Serving cell interruption in multicarrier with shortened TTI patterns

A wireless device for a wireless communication system supporting at least one transmission time interval, TTI, the wireless device comprising:

• processing circuitry configured to:
• communicate with a network node in a first cell on a first carrier;
• determine an operation to be performed by the wireless device in a second cell on a second carrier;
• perform the determined operation in the second cell;
• and
• interrupt the communicating with the network node in the first cell on the first carrier according to a value of an interruption parameter that does not exceed an interruption threshold that depends on a duration of a TTI on the first carrier and further depends on a frequency separation between the first carrier and the second carrier.

A method in a network node for a wireless communication system supporting at least one transmission time interval, TTI, the method comprising:

• communicating with a wireless device in a first cell on a first carrier;
• configuring the wireless device to perform an operation in a second cell on a second carrier;
• determining a value of an interruption parameter according to which communication with the wireless device in the first cell on the first carrier is to be interrupted, the value of the interruption parameter not exceeding an interruption threshold that is based on a duration of a TTI on the first carrier and further depends on a frequency separation between the first carrier and the second carrier;
• and
• interrupting communication with the wireless device in the first cell on the first carrier according to the value of the interruption parameter while the wireless device performs the operation.

A network node for a wireless communication system supporting at least one transmission time interval, TTIs, the network node comprising:

• a transceiver configured to communicate with a wireless device in a first cell on a first carrier;
• and
• processing circuitry configured to:
• configure the wireless device to perform an operation in a second cell on a second carrier;
• determine a value of an interruption parameter according to which communication with the wireless device in the first cell on the first carrier is to be interrupted, the value of the interruption parameter not exceeding an interruption threshold that is based on a duration of a TTI on the first carrier and further depends on a frequency separation between the first carrier and the second carrier;
• and
• interrupt communication with the wireless device in the first cell on the first carrier according to the value of the interruption parameter while the wireless device performs the operation.