dovers, the RRC Connected mode UEs estimate their mobility state, enumerated as either normal, medium or high. UEs in the high mobility state are those experiencing the highest handover rate. Depending on the UEs' mobility state, handover parameters such as TTT are scaled to make the RRC Connected mode mobility performance more robust over the range of possible UE speeds. The TTT parameter influences the UE measurement reporting process and has an impact on the overall handover time. A lower TTT value is used for UEs operating in the high mobility state, thus essentially facilitating faster handovers for high-velocity users. Inter-eNodeB mobility history signalling [Release 8]: At the network, UE mobility history information is signalled on the X2 interface between eNodeBs. The UE mobility history information contains knowledge of previously serving cells for the terminal while in RRC Connected mode. The former also includes time-of-stay per cell and cell type; enumerated as very small, small, medium, large, and SO on. The network can utilize the UE mobility history information to estimate handover rate of the terminal and, based on that, adjust mobility parameters as well as decide if the user should be allowed handover to small cells, or mainly be kept at the macro layer. Signalling of UE mobility information [Release 12]: Mobility history reporting by the UE on RRC Idle to RRC Connected transition allows the network to more accurately estimate the UE mobility by using mobility history information stored and reported by UE. The UE indicates the availability of the stored history to the network. The UE stores its mobility state and global cell identity (GCID), or physical cell identity (PCI) if GCID is not available, as well as the duration of stay in the 16 most recently visited LTE cells, regardless of UE RRC state or PLMN (i.e. can also include emergency camped cells). Time spent outside LTE (in other radio access technology (RAT) or in out-of-service state) and the duration of such 'stay' is also recorded (w