processing + AAI_PKM-RSP) + transmission) transmission) HARQ retransmission BS Registration < 5 ms < 5 ms (AAI_REG-REQ + BS/ASN-GW 1 X 5 ms for HARQ re- 3 X 5 ms for HARQ re- processing + AAI_REG-RSP) + transmission) transmission) HARQ retransmission RRC Connection Establishment < 5 ms1 X 5 ms for HARQ re- < 5 ms3 X 5 ms for HARQ re- (AAI_DSA-REQ + BS processing + transmission) transmission) AAI_DSA-RSP + AAI_DSA-ACK) + HARQ retransmission C-Plane Connection Establishment < 31 ms < 33 ms Delay IDLE_STATE->ACTIVE_ACTIVE < 71 ms < 73 ms Delay Note: It can be assumed that MS might have updated system configuration prior to transition 12.9 IEEE 802.16m link-level and system-level performance Serving Target AAI_HO-REQ Initiated AAI HO-RSP AAI_HO-CMD AAI_HO-REQ AAI_HO-REQ Initiated AAI HO-RSP AAI_HO-CMD AAI HO-IND Network Re-entry MS-BS Communication during Network Re-entry AAI HO-CMPLT Data-Plane Established FIGURE 12-10 The IEEE 802.16m handover procedures [12] (5) the seamless handover procedure is used [12]. All measurements are based on the synchronization channels. Table 12-15 summarizes the handover procedure delay budget. Therefore, IEEE 802.16m meets the ITU-R requirement for handover interruption time. 12.9.6 Frequency Bands and Operation Bandwidth The ITU-R requires IMT-Advanced systems to support a scalable bandwidth up to 100 MHz through aggregation of smaller frequency bands. The ITU-R further requires the IMT-Advanced systems to support the IMT bands that are designated by ITU-R for deployment of the 3rd and 4th generations of cellular systems. The IEEE 802.16m specifies multi-carrier techniques through which support of various contiguous or non-contiguous spectra are possible. The band classes specified by the WiMAX Forum allow deployment of the IEEE 802. 16m in IMT bands in the form of TDD or FDD duplex schemes. Table 12-16 shows the frequency bands in which the IEEE 802.16m can be deployed. 12.9.7 IEEE 802.16m Link Budget The IMT-Advanced submissions were required to provide a detailed link budget ana