For example, the transitions 288 from sleep state 281 to RRC connected state 283 or from RRC idle state 282 to RRC connected state 283 may involve performing an attach procedure for establishing the data connection 160 including payload channels of the wireless link 101. For example, the attach procedure 288 may include a Random Access of the terminal 130 in which based on a randomly selected code and/or temporary identifications of the terminal 130 collision with further terminals seeking to access the network 100 is mitigated. Typically, the Random Access is defined on a Physical layer according to the OSI model. For example, the attach procedure 288 may alternatively or additionally include control signaling defined on a higher layer according to the OSI model. Examples include an RRC attach procedure.
The transitions 289 from RRC connected state 283 to RRC idle state 282 or from RRC connected state 283 to RRC sleep state 281 may include an RRC release procedure. In