Wireless channel switching

A method performed by a wireless device for utilizing a portion of wireless spectrum shared between multiple radio-access technologies, the portion of wireless spectrum comprising a plurality of channels at respective transmission frequencies, the method comprising:

• performing a listen-before-talk, LBT, test to check for wireless activity on a first channel in the plurality of channels prior to each transmission over the first channel;
• detecting an event which is indicative of congestion at the first channel, the first channel being assigned to the wireless device for accessing a cellular network, wherein the event which is indicative of congestion at the first channel comprises a maximum number of consecutive failures of the LBT test being reached;
• and
• responsive to detection of the event, initiating a procedure to switch to a second channel of the plurality of channels for accessing the cellular network, wherein the first channel and the second channel are both served by the same base station of the cellular network, and wherein the second channel belongs to a different bandwidth part, BWP, than the first channel.

A wireless device for utilizing a portion of wireless spectrum shared between multiple radio-access technologies, the wireless device comprising processing circuitry configured to:

• perform a listen-before-talk, LBT, test to check for wireless activity on a first channel in the plurality of channels prior to each transmission over the first channel;
• detect an event which is indicative of congestion at the first channel, the first channel being assigned to the wireless device for accessing a cellular network, wherein the event which is indicative of congestion at the first channel comprises a maximum number of consecutive failures of the LBT test being reached;
• and
• responsive to detection of the event, initiate a procedure to switch to a second channel of the plurality of channels for accessing the cellular network, wherein the first channel and the second channel are both served by the same base station of the cellular network, and wherein the second channel belongs to a different bandwidth part, BWP, than the first channel.