l to notify the BS of its preferred frequency partition. For uplink FFR, the base station estimates the interference statistics in each frequency partition and may send messages containing interference information to the mobile stations. The interference information includes the frequency reuse parameters of each partition and the corresponding uplink power control parameters, as well as the target IoT level. A mobile station assigned to a partition needs to properly perform power control considering the target IoT level of other cells for that partition. If the CHAPTER 10 The IEEE 802. 16m Physical Layer (Part II) target IoT level of other cells for a partition is low, a mobile station assigned to that partition should transmit with lower power in order not to interfere with users in other cells. If the target IoT level of other cells for a partition is high, then a user assigned for that partition may transmit with higher power. To control system-wide interference, the base station can adjust the frequency partitions and the corresponding target IoT level in coordination with other base stations. The uplink FFR mechanism allows the BS to designate different uplink IoT control parameters YIoT in frequency partition. The uplink FFR configuration parameters, including the number of frequency partitions and size of each frequency partition, are broadcast through S-SFH SP2. The uplink IoT control parameter for each frequency partition is broadcast through the AAI_SCD MAC control message. If uplink FFR is enabled in a cell, different FFR patterns with power-boosted partitions are used by different base stations. In the example shown in Figure 10-48, FPCT = 4 and each cell selects one of the three FFR patterns. The index of the FFR pattern is set by a particular cell with its frequency partition number k. The FFR partition configuration is semi-static and does not change frequently. The interval between two FFR partition changes is determined by the FFR Partition Update Interval parameters [2]. In each FFR partition u