ding reuse factor in partition, power in partition, and multi-antenna mode, as well as interference- based measurements conducted at the mobile station. In the IEEE 802.16m standard, the size of the frequency partitions are selected as an integer multiple of physical resource units. The frequency partitions are indexed from the lowest LRU index to the highest index. The frequency partitions always start with a reuse-1 partition and continue with three reuse-3 or two reuse-2 partitions, depending on the value of the DFPC parameter and the transmission bandwidth. The frequency partitions are numbered as frequency partition 0 (FP0), frequency partition 1 (FP1), frequency partition 2 (FP2), or frequency partition 3 (FP3). In the downlink, the frequency partition configuration is signaled using the DFPC parameter in S-SFH SPO. The boosted frequency partition FP1 is a partition which has the highest power level. Each partition may have different power level per cell. The transmission power level relative to the reference power level on different frequency partitions is adjusted by the BS and signaled using an AAI_DL-IM management message or an S-SFH SP3. When FFR is used in the cell, i.e., FPCT > 1, different FFR power patterns are used by different base stations. For example, when FPCT = 4, each BS selects one of the three FFR patterns, as shown in Figure 10-8. When FPCT = 3 and FPS3 > 0, the same CHAPTER 10 The IEEE 802. 16m Physical Layer (Part II) Pattern 1 Transmit FD 1 Power Power FP Power FP Power Pattern 2 Transmit FP1 1 Power Power FP3 Power FP2 Power Pattern 3 Transmit FP Power Power FP Power FP Power Frequency Partition 1 Frequency Partition 2 Frequency Partition 3 Frequency Partition 4 Reuse-1 Partition Reuse-3 Partitions Logical Resource Units Downlink FFR Pattern 1 glot Pattern 2 glot Pattern 3 glot Frequency Partition 1 Frequency Partition 2 Frequency Partition 3 Frequency Partition 4 Reuse-1 Partition Reuse-3 Partitions Logical Resource Units Uplink FFR FIGURE 10-48 Illustration of fractional frequency 