Abstract: Systems and methods are disclosed herein that enable protecting a higher priority radio technology (e.g., 3GPP New Radio (NR) or NR in Unlicensed spectrum (NR-U)) when co-existing with an unlicensed radio technology (e.g., the Wi-Fi wireless network technology) operating in the same frequency band. In one embodiment, a method of operation of a radio access node of radio access network of a cellular communications system comprises transmitting a Request to Send (RTS) frame within a Time Division Duplexing (TDD) radio frame on a cell served by the radio access node in an unlicensed frequency band. The method further comprises transmitting a downlink transmission to a wireless communication device or receiving an uplink transmission from the wireless communication device, on the cell served by the radio access node in the unlicensed spectrum during a period of time that corresponds to a duration of time indicated in the RTS frame.

Abstract: There is disclosed a method of operating a radio node in a wireless communication network, the radio node being adapted for accessing a carrier for transmission based on a Clear Channel Assessment procedure, the method including transmitting Short Control Signaling on the carrier without a CCA procedure and/or with limited CCA procedure based on the fulfillment of one or more SCS criteria. The disclosure also pertains to related devices and methods.

Abstract: A system for multi-link transmission in a wireless network having multiple nodes. Each node defines a corresponding coverage area and is configured to perform operations in the wireless network. The system has a device configured to transition between nodes and corresponding coverage areas and perform operations in the wireless network, a controller causing transmission of data between the device and a set of nodes using a multi-link connection. The multi-link includes a first transmission link and a second transmission link associating the device with the node set. The controller causes transmission of data over the first transmission link and/or the second transmission link. The same frequency and same cell identifier is allocated to the node set for transmission of data in the first transmission link. Different cell identifiers are allocated to respective node in the node set for transmission of data in the second transmission link.

Abstract: According to one embodiment, an electronic apparatus includes a transmitter circuitry, a receiver circuitry, and a processing circuitry. The transmitter circuitry transmits a first data frame including first data to a destination apparatus. The receiver circuitry receives first acknowledgment information indicative of a reception state of the first data included in the first data frame. The receiver circuitry receives second acknowledgment information indicative of a reception state of the first data included in a second data frame. The second data frame is transmitted from another electronic apparatus to the destination apparatus. The processing circuitry determines whether the first data frame is retransmitted, based on at least one of the first and second acknowledgment information.

Abstract: Methods and apparatuses are disclosed for energy detection in unlicensed spectrum. In one embodiment, a method implemented in a radio node includes determining a maximum channel occupancy time (MCOT) value; and listen-before-talk (LBT) parameter settings, the MCOT value and/or the LBT parameter settings for one or more LBT parameters depending on an energy detection (ED) threshold value used to access a channel in an unlicensed spectrum; and performing a LBT procedure to gain access to the channel and a transmission on the channel according to the LBT parameter settings and the MCOT value. In one embodiment, a method in a network node includes configuring a wireless device with a MCOT value and LBT parameter settings, the MCOT value and/or LBT parameter settings depending on an ED threshold value used at the wireless device to access the channel.

Abstract: There is disclosed a method of operating a radio node in a wireless communication network, the radio node being adapted for accessing a carrier for transmission based on a Clear Channel Assessment procedure, the method including transmitting Short Control Signaling on the carrier without a CCA procedure and/or with limited CCA procedure based on the fulfillment of one or more SCS criteria. The disclosure also pertains to related devices and methods.

Abstract: A method is disclosed for a wireless transceiver comprising a plurality of transceiver antenna elements and configured to operate in a communication network. The method comprises dynamically assigning (from the plurality of transceiver antenna elements) a first set of transceiver antenna elements allocated for channel sensing and a second set of transceiver antenna elements allocated for communication, performing channel sensing using the first set of transceiver antenna elements, and operating the wireless transceiver based on a result of the performed channel sensing.

Abstract: Methods and systems for dynamically adapting an Energy Detection (ED) threshold for use in an unlicensed network are provided. According to one aspect, a method for dynamically adapting ED threshold for use in an unlicensed network comprises determining an ED threshold based on a current state of an unlicensed network and using the determined ED threshold for channel sensing and/or signaling the ED threshold to another entity for use during channel sensing.

Abstract: According to one embodiment, an electronic apparatus includes a receiver and a transmitter. The receiver is configured to receive, from a first wireless apparatus, a first physical frame including a destination address receivable by a second wireless apparatus different from the electronic apparatus. The transmitter is configured to transmit, to the first wireless apparatus, a first response frame including first information regarding the first physical frame, if the first physical frame is successfully received. A transmission period of the first response frame at least partially overlaps with a transmission period of a second response frame including second information regarding the first physical frame received by the second wireless apparatus.

