CK offset. The successfully received preamble sequences, if any, are included in ascending order. The bandwidth request opportunities are encoded in ascending order, based on the number of the uplink subframe in which they are contained in single or multiple BR-ACK A-MAP IEs. The BR-ACK A-MAP IE cannot be segmented. In addition, the BR-ACK A-MAP IE also includes the allocation information for the fixed-sized bandwidth request header. The uplink resource and HARQ feedback channel will be allocated to the preamble sequences whose grant indicator is set to one. The allocations are in ascending order based on the index of preamble sequences. If uplink resource for the BR header is not allocated through the BR-ACK A-MAP IE, CDMA Allocation A-MAP IE is used for the uplink 10.2 Downlink control channels Table 10-13 Feedback Polling A-MAP IE Parameters [2] Parameter (Bits) Description A-MAP IE Type Feedback polling A-MAP IE. Polling Sub-type Obo uplink resource allocation or de-allocation; 0b1 feedback mode allocation or de-allocation. Allocation Duration (d) The allocation is valid for 2(d-1) superframes starting from the superframe defined by allocation relevance. If d = 0b000, the pre-scheduled feedback header transmission is released. If d = Ob111, the pre- scheduled feedback header transmission is valid until further notification from the BS. Resource Index Confirmation of the resource index for a previously assigned persistent resource that has been de-allocated (resource index includes location and allocation size): 5 MHz 0 in 2 most significant bits + 9 bits for resource index; 10 MHz 11 bits for resource index; 20 MHz 11 bits for resource index. Polling De-allocation The MS is required to support up to 3 distinct and concurrent feedback Bitmap allocations including one or several MIMO feedback modes, the transmit correlation matrix, and multi-BS MIMO feedback. The ordering of concurrent allocations in this bitmap is MFMi, MFM j (j > i), MFMK (k>), transmit correlation matrix, and multi-BS MIMO feedback. HARQ Fee