e CQI report. If Ns is set to one, then the MS assumes it will not be paired with any other mobile stations when it calculates the CQI. If MFM = 5 is included in the Feedback Allocation A-MAP IE, Ns indicates the rank of the open- loop codebook subset which belongs to the unitary matrix from which the MS should feedback its preferred stream index on a given physical sub-band. If a MIMO feedback mode is used which supports SU-MIMO, NS would indicate the maximum spatial rate allowed in the feedback. The BS use of Ns takes into consideration the fact that the spatial rate is less than min(N,Nr) for the MS. If the Measurement Method Indication flag is 0b1 then Ns indicates the rank of the open-loop region for which the feedback is provided. The open-loop region type is derived from the Ns and MIMO feedback Table 10-6 RA Bit to SLRU Index Mapping (NSB < 3) [2] RA[/] 0 (LSB) 9, 10 (Not Used) SLRU[k] Indexed by RA[/] 10.2 Downlink control channels Table 10-7 Feedback Allocation A-MAP IE Parameters [2] Parameter Size (Bits) Description Channel Index A unique identifier of a fast feedback channel on which an MS can transmit fast feedback information. A one-to-one relationship is established between channel index and the MS using this allocation. Short-Term The short-term feedback is transmitted on the PFBCH/SFBCH Feedback Period (p) every 2P frames. Long-Term A long-term feedback is transmitted on the FBCH every 29 short- Feedback Period (q) term feedback opportunity (i.e., every 2029 frames). The long-term feedback is not transmitted, if q = Ob00. Frame Number The MS starts reporting at the frame which number in the superframe is equal to Frame_Number. If the current frame is specified, the MS starts reporting in four frames. Frames are numbered from 0 to 3 in the superframe. Subframe Index Indicate the UL subframe index in the UL portion of the frame. Allocation Duration A parameter that indicates transmission of a feedback on the fast feedback channel indexed by Channel Index during the next 2 (3+d) frames. If d = 0b00