The disclosure provides a method in a terminal device for a wireless communication network. The terminal device is configurable with a plurality of transmission time intervals. The method comprises; receiving a first grant message from the wireless communication network, the first grant message comprising an indication of first radio resources in which the terminal device can transmit one or more wireless messages, the first radio resources being configured according to a first transmission time interval of the plurality of transmission time intervals; determining the presence of data to transmit, the data being associated with a first logical channel; determining a maximum transmission time interval associated with the first logical channel; and, responsive to a determination that the maximum transmission time interval associated with the logical channel is less than the first transmission time interval, transmitting a scheduling request message to the wireless communication network. The scheduling request message is configured according to a second transmission time interval of the plurality of transmission time intervals, which is shorter than the first transmission time interval.