Abstract: According to one embodiment, a wireless communication device includes: controlling circuitry configured to change a value of a first parameter in accordance with a history of uplink multi-user transmission or whether capability of uplink multi-user transmission is in an enabled or disabled state, the first parameter defining an upper limit of duration during which a wireless medium is allowed to be occupied; and a transmitter configured to transmit a first frame.

Abstract: According to one embodiment, a wireless communication device includes: controlling circuitry configured to change a value of a first parameter in accordance with a history of uplink multi-user transmission or whether capability of uplink multi-user transmission is in an enabled or disabled state, the first parameter defining an upper limit of duration during which a wireless medium is allowed to be occupied; and a transmitter configured to transmit a first frame.

Abstract: According to one embodiment, an electronic apparatus includes a transmitter circuitry and a receiver circuitry. The transmitter circuitry is configured to; transmit a first frame to a first terminal, and transmit a second frame to a second terminal when a first period elapsed after transmission of the first frame. The receiver circuitry is configured to receive a third frame including acknowledgement information of the first frame from the first terminal when the first period elapsed after transmission of the first frame. A duration of the second frame is set as equal to or greater than a difference between a duration of the third frame and a duration of the first frame.

Abstract: According to one embodiment, an electronic apparatus includes a transmitter circuitry, a receiver circuitry, and a processing circuitry. The transmitter circuitry transmits a first data frame including first data to a destination apparatus. The receiver circuitry receives first acknowledgment information indicative of a reception state of the first data included in the first data frame. The receiver circuitry receives second acknowledgment information indicative of a reception state of the first data included in a second data frame. The second data frame is transmitted from another electronic apparatus to the destination apparatus. The processing circuitry determines whether the first data frame is retransmitted, based on at least one of the first and second acknowledgment information.

Abstract: According to one embodiment, an electronic apparatus includes a receiver and a transmitter. The receiver is configured to receive, from a first wireless apparatus, a first physical frame including a destination address receivable by a second wireless apparatus different from the electronic apparatus. The transmitter is configured to transmit, to the first wireless apparatus, a first response frame including first information regarding the first physical frame, if the first physical frame is successfully received. A transmission period of the first response frame at least partially overlaps with a transmission period of a second response frame including second information regarding the first physical frame received by the second wireless apparatus.

Abstract: According to one embodiment, a wireless communication device includes a receiver and a transmitter. The receiver receives a first frame in a predetermined frequency band. The transmitter transmits a second frame in the predetermined frequency band at a same time as receipt of the first frame. The transmitter transmits control information that controls a transmission timing of a third frame that is a response frame to the second frame. The transmitter transmits a fourth frame that is a response frame to the first frame, at a timing according to the control information.

Abstract: According to one embodiment, an electronic apparatus includes a transmitter circuitry and a receiver circuitry. The transmitter circuitry is configured to; transmit a first frame to a first terminal, and transmit a second frame to a second terminal when a first period elapsed after transmission of the first frame. The receiver circuitry is configured to receive a third frame including acknowledgement information of the first frame from the first terminal when the first period elapsed after transmission of the first frame. A duration of the second frame is set as equal to or greater than a difference between a duration of the third frame and a duration of the first frame.

Abstract: According to one embodiment, a wireless communication device includes: controlling circuitry configured to change a value of a first parameter in accordance with a history of uplink multi-user transmission or whether capability of uplink multi-user transmission is in an enabled or disabled state, the first parameter defining an upper limit of duration during which a wireless medium is allowed to be occupied; and a transmitter configured to transmit a first frame.

Abstract: According to one embodiment, a wireless communication device includes: controlling circuitry configured to change a value of a first parameter in accordance with a history of uplink multi-user transmission or whether capability of uplink multi-user transmission is in an enabled or disabled state, the first parameter defining an upper limit of duration during which a wireless medium is allowed to be occupied; and a transmitter configured to transmit a first frame.

Abstract: According to one embodiment, an electronic apparatus includes a receiver configured to receive a first frame in a first frequency band within a first period from a first apparatus; and a transmitter configured to transmit a second frame in the first frequency band within the first period to a second apparatus. A transmission power of the second frame depends on both a reception quality required by the second apparatus to receive the second frame and an amount of interference from the first apparatus to the second apparatus.

Abstract: According to one embodiment, a wireless communication device includes a receiver and a transmitter. The receiver receives a first frame in a predetermined frequency band. The transmitter transmits a second frame in the predetermined frequency band at a same time as receipt of the first frame. The transmitter transmits control information that controls a transmission timing of a third frame that is a response frame to the second frame. The transmitter transmits a fourth frame that is a response frame to the first frame, at a timing according to the control information.