with Traffic Indication Message Flag for the MS. AAI_TRF_IND-RSP When the BS receives an Sleep Mode Encrypted/ICV Unicast Traffic Indication AAI_TRF_IND-REQ message Operation Response from an MS, the BS responds to the MS by sending the AAI_TRF_IND-RSP message with the Traffic Indication Message Flag. When the MS receives the AAI_TRF_IND- RSP message from the serving BS, it will update the current sleep cycle based on the Traffic Indication Message Flag in the AAI_TRF_IND-RSP message. AAI_NBR-ADV This message is transmitted Handover MOB_NBR- Null: in Unicast Unicast or Neighbor by the serving BS to provide Operation/Normal N/A: in Broadcast Broadcast Advertisement the MS with information about Operation neighbor base stations or relay stations including the following parameters: BS type (macro, micro, femto, relay, etc.); carrier frequency; MAC (Continued) Usage of total cell types, and segment information for this AAI_NBR-ADV message, system information of base stations from one or more cell types. AAI_SCN-REQ A message that is transmitted Handover Scanning Interval MOB_SCN- by the MS to request Encrypted/ICV Unicast Operation/Normal Allocation Request a scanning interval for the Operation purpose of seeking available legacy or new base stations and determining their suitability as targets for handover. An MS may request a scanning interval during the scan interleaving interval. AAI_SCN-RSP A message that is transmitted Handover Scanning Interval MOB_SCN- by the BS either unsolicited or Encrypted/ICV Unicast Operation/Normal Allocation Response in response to an AAI_SCN- Operation REQ message sent by an MS. The BS may transmit AAI_SCN-RSP to start MS scan reporting with or without scanning interval allocation. If the Scan Duration field contains a non-zero value, the system parameters (except cell bar information) which are carried through the superframe header are not changed during the scanning time specified in the AAI_SCN-RSP message. If the Scan Duration field contains a non-zero value, the scanning interva