48, respectively, and all values in Ia correspond to non-zero indices for every allocation size. At the receiver, the 11-bit resource index RI contained in the DL/UL Basic Assignment A-MAP IE is used to determine the assigned resource size S. The ith entry in the vector Ia with the maximum possible value is found such that Ia (i) RI: the value i that satisfies the latter equation is the assigned resource size, i.e., S ie max {Ta(i)|Ia(i) < RI}. The starting LRU index of the allocation is determined by subtracting the value of la corresponding to the assigned resource size S from the index RI contained in the DL/UL Basic Assignment A-MAP IE, i.e., Ia(s). The UL Basic Assignment A-MAP IE is used for resource assignment in the uplink. Regardless of the duration of the TTI of the UL burst, the number of LRUs that are allocated to an MS within a specific subframe must be smaller than the number of LRUs in that subframe over all used sub- carriers. Table 10-5 shows the parameters of this information element. The procedure depicted in Figure 10-8 describes the parsing of information fields in the UL Basic Assignment A-MAP IE to determine the MIMO transmission format and the associated parameters used for transmission on the uplink. The PMI Indicator is used for explicit signaling of PMI. The CSM flag is used to distinguish between SU-MIMO and collaborative spatial multiplexing operation in the uplink. The non-adaptive precoding is used for SFBC. The precoding flag PF is not always signaled, and is only used when PMI is not signaled in order to identify the type of precoding. For CSM and SU- MIMO with vertical encoding (single codeword), when PF is set to 0b0, the MS uses non-adaptive precoding, and when the PF is set to Ob1, the MS uses adaptive precoding. This is performed using the precoder of rank NS based on the mobile station's choice. The MIMO encoder format (SFBC or vertical encoding) is signaled only when neither CSM nor PMI is signaled. The DL Sub-band Assignment A-MAP IE is relatively more efficient method to 