Embodiments provide apparatuses, methods and a computer programs for a base station transceiver and a mobile transceiver. An apparatus for a base station transceiver of a communication system comprises a transceiver module operable to communicate radio signals with a plurality of mobile transceivers using a plurality of radio resources. The apparatus further comprises a control module operable to control the transceiver module, and operable to receive access messages from a first subgroup of one or more mobile transceivers from the plurality of mobile transceivers using a first subgroup of the plurality of radio resources. The control module is further operable to receive access messages from a second subgroup of one or more mobile transceivers from the plurality of mobile transceivers using a second subgroup of the plurality of radio resources. An apparatus for a mobile transceiver of a communication system is also provided as well as methods associated therewith.