Under IEEE 802.16m, an AMS transitions between four states that are shown in Figure 5.3. These states are:
The network entry and initial ranging procedures are performed while an AMS is in Initialization and Access States. Periodic and other (e.g., for handover) ranging procedures are performed while an AMS is in a connected state.
The procedures can be related to the states as follows. When an AMS is in the initialization state it performs the following tasks:
Once b) and c) are performed, the AMS transitions to the Access State and performs the following tasks.
An AMS transitions to the Connected State once h) is performed.
For multicarrier operation, an AMS only attempts network entry and initial ranging with a fully configured carrier. Detecting an A-PREAMBLE, the AMS would decode the SFH and other system parameters and configuration information by which the ABS indicates its support for the multicarrier feature. Once a candidate primary carrier is selected by the AMS, network entry proceeds normally. If successful, the same carrier ...