rements of eight LRUs in the range of 48 to 88 LRUs, and all resource sizes in increments of one LRU are assignable in the range of 92 to 96 LRUs. As shown in Figure 10-7, in order to determine the resource index RI for an allocation, the BS requires the size S and index l of the LRU from which the scheduled allocation begins. The BS also maintains a vector Ia of length Nmax in which the non-zero entries contain the starting index for each of 10.2 Downlink control channels Table 10-4 DL Basic Assignment A-MAP IE Parameters [2] Information Field Size (Bits) Description A-MAP IE Type It defines what parameters are included in this A-MAP IE. The A-MAP IE Type distinguishes between assignment A-MAP IEs used for the UL/DL, and assignment A-MAP IEs used for resource allocation as well as control signaling. Some additional A-MAP IE types are reserved for future use. SizeOffset Offset used to calculate the burst size index. MIMO Encoder Format This parameter specifies the MIMO encoder type that is used with this resource assignment (i.e., Space- Frequency Block Coding, Vertical Encoding, Multi- layer Encoding, or Conjugate Data Repetition). Number of Streams Used in the In the case of vertical encoding, this parameter Transmission identifies is the number of streams that ranges from 1 to 8. Note that the number of streams must be smaller than the number of base station transmitting antennas. In the case of multi-layer encoding, an index is used to identify the combination of the number of streams and the allocated pilot stream index in a transmission with MU-MIMO and the modulation constellation of paired user in the case of dual-stream transmission. Resource Index This parameter identifies the starting LRU index and size of a single allocation spanning contiguous LRUs. The resource index includes location and allocation size. Long TTI Indicator Indicates number of subframes spanned by the allocated resource: Ob0: 1 subframe (default); Ob1: 4 DL subframes for FDD or all DL subframes for HARQ Feedback Allocation In the ca