A mobile communications system includes a radio access network, such as an Enhanced General Packet Radio Service (EGPRS) network, in which mobile stations are able to enter into a discontinuous transmission (DTX) mode. During DTX mode of a first mobile station that is allocated a channel portion (e.g.,...http://www.google.de/patents/US7068623?utm_source=gb-gplus-sharePatent US7068623 - Communicating traffic over a wireless channel in a mobile communications system