 included in the AAI_HO-IND message, bandwidth request size should be transferred to the target BS. AAI_L2-XFER This is a generic MAC control Inter-RAT Encrypted/ICV Unicast AAI L2 Transfer message which acts as Operation a generic service container for various services including, but not limited to, device provisioning bootstrap message to the MS, GPS assistance delivery to the MS, Base stations geo-location unicast delivery to the MS, IEEE 802.21 MIH transfer, messaging service, etc. This container is also used for (Continued) Table 6-8 IEEE 802. 16m MAC Management/Control Messages [1,2] Continued 802.16- IEEE 802.16m Standard MAC Management Equivalent Security Connection Message Message Description Usage Message Attributes IEEE 802. 16m messages that are not processed by the BS, rather they are processed by the network entities beyond the BS. The AAI_L2_XFER message is transmitted only by an authenticated MS. AAI_SII-ADV This message is transmitted Inter-RAT Broadcast Service Identity when the BS is ready to send Operation Information the Media Independent Advertisement Handover (MIH) response in a multi-RAT operation. The BS transmits this message containing the MIH response in the MAC frame AAI_PAG-ADV This message is sent by the Idle Mode MOB_PAG- Broadcast BS Paging BS on the broadcast Idle Operation Advertisement Mode multicast connection during the BS paging interval. AAI_DREG-REQ This message is sent by the Idle Mode DREG-REQ Encrypted/ICV Unicast Deregistration MS to the serving BS in order Operation Request to notify the BS of the MS de- registration request from the network. AAI_DREG-RSP This message is sent by the Idle Mode DREG-RSP Encrypted/ Unicast Deregistration BS to confirm immediate Operation Command termination of the service by the BS and that the MS should attempt network entry with another BS later. When more than one paging groups are assigned to an MS, multiple Paging group IDs and the same number of paging offsets that correspond to the Paging group ID are included in the AAI_DREG-RSP 