a connection set up function 430 of a driver software 410 510 without the involvement of any connection set up hardware on the wlan chip they may be realized by the mac software on the host cpu 505 fig7 illustrates a process of transmitting data frames performed by a wlan station during encrypted wlan communication according to an embodiment the wlan station may comprise the components depicted in fig4 or fig5 a driver software 410 510 writes data frames intended for data frame encapsulation to an ocm circuit 525 on a wlan chip 420 520 in step 705 and triggers the transmission process on the mac hardware partition of the wlan chip 420 520 each of the data frames may contain an additional header comprising cipher information which indicates determining factors for performing the data frame encapsulation e g the cipher protocol and cryptographic key to be applied and information on data frame fragmentation in step 710 a prioritization algorithm within the mac hardware on the wlan chip 420 520 selects a data frame to be sent on air and the selected data frame is read from the ocm circuit 525 in step 715 the following data frame encapsulation 760 comprises inserting a packet number and or sequence number into the selected.