US Patent 11178660 Determining access slot for communications on radio interface

There is provided determining by an apparatus an access slot for communications on a first radio interface of a first and second radio interfaces. The first radio interface receives a first frame comprising at least one time related parameter for determining an access slot for communications on the first radio interface. After receiving the first frame, the apparatus is transitioned to a first operation mode, where the first radio interface radio interface is disabled. An access slot on the first radio interface may be determined based on the at least one time related parameter received before the first radio interface was disabled and based on the reception time of the frame on the second interface. In response to receiving a second frame on the second radio interface, the apparatus is transitioned to a second operational mode, where the first radio interface is enabled for transmission in the determined access slot.