectral bandwidth; transmitting (33) a first data packet by applying the first set of transmission parameters; determining (35) whether or not the first data packet collided with a second data packet from a second communication device; determining (37) a second set of transmission parameters, which in case of collision comprises a second central transmission frequency, different from the first central transmission frequency, and a second spectral bandwidth, which is different from the first spectral bandwidth with a first, non-zero probability and the same as the first spectral bandwidth with a second probability; and transmitting (33) a second data packet by applying the second set of transmission parameters.

The method includes: an intercepting station detecting a first radio signal of a third-party station and updating a local network allocation vector and/or response indication deferral; triggering a channel contention access procedure when determining that a second radio signal of the third-party station meets a spatial orthogonal condition, and then completing data transmission within updated time. In the case that the network allocation vector or response indication deferral is not 0, the third-party station ignoring or resetting the network allocation vector or the response indication deferral when determining that a sector transmission in a transmission initiated by the station is orthogonal with a transmission space to be carried out by itself, the third-party station initiating a contention and starting the spatial orthogonal transmission within a duration indicated by the updated network allocation vector or the response indication deferral.

Various arrangements for performing uplink grant-free transmissions are presented herein. An instance of user equipment (UE) may determine data that is to be transmitted using a grant-free (GF) uplink transmission to a base station of a cellular network. The UE may select a first GF resource block and a second GF resource block. The UE may transmit GF transmissions that comprise: a data payload and a first pointer at the first GF resource block; and the data payload and a second pointer at the second GF resource block. The first pointer may refer to the second GF resource block, while the second pointer may refer to the first GP resource block.

A method to regulate a signal-to-noise ratio (SNR) in a rate adaptation includes: transmitting a frame; determining a status of the transmitted frame; computing a probability of a channel of the transmitted frame being in an idle mode; computing an SNR offset based on the status of the transmitted frame and the probability; and regulating an SNR for transmission, based on the SNR offset.

An apparatus includes a first media access control (MAC) device comprising a first radio transceiver and having a first MAC address and a second MAC device comprising a second radio transceiver and having a second MAC address. The second MAC device is operatively coupled to the first MAC device. The first MAC device is operative to receive first MAC layer data for the first MAC device and receive second MAC layer data for the second MAC device, and transmit the first MAC layer data and the second MAC layer data to an access point (AP) using the first radio transceiver of the first MAC device.

Methods and systems for managing communications among network devices are disclosed. An example method can comprise determining a time window for transmission based on a scheduling protocol. The scheduling protocol can specify time windows for using corresponding wireless protocols to transmit signals. Different wireless protocols can be associated with different time windows and different devices. A device can prevent transmissions during the time window, thereby allowing other devices to provide transmissions during the time window according to the scheduling protocol.