 CQI measurements. Number of Best Sub- Ob00 report all sub-bands; bands (Nsub-bands) 0b01 1 best sub-band; Ob10 min(6,NsB) best sub-bands; Ob11 min(6,NsB) best sub-bands. 1 < Nsub-bands <NSB. Codebook Obo base mode with codebook coordination disabled; Coordination Ob1 base mode with codebook coordination enabled. Codebook Subset ObO report PMI from the base codebook or transformed base codebook; Ob1 report PMI from codebook subset or transformed codebook subset. Period (p) Transmit feedback header every 4p frames. The first report is to start at the next frame. Target Resource Unit This parameter indicates which resource units or which type of resource unit to use for feedback: Ob00 Latest best sub-bands reported for single-BS MIMO; 0b01 The entire transmission bandwidth; Ob10 FFR partition 0; Ob11 boosted FFR partition. Interference Ob00 PMI restriction for single-BS precoding; Coordination Type 0b01 PMI recommendation for single-BS precoding; Ob10 CL-MD for multi-BS precoding; Ob11 Co-MIMO for multi-BS precoding. Number of Multi-BS This parameter indicates the number of reports. Reports Maximum Number of Maximum number of users supported in Co-MIMO on the same Users resource (2, 3, 4). resource allocation. For the uplink HARQ burst allocated through the BR-ACK A-MAP IE, the maximum number of the HARQ re-transmissions is set to the default value (i.e., 4). Non-adaptive HARQ re-transmission is used. Table 10-14 shows the parameters and their corresponding values in the bandwidth request acknowledgement information element. 10.2 Downlink control channels Table 10-14 BR-ACK A-MAP IE Parameters [2] Parameter Size (Bits) Description A-MAP IE Type BR-ACK A-MAP IE. BR-ACK Bitmap Number of BR opportunities where each bit indicates the decoding status of BR preamble sequence in the corresponding BR opportunity. The length of bitmap determines based on the number of BR opportunities in a frame: Obo No BR preamble sequence is detected; Ob1 At least one preamble sequence is detected. MSB of Resource Start These are the most