A method of operating a device (101, 102, 112), comprising: - implementing a persistent allocation of a plurality of first resources to a first channel (261, 263) of a wireless link supported by an access node, the plurality of first resources being included in a sequence of first transmission frames (303, 311) of a transmission protocol implemented on the wireless link, the first transmission frames (303, 311) having at least one first frame structure, - temporarily overriding the persistent allocation for a subset of the plurality of first resources, and - while overriding: implementing a dedicated allocation of a plurality of second resources to a second channel of the wireless link, the plurality of second resources being included in at least one second transmission frame of the transmission protocol, the at least one second transmission frame having at least one second frame structure different from the at least one first frame structure, wherein said overriding comprises cropping the subset of the plurality of first resources from the plurality of first resources, the plurality of second resources are time-aligned with the cropped subset of the plurality of first resources, and said cropping of the subset of the plurality of first resources comprises using a shortened transmission frame of a transmission protocol implemented on the wireless link to create a transmission gap of communication on the first channel (261, 263) associated with the subset of the plurality of first resources, and the plurality of second resources is time-aligned with the transmission gap. - implementing a persistent allocation of a plurality of first resources to a first channel (261, 263) of a wireless link supported by an access node, the plurality of first resources being included in a sequence of first transmission frames (303, 311) of a transmission protocol implemented on the wireless link, the first transmission frames (303, 311) having at least one first frame structure, - temporarily overriding the persistent allocation for a subset of the plurality of first resources, and - while overriding: implementing a dedicated allocation of a plurality of second resources to a second channel of the wireless link, the plurality of second resources being included in at least one second transmission frame of the transmission protocol, the at least one second transmission frame having at least one second frame structure different from the at least one first frame structure, wherein said overriding comprises cropping the subset of the plurality of first resources from the plurality of first resources, the plurality of second resources are time-aligned with the cropped subset of the plurality of first resources, and said cropping of the subset of the plurality of first resources comprises using a shortened transmission frame of a transmission protocol implemented on the wireless link to create a transmission gap of communication on the first channel (261, 263) associated with the subset of the plurality of first resources, and the plurality of second resources is time-aligned with the transmission gap. wherein said overriding comprises cropping the subset of the plurality of first resources from the plurality of first resources, the plurality of second resources are time-aligned with the cropped subset of the plurality of first resources, and said cropping of the subset of the plurality of first resources comprises using a shortened transmission frame of a transmission protocol implemented on the wireless link to create a transmission gap of communication on the first channel (261, 263) associated with the subset of the plurality of first resources, and the plurality of second resources is time-aligned with the transmission gap.